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363 - Electric power conversion systems

363013000 - CURRENT CONVERSION

363123000 - Using semiconductor-type converter

363125000 - In rectifier systems

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DocumentTitleDate
20100054007POWER SUPPLY APPARATUS WITH LOW POWER IN STANDBY MODE - Provided is a power supply apparatus with low power in a standby mode. The apparatus includes a voltage multiplier configured to multiply an input voltage and including a first terminal through which the multiplied voltage is output and a second terminal through which a voltage lower than a voltage of the first terminal is output; a main switch-mode power supply (SMPS) configured to receive the voltage of the first terminal of the voltage multiplier; and a standby SMPS configured to receive a voltage of the second terminal of the voltage multiplier.03-04-2010
20080259663METHODS AND APPARATUS FOR THREE-PHASE RECTIFIER WITH LOWER VOLTAGE SWITCHES - Methods and apparatus to provide a rectifier having a high power factor not limited by voltage ratings of switching devices. Methods and apparatus can include pairs of series-coupled switches coupled to a respective phase signal to, along with respective diode pairs, apportion voltage over a series of load capacitors coupled across the rectifier DC output terminals.10-23-2008
20100014334ELECTRIC POWER SUPPLY CIRCUIT - An electric power supply circuit includes a diode bridge circuit (01-21-2010
20090257260ANALOG INPUT DEVICE - An analog input device according to the present invention includes a scanning circuit (10-15-2009
20100080027INTEGRATED AIRCRAFT POWER CONDITIONING UNIT - An integrated power conditioning unit includes a DC bus, a first terminal for connection to first AC equipment, a second terminal for connection to second AC equipment, a first inverter circuit providing bi-directional AC-DC conversion between a first AC power signal and a first DC power signal, and a converter assembly providing bi-directional AC-DC conversion between a second AC power signal and a second DC power signal. A control module controls the first inverter circuit such that the first DC power signal may flow from/to the DC bus and the first AC power signal may flow from/to the first terminal. The control module also controls the converter assembly such that the second AC signal power signal may flow from/to the second terminal and the second DC power signal may flow from/to the DC bus.04-01-2010
20110194321DC POWER SUPPLY APPARATUS - A DC power supply apparatus comprising: a rectifying circuit including, a first rectifying portion, a second rectifying portion, a third rectifying portion and a fourth rectifying portion; a current detection portion; a first switching portion; and a second switching portion; wherein each of the first rectifying portion cooperatively operating with the first switching portion and the second rectifying portion cooperatively operating with the second switching portion is a semiconductor element which is formed by using a Schottky junction formed between silicon carbide or gallium nitride and metal and has a withstanding voltage property with respect to a voltage of an AC power supply.08-11-2011
20100157637GREEN-ENERGY POWER GENERATOR FOR ELECTRICAL DISCHARGE MACHINE - This invention relates a green-energy power generator for electrical discharge machine, which comprise: an alternating current (AC) power supply, an AC-to-DC power converter, a DC-to-DC power converter, a current limiting unit, a time limiting unit, and a control unit. It can reduce the unnecessary energy consumption and achieve the objective of energy saving.06-24-2010
20100118577SINE WAVE LAMP CONTROLLER WITH ACTIVE SWITCH COMMUTATION AND ANTI-FLICKER CORRECTION - A pulse width modulated half bridge dimming controller for dimming a lighting ballast is described. The top half of the bridge is comprised of two switches, the top switch set, and the bottom half of the bridge is comprised of two switches, the bottom switch set. Each switch also has a diode in parallel with it. The drivers for the switches are configured so that each of the switches can be turned on and off independently of all of all the other switches. Preferably, the controller is capable of operating in all four quadrants. In one preferred embodiment the switches are IGBTs. The switches are controlled in a manner so that when one of the switch sets changes states, the second switch set has one switch on and one switch off, so that one of the diodes in the second switch set is disposed to block shoot through and provide a path to allow current to continue flowing in the inductive load.05-13-2010
20130208521HYBRID HVDC CONVERTER - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation which comprises at least one converter limb including first and second DC terminals for connection in use to a DC network, the or each converter limb including at least one first converter block, and at least one second converter block connected between the first and second DC terminals; the or each first converter block including a plurality of line-commutated thyristors and at least one first AC terminal for connection in use to an AC network, the or each second converter block including, at least one auxiliary converter including a plurality of self-commutated switching elements; wherein the self-commutated switching elements are controllable in use to inject a voltage to modify a DC voltage presented to the DC side of the converter limb and/or modify an AC voltage and an AC current on the AC side of the power electronic converter.08-15-2013
20130135909OUTPUT ADJUSTMENT CIRCUIT FOR POWER SUPPLY UNIT - An output adjustment circuit includes a rectifier and filter circuit, a voltage drop circuit, a voltage output circuit, a PWM regulator, and a feedback circuit. The rectifier and filter circuit receives an AC voltage and converts it into a square wave signal. The voltage drop circuit includes a primary coil and a secondary coil. The primary coil is connected to the rectifier and filter circuit. The primary coil receives the square wave signal. The voltage output circuit is connected to the secondary coil. The PWM regulator is connected to the primary coil. The PWM regulator generates a pulse signal to turn on and turn off the primary coil periodically. The feedback circuit controls a duty cycle of the pulse signal to adjust a during time of the primary coil being on in a cycle. The primary coil transmits energy to the secondary coil according the during time.05-30-2013
20130077370AC-TO-DC POWER SUPPLY APPARATUS AND POWER CONTROL STRUCTURE AND METHOD THEREOF - An AC-to-DC power supply apparatus and a power control structure and method thereof are provided. The provided method includes: making an AC-to-DC converter in the AC-to-DC power supply apparatus convert an AC input voltage in response to a driving signal, so as to generate a DC output voltage; sampling a rectified voltage relating to the AC input voltage, so as to provide a sampling signal; providing an output feedback signal relating to an output of the AC-to-DC converter; multiplying the sampling signal by the output feedback signal, so as to provide a product signal; performing a signal modulation on the product signal, so as to generate the driving signal to control a switching of a main power switch in the AC-to-DC converter; and performing an amplitude-limiting process on the sampling signal or the product signal.03-28-2013
20130077368POWER SYSTEM INCLUDING AN ELECTRET FOR A POWER BUS - A power system for an alternating current power bus includes an electret operatively associated with the alternating current power bus. The electret includes an output having an alternating current voltage when the alternating current power bus is energized. A rectifier includes an input electrically interconnected with the output of the electret and an output having a direct current voltage responsive to the alternating current voltage of the output of the electret. A powered device includes an input electrically interconnected with the output of the rectifier. The powered device is powered responsive to the direct current voltage of the output of the rectifier.03-28-2013
20130039105FILTER CIRCUIT FOR A MULTI-PHASE AC INPUT - A filter circuit is employed to filter undesirable harmonics in a multi-phase AC input and provide damping for oscillations associated with the filter circuit. The filter circuit includes a damping circuit connected between phases of the multi-phase AC input. The damping circuit including a rectifier for rectifying harmonics in the multi-phase AC input and a single damping resistor connected across the rectifier.02-14-2013
20130077369POWER CONVERTER AND THE METHOD THEREOF - The present disclosure discloses a power converter providing a low output voltage from an offline AC. The power converter defines a voltage window for the input AC signal. Inside the voltage window, the rectified DC waveform is passed through to the output and the storage capacitor; outside the voltage window, the power converter is idle (or the output is blocked from input) and let the output storage capacitor alone supply the load.03-28-2013
20100046262Control Apparatus and Control Method for a Power Factor Correction Power Converter - A control apparatus and a control method for a power factor correction power converter are provided. The control apparatus is configured to reduce the variation rate of a reference signal with a rising portion and a falling portion. When the primary winding almost completely releases the stored energy, and the falling portion of the reference signal reaches a determined condition, the control apparatus turns on a switch for increasing the stored energy of the primary winding.02-25-2010
20100046261Apparatus and Method for Zero-Voltage Region Detection - An apparatus and a method for detecting zero-voltage region detection are provided. The apparatus for zero-voltage region detection is configured to detect whether an input voltage approaches a zero voltage through an auxiliary winding, and to detect whether a primary winding almost completely releases the stored energy through the auxiliary winding.02-25-2010
20100046260Feeding of output-side parallel connected bridge rectifiers with phase-shifted voltages from the secondary windings of at least one transformer - A device is disclosed for generating DC voltage from AC voltage. The device includes parallel connected diode bridges which are fed via at least one transformer, the primary windings of which are connected in series. The DC voltage is used for supplying DC paths, and secondary voltages on the secondary windings of the transformer have different phase angles. This is achieved in at least the embodiment, e.g., by the fact that one secondary winding is connected in a delta configuration, and another secondary winding is connected in a star configuration.02-25-2010
20100046259SINGLE-PHASE SELF-DRIVEN FULL-BRIDGE SYNCHROUNOUS RECTIFICATION - A full-bridge rectifier is configured to provide synchronous rectification with either a current-source or a voltage-source. The rectifier has an upper branch and a lower branch and two current loops, with each of the branches including voltage- or current-controlled active switches, diodes or combinations thereof that are selected such that each loop includes one active switch or diode from the upper branch and one active switch or diode from the lower branch, and each current loop comprises at least one diode or current-controlled active switch, and at least one voltage- or current-controlled active switch is included in one of the upper or lower branches.02-25-2010
20090296439MULTI OUTPUT VOLTAGE REGULATION OF A SYNCHRONOUS GENERATOR IN A POWER SYSTEM - In typical commercial/aerospace applications, synchronous generators provide power to both the high voltage and the low voltage loads. This disclosure describes a method of regulating the output voltage for all of the loads.12-03-2009
20090244944POWER CONVERTER SYSTEM THAT OPERATES EFFICIENTLY OVER A RANGE OF LOAD CONDITIONS - A power converter system supplies power to one or more loads. The power converter system comprises at least one power converter operating at a desired efficiency; and a power storage system coupled to the at least one power converter for receiving power supplied from the at least one power converter and storing power therein when the at least one power converter operates at an efficiency that is below the desired efficiency.10-01-2009
20100110740PWM power regulator device - A PWM power regulator device has a processor, an input interface circuit, a zero phase detecting circuit and a thyristor. The input interface circuit is connected to a PWM output terminal of an external digital control circuit and the processor. The processor calculates a period and duty cycle of a PWM signal from the PWM output terminal and then outputs a triggering signal to the thyristor. The thyristor is triggered at different conduct angle according to the triggering signal and the triggering signal is determined by the processor according to the PWM signal. Therefore, the power regulator device is directly connected to the PWM output terminal of the digital control circuit without digital to analog converter.05-06-2010
20130083578PRIMARY SIDE PFC DRIVER WITH DIMMING CAPABILITY - A primary side PFC driver circuit is disclosed that includes a switch control circuit for commanding a switch to allow an inductor coupled to an output load (e.g., LEDs) to transfer energy provided by an input voltage source. The switch control circuit provides two signals for commanding the switch. A first signal having a first frequency, with a duty cycle in proportion to the input voltage amplitude, commands the switch to allow the average input current to be proportional to the input voltage amplitude. A second signal having a second frequency higher than the first frequency pulses the output load with substantially constant current pulses based on a value of the first signal (e.g., while the first signal is high). The current pulses produce a substantially constant current in the output load.04-04-2013
20130083577OFFLINE LOW VOLTAGE DC OUTPUT CIRCUIT WITH INTEGRATED FULL BRIDGE RECTIFIERS - The present disclosure discloses an offline low voltage DC output circuit with integrated full bridge rectifiers. The offline low voltage DC output circuit comprises two depletion high voltage pass transistors and a bridge rectifier, wherein most of the voltage is dropped across the pass transistor device. In one embodiment, the offline low voltage DC output circuit further comprises a ballast resistor to minimize substrate injection.04-04-2013
20090154208POWER SUPPLY DEVICE - A power supply device with power conversion capabilities is disclosed. The power supply device comprises an input module, a power converter, and an output module. The input module is used for receiving an alternating current power. The power converter is coupled to the input module for converting the alternating current power to a direct current power. The output module is coupled to the power converter for outputting the direct current power.06-18-2009
20130027999DISCHARGE CIRCUIT AND METHOD - In accordance with an embodiment, a power supply may include a filter stage coupled to an input terminal of a discharge circuit and a supply capacitor coupled to an output terminal of the discharge circuit. In accordance with another embodiment, a method for discharging at least one capacitor includes discharging the at least one capacitor in response to a signal at the input terminal of the discharge circuit being different from a reference signal.01-31-2013
20090290396CAPACITIVE POWER SUPPLY SYSTEM - The invention relates to a power supply system (11-26-2009
20120182775THREE-PHASE BUCK-BOOST POWER FACTOR CORRECTION CIRCUIT AND CONTROLLING METHOD THEREOF - The configurations of a three-phase buck-boost power factor correction (PFC) circuit and a controlling method thereof are provided in the present invention. The proposed circuit includes a first single-phase buck-boost PFC circuit receiving a first phase voltage and having a first and a second output terminals and a neutral-point for outputting a first and a second output voltages, a second single-phase buck-boost PFC circuit receiving a second phase voltage and coupled to the first and the second output terminals and the neutral-point, a third single-phase buck-boost PFC circuit receiving a third phase voltage and coupled to the first and the second output terminals and the neutral-point, a first and a second output capacitors coupled to the first and the second output terminals respectively, and to the neutral-point also and a neutral line coupled to the neutral-point.07-19-2012
20130070500POWER CONVERSION APPARATUS - According to one embodiment, a power conversion apparatus includes a first LC circuit, a first switch, a second switch, a smoothing capacitor, a second LC circuit and a controller. The first switch is connected to the AC power supply through the first LC circuit. The second switch is connected in series to the first switch. The smoothing capacitor is connected in parallel to a series circuit of the first switch and the second switch. The second LC circuit is connected between a connection point between the first switch and the second switch and a load. The controller outputs a first pulse signal to the first switch when a voltage polarity of the AC power supply is positive, and outputs a second pulse signal to the second switch when the voltage polarity is negative.03-21-2013
20130070501METHOD OF REDUCING COMMON MODE CURRENT - Method of reducing common mode current (i) flowing between the internal ground (03-21-2013
20130070498POWER ADJUSTABLE, ISOLATED AND TRANSFORMERLESS AC TO DC POWER CIRCUIT - A power adjustable, isolated and tranformerless AC to DC power circuit is revealed. The AC to DC power circuit includes a first reactance component, a second reactance component, a third reactance component and an AC power connected to form a loop. The third reactance component is connected to an input end of a full bridge rectifier and a filter capacitor is connected across to an output end of the full bridge rectifier for output of a stable low voltage DC. Thereby AC power is isolated to avoid electric conductance or shock. Moreover, the manufacturing cost is dramatically reduced, the power is saved, and no heat is generated. Furthermore, the reactance of the whole circuit is reduced so as to get high power factor. The AC to DC power circuit has no high frequency radiation, no radiation damage and no interference to sensitive electronic equipment.03-21-2013
20130070499Switched Power Converter - A power converter includes a DC port and an AC port. A set of controllable “DC” switches couples the DC port to a central series-resonant circuit, and a set of “AC switches couples the central circuit through a filter to the AC port. A switch control circuit responds to secondary-to-tertiary and inversion time percentages, and a modulator is responsive to the AC filter voltage and to the current at the AC port, for generating the inversion (inv) and secondary-to-tertiary (s2t) time percentages.03-21-2013
20130070497POWER SUPPLY WITH VIRTUAL BY-PASS SYSTEM - The power supply comprises a bridge rectifier connected to an AC source; a boost converter series-connected to the bridge rectifier comprising an inductance coil; a filter capacitor series-connected to the boost converter; a DC/DC converter connected to a load; a hold-up-time enhancer connected to and positioned between the filter capacitor and the DC/DC converter; and a virtual by-pass system parallel-connected to the hold-up-time enhancer comprising an induction coil inductively coupled to the inductance coil of the boost converter. As such, voltage is induced on the induction coil by the inductance coil in the boost converter and the virtual by-pass system parallel-connected to the hold-up-time enhancer is thereby turned on and off.03-21-2013
20110002149CONVERTER - A converter has a network-side and a load-side power converter that are connected together on the DC side in an electrically conductive manner. An upper and a lower valve branch of each phase module, respectively, of the load-side power converter has at least one two-poled subsystem. At least one multiphase network-controlled power converter is provided as the network-side power converter. In this way, a converter is obtained, in particular an intermediate voltage circuit converter for intermediate voltages, which combines a simple and cost-effective feed circuit on the network side with a modular multilevel converter on the load side.01-06-2011
20110002148POWER RECTIFIER CIRCUIT AND SYSTEMS, ASSOCIATED METHOD, AND AIRCRAFT COMPRISING SUCH A CIRCUIT OR SYSTEMS - A power rectifying circuit for an electric current signal supplied by an alternating power source, which includes: two separate switching assemblies adapted to be connected to a power terminal of the source, wherein at least one switching assembly includes a plurality of boost cells in cascade, each boost cell including a diode, a switch mechanism and a capacitor, the capacitors of the two terminal boost cells of the switching assemblies having one terminal in common. The circuit may include two assemblies of boost cells, and can be used in electric systems onboard aircrafts.01-06-2011
20130051101HOLD-UP TIME CIRCUIT, HOLD-UP TIME METHOD, AND POWER SUPPLY SYSTEM - A hold-up time circuit is provided, including: an energy storage capacitor, a step-down circuit and a step-up circuit. A first and a second input end of the step-down circuit are connected to two electrodes of an input power supply. A first output end and a second output end of the step-down circuit are connected to two electrodes of the energy storage capacitor. When the input power supply is normal, the step-down circuit is configured to perform reduction processing on an input voltage of the input power supply, and the energy storage capacitor is charged by an output of the step-down circuit. A first and a second input end of the step-up circuit are connected to the two electrodes of the energy storage capacitor. When the input power supply is power-off, the step-up circuit is configured to perform boost processing on an energy storage voltage of the energy storage capacitor.02-28-2013
20130088904ALTERNATING-CURRENT/DIRECT-CURRENT CONVERTER - An alternating-current/direct-current converter includes a rectifier, a reactor, a capacitor, and a switching rectifier. The rectifier is configured to rectify alternating-current voltage output from an alternating-current power source, thereby converting the alternating-current voltage into direct-current voltage, and to output the direct-current voltage. The capacitor includes terminals. The switching rectifier is coupled to the AC power source and switchable to output the direct-current voltage to the capacitor.04-11-2013
20090303766METHOD AND APPARATUS FOR INCREASING THE POWER CAPABILITY OF A POWER SUPPLY - Techniques are disclosed to extend an on time period of switch to regulate a transfer of energy from an input of a power supply to an output of a power supply. One example integrated circuit includes an energy transfer element coupled between an input and an output of the power supply. A switch is coupled to the input of the energy transfer element. A controller is coupled to the switch to control switching of the switch to regulate a transfer of energy from the input of the power supply to the output of the power supply in response to a feedback signal received from the output of the power supply. The controller is coupled to limit a maximum on time period of the switch a first maximum on time period in response to a first range of power supply operating conditions and to a second maximum on time period for a second range of power supply operating conditions.12-10-2009
20120218796COMPOUND SEMICONDUCTOR DEVICE, METHOD FOR PRODUCING THE SAME, AND POWER SUPPLY - A compound semiconductor device includes: a substrate; a first compound semiconductor layer formed over the substrate; a second compound semiconductor layer formed over the first compound semiconductor layer; and an upper electrode formed over the first compound semiconductor layer, wherein two-dimensional hole gas is generated in a region of the first compound semiconductor layer, the region being located at an interface between the first compound semiconductor layer and the second compound semiconductor layer, so as to have a hole concentration that decreases with increasing distance from the upper electrode.08-30-2012
20090091959POWER SUPPLY UNIT, IMAGE FORMING APPARATUS, AND METHOD FOR CONTROLLING POWER SUPPLY - In an image forming apparatus, a monitoring unit monitors whether a returning factor required to switch an operational state of the apparatus from a power-saving mode to an operating mode is generated, an antenna unit receives external electrical wave, a power generation unit generates electricity from the received electrical wave and supplies the electricity to the monitoring unit, and a controlling unit switches the operational state of the apparatus from the power-saving mode to the operating mode when the monitoring unit detects generation of a returning factor.04-09-2009
20110013437DC-DC Converter And Its Controlling Method - A unidirectional DC-DC converter and method of control thereof. The converter includes a DC power-supply, a buck converter circuit having a first main switching element, a boost converter circuit having a second main switching element, a first snubber capacitor, a first inversely-parallel diode, a control device, and an output diode.01-20-2011
20110013436BRIDGELESS PFC CIRCUIT SYSTEM HAVING CURRENT SENSING CIRCUIT AND CONTROLLING METHOD THEREOF - The configurations of a bridgeless PFC circuit system and a controlling method thereof are provided. The proposed system includes a bridgeless PFC circuit including a first bridge arm having a first and a second terminals and a first middle point, a second bridge arm having a first and a second terminals and a second middle point, and a bidirectional switch coupled between the first middle point and the second middle point, and an inductor coupled between the first middle point and an AC power source coupled to the second middle point, and a current sensing circuit including a first current transformer sensing a first current flowing through the bidirectional switch, which having a primary side winding coupled to the bidirectional switch and a first and a second secondary side windings, and a switching device coupled to the two secondary side windings.01-20-2011
20110013435AC DETECTION CIRCUIT FOR POWER SUPPLY - There is provided an alternating current (AC) detection circuit for power supply, the AC circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage rectified by the rectifying part according to a preset division ratio; a voltage stabilization circuit part stabilizing the voltage divided by the voltage division part; and a first square wave generating part comparing the voltage stabilized by the voltage stabilization circuit part with an internal reference voltage, and generating a first square wave signal having a duty ratio according to comparison results between the stabilized voltage and the internal reference01-20-2011
20090268496THREE-PHASE BUCK-BOOST POWER FACTOR CORRECTION CIRCUIT AND CONTROLLING METHOD THEREOF - The configurations of a three-phase buck-boost power factor correction (PFC) circuit and a controlling method thereof are provided in the present invention. The proposed circuit includes a first single-phase buck-boost PFC circuit receiving a first phase voltage and having a first and a second output terminals and a neutral-point for outputting a first and a second output voltages, a second single-phase buck-boost PFC circuit receiving a second phase voltage and coupled to the first and the second output terminals and the neutral-point, a third single-phase buck-boost PFC circuit receiving a third phase voltage and coupled to the first and the second output terminals and the neutral-point, a first and a second output capacitors coupled to the first and the second output terminals respectively, and to the neutral-point also and a neutral line coupled to the neutral-point.10-29-2009
20090268495Electric circuit, use of a semiconductor component and method for manufacturing a semiconductor component - The invention relates to an electric circuit comprising at least one semiconductor component (10-29-2009
20090010032Power supply capable of reducing secondary-side noise - A switching power supply capable of reducing secondary-side noise mainly has at least one decoupling device for guiding the secondary-side noise to at least a terminal of an AC power supply. Thus, the secondary-side high-frequency noise can be reduced, and the quality in using the electronic apparatus product, which is electrically connected to the output of the switching AC-to-DC power supply, can be greatly enhanced.01-08-2009
20120113699Converter - A voltage source converter for use in high voltage DC power transmission and reactive power compensation. The voltage source converter comprises at least one converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal for connection in use to an AC network.05-10-2012
20130188407Controller for a switched mode power converter, a switched mode power converter and method of controlling the same - A method of controlling a switched mode converter is disclosed in which the switching frequency varies in proportion to the square of the sine of the phase of the input AC supply. Thus the switching frequency is a maximum, and the respective on period of the switch is a minimum, when the mains voltage is a maximum. Conversely, the switching frequency is reduced, and the respective on time of the switch is increased, when the mains voltage is reduced. Such a switching method provides for a high power factor. Implementation by means of a phase locked loop and a comparator may prevent the need for complex circuitry, and may provide for direct use of a digital controller or digital signal processing through a counter output in the phase locked loop.07-25-2013
20120236613ELECTRONIC DEVICE - An electronic device including a power switch, a switch unit, a power supply unit and a control unit is provided. Two power ends of the power switch are connected in parallel with two connecting terminals of the switch unit. The power supply unit generates a system voltage by a power come from the power switch or the switch unit. When the two power ends of the power switch are conducted for a predetermined time, the power is provided to the power supply unit and the electronic device starts up. Furthermore, the control unit controls the switch unit to conduct the two connecting terminals, so that the power is still provided to the power supply unit through the switch unit after the two power ends are disconnected. When the electronic device is shut down, the control unit controls the switch unit to disconnect the two connecting terminals.09-20-2012
20120236612SWITCHING POWER SUPPLY APPARATUS - In a switching power supply apparatus, an alternating-current input power supply is input to the input terminals of a power factor correction converter and a DC-DC converter is connected to output terminals. A load is connected to the output of the DC-DC converter. A digital signal processing circuit takes the product of an output voltage error and a detection value of the input voltage as a current reference amplitude value and controls the on period of a switching element in accordance with the difference between the current reference amplitude value and the current flowing through an inductor. The target value of the output voltage or the output voltage error is corrected using a value that is proportional to the current reference amplitude value such that the output voltage rises as the load goes from a light to a heavy load state.09-20-2012
20120236611POWER LINE CURRENT FED POWER SUPPLIES PRODUCING STABLE LOAD CURRENTS AND RELATED METHODS - Power line current fed power supplies producing stable load currents and related methods are described. The power supplies may include a current transformer coupled to an inductive network. In some embodiments, the current transformer operates in saturation mode. In some embodiments, a substantially constant DC current is generated having a magnitude that remains substantially constant despite variations of the magnitude of AC current in the power line.09-20-2012
20100172164AC Adapter and the Control Method Thereof - An AC adapter including an AC-side plug module and a DC-side connector module coupled to each other is provided. A first voltage-reducing element and a relay are electrically coupled to an AC power supply. An AC-to-DC converter is electrically coupled to the relay. The DC-side connector module has a mechanical switch element electrically coupled to the relay and the first voltage-reducing element. When the DC-side connector module is connected to a device socket, the mechanical switch element is turned on and the relay is enabled, so that the electrical power of the AC power supply is transmitted to the AC-to-DC converter through the enabled relay. When the DC-side connector module is disconnected from the device socket, the mechanical switch element is turned off and the relay is disabled, so that the electrical power of the AC power supply is not transmitted to the AC-to-DC converter.07-08-2010
20110157942Controllable Universal Supply with Reactive Power Management - Apparatus and associated methods involve a controllable supply adapted for controlling switch phasing and pulse width to substantially equalize power in adjacent quadrants of a sinusoidal source voltage waveform to regulate reactive power drawn from the source. In an illustrative example, the supply may, in some embodiments, deliver power to a load at a level responsive to a commanded input signal. In some examples, the power supplied to the load may be adjusted according to the command input signal to a selected value within an operating range. In some examples, the operating range may include a portion or all of 0 to 100% of rated load. Various embodiments may be adapted to supply unipolar or bipolar load excitation. In some embodiments, high power factor may be maintained over a substantial range of commanded power to the load. Certain embodiments may enhance supply efficiency by capturing and recycling inductive load energy.06-30-2011
20120212986SWITCHING POWER SUPPLY APPARATUS - A switching power supply apparatus includes: an input part; an input filter provided for a power factor correction circuit, which includes at least a line capacitor; a bridgeless power factor correction circuit that is connected to the input part; and an inrush current suppression circuit to suppress inrush current, wherein the bridgeless power factor correction circuit comprises: a conversion unit, which has a boost inductor unit and a switching circuit connected to the boost inductor unit; and a smoothing unit that is connected to an output terminal side of the conversion unit, and wherein the inrush current suppression circuit is arranged at least one of: a path connecting between an end of the input filter and the boost inductor unit; a path connecting between the boost inductor unit and the switching circuit; and a path connecting between the switching circuit and the smoothing unit.08-23-2012
20100014333ELECTRIC POWER UNIT FOR INDUCTION HEATING - Reverse conducting type semiconductor switches are arranged in a bride from, an energy storage capacitor is connected with its DC terminal to obtain a magnetic energy regeneration switch, and then an induction coil is connected to its AC terminal. An AC pulse current of variable frequency is obtained by applying a gate signal to the semiconductor switch to thereby turn it ON/OFF; since a voltage is generated automatically by regenerating magnetic energy, a DC power supply is connected to the opposite ends of the capacitor through a smoothing coil, thus injecting power.01-21-2010
20110280053 SMPS HAVING A SAFETY ARRANGEMENT, A METHOD OF OPERATING A SMPS, AND A CONTROLLER THEREFOR - A switched mode power supply (SMPS) is disclosed. The SMPS includes a mechanism for discharging charge stored in an input capacitor, upon the SMPS becoming disconnection from the mains, for instance by being unplugged. The SMPS includes a detector for detecting the disconnection of the mains, and a discharge circuit. The discharge circuit comprises a discharge element. The discharge element may be a part of the SMPS which is used otherwise, for instance, a high-voltage current source, or a bus capacitor or it may be an additional element, for instance a resistance load. The discharge circuit is adapted for, in response to the detector detecting a disconnection of the mains, discharging the input capacitor along a path. The detector controls a switch which engages the discharge circuit upon the detection. The switch forms a part of the discharge path.11-17-2011
20100309699POWER FACTOR CORRECTION CIRCUIT - A power factor correction circuit includes a filter capacitor interposed between AC input terminals, a first inductor interposed between the first end of the filter capacitor and an input of a first rectifying bridge circuit, and a second inductor interposed between the second end of the filter capacitor and another input of the first rectifying bridge circuit. The power factor correction circuit further includes a second rectifying bridge circuit including inputs connected to AC input terminals, and outputs connected to a smoothing capacitor. A control circuit controls switching devices in the first rectifying bridge circuit. The power factor correction circuit can facilitate preventing an overcurrent from flowing through diodes and parasitic diodes in the switching devices, using a simple configuration.12-09-2010
20110141781POWER SUPPLY CONTINUOUS INPUT VOLTAGE EXTENDER - A system and method for providing acceptable output power from a wide range of received power, comprising: outputting a received voltage as an output voltage if the received voltage does not exceed a threshold; and limiting the output voltage to the threshold if the received voltage exceeds the threshold. Limiting the output voltage may comprise dropping an excess voltage across a switching element, wherein the excess voltage is the received voltage minus the threshold.06-16-2011
20080259664NETWORK TRANSMIT/RECEIVE PORT - A network transmit/receive port, including transformers, a rectifying unit, a powered device controller unit, and a DC-DC converter controller, is provided. Each circuit unit is integrated in a network transmit/receive port of an Ethernet power sourcing/powered device, so as to reduce the volume of externally-connected circuits, which thus further satisfies the product design trend of being short, small, light, and thin.10-23-2008
20100259957BRIDGELESS PFC CIRCUIT FOR CRITICAL CONTINUOUS CURRENT MODE AND CONTROLLING METHOD THEREOF - The configurations of a bridgeless PFC circuit and a controlling method thereof are provided. The proposed circuit includes an AC power source, a first and a second bridge arms, each of which has a middle point, wherein the first terminal of the first bridge arm connects the first terminal of the second bridge arm, the second terminal of the first bridge arm connects the second terminal of the second bridge arm, and the middle point of the second bridge arm connects the second terminal of the AC power source, a bidirectional switch module connected to the two middle points, an inductor having a first terminal coupled to the AC power source and a second terminal coupled to the middle point of the first bridge arm and a sensing circuit magnetically coupled to the inductor.10-14-2010
20110286251POWER SUPPLY DEVICE - A power supply device includes: a magneto generator with a rotor having a magnet; a torque supplying device supplying torque to the rotor; a rectifier circuit supplying electric power to a electrical load device by rectifying an output of the magneto generator; a short circuit electrically shorting an output end of the magneto generator; a voltage detection circuit detecting a terminal voltage of the electrical load device; and a control circuit controlling a voltage of the electrical load device to be a first set value by controlling the short circuit to switch ON (short operating mode) and OFF (rectification operating mode) according to the voltage detected by the voltage detection circuit and allowing the short circuit to operate while making a switching between the two operating modes according to a operating state relating to a rotation of the rotor of the magneto generator.11-24-2011
20120099356POWER CONVERSION APPARATUS AND METHOD - According to one embodiment, power conversion apparatus includes a converter and a controller. A converter receives an AC power as an input, and outputs a DC voltage by turning on and off a first switching element which operates when the AC power is positive, and a second switching element which operates when the AC power is negative. A controller receives an AC input voltage and alternating input current to the converter, and a DC output voltage from the converter, as an input, determines a pulse width of a first pulse signal to turn on the first switching element and a pulse width of a second pulse signal to turn on the second switching element, and outputs the first pulse signal and second pulse signal to the converter.04-26-2012
20090323380CYCLO-CONVERTER AND METHODS OF OPERATION - A three phase full resonant cyclo-converter suitable for converting a three phase AC supply to a DC output. In one embodiment the cycloconverter controls switching frequency to control converter output and adjusts phase on times for power factor correction. A switching sequence is employed which provides resonant switching to reduce losses and component ratings. The converter provides high conversion efficiency with a simple power component design.12-31-2009
20110292702METHOD AND APPARATUS TO IMPROVE DYNAMIC RESPONSE OF THE SYNCHRONOUS RECTIFYING FOR RESONANT POWER CONVERTERS - A synchronous rectifying circuit for a switching power converter is provided. The synchronous rectifying circuit includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for rectification. The control circuit generates a drive signal to switch on the power transistor once the diode is forward biased. The control circuit includes a monitor circuit. The monitor circuit generates a monitor signal an off signal to switch off the power transistor in response to a pulse width of the drive signal for generating an off signal to switch off the power transistor. The monitor circuit further reduces the pulse width of the drive signal in response to a change of a feedback signal. The feedback signal is correlated to an output load of the power converter.12-01-2011
20110292703Single-stage AC-to-DC converter with isolation and power factor correction - A new class of Single-Stage AC-DC converters with built-in Isolation and PFC feature is introduced along with the companion hybrid switching conversion method. Several different converter topologies are introduced, which all feature three switches only, single magnetic component and low voltage stresses on all switches.12-01-2011
20110292704SEMICONDUCTOR DEVICE AND POWER SUPPLY DEVICE - A power supply topology is used in which a transistor is provided on the side of an output node of a rectifying circuit. An inductor is provided on the side of a reference node, a resistor is inserted between the transistor and the inductor, and one end of the resistor is coupled to a ground power supply voltage of a PFC circuit. The PFC circuit includes a square circuit which squares a result of multiplication of an input voltage detection signal and feedback information (output voltage of an error amplifier circuit). The PFC circuit drives on the transistor when a detection voltage developed at the resistor reaches zero, and drives off the transistor when the detection signal reaches an output signal of the square circuit.12-01-2011
20100054005RECTIFIER ASSEMBLY - A rotating rectifier includes diode subassemblies that each have an AC contact between two diodes, held in place by a spring clip or interference fit between an inner DC bus and an outer DC bus. The outer DC bus can also act as a housing and heat sink. Diodes and resistors are distributed around the rotating rectifier. Zener diodes can be included in series with the resistors to provide further protection to the diodes to ensure proper operation of the rectifier.03-04-2010
20110007534SOFT SWITCHING POWER ELECTRONIC TRANSFORMER - This patent document discloses power electronic transformers having a high-frequency link. An example apparatus include a transformer having a primary winding and a secondary winding, the transformer is configured to receive a primary power signal having a first frequency, a primary converter configured to selectively oscillate polarity of the primary windings with respect to the secondary windings at a second frequency, the second frequency substantially substantially higher than the first frequency, a secondary converter coupled to the secondary winding, the secondary converter configured to provide a load power signal using a high frequency power signal generated using the secondary winding. The secondary converter can be configured to reduce current flow in the primary winding when the polarity of the primary winding is switched, the reduced current follow is configured to reduce disturbances resulting from leakage inductance of the transformer.01-13-2011
20090290395POWER FACTOR CORRECTION CIRCUIT - A power factor correction circuit includes a first rectifier to rectify an AC voltage, a series circuit connected to an output of the first rectifier and including a step-up reactor and a switching element, a rectifying-smoothing circuit connected to both ends of the switching element and including a second rectifier and a smoothing capacitor, an input voltage detector to detect an output voltage of the first rectifier, an output voltage detector to detect a voltage across the smoothing capacitor, an error amplifier to amplify an error between the output voltage signal and a reference voltage, and a controller to determine an ON/OFF duty ratio of the switching element according to the amplified error signal and a result of a calculation carried out on the input voltage signal and output voltage signal.11-26-2009
20090122584Energy Distributing Circuit Arrangement, Including a DC/DC-Converter - The present invention relates to a current distributing circuit arrangement (05-14-2009
20100118576POWER FACTOR CORRECTION CIRCUIT - A power factor correction circuit includes a rectifier 05-13-2010
20100118574DC BUS REGULATOR - An improved DC bus regulator that utilizes more transistor packs for power conversion at some times and diode, SCR, and resistor packs at other times. The conversion technology is selected by the regulator based on the current load capacity and response required. For example, transistor packs may be used in low power load conditions. Through use of this hybrid system, the system obtains the desirable effects of transistor pack systems including fast response time, ability to regulate current, and bi-directional power conversion while mitigating the high costs and fragile nature of a system based solely on transistor packs.05-13-2010
20090310393Motion Activated Amplifier - An electronic device that includes a motion activated amplifier structured to receive a first DC signal having a first DC voltage level and output a second DC signal having a second DC voltage level that is greater than the first DC voltage level. The motion activated amplifier includes a motion activated switch operatively coupled to transformer/rectifier circuitry, wherein the motion activated switch is structured to receive the first DC signal and in response to being moved output an AC signal, and wherein the transformer/rectifier circuitry is structured to receive the AC signal and convert the AC signal into the second DC signal.12-17-2009
20090310392 POWER CONVERTER - This invention relates to a power converter for use in ACDC power supplies and in particular to a power converter comprising a converter input, a converter output and an output synchronous rectification stage, the output synchronous rectification stage comprises a plurality of switching devices, an output inductor and an output capacitor. According to the invention the output inductor is provided by way of a tapped inductor and there is provided an output reverse recovery device, connected to the tapped inductor to provide an alternative path for the flow of current in the freewheeling period of the output synchronous rectification stage. In this way, the functionality of the power converter, particularly at higher frequencies is enhanced.12-17-2009
20110038190CONTROLLED CONTACTLESS POWER TRANSMISSION - An inductive coupled power transmission circuit has a rotating transformer, including an AC voltage supply for feeding an AC voltage via a series capacitor into the primary winding of said rotating transformer and a load being coupled to the secondary winding of said rotating transformer. The AC voltage supply includes a line rectifier for receiving AC voltage from a power line and generating a DC voltage. This is fed into a DC/DC converter for converting the DC voltage from the line rectifier into a controlled intermediate DC voltage. An AC generator generates an AC voltage from the intermediate DC voltage and feeds this via a matching transformer into the primary winding of the rotating transformer. A measuring circuit measures voltages and/or currents within the AC voltage supply and a function generator estimates voltage and/or current values at the load based on the measured values and controls the DC/DC converter and/or the AC generator based on the estimated values.02-17-2011
20100118573METHOD AND APPARATUS TO INCREASE EFFICIENCY IN A POWER FACTOR CORRECTION CIRCUIT - A controller for use in a power factor correction (PFC) converter includes a power factor correction controller circuit coupled to output a drive signal to switch a power switch between an on state and an off state to transfer energy to an output of the PFC converter. The controller also includes an switching frequency adjuster coupled to output a frequency adjust signal to the power factor correction controller circuit to adjust an average switching frequency of the power switch in response to a load signal representative of a load coupled to the output of the PFC converter, wherein the frequency adjust signal is responsive to a range of load conditions.05-13-2010
20090310394DIRECT-CURRENT POWER SUPPLY APPARATUS - First and second rectification circuits are connected to a commercial AC power supply by a reactor. A load is connected between the output terminal on the positive side of the first rectification circuit and the output terminal on the negative side of the second rectification circuit. While the voltage or the commercial AC power supply remains at the positive level, a current flows through a path constituted by one of the diodes of the first rectification circuit and one of the diodes of the second rectification circuit. While the voltage of the commercial AC power supply remains at the negative level, too, a current flows through the path constituted by one of the diodes of the first rectification circuit and one of the diodes of the second rectification circuit.12-17-2009
20090219738Power supply device, in particular for redundant operation with a plurality of further power supply devices connected in parallel on the output side - A power supply device has an input for an AC input voltage or for a DC input voltage and an output for a load-dependent DC output voltage electrically isolated therefrom. A step-up converter is connected to the input side, a charging coil, a first switching element, a freewheeling diode, a charging capacitor and means for regulating the voltage of a converter DC input voltage are provided on the output side at the step-up converter unit by a pulse-width-modulated activation of the first switching element. The power supply device has a switched-mode DC/DC converter connected to the step-up converter unit, a second switching element with a transformer for electrical isolation, and means for closed-loop controlled predefined, load-dependent voltage reduction of the DC output voltage by pulse-width-modulated activation. The second switching element is controlled by a constant converter pulse duty factor. The first switching element is controlled by a converter pulse duty factor such that the converter DC input voltage decreases with increasing load.09-03-2009
20120294054METHOD AND APPARATUS FOR WIRELESS POWER TRANSMISSION USING POWER RECEIVER - A rectifier is provided. The rectifier includes a first rectification unit having an anode connecting to a negative radio frequency (RF) port and a cathode connecting to a positive direct current (DC) port, a second rectification unit having an anode connecting to a positive RF port and a cathode connecting to the positive DC port, a third rectification unit having an anode connecting to a ground and a cathode connecting to the negative RF port, and a fourth rectification unit having an anode connecting to the ground and a cathode connecting to the positive RF port. The first rectification unit includes a plurality of first diodes that are connected in parallel, and the second rectification unit includes a plurality of second diodes that are connected in parallel.11-22-2012
20090185404Regenerative Building Block and Diode Bridge Rectifier and Methods - A rectifier building block has four electrodes: source, drain, gate and probe. The main current flows between the source and drain electrodes. The gate voltage controls the conductivity of a narrow channel under a MOS gate and can switch the RBB between OFF and ON states. Used in pairs, the RBB can be configured as a three terminal half-bridge rectifier which exhibits better than ideal diode performance, similar to synchronous rectifiers but without the need for control circuits. N-type and P-type pairs can be configured as a full bridge rectifier. Other combinations are possible to create a variety of devices.07-23-2009
20120106216AC-DC CONVERTER WITH UNITY POWER FACTOR - A method for construction of voltage or current power sources receiving an AC input, the power sources based on inclusion of a buffer stage feeding a converter operating with an output driver to a load. The buffer stage includes a buffer capacitance and a control means, such that the consumed input current from the AC input is proportional to the AC input voltage to the power source. The buffer capacitance functions as a charge buffer, enabling maintenance of the consumed input current over the entire period of the AC input voltage, and acting to separate the load from the consumed input current.05-03-2012
20090290394Method for Supplying and Discharging Power to and From a Resistive-Inductive Load, and Rectifier used therein - Power is supplied to excitation windings in order to generate magnetic fields, preferably for activating superconducting coils. An AC transformer is used, and triggering of the coil is performed via a rectifier having little power loss. Preferably, a two-way rectifier using a freewheeling circuit is utilized in the associate device, thus preventing losses when power is supplied and especially when the power is discharged.11-26-2009
20090279334ELECTRONIC DEVICE AND SWITCHING POWER SUPPLY THEREOF - A switching power supply includes a rectifier circuit, a converter, a detecting unit, a control unit, a switching unit, and a protection unit. The rectifier circuit is used for rectifying an input voltage into a first direct current voltage. The converter is configured for generating a first current according to the first direct current voltage. The detecting unit is used for generating a detected voltage according to the first current. The control unit is configured for generating a control signal. The switching unit is used for enabling the converter, and conducting the first current to the detecting unit when receiving the control signal. The protection unit is configured for shunting the first current with the detecting unit when the first current becomes a large current surge. The control unit stops generating the control signal when determining that the detected voltage is equal to or higher than a predetermined value.11-12-2009
20090285001CONTROL CIRCUITS AND METHODS FOR CONTROLLING SWITCHING DEVICES - A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.11-19-2009
20090296440SINGLE-STAGE AC TO DC CONVERSION DEVICE - A single-stage AC to DC conversion device includes an energy storage unit, a magnetic unit, and a switch unit. The magnetic unit electrically connects the energy storage unit with the switch unit, and has a core, a first winding, a second winding, a third winding, and at least one output winding. The first winding couples with the core and transfers a first electric energy to the core. The second winding couples with the core and stores a second electric energy in the energy storage unit. The third winding couples with the core and transfers the second electric energy to the core. The output winding couples with the core that transfers the first electric energy and the second electric energy, and outputs a third electric energy through the output winding.12-03-2009
20110205772Power Factor Corrected Switched Mode Power Supply - A power factor corrected switched mode power supply including a phase shifter that senses the mains frequency and phase shifts it to produce a phase shifted signal which modulates the switching signal supplied to the switches based on the phase shifted signal. The rate of change of the frequency of the switching signal may be controlled to be greatest in regions of greatest power transfer.08-25-2011
20100103708POWER SUPPLY SAVING SYSTEM FOR AN ELECTRONIC DEVICE - A power supply saving system includes a power input interface, a power output interface, an alternating current/direct current (AC/DC) converter, a relay, a relay driving circuit, a trigger, and a timing sequence circuit. The AC/DC converter is capable of transforming the AC power signal to direct current (DC) power to supply to the relay, the relay driving circuit, the trigger, and the timing sequence circuit. The timing sequence circuit is capable of controlling the relay driving circuit via the trigger to turn on the relay to connect the power input interface to the power output interface when the timing sequence circuit receives a power-on signal. The timing sequence circuit is capable of controlling the relay driving circuit via the trigger to turn off the relay to cut off connection between the power input interface and the power output interface when the timing sequence circuit receives a power-off signal.04-29-2010
20100061128ELECTRIC POWER SUPPLY CIRCUIT - An electric power supply circuit includes a switching element (S) for causing a short-circuit for output power of a diode bridge circuit (03-11-2010
20120170337VOLTAGE MULTIPLICATION IN A WIRELESS RECEIVER - A wireless energy transfer receiver includes an input configured to receive alternating current (AC) electric energy and an output configured to make available direct current (DC) electric energy. The receiver further includes a rectification component configured to convert the AC energy received at the input into DC energy available at the output, the DC energy made available as DC voltage; and a multiplication component configured to amplify a peak voltage of the AC energy received at the input, the DC voltage made available at the output correspondingly being higher than the peak voltage of the AC energy received at the input.07-05-2012
20110205771CLOSED-LOOP CONTROL METHOD FOR AN HVDC TRANSFER INSTALLATION HAVING A DC VOLTAGE INTERMEDIATE CIRCUIT AND SELF-COMMUTATED CONVERTERS - A closed-loop control method for at least two converters in an energy transmission and/or distribution system. The converters may be controlled either as rectifier or inverter and they are connected to each other by a DC link. A measured DC voltage and a measured DC current is measured at each converter and transmitted to a rectifier regulator for regulating the corresponding rectifier or to an inverter regulator for regulating the corresponding inverter. Each rectifier regulator and each inverter regulator gives the difference between a given set DC voltage and the relevant received measured DC voltage to give a differential DC voltage and the difference between a set DC current and the corresponding received measured DC current to give a differential DC current. The measured DC current, the measured DC voltage, the set DC current and the set DC voltage are normalized with which a regulation of inverters formed of switchable power semiconductors connected by a DC link can be carried out, wherein the proviso of set currents being zero is possible. Each converter is a self-commutated converter with power semiconductors and the rectifier regulation of the provided converter is regulated such that the sum of the product of the differential voltages and the value of given set DC current at the corresponding rectifier and the differential current is a minimum and the inverter regulation regulates the corresponding inverter such that the sum between the differential voltage and the differential current is a minimum.08-25-2011
20080304300Power conversion system with galvanically isolated high frequency link - A power conversion system has a three-phase AC input, where each AC input phase is linked to a string of cascaded single-phase AC-DC converters placed in series with a three-phase AC-DC converter. Each single-phase AC-DC converter in one embodiment includes a silicon carbide (SiC) pulse width modulated MOSFET H-bridge that placed in series with the three-phase AC-DC converter that includes a silicon (Si) SCR bridge. The single-phase AC-DC converters and the three-phase AC-DC converter together in one embodiment include a mixed silicon-carbide (SiC) and silicon (Si) device topology.12-11-2008
20080205108Power Converter Apparatus - The present invention provides a power converter apparatus which reduces power loss in a diode bridge element in order to achieve energy saving. The power converter apparatus is equipped with two diode bridge elements, and reduces power loss in respective diodes by connecting two input terminals of the one diode bridge element to one AC input terminal of the power converter apparatus, connecting two input terminals of the another diode bridge element to another AC input terminal, connecting a positive pole output terminal to respective positive pole output terminals of the two diode bridge elements and a positive electrode terminal of a capacitor, and connecting a negative pole output terminal to respective negative pole output terminals of the two diode bridge elements, and a negative electrode terminal of the capacitor.08-28-2008
20100277960AIRCRAFT POWER SUPPLY AND METHOD OF OPERATING THE SAME - An aircraft power supply for providing DC power with improved power quality characteristics. The aircraft power supply includes a transformer control system that can use closed-loop feedback from a DC power output to control switches that can short primary windings turns of a step-down transformer. By shorting turns in the primary, the transformer control system can control or manipulate the turns ratio in the transformer and compensate for decreases in the DC power output.11-04-2010
20120033471TWO-WIRE DIMMER SWITCH FOR LOW-POWER LOADS - A two-wire load control device (such as, a dimmer switch) for controlling the amount of power delivered from an AC power source to an electrical load (such as, a high-efficiency lighting load) includes a thyristor coupled between the source and the load, a gate coupling circuit coupled between a first main load terminal and the gate of the thyristor, and a control circuit coupled to a control input of the gate coupling circuit. The control circuit generates a drive voltage for causing the gate coupling circuit to conduct a gate current to thus render the thyristor conductive at a firing time during a half cycle of the AC power source, and to allow the gate coupling circuit to conduct the gate current at any time from the firing time through approximately the remainder of the half cycle, where the gate coupling circuit conducts approximately no net average current to render and maintain the thyristor conductive.02-09-2012
20120287689SYNCHRONOUS RECTIFIER DISABLING ARRANGEMENT - A power supply receives an alternating current input that is rectified by a rectifier. The rectified output voltage is coupled to a load and a microprocessor during both a run mode operation and a standby mode operation. The rectifier provides synchronous rectification by an included MOSFET, during the run mode operation and non-synchronous rectification during the standby mode operation by an included Schottky diode. The Schottky diode in rectifier is in parallel with the MOSFET and provides rectification during the standby mode operation. A source of an on/off control signal from the microprocessor is applied to the load for changing the operation mode and applied, in parallel, to the rectifier for disabling the synchronous rectification in the rectifier, during the standby mode operation. The efficiency of the power supply is improved in the standby mode operation by elimination of the power consumed to energize a synchronous rectifier controller. The efficiency of the power supply is also improved in the standby mode operation by using the on/off control signal from the microprocessor to disable the synchronous operation.11-15-2012
20110007535METHOD AND APPARATUS FOR CONVERTING AC POWER TO DC POWER - A method and apparatus for converting AC power to DC power with increased efficiency. One embodiment of the method adjusts the switching frequency of the AC to DC converter base on the load. Another embodiment of the method optimizes the output boost voltage of the AC to DC converter.01-13-2011
20110007533POWER FACTOR CORRECTION CIRCUIT - A power factor correction circuit includes reactors L01-13-2011
20100271851SELF-BOOTSTRAPPING FIELD EFFECT DIODE STRUCTURES AND METHODS - A two terminal device which can be used for the rectification of the current. Internally it has a regenerative coupling between MOS gates of opposite type and probe regions. This regenerative coupling allows to achieve performance better than that of ideal diode.10-28-2010
20080316784ISOLATED RADIATION HARDENED ELECTRONICS ON/OFF CONTROL CIRCUIT - An isolated ground on/off control circuit includes a first transformer amplifying an AC input voltage, a second transformer connected in parallel to the first transformer; and output circuitry that rectifies the AC input voltage to an isolated DC output voltage. The on/off control circuit may provide improved redundant operation by utilizing a first and a second transformer in parallel and dual diodes for rectification. An on/off command transformer may be designed to have the smallest manufacturable package size and to meet aerospace requirements. The on/off control circuit and method for providing an isolated on/off command to an electronic device as in one embodiment of the present invention may be suitable for, but not limited to, applications in the aircraft and aerospace industries, such as applications in electronic equipments of spacecraft.12-25-2008
20080316785POWER SOURCE APPARATUS - A power source apparatus has a series circuit connected between output terminals of a DC power source, the series circuit including a primary winding of a transformer and a switching element; a controller configured to control an ON/OFF operation of the switching element; and an output diode connected between terminals of a second winding of the transformer and configured to rectify an alternating current that is induced on the secondary winding when the controller turns on/off the switching element. The output diode includes a plurality of diodes that are connected in parallel with one another and are made of wide-gap semiconductor.12-25-2008
20120069615BRIDGELESS POWER FACTOR CORRECTION CONVERTER - A bridgeless power factor correction converter is configured such that a gate driver controls the ON ratio of a booster converter switch so that the ON ratio is gradually increased from 0, i.e., performs soft start control, every time the voltage polarity of an AC input in a totem-pole bridgeless power factor converter (TPBL converter is inverted) is inverted.03-22-2012
20090185402 STANDBY CIRCUIT WITH SUPER LOW POWER CONSUMPTION - The present invention relates to a circuit minimizing standby power in a power adapter with a power-frequency transformer (T07-23-2009
20130121050INTEGRATED MAGNETIC DEVICE FOR LOW HARMONICS THREE-PHASE FRONT-END - An integrated magnetic for a low harmonics three-phase bidirectional front-end and also for AC/DC and DC/AC power converters. Its use enables reduction of the harmonics of the currents absorbed or injected to three-phase power line by using only one device which integrates a splitter and an inductor function. Compared to known solutions, cost, material and dimensions of the integrated magnetic device are reduced thanks to the magnetic core comprising three closed sub-assemblies and one or more jokes, separated by air-gaps from the sub-assemblies.05-16-2013
20090201707POWER SUPPLY - A power supply is provided. The power supply comprises: a power input unit switching an input power; a transformer unit inducing an output power of the power input unit to a secondary side; a first power output unit connected to a first coil of the secondary side of the transformer unit; a second power output unit connected to a part of the first coil of the secondary side of the transformer unit; a synchronization signal detecting unit connected to a third coil of the secondary side of the transformer unit and detecting a switching period of the power input unit; and a synchronization signal output unit controlling an operation of the second power output unit according to the detected signal of the synchronization signal detecting unit.08-13-2009
20080310203METHOD AND APPARATUS TO PROVIDE SYNCHRONOUS RECTIFYING CIRCUIT FOR OFFLINE POWER CONVERTERS - A synchronous rectifying circuit is provided for power converter. A pulse signal generator is utilized to generate a pulse signal in response to the leading edge and the trailing edge of a switching signal. The switching signal is used for switching the transformer of the power converter. An isolation device such as pulse transformer or small capacitors is coupled to the pulse signal generator for transferring the pulse signal through an isolation barrier of a transformer. A synchronous rectifier includes a power switch and a control circuit. The power switch is equipped in between the secondary side of the transformer and the output of the power converter for the rectifying. The control circuit having a latch is operated to receive the pulse signal for turning on/off the power switch.12-18-2008
20100149845DIGITALLY CONTROLLED SWITCHED-MODE POWER SUPPLY - The present invention relates to a digitally controlled switched-mode power supply, which achieves the effectiveness to save on power and enable more accurate voltage through control of a digital circuit, The power supply is provided with a control circuit, and the control circuit primarily includes a digital unit and a switching controller, wherein functionality of the digital unit enables transmitting an input voltage signal to the switching controller, and when the switching controller transmits voltage to the digital unit, then the digital unit is able to feed a signal back to control the switching controller. Accordingly, the digital unit is able to accurately sense the input load voltage at all times, and thereby achieve advancement to enable saving on power and more accurate voltage.06-17-2010
20100220507Microcontroller operated current limited switching power supply for circuit protective devices - An AC to DC power supply for small heat sensitive electronic device. The power supply being dynamically controlled to operate symmetrically about the lowest point of the AC source voltage waveform for minimum excess heat production.09-02-2010
20100226156POWER SUPPLY WITH INTEGRATED LINEAR HIGH VOLTAGE MULTIPLIER AND CAPACITORS THEREFOR - A high voltage power supply for use in small diameter spaces such as in oil well logging devices includes an AC voltage source which provides an AC voltage to a voltage multiplier circuit that converts the AC voltage to a high DC voltage. A parallel or combination parallel-series multiplication circuit is used, rather than a series multiplication circuit, to reduce the reverse voltage across each semiconductor rectifier in the multiplication circuit. The lower reverse voltage reduces leakage currents allowing such circuits to operate at temperatures over 150 degrees C. A special construction of high voltage capacitors allows the power supply to fit small spaces. A piece of elongate conductive material, such as a metal cylinder, forms a common capacitor electrode and is coated with a high voltage dielectric. Separate individual capacitor electrodes are formed around the common electrode and dielectric.09-09-2010
20130215656LATCHING COMPARATOR - A latching comparator includes a switching logic circuit coupled to receive a latching signal, a first signal and a second signal. An output circuit having an input terminal is coupled to the switching logic circuit. The input terminal of the output circuit is coupled to receive both the first and second signals through the switching logic circuit in response to the latching signal being in a first state. The input terminal of the output circuit is coupled to receive only one of the first and second signals through the switching logic circuit in response to a signal representative of an output terminal of the output circuit and in response to the latching signal being in a second state.08-22-2013
20100246226TRANSITION MODE POWER FACTOR CORRECTION DEVICE WITH BUILT-IN AUTOMATIC TOTAL HARMONIC DISTORTION REDUCTION FEATURE - The present invention relates to controller for reducing the harmonics contents in the AC-to-DC converter. The controller, capable of minimizing THD due to crossover distortion, comprises: a THD Reducer for setting an appropriate offset voltage to for THD reduction; an Error Amplifier for generating an output voltage error signal corresponding to a deviation in the output voltage of the power supply unit from a predetermined reference voltage; Multiplier for combining the divided down rectified signal with the output voltage error signal to generate a sinusoidal reference signal; Comparator for generating a logic signal for setting the Power NMOS on period by comparing the received current sense signal with the summation of offset voltage from THD Reducer and output of Multiplier; Zero Crossing Detector (ZCD) for generating an edge logic signal to turn on Power NMOS, RS Flip-Flop Register and Gate Driver combined to create required analog waveform pattern for driving Power NMOS and thereby approximating the shape of the current running through boost inductor to the sinusoidal waveform of the rectified line input voltage and in the meantime to keep the valley of rectified sinusoidal waveform line voltage close to local ground value.09-30-2010
20100238691AC-TO-DC POWER SUPPLY CIRCUIT - An AC-to-DC power supply circuit has an AC capacitor, a half-wave rectifier, and a filter capacitor. Through the AC capacitor, the half-wave rectifier forms a power supply circuit with an AC power supply for converting AC power to half-wave DC power. The filer circuit further converts the half-wave DC power into low-voltage DC power. The AC-to-DC power supply circuit adjusts the ratio of the AC capacitor and the filter capacitor so that the capacitance ratio matches with the voltage ratio of the half-wave DC power and the lower-voltage DC power. As a consequence, the AC-to-DC power supply circuit does not need to use a large-size transformer and can still effectively convert AC power to low-voltage DC power. This can largely reduce the manufacturing cost.09-23-2010
20120195083CURRENT DIRECTION DETECTION MODULE - The invention discloses a current direction detection module including a conversion unit, a bridge unit and an operation unit. The conversion unit has primary and secondary sides, wherein the secondary side has first and second ends. The bridge unit has first, second, third and fourth rectifying elements and first, second, third and fourth nodes. Each rectifying element has an anode and a cathode. The anode of the first rectifying element is coupled to the fourth rectifying element. The anode of the second rectifying element is coupled to the first rectifying element. The anode of the third rectifying element is coupled to the second rectifying element. The anode of the fourth rectifying element is coupled to the third rectifying element. The first and second nodes are coupled to the first and second ends. The operation unit amplifies two bridge voltages at the third and fourth nodes and outputs an operation voltage.08-02-2012
20120127765CONTACTLESS POWER TRANSFER SYSTEM AND CONTROL METHOD THEREOF - A contactless power transfer system, including a coil configured to supply or receive power contactlessly via magnetic coupling, a bridge circuit having two direct current (DC) terminals and two alternating current (AC) terminals, and a smoothing capacitor connected between the DC terminals. A load is connectable to either end of the smoothing capacitor. One of the AC terminals is connected to one end of the coil via a first capacitor. The other of the AC terminals is connected to the other end of the coil. The bridge circuit includes two serially-connected circuits each having upper and lower arms, each arm having a semiconductor switch and a diode in reverse parallel connection. A second capacitor is connected in parallel to the semiconductor switch of an upper arm, or of a lower arm, or to two semiconductor switches respectively of an upper arm and of a lower arms, of the bridge circuit.05-24-2012
20120140537ACTIVE RECTIFICATION CONTROL - An active rectification system includes an active rectifier, a pulse width modulation (PWM) control, and a closed loop vector control. The PWM control portion is configured to control switching of the active rectifier and the closed loop vector control is configured to generate the required duty cycles for the PWM signals that regulate the DC voltage output and force a three-phase current input of the active rectifier to align with a three-phase pole voltage input of the active rectifier.06-07-2012
20110032738SYSTEM AND METHOD FOR POWER FACTOR CORRECTION - A first rectifier diode is electrically connected between a first input terminal where an alternating current (AC) power is received and a first output terminal where a direct current (DC) power is output. A second rectifier diode is electrically connected between the first input terminal and a second output terminal. The first and second rectifier diodes rectify first and second portions of the AC power into the DC power, respectively. When switching of a plurality of power factor correction (PFC) switches is enabled, the plurality of PFC switches increases a voltage of the DC power to greater than a peak voltage of the AC power. An inductor is electrically connected between a second input terminal and two of the plurality of PFC switches. When the switching is disabled, first and second bypass diodes provide a current path past the plurality of PFC switches and the inductor.02-10-2011
20130128638SYSTEMS, METHODS, AND APPARATUS FOR A HIGH POWER FACTOR SINGLE PHASE RECTIFIER - Systems, methods and apparatus are disclosed for broadband AC to DC conversion. In one aspect, a power conversion apparatus for providing direct current (DC) based at least in part on an alternating current is provided. The power conversion apparatus includes a first rectifier circuit configured to rectify the alternating current to a first direct current. The power conversion apparatus further includes an averaging circuit configured to average the first direct current received from the first rectifier circuit and to provide a second direct current. The power conversion apparatus further includes a second rectifier circuit configured to rectify the alternating current to a third direct current. The direct current is derived from the second direct current and the third direct current.05-23-2013
20090109716Method and Apparatus for Supplying and Switching Power - An exemplary embodiment of an apparatus for supplying and switching power may include a power source, a transformer, a full bridge rectifier and a control switch. The transformer has a first winding and a second winding, the first winding being connected to the power source, the second winding having a first tap and a second tap, with the first tap being connected to a first load output. The full bridge rectifier includes four nodes, the first being connected to the second tap of the second winding, the second being connected to a second load output, the third being connected to a reference voltage source. The control switch is connected between a fourth of the four nodes and the reference voltage source.04-30-2009
20090109717POWER FACTOR CORRECTED CIRCUIT HAVING INTEGRATED COIL - There is provided a power factor corrected circuit having an integrated coil in which a plurality of inductors that have been separately used for circuits are wound around one core. The power factor corrected circuit includes a rectifying unit for rectifying a common AC power supply; a coil unit for controlling the change in electric current of the rectified power supply from the rectifying unit according to the switching operation; and a switching unit for complementarily switching the power supply from the coil unit, wherein the coil unit has a core including first and second coils electrically coupled to each other; and first, second and third legs magnetically coupled to each other, and the first coil is wound around the first leg, the second coil is wound around the second leg, and the third leg is combined with the first and the second leg to form magnetic flux paths, respectively.04-30-2009
20120188810RECTIFIER SYSTEM - A rectifier system, e.g., for a generator, includes a bridge system having a predefined number of rectifier elements, at least one rectifier element being a rectifier element having at least one reverse-voltage dependent characteristic curve in a predefined range, and one of the negative diodes having a higher reverse saturation current than the associated positive diode, and at least one of the negative diodes being placed at a location in the rectifier in which the temperature is increased.07-26-2012
20130135911AC-DC CONVERTER - An alternating current to direct current (AC-DC) converter is provided. The converter includes a rectifying unit configured to rectify an AC voltage that is being input, a boost converter unit connected to the rectifying unit and provided with a single inductor, a first switch, and a second switch formed thereto, a smoothing unit configured to smooth the voltage passing through the boost converter unit, and a control unit configured to control an ON/OFF of the first switch and the second switch such that the boost converter unit is operated as a power factor correction circuit or as an inrush current limiting circuit, so that the inrush current is stably controlled by reducing additional circuit structures configured for limiting an inrush current.05-30-2013
20100302822Flyback Power converters - Designs of flyback power converters are described. According to one aspect of the designs, a power converter includes a primary side including a primary winding of a transformer coupled to an input voltage and a primary switch for switching on or off the primary winding, a secondary side including a secondary winding of the transformer for generating an output voltage, and a loop controller configured to sample a feedback voltage representative of the output voltage, generate a gate signal with a fixed falling edge and an adjustable rising edge to drive the primary switch, and adjust a duty cycle of the gate signal by adjusting the rising edge of the gate signal until the feedback voltage converges to a reference voltage.12-02-2010
20100302820Inverter drive power supply circuit - An inverter drive power supply circuit for driving a plurality of inverter switching devices that form an inverter circuit, includes a number N of transformers (N is an integer equal to or larger than 2) adapted to a push-pull method, each having a first winding and a second winding for a primary winding and a first winding and a second winding for a secondary winding, and supplying an output voltage of the secondary winding to the inverter switching devices.12-02-2010
20110110134Saving energy mode (SEM) for an interleaved power factor correction (PFC) converter - A method of controlling a power factor correction (PFC) converter having a first PFC sub-circuit and a second PFC sub-circuit determines when to transition the PFC converter between an interleaved mode and a saving energy mode (SEM). The method includes generating an amplified error signal based on a monitored output voltage of the PFC converter. The second PFC sub-circuit is disabled in response to the amplified error signal being less than a first threshold value and enabled in response to the amplified error signal exceeding a second threshold value.05-12-2011
20100321967REGULATED OUTPUT CURRENT AND SLOPE CONTROL - The present invention is directed to current mode output control with a current mode (CM) region of the high voltage output curve (VI) slope controlled by component selection and arrangement in the construction of high voltage power supplies. The controlled CM current slope output, the tapped multiplier feedback network, and the subsequent output voltage correction network, yields a power supply with the desired VM and CM output characteristics that is significantly less expensive to construct and more efficient than a power supply built using conventional construction techniques.12-23-2010
20110242863PATCH ANTENNA AND RECTENNA USING THE SAME - A patch antenna for receiving high frequency wireless signal and a rectenna using the same, more particularly, an impedance-matched patch antenna adopting a slot capacitive coupling structure and a rectenna capable of generating electrical energy from the wireless signals having different frequency band. A rectenna for receiving an A.C. wireless signal carrying electrical energy and converting the wireless signal into a D.C. electrical energy, is comprised of: a patch antenna for receiving the wireless signal comprising an dielectric substrate, a patch that is formed at the upper area of the surface of the dielectric substrate and providing the first frequency response characteristics, a ground plane formed on the other surface of the dielectric substrate, and an impedance matching means providing the second frequency response characteristics; and a rectifying unit that converts the wireless signal, received via the patch antenna, into a D.C. electrical energy by rectifying the wireless signal.10-06-2011
20090185403Controller for Electrically Adjustable Furniture - A controller for electrically adjustable furniture includes a main-voltage area and a low-voltage area that are electrically isolated from one another. A rectifying power supply unit, which is located in the main-voltage area, serves to generate a rectified voltage available at power supply terminals from an alternating main voltage. The rectified voltage present at the power supply terminals can be delivered to a first motor terminal located in the main-voltage area depending on a first control signal. The controller furthermore includes a first control unit that is located in the main-voltage area and which incorporates an operating terminal and a first control output for the supply of a first control signal. An operating unit located in the low-voltage area is connected via an electrically isolating coupling to the operating terminal.07-23-2009
20090067208METHOD AND APPARATUS FOR PROVIDING POWER - An apparatus includes a first converter module, a second converter module, and a sensor module. The first converter module converts a wireless power associated with an electromagnetic wave to a first DC voltage. The first converter module can include, for example, a Villiard cascade voltage multiplier, a precision rectifier, or a full-wave bridge rectifier. The sensor module monitors the first DC voltage. The second converter module converts the first DC voltage to a second DC voltage that is larger than the first DC voltage. The second converter module is enabled by the sensor module when the first DC voltage is above a first threshold voltage. The second converter module is disabled by the sensor module when the first DC voltage is below a second threshold voltage that is lower than the first threshold voltage. The second converter module provides power to a load based on the second DC voltage.03-12-2009
20090067207Secondary-side power receiving circuit of noncontact power supplying equipment - A plurality of pickup coils 03-12-2009
20110019452AC-DC CONVERTER AND COMPRESSOR DRIVING APPARATUS AND AIR CONDITIONING APPARATUS USING THE SAME - An AC-DC converter is provided which suppresses a harmonic current and improves power factor at low cost. Such an AC-DC converter includes a rectifier connected to an AC power supply via a reactor, capacitors connected in series across the output terminals of the rectifier, a first bidirectional switch having one end connected to one input terminal of the rectifier and the other end connected to a connecting point of capacitors, a second bidirectional switch having one end connected to the other input terminal of the rectifier and the other end connected to the other end of the first bidirectional switch, and a control circuit for actuating the first and second bidirectional switches during a half cycle of the AC power supply so as to control a voltage inputted to the rectifier to a desired output voltage.01-27-2011
20120230074ELECTRICAL ISOLATORS - Disclosed is an electrical isolator circuit comprising an input stage comprising first and second inputs, the input stage being configured to receive an input voltage signal; an output stage comprising first and second outputs electrically connected across a load capacitor; and a DC isolator comprising a first capacitor between said first input and said first output and second capacitor between said second input and said second output. The first and second plates of each of the first, second and load capacitors are defined by conductive layers of a printed circuit board and the dielectric of each of the first, second and load capacitors are defined by a non-conducting part of the printed circuit board.09-13-2012
20110026284Power Factor Control Systems and Methods - A boost converter comprises an inductance that receives an input signal. A switch controls current supplied by the inductance to a load. A power factor control module comprises a mode control module that selects an operating mode of the boost converter and a switch control module that switches the switch at a frequency. The frequency is equal to a first frequency when the mode control module selects a continuous mode and equal to a second frequency when the mode control module selects a discontinuous mode. The first frequency is greater than the second frequency.02-03-2011
20110116292INTEGRATED MULTI-INDUCTOR MAGNETIC MEMBER AND MULTI-LOOP POWER FACTOR CORRECTION CIRCUIT HAVING SAME - A multi-loop power factor correction circuit includes a first rectifier circuit, an integrated multi-inductor magnetic member, plural switching circuits, plural rectifying elements, and a power factor correction controlling circuit. The integrated multi-inductor magnetic member includes a first slab, a second slab, a middle post, plural lateral posts, and plural winding coil assemblies. The winding coil assemblies are wound around respective lateral posts to form at least a first inductor and a second inductor. The magnetic flux cross-section area of the middle post is smaller than the sum of the magnetic flux cross-section areas of the lateral posts. The switching circuits are alternately conducted, so that the distribution of an input AC current is similar to the waveform of the input AC voltage.05-19-2011
20100142238METHOD AND DEVICE IN FREQUENCY CONVERTER - A method in connection with a frequency converter for correcting the power factor of the frequency converter, and a power factor correction unit. The method includes connecting the power factor correction unit between a rectifier bridge of the frequency converter and the supplying AC voltage network, generating with the power factor correction unit DC voltage from the AC voltage of the supply network and feeding the generated DC voltage to the frequency converter via the rectifier bridge of the frequency converter.06-10-2010
20100039842POWER CONVERSION SYSTEM AND POWER CONVERSION METHOD THEREOF - A power conversion system and a power conversion method thereof. The power conversion system includes a driving unit, a control unit, a first direct current (DC) power supply circuit and a second DC power supply circuit. The control unit controls the driving unit to drive a load. The first DC power supply circuit converts an alternating current (AC) power into a first DC power outputted to the driving unit, and the second DC power supply circuit converts the AC power into a second DC power outputted to the control unit.02-18-2010
20100054006CONTROLLING TRANSIENT RESPONSE OF A POWER SUPPLY - A method and apparatus is provided to, among other things, supply power to a load under various load conditions. Output voltage transient responses of the system, such as may be caused by transients changes in the load conditions, may be controlled through current transformation on the output in order to correct or impede over-voltage conditions of the transient response.03-04-2010
20110075458AC-DC Switching Power Converters With Frequency Variation in Response to Load Changes - A method of operating a switching power converter having at least one power switch controlled by a drive signal having a switching frequency is disclosed. The method includes monitoring an output power of the switching power converter, determining whether the output power has decreased below a threshold level and, in response to the output power decreasing below the threshold level, changing the switching frequency of the drive signal from a first switching frequency to a second switching frequency when an operating condition of the switching power converter is satisfied. Also disclosed are controllers and switching power converters (including PFC converters).03-31-2011
20090213630Current-transformed power source connecting circuit device - A current-transformed power source connecting circuit device comprises a power source plug-in, in connection with an external power source; a current transformer, having a primary and a secondary windings, the primary winding of which is connected in series to a current path of the power source plug-in for detection of a current; a main socket, capable of connecting externally to a main electrical apparatus, one end of which is connected to the current transformer; a rectifying means, in connection with the secondary winding of the current transformer, for rectification of a current from the current transformer; a switching means, for receiving a voltage from the rectifying means, which is switched on at a time that the received voltage is sufficient and switched off at a time that the voltage is insufficient; and at least one subsidiary socket, for connecting with the switching means and parallel-connection with the main socket, capable of connecting to a peripheral electrical apparatus.08-27-2009
20110069516METHOD AND APPARATUS FOR HIGH EFFICIENCY RECTIFICATION FOR VARIOUS LOADS - An apparatus for converting power includes at least one impedance matching network which receives an electrical signal. The apparatus includes at least one AC to DC converter in communication with the impedance matching network. Also disclosed is a method for powering a load and an apparatus for converting power and additional embodiments of an apparatus for converting power.03-24-2011
20110019450High Speed Rectifier Circuit - Provided is a rectifier circuit that includes a depletion mode semiconductor having an output connected to a rectified signal output node of the rectifier circuit and a hot carrier semiconductor diode having a cathode connected to a source node of the depletion mode semiconductor and an anode connected to a gate node of the depletion mode semiconductor. The rectifier may include an alternating current (AC) input node that is connected to the anode of the hot carrier semiconductor diode and the gate node of the depletion mode semiconductor and that is configured to receive an AC input signal.01-27-2011
20100302821Operating Resonant Load Circuit, Dimming Circuit and Dimming Method - An operating resonant load circuit, a dimming circuit and a dimming method are disclosed. The operating resonant load circuit includes: an input unit including a plurality of input terminals, for receiving an AC voltage; a rectifier, for transforming the AC voltage received by the input unit into a DC bus voltage; and a controller, for dividing the DC bus voltage based on an conducting status of the input terminals to output a corresponding DC reference voltage. The dimming circuit and dimming method use the operating resonant load circuit to perform dimming.12-02-2010
20100118575Power Inverter - A current inverter including a bridge circuit with four switch elements is provided. Two opposite connector clamps of the bridge circuit are connected to a direct current part of the current inverter, and further two connector clamps of the bridge circuit are connected to an alternating current part of the current inverter. Direct current and alternating current are converted into each other when the switch elements are controlled appropriately. In the direct current part, a first direct current-sided switch element is coupled to a positive direct current clamp, an inductive resistance mounted in series between the first switch element and a first connector clamp and a diode are arranged downstream from the first switch element. A second direct current-sided switch element is mounted in series between the inductive resistance and the diode. A second connector clamp is mounted such that the inductive resistance connects to the second connector clamp.05-13-2010
20100097830INDUCTION POWER SYSTEM - An induced power system for being connected with and driving loads (04-22-2010
20120201065POWER FACTOR CORRECTION CIRCUIT - A first error amplification circuit amplifies a difference between a predetermined reference voltage and a first detection voltage that corresponds to the output voltage of a DC/DC converter, so as to generate a second voltage. A voltage level judgment circuit generates a third voltage having a discrete level that corresponds to the amplitude of a first voltage. A multiplying/dividing circuit multiplies the first voltage by the second voltage, and divides the resulting product by the third voltage, so as to generate a fourth voltage. A comparator compares the fourth voltage with a second detection voltage that corresponds to a current that flows through a switching transistor included in the DC/DC comparator. A driving circuit turns on the switching transistor for each predetermined period, and turns off the switching transistor according to the output of the comparator every time the second detection voltage becomes higher than the fourth voltage.08-09-2012
20090323381ADAPTABLE POWER SUPPLY CIRCUIT - A power supply circuit and a transponder having a circuit for rectifying an A.C. voltage and two power storage elements, the rectifying circuit providing a rectified voltage to at least one of the storage elements and an output voltage being provided by at least one of the storage elements, and at least one switching element for switching the circuit operation between a state of provision of a relatively high voltage and a state of provision of a relatively low voltage, the second state configuring the rectifying circuit in halfwave operation.12-31-2009
20080247207SYSTEM FOR RECTIFYING AND LIMITING CURRENT AND REDUCING VOLTAGE - A system for reducing and limiting current and reducing voltage for a light string system. The system includes: an input terminal connected to a rectifying circuit; the rectifying circuit being connected between the input terminal and a voltage-reducing and current-limiting circuit; the voltage-reducing and current-limiting circuit being connected between the rectifying circuit and the input terminal; and an output terminal being connected to the device for rectifying current, reducing voltage and limiting current.10-09-2008
20080247206Energy transfer element and converter including the same - An energy transfer element includes a first winding coupled to an input circuit and a second winding coupled to an output circuit. The first winding has a first unit and a second unit, and the second winding is wound between the first unit of the first winding and the second unit of the first winding. The energy transfer element further includes a third winding provided between the first unit of the first winding and the second winding. The third winding is used to supply a bias voltage of the input circuit, and a winding width of the third winding is greater than a winding width of the first unit of the first winding and a width of the second winding.10-09-2008
20090021968SWITCHING POWER SUPPLY APPARATUS AND POWER SUPPLY CONTROL SEMICONDUCTOR INTEGRATED CIRCUIT - Disclosed a switching power supply apparatus which includes a voltage converting transformer including an auxiliary winding on a primary side and a switching control circuit, wherein the switching control circuit includes a detection circuit to detect a falling edge of a terminal voltage of the auxiliary winding, and controls a switching transistor connected to a primary winding of the transformer based on the terminal voltage of the auxiliary winding at the time immediately before current flowing through a secondary rectifier diode of the switching power supply apparatus becomes zero, which terminal voltage is obtained based on a detection timing of the detection circuit.01-22-2009
20090021969APPLIANCE AND POWER SUPPLY THEREFOR - A power supply having an input, a rectifier, a voltage dropping resistor coupled in the circuit to provide a voltage drop between the input and an output of the power supply, a smoothing circuit having at least two capacitors to stabilise the output voltage, whereby a switching network switches the capacitors between a first configuration with a first effective voltage rating, and a second configuration with a second effective voltage rating.01-22-2009
20110255318INSULATOR INTEGRATED POWER SUPPLY - A power scavenging device attaches to an overhead power cable and a support pole. The power scavenging device includes a non-conducting outer body and a first capacitor and a second capacitor that are connected in series forming a voltage divider. A voltage source converter is electrically connected to the output of the power scavenging device. The voltage source converter outputs a regulated power.10-20-2011
20100309697INPUT CURRENT GENERATING SCHEME FOR BUCK-BOOST CONTROLLER - A control circuit for a buck-boost circuit includes an inductor current sensor and an input current generator. The input current generator accepts a signal from the inductor current sensor and outputs a synthesized and integrated signal representing the average input current to the buck-boost circuit. The input current generator averages the inductor current signal or a zero signal based on the state of the buck switch in the buck-boost circuit.12-09-2010
20100309700POWER CONVERTER - An inverter circuit (12-09-2010
20100309698VOLTAGE SOURCE CONVERTER FOR HIGH VOLTAGE DIRECT CURRENT POWER TRANSMISSION - A high voltage AC/DC or DC/AC power conversion system including a voltage source converter with at least two series-connected converter valve bridges, at least two reactors, where each of the reactors is connected to one of the AC phase terminals of the at least two bridges and at least one transformer connected to an AC supply voltage. In order to block a DC voltage from the at least one transformer, one of at least two capacitors is connected in series with each of the at least two reactors and is connected between the corresponding reactor and the at least one transformer.12-09-2010
20100195360METHOD AND SYSTEM FOR POLARITY INDEPENDENT STEP-UP CONVERTER CAPABLE OF OPERATING UNDER ULTRA-LOW INPUT VOLTAGE CONDITION - Apparatus and method for a polarity independent step-up converter capable of operating with ultra low input voltage. The step-up converter as disclosed herein receives an input source having a variable polarity and includes a first core circuit coupled to the input source and an output of the step-up converter and a second core circuit coupled to the input source and the output of the step-up converter. The first core circuit is configured to be active for a first input voltage polarity to output a first step-up voltage and the second core circuit is configured to be active for a second input voltage polarity to output a second step-up voltage.08-05-2010
20100284207AC line signal detection device and method and power supply device - Disclosed herein is an AC line signal detection device including: a semiconductor integrated circuit; and a conversion section adapted to rectify an AC line signal and convert the rectified signal to an input signal to be fed to the semiconductor integrated circuit, wherein the semiconductor integrated circuit includes a monitoring section adapted to divide the AC line signal into a plurality of voltage ranges with at least one reference voltage proportional to the amplitude of the AC line signal to monitor within which voltage range the AC line signal falls; a measuring section adapted to measure a duration for which the AC line signal remains in each of the voltage ranges; and a determination section adapted to determine, based on the monitoring result of the monitoring section and the measurement result of the measuring section, whether the duration for which the AC line signal remains in each of the voltage ranges exceeds a set time which can be set in advance to make a pass/fail determination on the AC line signal.11-11-2010
20100284206POWER ADAPTER AND POWER SUPPLY METHOD THEREOF - A power adapter for an electronic device selectively works in different modes according to a working state signal of the electronic device. When the electronic device is powered off or on with a battery in a determined charge state, the power adapter controls a relay to turn off the relay to disconnect power to the electronic device.11-11-2010
20110085361METHOD OF AND APPARATUS FOR CONTROLLING CONVERTER - Controlled by switching is which reactor in a reactor group present between a power source and a three-level converter is to be connected to an intermediate point that outputs a midpoint potential. In the switching, the closer to the command value of the midpoint potential the command values of input potentials of the converter are, the greater the duty at which corresponding reactors are connected to the intermediate point is for pulse width modulation. Additionally, a predetermined range to be compared with the command values has a predetermined potential width with respect to an AC waveform centered around the command value of the midpoint potential.04-14-2011
20110044080CONVERTER - A converter includes a converter bridge (02-24-2011
20110134672POWER CONVERSION APPARATUS - A power conversion apparatus includes an inverter for converting DC power to AC power for supply to a load, a converter for converting AC power from an AC power supply to DC power for supply to the inverter, and a DC voltage converter for converting a voltage value of power stored in a storage battery and supplying DC power from the storage battery to the inverter when power supply by the AC power supply is abnormal. The converter includes a first three-level circuit which is a multi-level circuit. Similarly, the DC voltage converter includes a second three-level circuit. A control device controls the first and second multi-level circuits to suppress potential fluctuation at a neutral point between first and second capacitors.06-09-2011
20110134671AC/DC CONVERTER PRELOADING CIRCUIT - In an AC/DC converter a preloading circuit is provided for a bridgeless boost converter, including a first diode D06-09-2011
20100165682CURRENT CONTROLLED POWER CONVERTER - A power module that converts a dc voltage into a three-phase ac voltage, current sensors that detect the ac side current of the power module, a shunt resistor and an amplifier that detect a dc side current of the power module, and a control section that controls the power module by pulse-width modulation using a spatial vector modulation method on the basis of the ac side current detected by the current sensors and the dc side current detected by the shunt resistor and the amplifier are provided. The control section corrects the amplitude and the offset of the ac side current detected by the current sensors on the basis of current components, corresponding to current components of prescribed phases of the ac side current, of the dc side current detected by the shunt resistor and the amplifier.07-01-2010
20100067274METHOD AND DEVICE FOR CREATING A DIRECT VOLTAGE OR A DIRECT CURRENT - A device, which functions to generate a DC voltage or a DC current, has at least one rectifier element (D) and at least one transformer (T) that has at least one primary winding (W03-18-2010
20100165683Switching power supply circuit - A switching power supply circuit that obtains a predetermined DC voltage output from an input AC power supply includes a full-wave rectifier and a boost circuit connected to the rectifier. The boost circuit generates a DC output having a predetermined voltage value from the rectifier output. A power factor improving circuit controls an ON-period of an output transistor of the boost circuit, based on feedback of the DC voltage output, and a dynamic over-voltage-protection circuit controls the ON-period of the output transistor as it performs a switching operation. The switching power supply circuit facilitates an over-voltage-protection function that prevents inductor buzzing with an integrated circuit having a small number of pins.07-01-2010
20130194850Feed Forward Control for a Cyclo-Converter - A three-phase resonant cyclo-converter, the cyclo-converter comprising a feed forward control module arranged to develop a feed forward signal for controlling a switching frequency of the cyclo-converter dependent on conditions of a power supply arranged to provide power to the cyclo-converter.08-01-2013
20100027304ELECTRICAL POWER SYSTEM WITH HIGH-DENSITY PULSE WIDTH MODULATED (PWM) RECTIFIER - An electrical power system includes an alternating current (AC) power source configured to output an AC signal, a single phase pulse-width modulated (PWM) rectifier coupled to the AC power source and to an electrical load; a DC link capacitor coupled in parallel to the load and the PWM rectifier; and an active ripple energy storage circuit. The active ripple energy storage circuit has a first terminal, a second terminal and a third terminal, the active ripple energy storage circuit being coupled in parallel to the electrical load, the PWM rectifier and the DC link capacitor via the first terminal and the second terminal, the third terminal being coupled to the second terminal, the active ripple energy storage circuit being configured to selectively absorb and discharge at least part of the ripple energy02-04-2010
20110216565ONE-CYCLE CONTROLLED POWER FACTOR CORRECTION METHOD - A one cycle control method for power factor correction based on a boost circuit and a main control chip of system comprises the steps of: (09-08-2011
20110069515ACTIVE BOOST POWER CONVERTER FOR SINGLE-PHASE SRM - Disclosed is an active boost power converter for driving a single-phase SRM, capable of rapidly establishing excitation current in the excitation mode and reducing tail current and negative torque in the demagnetization mode under the high-speed operation of the SRM. The active boost power converter includes a boost module and a converter module connected to the boost module. The boost module includes first and second capacitors, first and second diodes and a switch device turned on/off to connect the first and second capacitors to each other in series or parallel. The switch device includes an insulated gate bipolar transistor (IGBT). The power converter is operated with first and second input modes and first and second output modes. Voltage of the first capacitor is equal to dc-link voltage and first and second capacitors are controlled to be operated in series or parallel by simply controlling the IGBT.03-24-2011
20120307537RECTIFIER CIRCUIT, METHOD FOR OPERATING THE RECTIFIER CIRCUIT, AND ENERGY HARVESTING SYSTEM COMPRISING THE RECTIFIER CIRCUIT - The input terminals of an energy-scavenging interface are connectable to a transducer including a storage element, and output terminals of the interface are connectable to an electrical load. The interface includes a first switch that is closed to pass current and store electrical energy in the storage element for a first time interval. The first time interval is based on at least one of a first delay proportional to a time constant of the transducer and sensed current flowing through the first switch reaching a first threshold. The first switch is thereafter opened so to permit the stored electrical energy to be delivered through a first current-conduction element for a second time interval. The second time interval is based on sensed current flowing through the first current-conduction element reaching a second threshold. The first current-conduction element may comprise a second switch actuate out of phase with the first switch.12-06-2012
20120307536SYNCHRONOUS RECTIFIER DRIVER CIRCUIT RECTIFIER - A synchronous rectifier includes a primary rectifier circuit and a secondary rectifier circuit. The primary rectifier circuit is configured to produce first and second half-rectified signals from respective first and second primary voltage outputs of a first transformer winding. The secondary rectifier circuit is configured to rectify a voltage output of a second transformer winding in response to first and second transistor gate inputs. A first buffer driver is configured to receive the first half-rectified signal and to provide a first buffered control signal to the first transistor gate input. A second buffer driver is configured to receive the second half-rectified signal and to provide a second buffered control signal to the first transistor gate input.12-06-2012
20100080028POWER CONVERSION SYSTEM AND METHOD FOR ACTIVE DAMPING OF COMMON MODE RESONANCE - Power conversion systems and methods are presented for damping common mode resonance, in which inverter or rectifier switching control signals are selectively modified according to a damping resistance current value computed using a predetermined virtual damping resistance value in parallel with an output or input capacitor and a measured output or input voltage value to mitigate or reduce common mode resonance in the converter.04-01-2010
20120099355POWER SUPPLY CIRCUIT - A power supply circuit includes a voltage regulating circuit, a control circuit, and a switch circuit. The voltage regulating circuit receives an AC voltage signal from a live wire output terminal and converts the AC voltage signal to a control signal. The control circuit receives the control signal and turns on or turns off an electronic connection from the AC voltage signal to the switch circuit according to the control signal. The switch circuit is configured to be powered on and output the AC voltage signal when the electronic connection from the AC voltage signal to the switch circuit is turned on.04-26-2012
20100182813PN DIODE, ELECTRIC CIRCUIT DEVICE AND POWER CONVERSION DEVICE - In a SiC pn diode, the lifetime is controlled by electron beam irradiation of about 3×1007-22-2010
20120039103SINGLE-STAGE AC/DC CONVERTER - A single-stage AC/DC converter is provided, and which includes a power-frequency follow-current circuit, an isolated transmission circuit (ITC), a high-frequency chopper modulation circuit (HFCMC), a power-frequency and high-frequency AC rectifying-circuit and a filter-circuit. The input of the ITC is connected to the output of an external power-frequency power source, the current-modulating side of the ITC is connected to the input of the HFCMC, the output of the ITC is connected to the input of the power-frequency and high-frequency AC rectifying-circuit, the output of the HFCMC is connected to the input of the external power-frequency power source through the power-frequency follow-current connected in series with the HFCMC , and the output of the power-frequency and high-frequency AC rectifying circuit is connected to a load through the filter circuit connected in series with the power-frequency and high-frequency AC rectifying-circuit. The invention simplifies the rectifier part with higher transformation efficiency.02-16-2012
20090027934Electric Transformer-Rectifier - An electric transformer-rectifier is provided such that electrical current is supplied from a three phase alternating current supply. The device includes a tri-phase transformer, where each secondary winding has its terminals available to connect to their respective secondary windings. Power is supplied to a set of three boost converters, which in turn supply power to a set of three banks. In embodiments of the invention a set of three full wave mono-phase rectifiers, connected to the respective secondary wirings, supply power to respective capacitors banks and a three buck converter. Further the device produces continuous current to the load and sinusoidal input current in each winding of the transformer. By this invention it is possible to build a power converter in which incoming voltages and currents are approximately sinusoidal and the outgoing voltages are approximately constant.01-29-2009
20110075459Power Factor Correction Circuits, Systems and Power Supplies Operable With Different Input Voltages - A cost effective solution for power factor correction in power devices operating at two widely separated input voltages comprises two unequal power rails. One power rail is optimized for operation at high line voltage only, while the other power rail is designed only for low line voltage. When operating at high line voltage, the second rail is disabled. At low line, both power rails are enabled but by virtue of unequal boost inductors, the high line power rail handles only about 30% of the power while the low line power rail handles the remaining power. Hence, the efficiency at high line voltage is maximized. As the inductance used in the high line power rail is much higher in value, it stays in continuous conduction mode for all load conditions and hence the power factor is significantly improved.03-31-2011
20110317459CONTROLLER FOR A POWER CONVERSION CIRCUIT - A power conversion controller for controlling the operation of a switch in a power conversion circuit. The switch having a “time-on” property and a “clamping frequency” property, in use. The power conversion controller comprises a detector configured to detect one or more operational parameter values of the power conversion circuit, and a clamping frequency adjuster configured to adjust the clamping frequency of the switch in accordance with the one or more detected parameter values in order to maintain the “time-on” property of the switch above a minimum threshold value.12-29-2011
20120044729BRIDGELESS COUPLED INDUCTOR BOOST POWER FACTOR RECTIFIERS - A bridgeless power factor correction system may include an AC input having a first input terminal and a second input terminal, an inductor module coupled with the first input terminal, and a switching module coupled between the second input terminal and the inductor module. The switching module may comprise a bi-directional voltage blocking switch that is configured to selectively couple the inductor module with the AC input based on an output voltage and a phase difference between an input voltage waveform and an input current waveform. The switching module may also comprise an auxiliary network for reversing a winding current to achieve zero voltage switching. An output module may be coupled with the inductor module, and provide an output to a load. The inductor module may include a magnetically coupled inductor having a primary and secondary winding. The output module may include a full or half bridge rectifier.02-23-2012
20100202174AC-DC CONVERTER CIRCUIT AND POWER SUPPLY - An AC-DC converter and a power supply are described.08-12-2010
20120044728ELECTRIC POWER CONVERTER - In aspects of the invention, first and second series circuits of switching devices and a series circuit of capacitors are connected in parallel. Between the connection point in the first series circuit of switching devices and the connection point in the series circuit of capacitors, a first bidirectional switch is connected and, between the connection point in the second series circuit of switching devices and the connection point in the series circuit of capacitors, a second bidirectional switch is connected. The connection point in the first series circuit of switching devices is connected through a reactor to an input-output common connection line connected to one end of an AC power supply and the other end of the AC power supply is connected to the connection point in the series circuit of capacitors.02-23-2012
20120155138CAPACITIVE POWER SUPPLY WITH SURGE CURRENT LIMITATION - A capacitive power supply including: a first capacitive element and a first resistive element in series between a first terminal of a power switch and at least one rectifying element having a second terminal connected to a first electrode of at least one second capacitive element for providing a D.C. voltage; and a bidirectional switch in parallel on the resistor.06-21-2012
20120155137POWER STEALING CIRCUITRY FOR A CONTROL DEVICE - A power stealing circuit for stealing power to operate a control device is disclosed. In one illustrative embodiment, power may be periodically or intermittently diverted from a power source to a power stealing block. When power is diverted to the power stealing block, the power stealing block may steal power from the power source and store the stolen power on a storage device. The storage device may then provide operating power to a control device. In some embodiments, the power stealing block may include a first path for charging the storage device when a switch is ON, and a second path for charging the storage device when the switch is off.06-21-2012
20120155136WIRELESS POWER RECEIVER CIRCUITRY - Exemplary embodiments are directed to wireless power receivers. A device may include a power converter configured to receive an input voltage. The device may further include circuitry configured to limit a pulse width modulation duty cycle of the power converter to prevent the input voltage from dropping below a threshold voltage.06-21-2012
20120008355PASSIVE THREE PHASE INPUT CURRENT HARMONIC REDUCTION AND POWER FACTOR CORRECTION CIRCUIT FOR POWER SUPPLIES - A harmonic input current reduction and power factor correction circuit for three phase, power supplies. The circuit includes passive elements including a series inductance and capacitor connected between each AC line of a three phase voltage source, and each input phase of the uncorrected power supply. The inductance and capacitor are designed and chosen to meet linearity and volt ampere requirements to achieve total harmonic current levels of less than 10%, and power factors greater than 0.98. This is achieved with less than 1% loss in line operating input voltage range and overall efficiency of greater than 99.5%. Further, the dynamic response of a circuit to power supply load transient demands is limited in voltage overshoot or undershoot effects.01-12-2012
20100061127POWER SUPPLY DEVICE - The power supply device according to the present invention converts alternating-current power into direct-current power, and supplies the direct-current power to a load. Further, the power supply device includes a buffer, a control section, a rectifier circuit, a smoothing circuit, and a switch. After a predetermined zero cross point is detected, the control section uses in common, over a predetermined period of the alternating-current power, predetermined parameters retained in the buffer in calculating a timing at which a PAM interrupt pulse is generated.03-11-2010
20120008354DISCHARGE LOOP FOR POWER SUPPLY CIRCUIT AND ACTIVE CONTROL CIRCUIT THEREOF - Provided is a discharge loop for power supply and the active control circuit thereof for actively regulating the discharging operation of the discharge loop of the power supply. The inventive active control circuit is able to disallow the current to flow through the bleeder resistor of the discharge loop to cause power loss when the input power of the power supply is applying, and provide a fast discharge path for the bleeder resistor to expedite the discharging operation when the input power of the power supply is interrupted. Therefore, the inventive active control circuit is able to reduce the power loss of the power supply and enhance the power efficiency of the power supply.01-12-2012
20120063186LOW CURRENT CONSUMPTION ELECTRICAL CONTROL SWITCH - The invention provides a low current consumption control switch device and method related thereto. The control switch device includes a switch control component, a microprocessor, a wireless signal receiver for receiving control signal and a DC power supply. The DC power supply draws an AC current from the AC power supply to power the wireless signal receiver, the microprocessor and the switch control component. The switch control component has a control input for receiving control instructions to control current supply from the AC power supply. The microprocessor is operatively connected to the switch control component for providing control instructions to alter its switching state. The control signal comprises a preamble and a message portion. The wireless signal receiver is configured to alternate between at least two current consumption modes and to remain in a higher current consumption mode upon detection of the preamble.03-15-2012
20120063185Modular switch for an electrical converter, electrical converter, as well as method for operating an electrical converter - Described is a modular switch for an electrical converter. The modular switch is provided with a first series circuit including a first controllable power semiconductor component and a first diode as well as with a second series circuit including a second diode and a second controllable power semiconductor. The connecting point between the first power semiconductor component and the first diode forms a first terminal and the connecting point between the second diode and the second power semiconductor component forms a second terminal of the modular switch. Also provided is a capacitor, wherein the first series circuit and the second series circuit and the capacitor are switched parallel to each other.03-15-2012
20120014152METHOD FOR CONTROLLING SWITCHING POWER UNIT - There is provided a method for controlling a switching power unit that converts AC input voltages of an AC source into a DC voltages while improving a power-factor of the AC input voltages, the switching power unit comprising an AC/DC converter circuit that is composed of a power-factor correction unit and a current resonance converter unit wherein at least a part of switching elements of the current resonance converter unit is shared with switching elements of the power-factor correction unit, wherein around timing that polarities of the AC source are switched between a positive half cycle and a negative half cycle, ON-and-OFF control of the switching elements are performed as that high frequency voltages that are applied to a primary winding of a high frequency transformer which is a part of the current resonance converter unit are to be symmetrical in a positive and negative relation.01-19-2012
20120057384METHOD OF ADAPTING A CONFIGURATION OF A VOLTAGE CONVERTING DEVICE AND VOLTAGE CONVERTING UNIT FOR A VOLTAGE CONVERTING DEVICE - A method of adapting a configuration of a voltage converting device is provided. The voltage converting device includes a plurality of voltage converting units in parallel electrical connection to one another, and a plurality of inter-bridge transforming units. Each of the inter-bridge transforming units has a primary coil and a secondary coil. Each of the voltage converting units is electrically connected to a primary coil of a different one of the inter-bridge transforming units. The method includes detecting a status of at least one element of the group consisting of the voltage converting units and the inter-bridge transforming units. The method further includes adapting an activity state of the element based on the detected status of the element by moving the element from a first position to a second position.03-08-2012
20090097291Universal power supply for a laptop - A highly efficient DC power supply for laptop computers and the like is converted directly off-line from an A.C. or DC voltage source to have a plurality of output voltages closely regulated according to the computer requirements and includes a DC voltage source for operating integrated circuits that is independent of input or output voltage. The line supply, rectified if necessary, is connected to a transformer input and switched “off” and “on” in a pulse width modulated mode at a frequency rate above 1000 Hz and the transformer outputs are filtered through a “buck” stage to permit voltage regulation by pulse width modulation from a very low percentage, which may approach zero, to as much as ninety percent “on-time”, without core saturation.04-16-2009
20120026768FACILITY POWER SUPPLY WITH POWER-FACTOR CORRECTION - An embodiment of a power supply includes an input node, a converter stage, and an outlet. The input node is operable to receive an input AC signal having peak portions and non-peak portions. The converter stage is operable to generate a DC power signal from the input AC signal and to cause a first current to be drawn from the input node during at least the non-peak portions of the input AC signal. And the outlet is operable to carry the DC power signal. For example, such a power supply may be installed in a facility such as a residence, office building, or manufacturing plant, or the facility's existing power supply may be retrofitted, to provide one or more power outlets that each carry a respective power-factor-corrected (PFC) DC voltage. Because the outlet voltages are PFC voltages, the amount of wasted power dissipated in the facility power lines/wiring and in the main power lines from the power company may be significantly reduced, without requiring each piece of equipment (e.g., an appliance, machinery) that is wired/plugged into the outlets to have an onboard PFC. This savings in wasted power may provide a significant cost savings to both the facility owner (e.g., lower electric bill) and the power company (e.g., lower power-generation and grid costs), and the ability to use equipment lacking onboard PFCs may reduce the purchase price of the equipment.02-02-2012
20120300518TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller controls a first current flowing through a parallel-coupled load. During a rising period of a rectified AC voltage, when a load voltage does not exceed a first voltage, the two-terminal current controller operates in a first mode. When the load voltage exceeds the first voltage but does not exceed a second voltage, the two-terminal current controller operates in a second mode. When the load voltage exceeds the second voltage, the two-terminal current controller operates in a third mode. When the load voltage drops to a third voltage smaller than the second voltage after exceeding the second voltage, the two-terminal current controller operates in the second mode when a difference between the second and third voltages exceeds a hysteresis band and operates in the third mode when a difference between the second and third voltages does not exceed the hysteresis band.11-29-2012
20090135633Ac Adapter, Electronic Apparatus and Power Supply System - An AC adapter includes an AC/DC converter device for transforming an alternating-current power to a direct-current power, a power supply line that supplies the direct-current power converted by the AC/DC converter device to an electronic apparatus, and a memory for storing an AC adapter ID that identifies the AC adapter.05-28-2009
20120106217CURRENT CONTROLLED POWER CONVERTER - A current controlled power converter includes a converting part configured to convert a three-phase ac voltage into a dc voltage or converts a dc voltage into a three-phase ac voltage, ac side current detection portions configured to detect an ac side current of the converting part, dc side current detection portions configured to detect a dc side current of the converting part, and a control section configured to control the converting part by pulse-width modulation using a spatial vector modulation method based on the ac side current detected by the ac side current detection portions and the dc side current detected by the dc side current detection portions. The control section corrects an amplitude error of the ac side current detected by the ac side current detection portions, and an offset error of the ac side current detected by the ac side current detection portions.05-03-2012
20100328975POWER CONVERTER - In a power converter for converting AC power supplied from an AC power source or DC power supplied from a DC power source to DC power or AC power having predetermined voltage and frequency including at least one switching device (12-30-2010
20110103113COMPOSITE AC TO DC POWER CONVERTER - A 24-pulse composite AC-to-DC converter is a converter using two or more conversion methods in parallel. The converter may include a main rectifier receiving at least a portion of an input AC signal, an autotransformer having an output voltage with lower amplitude than the input AC signal, and a plurality of auxiliary bridge rectifiers, each receiving the output from each leg of the autotransformer. In one embodiment of the invention, the main rectifier may receive a substantial portion of the load current, allowing each of the auxiliary bridge rectifiers to be generally smaller than the main rectifier.05-05-2011
20120120697Three-phase isolated rectifer with power factor correction - A new class of Three-Phase Isolated Rectifiers with Power Factor Correction provides a high efficiency, small size and low cost due to direct conversion from three-phase input voltage to output DC voltage.05-17-2012
20120120696Power Factor Correction Converter - [OBJECT] A PFC converter is provided in which a smoothing capacitor can be small in size and a power supply circuit connected to the subsequent stages can be simple, efficient, low-cost, small in size and lightweight through the functionality of the PFC converter itself of preventing the output voltage from dropping in the event of a power failure or instantaneous power failure of an input power supply.05-17-2012
20120120698SWITCHING BRANCH FOR THREE-LEVEL CONVERTER AND METHOD FOR CONTROLLING SWITCHING BRANCH OF THREE-LEVEL CONVERTER - Exemplary embodiments for controlling a switching branch for a three-level converter, and a switching branch are disclosed. A first semiconductor switch and a second semiconductor switch, a first diode and a second diode, a third semiconductor switch and a fourth semiconductor switch, a third diode, and a fourth diode, a fifth semiconductor switch and a sixth semiconductor switch, a fifth diode, and a sixth diode, and a control arrangement for controlling the semiconductor switches are provided. The first semiconductor switch, the first diode, the fifth semiconductor switch and the fifth diode reside in a first switching branch-specific semiconductor module, and the fourth semiconductor switch, the fourth diode, the sixth semiconductor switch and the sixth diode reside in a second switching branch-specific semiconductor module.05-17-2012
20120250382RESONANT ISOLATED CONVERTERS FOR POWER SUPPLY CHARGE BALANCING SYSTEMS AND OTHER SYSTEMS - A converter circuit includes a primary side having a resonator and a first control circuit configured to control the resonator. The converter circuit also includes a secondary side having a resonant rectifier and a second control circuit configured to control the resonant rectifier. The converter circuit further includes a transformer configured to electrically isolate the primary side from the secondary side. The second control circuit is configured to turn the resonant rectifier on and off. The first control circuit may be configured to detect when the resonant rectifier is off and, in response, turn the resonator off without using a feedback signal from the secondary side. The first control circuit may be configured to detect when the resonant rectifier is off by detecting when input power to the primary side decreases. The resonant rectifier could be turned on and off by detuning the resonant rectifier.10-04-2012
20100246227Switching power supply - A switching power supply has a full-wave AC rectifier circuit; a chopper circuit including an inductor, a capacitor smoothing current from the inductor, and a switching device for on-off control of the current fed to the capacitor. The rectifier circuit further has an input voltage detector circuit detecting chopper circuit input voltage; an output voltage error detector circuit detecting an error between an output voltage from the chopper circuit and a set voltage; a current control signal generator circuit generating a current control signal in-phase with an input voltage detection signal having a waveform similar to the input voltage detection signal and an amplitude proportional to an output voltage error signal; a current detector circuit detecting inductor current flow; a frequency setting circuit; an oscillator circuit; and a switching control circuit switching the switching device based on oscillation circuit signal, the current control signal, and the current detection signal.09-30-2010
20120127766CONFIGURABLE HYBRID CONVERTER CIRCUIT - A circuit for a hybrid voltage source converter suitable for high voltage DC power transmission and reactive power compensation. The circuit comprises an assembly of electrically interconnected elements (Elements 05-24-2012
20120163054POWER SUPPLY UNIT HAVING A VOLTAGE CONVERTER - The present invention concerns an electrical installation or device equipped with a power supply unit comprising a voltage converter having primary and secondary parts respectively defining a primary side and a secondary side of this electrical installation or device. This power supply unit comprises a power management unit arranged on the primary side, the primary part of the converter being associated with a control circuit also arranged on the primary side and controlling the electrical energy flowing in the primary power path of the primary part. The control circuit receives from the power management unit at least a first control signal for switching OFF the electrical energy in the primary power path, the power supply unit entering a very low power mode (“Power-down” mode) when the first control signal is set to OFF so that the converter is not supplied anymore. The power management unit is arranged such that, in the very low power mode, it can receive or generate at least a wake-up signal and set to ON the first control signal in response to the wake-up signal for supplying again the primary and secondary parts of the converter.06-28-2012
20120163053CIRCUIT FOR CONTROLLING A SWITCH IN SERIES WITH A CAPACITIVE ELEMENT - A circuit including a switch controlling a capacitive element intended to receive an A.C. voltage, and a diode in parallel with the switch.06-28-2012
20120163052Power supply unit and information processor - A power supply unit includes multiple input terminals to which alternating-current power is input; a positive terminal and a negative terminal for outputting direct-current power; a rectifier circuit configured to rectify the input alternating-current power; a first inductor connected to the rectifier circuit; a first capacitor connected between the positive terminal and the negative terminal; a first rectifying device connected between the output terminal of the first inductor and the positive terminal and having a rectification direction in a direction from the output terminal of the first inductor toward the positive terminal; a switching device connected between an input terminal of the first rectifying device and the negative terminal; a second rectifying device and a second capacitor connected in parallel to the switching device; and a second inductor connected between a connection of the second rectifying device and the second capacitor and the positive terminal.06-28-2012
20110182094SYSTEM AND METHOD TO MANAGE POWER USAGE - A system and method are provided for managing electrical power usage. During a predetermined time period, such as during blackout conditions, a digital signal processor (DSP) controls an IGBT/FET-based device to supply an allocated amount of power. When the consumed amount of power exceeds the allocated amount, the DSP shuts off the power. Alternatively, the system provides a signal to reduce the consumed power. If sufficient load has not been reduced after a predetermined amount of time, the power is shut off. Further alternatively or in addition, the DSP may shut off power to predetermined electrical outlets, while providing power to other electrical outlets, to reduce the power usage to the predetermined amount. During other time periods, the DSP controls the IGBT/FET device to provide a predetermined voltage that is less than the AC incoming line voltage. When the voltage drops below the predetermined voltage, such as during brownout conditions, a microprocessor controls an electronic switch on the primary windings side of a transformer system to provide a boosted output voltage.07-28-2011
20090059633MATRIX CONVERTER APPARATUS - There is provided a matrix converter apparatus including both functions of outputting a step up voltage and outputting a step down voltage. In a matrix converter apparatus for directly connecting respective phases of a three phase alternating current power source (03-05-2009
20120075895Universal-Voltage Discrete Input Circuit - A universal-voltage discrete input circuit uses a high voltage depletion-mode field effect transistor in combination with a low-voltage, adjustable precision shunt regulator and an isolation circuit for interfacing a low voltage digital logic circuit to a switched external voltage ranging from about 7 volts to about 1000 volts AC or +/−DC, at a low fixed current. In addition to the wide input voltage range accepted at a uniform low current value, very high voltage isolation is provided between the external voltage and the low voltage digital logic circuit, and elimination of ground loops and common mode noise.03-29-2012
20120176826SOURCE AND MULTIPLE LOADS REGULATOR - A circuit that has one or more control units that divide a load into two or more load groups, with each load group comprised of at least one load element. The one or more control units directing power from a power source to one or more of the load groups based on voltage variations in an output of the power source, load grouping, and operational parameters of the load elements. The circuit further includes one or more pass stages that regulate current flow from the power source to the load groups.07-12-2012
20100008117POWER SUPPLY UNIT HAVING A VOLTAGE CONVERTER - The present invention concerns an electrical installation or device equipped with a power supply unit comprising a voltage converter having primary and secondary parts respectively defining a primary side and a secondary side of this electrical installation or device. This power supply unit comprises a power management unit arranged on said primary side, the primary part of the converter being associated with a control circuit also arranged on said primary side and controlling the electrical energy flowing in the primary power path of said primary part. The control circuit receives from the power management unit at least a first control signal for switching OFF the electrical energy in said primary power path, said power supply unit entering a very low power mode (“Power-down” mode) when said first control signal is set to OFF so that the converter is not supplied anymore. The power management unit is arranged such that, in said very low power mode, it can receive or generate at least a wake-up signal and set to ON said first control signal in response to said wake-up signal for supplying again said primary and secondary parts of the converter.01-14-2010
20120218799POWER REGENERATION DEVICE, METHOD OF REGENERATING POWER, POWER STORAGE SYSTEM, METHOD OF STORING POWER, AND HIGH FREQUENCY DEVICE - A power regeneration device includes an extraction unit and a high frequency-to-DC converter. The extraction unit is provided on a transmission path. The transmission path is provided for transmitting a high-frequency wave from a high-frequency wave source to a high-frequency load. The extraction unit extracts a reflected high-frequency wave generated by reflecting the high-frequency wave from the high-frequency load. The high frequency-to-DC converter converts the reflected high-frequency wave extracted by the extraction unit into DC power.08-30-2012
20120218798POWER CONVERSION DEVICE - A power conversion device (08-30-2012
20120218797DRIVING CIRCUIT FOR BRIDGE RECTIFIER AND A DRIVING METHOD THEREOF - The embodiments of the present circuit and method disclose a bridge rectifier and a driving circuit. The bridge rectifier having a first input, a second input, a first output, and a second output may comprise two high side diodes and two low side switches. The driving circuit may be coupled to the first input of the bridge rectifier and the second input of the bridge rectifier, and the driving circuit may be configured to provide a first driving signal and a second driving signal. The first driving signal may be coupled to a first low side switch and the second driving signal may be coupled to a second low side switch. The first driving signal may be limited to less than a first predetermined driving voltage and the second driving signal may be limited to less than a second predetermined driving voltage.08-30-2012
20100265745PARAMETER CONFIGURATION METHOD FOR ELEMENTS OF POWER FACTOR CORRECTION FUNCTION CONVERTER - The present invention discloses a parameter configuration method for elements of a PFC function converter. The converter has a PFC circuit modulating an input power into a DC modulated power and a transformer transforming the DC modulated power into an output power. The method of the present invention comprises a storage capacitor configuration procedure, a storage inductor configuration procedure and a verification procedure. The storage capacitor configuration procedure predetermines a test voltage and a rated bus voltage lower than the test voltage, determines a parameter of the storage capacitor according to the test voltage and uses the storage capacitor to supply the rated bus voltage. The storage inductor configuration procedure determines an inductance of a storage inductor to match the storage inductor and the primary coil of the transformer work in a discontinuous current mode. The verification procedure verifies whether the power factor of the converter exceeds 0.9.10-21-2010
20100296323Integrated device with AC to DC conversion function and integrated circuit using same - The present invention discloses an integrated device with AC to DC conversion function, and an integrated circuit using the device. The integrated circuit comprises: a circuit operating under low DC voltage; and an integrated device with AC to DC conversion function, the device including first, second, third and fourth diodes, wherein the first diode has a cathode coupled to an anode of the second diode at a first node which receives an input of an AC voltage; the third diode has a cathode coupled to an anode of the fourth diode at a second node which receives another input of the AC voltage; the first diode has an anode coupled to an anode of the third diode at a third node which provides a low level of a DC voltage; and the second diode has a cathode coupled to a cathode of the fourth diode at a fourth node which provides a high level of the DC voltage.11-25-2010
20120257428Power Supply Circuit Device - A power supply circuit device comprises a relay, a main rectifier circuit, a standby rectifier circuit, a standby power supply circuit and a main power supply circuit. The main rectifier circuit rectifies an AC voltage from an external power supply, and inputs the rectified voltage to the main power supply circuit. The relay is inserted in the power supply path from the external power supply to the main power supply circuit, and is turned off in standby mode to turn off the voltage supply to the main power supply circuit, so that power consumption can be reduced. Since the voltage turned off by the relay is an AC voltage before being rectified by the main rectifier circuit, shock applied to the relay when turned off can be reduced, thereby reducing likelihood of failure and improving reliability.10-11-2012
20120188808Timing Device without Neutral Line - A timing device without a neutral line is disclosed, comprising a hot line (L line) input, a hot line (L line) output, a second filter module, a triac, a current limiting module, a current rectifying module, a SCR, a first filter module, a MCU, a display module, an operation interface module, and a power input module provides the power required for entire operations. And, the operation interface module can input the control signal into the MCU and further output a signal to the second filter module for filtering to conduct the SCR and finally through the current rectifying module and the current limiting module to conduct the triac. Therefore, the current can enter into the AC output for providing electronic power.07-26-2012
20120188809POWER SOURCE CIRCUIT EFFICIENT IN CONVERSION FROM ALTERNATING CURRENT TO DIRECT CURRENT - A power source circuit which includes input portions, a limiting resistor connected to one of the input portions, a rectifier connected to the limiting resistor, a sampling resistor connected to the rectifier, output portions connected to the rectifier, a control circuit, and a switch circuit connected to the control circuit. The control circuit is connected to the two ends of the sampling resistor and the switch circuit is connected to the two ends of the limiting resistor. The control circuit is configured to output a first signal to the switch circuit if the current in the sampling resistor is greater than a predetermined value. The predetermined value is less than the level of current being consumed by a load in normal operation. The switch circuit is configured to isolate the sampling resistor when the first signal is received.07-26-2012
20120230073TWO-WIRE DIMMER SWITCH FOR LOW-POWER LOADS - A two-wire load control device (such as, a dimmer switch) for controlling the amount of power delivered from an AC power source to an electrical load (such as, a high-efficiency lighting load) includes a thyristor coupled between the source and the load, a gate coupling circuit coupled between a first main load terminal and the gate of the thyristor, and a control circuit coupled to a control input of the gate coupling circuit. The control circuit generates a drive voltage for causing the gate coupling circuit to conduct a gate current to thus render the thyristor conductive at a firing time during a half cycle of the AC power source, and to allow the gate coupling circuit to conduct the gate current at any time from the firing time through approximately the remainder of the half cycle, where the gate coupling circuit conducts approximately no net average current to render and maintain the thyristor conductive.09-13-2012
20110122668CAPACITOR ENERGY RELEASE CIRCUIT WITH REDUCED POWER CONSUMPTION AND POWER SUPPLY HAVING THE SAME - A power source includes a power input terminal, a filtering unit, a main circuit and a capacitor energy release circuit. The power input terminal receives an AC voltage. The filtering unit is connected to the power input terminal for filtering off noise contained in the AC voltage. The main circuit is connected to the filtering unit and a load. The AC voltage is filtered by the filtering unit and converted into an output DC voltage by the main circuit, and the output DC voltage is transmitted to the load. The capacitor energy release circuit is connected to the power input terminal, the filtering unit and a common terminal for detecting whether the AC voltage is received by the power input terminal. When the AC voltage is not received by the power input terminal, electric energy stored in the filtering unit is discharged.05-26-2011
20120262965SINGLE-WALL CARBON NANOTUBE DIODES - Methods and devices relating to diodes including single-wall carbon nanotubes (SWCNT) are disclosed according to embodiments of the present invention. According to one embodiment, a diode may include one or more SWCNTs. The SWCNTs may be grouped together in multiple bundles with the SWCNTs being generally aligned parallel to each other in the bundles.10-18-2012
20120262963MULTI-PHASE RECTIFIER OF ALTERNATOR - The present invention provides a multi-phase rectifier of an alternator having a plurality of phases, and each of the phases include at least a positive rectifying device and at least a negative rectifying device. The negative rectifying device includes a schottky diode and a diode with reverse breakdown effect in parallel connection. An anode of the schottky diode is connected to the input port and a cathode thereof is connected to a negative terminal of the output port. Therefore, the multi-phase rectifier of the present invention may have a low power loss and protective function in high voltage.10-18-2012
20100328974RESONANT CONVERTER FOR ACHIEVING LOW COMMON-MODE NOISE, ALONG WITH ISOLATED POWER SUPPLY AND METHOD EMPLOYING THE SAME - Embodiments are described for reducing common-mode current in electronic devices. In the various embodiments, a resonant converter is employed, for example in a power supply, and the resonant converter is driven by a DC input to generate an AC primary voltage on the primary windings of a power transformer. The DC input may be derived from an AC line voltage or a DC-to-DC converter. The AC primary voltage drives the primary winding of the transformer to generate an AC secondary voltage on at least one secondary winding of the transformer. The AC secondary voltage may then drive a rectifier, which in turn drives a low-pass filter to produce a DC output voltage. Phase-shift modulation is employed which, in conjunction with the resonant converter, applies a sinusoidal waveform to the primary of the transformer resulting in a reduced amount of common-mode current injected onto the secondary.12-30-2010
20080298105Switching power supply system - A switching power supply system, in which a DC voltage obtained by full-wave rectification of an AC voltage is turned on and off by a switching device, converted to a desired DC voltage and outputted, includes a slope compensating circuit and an overcurrent protecting circuit, and a full-wave rectified voltage inputted to a terminal Tm is subtracted from a reference voltage Vref inputted to a terminal Tr to produce a reference voltage waveform signal (OCP correction value) Vocp to eliminate the influence of slope compensation. The reference signal of the overcurrent protection circuit is varied by a signal having a reverse phased waveform relative to the phase of the full-wave rectified waveform. This enables highly accurate overcurrent protection with a net overcurrent protection level unaffected by the slope compensation varied by the input voltage when the system is operated in a current mode.12-04-2008
20120262962Active Rectifier For Vehicles - A vehicle power system including an unregulated alternator; a saturable reactor receiving an output AC voltage from the alternator and generating a reduced AC voltage in response to a bias signal; and an active rectifier rectifying the reduced AC voltage to a DC voltage.10-18-2012
20120262964ALTERNATE CURRENT RECTIFIER CIRCUIT AND POWER CIRCUIT - An alternate current rectifier circuit which includes a first diode, a second diode, a first transistor, a second transistor, a third transistor, and a fourth transistor is power saving. The first diode is connected to the first transistor and the fourth transistor; the second diode is connected to the second transistor and the third transistor. During a positive half cycle of the alternate current, the first transistor and the fourth transistor are switched on and the alternate current flows through the first diode, the first transistor, and the fourth transistor; during a negative half cycle of the alternate current, the second transistor and the third transistor are switched on and the alternate current flows through the second diode, the second transistor, and the third transistor.10-18-2012
20120320647SWITCHING BRANCH FOR THREE-LEVEL RECTIFIER, AND THREE-PHASE THREE-LEVEL RECTIFIER - An exemplary switching branch for a three-level rectifier includes a first diode and a first semiconductor switch connected in series between a positive direct voltage pole and a neutral direct voltage pole, a second diode and a second semiconductor switch connected in series between a negative direct voltage pole and the neutral direct voltage pole as well as a thyristor and a third diode connected in series between a connection point between the first diode and the first semiconductor switch and a connection point between the second diode and the second semiconductor switch in such a manner that a connection point between the thyristor and the third diode is connected to an alternating voltage pole of the switching branch.12-20-2012
20120320648CYCLO-CONVERTER AND METHODS OF OPERATION - A three phase full resonant cyclo-converter suitable for converting a three phase AC supply to a DC output. In one embodiment the cyclo-converter consists of two half bridge cyclo-converters driving a resonant circuit. The main switching sequence of the cyclo-converter may consist of a switching sequence in which the phases of a three phase supply are switched in a repeating sequence from the largest to the smallest absolute voltage value of the supply phases.12-20-2012
20110019451Power Supply Auxiliary Circuit - A power supply auxiliary circuit includes a power input unit for receiving an AC input voltage, a voltage regulating unit for dropping the AC input voltage, a rectifying unit for converting the dropped AC input voltage into a DC voltage, a snubber unit for filtering the DC voltage, a power output unit for sending the filtered DC voltage, a switch unit connected between the rectifying unit and a feedback control unit, and the feedback control unit connected between the power output unit and the switch unit for detecting and analyzing the output voltage of the power output unit, and then generating a corresponding control signal to determine a switch state of the switch unit that makes the current from the rectifying unit partially back-flow to the power input unit or not, and further regulates the value of the output voltage of the power output unit.01-27-2011
20120268976THREE-PHASE RECTIFIER CIRCUIT - In one aspect of the invention, a three-phase rectifier circuit having three input terminals and two output terminals includes a three-phase diode bridge, three switching circuits, and a voltage source. The three-phase diode bridge has three pairs of first diodes electrically parallel-connected to the two output terminals. Each pair of first diodes has two first diodes series-connected defining a first node therebetween, and electrically connected to a corresponding input terminal at the first node. Each switching circuit has a first terminal, a second terminal and a plurality of switches electrically series-connected between the first and second terminals. The first and second terminals are respectively electrically connected to a second node and a third node, respectively between the first node and the two first diodes of the corresponding pair of first diodes. The voltage source is electrically parallel-connected between the two output terminals and electrically connected to each switching circuit.10-25-2012
20120320646DIMMER SYSTEM AND CONTROL SYSTEM AND METHOD THEREOF - A control system includes a detection circuit, a control circuit, and a dummy load system. The detection circuit is operable to detect a voltage level change of a direct-current voltage and output an activating signal when detecting the voltage level change of the DC voltage. The control circuit is operable to receive the activating signal. The dummy load system is electrically connected to the control circuit, and the control circuit controls the dummy load system by generating a turn-on signal in response to receiving the activating signal. A dimmer system and a control method thereof are further disclosed in herein.12-20-2012
20110216564Eighteen Pulse Rectification Scheme For Use With Variable Frequency Drives - An AC/DC converter system comprises an input circuit for connection to a three phase AC source. An isolation transformer comprises a set of primary windings and first and second sets of secondary windings magnetically coupled to the set of primary windings. The first and second sets of secondary windings are phase shifted by select amounts from the set of primary windings. The set of primary windings is connected to the input circuit. An AC/DC converter comprises first, second and third three phase rectifiers, the first three phase rectifier being powered by the first set of secondary windings, the second three phase rectifier being powered by the second set of secondary windings, and the third three phase rectifier being powered by the input circuit. An impedance matching inductor is electrically connected between the input circuit and the third three phase rectifier. An output circuit is connected between the AC/DC converter and a DC load.09-08-2011
20100232193CAPACITIVE POWER SUPPLY - A capacitive power supply comprises an input section (09-16-2010
20090244943Power Converter - A power converter includes a small-sized inductor connected to an AC voltage input line for power factor correction and a filter for suppressing conduction noise. The inductor is connected to a rectifier and comprises first and second windings and that are wound on a common magnetic core and loosely coupled with each other. A leakage inductance component of the inductor functions as an energy storage element in a main conversion operation and an excitation inductance component of the inductor functions as a noise reduction element for suppressing an conduction noise caused by on-off operation of a switching element.10-01-2009
20100202175METHOD AND APPARATUS TO REDUCE AUDIO FREQUENCIES IN A SWITCHING POWER SUPPLY - A controller for use in a power supply regulator is disclosed. One controller includes a feedback circuit coupled to generate a feedback current signal that corresponds to a peak switching current in response to a sense signal from a power supply regulator output. A comparator is coupled to compare the feedback current signal with a reference voltage. A modulation circuit is coupled to the feedback circuit to generate a pulse width modulated switching signal with fixed switching frequency in response to the feedback current signal and the reference voltage. A multi-cycle modulator circuit is coupled to the output of the comparator. The multi-cycle modulator circuit is coupled to enable or disable a switch signal from the controller to be coupled to a switch of the power supply regulator. A group of two or more consecutive switching cycles is separated from a next group having two or more switching cycles by a time of no switching. The time of no switching is adjusted in closed loop to regulate a transfer of energy from a power supply regulator input to the power supply regulator output.08-12-2010
20100202173CIRCUIT ARRANGEMENT COMPRISING A VOLTAGE TRANSFORMER AND ASSOCIATED METHOD - A method for operating a circuit arrangement is provided. The method may include coupling a second connection of a control device to a connection that provides an alternating signal during operation of the circuit arrangement; in the control device: generating a trigger signal for the control electrode of the mode switch that is correlated with the sum signal from the signal at the connection for providing an alternating signal and the control signal; and providing the trigger signal at the output of the control device.08-12-2010
20130010509POWER SUPPLY DEVICE - According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to an output voltage to the load is provided in a rectified half period of the alternating-current power supply. The falling voltage chopper circuit includes at least one switching element configured to receive an input of the voltage after smoothing, operate in a section where the voltage after smoothing exceeds the output voltage, and pause in a section of the output voltage and a second capacitor provided on an output side and having a capacity larger than the capacity of the first capacitor.01-10-2013
20130010510POWER GENERATION INPUT DEVICE AND ELECTRONIC-APPARATUS USING THE POWER GENERATION INPUT DEVICE - First and second opposing ends are formed in a magnetic path forming member on which a power generation coil is wound. A rotating body has a permanent magnet, a first magnetization member and a second magnetization member. When an operating force does not act on an operating member, an end surface of the first magnetization member is opposed to the first opposing end via a gap and an end surface of the second magnetization member is opposed to the second opposing end via a gap. When the operating member is pressed, the rotating body rotates and when the force to the operating member is released, the operating member and the rotating body return. Since the rotating body and the magnetic path forming member do not come into contact with each other, the force required to operate the operating member is relatively weak and large electromotive force can be obtained.01-10-2013
20130016545AC-TO-DC CONVERSION APPARATUS AND RELATED CONTROL MANNER THEREOFAANM Xu; MingAACI NanjingAACO CNAAGP Xu; Ming Nanjing CNAANM Chen; Qiao-LiangAACI NanjingAACO CNAAGP Chen; Qiao-Liang Nanjing CN - An AC-to-DC conversion apparatus is provided, and which includes a first switch-element, an output capacitor and a bridgeless power-factor-correction (PFC) circuit. The bridgeless PFC circuit is coupled to an AC input, and includes a first inductor, a second inductor and a bridge circuit constructed by second to fifth switch-elements. The first switch-element is connected between bridgeless PFC circuit and the output capacitor. Under such circuit configuration and suitable control manner, the common-mode interference in the provided AC-to-DC conversion apparatus is lowered and thus reducing the power loss.01-17-2013
20110157943METHOD AND APPARATUS TO REDUCE LINE CURRENT HARMONICS FROM A POWER SUPPLY - A method and apparatus for controlling a power converter. In one aspect, a controller for use in a power converter includes a first calculator coupled to determine an end of an on time of a power switch of the power converter by integrating an input current to output an on time signal representative of the end of the on time of the power switch. The controller also includes a second calculator coupled to determine an end of an off time of the power switch by integrating a difference between an input voltage and an output voltage to output an off time signal representative of the end of the off time of the power switch.06-30-2011
20110157941SYNCHRONOUS VCC GENERATOR FOR SWITCHING VOLTAGE REGULATOR - A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control circuitry in an integrated circuit used to generate the pulse width modulated signal. The charging is stopped when either the charging current goes above a predetermined charging current level or when the capacitor voltage goes above a predetermined capacitor voltage.06-30-2011
20110157940POWER FACTOR CORRECTOR WITH HIGH POWER FACTOR AT LOW LOAD OR HIGH MAINS VOLTAGE CONDITIONS - Various exemplary embodiments relate to a power factor corrector for low loads and a related method. The power factor corrector raises power factor at low loads or high mains voltages by having the a greater amount of current delivered to the load during the falling time of the absolute value of the mains AC voltage than during the applicable rising time. Various embodiments achieve this by increasing the switch-on time of a control switch during the falling time so that the majority of the switch-on time during a mains period occurs during the falling time. This may involve using a timing voltage increasing over a period within each half mains cycle to increase the switch-on time of conversion cycles in the falling time. This may also involve shifting the power conversion in time domain during each half mains cycle so that a majority of the time occurs during the falling time. Various embodiments may employ both methods.06-30-2011
20120243277METHOD AND APPARATUS TO REDUCE LINE CURRENT HARMONICS FROM A POWER SUPPLY - In one aspect, a power converter includes a power switch, an energy storage element, a driver, a first calculator, and a second calculator. The first calculator coupled to determine an end of an on time of a power switch of the power converter by integrating an input current to output an on time signal representative of the end of the on time of the power switch. The second calculator coupled to determine an end of an off time of the power switch by integrating a difference between an input voltage and an output voltage to output an off time signal representative of the end of the off time of the power switch. The driver controls the power switch such that an input current of the power converter is substantially proportional to an input voltage of the power converter in response to the on time signal and the off time signal.09-27-2012
20080247205Controlling apparatus of an AC LED string - The invention relates to a controlling apparatus of an AC LED string, which includes a controller to control the string being capable of flickering or totally unflickering very easily. The apparatus can also connect an adjustable resistance for application on a string with various numbers of LEDs. The apparatus includes at least one set of a pair of slots with different shapes or sizes at output ends for connecting with the LED string correctively that obtains improvement and utilization.10-09-2008
20090129133Devices and Methods For Converting Alternating Current (AC) Power to Direct Current (DC) Power - Methods, circuit designs, systems, and devices for the conversion of high voltage alternating current (AC) to low voltage, high current direct current (DC) are described. An exemplary apparatus includes a rectifier for receiving a high voltage AC line power input and for outputting a full wave, high voltage DC, a gating component coupled to the rectifier for receiving the high voltage DC output by the rectifier, wherein the gating component is configured to gate the high voltage DC by turning on at a zero crossing level and turning off when the high voltage DC exceeds a preset voltage threshold and wherein the output of the gating component is an intermediate voltage DC capped by the preset voltage threshold, and a DC-DC converter coupled to the gating component for receiving the intermediate voltage DC output by the gating component, wherein the DC-DC converter is configured to step down and smooth out the intermediate voltage DC to a desired high current, low voltage DC output.05-21-2009
20130170264Systems And Methods For Providing AC/DC Boost Converters For Energy Harvesting - The present invention describes systems and methods for harvesting energy from an alternating magnetic field. An exemplary embodiment can include a flux concentrator having an open core coil wherein a first current with a first voltage is induced in the flux concentrator when placed proximate an alternating magnetic field. Additionally, the system can include a transformer, having a first and second winding, connected to the flux concentrator and inducing a second current in the second winding, wherein the second current has a second voltage higher than the first voltage and a threshold voltage of a first and second diode. Furthermore, the system can include a converter, connected to the secondary winding for charging the leakage inductance of the secondary winding by creating a short circuit between the secondary winding and the converter; and the diodes connected to the secondary winding and the converter for discharging the leakage inductance.07-04-2013
20080225564Organic Rectifier - The invention relates to an electronic device (09-18-2008
20130170261SELF-DISCHARGE CONTROL FOR AN EMI FILTER CAPACITOR - An independent bleeding integrated circuit device is provided to replace the bleeding resistor for an EMI filter capacitor, to establish a discharge path between the two terminals of the EMI filter capacitor when the EMI filter capacitor is disconnected from an AC power source, for discharging the EMI filter capacitor. When the EMI filter capacitor is connected with an AC power source, the discharge path is cut off to avoid power loss.07-04-2013
20130170262ELECTROMAGNETIC DEVICE FOR GENERATING ELECTRICAL CURRENT AND METHODS THEREOF - An energy harvesting device (EHD) and method including a hollow outer envelope (07-04-2013
20130170263TWO-WIRE LOAD CONTROL DEVICE FOR LOW-POWER LOADS - A two-wire load control device (such as, a dimmer switch or an electronic switch) for controlling the power delivered from an AC power source to an electrical load includes a controllably conductive device for controlling the power to the load, a microprocessor operable to generate a control signal that is representative of whether the load should be controlled on or off, a capacitor operable to produce a supply voltage for powering the microprocessor, a power supply that charges the capacitor when the controllably conductive device is non-conductive, and a control circuit that receives the control signal from the microprocessor. The control circuit is operatively coupled to the controllably conductive device for maintaining the controllably conductive device non-conductive after the beginning of each half-cycle until the magnitude of the supply voltage exceeds a predetermined threshold.07-04-2013
20080219036CLEAN INPUT UPS WITH FAST RECTIFIER CONTROL AND IMPROVED BATTERY LIFE - The present invention relates to the control of active rectifiers for UPS systems. Aspects of the present invention relate to a control algorithm that is implemented to realize a fast rectifier control operation that results in the improved life of a battery that is linked to the active rectifier of the UPS system. Within aspects of the present invention under unbalanced load conditions, it is possible to select (he desired behavior between the two possible extreme conditions, i.e. implement a clean power input that results in the reduced life of the battery or implement a non-clean power input resulting in the improved life of the battery. Additionally, the present invention utilizes fast rectifier control and specific feed-forward action to make it possible to obtain the very rigid control of a dc link voltage, even under extreme step load variations.09-11-2008
20120250383VOLTAGE ADJUSTING CIRCUIT, CONTACTLESS CARD AND CONTACTLESS CARD SYSTEM HAVING THE SAME, AND METHODS OF OPERATING THE VOLTAGE ADJUSTING CIRCUIT AND THE CONTACTLESS CARD - A voltage adjusting circuit is provided includes an inducing circuit configured to induce a voltage from electromagnetic waves, a first rectifying circuit configured to rectify an output voltage of the inducing circuit, a control circuit configured to control an output voltage of the first rectifying circuit in response to the output voltage of the first rectifying circuit, and a second rectifying circuit configured to simultaneously rectify and regulate the output voltage of the inducing circuit in response to the output voltage of the first rectifying circuit.10-04-2012
20130135910POWER FACTOR CORRECTION APPARATUS, DC/DC CONVERTER, AND POWER SUPPLYING APPARATUS - There are provided a power factor correction apparatus, a direct current/direct current (DC/DC) converter, and a power supplying apparatus, capable of preventing unstable feedback control due to a ripple component by controlling power switching based on a median value between a maximum value and a minimum value of a voltage level of the output power that is received as feedback. The power factor correction apparatus includes a power factor corrector switching input power and correcting a power factor thereof; and a controller detecting a voltage level of power factor-corrected power and controlling the switching of the power factor corrector, based on a median value between a maximum value and a minimum value of the voltage level of the power factor-corrected power detected for a predetermined period of time.05-30-2013
20110267861Signal Transmission Arrangement with a Transformer - A signal transmission arrangement includes a transformer with a first and a second winding. A damping circuit has an input terminal for receiving an input signal. The damping circuit is coupled to the first winding and is configured to have an electrical resistance that is dependent on the input signal. An oscillator circuit includes the second winding and is configured to provide an oscillating signal. An evaluation circuit is configured to receive the oscillating signal and to provide an output signal that is dependent on an amplitude of the oscillating signal.11-03-2011
20130170265POWER CONVERSION APPARATUS - A three-phase rectification circuit rectifies output voltage of a three-phase AC power supply, a step-up converter circuit steps up the output voltage, and a smoothing device smoothes the stepped-up output voltage. A voltage detection circuit detects output voltage Vo07-04-2013
20130128640SWITCH CONTROLLER, SWITCH CONTROL METHOD, AND POWER SUPPLY DEVICE COMPRISING THE SWITCH CONTROLLER - The present invention relates to a switch controller, a switch control method, and a power supply including the switch controller. An exemplary embodiment of the present invention detects an on-time of a power switch of the power supply and decreases a frequency of a clock signal according to a period during which the detected on-time is shorter than or equal to the minimum on-time. According to the exemplary embodiment, switching of the power switch is controlled according to a clock signal, and the minimum on-time is an on period of the power switch that cannot be shortened.05-23-2013
20130128641LOAD CONTROL DEVICE - A two-wire load control device prevents load malfunctioning, such as erroneous emission of an LED, due to a leak current, even when loads not taking countermeasures against noise are connected. The load control device is connected in series between a commercial power source and a load and an off power supply for ensuring an inner power supply at the time of turning off the load is provided with capacitors, which are switched to be connected in series or parallel, based on an input voltage. The control device makes the capacitors repeat charging and discharging, and a power discharged from the capacitors is used as the inner power supply, thereby reducing standby power requirement of the load control device at the time of turning off the load.05-23-2013
20130128639POWER SUPPLY SYSTEM WITH REDUCED POWER LOSSES, AN ELECTRONIC DEVICE AND A CONTROLLER - A power supply system (05-23-2013
20110273918POWER DEVICE - A power device includes two groups of diodes, a step-down circuit, and a capacitor. Each group of diodes includes a first diode and a second diode. An anode of the first diode is connected to a cathode of the second diode, a node between the first and second diode is connected to one of live lines and neutral lines of at least one alternating current source. The step-down circuit includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first and second input terminals are respectively connected to cathodes of the first diodes and anodes of the second diodes, the first and second output terminals are respectively connected to a power terminal and a ground terminal of a load. Two terminals of the capacitor are respectively connected to the first and second input terminals of the step-down circuit.11-10-2011
20130148396SYSTEM AND METHOD OF FEED FORWARD FOR BOOST CONVERTERS WITH IMPROVED POWER FACTOR AND REDUCED ENERGY STORAGE - A controller and controlling method is disclosed for a boost converter. The controller includes a first node for receiving an output sense signal indicative of an output DC voltage, a second node for receiving a boost current sense signal indicative of current through an inductor of the boost converter, a first combiner which provides an error signal based on a difference between the output sense signal and a reference signal, an integrator which integrates the error signal and which provides a compensation signal indicative thereof, and a pulse controller which provides a pulse control signal for controlling the power switch to operate the boost converter in DCM. The pulse controller develops pulse control signal based on comparing the compensation signal with a ramp signal and further adjusts the pulse control signal over a cycle of a rectified AC input voltage based on the boost current sense signal.06-13-2013
20100073977ELECTRIC POWER SUPPLY CIRCUIT AND PAM CONTROL METHOD FOR THE SAME - An increase in a ripple voltage of a capacitor in a smoothing circuit is prevented to achieve a compact capacitor and cost reduction for capacitors in an electric power supply circuit which performs PAM control using a switching element.03-25-2010
20110255319POWER SUPPLY DEVICE AND SEMICONDUCTOR DEVICE - Switching loss is reduced by decreasing the switching frequency of a PFC power supply in light load condition, whereas the switching frequency is maintained high in heavy load operation. Efficiency in light load operation is thus improved without enlarging a boosting inductor and an output smoothing capacitor. A capacitor is provided in a triangular wave generating circuit and the triangular wave generating circuit outputs a triangular wave by charging and discharging this capacitor. Charging and discharging of the capacitor are controlled by an oscillation frequency control circuit output current which is input to a comparator.10-20-2011
20120275204Bridgeless Power Factor Correcting Circuits with two Switches - Six, non-isolated, high-frequency, PWM dc-to-dc converters with two switches and bipolar output voltage are reported to perform power factor correction without requiring a bridge rectifier circuit on their input AC side. The first three of these converters have a voltage conversion ratio which is a singular function of the duty cycle and are used to obtain DC output voltages that are larger than the peak AC input voltage. The other three converters are the bilateral inverses of the first three which have a current conversion ratio which is a singular function of the duty cycle and are used to obtain DC output voltages that are significantly lower than the peak AC input voltage. No PFC circuits using only two switches have been known to the prior art.11-01-2012
20130155743POWER SUPPLY SWITCH APPARATUS - A power supply switch apparatus includes a voltage decreasing circuit, a rectification circuit, a comparison circuit, and a control circuit. The voltage decreasing circuit receives a first alternating voltage output from a power supply and converts the first alternating voltage to a second alternating voltage. The rectification circuit receives the second alternating voltage and converts the second alternating voltage to a first direct voltage. The voltage regulating circuit receives the first direct voltage and converts the first direct voltage to a second direct voltage. The comparison circuit receives the second direct voltage, compares the second direct voltage with a reference voltage, and outputs a control signal. The control circuit receives the control circuit and connects the power supply to different circuits according to the control circuit.06-20-2013
20130155742MICRO-POWER RECTIFIER AND METHOD THEREOF - A micro-power rectifier including a plurality of charge pumps and a method of the micro-power rectifier are provided. The charge pumps respectively include an input capacitor, an output capacitor, a first diode and a second diode. Wherein, at least one of reference voltages of the output capacitors is greater than 0V, and other reference voltages of the output capacitors is/are a ground voltage. Therefore, the efficiency and the output voltage of the rectifier can be increased.06-20-2013
20130155744Method and Device for Determining the Value of a Characteristic Quantity of a System for Powering a Load - This method determines the value of a characteristic quantity (U06-20-2013
20120281448POWER FACTOR CORRECTION CIRCUIT - The present invention relates to a power factor correction circuit, that can include: an inductor current detector that generates a sampling voltage signal, and sinusoidal half-wave current and voltage signals based on the sampling voltage signal; a mediate signal generator generating slope voltage and clock signals in response to the sinusoidal half-wave voltage signal, where a frequency of each varies with the sinusoidal half-wave voltage signal; a current modulation circuit receiving the sinusoidal half-wave current signal and a voltage feedback signal representative of a power stage output voltage to generate a regulation signal that is compared against the slope voltage signal to generate a modulation signal; and a logic/driving circuit receiving the modulation and clock signals, and generating a controlling signal that controls a power switch with variable frequency to maintain the inductor current in phase with the sinusoidal half-wave voltage signal and the power stage output voltage constant.11-08-2012
20110310647REDUNDANT PARALLEL NON-ISOLATED INPUT CONVERTERS - A redundant AC-DC power supply system and method is disclosed. A first AC-DC power converter is configured to generate a first output voltage and a first relay is configured to selectively couple and decouple the first AC-DC power converter to an output of an output circuit. A second AC-DC power converter is configured to generate a second output voltage. A second relay is configured to selectively couple and decouple the second AC-DC power converter to the output. A controller is configured to operate the first and second AC-DC power converters and the first and second relays to provide redundant sources of power for the output and to mitigate circulating current flow between the first and second AC-DC power converters.12-22-2011
20110310646CIRCULATING CURRENT DETECTION FOR REDUNDANT POWER SUPPLY - A system and method for detecting a circulating current in a redundant AC-DC power supply is disclosed. In one embodiment, a redundant AC-DC power supply system can include a first AC-DC power converter that is configured to generate a first DC output. A second AC-DC power converter is configured to generate a second DC output. An output circuit is configured to provide an output voltage based on at least one of the first and second DC outputs. A controller is configured to control the first and second AC-DC power converters for providing at least one of the first and second DC outputs to the output circuit, the controller being configured to detect a circulating current condition in at least one idle converter of first and second AC-DC power converters.12-22-2011
20120020134SWITCH CONTROL DEVICE, POWER SUPPLY DEVICE COMPRISING THE SAME AND SWITCH CONTROL METHOD - Provided are a switch control device, a switch control method, and a power supply device. 01-26-2012
20120020133SWITCH CONTROL DEVICE, POWER SUPPLY DEVICE COMPRISING THE SAME AND SWITCH CONTROL METHOD - Provided are a switch control device and a switch control method. The present invention generates power voltage required to operate the switch control device by using full-wave current rectification voltage generated by rectifying an AC input and detects a zero cross-point when a full-wave rectification voltage is zero voltage by using power voltage. The present invention generates a reference signal synchronized to the full-wave rectification voltage by using the detected zero cross-point and controls a switching operation of a power switch by comparing a reference signal with current which flows on the power switch.01-26-2012
20120020132POWER CONVERSION SYSTEM WITH ZERO-VOLTAGE START-UP MECHANISM, AND ZERO-VOLTAGE START-UP DEVICE - A power conversion system with zero-voltage start-up mechanism and a zero-voltage start-up device are disclosed. The system includes a power conversion circuit, a power factor correction unit, a storage capacitor, a storage switching unit, and a zero-voltage detection module. The storage switching unit is serially connected with the storage capacitor, and particularly controlled by the zero-voltage detection module. The zero-voltage detection module detects a timing as an input voltage is at low level, and then outputs a control signal to turn on the storage switching unit. Therefore, the present invention assures that the power conversion system is turned on when the input voltage is at the low level, in order to suppress the system from a surge current.01-26-2012
20120020131POWER APPARATUS AND METHOD OF SUPPLYING POWER - The present invention provides a power apparatus, which includes a switch unit, a bleeder resistor, a filter, a rectifier, a power factor corrector, an output capacitor, a rectifying diode, a surge absorber, a main power supply, and a standby power supply. Moreover, the AC power charges to the output capacitor by means of the rectifying diode and the surge arrester, such that the standby power supply generates a standby power while the switch unit is off. Furthermore, the AC power charges to the output capacitor through the switch unit, the bleeder resistor, the filter, the rectifier and the power factor corrector, such that the main power supply generates a main power while the switch unit is on. The present invention further provides a method of supplying power.01-26-2012
20120020130Series Power Module - A power module includes a switch portion operative to switch an alternating current (A/C) voltage, a rectifier portion operative to receive the switched A/C voltage, rectify the switched A/C voltage, and output a direct current (D/C) voltage, a power control module operative to receive the D/C voltage and to charge a voltage storage device, and a controller portion, configured to be powered by the D/C voltage from the voltage storage device, operative to receive an external control signal and control a state of the switch portion.01-26-2012
20130194849CONVERTER AND ELECTRIC GENERATOR - The converter includes a plurality of input lines and one or more output lines. Each input line is connected to a group of supply circuits and the supply circuits of each group are connected to different output lines. The electric generator comprises a stator and a rotor. The stator has a plurality of windings. Each winding has a plurality of phases. Each phase comprises bars connected in series. The phases have a first connection at one end, a second connection at the other end and a third connection in an intermediate position between the first and the second connection.08-01-2013
20130194848CURRENT-BALANCING IN INTERLEAVED CIRCUIT PHASES - A method for balancing an electrical parameter (e.g, a current or a voltage) between phases in a multi-phase interleaved circuit includes sensing the electrical parameter, demultiplexing the electrical parameter in accordance with a phase-select signal, sampling the demultiplexed components into a plurality of digital signals, generating an error signal based on a difference between the digital signals, and modulating the phase-select signal, as applied to the phases, in accordance with the error signal.08-01-2013
20090161397COMPUTER POWER SUPPLY - A power supply for a computer includes a transformer, a rectifier, a pulse width modulation (PWM) controller, a relay, a power switch, and a battery. The PWM controller includes a voltage terminal and a pulse terminal. The relay includes a switch and an inductance coil. An alternating current (AC) power supply is connected to a primary inductance coil of the transformer via the rectifier. A secondary inductance coil of the transformer provides a standby voltage. A positive voltage terminal of the rectifier is connected to the pulse terminal of the PWM controller via the primary inductance coil of the transformer. The switch is connected between the positive voltage terminal of the rectifier and the voltage terminal of the PWM controller. The inductance coil and the power switch are connected in series between the battery and ground. The power switch is controlled by powering on or off the computer.06-25-2009
20130201739MAGNETIC FLUX CONVERSION DEVICE - Embodiments provide a magnetic flux conversion device (MFCD) that may produce a regulated output signal with a target value (e.g., target voltage and/or target current) from a source signal on a power line. The MFCD may include a secondary stage configured to be inductively coupled with the power line. The source signal may cause a secondary electrical signal to flow in the secondary stage. A regulator module may be coupled to the secondary stage and configured to produce the output signal with the target value across output nodes by sensing the output signal and shunting the secondary stage if a value of the output signal is above the target value.08-08-2013
20120069616SWITCHING POWER SUPPLY DEVICE, AND ADJUSTABLE POWER SUPPLY SYSTEM INCLUDING THE SAME - According to one embodiment of the invention, there is provided a switching power supply device including a rectifying circuit and a switching operation conversion circuit. The rectifying circuit receives a phase-controlled alternating voltage to rectify to a direct voltage. The switching operation conversion circuit starts up by being applied with the direct voltage, and includes a normally on type switching element and an off driving circuit. The normally on type switching element passes an input current, and the off driving circuit turns off the switching element when the input current reaches a prescribed value. The switching operation conversion circuit converts the direct voltage to an output voltage different from the direct voltage by repeating a switching operation of turning on and off the switching element.03-22-2012
20120081939Arrangement For Exchanging Power - An arrangement for exchanging power, in shunt connection, with a three-phase electric power network includes a Voltage Source Converter having at least three phase legs with each a series connection of switching cells. Each switching cell has at least two semiconductor assemblies connected in series and having each a semiconductor device of turn-off- type and a rectifying element connected in anti-parallel therewith and at least one energy storing capacitor. A control unit is configured to control the semiconductor devices of each switching cell and to deliver a voltage across the terminals thereof being zero or U, in which U is the voltage across the capacitor. The control unit is also configured to calculate a value for amplitude and phase position for a second negative sequence-current or a zero-sequence voltage or a value of a dc current.04-05-2012
20120092914SWITCHING BRANCH FOR THREE-LEVEL RECTIFIER AND METHOD FOR CONTROLLING SWITCHING BRANCH FOR THREE-LEVEL RECTIFIER - A switching branch for a three-level rectifier and a method for controlling a switching branch for a three-level rectifier are provided. The switching branch includes a first diode and a second diode connected in series, a third diode and a fourth diode connected in series, a first controllable switch connected between a neutral DC output pole and a connection point between the first and the second diode, and a second controllable switch connected between the neutral DC output pole and a connection point between the third and the fourth diode. The switching branch includes means for controlling the first controllable switch to be in a conductive state during a reverse blocking state of the first diode and the second diode, and means for controlling the second controllable switch to be in a conductive state during a reverse blocking state of the third diode and the fourth diode.04-19-2012
20120092913PFC BOOSTER CIRCUIT - A power factor correction booster circuit for connection to an alternating current (AC) power source including a first circuit portion arranged to be active over a first AC half cycle of the power source, the first circuit portion including: a first AC input node in connection with a source node of a first power transistor, a first node of an inductive element in connection with a drain node of the first power transistor, a second node of the inductive element in connection with a drain node of a second power transistor, a second AC input node in connection with a source node of the second power transistor, an anode of a first semiconductor diode element in connection with the second node of the inductive element, a cathode of the first semiconductor diode element in connection with a first node of a first output capacitor element, and a second node of the first output capacitor element in connection with the second AC input node, wherein the first and second power transistors are controllable to switch the first circuit portion between a forward mode and a flyback mode, such that in the forward mode the inductive element stores energy from the AC power source, and in the flyback mode the stored energy from the inductive element is transferred to the first output capacitor through the first semiconductor diode element.04-19-2012

Patent applications in class Diode