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CAPACITOR CHARGING OR DISCHARGING

Subclass of:

320 - Electricity: battery or capacitor charging or discharging

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
320167000 For large capacitance (e.g., "super" capacitor, memory backup capacitor, etc.) 45
Entries
DocumentTitleDate
20090237036FREQUENCY SYNTHESIZER AND LOOP FILTER USED THEREIN09-24-2009
20090195220RECOVERABLE ULTRACAPACITOR ELECTRODE - An exemplar method of recovering a capacitance level of a double layer capacitor is disclosed. Further implementations describe making electrodes and double layer capacitors that provide a recovery of capacitance after that capacitor has undergone a fade in capacitance. In one implementation, for example, methods of treating a double layer capacitor are provided that allow for recovery of capacitance in the double layer capacitor. In these methods, capacitance of the double layer capacitor may be recovered after it has faded. After a double layer capacitor has experienced capacitance fade, the double layer capacitor may be rested in an unloaded condition and/or heated to recover at least a portion of its lost capacitance. Recovering faded capacitance both increases the energy storage capacity available during each charge/discharge cycle of the capacitor and increases the useful life of the double layer capacitor by delaying the capacitance fade below a particular level that is deemed a failure for a particular application.08-06-2009
20090195221Capacitor charger with a modulated current varying with an input voltage and method thereof - In a capacitor charger including a transformer having a primary winding connected with an input voltage and a secondary winding for transforming a primary current flowing through the primary winding to a secondary current flowing through the secondary winding, the primary current is adjusted according to a monitoring voltage varying with the input voltage, thereby prolonging the lifetime of the battery that provides the input voltage and improving the power efficiency of the battery.08-06-2009
20100026248Rapid Transfer of Stored Engery - A disclosed method (and system) corresponds to rapidly charging a rechargeable device. An embodiment of the method comprises charging a first supercapacitor attached to a charging unit. In response to the device coupling to the charging unit, determining whether the charging unit is authorized to charge the device. The first supercapacitor discharging in response to the determining that the charging unit is authorized to charge the device, the discharging of the first supercapacitor resulting in a first current being generated. The first current is transferred to the device through an output of the charging unit for charging a second supercapacitor included in the device. The amount of the first current generated is regulated. In response to the to the voltage at the output increasing at a rate above a set threshold, reducing the rate at which the voltage is increasing.02-04-2010
20100072957Nanotube-based logic driver circuits - Nanotube based logic driver circuits. These include pull-up driver circuits, push-pull driver circuits, tristate driver circuits, among others. Under one embodiment, an off-chip driver circuit includes a differential input having first and second signal links, each coupled to a respective one of two differential, on-chip signals. At least one output link is connectable to an off-chip impedance load, and at least one switching element has an input node, an output node, a nanotube channel element, and a control structure disposed in relation to the nanotube channel element to controllably form and unform an electrically conductive channel between said input node and said output node. The input node is coupled to a reference signal and the control structure is coupled to the first and second signal links. The output node is coupled to the output link, and the channel element is sized to carry sufficient current to drive said off-chip impedance load.03-25-2010
20130076315CAPACITOR DISCHARGE CIRCUIT AND POWER CONVERTER - The present disclosure discloses a capacitor discharge circuit and a power converter. The capacitor discharge circuit includes a detection circuit and a discharge loop; the detection circuit has input ends electrically connected with input ends of an AC power supply, and an output end outputting a discharge detection signal to an input end of the discharge loop; the discharge loop is electrically connected with both ends of the capacitor that needs to be discharged and includes a switch unit and an energy consumption unit. When the AC power supply is disconnected, the discharge detection signal switches on the switch unit to conduct the discharge loop, such that the energy consumption unit discharges the capacitor that needs to be discharged. The present disclosure also provides a power converter including the capacitor discharge circuit. The present disclosure can reduce the power consumption caused by discharging the capacitor that needs to be discharged.03-28-2013
20130033236SYSTEMS AND METHODS FOR DISCHARGING AN AC INPUT CAPACITOR WITH AUTOMATIC DETECTION - System and method for discharging a capacitor. An example system includes a signal detector and a discharge control component. The signal detector is configured to receive an input signal and generate a detection signal based on at least information associated with the input signal, the input signal being associated with an alternate current signal received by a capacitor including a first capacitor terminal and a second capacitor terminal. The discharge control component configured to receive at least the detection signal and generate an output signal to discharge the capacitor if the detection signal satisfies one or more conditions.02-07-2013
20100045244METHOD AND DEVICE FOR CHARGING A CAPACITIVE ELEMENT - A method and device for charging and/or discharging a capacitive element. A controllable switch is driven to interrupt the charging current when the charging current exceeds a predetermined charging-current threshold. The charging-current threshold is altered while the capacitive element is being charged to the predefined charging voltage. The controllable switch is driven again for coupling the charging current into the capacitive element if a predefined period of time after a previous activation of the controllable switch has elapsed, and/or in case the charging current drops below the predetermined charging-current threshold. A discharging process is carried out correspondingly.02-25-2010
20130038298CHARGE RECYCLING CIRCUIT - A charge recycling circuit is configured to recycle charges which are discharged by a driving circuit during a discharge period and provide the recycled charges for charging the driving circuit during a charge period. Power consumption in the driving circuit may thus be reduced.02-14-2013
20130038299NANO GENERATOR AND METHOD OF MANUFACTURING THE SAME - A nanogenerator with at least one nanostructure and method of manufacturing the same are provided. The method of manufacturing the nanogenerator includes forming at least one nanostructure including an organic piezoelectric material on a substrate.02-14-2013
20100109613Switch control circuit with voltage sensing function and camera flash capacitor charger thereof - A switch control circuit has a voltage sensing function. The switch control circuit includes a voltage-clamping buffer, a set driver, a reset driver, and an R-dominant SR latch. The voltage-clamping buffer shifts a switch voltage to generate a down-shifted switch voltage. The set driver generates a set signal according to the down-shifted switch voltage. The reset driver generates a reset signal according to the down-shifted switch voltage. The R-dominant SR latch comprises a set end for receiving the set signal, a reset end for receiving the reset signal, an output end for outputting a switch control signal for controlling conductance of a first transistor coupled to a primary winding of a transformer, and an output bar end for outputting an inverted switch control signal.05-06-2010
20100109614SIGNAL PROCESSOR COMPRISING A REFERENCE VOLTAGE CIRCUIT - A signal processor comprises a reference voltage circuit (RVC) for imposing a reference voltage (VR) onto a capacitance (Cr). The reference voltage circuit (RVC) comprises a negative slope module (NSM) for providing a negative slope signal (SN), which has a magnitude that decreases when a voltage that is present on the capacitance (Cr) increases. A positive slope module (PSM) provides a positive slope signal (SP), which has a magnitude that increases when the voltage that is present on the capacitance (Cr) increases. A minimum selection module (MSM) controls a maximum current (IMX) that the reference voltage circuit (RVC) can apply to the capacitance (Cr) substantially in dependence on the negative slope signal (SN), if the magnitude of the negative slope signal (SN) is smaller than that of the positive slope signal (SP). The minimum selection module (MSM) controls the maximum current substantially in dependence on the positive slope signal (SP), if the magnitude of the positive slope signal (SP) is smaller than that of the negative slope signal (SN).05-06-2010
20130049706CIRCUIT FOR DISCHARGING AN X CAPACITOR - A circuit for discharging an X capacitor includes an AC detection unit, a reset unit, a counter, and a discharging unit. The AC detection unit is coupled to two terminals of the X capacitor through a pin. The AC detection unit has a plurality of reference levels for detecting a DC voltage level according to the plurality of reference levels, and outputting a detection signal. The reset unit is coupled to the AC detection unit for generating a reset signal according to the detection signal. The counter is coupled to the reset unit for being reset according to the reset signal. When the counter does not receive the reset signal within a first predetermined time, the counter generates a turning-on signal. The discharging unit is coupled to the counter for discharging the X capacitor according to the turning-on signal.02-28-2013
20090302806CONTROL CIRCUITRY FOR PROVIDING AN INTERFACE BETWEEN CONNECTABLE TERMINAL AND PERIPHERAL DEVICE CIRCUITRY - Control circuitry for providing an interface between connectable terminal and peripheral device circuitry, wherein the peripheral device circuitry comprises a bus line for transferring data and power between the peripheral device circuitry and the terminal device circuitry; a charge storage device arranged to receive power from the terminal device circuitry over the bus line and to supply the power to the control circuitry; wherein the control circuitry is operable to connect the charge storage device to the bus line to receive power for storage in response to the terminal device circuitry transmitting a first data value represented by a higher voltage level and to disconnect the charge storage device from the bus line in response to the terminal device circuitry transmitting a second data value represented by a lower voltage level, to prevent the charge storage device from discharging over the bus. 12-10-2009
20130069602SQUIB CONTROL CIRCUIT - An improved control circuit that is structured to energize another device such as a squib. A first portion of the circuit includes a first transistor and is structured to discharge at a first rate a first portion of a charge stored by a capacitor. Another portion of the circuit includes a second transistor and is structured to discharge a second portion of the charge subsequent to the discharge of the first portion of the charge and at a second rate greater than the first rate.03-21-2013
20090091301LOAD LOWERING REGENERATIVE ENERGY SYSTEM WITH CAPACITOR CHARGE AND DISCHARGE CIRCUIT AND METHOD OF OPERATING THE SAME - An operating system for an electric motor associated with a hydraulic pump for moving a load and method of operating the same. The operating system includes a power source that is electrically connected to the electric motor wherein a capacitor charge and discharge circuit is used in association with a capacitor in order to store energy within the capacitor as the operating system is in use.04-09-2009
20120223683ADDRESS-SELECTABLE CHARGING OF CAPACITIVE DEVICES - A drive circuit for a capacitive device that comprises a first operational state and a second operational state. The drive circuit comprises a capacitor and preferably two or more transistors. The capacitive device is caused to transition from a first operational state to a second operational state by a row pulse being asserted on a row line and a column pulse asserted on a column enable signal commensurate with the assertion of the row pulse. If the column pulse is deasserted before the row pulse is deasserted, the capacitive device is caused to transition from the first operational state to the second operational upon deassertion of the row pulse. In some embodiments, a precisely controlled variable voltage can be applied to the capacitive device.09-06-2012
20110012568CONTROL UNIT AND METHOD FOR ACTIVATING PERSONAL PROTECTION DEVICES - A control unit and a method for triggering personal protection devices are proposed, which charge an energy reservoir for the control unit via a charging circuit. The charging circuit sets a charging rate for charging as a function of a signal generated outside the charging surface.01-20-2011
20110012567CIRCUIT ARRANGEMENT AND METHOD FOR DETECTING A CHARGE - A circuit arrangement that has an energy source that can provide a charging voltage for charging an electrical energy storage unit in a charging circuit when it is connected to an energy supply, wherein it is possible to represent the charging voltage using an alternating quantity, and that has a capacitor circuit having a first capacitor element, a first valve element, and the energy source, wherein the first capacitor element is charged by the energy source via the first valve element if the charging voltage is negative, so that, if the charging voltage is positive, the voltage over the first capacitor element has the same orientation in the capacitor circuit, in terms of sign, as the charging voltage, and the voltage over the capacitor element.01-20-2011
20110012566CHARGING DEVICE, IMAGE FORMING APPARATUS, AND COMPUTER PROGRAM PRODUCT - An charging device includes: capacitors connected in series; a charging unit that charges the capacitors; bypass units, each respectively connects in parallel to each capacitors, wherein each bypass unit causes, when a charged voltage of any capacitor has reached a set voltage, a charging current to bypass the capacitor whose charged voltage has reached the set voltage; and a control unit that controls the charging unit to charge the capacitors in such a manner that, when a charging voltage of the any capacitor has reached the set voltage, the control unit causes the charging unit to reduce the charging current, and if a predetermined period has elapsed since the charging voltage has reached the set voltage, and if a charging voltage of any of the other capacitors has not reached the set voltage after the predetermined period, the control unit causes the charging unit to increase the charging current.01-20-2011
20090009145CHARGING APPARATUS - A charging apparatus suppresses rise in temperature of an internal chip of a charging element. The output signal obtained from a current detecting portion for detecting charging current to a capacitor and from a voltage detecting portion for detecting a difference between a voltage (VC) of capacitor and a voltage corresponding to DC power supply is integrated by integrator. The charging is carried out by controlling power of a charging element to a predetermined value using an output signal of the integrator and at a time near the completion of the charging, the charging element is controlled by constant-voltage-control-circuit so as to charge the capacitor up to a predetermined voltage. Consequently, the maximum temperature inside the charging element is reduced, thereby providing a charging apparatus with high reliability.01-08-2009
20090009144Discharge Device - A discharging device capable of realizing a proper PWM drive by accurately reflecting, as a strobe device, the secondary-side condition of a separately-excited strobe charging circuit being charged. A charging device which charges a main capacitor (01-08-2009
20130162223Method and Control Device for Charging an Intermediate Circuit Capacitor for a Welding Device - A method for charging an intermediate-circuit capacitor for a welding device, includes feeding a voltage from a first chopping section of a first half-cycle of an AC voltage into the intermediate circuit capacitor, the first chopping section beginning at a first phase-related starting time; and feeding a voltage from a second chopping section of a second half-cycle of the AC voltage following the first half-cycle into the intermediate circuit capacitor, the second chopping section beginning at a second phase-related starting time, which is earlier than the first phase-related starting time.06-27-2013
20100277133POWER SUPPLYING SYSTEM AND METHOD THEREOF - A power supplying system and a method thereof are provided. The power supplying system includes a pulse generator module, a current conducting switch module, a current source, and a capacitor. According to the power supplying system of the present invention, it is not needed to enlarge the capacitor area of the capacitor, and the current source can be properly controlled for avoiding current leakage. Further, the power supplying system is adapted to control a pulse generator module to output a signal having a small pulse width so as to control a current conducting switch module, for further controlling a charging time required for achieving a desired output voltage value. Furthermore, the power supplying system and the method thereof are adapted for saving the IC processing cost and improving the circuit reliability.11-04-2010
20120280664CAPACITIVE POWER SUPPLY FOR HANDHELD DEVICE - A handheld device includes an electronic instrument and a capacitive power supply for storing and delivering power to the electronic instrument. The capacitive power supply includes at least one capacitor, and an electronic circuit operable to boost a voltage from the capacitor to a higher voltage for use by the electronic instrument. The capacitive power supply can be rapidly recharged.11-08-2012
20110260695RELIABLE EXTENDED USE OF A CAPACITOR FOR BACKUP POWER - A capacitor device and associated method having a housing made of a material that is folded to form a cavity sized to contain an electrolyte and electrode package. The material has a substrate and a film attached to the substrate. Respective portions of the film that are folded against each other are fused together to form a first seal that in cooperation with a folded edge of the material seals the cavity. The capacitor also has a second seal attached to the housing and to the first seal that seals the cavity.10-27-2011
20110279096METHOD AND APPARATUS FOR POWERING A HIGH CURRENT SYSTEM FROM A RESISTIVE ELECTRICAL STORAGE DEVICE - An apparatus includes an energy storage device having an equivalent series resistance coupled to a power supply node. The apparatus includes a first capacitor having an equivalent series resistance substantially lower than the equivalent series resistance of the energy storage device. In a first mode of the apparatus, the first capacitor is operative to receive charge from the power supply node. In a second mode of the apparatus, the first capacitor is operative to deliver current to a load. In a third mode of the apparatus, the power supply node is operative to deliver a second current to the load. The second current is substantially less than the first current.11-17-2011
20120286743SYSTEM AND METHOD FOR GENERATING A NEGATIVE CAPACITANCE - A method of generating a negative capacitance in a capacitor device is provided. The method comprises providing the capacitor device. The capacitor device comprises an active layer of vanadium dioxide (VO11-15-2012
20090289607ULTRA-CAPACITOR BASED UNINTERRUPTIBLE POWER SUPPLY - A backup power supply includes at least one ultra capacitor to store energy. The backup power supply includes a multiphase boost converter to provide a relatively constant voltage level from the energy stored on the at least one ultra capacitor. A charging and discharging controller is used to monitor the status of a power supply and control the charging and discharging of the ultra capacitors.11-26-2009
20090315521DEVICE PROVIDED WITH POWER SUPPLY CIRCUIT - A device configured to suppress the occurrence of an inrush current is provided at a low cost, where the device includes a power circuit configured to generate a voltage used to drive a load, a capacitor connected to a supply line provided to supply power from the power circuit to the load, the capacitor being configured in such manner to stabilize the potential of the load, a charging/discharging circuit that supplies an amount of power smaller than a predetermined amount of power to the capacitor and that discharges the smaller amount of power from the capacitor, a charging circuit that supplies an amount of power larger than the predetermined amount of power to the capacitor, and a switch circuit configured to make each of the charging/discharging circuit and the charging circuit operate.12-24-2009
20080290841Charging Circuit for Bootstrap Capacitor and Integrated Driver Circuit Using Same - The present invention discloses a charging circuit for charging a bootstrap capacitor from a supply voltage, the charging circuit comprising: a depletion mode transistor, having a first end of its source/drain electrically connected with the supply voltage, a gate electrically connected to the supply voltage, and a second end of its source/drain electrically connected with the bootstrap capacitor. Preferably, a diode is provided between the supply voltage and the depletion mode transistor.11-27-2008
20120086408POWER DISTRIBUTOR AND SEMICONDUCTOR DEVICE HAVING THE SAME - A power distributor includes a large reservoir capacitor, a switch coupled between at least one power supply line and the large reservoir capacitor, and a controller configured to turn on or off the switch based on whether a circuit block connected to the power supply line is in operation or not.04-12-2012
20090256531CHARGE INJECTION DISCHARGE CIRCUIT - Disclosed is a method and circuit for dissipating injected parasitic charge including a circuit stage, a pulse generating circuit and a switch. The circuit stage having an input node and an output node that injects a parasitic charge when switched OFF to the output node. The pulse generating circuit can generate a pulsed signal having an input for receiving a control signal. The control signal indicates the circuit stage is switching OFF, and has an output for outputting a pulsed signal in response to the control signal at the input. The pulsed signal can have a predetermined duration. The switch can be configured to be actuated by the pulsed signal output by the pulse generating circuit, and having a terminal connected to the output node of the circuit stage and a terminal connected to circuit to substantially dissipate the injected parasitic charge.10-15-2009
20120032649Power Supply for a Load Control Device - A power supply for a load control device generates a DC voltage and provides an asymmetrical output current, while drawing a substantially symmetrical input current. The power supply comprises a controllably conductive switching circuit for controllably charging an energy storage capacitor across which the DC voltage is produced. The energy storage capacitor begins charging at the beginning of a half-cycle and stops charging after a charging time in response to the magnitude of the DC voltage and the amount of time that the energy storage capacitor has been charging during the present half-cycle. The charging time is maintained substantially constant from one half-cycle to the next. The power supply is particularly beneficial for preventing asymmetrical current from flowing in a multiple location load control system having a master load control device supplying power to a plurality of remote load control devices all located on either the line-side or the load-side of the system.02-09-2012
20120105017METHOD OF MAINTAINING WET-TANTALUM ELECTROLYTIC CAPACITORS - Wet-tantalum capacitors used in a medical device are charged to and maintained at a maintenance voltage between full energy charges so that deformation in the wet-tantalum capacitor is substantially inhibited.05-03-2012
20110215771VARIABLE ON-TIME CONTROL METHOD FOR HIGH LIGHT-LOAD EFFICIENCY, SMALL OUTPUT VOLTAGE RIPPLE, AND AUDIBLE-NOISE-FREE OPERATION - An apparatus and method of controlling power converters is achieved that produces high light-load efficiency and reduced output voltage ripple while maintaining quiet operation that is free from audible noise. The inventive method includes a variable on-time control circuit that is applicable to a wide variety of switching mode converters, including, but not limited to, boost converters, buck converters, buck-boost converters, single-ended primary inductor (SEPIC) converters, and other converter topologies, both isolated and non-isolated.09-08-2011
20090243557Phase Synchronization Circuit - A phase synchronization circuit comprising: a charging/discharging-circuit to charge/discharge a capacitor in accordance with a drive-signal, charging and/or discharging current-values of the capacitor being settable; an oscillation-circuit to output an oscillation-signal having a frequency corresponding to a charging-voltage; a drive-circuit to output as the drive-signal a first drive-signal for matching charging and discharging periods when a phase-difference and the oscillation-signal is smaller than a predetermined phase-difference and reducing the phase-difference when the phase-difference is greater than the predetermined phase-difference; and a setting-circuit to receive setting-data for setting the charging and/or discharging current-values, hold the setting-data, and set the charging and/or discharging current-values, based on the setting-data, the drive-circuit outputting as the drive-signal a second drive-signal for matching charging and discharging periods, when receiving an adjustment-instruction-signal, the setting-circuit holding the setting-data for rendering at a constant level the charging-voltage of the capacitor charged/discharged in accordance with the second drive-signal.10-01-2009
20090309554Circuit for a power supply unit for generating a DC voltage - A circuit is disclosed for a power supply unit for generating a DC voltage, the power supply unit having a current transformer, a rectifier, a series circuit including a first blocking diode and a charging capacitor, an electronic switch which is in parallel with the current transformer, a comparator, a voltage reference circuit for the comparator. In at least one embodiment, the circuit includes a circuit for monitoring the voltage across the charging capacitor. The comparator is used to control the electronic switch on the basis of the voltage across the charging capacitor in relation to the voltage which is generated by the voltage reference circuit and is applied to the comparator. In at least one embodiment, provision is made of a tap which is located between the rectifier and the first blocking diode and at which the circuit for monitoring the voltage across the charging capacitor is located. The circuit is in the form of an RC combination having a second blocking diode connected in series.12-17-2009
20110062919DISCHARGE CIRCUIT - A discharge circuit includes an OC (Optical Coupler), a capacitor, an NPN-type transistor, and a discharge unit. The discharge circuit is parallel connected to a PFC (power factor corrector) circuit which includes a filter capacitor. The discharge unit has a MOSFET and a discharge resistor. A drain of the MOSFET is connected to a first terminal of the PFC circuit via the discharge resistor, a gate thereof is connected the anode of the capacitor, and a source thereof is connected to ground.03-17-2011
20100090663ENERGY STORAGE MODULE - An energy storage module for providing backup power to electronic systems includes one or more capacitor banks, each including one or more capacitors for storing energy. The energy storage module also includes a first voltage regulator that may, during a normal mode of operation, provide a regulated direct current (DC) voltage to charge the one or more capacitors of each capacitor bank. In addition, each of the capacitor banks may include a voltage leveling circuit that may maintain a specific voltage on the capacitors. Further, the energy storage module includes an output circuit that may, during a backup mode of operation, provide an output voltage derived from an output of each of the one or more capacitor banks. The output circuit includes a control unit configured to regulate and combine the output of each of the one or more capacitor banks.04-15-2010
20090243558ELECTRONIC BALLAST WITH HOLD-UP ENERGY STORAGE - An electronic ballast is provided, which includes an energy hold-up circuit that maintains operation of an AC discharge load, such as a gas discharge lamp, during at least a portion of a utility source outage.10-01-2009
20090200991POWER SUPPLY SYSTEM - A limit value of an output current of power converter is defined as a first current value when a voltage at both ends of capacitor is higher than a voltage at both ends of battery, and a limit value of the output current thereof is defined as a second current value when the voltages are substantially equal to each other, the first current value is set to be smaller than the second current value. Thus, when a voltage at both ends of capacitor and a voltage at both ends of battery are substantially equal, heat is hardly generated. The limit value of the output current is set to a maximum current consumed by load. When a voltage at both ends of capacitor is higher than a voltage at both ends of battery, the limit value of the output current is set to be smaller than the second current value, and thereby heat generation is suppressed. Thus, the size of the heat dissipating components can be reduced, and a power supply system whose entire size can be minimized can be provided.08-13-2009
20090273321DEVICE AND METHOD FOR CHARGING AN ENERGY STORE - The energy required for equilibrating the charges of at least two cells in series in an energy storage device is introduced by way of a first charge path via an alternating voltage bus to the cell with the lowest cell voltage (U11-05-2009
20090289606SYSTEM AND METHOD FOR MEMS ARRAY ACTUATION - An actuator and method for MEMS array actuation is disclosed. In one embodiment, the actuator having a pixel coupled to a charge integration circuit, the pixel comprising a voltage bias, a variable gap capacitor, and a switch, all in series, the charge integration circuit configured to modulate charge on the variable gap capacitor during an actuation cycle. In one embodiment, the MEMS actuator having a unit cell with parasitic capacitance and coupled to a negative feedback sampling circuit, the unit cell comprising a variable gap capacitor, a voltage bias, a modulated current source, and a voltage-to-current converter, the negative feedback sampling circuit configured to receive an output current from the unit cell, convert the output current from the unit cell to a low voltage signal, sample the low voltage signal, and provide a feedback signal to the modulated current source to compensate for the parasitic capacitance in the unit cell.11-26-2009
20090102434AUXILIARY POWER SUPPLY DEVICE FOR VEHICLE, POWER SUPPLY DEVICE FOR VEHICLE, HAVING THE AUXILIARY POWER SUPPLY DEVICE, AND AUTOMOBILE - An auxiliary power supply device for vehicle includes a capacitor unit, a temperature detector, and a charge controller. The capacitor unit includes at least one electric double layer capacitor. The temperature detector detects temperature in vicinity of the capacitor unit. The charge controller controls charging voltage of the capacitor unit based on a detection result of the temperature detector.04-23-2009
20090261788DISCHARGE APPARATUS, METHOD OF CONTROLLING DISCHARGE APPARATUS, AND IMAGING APPARATUS - A discharge apparatus includes a discharge device having a temperature characteristic in which the impedance of the discharge device in a discharging state decreases as the ambient temperature increases, a capacitor that stores charge for causing the discharge device to discharge, a discharge control device that controls electrical connection and disconnection between the capacitor and the discharge device, and a current limiting device that limits a current flowing in the discharge control device to a predetermined value or less when the discharge control device electrically connects the capacitor to the discharge device. The current limiting device is serially connected to the discharge device, the capacitor, and the discharge control device. The current limiting device is a thermistor having a temperature characteristic in which the resistance of the thermistor increases as the temperature of the thermistor increases.10-22-2009
20090261787HYBRID BATTERY - A hybrid battery includes a converter, a controller, a power source, and an ultracapacitor configured to be discharged. The converter is operable to receive a control signal and to regulate a current level that is allowed to be drawn from the power source to charge the ultracapacitor in accordance with the control signal. The controller is operable to generate and provide the control signal to the converter. The controller is operable to generate the control signal based at least in part on a measure of the voltage level of the ultracapacitor and a measure current being drawn to charge the ultracapacitor.10-22-2009
20120293137POWER STORAGE APPARATUS - A power storage apparatus provided with a capacitor module and a power storage control circuit is connected between a generator and an electrical load. The capacitor module includes a plurality of capacitors and a plurality of switching devices which are connected in series with the capacitors, respectively, the capacitors and the switching devices together constituting a plurality of series circuits which are connected parallel to each other. When starting up the generator, the power storage control circuit controls only the specified switching device to become ON in order to quickly charge the capacitor which is connected in series with the switching device so that a voltage of the capacitor module is increased and a power source for starting up the generator is produced as high speed.11-22-2012
20120293138POWER CONTROL UNIT AND CONTROL METHOD FOR POWER CONTROL UNIT - A power control unit is provided with a converter; a filter capacitor that is connected onto one side of converter; a smoothing capacitor that is connected onto the other side of converter; an MG-ECU that is operated to control converter with power supplied from filter capacitor; and a casing that houses these constituent elements therein. In order to electrically discharge filter capacitor and smoothing capacitor, an MG-ECU controls converter in such a manner as to alternately repeat ON/OFF of an npn-type transistor for a lower arm of an IPM and ON/OFF of an npn-type transistor for an upper arm of IPM, and further, to set a time of ON of npn-type transistor for the upper arm longer than that of ON of npn-type transistor for the lower arm.11-22-2012
20100102782METHOD FOR DISCHARGING CAPACITIVE LOADS - Methods for storing electrical energy discharged from a capacitive source, embodiments including developing a capacitive load in the source and closing a switch between the capacitive source and a voltage conversion block after an output voltage of the source both exceeds a threshold value and is detected to peak. The conversion block includes an inductor and the storage device connected in series and further may include a diode connected in parallel across the inductor and the storage device. Apparatus for storing electrical energy discharged from a capacitive source include embodiments having a capacitive source configured to produce an output voltage, a switch connected to the source, an inductor connected to the switch, a storage device connected to the inductor and a controller configured to close the switch after an output voltage of the source both exceeds a threshold value and is detected to peak.04-29-2010
20090051330Charging Device - There is provided a charging device capable of improving charging efficiency and reducing power consumption, thereby increasing a battery service life. The charging device charges a main capacitor (02-26-2009
20080272743Driver Circuit Arrangement - The invention relates to a driver circuit arrangement (11-06-2008
20110204855CIRCUIT TOPOLOGY FOR REGULATING POWER FROM LOW CAPACITY BATTERY CELLS - A power circuit includes a voltage limited charge circuit and a linear regulator to supply high current pulses to a load while maintaining a regulated output and not discharging the battery below a predetermined level. The voltage limited charge circuit includes a low impedance transistor and an operational amplifier that are together configured as an active loop. The transistor functions as a switch, and the operational amplifier provides an adjustable control voltage that adjusts the impedance of the transistor according to current battery voltage and a minimum threshold voltage. Adjusting the impedance of the transistor enables the storage capacitor to charge very fast when the battery impedance is low, or very slow when the battery impedance is high.08-25-2011
20100270982Smart Electronic Switch for Low-Power Loads - A two-wire smart load control device, such as an electronic switch, for controlling the power delivered from a power source to an electrical load comprises a relay for conducting a load current through the load and an in-line power supply coupled in series with the relay for generating a supply voltage across a capacitor when the relay is conductive. The power supply controls when the capacitor charges asynchronously with respect to the frequency of the source. The capacitor conducts the load current for at least a portion of a line cycle of the source when the relay is conductive. The load control device also comprises a bidirectional semiconductor switch, which is controlled to minimize the inrush current conducted through the relay. The bidirectional semiconductor switch is rendered conductive in response to an over-current condition in the capacitor of the power supply, and the relay is rendered non-conductive in response to an over-temperature condition in the power supply.10-28-2010
20090085529POWER SOURCE - An electronics system module is provided. The electronics system module includes an electronics device and a power source. The power source includes a capacitor coupling to the electronics device and providing power thereto and an adjustable resistance connected in series between the capacitor and the electronics device. The resistance is adjusted by a control mechanism, so that the voltage supplied to the electronics device from the capacitor is constant.04-02-2009
20120105018METHOD AND APPARATUS FOR IMPLEMENTING A POWER CONVERTER INPUT TERMINAL VOLTAGE DISCHARGE CIRCUIT - A switch is coupled to a control circuit and to an input of a power converter. The control circuit is coupled to drive the switch in a first operating mode to transfer energy from the input to an output of the power converter when an electrical energy source is coupled to the input of the power converter. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input. A capacitance is coupled between input terminals of the input of the power converter and is discharged to a threshold voltage in less than a maximum period of time from when the electrical energy source is uncoupled from the input terminals. The control circuit is coupled to drive the switch to have a high average impedance in the first operating mode.05-03-2012
20120105016APPARATUS AND METHOD FOR DISCHARGING CAPACITOR OF INPUT FILTER OF POWER SUPPLY, AND POWER SUPPLY INCLUDING THE APPARATUS - A power supply includes an input filter and a discharging device. The input filter includes a capacitor to which an AC power source is provided. The discharging device rectifies and samples the AC power source. The discharging device generates a reference voltage according to a peak voltage of a generated sampling signal, generates an AC power source cutoff detection signal according to a comparison signal generated by comparing the sampling signal and a reference voltage, and discharges the capacitor through a discharging register according to the AC power source cutoff detection signal.05-03-2012
20090160409Power Supply for a Load Control Device - A power supply for a load control device generates a DC voltage and provides an asymmetrical output current, while drawing a substantially symmetrical input current. The power supply comprises a controllably conductive switching circuit for controllably charging an energy storage capacitor across which the DC voltage is produced. The energy storage capacitor begins charging at the beginning of a half-cycle and stops charging after a charging time in response to the magnitude of the DC voltage and the amount of time that the energy storage capacitor has been charging during the present half-cycle. The charging time is maintained substantially constant from one half-cycle to the next. The power supply is particularly beneficial for preventing asymmetrical current from flowing in a multiple location load control system having a master load control device supplying power to a plurality of remote load control devices all located on either the line-side or the load-side of the system.06-25-2009
20120139504APPARATUS FOR OBTAINING INFORMATION ENABLING THE DETERMINATION OF THE MAXIMUM POWER POINT OF A POWER SOURCE - An apparatus for determining information enabling determination of a maximum power point of a power source providing at a first time period a direct current, the apparatus including at least a capacitor, a mechanism for charging the capacitor during a second time period and for discharging the capacitor in a third time period, and a mechanism for monitoring voltage and current variations on the capacitor. During the first time period, the direct current does not go through the mechanism for charging the capacitor.06-07-2012
20090184690CHARGER - A charger includes: a rectifier to rectify a received radio wave to generate a charging current; a potential generator to generate a bias voltage setting an operating point of the rectifier; and a controller to supply the bias voltage generated by the potential generator when an output voltage of the rectifier is equal to or larger than a predetermined value.07-23-2009
20090140701Auto-Averaging RC Time Constant Calibration - This disclosure relates to auto-averaging RC time constant calibration are described. An auto-averaging calibration circuit includes two capacitor branches, where capacitors in the capacitor branches, charge and discharge alternately to accommodate multiple charging cycles in one measurement cycle for measuring a RC time constant. A value of RC time constant is obtained in each charging cycle. A final value of the RC time constant can be determined by averaging various values of the time constants obtained during each charging cycle.06-04-2009
20100148732CIRCUIT TO SPREAD THE SPECTRUM OF A PWM SIGNAL - An apparatus is provided. The apparatus comprises a first current source and a second current source that charge and discharge a capacitor. Coupled between the capacitor and the second current source is a switch that can be actuated and deactuated by a controller. Preferably, the controller is coupled to the capacitor and receives a first threshold voltage and a second threshold voltage so that it can actuate the switch if the voltage across the capacitor is greater than the first threshold voltage and deactuate the switch if the voltage across the capacitor is less than the second threshold voltage. Additionally, there is a comparator that is coupled to the capacitor that compares the voltage across the capacitor to a reference voltage, and there is a a multiplexer that is coupled to the capacitor and that is coupled to the comparator. The multiplexer outputs the voltage across the capacitor if the voltage across the capacitor is greater than the reference voltage and outputs the reference voltage if the voltage across the capacitor is less than the reference voltage.06-17-2010
20110221398Impedence Balancer - An impedance balancer for power cell balancing using changes in impedance is provided. The apparatus may include a rail capacitor that is switchably connected to a first capacitor and switchably connected to a second capacitor. The first capacitor may also be switchably connected to a first power cell and the second capacitor may also switchably connected to a second power cell. Via controllable switches, the first and second capacitors may shuttle energy between the power cells through the rail capacitor. Additional and related methods and apparatuses are also provided.09-15-2011
20090051331Method and Circuit for Controlling the Refresh Rate of Sampled Reference Voltages - The present invention relates to controlling the refresh rate of the reference voltage on a sampling capacitor (C02-26-2009
20090085530POWER GENERATOR AND ELECTRONIC APPARATUS - A power generator capable of improving power generation efficiency is obtained. This power generator includes a movable portion moving by kinetic energy acting on a power generator body, a first conversion portion converting kinetic energy of the movable portion to electric energy and a movement direction changing portion changing a direction in which the movable portion moves to a direction along a direction in which acceleration applied to the movable portion is larger regardless of a direction of the power generator body.04-02-2009
20090096430CHARGING AND RECHARGABLE DEVICES - A capacitor-based (supercapacitor, ultracapictor or psudeocapcitor) electrical charger, rechargeable device and energy storage pack for use with a rechargeable power tool. The rechargeable device includes a storage capacitor. The electrical charger includes a supply capacitor electrically connected to an electrical contact, the supply capacitor being charged when the electrical charger is connected to a power source. While in use, any charge in the supply capacitor is rapidly distributed between the supply capacitor and the storage capacitor when the rechargeable device is mounted in the receiver of the electrical charger. The electrical charger includes a safety interlock switch which only supplies power to the electrical contact of the charger after electrical terminal of the rechargeable device have engaged the electrical contact.04-16-2009
20090102435CONTROL CIRCUIT AND METHOD FOR CAPACITOR CHARGING CIRCUIT - An output voltage monitoring circuit monitors an output voltage of a capacitor charging circuit. A first sample-and-hold circuit samples and holds a voltage of a connection point of a primary coil of a transformer and a switching transistor. A first monitoring comparator compares output of the first sample-and-hold circuit with a predetermined first reference voltage. When the output of the first sample-and-hold circuit exceeds the first reference voltage, a signal processor executes predetermined signal processing. The first sample-and-hold circuit starts a sampling period after a predetermined first time has elapsed after the switching transistor is turned OFF. When a voltage drop across a detection resistor reaches a third reference voltage, the first sample-and-hold circuit ends the sampling period.04-23-2009
20130214745DISCHARGE CIRCUIT FOR SMOOTHING CAPACITOR OF DC POWER SUPPLY - A discharge circuit for a DC power supply smoothing capacitor that is used in a power conversion device that supplies DC power via a switch to the DC power supply smoothing capacitor and an inverter, includes; a resistor that discharges charge in the capacitor; a switch connected in series with the resistor, that either passes or intercepts discharge current flowing from the capacitor to the resistor; a measurement circuit that measures a terminal voltage of the capacitor; and a control circuit that controls continuity and discontinuity of the switch; wherein the control circuit, after having made the switch continuous and starting discharge of the capacitor by the resistor, if a terminal voltage of the capacitor as measured by the measurement circuit exceeds a voltage decrease characteristic set in advance, makes the switch discontinuous and stops discharge by the resistor.08-22-2013
20090108815Energy Capture Circuit - An energy capture circuit for capturing energy in response to an input pulse. The circuit is constructed and arranged to transfer input energy in time divided portions among subcircuits. This includes a storage means, a clock means, at least two subcircuits, and at least one transfer circuit. Each subcircuit includes a first inductive means in operative communication with the input source, a rectifying means for producing a positive current in operative communication with the first inductive means, a capacitive means in operative communication with the rectifying means, and a switch means in operative communication with the capacitive means. At least one transfer circuit is in operative communication with each of the switch means of the at least two subcircuits. The output of the clock means is in operative communication with both a first switch means and an inverter means, the inverter means having an output in operative communication with a second switch means.04-30-2009
20090001939APPARATUS FOR PREVENTING CAPACITOR CHARGER FROM OVERCHARGING AND METHOD THEREOF - An apparatus for controlling a charging circuit is provided. The apparatus includes a first detector, a second detector, and a controller. The first detector detects a voltage level at a first time and generates a first indication value corresponding to the voltage level at the first time, where the voltage level corresponds to an output voltage of the charging circuit. The second detector detects the voltage level at a second time after the first time and generates a second indication value corresponding to the voltage level at the second time. The controller receives the first and second indication values, and generates a control signal according to the first and second indication values for turning the charging circuit on and off.01-01-2009
20100156358OSCILLATOR CIRCUIT - An oscillator circuit including a charge/discharge unit, a capacitance amplifier, and a level detection circuit is provided. The charge/discharge unit is used to receive a control signal, and perform a charge or discharge operation on a charge/discharge terminal according to the control signal. The capacitance amplifier, including a first impedance, a second impedance, a voltage follower, and a capacitor, is capable of providing an equivalent capacitance with amplifying characteristics. An input terminal of the level detection circuit is electrically connected to the charge/discharge terminal of the charge/discharge unit, and the level detection circuit generates the control signal to the charge/discharge unit according to the charge/discharge terminal of the charge/discharge unit. The oscillator circuit of the present invention may use a capacitance with a smaller level to provide an equivalent capacitance with amplifying characteristics, and thus achieve an oscillator function.06-24-2010
20090140702System and Method for Precharging and Discharging a High Power Ultracapacitor Pack - This invention is a system and a method that uses the braking resistor, commonly used and available in electrically or hybrid-electrically propelled vehicles, to limit the precharge current during the startup of a high power ultracapacitor pack energy storage device and/or safely and rapidly discharge an ultracapacitor pack for maintenance work or storage to lengthen the life of the individual ultracapacitor cells and, correspondingly, the whole pack. The use of the braking resistor for precharging an ultracapacitor energy storage pack is an effective and less expensive method compared to other methods such as a separate DC-to-DC converter. This method includes the control logic sequence to activate and deactivate switching devices that perform the connections for the charging and discharging current paths.06-04-2009
20110057628POWER STORAGE DEVICE - In the field of portable electronic devices in the future, portable electronic devices will be desired, which are smaller and more lightweight and can be used for a long time period by one-time charging, as apparent from provision of one-segment partial reception service “1-seg” of terrestrial digital broadcasting that covers the mobile objects such as a cellular phone. Therefore, the need for a power storage device is increased, which is small and lightweight and capable of being charged without receiving power from commercial power. The power storage device includes an antenna for receiving an electromagnetic wave, a capacitor for storing power, and a circuit for controlling store and supply of the power. When the antenna, the capacitor, and the control circuit are integrally formed and thinned, a structural body formed of ceramics or the like is partially used. A circuit for storing power of an electromagnetic wave received at the antenna in a capacitor and a control circuit for arbitrarily discharging the stored power are provided, whereby lifetime of the power storage device can be extended.03-10-2011
20110057627Discharge circuit for high-voltage networks - A device for discharging an electric network or a capacitive component includes a switchable resistor. The discharge circuit has a particularly low power loss and operates reliably when the switchable resistor includes a PTC resistor and a switch whose control terminal is powered by the network voltage.03-10-2011
20110057626POWER SUPPLY AND CHARGING CIRCUIT FOR HIGH ENERGY CAPACITORS - A switched mode power supply is disclosed for charging a load such as a high energy capacitor. The power supply is adapted to operate in a substantially constant power mode and includes a flyback converter having a primary circuit including a controller and a secondary circuit for providing an output to the load. The power supply is arranged such that it utilizes substantially no current limiting in the secondary circuit. The load includes a plurality of high energy capacitors and a plurality of terminals. The terminals are connected to the capacitors such that the capacitors may be arranged in a first configuration for charging the load and may be arranged in a second configuration for discharging the load.03-10-2011
20110031939Discharge Circuit for Smoothing Capacitor of DC Power Supply - A discharge circuit for a DC power supply smoothing capacitor that is used in a power conversion device that supplies DC power via a switch to the DC power supply smoothing capacitor and an inverter, includes; a resistor that discharges charge in the capacitor; a switch connected in series with the resistor, that either passes or intercepts discharge current flowing from the capacitor to the resistor; a measurement circuit that measures a terminal voltage of the capacitor; and a control circuit that controls continuity and discontinuity of the switch; wherein the control circuit, after having made the switch continuous and starting discharge of the capacitor by the resistor, if a terminal voltage of the capacitor as measured by the measurement circuit exceeds a voltage decrease characteristic set in advance, makes the switch discontinuous and stops discharge by the resistor.02-10-2011
20130154579CAPACITOR DEVICE - A capacitor device includes a capacitor unit, a voltage-dividing circuit for outputting a divided voltage obtained by dividing a voltage of the capacitor unit, and a comparator circuit. The comparator circuit causes the charge circuit to operate such that the voltage of the capacitor unit reaches a full-charge voltage. The voltage-dividing circuit includes a semiconductor switching element, and outputs a divided voltage. A control circuit is operable to determine the full-charge voltage to be a high-temperature full-charge voltage by turning off the first semiconductor switching element when a temperature at the capacitor unit exceeds a reference temperature. The control circuit is operable to determine the full-charge voltage to be a low-temperature full-charge voltage that is higher than the high-temperature full-charge voltage by turning on the first semiconductor switching element when the detected temperature is not higher than the reference temperature.06-20-2013
20090033294VEHICLE SOURCE DEVICE - A vehicle source device capable of performing a more accurate temperature-rise corresponding to the ability of the capacitor is provided. The correlation of the temperature and the internal resistance corresponding to the ability of the current capacitor in time of activation is obtained in advance, the internal resistance is obtained for every repetition of charge/discharge, and the temperature of the inside of the capacitor is obtained from the correlation. Since the accurate temperature of the inside of the capacitor is obtained, the capacitor is accurately temperature-raised to the target temperature.02-05-2009
20100164441Dense Energy Storage via Interacting Nanostructures - Apparatus and method for dense energy storage is disclosed. The inner tube of a multi-wall nanotube is reversibly withdrawn from the outer tube thereof via a facing electrode that is biased with respect to the nanotube by an external voltage source. As the inner tube is withdrawn, the potential energy of the van der Waals field between the inner tube and the outer tube increases, which manifests as a force that is directed opposite to the electrostatic force of attraction between the electrode and the inner tube. The storage apparatus is discharged by decreasing the applied voltage, which enables the van der Waals force to overcome the electrostatic force. As a consequence, the inner tube is drawn back into the outer tube. The electrode and nanotube define a variable capacitor and, as such, the change in capacitance based on movement of the inner tube results in a flow of charge to a load.07-01-2010
20110241629SINGLE STAGE HYBRID CHARGE PUMP - An apparatus, system, and method are disclosed for a single stage hybrid charge pump. A switch module is connected to ground. An inductance module is connected between a DC voltage source and the switch module. A first capacitance module is connected to the switch and to the inductance module. A first current blocking module is connected between the DC voltage source the first capacitance module. A second capacitance module is connected to ground. A second current blocking module is connected to a node between the first capacitance module and the first current blocking module and is also connected to the second current blocking module. The switch module is operated to switch between an open state and a closed state thereby causing a voltage across the second current blocking module to increase until it is limited by a voltage limiting module.10-06-2011
20100060244CHARGE CONTROLLING SEMICONDUCTOR INTEGRATED CIRCUIT - Disclosed is a charge controlling semiconductor integrated circuit including: an electric current controlling transistor connected between a voltage input terminal and an output terminal to control an electric current which flows from the voltage input terminal to the output terminal; a power source monitoring circuit to detect status of input voltage of the voltage input terminal; and a transistor element connected between the voltage input terminal and a ground potential point, wherein a bypass capacitor is connected to the voltage input terminal; and the transistor element is turned on and the bypass capacitor discharges when the power source monitoring circuit detects the input voltage of the voltage input terminal is cut off.03-11-2010
20100066313Methods for Manufacturing and Operating a Semiconductor Device - A method for manufacturing and operating a semiconductor device is disclosed. The semiconductor device includes a first capacitor node, a second capacitor node, a first capacitor electrode, a second capacitor electrode, a first switch and a second switch. The first switch is coupled between the first capacitor electrode and the first and second capacitor nodes such that the first switch has a first position that couples the first capacitor electrode to the first capacitor node and a second position that couples the first capacitor electrode to the second capacitor node. The second switch is coupled between the second capacitor electrode and the first and second capacitor nodes such that the second switch has a first position that couples the second capacitor electrode to the first capacitor node and a second position that couples the second capacitor electrode to the second capacitor node.03-18-2010
20110084669POWER SUPPLY DEVICE AND SYSTEM - A power supply device and system have an electrically polarized element in which a remnant electrical polarization is formed and retained. Electrodes are formed on the electrically polarized elements and the remnant electrical polarization generates an electrical potential on the electrodes. Electrical circuits are coupled to the electrically polarized element to control the external electric charges attracted and distributed on the electrodes, for establishing the electrical potential on the electrodes. The electrodes can output electric currents by controlling the external electric charges distribution. The electrically polarized element may be made of ferroelectric material, including a ferroelectric bulk ceramic, ferroelectric multilayer ceramic, ferroelectric single crystal, ferroelectric thin film, ferroelectric thick film and ferroelectric polymer, and all the other materials with electric polarization retained therein. Power supply devices and systems made according to the present invention have very long standby time, small in size and efficient for many applications including RF systems.04-14-2011
20110101926CHARGING DEVICE - A charging device for providing an output voltage to charge a flash capacitor is provided. A transformer includes a primary winding and a secondary winding. The transformer generates a primary voltage according to an input voltage and generates a secondary voltage according to the primary voltage. A diode coupled between the secondary winding of the transformer and the flash capacitor provides the output voltage according to the secondary voltage. A current detector detects a current flowing through the primary winding of the transformer and generates a detection signal. A determining circuit generates a determining signal according to the primary voltage, the secondary voltage and a reference voltage. A control circuit switches a switch coupled between the primary winding of the transformer and a ground according to the detection signal and the determining signal, so as to control the transformer to charge the flash capacitor.05-05-2011
20080290842ENERGY RECAPTURE FOR AN INDUSTRIAL VEHICLE - A system for capturing regenerative energy includes a battery configured to provide power for a traction motor and other operations of a vehicle and a capacitor connected to the battery. An auxiliary motor is configured to operate as a generator during a regenerative energy operation. The system further includes a controller configured to direct the regenerative energy to the capacitor during the regenerative energy operation and discharge the capacitor to provide power to the traction motor or for the other operations of the vehicle.11-27-2008
20080252266Device and Method for Balancing Charge Between the Individual Cells of a Double-layer Capacitor - A device and a method for balancing charge between individual cells of a double-layer capacitor, in particular in a multi-voltage motor vehicle electrical system. Each individual cell of the double-layer capacitor is associated with a capacitor, the first terminal of which can be connected via a first switch to a first terminal of the associated cell and via a second switch to a second terminal of the associated cell, and the second terminal of which is connected to the second terminals of all of the capacitors.10-16-2008
20110163729Resonant transformer systems and methods of use - Resonant transformer systems and methods of use are described. One aspect may include a primary winding, a secondary winding, and at least one output winding. In further aspects, a transformer may be coupled to the secondary winding. In one aspect, the output winding is coupled to rectifying circuitry, which may be coupled to one or more capacitors.07-07-2011
20110025278METHOD AND APPARATUS FOR IMPLEMENTING A POWER CONVERTER INPUT TERMINAL VOLTAGE DISCHARGE CIRCUIT - A circuit to discharge a capacitance between input terminals of a power system is disclosed. An example circuit includes a control circuit coupled to an input of a power system. The control circuit is coupled to detect whether an electrical energy source is coupled to an input of the power system. A switch is also included and is coupled to the control circuit and to the input of the power system. The control circuit is coupled to drive the switch in a first operating mode when the electrical energy source is coupled to the input of the power system. The control circuit is coupled to drive the switch in a second operating mode when the electrical energy source is uncoupled from the input of the power system. A capacitance coupled between input terminals of the input of the power system is discharged through the switch to a threshold voltage in less than a maximum period of time from when the electrical power source is uncoupled from the input terminals of the power system.02-03-2011
20110254514LOW POWER CONVERSION AND MANAGEMENT OF ENERGY HARVESTING APPLICATIONS - A method and apparatus for low voltage conversion and energy storage uses a charge pump array including a first set of capacitors in parallel with a second set of capacitors and switches for selectively coupling the first and second set of capacitors to a variable input DC voltage. A data processor programmably controls one or more of the switches to couple the first and second set of capacitors to the variable input DC voltage for a variable first time period during which the input DC voltage charges the first and second set of capacitors to a DC voltage level. An energy storage device is switchably coupled to an output of the charge pump array. The data processor programmably controls one or more of the switches to couple the charge pump array output to the energy storage device for a variable second time period during which a voltage stored across each of the capacitors during the first time period is combined to produce a higher voltage significantly higher than the input DC voltage, the higher voltage being provided to the energy storage device.10-20-2011
20120146592METHOD FOR DISCHARGING AN INTERMEDIATE CIRCUIT CAPACITOR OF AN INTERMEDIATE VOLTAGE CIRCUIT CONVERTER - A method for discharging an intermediate circuit capacitor of an intermediate voltage circuit converter with an electronic power converter is disclosed, wherein a main switch arranged between an AC power supply network and a primary winding of a transformer is opened and a line contactor connected between a first terminal of a secondary winding of the transformer and a first AC voltage-side connection of the electronic power converter is closed. A second terminal of the secondary winding of the transformer is connected to a second AC voltage-side connection of the electronic power converter. A pre-charging contactor connected in series with a pre-charging resistor is connected in parallel with the line contactor. Two switchable power semiconductors of the electronic power converter, which are located diagonally opposite each other in different branches of the electronic power converter, are switched on.06-14-2012
20100213905EARTH LEAKAGE DETECTION CIRCUIT - A zero-phase current is outputted by detecting a ground-fault current with a zero-phase-sequence current transformer. A circuit having an open collector output operates when the voltage of the zero-phase current exceeds a positive side threshold value or it falls below a negative side threshold value to discharge a capacitor. When the inter-plate voltage of the capacitor falls below a threshold value voltage, a controlling means detects electric leakage to transmit that to a control unit of an air conditioner.08-26-2010
20100213904VEHICLE AND DISCHARGE METHOD OF SMOOTHING CAPACITOR IN VEHICLE - At the time of an occurrence of failures of an inverter, both of two switching elements of the buck-boost converter are switched on so that electric charge is discharged from the smoothing capacitor that smoothes voltage between terminals of the inverter regardless of whether a collision of a vehicle occurs or not (S08-26-2010
20100213903REDUCING STORED ELECTRICAL ENERGY IN A LEAD INDUCTANCE - According to a first aspect of the present invention, reducing electrical energy stored in a load or in one or more leads for connecting a power supply with the load is achieved by plasma process power circuitry including a switch in operative connection with at least one of the leads for enabling/interrupting power to the load; a first electrical nonlinear device; an energy storing device arranged in series with the first electrical nonlinear device; and a pre-charging circuit in operative connection with the energy storing device, the pre-charging circuit configured to charge the energy storing device to a pre-determined energy level while power to the load is enabled.08-26-2010
20100060243Capacitor Module - The capacitor module includes a capacitor, in which a screw hole is arranged on an outer bottom wall surface of a capacitor case housing a capacitor element, and a heat dissipater, on which a plurality of capacitor cases are fixated by screwing fixation screws in the screw holes of the capacitors. As a result, for example, the capacitor can be fixated with reliability and durability secured even under a condition where very strong vibration is continuously applied, for example, when the capacitor module is mounted on construction machinery. Further, because, an adherence of the outer bottom wall surface of the capacitor case on a fixation surface of the heat dissipater is strengthened by screwing the fixation screw in the screw hole, the capacitor can be cooled down by transferring heat produced by the capacitor to the heat dissipater as needed.03-11-2010
20100019736OSCILLATOR CIRCUIT - An oscillation circuit generates a pulse signal. A charging/discharging circuit performs switching between a charging state between a charging state for charging the capacitor and a discharging state for discharging the capacitor. A first to a third comparators compare a capacitor voltage with a first to a third voltages, and generates a first to a third signals corresponding to a comparison result. A control unit switches the charging/discharging circuit to a discharging state according to a first signal and switches the circuit to a charging state according to a second signal. A pulse generating unit generates a pulse signal which allows switching between a high level and a low level, based on either one of the first signal and the second signal, and the third signal in a charging state. The charging/discharging circuit can adjust discharging current while charging current is fixed.01-28-2010
20090174372Analog Output Circuit, Data Signal Line Driving Circuit, Display, and Potential Writing Method - In one embodiment of the present invention, a voltage source is disclosed including a lower output impedance is connected to a capacitive load via a switch element and a voltage source including a higher output impedance is connected to the capacitive load via a switch element. Until a potential of an output terminal attains a reference potential, a comparator keeps the switch element in an ON state so that the voltage source writes a potential onto the capacitive load. When the potential of the output terminal exceeds the reference potential, the comparator causes the switch element to be in an ON state so that the voltage source writes a potential onto the capacitive load so as to have a predetermined potential.07-09-2009
20080203977Boost buffer aid for reference buffer - A circuit for charging a capacitive load to a reference voltage in a capacitive sensor measurement circuit includes a reference buffer, a boost buffer, and drive logic. The reference buffer and the boost buffer are coupled with the capacitive load to be charged. The boost buffer first charges the capacitive load towards the reference voltage at a first rate of charging, and then ceases charging. The reference buffer subsequently continues charging at a slower second rate to settle the voltage across the capacitive load to within a tolerable range of the reference voltage.08-28-2008
20120038327HYBRID WORKING MACHINE - A motor generator operates as a generator and a motor. A converter switches a discharge state where power is supplied from a capacitor to the motor generator and a charge state where the capacitor is charged by the power generated from the motor generator. Electric power that is output from the capacitor in the discharge state and electric power that is input to the capacitor in the charge state are controlled. A capacitor voltmeter measures a terminal-terminal voltage of the capacitor. A capacitor ammeter measures charge/discharge current of the capacitor. The measurement result is input from the capacitor voltmeter and the capacitor ammeter to a controller. The controller controls the converter based on the measurement result.02-16-2012
20120169298SYSTEM AND METHOD FOR ELECTROCHEMICAL DEVICE WITH METAL CONTAINING IONIC LIQUID ELECTROLYTES - Provided are a system and method for storing electrical power with an electrochemical device with a ionic liquid electrolyte having a metal coordination cation. More specifically, the device includes a positive electrode; a negative electrode; and an ionic liquid electrolyte statically disposed between the positive electrode and the negative electrode, the ionic liquid electrolyte having a metal coordination cation. The device may be structured and arranged to permit the metal in the electrolyte to undergo redox reactions such that the electrolyte functions at least in part as both an electrolyte and as an electrode. An associated method of use is also provided.07-05-2012
20110068751SAFETY CAPACITOR DISCHARGING METHOD AND APPARATUS FOR AC-TO-DC CONVERTERS - The present invention discloses a safety capacitor discharging method for AC-to-DC converters, wherein the AC-to-DC converters have a safety capacitor connected between two line voltages, the method comprising the steps of: detecting at least one line voltage to generate a line-off signal, wherein the line-off signal is at a first state when the peak voltage of the at least one line voltage is above a reference voltage, and the line-off signal is at a second state when the peak voltage of the at least one line voltage is below the reference voltage; and performing discharge of the safety capacitor by generating a conduction path between two plates of the safety capacitor when the line-off signal is at the second state. The present invention also provides a safety capacitor discharging apparatus for AC-to-DC converters.03-24-2011
20110050181ELECTROSTATIC POWER HARVESTING - An apparatus for supplying power includes an input port; a charge storage device for storing charge received through the input port; control circuitry configured to transfer charge from the charge storage device and to maintain a bias voltage at the input port; and an output port for delivering power from the control circuitry to a device.03-03-2011
20110316489Power Supply Device - A power supply device according to the present invention includes: a capacitor 12-29-2011
20080211461CAPACITOR CHARGING CIRCUIT, FLASH UNIT, AND CAMERA - The present invention provides a flash discharging circuit for simplifying the charging of electric power in a capacitor. When energy discharged from a transformer for storing and discharging energy is charged in a main capacitor of the circuit, a detection voltage inputted to a first input terminal of a comparator so as to detect a primary current flowing through a primary winding of the transformer is compared with a reference voltage inputted to a second input terminal of the comparator. According to a result of the comparison, it is detected that a predetermined primary current flows through the primary winding of the transformer. When the primary current flowing through the primary winding of the transformer is turned off, the reference voltage is set to be lower than the detection voltage.09-04-2008
20110156663TEST CIRCUIT FOR SERIAL LINK RECEIVER - A test circuit for a serial link receiver includes a first current source coupled to a first input of the serial link receiver, and a second current source coupled to a second input of the serial link receiver. The first current source is symmetrically matched to the second current source. A first switch of the first current source is turned on to permit a charge-retaining mechanism thereof to be charged. A second switch of the first current source is turned on to permit the retained charge retained to be asserted on the first input. The charge turns on a control switch of the first current source, through which the charge is asserted on the first input. A charge-draining mechanism of the first current source is turned on to thereafter permit the charge to be drained in a controlled manner after the charge has been asserted.06-30-2011
20120007567LOW LOSS DISCHARGE CIRCUITS FOR EMI FILTER CAPACITORS - A discharge circuit for an EMI filter capacitor includes normally-ON transistors. The normally-ON transistors may be controlled to limit current through them when an AC source is coupled across the discharge circuit. When the AC source is disconnected from the discharge circuit, the normally-ON transistors turn ON to allow current flow through them. The current flow allows the EMI filter capacitor to be discharged by a discharge resistor.01-12-2012
20120056599APPARATUS FOR CONTROLLING CAPACITOR CHARGE STATUS AND METHOD OF ASSEMBLY - A capacitor charge control assembly for use with a circuit protection device that includes at least one activation capacitor, including at least one input device configured to receive first and second user inputs, and a linkage assembly coupled to the at least one input device such that the at least one input device is movable between a first position and an opposite second position. The control assembly also includes at least one switch coupled to the at least one input device and configured to generate one of a first signal and a second signal, wherein the first signal is based on the first user input and the second signal is based on the second user input, and wherein the first signal causes the at least one activation capacitor to discharge stored energy and the second signal causes the at least one activation capacitor to store energy.03-08-2012
20120062185POWER SOURCE GENERATION CIRCUIT AND INTEGRATED CIRCUIT - A power source generation circuit includes a regulator circuit which receives an external power source voltage VDDA from an external power source, and generates a predetermined internal power source voltage on a given terminal VDD; and a charging circuit which connects the external power source and the given terminal when the external power source voltage VDDA supplied from the external power source is equal to or lower than a predetermined threshold voltage.03-15-2012
20120062184WIRELESS SELF-SUFFICIENT MONITORING SYSTEM FOR A DOOR LOCK MECHANISM - The invention relates to a monitoring system for monitoring a state of a door lock mechanism of a door or of a closure of a storage space of a means of transportation, comprising a generator and a sensor/actuator. The generator produces electrical energy from vibration energy, and the sensor detects the state of the door lock mechanism. The sensor uses the kinetic energy that is produced by the actuation of the door lock to generate an electrical signal, which is then transmitted to a microcontroller.03-15-2012
20120025787APPARATUS AND ASSOCIATED METHODS - An apparatus comprises a rigid-flex circuit board and an electrolyte, the rigid-flex circuit board comprising first and second rigid regions physically and electrically connected to one another by a flexible region, the flexible region comprising first and second sections each comprising an electrically conductive layer and a capacitive element, wherein the apparatus is configured such that a chamber is defined between the first and second sections with the respective capacitive elements contained therein and facing one another, the chamber comprising the electrolyte, and wherein the apparatus is configured to store electrical charge when a potential difference is applied between the respective capacitive elements.02-02-2012
20130009609MONITORING DEVICE AND A METHOD FOR WIRELESS DATA AND POWER TRANSMISSION IN A MONITORING DEVICE - In a monitoring device including a reader and a data carrier, the data carrier includes a receiver coil (01-10-2013
20090134844APPARATUS AND METHOD FOR RECYCLING AND REUSING CHARGE IN AN ELECTRONIC CIRCUIT - An apparatus and method for recycling and reusing charge in an electronic circuit. The apparatus includes at least one capacitor coupled to a circuit block in the electronic circuit, the capacitor being configured to collect current charge consumed by the circuit block when set to a charge collection mode, and a voltage level comparator configured to detect a fully charged state when the capacitor is fully charged. Further, the apparatus includes a first electrical switch configured to allow, once the fully charged state is detected, the capacitor to switch to a discharge mode for discharging the current charge collected back into the power supply for reuse by the electrical system and a second switch configured to allow, after the capacitor has fully discharged the current charge collected, the capacitor to switch back to the charge collection mode, such that, the current charge is recycled and reused by the electrical system.05-28-2009
20110089909ELECTRIC ENERGY STORAGE MODULE CONTROL DEVICE - Provided is an electric energy storage module control device for controlling an electric energy storage module (04-21-2011
20100117604Lead acid battery de-sulfation - A de-sulfating device including a plurality of capacitive discharge channels selectively activatable by a control board to provide a pulse wave modulated de-sulfating current to a lead-acid battery. Some exemplary embodiments may provide a de-sulfating current comprising a repeating pattern including an about 0.75 ms ON pulse followed by an about 4.5 ms OFF period, which may be applied to the battery at an operator-adjustable peak amperage of about 0-350 amps. The extent of sulfation of the battery may be ascertained by measuring the impedance of the battery.05-13-2010
20100289458CAPACITOR ELECTROLYTE - A capacitor for an implantable medical device is presented. The capacitor includes an anode, a cathode, a separator therebetween, and an electrolyte over the anode, cathode, and separator. The electrolyte includes ingredients comprising acetic acid, ammonium acetate, phosphoric acid, and tetaethylene glycol dimethyl ether. The capacitor has an operating voltage ninety percent or greater of its formation voltage.11-18-2010
20100244785Source Power Limiting Charging System - Methods and systems for charging energy storage devices are disclosed. Often the charging circuit may have different levels of power available to charge the energy storage device depending on the state of other subsystems of the electronic system. The present invention provides a source power limiting charging system. Often the losses of the charging system and losses due to the power requirements of support systems are not well known and/or are variable. Controlling source power to the charging system maximizes the amount of power delivered to the energy storage device for a given value of these losses and avoids power contention with the other elements of the electronic system. Therefore, the power drawn from the power source by a controllable power limiting charging circuit is controlled to be less than a source power limit.09-30-2010
20120126756Charge-driven electrostatic inductance - Charge-Driven Electrostatic Induction is a method for using modest voltage to induce large density electric charge across a large insulation gap. Large density equal and opposite charges are first created in a high performance capacitor adjacent said insulation gap. One charge is trapped on its electrode and the other charge is relocated further from the gap so the electric field from the trapped charge, with minimum interference, induces equal and opposite charge across the gap and stores large density electric energy in the insulation. With electrode area to gap ratio kept sufficiently large to limit field fringing, Charge-Driven Electrostatic Induction will rival electromagnetic motor performance. In practice it will be superior. Using layered, thin film components will eliminate permanent magnets, coils, ferromagnetic materials and large power current sources. The multi-step process will permit high operating speeds.05-24-2012
20120256600IONIC ELECTRON CONDUCTIVE POLYMER CAPACITOR - Technologies are generally described for an electron conductive polymer capacitor may incorporate a conductive polymer mixture embedded with carbon nanoparticles between electrodes to rapidly charge and store large amounts of charge compared to conventional electrolytic capacitors. Such a capacitor may be constructed with a laminate sheet including layers of inner and outer electrodes, an electrolyte mixture between the electrodes, a conductive polymer mixture, and a composite mixture of carbon nanoparticles embedded in the conductive polymer between the inner electrodes. The laminate sheet may be wound into a roll and the inner and outer electrodes are coupled electrically. When an electric field is applied, cations within the electrolyte mixture move towards the outer electrodes and anions towards the inner electrodes. Further, the inner conductive polymer layer is ionized causing electrons to move toward the inner electrodes to be deposited onto high surface area carbon nanoparticles where charge is stored.10-11-2012
20120313590RECHARGEABLE BATTERY - A rechargeable battery is disclosed. The rechargeable battery of the invention includes a high density capacitor and an integrated circuit. The high density capacitor is connected to a ground terminal and a first node carrying a first voltage. The integrated circuit includes a band gap circuit, a first detecting unit, a voltage divider, a second detecting unit and at least one low dropout voltage regulator. The band gap circuit generates a band gap voltage according to the first voltage. The first detecting unit measures the first voltage and determines whether to apply an input charging voltage to the high density capacitor. The voltage divider is connected in parallel with the high density capacitor and has a second node carrying a second voltage. The second detecting unit measures the second voltage according to the band gap voltage and determines whether to connect a third node to the first node. Each low dropout voltage regulator is connected to the third node and generates a specified voltage output and a specified current output according to the band gap voltage and the first voltage.12-13-2012
20120169299Method of Using a Container for a Refrigerated Fluid, and a Corresponding Container - A container for a refrigerated fluid having an external container and an internal container between which an evacuated intermediate space is situated, which contains a superinsulator formed by several, separated layers of foil provided with a metal layer, is used as a storing device for electric energy. The foils act as foil capacitors and are electrically contacted so that an electric voltage can be applied to corresponding electric terminals on the exterior side of the container. In the container, a metal layer can be provided on both surfaces of the foil(s), and the foil(s) may consist of a material with a semiconductor characteristic. The foil capacitors are electrically connectable in series or parallel, and the electrical contacting of the foil metal surfaces can take place via a suspension structure of the internal container in the external container.07-05-2012
20100052625In Situ Verification of Capacitive Power Support - A mechanism for in situ verification of capacitive power support is provided. A memory system uses a super capacitor to support a voltage rail when input power is lost or interrupted. The voltage discharge curve is a function of load and capacitance of the component. By stepping the regulated power supply to a lower output within the voltage range and recording voltage and current draw at the super capacitor as it discharges to the new regulator output voltage, the super capacitor holdup capability can be tested.03-04-2010
20120313591Energy Storage Media for Ultracapacitors - An ultracapacitor includes at least one electrode that includes carbon nanotubes. The carbon nanotubes may be applied in a variety of ways, and a plurality of layers may be included. Methods of fabrication of carbon nanotubes and ultracapacitors are provided.12-13-2012
20120229100OPTIMIZED SOFTWARE-DRIVEN SOFT-START ALGORITHM - A soft-start charging method, computer-readable medium, and apparatus for controlling charging of at least one capacitor by obtaining a zero-crossing time, which is a time when a zero-crossing of a source voltage will occur; obtaining an advance time, which is an amount of time; and calculating a trigger time based on the advance time and the zero-crossing time. The method also includes triggering a switch to close at the calculated trigger time; charging the at least one capacitor with the source voltage with the closing of the switch for a charging time period; and opening the switch at the end of the charging time period. The steps of obtaining the zero-crossing time, the obtaining the advance time, the calculating, the triggering, the charging, and the opening are repeated until the at least one capacitor is fully charged.09-13-2012
20120299557WIRELESS POWER AND DATA TRANSMISSION SYSTEM - Provided is a wireless power data transmission system that may transmit wireless power and may transmit data using wireless power. A wireless power transmitter may include capacitors, and may convert an electrical connection of the capacitors to a parallel connection for charging. The wireless power transmitter may also convert the electrical connection of at least two of the capacitors to a series connection for discharging.11-29-2012
20110121792Energy Capture Circuit - An energy capture circuit for capturing energy in response to an input pulse. The circuit is constructed and arranged to transfer input energy in time divided portions among subcircuits. This includes a storage means, a clock means, at least two subcircuits, and at least one transfer circuit. Each subcircuit includes a first inductive means in operative communication with the input source, a rectifying means for producing a positive current in operative communication with the first inductive means, a capacitive means in operative communication with the rectifying means, and a switch means in operative communication with the capacitive means. At least one transfer circuit is in operative communication with each of the switch means of the at least two subcircuits. The output of the clock means is in operative communication with both a first switch means and an inverter means, the inverter means having an output in operative communication with a second switch means.05-26-2011
20100327819CAPACITOR WITH AN INTERNAL DUMP RESISTANCE - The present embodiments provide a capacitor system, comprising a capacitor, a switch, and an internal dump resistor coupled with the switch, such that the switch when activated couples the internal dump resistor with the capacitor to drain a charge from the capacitor.12-30-2010
20120268079DISCHARGE CONTROL CIRCUIT - A discharge control circuit that allows an electric charge accumulated in a smoothing capacitor, which is interposed between a main power source that supplies DC power to an electric circuit and the electric circuit, to be discharged when connection between the main power source and the electric circuit is interrupted, includes a series resistor section formed by connecting a first resistor and a second resistor in series with each other and connected in parallel with the smoothing capacitor; and a switch connected in parallel with the first resistor, controlled to a non-conductive state when connection between the main power source and the electric circuit is maintained, and controlled to a conductive state to short-circuit both ends of the first resistor when connection between the main power source and the electric circuit is interrupted.10-25-2012
20120268078DISCHARGING A DC BUS CAPACITOR OF AN ELECTRICAL CONVERTER SYSTEM - A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.10-25-2012
20100237833MULTI-OUTPUT POWER SUPPLY DEVICE - A multi-output power supply device of low noise is disclosed that converts a first input voltage to plural different voltages. The multi-output power supply device includes a first power supply circuit for generating a constant voltage from the first input voltage, and outputs the constant voltage through a first output terminal; and one or more second power supply circuits each including a charge pump circuit for generating a constant voltage from the output voltage from the first power supply circuit. Each of the second power supply circuits changes a period of a charging and discharging cycle for charging and discharging a flying capacitor according to an electric current output from the second output terminal.09-23-2010
20120081082FREQUENCY GENERATOR WITH FREQUENCY JITTER - A frequency generator with frequency jitter is disclosed. The frequency generator comprises a capacitor, a comparing unit, a charging and discharging unit, a delay unit, and a charging and discharging switch unit. The comparing unit is coupled to the capacitor and generates a charging and discharging control signal according to a voltage of the capacitor. The charging and discharging unit is coupled to the capacitor. The delay unit is coupled to the comparing unit and receives a delay signal. The delay unit delays the charging and discharging control signal according to the delay signal to generate a charging and discharging delay signal. The charging and discharging switch unit is coupled to the charging and discharging unit and the delay unit, and charges or discharges the capacitor according to the charging and discharging delay signal.04-05-2012
20120133341Control of Silver Vanadium Oxide Surface Areas as a Means of Controlling Voltage Delay and RDC Growth in an Electrochemical Cell - An electrochemical cell comprising a lithium anode, a cathode comprising a blank cut from a free-standing sheet of a silver vanadium oxide mixture contacted to a current collector. The active material has having a relatively lower surface area and an electrolyte activating the anode and the cathode is described. By optimizing the cathode active material surface area in a SVO-containing cell, the magnitude of the passivating film growth at the solid-electrolyte interphase (SEI) and its relative impermeability to lithium ion diffusion is reduced. Therefore, by using a cathode of an active material, in a range of from about 0.2 m05-31-2012
20100001696SYSTEM TO IMPROVE A MULTISTAGE CHARGE PUMP AND ASSOCIATED METHODS - A system to improve a multistage charge pump may include a capacitor, a first plate carried by the capacitor, and a second plate carried by the capacitor opposite the first plate. The system may also include a clock to control charging and discharging of the capacitor. The system may further include a power supply to provide a power supply voltage across the first plate and the second plate during charging of the capacitor. The system may also include a voltage line to lift the second plate to an intermediate voltage during discharging of the capacitor. The system may further include an output line connected to the first plate during discharging of the capacitor to provide an output voltage.01-07-2010
20130169240THIN-FILM CAPACITOR DISCHARGING APPARATUS - The invention provides a thin-film capacitor discharging apparatus with an inexpensive configuration that can stably produce a constant voltage upon discharging a thin-film capacitor. The thin-film capacitor discharging apparatus is featured by discharging a thin-film capacitor for use in a direct current circuit, and including a discharging function serving as a hybrid such that direct current is received from the thin-film capacitor with voltage becoming lowered to temporarily store electric charge to supply the direct current to a DC/DC inverter while a basic voltage remains until the thin-film capacitor becomes completely empty of electric charge.07-04-2013
20130093400MAXIMIZING LIFE OF CAPACITORS IN SERIES MODULES04-18-2013
20110221400CHARGE CONTROLLER - There is provided a charge controller capable of charging a capacitor while suppressing the progress of deterioration of the capacitor without unnecessary charge/discharge of the capacitor.09-15-2011
20110221399CAPACITANCE DETECTOR - A capacitance detector includes: a first capacitor with fixed base capacitance and variable capacitance; a second capacitor charged with base charge corresponding to the base capacitance; third and fourth capacitors which receive capacitance distribution from the first or second capacitor; a first switching means for charging the first and second capacitors to a first fixed voltage and charging the third and fourth capacitors to a second fixed voltage in a first section and for charging the first and second capacitors to the second fixed voltage and charging the third and fourth capacitors to the first fixed voltage in a second section; a second switching means for separating the first and second capacitors from the third and fourth capacitors and for connecting the first and second capacitors to the third and fourth capacitors; and a differential amplifier to which first and second voltages corresponding to equalized charge are differentially input.09-15-2011
20130147440POWER SUPPLY CONTROL CIRCUIT AND POWER SOURCE CUT-OFF DETECTION METHOD - A power supply control circuit arranged to prevent a steady power loss from occurring in an input filter connected to an alternating current power source. In order to detect that an AC input has been turned off, diodes are connected to AC lines, thus detecting a full-wave rectified waveform. This detected voltage is compared with a reference voltage by a comparator. An output signal of the comparator is input into the reset terminal of a timer circuit having a time measurement period longer than the power source frequency of an alternating current power source. A switch element of a discharging circuit is turned on by an output signal of the timer circuit.06-13-2013
20100283434ELECTRICITY ACCUMULATING DEVICE - An electricity accumulating device includes capacitors connected in series, balanced voltage adjusting portions connected to the capacitors respectively, and a control circuit connected to the balanced voltage adjusting portions. The control circuit performs the following operations: measuring two voltages at different times from each other across each capacitor during the non-charge-or-discharge period of the capacitors by using the balanced voltage adjusting portions; calculating the absolute value of the difference between the two voltages; determining the balanced voltage of each of the capacitors according to the absolute value; and controlling the balanced voltage adjusting portions to make the voltage across each capacitor a balanced voltage.11-11-2010
20120274288PROVIDING IN RUSH CURRENT TOLERANCE TO AN ELECTRONIC DEVICE - According to one embodiment, an apparatus (11-01-2012
20110234177POWER SUPPLY DEVICE HAVING PRECHARGING FUNCTION - A power supply device includes a battery 09-29-2011
20110234176DISCHARGE CONTROL APPARATUS - A discharge control apparatus for discharging a residual charge that accumulates in a smoothing capacitor interposed between a direct current main power supply and an inverter, which performs a voltage conversion between a direct current power and an alternating current power, and remains in the smoothing capacitor when a connection between the inverter and the main power supply is cut, the discharge control apparatus. The discharge control apparatus having a backup power supply and a discharge control unit that is provided independently of a driver circuit for applying a switching control signal to a switching element constituting the inverter in order to operate the switching element in a saturation region, and that generates a discharge control signal for operating the switching element in an active region and applies the generated discharge control signal to the switching element.09-29-2011
20130154580APPARATUS FOR CHARGING THIN-FILM CAPACITORS - It is possible to prevent overcurrent from flowing at the time of initially charging thin-film capacitors with an inexpensive configuration. There are provided a direct current power supply DC supplying direct current to plural thin-film capacitors, resistors connected in series to the respective thin-film capacitors for limiting the current value of the direct current to be supplied from the direct current power supply DC to the thin-film capacitors, and series-parallel system changeover switches SW connected in series to the respective thin-film capacitors and having one contacts establishing, when selected, a series connection short-circuiting both ends of each thin-film capacitor and other contacts establishing, when selected, parallel connections supplying direct current through the resistors to the thin-film capacitors. A charging operation switch SW1 and a discharge operation switch SW2 are switched so that, at the time of charging, current supplied to the thin-film capacitors C is suppressed by the resistors by the parallel connections, and, at the time of discharging, discharging is permitted by the series connection, irrespective of the resistors.06-20-2013
20130181685Charging Circuit for Capacitor - A charging circuit for a capacitor includes a current mirror module including a first branch circuit, a second branch circuit and a third branch circuit for supplying a plurality of output currents respectively, a switching module coupled to the first branch circuit and the second branch circuit for determining a conducting condition of the switching module according to the plurality of output currents from the first branch circuit and the second branch circuit, and an active loading circuit coupled to the third branch circuit and the switching module for adjusting a current passing through the active loading circuit according to the conducting condition of the switching module. The capacitor has one end coupled to the first branch circuit and the switching module to process a charging operation according to the output current of the first branch circuit.07-18-2013
20130181686DISCHARGE CONTROLLER AND ELECTRIC VEHICLE - A discharge controller is configured to periodically receive from a host controller a pulse signal, as a discharge control signal, which indicates a command for controlling a discharge device that discharges a capacitor, and when a duty ratio of the received discharge control signal deviates from a predetermined duty ratio of the discharge control signal, control the discharge device on the basis of a last command indicated by the discharge control signal received last time.07-18-2013
20110309803Method for Switching an Electrical Load in a Bridge Branch of a Bridge Circuit, and Bridge Circuit - In one embodiment, a method for switching an electrical load having at least one capacitive component and one inductive component in a bridge branch of a bridge circuit comprises a charging of the bridge branch to a first voltage (V12-22-2011
20120019216ACTUATION OF SHAPE MEMORY ALLOY MATERIALS USING ULTRACAPACITORS - A system, in certain embodiments, includes a power supply. The power supply includes an ultracapacitor configured to be charged by a DC source. The power supply also includes a first switch that enables charging of the ultracapacitor by the DC source when in a closed position and disables charging of the ultracapacitor when in an open position. The power supply further includes a second switch configured to enable discharging of the ultracapacitor when in a closed position and to disable discharging of the ultracapacitor when in an open position. As the ultracapacitor is discharged, a current is supplied to actuate a shape memory alloy element.01-26-2012
20130200859CAPACITOR DISCHARGE IN A CELL BASED VOLTAGE SOURCE CONVERTER - A method and a device to discharge cell capacitors in a cell based voltage source converter. Each cell has switching elements in half bridge or full bridge configuration and a capacitor in parallel to the half or full bridge. Each cell has two terminals, whereof at least one is between two switching elements. The converter has AC and DC terminals, with the possibility to connect each of the terminals to ground, via a further switching element. A resistor is implemented into at least one of the ground connections. To discharge to capacitors, the switching elements in the respective cells are configured such, that the capacitor is in parallel connection to the terminals. The capacitors are thus discharged via the resistor to ground.08-08-2013
20120086410CAPACITOR CHARGER SYSTEM AND DIGITAL CONTROL MODULE AND ISOLATED ACQUISITION MODULE FOR SUCH A CAPACITOR CHARGER SYSTEM - The invention relates to a capacitor charger system (04-12-2012
20120086409TECHNIQUE FOR FULLY DISCHARGING A STORAGE CAPACITOR IN A FIRING CIRCUIT FOR AN ELECTRO-EXPLOSIVE DEVICE - A firing circuit configured for complete discharge of a storage capacitor is provided with a storage capacitor, an inductor, a diode, a transistor switch having a gate to which the inductor and the diode are connected in series, the inductor and the capacitor being configured for inductor capacitor ringing, the inductive capacitive ringing creating upon initiation of the circuit a gate voltage at the gate above an initial capacitor voltage of the storage capacitor; and the diode blocking the discharge of the gate voltage ensuring that the capacitor can be fully discharged.04-12-2012
20130207619DEVICE AND METHOD TO DISCHARGE A CAPACITOR FOR USE IN THE ELECTRIC POWER SYSTEM OF AN ELECTRIC DRIVE VEHICLE - A discharge device and method actively discharge a main capacitor in an electric-power system, of an electric-drive vehicle. The discharge device comprises a discharge branch of a circuit that is connected in parallel to the main capacitor and includes a discharge transistor that is biased to “conduction” mode when, the main capacitor is required to be discharged. A control device is connected to a “gate/base” terminal, of the discharge transistor and commands the discharge transistor, biasing the discharge resistor to “conduction” mode when the main capacitor is required to be discharged. The control device includes a safety capacitor that is interposed between the “gate/base” terminal and a power supply and charges when the discharge transistor is in the “conduction” mode, causing a progressive decrease of current at the “gate/base” terminal until the discharge transistor is biased to the non-conductive state.08-15-2013

Patent applications in class CAPACITOR CHARGING OR DISCHARGING

Patent applications in all subclasses CAPACITOR CHARGING OR DISCHARGING