Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems December patent applications/inventions, industry category 12/10

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
12/30/2010 > patent applications in patent subcategories.

20100328968 - Multi-phase resonant converter and method of controlling it: A PWM controlled multi-phase resonant voltage converter may include a plurality of primary windings powered through respective half-bridges, and as many secondary windings connected to an output terminal of the converter and magnetically coupled to the respective primary windings. The primary or secondary windings may be connected such that a... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20100328967 - Resonant power converter: A resonant power converter including synchronous rectifiers adapted to operate with an overlapping conduction phase and a fixed frequency.... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20100328969 - Resonant power converter comprising a matched piezoelectric transformer: The present invention relates to an electronic power converter comprising a piezoelectric transformer, a drive circuit arranged to generate and provide an input voltage signal to the piezoelectric transformer, said input voltage signal comprising a burst frequency and a substantially constant excitation frequency, and a rectifier module. According to the... Agent: Harness, Dickey & Pierce, P.L.C

20100328970 - Single-stage high-voltage power supply with high efficiency and low network distortion: The invention includes a high-voltage power supply connected, by a network input, to an AC network of frequency Fr, with n phases, and providing a high DC output voltage at at least one HV output. The power supply includes a single-phase high-voltage conversion module per phase of the network having... Agent: Baker & Hostetler LLP

20100328971 - Boundary mode coupled inductor boost power converter: Methods, systems, and devices are described for using coupled inductor boost circuits to operate in a zero current switching (ZCS) and/or a zero voltage switching (ZVS) boundary mode. Some embodiments include a coupled inductor boost circuit that can substantially eliminate rectifier reverse recovery effects without using a high side primary... Agent: Townsend And Townsend And Crew, LLP

20100328972 - Voltage converter circuit and method for a clock supply of energy to an energy storage: The present invention provides a voltage converter circuit for the clocked supply of energy to an energy storage based on an input voltage applied at an input applied at an input of the voltage converter circuit. The voltage converter circuit includes an energy storage and a switch arrangement, wherein the... Agent: Schoppe, Zimmermann , Stockeler & Zinkler C/o Keating & Bennett, LLP

20100328973 - Ac coupled switching power supply and method therefor: A circuit for converting high voltage AC to low voltage DC has an input capacitor coupled an input AC source. A rectifier is coupled to the input capacitor. A switch is coupled to the rectifier. A voltage regulator is coupled to the switch. The voltage regulator regulates an output of... Agent: Weiss & Moy PC

20100328975 - Power converter: In a power converter for converting AC power supplied from an AC power source or DC power supplied from a DC power source to DC power or AC power having predetermined voltage and frequency including at least one switching device (130) configured to be operable at high temperature, at least... Agent: Birch Stewart Kolasch & Birch

20100328974 - Resonant converter for achieving low common-mode noise, along with isolated power supply and method employing the same: Embodiments are described for reducing common-mode current in electronic devices. In the various embodiments, a resonant converter is employed, for example in a power supply, and the resonant converter is driven by a DC input to generate an AC primary voltage on the primary windings of a power transformer. The... Agent: Agilent Technologies, Inc. In Care Of: Cpa Global

20100328976 - Cascode configured switching using at least one low breakdown voltage internal, integrated circuit switch to control at least one high breakdown voltage external switch: An electronic system includes a low breakdown voltage (LBV) switch internal to an integrated circuit controller to control conductivity of an external, high breakdown voltage (HBV) switch. In at least one embodiment, the internal LBV switch and a cascode configuration of the LBV and HBV switches allow the controller to... Agent: Hamilton & Terrile, LLP

20100328977 - Method for controlling a voltage source converter and a voltage converting apparatus: In a method for controlling a Voltage Source Converter having at least one phase leg comprising a series connection of switching elements, in which each said element has at least two semiconductor devices of turn-off type, at least two free-wheeling diodes connected in parallel therewith and at least one energy... Agent: Birch Stewart Kolasch & Birch

20100328978 - Variable frequency transformer having multiple horizontal rotary transformers with common controls and voltage infrastructure and method: A variable frequency transformer including: a first parallel circuit including at least two of the rotary transformers arranged in parallel and having an isolating circuit breaker connected to a rotor winding of each of the rotary transformers, and a separate synchronizing circuit breaker connected to a stator winding in each... Agent: Nixon & Vanderhye P.C.

12/23/2010 > patent applications in patent subcategories.

20100321955 - Apparatus for transfer of electrical energy: An apparatus for transfer of electrical energy between a primary side and a secondary side. The apparatus includes: at least one voltage input on the primary side; at least one transformer, wherein the transformer has on the primary side at least a first winding area and a second winding area;... Agent: Bacon & Thomas, PLLC

20100321956 - Control method, constant current control method, method for generating a real current source to represent average current through a winding, constant current and constant voltage power converter, switch controller, and average voltage detector: An embodiment provides a control method capable of controlling a switching-mode power supply to provide an output power source. The switching-mode power supply has a winding coupled to an input power source and controlled by a switch to be energized or de-energized. The maximum current peak through the winding is... Agent: North America Intellectual Property Corporation

20100321957 - Standby power method and apparatus for power module applications: The present invention discloses a standby power saving method for power module applications, comprising the steps of: generating a mode signal according to voltage comparison of a feedback signal and a threshold voltage, wherein the mode signal has a normal mode state and a standby mode state; generating a pulse... Agent: Apex Juris, PLLC

20100321959 - Converter: A converter includes a control unit configured to turn ON, when an output voltage is set to a low voltage, a switching element according to a pulse voltage induced in a first auxiliary winding of a transformer. The control unit operates based on a direct current voltage output by rectifying... Agent: Canon U.s.a. Inc. Intellectual Property Division

20100321960 - Switching power supply unit: The switching power supply unit includes: a transformer having a primary winding and two secondary windings; and a rectifying-smoothing circuit having two rectifying elements, three choke coils and a capacitive element. A first rectifying element is between a junction of ends of the first secondary winding and the second choke... Agent: Oliff & Berridge, PLC

20100321958 - Power converter employing a variable switching frequency and a magnetic device with a non-uniform gap: A power converter including a power switch, a controller for controlling a switching frequency thereof, and a magnetic device with a non-uniform gap. In one embodiment, the power converter includes a power switch and a magnetic device coupled to the power switch and having a non-uniform gap. The power converter... Agent: Slater & Matsil, L.L.P.

20100321962 - Frequency modulation controller, switch mode power supply including the same, and switching operation frequency modulation method: The present invention uses a ripple of an input voltage so as to modulate a switching operation frequency of a switch mode power supply. A sensing voltage corresponding to the input voltage is received, a current ripple that is proportional to a difference between a peak value of the sensing... Agent: Okamoto & Benedicto, LLP

20100321961 - Insulation transformer and key input circuit having the same: An insulation transformer and a key input circuit having the same are disclosed. The insulation transformer includes: a core having a certain gap; and primary and secondary coils wound on the core. According to the insulation transformer, the operation deficiency of the insulation transformer can be reduced and thus the... Agent: Birch Stewart Kolasch & Birch

20100321963 - Switching power supply apparatus and semiconductor device: A semiconductor device providing a control circuit for controlling a switching power supply apparatus includes: an intermittent-oscillation control circuit which outputs an enable signal providing instructions to execute and suspend switching alternately; a turn-on control circuit which changes between an execution state and a suspension state of the switching according... Agent: Greenblum & Bernstein, P.L.C

20100321964 - Power adapter employing a power reducer: A power adapter including a power reducer for no-load or light load applications and method of operating the same. In one embodiment, the power adapter includes a capacitor coupled to an input of the power adapter, and a bleeder switch coupled in parallel with the capacitor. The power adapter also... Agent: Slater & Matsil, L.L.P.

20100321965 - Direct power converting apparatus: A transistor is brought into conduction when, for example, a voltage between both ends of a second clamp capacitor exceeds a predetermined reference voltage. A resistance value of a discharge resistor is smaller than a value obtained by dividing the reference voltage by the maximum value of a current flowing... Agent: Birch Stewart Kolasch & Birch

20100321966 - Semiconductor switch and power conversion system provided with semiconductor switch: A semiconductor switch is provided with a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage, an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element, and a high-speed freewheel diode having... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100321967 - Regulated output current and slope control: The present invention is directed to current mode output control with a current mode (CM) region of the high voltage output curve (VI) slope controlled by component selection and arrangement in the construction of high voltage power supplies. The controlled CM current slope output, the tapped multiplier feedback network, and... Agent: Richard D. Clarke Law Office Of Richard D. Clarke

20100321968 - Load fault handling for switched reluctance or induction type machines: An electrical power generation system includes a power source (102) and power conversion electronics (104) coupled to the power source to rectify phased currents received from the power source and maintain a power conversion voltage used to provide excitation to the power source. The system also includes a power conditioner... Agent: Cantor Colburn LLP - Hamilton Sundstrand

20100321969 - Semiconductor device and power supply device using the same: A semiconductor device capable of reducing an inductance is provided. In the semiconductor device in which a rectification MOSFET, a commutation MOSFET, and a driving IC that drives these MOSFETs are mounted on one package, the rectification MOSFET, a metal plate, and the commutation MOSFET are laminated. A current of... Agent: Antonelli, Terry, Stout & Kraus, LLP

12/16/2010 > patent applications in patent subcategories.

20100315837 - Method for operating a switching-mode power supply: A method for operating a switching power supply is provided. A switching element is switched on and off by a switching signal with a variable switching frequency. A frequency bandwidth is predefined for determining average levels of a frequency spectrum of the switching signal. The switching frequency is modulated by... Agent: Siemens Corporation Intellectual Property Department

20100315838 - System and method for emissions suppression in a switch-mode power supply: In one embodiment, a method of operating a switched-mode power supply that has a switch coupled to a drive signal is disclosed. The method includes deactivating the drive signal at a first instance of time, and comparing a power supply signal to a threshold after deactivating the drive signal. The... Agent: Slater & Matsil, L.L.P.

20100315839 - Energy recovery snubber circuit for power converters: An energy recovery snubber circuit for use in switching power converters. The power converters may include a switch network coupled to a primary winding of an isolation transformer, and rectification circuitry coupled to a secondary winding of the isolation transformer. The energy recovery snubber circuit may include clamping circuitry that... Agent: Marsh, Fischmann & Breyfogle LLP

20100315840 - System and method for indirect control of a converter output: One embodiment of the invention relates to a power apparatus. The power apparatus includes a power converter configured to convert an input voltage to an output voltage for providing power at an output thereof to which a load is connectable. The converter can include an isolation barrier configured to electrically... Agent: Texas Instruments Incorporated

20100315842 - Drive circuit for semiconductor switching element: A drive circuit of first and second switches includes a first series circuit having a capacitor and a primary winding of a transformer and connected to both ends of a pulse signal generator, a first secondary winding of the transformer to apply a voltage to a control terminal of the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100315843 - Method of detection for output short circuit of a flyback power supply: Disclosed are methods of detection for output short circuit of a flyback power supply, which detect the current sense signal provided by a current sense resistor serially connected to a power switch of the flyback power supply, and thus quickly identify whether or not the flyback power supply suffers output... Agent: Rosenberg, Klein & Lee

20100315841 - Semiconductor device and switching power supply apparatus: A switching power supply apparatus includes: a turn-on control circuit which generates a turn-on signal; a feedback control circuit which generates a reference voltage VEAO indicating a limitation level for a current ID flowing into a switching element, by referring to a feedback signal IFB indicating an output current voltage... Agent: Greenblum & Bernstein, P.L.C

20100315844 - Method for operating a dc-dc converter: A method of operating a DC-DC converter according to the current mode control is provided. A current measuring signal for determining a turn-off time of a converter switching element is supplied to a PWM controller and a voltage that is proportional to the current measuring signal is compared by a... Agent: Siemens Corporation Intellectual Property Department

20100315845 - Power source circuit and projection display device: A power source circuit includes a DC voltage generating section which rectifies and smoothes an input AC voltage to generate a DC voltage; a switching regulator which converts the DC voltage into an AC voltage; a transformer which lowers the AC voltage; a first switch connected between a secondary winding... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20100315847 - Component fault detection for use with a multi-phase dc-dc converter: Provided herein are circuits, systems and methods that monitor for a fault within a multi-phase DC-DC converter. This can include monitoring the channels of the DC-DC converter for way out of balance (WOB) conditions, and monitoring for a component fault in dependence on detected WOB conditions. A fault can be... Agent: Fliesler Meyer LLP

20100315846 - Switching power supply and over-temperature protection method: A switching power supply includes an energy-storing device, a power switch, a driving circuit and a thermal sensing device. The energy-storing device is coupled to an input power source and controlled by the power switch to increase or decrease the power therein. The power switch has a control terminal connected... Agent: North America Intellectual Property Corporation

20100315848 - time domain voltage step down capacitor based circuit: A time domain voltage step down capacitor based circuit has an oscillating circuit for generating a clock signal. The circuit also has a capacitor based charge pump circuit for receiving the clock signal and an input voltage signal having an input current and generates an output voltage signal, less than... Agent: Dla Piper LLP (us )

20100315849 - Power supply control: Systems and methods for operating an uninterruptable power supply are provided. The uninterruptable power supply may include a rectifier that has a transistor and an inductor. The uninterruptable power supply may also include a controller. A current sensor can be configured to detect inductor current and to provide a detected... Agent: Lando & Anastasi, LLP A2000

20100315850 - Power inverter: A power inverter is provided for converting DC power into AC power. The inverter may be operable to couple to two or more transformer modules each operable to convert at least a portion of the DC power to at least a portion of the AC power. In one embodiment, two... Agent: Capra J'neva Devi

20100315851 - Circuit arrangement and method for supplying a capacitive load: A circuit arrangement (S) for supplying a load (P), whose essential electric property is capacitance, from a DC voltage source (U0) has a switch element (S1), which in the operational state is alternately switched between the conductive and non-conductive state, and at least one component (L1, L2) whose essential property... Agent: The Procter & Gamble Company Global Legal Department - Ip

12/09/2010 > patent applications in patent subcategories.

20100309689 - Bootstrap circuitry: This invention generally relates to a bootstrap circuit for a switch mode power supply, a controller for a switch mode voltage converter, a switch mode flyback converter comprising the bootstrap circuit, a switch mode forward converter comprising the bootstrap circuit, and a method of bootstrapping a switch mode power converter.... Agent: Tarolli, Sundheim, Covell & Tummino L.L.P.

20100309690 - Switching power supply apparatus and semiconductor device: The switching power supply apparatus according to the present invention includes: a transformer including a primary winding, a secondary winding, and an auxiliary winding; a switching device connected to the primary winding; an output voltage generation circuit which is connected to the secondary winding and generates an output voltage; an... Agent: Greenblum & Bernstein, P.L.C

20100309691 - Dc/dc converter with fullwave regulation: A secondary circuit for a DC/DC converter, the secondary circuit having a main outlet and an auxiliary outlet, the secondary circuit comprising a main automatically controlled synchronous rectifier circuit receiving a voltage from the secondary winding of a transformer having an intermediate tap and delivering firstly a fullwave first rectified... Agent: Sughrue Mion, PLLC

20100309692 - Power conditioning units: We describe a power conditioning unit with maximum power point tracking (MPPT) for a dc power source, in particular a photovoltaic panel. A power injection control block has a sense input coupled to an energy storage capacitor on a dc link and controls a dc-to-ac converter to control the injected... Agent: Tarolli, Sundheim, Covell & Tummino L.L.P.

20100309693 - Driving method and driving device for driving a polyphase inverter: A driving method for driving a polyphase inverter includes: receiving a reference input that includes a fundamental frequency component, and a previously generated feedback signal; generating an error signal that corresponds to a difference between the reference input and the previously generated feedback signal; attenuating the error signal to the... Agent: Foley And Lardner LLP Suite 500

20100309694 - Start-up circuit to discharge emi filter for power saving of power supplies: A start-up circuit to discharge EMI filter is developed for power saving. It includes a detection circuit detecting a power source for generating a sample signal. A sample circuit is coupled to the detection circuit for generating a reset signal in response to the sample signal. The reset signal is... Agent: Sinorica, LLC

20100309695 - Method and apparatus for improved burst mode during power conversion: A method and apparatus for coupling power to an AC power grid. In one embodiment, the method comprises interleaving a storage period and a burst period, wherein (i) energy is stored during the storage period for a predetermined number of grid voltage cycles, and (ii) stored energy is converted to... Agent: Raymond R. Moser Jr., Esq. MoserIPLaw Group

20100309696 - Electrically-isolated ac/dc converter: An AC/DC converter has at its input a rectifier circuit connected in series with a primary winding of an isolating transformer and with a chopper switch (T1) connected to a pulse width modulation control circuit. The isolating transformer has a first secondary winding wound in the same direction as the... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20100309697 - Input current generating scheme for buck-boost controller: A control circuit for a buck-boost circuit includes an inductor current sensor and an input current generator. The input current generator accepts a signal from the inductor current sensor and outputs a synthesized and integrated signal representing the average input current to the buck-boost circuit. The input current generator averages... Agent: Lincoln Electric Company/perkins Coie LLP

20100309700 - Power converter: An inverter circuit (120) is configured so as to perform synchronous rectification by six switching elements (130). The switching element (130) is formed of an unipolar device (SiC MOSFET in this case) using a wideband gap semiconductor. The inverter circuit (120) uses the body diode (131) of SiC MOSFET (130)... Agent: Birch Stewart Kolasch & Birch

20100309699 - Power factor correction circuit: A power factor correction circuit includes a filter capacitor interposed between AC input terminals, a first inductor interposed between the first end of the filter capacitor and an input of a first rectifying bridge circuit, and a second inductor interposed between the second end of the filter capacitor and another... Agent: Rabin & Berdo, PC

20100309698 - Voltage source converter for high voltage direct current power transmission: A high voltage AC/DC or DC/AC power conversion system including a voltage source converter with at least two series-connected converter valve bridges, at least two reactors, where each of the reactors is connected to one of the AC phase terminals of the at least two bridges and at least one... Agent: Venable LLP

20100309701 - Synchronous rectifying drive circuit with energy feedback for voltage doubler rectifer: A current-driven synchronous rectifying drive circuit designed for a T-type voltage doubler rectifier with an energy feedback circuit including a clamp and energy feedback circuit, a high frequency transformer, a current transducer, an energy storage capacitor, an output capacitor, a first and a second synchronous rectifier, and a first drive... Agent: Beusse Wolter Sanks Mora & Maire, P. A.

20100309702 - Dc-to-ac power inverter and methods: Embodiments of the invention relate generally to semiconductors for power generation and conversion applications, and more particularly, to devices, integrated circuits, substrates, and methods to convert direct current (“DC”) voltage signals to alternating current (“AC”) voltage signals. In some embodiments, an inverter can include a modulator configured to convert a... Agent: Kokka & Backus, PC

12/02/2010 > patent applications in patent subcategories.

20100302809 - Piezoelectric transformer driving device and image forming device: A piezoelectric transformer driving device includes a piezoelectric transformer for outputting an alternating high voltage, a switching control part configured to control the control frequency of the control signal, a reference voltage waveform generation part configured to switch between a first voltage value, a second voltage value and a third... Agent: Posz Law Group, PLC

20100302808 - Power source apparatus: A power source apparatus includes: a first alternating current line; a second alternating current line; an electric power inputting portion including a rectifying circuit for rectifying an alternating current voltage supplied from an alternating current power source, the electric power inputting portion serving to output the rectified voltage to each... Agent: Rader Fishman & Grauer PLLC

20100302810 - Voltage converters with integrated low power leaker device and associated methods: Voltage converters with integrated low power leaker device and associated methods are disclosed herein. In one embodiment, a voltage converter includes a switch configured to convert a first electrical signal into a second electrical signal different than the first electrical signal. The voltage converter also includes a controller operatively coupled... Agent: Perkins Coie LLP Patent-sea

20100302812 - Adapter power supply: The present invention relates to an adapter power supply, which includes a switching unit for switching a DC voltage; a transformer which has a primary winding connected to the switching unit, a secondary winding electromagnetically coupled to the primary winding, and an auxiliary winding electromagnetically coupled to the primary winding;... Agent: Lowe Hauptman Ham & Berner, LLP

20100302814 - Controller for switching power supply: A switching power supply has an inductor that includes a coil. A chopper circuit chops the primary current drawn through the coil, for the inductor to output an induced current. A multifunction junction of the power supply has a multifunction voltage that is a function of a primary voltage that... Agent: Perkins Coie LLP Patent-sea

20100302813 - Dual-mode constant load control circuits and associated methods: Dual-mode AC/DC power converters and associated methods of operation are disclosed herein. In one embodiment, the AC/DC converter includes a primary winding, a switching transistor coupled to the primary winding, the switching transistor configured to carry a drain-source current, and a feedback voltage port configured to carry a feedback voltage.... Agent: Perkins Coie LLP Patent-sea

20100302811 - Single-stage power supply with power factor correction and constant current output: An example controller includes first, second and third inputs, a delayed ramp generator and a drive signal generator. The first, second and third inputs are coupled to receive an input voltage sense signal, an output voltage sense signal, and an input current sense signal, respectively. The drive signal generator is... Agent: Blakely Sokoloff Taylor & Zafman LLP

20100302815 - Switching mode power supply with a multi-mode controller: A switching mode power supply with a multi-mode controller is provided. The switching mode power supply may include a transformer having a primary winding and a secondary winding to supply power to a load. A feedback circuit may be included to generate a feedback signal that varies in relation to... Agent: Perkins Coie LLP Patent-sea

20100302816 - Switching mode power supply with a spectrum shaping circuit: In accordance with the teachings described herein, systems and methods are provided for a switching mode power supply. In one example, the switching mode power supply may include a transformer, a switching circuit and a switching control circuit. The transformer receives a DC input voltage on a primary winding and... Agent: Perkins Coie LLP Patent-sea

20100302817 - Dc-dc converter: A DC-DC converter includes a plurality of switch elements connected in series between both ends of a DC power source, a series circuit of a primary winding of a transformer and a capacitor, connected between a connection point of the plurality of switch elements and an end of the DC... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100302818 - Power factor correction converter capable of fast adjusting load: A power factor correction converter capable of fast adjusting load functions to (a) convert a single-phase AC voltage into a DC voltage output; (b) control an input current and an input voltage for a correspondent electrical phase, namely the power factor that is 1; and (c) control a DC output... Agent: Sinorica, LLC

20100302819 - Solar inverter and control method: A power generation system including a photovoltaic (PV) module to generate direct current (DC) power is provided. The system includes a controller to determine a maximum power point for the power generation system and a boost converter for receiving control signals from the controller to boost the power from the... Agent: General Electric Company Global Research

20100302822 - Flyback power converters: Designs of flyback power converters are described. According to one aspect of the designs, a power converter includes a primary side including a primary winding of a transformer coupled to an input voltage and a primary switch for switching on or off the primary winding, a secondary side including a... Agent: Silicon Valley Patent Agency

20100302820 - Inverter drive power supply circuit: An inverter drive power supply circuit for driving a plurality of inverter switching devices that form an inverter circuit, includes a number N of transformers (N is an integer equal to or larger than 2) adapted to a push-pull method, each having a first winding and a second winding for... Agent: Oliff & Berridge, PLC

20100302821 - Operating resonant load circuit, dimming circuit and dimming method: An operating resonant load circuit, a dimming circuit and a dimming method are disclosed. The operating resonant load circuit includes: an input unit including a plurality of input terminals, for receiving an AC voltage; a rectifier, for transforming the AC voltage received by the input unit into a DC bus... Agent: Osram Sylvania Inc

20100302823 - Method and apparatus for electrical bus centering: A bus centering device for use in an aircraft electrical power distribution system that includes a positive bus rail, a negative bus rail, and a ground is described. The device includes a central node, a first and second switching component configured to couple the central node to the positive rail... Agent: John S. Beulick (12729) C/o Armstrong Teasdale LLP

20100302824 - Power source apparatus: Disclosed herein is a power source apparatus utilizing a synchronous rectification system, including: a main transformer; a first field effect transistor; a second field effect transistor; and a gate driver.... Agent: Rader Fishman & Grauer PLLC

20100302825 - Single-phase voltage source ac-dc power converter and three-phase voltage source ac-dc power converter: The present invention is a single-phase voltage source AC-DC power converter and a three-phase voltage source AC-DC power converter. Each of the single-phase voltage source AC-DC power converter and the three-phase voltage source AC-DC power converter includes a voltage source AC-DC power converting circuit that converts power from a DC... Agent: Ohlandt, Greeley, Ruggiero & Perle, LLP

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