Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Using semiconductor-type converter

Subclass of:

363 - Electric power conversion systems

363013000 - CURRENT CONVERSION

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
363125000 In rectifier systems 465
363131000 In transistor inverter systems 331
363124000 In chopper converter systems 35
363135000 In thyristor inverter systems 4
20100165688CASCADED FLYING CAPACITOR MODULAR HIGH VOLTAGE INVERTERS - A high voltage inverter is provided which includes a plurality of k-level flying capacitor H bridge modules, k being greater than 2, each having a positive dc terminal, a negative dc terminal, and two ac terminals, a connecting unit for connecting said ac terminals of said plurality of k-level flying capacitor H bridge modules in series to form a cascading set of modules, and a dc source connected to an ac source and having a transformer, a rectifier rectifying an output voltage of said transformer, and a capacitor connected between the positive and negative dc terminals.07-01-2010
20090097293HIGH-FREQUENCY POWER SUPPLY - A plurality of half-wave bridge type oscillators are operated in a time-sharing method and connected through primary windings of a transformer to make the reverse bias hold time of each thyristor long. Therefore, it is possible to stably output a frequency and power which are several times as high as those in a conventional power supply.04-16-2009
20090244947Method and apparatus for resetting a silicon controlled rectifier bridge - A method and an apparatus for resetting at least one Silicon Controlled Rectifier (SCR) in an H-bridge. The apparatus comprises a current interruption device for controlling current flow through the H-bridge, and a negative voltage detector for detecting a negative voltage at the H-bridge and driving the current interruption device to control the current flow through the H-bridge.10-01-2009
20110222327Photovoltaic Inverter Power System - A photovoltaic system may include a DC to AC inverter including a minimum operating power setting and a microprocessor for calculating a maximum available power output for a photovoltaic array.09-15-2011
Entries
DocumentTitleDate
20100157635PREDICTIVE CURRENT CONTROL IN DRIVING A LOAD IN A PWM MODE - A pulse width modulated current control method and system architecture may achieve the high performance of an advanced current control for full-bridge stages, in terms of accuracy, error, speed, and frequency response, but with a reduced complexity in terms of used analog circuits, being comparable with that of an elementary peak current control. The only analog blocks used may be a current sense transducer, i.e. a series resistor or a sense-FET, and a comparator for the current sensing while the rest of the control circuitry is digital.06-24-2010
20090122583Corona discharge apparatus - An apparatus for producing a corona discharge and a method for producing a corona discharge is described. The apparatus comprises a voltage controlled oscillator (VCO) for producing an audio signal at an adjustable frequency. The VCO is controlled by a ramp generator, and the ramp generator causes the voltage controlled oscillator to continually adjust the frequency of the audio signal. The audio signal modulates a carrier signal produced by a pulse width modulated oscillator and the modulated carrier signal is provided to a coil assembly. The coil assembly is matched to the frequency of the carrier signal and produces a high voltage AC charge from the audio signal. A discharge pin discharges the high voltage AC charge in the form of an ionized corona from the coil assembly.05-14-2009
20130039104BIDIRECTIONAL MULTIMODE POWER CONVERTER - The present invention is directed to Bidirectional Multimode Power Converter which employs a high frequency dynamically varying amplitude modulation and voltage steering method to convert the source AC or DC voltages to output AC or DC voltages, with programmable output voltage levels, output voltage frequency and duration. The inrush current control, turning off the idle converter, line voltage brown out protection, soft start, high pre-charge voltage generation, soft shut down of converter, dimming operation modes are inherent characteristics of the Bidirectional Multimode power converter. The Bidirectional Multimode Power Converters of the present invention facilitates bidirectional conversion and coupling multiple bidirectional sources and or loads.02-14-2013
20130039103POWER-CONVERTING APPARATUS HAVING IMPROVED ELECTRO-THERMAL CHARACTERISTICS - A power-converting apparatus, such as a power module, may include a base plate (02-14-2013
20130083576POWER SEMICONDUCTOR SWITCH SERIES CIRCUIT AND CONTROL METHOD THEREOF - The present disclosure provides a power semiconductor switch series circuit. The power semiconductor switch series circuit includes a plurality of series modules and a system control module. Each series module has a power semiconductor switch; a drive module for driving each power semiconductor switch to be turned on or turned off; a short-circuit detection unit for outputting at least one detection signal; an equalizer circuit; a comparison module for comparing the detection signal with a predetermined threshold, and outputting a short-circuit signal when the detection signal exceeds the predetermined threshold; and a soft turn-off module for receiving the short-circuit signal and outputting a second control signal. The system control module receives the short-circuit signal and outputs a first control signal.04-04-2013
20110013433Systems, Methods, and Apparatus for Converting Direct Current (DC) Power to Alternating Current (AC) Power - Embodiments of the invention can provide systems, methods, and apparatus for converting direct current (DC) power to alternating current (AC) power. According to one embodiment, a system for converting DC power to AC power can be provided. The system can include a DC power source that provides a first DC power signal to a converter. Coupled to the converter can be a controller for transforming the first DC power signal into a plurality of AC power signals. The controller can also phase shift at least one of the plurality of AC power signals and combine the phase shifted AC power signal with at least one of the other of the plurality of AC power signals to provide a second DC power signal. The controller can also convert the second DC power signal to an AC power signal.01-20-2011
20130063994POWER CONVERSION WITH ADDED PSEUDO-PHASE - Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. This provides a “pseudo-phase” drive capability which expands the capabilities of the converter to compensate for zero-crossings in a single-phase power supply.03-14-2013
20120113698POWER CONVERSION DEVICE - Disclosed is a power conversion device, wherein among the optical fiber cables used in control/communication, at least the majority of high-voltage optical fiber cables with a dielectric strength against the output voltages of a plurality of cells can be eliminated and thus a low-voltage optical fiber cable with a dielectric strength against the output voltage of one cell can be used. Furthermore, here, the length required for the optical fiber cable can be reduced. A controller of the power conversion device comprising a plurality of cascade-connected cells comprises a central controller, and a cell controller with the same potential as each cell, the cell controller being installed in the vicinity of each cell, wherein the central controller and each cell controller are daisy-chained using an optical fiber cable.05-10-2012
20110141780Digital Pulse Width Modulator06-16-2011
20100265744POWER SEMICONDUCTOR MODULE - A power semiconductor module includes at least two power semiconductor units that are interconnected and that have controllable semiconductors. Each semiconductor unit is associated with a cooling plate to which the semiconductors are connected in a heat-conducting manner. The object is to provide a semiconductor module that is compact and cost-effective and at the same time explosion-proof. The power semiconductor module of the invention has a module housing which houses the power semiconductor units. The cooling plates form at least part of the module housing.10-21-2010
20100085787SYSTEM AND METHOD FOR POWERING A HYBRID ELECTRIC VEHICLE - A drive system including a first bus, a second bus, an AC bus, an energy storage device coupled to the first bus, the energy storage device configured to output a stored DC voltage to the first bus and configured to receive a charging voltage from the first bus, and a power converter electrically coupled between the first bus and the second bus, the power converter configured to convert a DC voltage on the first bus to a DC voltage suitable for the second bus and configured to convert a DC voltage on the second bus to a DC voltage suitable for the first bus and suitable for charging the energy storage device. The system further includes a voltage inverter coupled between the second bus and the AC bus, the voltage inverter configured to invert a DC voltage on the second bus to an AC voltage suitable for the AC bus and configured to invert an AC voltage on the AC bus to a DC voltage suitable for the second bus to supply the DC voltage to the first bus.04-08-2010
20090046489Insulated transformers, and power converting device - An insulated transformer, which can suppress aging deterioration and can reduce the influence of noise caused by external magnetic flux, while improving reliability and environmental resistance, and can send and receive signals while electrically insulating a low-voltage side and a high-voltage side. A secondary coil is formed on a semiconductor substrate, and a primary coil is formed on one face of a glass substrate. The primary coil fixes the glass substrate formed on one face onto the semiconductor substrate through the other face of the glass substrate by an adhesive layer.02-19-2009
20090103340Inverter, more specifically for photovoltaic plants - On an inverter (04-23-2009
20080205106Power Supply Device For Vehicle - A power supply device for a vehicle is provided with: a battery serving as an electric storage device; a connection unit for receiving electric power provided from a power generation device for wind power generation, for example, and charging the electric storage device, the power generation device being provided outside the vehicle and exhibiting fluctuations in electric power generated thereby; and an electric power conversion unit which, during driving, operates as a load circuit and which, during charging for receiving electric power from the power generation device, senses fluctuations in voltage, and converts the electric power to obtain a current and a voltage suitable for charging the electric storage device. The electric power conversion unit includes a control device controlling first and second inverters such that electric power provided to first and second terminals is converted into direct-current electric power and provided to the electric storage device.08-28-2008
20120092912COMMUTATION METHOD OF AN ELECTRONIC POWER CONVERTER PHASE WITH REVERSE-CONDUCTING IGBTS - The invention relates to a method for commutating from a reverse-conducting IGBT (T1) operated in the diode mode to a reverse-conducting IGBT (T2) operated in the IGBT mode. According to the invention the reverse-conducting IGBT (T1) operated in the diode mode is turned off only at the instant a current starts to flow in the reverse-conducting IGBT (T2) operated in the IGBT mode. Accordingly said commutation method is event-driven, as a result of which it is less sensitive to poorly toleranced operating times.04-19-2012
20090052214Insulating transformer and power conversion device - An insulating transformer includes a semiconductor substrate, an insulating substrate, a primary winding provided on one of the semiconductor substrate and the insulating substrate, a secondary winding provided on other of the semiconductor substrate and the insulating substrate, and an insulating spacer layer provided in between the semiconductor substrate and the insulating substrate for insulating and separating the primary winding and the secondary winding. The primary winding and the secondary winding are disposed to face each other. The insulating spacer layer maintains a constant interval between the semiconductor substrate and the insulating substrate.02-26-2009
20090201706Apparatus for feeding electrical energy into a power grid and DC voltage converter for such an apparatus - The apparatus for feeding electrical energy into a power grid (08-13-2009
20120188807STACKED STRUCTURE OF POWER CONVERSION APPARATUS - A stacked structure of a power converter is disclosed. The stacked structure has a power conversion circuit that provides an output or input of alternating current in three phases and is composed of odd-numbered parallel-connected power semiconductor element modules for each phase, and a heat sink for cooling the power semiconductor element modules. An odd number of the parallel-connected power semiconductor element modules are arranged in a first phase and a third phase, and an even number of the parallel-connected power semiconductor element modules are arranged in a second phase respectively in two rows on the heat sink relative to a ventilation direction of air for cooling the heat sink.07-26-2012
20100321966SEMICONDUCTOR SWITCH AND POWER CONVERSION SYSTEM PROVIDED WITH SEMICONDUCTOR SWITCH - A semiconductor switch is provided with a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage, an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element, and a high-speed freewheel diode having a withstand voltage equal to that of the main element, wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define the positive pole of the main element as a positive pole terminal and the positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction.12-23-2010
20100165681SEMICONDUCTOR DEVICE AND POWER CONVERTER USING THE SAME - In a driving circuit, for controlling the turning on and off of a main semiconductor switching device of an insulated gate type, in an insulated gate semiconductor switching device for electric power conversion, bipolar semiconductor devices of an insulated gate control type, particularly insulated gate bipolar transistors (IGBTs) are used at the output stage of a circuit that controls the gate voltage of the main semiconductor switching device.07-01-2010
20110157938ALTERNATING CURRENT-DIRECT CURRENT CONVERTER DEVICE - In the present invention, switching circuits connected in middle points of power supply lines of a three-phase alternating-current power supply are switched to cause currents to intermittently flow on primary windings of a transformer, a voltage generated on a secondary winding is rectified and smoothed, and then is outputted to a load. The switching circuits each include: a series circuit including a first primary winding, a bidirectional switch and a second primary winding, which are connected in series in this order; a drive circuit power supply generating circuit generating a direct-current positive voltage and a direct-current negative voltage by use of an alternating-current power supply voltage applied between two ends of the series circuit; and a drive circuit performing on-off drive of the bidirectional switch. A reference potential point of the bidirectional switch is connected to a reference potential point of the drive circuit power supply generating circuit.06-30-2011
20080205107Integrated-inverter electric compressor - An object is to provide an integrated-inverter electric compressor that can enhance assembly and vibration resistance of power semiconductor switching devices and control substrates thereof constituting the inverter device. The integrated-inverter electric compressor, in which an inverter device is installed in an inverter container provided on an outer circumference of a housing, includes a plurality of IGBTs constituting the inverter device and a guide member having a plurality of guide holes for passing terminals of the IGBTs provided between the control substrate and the IGBTs. The guide member is provided with at least one first positioning pin, fitted in positioning holes provided in a mounting surface of the IGBT, in one side surface facing the IGBT, and at least one second positioning pin, fitted in positioning holes provided in the control substrate, in another side surface facing the control substrate.08-28-2008
20110019448SWITCHING POWER SUPPLY APPARATUS - Provided is a switching power supply apparatus capable of suppressing heat generation from a power supply to improve the efficiency of conversion during a power supply operation and accurately detecting only a current flowing through a load to achieve more stabile control. Since a first closed loop made up of a fourth diode (01-27-2011
20110164441MULTI-TORROID TRANSFORMER - A transformer comprises a secondary winding including a plurality of coaxially arranged toroidal closed magnetic circuits connected in series within an enclosure and a primary winding comprising a plurality of turns including electrically conducting members passing axially through the toroidal closed magnetic circuits, respective ones of the plurality of electrically conducting members being electrically connected by respective electrically conducting strip lines passing along walls of the enclosure to form the continuous primary winding.07-07-2011
20100165680POWER CONVERSION APPARATUS - An inverter module has a first inverter driving a first electric load and a second inverter driving a second electric load, mounted on a common insulation substrate. In the first inverter, the arms of the U, V and W phases are arranged on the insulation substrate such that arms adjacent in the horizontal direction in the drawing are located displaced from each other in the vertical direction in the drawing. In the second inverter, the arms of the U, V and W phases are arranged on the insulation substrate such that arms adjacent in the horizontal direction in the drawing are displaced from each other in the vertical direction in the drawing. Moreover, the arm of the first inverter and the arm of the second inverter are arranged to be adjacent along the horizontal direction in the drawing. By such an arrangement, the in-plane temperature distribution can be rendered uniform without having to increase the area occupied by the insulation substrate.07-01-2010
20100067272Universal Power Converter - Methods and systems for transforming electric power between two or more portals. Any or all portals can he DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of bi-directional conducting and blocking semiconductor switches which alternately connect an inductor and parallel capacitor between said portals, such that energy is transferred into the inductor from one or more input portals and/or phases, then the energy is transferred out of the inductor to one or more output portals and/or phases, with said parallel capacitor facilitating “soft” turn-off, and with any excess inductor energy being returned back to the input. Soft turn-on and reverse recovery is also facilitated. Said hi-directional switches allow for two power transfers per inductor/capacitor cycle, thereby maximizing inductor/capacitor utilization as well as providing for optimum converter operation with high input/output voltage ratios. Control means coordinate the switches to accomplish the desired power transfers.03-18-2010
20130194847UNIVERSAL POWER CONVERSION METHODS AND SYSTEMS - Universal electrical power conversion methods and systems which may provide the combined capabilities of symmetrical and asymmetrical conversion, bidirectionality, and simplicity are provided. In some cases, the converter charges an inductor connected in parallel between a regulated port and an unregulated port using energy stored by a capacitor positioned in parallel between the inductor and one of the ports until the inductor has a level of current stored that corresponds to the change in voltage desired at the regulated port, then discharges stored energy into the other port until a current cutoff threshold level is reached in the inductor. Creating an LC tank circuit during conversion allows conversion processes to traverse sinusoidal discharge patterns. In some embodiments, the inductor is precharged with current to affect the discharge of the inductor. Multiple ports can be connected and disconnected from the same inductor with these methods and systems.08-01-2013
20110051478POWER CONVERSION DEVICE - A three-level PWM converter (03-03-2011
20120307534COMPOUND SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME - An AlGaN/GaN-HEMT has a structure including: compound semiconductor layers formed on a substrate; a gate electrode, a gate pad that has a current path formed between the gate electrode and itself, and a semiconductor layer that is spontaneously polarized and piezoelectrically polarized, which are formed on the compound semiconductor layer; and a gate electrode connection layer formed on the semiconductor layer, wherein the gate electrode connection layer and the gate electrode are electrically connected with each other. This structure which is relatively simple allows the AlGaN/GaN-HEMT to realize an intended normally-off operation without causing such inconveniences as increase in a sheet resistance, increase in an on-resistance, and increase in a leakage current.12-06-2012
20120039102WIRELESS POWER TRANSFER TERMINAL - This disclosure provides a wireless power transfer terminal that enables a power device to be used for both power transmission and power reception and allows space savings of circuits and a reduction in the cost of manufacturing. The wireless power transfer terminal includes first through fourth switching elements, a coil, and a control circuit. Each of two sets of switching elements forms a series circuit, and the two sets are connected in parallel to each other. The coil is connected between connection points of the switching elements of the series circuits. The control circuit performs switching control of the first to fourth switching elements in a power transmission mode and in a power reception mode.02-16-2012
20120008353Universal Power Converter - Methods and systems for transforming electric power between two or more portals. Any or all portals can be DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of bi-directional conducting and blocking semiconductor switches which alternately connect an inductor and parallel capacitor between said portals, such that energy is transferred into the inductor from one or more input portals and/or phases, then the energy is transferred out of the inductor to one or more output portals and/or phases, with said parallel capacitor facilitating “soft” turn-off, and with any excess inductor energy being returned back to the input. Soft turn-on and reverse recovery is also facilitated. Said bi-directional switches allow for two power transfers per inductor/capacitor cycle, thereby maximizing inductor/capacitor utilization as well as providing for optimum converter operation with high input/output voltage ratios. Control means coordinate the switches to accomplish the desired power transfers.01-12-2012
20120014151Power Conversion with Added Pseudo-Phase - Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. This provides a “pseudo-phase” drive capability which expands the capabilities of the converter to compensate for zero-crossings in a single-phase power supply.01-19-2012
20100246224Power supply for negative voltage load - A power supply for a negative voltage load has a switch-mode power unit, a monitoring unit, a first auxiliary power unit and a second auxiliary power unit. The switch-mode power unit has a rectifying circuit, a power factor correction circuit, a DC to DC power circuit. The first auxiliary power unit is connected to output terminals of the power factor correction circuit and converts DC power to a first DC power for driving the monitoring unit. The second auxiliary power unit is connected to the negative voltage load in parallel and converts negative power from the negative voltage load to a second DC power for driving the monitoring unit when AC power is interrupted. Since the first and the second auxiliary power unit do not work at the same time, the power supply can effectively enhances the conversion efficiency of the power supply.09-30-2010
20120250380ELECTRIC POWER CONVERSION APPARATUS - An electric power conversion apparatus includes a plurality of semiconductor modules, a frame, a control circuit board, and a reinforcing and fixing member. Each of the semiconductor modules has a plurality of control terminals. The frame receives the semiconductor modules therein. The frame has, at least, a pair of side walls that face each other with the semiconductor modules interposed therebetween. The control circuit board is located outside of the frame and has the control terminals of the semiconductor modules connected thereto. The reinforcing and fixing member extends to connect the side walls of the frame, thereby reinforcing the frame. The reinforcing and fixing member also has the control circuit board fixed thereto so that the reinforcing and fixing member is positioned between the control circuit board and the semiconductor modules.10-04-2012
20120081938DISCHARGING A CAPACITANCE PROVIDED AT THE OUTPUT OF AN INVERTER - A method and device to discharge a filter capacitance at the output of an inverter for feeding electrical power from a generation unit into a grid via a grid connect switch is disclosed. The grid connect switch has a generation unit side and a grid side, and via AC grid terminals on the grid side of the grid connect switch, the filter capacitance is connected to at least one of the AC grid terminals. A voltage applied across the filter capacitance is rectified independent of a polarity thereof, and a rectified voltage of a fixed polarity is provided, and a DC voltage link of a power supply unit for supplying power to circuitry of the inverter is charged with this rectified voltage.04-05-2012
20120320645Power Converter - A power converter which has a power module allowing supply and cutoff of main current, and a driver module controlling supply and cutoff of the main current allowed by the power module includes: a high potential side semiconductor device which allows supply and cutoff of the main current on the high potential side of the power module; a low potential side semiconductor device which allows supply and cutoff of the main current on the low potential side of the power module, and is connected with the high potential side semiconductor device in series; plural power module side wirings connected with respective electrodes contained in the high potential side semiconductor device and the low potential side semiconductor device, and disposed adjacent to each other substantially on the same plane as the power module in the order of applied potentials with a connection end between the plural power module side wirings and the driver module located along the end of the power module; plural driver module side wirings provided on the driver module as wirings connected with the plural corresponding power module side wirings, and disposed adjacent to each other substantially on the same plane as the driver module in the order corresponding to the positions of the plural power module side wirings in positions along the end of the driver module; a power source transformer as a circuit which converts a signal voltage for controlling the supply and cutoff of the main current by the driver module into voltage applied to a control electrode of the high potential side semiconductor device and a control electrode of the low potential side semiconductor device, plural terminals of the power source transformer in correspondence with the plural driver module side wirings being provided in the order of the positions of the plural corresponding driver module side wirings; and conductors disposed in the vicinity of the plane on which the plural power module side wirings are provided and in the vicinity of the plane on which the plural driver module side wirings are provided, and electrically connected in such positions as to surround magnetic flux generated by current looping at least through the power source transformer, the driver module side wirings, and the power module side wirings.12-20-2012
20120268975Power Conversion with Current Sensing Coupled through Saturating Element - An architecture for current-modulating power-handling circuits, such as power converters, where a small saturating inductance is used to obtain a pulse edge when the main current value crosses zero.10-25-2012
20120287688FOUR QUADRANT BIDIRECTIONAL SWITCH - A four quadrant bidirectional switch. In one embodiment, the four quadrant bidirectional switch comprises a first switch, a second switch, and a third switch, wherein (i) the first and second switches are normally-off switches, (ii) the third switch is a dual-gate, bidirectional, normally-on switch, and (iii) the first, the second, and the third switches are coupled to one another in a bi-cascode configuration.11-15-2012
20100085788Device for Feeding Electric Energy Into A Power Grid And DC Converter For Such A Device - The device is for feeding electricity into a power grid (04-08-2010
20080225563METHOD AND APPARATUS TO CONTROL VOLTAGE CONVERSION MODE - A method and apparatus to control a voltage conversion mode in a voltage converter are provided. The apparatus to control a voltage conversion mode includes: a voltage converter which converts an input voltage to an output voltage and having a plurality of voltage conversion modes; an input sensor which detects an input current value that is input to the voltage converter from a voltage source; an output sensor which detects an output current value that is output to a load from the voltage converter; and a controller which determines a power efficiency of the voltage converter based on the input and output current values and which switches between the voltage conversion modes of the voltage converter according to the detected power efficiency. Accordingly, an efficiency of voltage conversion is maximized, and a usage time of a mobile device can be lengthened.09-18-2008
20130141958MANAGEMENT SYSTEM FOR VARIABLE-RESOURCE ENERGY GENERATION SYSTEMS - The object of the invention is to provide an energy management system for variable resource energy generating systems, which incorporates means for the storing of energy and the management thereof. The system permits the needs which arise in the power grid to be met, and participates in the regulation of the power grid and contributing to the stability and quality thereof.06-06-2013
20130114316Power Transfer Devices, Methods, and Systems with Crowbar Switch Shunting Energy-Transfer Reactance - The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for example, polyphase AC), the input and output switches are opened, and a crowbar switch shunts the inductance which is used for energy transfer. This prevents this inductance from creating an overvoltage when it is disconnected from outside lines.05-09-2013
20130114315Power Transfer Devices, Methods, and Systems with Crowbar Switch Shunting Energy-Transfer Reactance - The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for example, polyphase AC), the input and output switches are opened, and a crowbar switch shunts the inductance which is used for energy transfer. This prevents this inductance from creating an overvoltage when it is disconnected from outside lines.05-09-2013
20130148395CONVERTER - A converter has converting groups with a first stage connected to input lines thereof and a second stage connected to output lines. The first and second stages have positive and negative branches that are connected together.06-13-2013
20130182478REACTOR, CONVERTER, AND ELECTRIC POWER CONVERTER - A small reactor with high heat-release performance is provided. A reactor 07-18-2013
20120020129Universal Power Converter - Methods and systems for transforming electric power between two or more portals. Any or all portals can be DC, single phase AC, or multi-phase AC. Conversion is accomplished by a plurality of bi-directional conducting and blocking semiconductor switches which alternately connect an inductor and parallel capacitor between said portals, such that energy is transferred into the inductor from one or more input portals and/or phases, then the energy is transferred out of the inductor to one or more output portals and/or phases, with said parallel capacitor facilitating “soft” turn-off, and with any excess inductor energy being returned back to the input. Soft turn-on and reverse recovery is also facilitated. Said bi-directional switches allow for two power transfers per inductor/capacitor cycle, thereby maximizing inductor/capacitor utilization as well as providing for optimum converter operation with high input/output voltage ratios. Control means coordinate the switches to accomplish the desired power transfers.01-26-2012
20130194846UNIVERSAL SINGLE-STAGE POWER CONVERTER - A universal electrical power converter having the combined capabilities of symmetrical and asymmetrical converters, bidirectionality, and simplicity is provided with methods for controlling it in single-stage conversion. In some cases, the converter charges an inductor connected in parallel between a regulated port and an unregulated port using energy stored by a capacitor positioned in parallel between the inductor and one of the ports until the inductor has a level of current stored that corresponds to the change in voltage desired at the regulated port, then discharges stored energy into the other port until a current cutoff threshold level is reached in the inductor. In some embodiments a single stage power converter is provided having three or more ports that can be connected and disconnected from the same inductor. Converters disclosed herein can convert AC signals when there is cross switching on at least one side or branch of the converter.08-01-2013
20120033470METHOD OF CONTROLLING POWER CONVERSION DEVICE - A correction-term adder 1 compares a maximum value max(V*) with an absolute value of a minimum value min(V*). The correction-term adder 1 selects a signal 1−max(V*) when the maximum value max(V*) is larger than the absolute value of the minimum value min(V*), on the other hand, selects a signal −1−min(V*) when the absolute value of the minimum value min(V*) is larger than the maximum value max(V*). Thereby, a signal of correction amount α is calculated. Moreover, the correction-term adder 1 produces a triangular-wave-shaped signal k(max(V*)+min(V*)) by multiplying a gain k by an addition signal max(V*)+min(V*) of the maximum value max(V*) and the minimum value min(V*). This triangular-wave-shaped signal k(max(V*)+min(V*)) is synchronized with the correction amount α. The correction-term adder 1 produces a correction amount β by selecting smaller one in absolute value between the triangular-wave-shaped signal k(max(V*)+min(V*)) and the correction amount α, and adds the correction amount β to the voltage command values V*02-09-2012

Patent applications in class Using semiconductor-type converter

Patent applications in all subclasses Using semiconductor-type converter