Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems July category listing 07/09

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.
07/30/2009 > patent applications in patent subcategories.

20090190374 - Method for coupling a direct current power source across a nearly frictionless high-speed rotation boundary: A system and method is provided for coupling a power source across a rotation boundary. A generator converts a DC source on the stationary side of a rotation boundary to a square-wave at a determined frequency. The generator output connects through a transmission line and a first transformer to a... Agent: Naval Undersea Warfare Center Division Newport

20090190375 - Converter control device: A converter device which is configured by connecting three converter circuits in parallel is provided between a secondary battery serving as a first power supply and a fuel cell serving as a second power supply. A control unit includes a PID control module which controls the converter device by PID... Agent: Kenyon & Kenyon LLP

20090190376 - Voltage detection device and voltage detection method: A voltage detection device that is connected to a DC circuit to which a DC voltage is applied and that detects the DC voltage applied to the DC circuit comprises a voltage conversion means for outputting a first voltage that increases as the DC voltage increases and a second voltage... Agent: Foley And Lardner LLP Suite 500

20090190378 - Power supply device outputting pulsed electrical current: The power supply device of the present invention which outputs pulsed electrical current includes an inverter which converts an input voltage to high frequency AC, a rectifier which rectifies the output of the inverter and converts it to DC, and an output polarity changeover unit which, via a reactor, alternatingly... Agent: Mark D. Saralino (general) Renner, Otto, Boisselle & Sklar, LLP

20090190377 - Systems and methods for dc to dc conversion with current mode control: In one embodiment the present invention includes a DC to DC converter device which includes an electronic circuit. The electronic circuit comprises a first comparator, a second comparator, a first switch, a first latch, and a current sensor. The inductor current includes a peak current value and a valley current... Agent: Fountainhead Law Group, PC

20090190379 - Switching regulator with boosted auxiliary winding supply: A boosted auxiliary winding power supply for a switched-power converter circuit provides operating voltage for control and other circuits early in the start-up phase of converter operation. A boost circuit has an input coupled to the auxiliary winding to boost the voltage available from the auxiliary winding at least during... Agent: Mitch Harris, LLC - Cirrus

20090190380 - Multi-stage switching power supply: A multi-stage power supply uses a boost stage and an inverter stage to boost the voltage value of a DC power supply to a desired level, and then convert the power into an AC form. The multi-stage power supply additionally has a controller which can simultaneously control the boost stage... Agent: Carlson, Gaskey & Olds, P.C.

20090190381 - Method of modulating power supply conversion efficiency curve: The present invention discloses a method of modulating a power supply conversion curve. The method obtains an input power and an output power of the power supply device for a conversion efficiency curve, and obtains the best efficiency value in the conversion efficiency curve, and then obtains a total load... Agent: Joe Mckinney Muncy

20090190382 - Power factor correcting converter: A power factor correcting converter includes a rectifier to rectify an AC voltage of an AC power source into a pulsating voltage, a voltage converter having a switching element, to convert the pulsating voltage into a predetermined DC voltage with the switching element being turned on/off according to a control... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090190383 - High voltage inverter: Disclosed is a high voltage inverter for converting DC power to AC power with one or more AC output phases. The inverter has for each AC output phase an AC input phase circuit comprising first and second cold cathode field emission controllable electron tubes of triode, tetrode or pentode structure.... Agent: Bruzga & Associates

20090190384 - Powering a power supply integrated circuit with sense current: A power control system and method senses input and/or output voltages of a power supply using sense currents in order for an integrated circuit (IC) switch state controller to generate a control signal to control a switch of the power control system. By sensing sense currents, the power control system... Agent: Hamilton & Terrile, LLP

07/23/2009 > patent applications in patent subcategories.

20090185396 - Method and apparatus for a control circuit with multiple operating modes: An apparatus of regulating a power converter with multiple operating modes includes a switch coupled to an energy transfer element coupled between an input and an output of the power converter. A control circuit is also included, which is coupled to the switch to control the switch. The control circuit... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090185397 - Secondary-side amplifier with soft start: An isolated switching regulator has a closed-loop soft-start feature that allows tighter regulation of the output voltage and eliminates or reduces overshoot. It also has an optional reset feature which will resoft-start the regulator during recovery from a fault on the output voltage.... Agent: Texas Instruments Incorporated

20090185398 - Integrated magnetics switching converter with zero inductor and output ripple currents and lossless switching: Switching Converter with a novel two-loop Integrated magnetic structure integrates transformer and two output inductors and eliminates large circulating current in the transformer secondary side resulting in ultra high efficiency and zero ripple output current as well as zero ripple currents in both output inductors simultaneously. The novel lossless switching... Agent: Slobodan Cuk

20090185399 - Active start judgment circuit: An active start judgment circuit is electrically connected to an AC/DC transforming power supply which has at least one standby power unit to transform AC to DC in regular conditions and a main power unit to transform the AC to the DC in an ON condition for operation of an... Agent: Joe Mckinney Muncy

20090185400 - Parallel inverter system: A parallel inverter system needs neither a dedicated line for synchronizing common portions nor switching operations, and includes a plurality of inverter units operating in parallel. An inverter control circuit of each inverter unit includes a sinusoidal signal generating circuit, a PWM control signal generating circuit, a phase difference circuit,... Agent: Rankin, Hill & Clark LLP

20090185401 - Dc-ac converter and controller ic thereof: A semiconductor switch circuit is connected to a primary winding of a transformer having a secondary winding connected to a load. The semiconductor switch circuit has switches controlled by PWM to provide a controlled constant current. In the inventive inverter, constant current control is performed by PWM operation of the... Agent: Hogan & Hartson L.L.P.

20090185402 - standby circuit with super low power consumption: The present invention relates to a circuit minimizing standby power in a power adapter with a power-frequency transformer (T1), which includes a sensing circuitry (1), a driving circuitry (2), a switching circuitry (3) and a resistive element (Z). When the sensing circuitry (1) senses a power supply signal of the... Agent: Morris Manning Martin LLP

20090185403 - Controller for electrically adjustable furniture: A controller for electrically adjustable furniture includes a main-voltage area and a low-voltage area that are electrically isolated from one another. A rectifying power supply unit, which is located in the main-voltage area, serves to generate a rectified voltage available at power supply terminals from an alternating main voltage. The... Agent: Slater & Matsil, L.L.P.

20090185404 - Regenerative building block and diode bridge rectifier and methods: A rectifier building block has four electrodes: source, drain, gate and probe. The main current flows between the source and drain electrodes. The gate voltage controls the conductivity of a narrow channel under a MOS gate and can switch the RBB between OFF and ON states. Used in pairs, the... Agent: Law Offices Of James E. Eakin

20090185406 - Switched-capacitor circuit having two feedback capacitors: A switched-capacitor circuit performing two-phase operation with a sampling phase and an amplification phase comprising: an inverter having a common source type input transistor and a load transistor; a first capacitor whose first terminal is connected to a gate of the input transistor serving as an input of the inverter;... Agent: Cook Alex Ltd

20090185405 - Three-phase voltage source inverter system: The present invention provides a three-phase voltage source inverter system capable of obtaining a nearly sinusoidal output waveform while minimizing apparatus size increase and cost increases. The three-phase voltage source inverter system of the present invention is provided with: a three-phase inverter unit INV-M; and an auxiliary circuit 1 inserted... Agent: Foley & Lardner LLP

07/16/2009 > patent applications in patent subcategories.

20090180302 - Switching power supply apparatus and semiconductor device used in the switching power supply apparatus: A switching power supply apparatus having a highly accurate overvoltage protection function which is free of erroneous operation is provided. A regulating circuit connected to an auxiliary winding generates an AC voltage proportional to a voltage component in which the ringing component has been removed from the AC voltage induced... Agent: Steptoe & Johnson LLP

20090180303 - Voltage converter: An exemplary voltage converter includes a pulse width modulation controller chip, a pull-up transistor, a pull-down transistor, and a low pass filter. The pulse width modulation controller chip includes a plurality of pins, a gate control logic circuit, a first gate driver, a second gate driver, a current source, a... Agent: PCe Industry, Inc. Att. Steven Reiss

20090180304 - Integrated iii-nitride power converter circuit: An integrated circuit that includes a power stage and a driver stage, all stages using III-nitride power devices.... Agent: Farjami & Farjami LLP

20090180305 - Multi-parallel magnetic-field cancellation type transformer: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic... Agent: Squire, Sanders & Dempsey L.L.P.

07/09/2009 > patent applications in patent subcategories.

20090175054 - Method for operating a switched mode power supply with return of primary-side stray energy: The invention relates to a method for operating a switched mode power supply as an isolating transformer. According to said method, magnetic energy is stored in the core of a transformer during a storage stage via a primary coil that is connected to an intermediate circuit current and the stored... Agent: Siemens Corporation Intellectual Property Department

20090175055 - Power supplying device: A power supplying device includes: an output transformer including first and second output coils for generating first intermediate voltages from an input voltage; a voltage adjusting transformer including primary and secondary coils; a first rectifying-and-filtering circuit connected to the first output coil for generating a first output voltage from the... Agent: Rosenberg, Klein & Lee

20090175056 - Synchronous rectifier: This invention relates to a synchronous rectifier for LLC resonant converter. This method allows simple drive method for the synchronous rectifier MOSFETS by using the transformer secondary winding voltage and one-shot vibrator. The synchronous rectifier MOSFETs are turned on by being triggered to the transformer secondary side winding voltage and... Agent: Sidley Austin LLP

20090175057 - Isolated voltage converter with feedback on the primary winding, and corresponding method for controlling the output voltage: An embodiment of a voltage converter includes: voltage-transformer means having a primary side, designed to receive an input voltage, and a secondary side, designed to supply an output voltage; control-switch means coupled to said primary side; and a control circuit, coupled to a control terminal of said control-switch means and... Agent: Graybeal Jackson LLP

20090175058 - Method and apparatus for a power supply controller responsive to a feedforward signal: An apparatus and method of switching a switch of a power supply in response to an input voltage signal are disclosed. According to aspects of the present invention, a power supply controller includes a switch duty cycle controller coupled to receive a feedback signal and a duty cycle adjust signal.... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090175059 - Power converter apparatus and power converter apparatus control method: A converter section converts a three-phase ac input voltage into a dc voltage, and an inverter section converts the dc voltage converted by the converter section into a prescribed three-phase ac output voltage. The converter section converts the three-phase ac input voltage into the dc voltage on the basis of... Agent: GlobalIPCounselors, LLP

20090175060 - Power transmission control device, non-contact power transmission system, power transmitting device, electronic instrument, and waveform monitor circuit: A power transmission control device includes a power-transmitting-side control circuit that controls an operation of a power transmitting device, a driver control circuit that controls operations of a first power transmitting driver and a second power transmitting driver, and a waveform detection circuit that performs a waveform detection process based... Agent: Oliff & Berridge, PLC

20090175061 - Instantaneous load current control scheme for voltage fed dc to ac inverter supplying resistive-inductive load: A control system is provided for controlling varying alternating current (AC) to a load with varying resistance and inductance. A plurality of nested control loops may employ cascaded proportional controllers to provide desired control of a pulse width modulation (PWM) block to control an inverter that supplies AC power to... Agent: Honeywell International Inc.

07/02/2009 > patent applications in patent subcategories.

20090168460 - Apparatus for controlling h-bridge dc-ac inverter: The present invention discloses an apparatus for controlling an H-bridge DC-AC inverter, comprising an H-bridge DC-DC converting circuit capable of converting unstable DC power into stable DC power and a full-bridge DC-AC inverting circuit capable of inverting DC power output from the H-bridge DC-DC converting circuit into AC power. The... Agent: Wpat, PC

20090168461 - Switching power supply unit: A switching power supply unit is provided, which may supply stable output while manufacturing cost is held down. In a smoothing circuit, a magnetic flux in a first circular magnetic path, a magnetic flux in a second circular magnetic path, a magnetic flux generated by a current flowing through a... Agent: Oliff & Berridge, PLC

20090168462 - Circuit device and method of providing feedback across an isolation barrier: In an embodiment, a circuit device includes a network interface responsive to a powered network to receive a power supply and data and includes an electrical isolation barrier adapted to define a non-isolated power domain and an isolated power domain. The circuit device further includes a first control circuit associated... Agent: Westman Champlin & Kelly, P.A.

20090168463 - Dc to dc converter: An exemplary DC to DC converter includes a first transistor, a second transistor, a transformer, and a pulse generating circuit having a first capacitor, a sampling resistor, a zener diode, and a first diode. A DC voltage input terminal is configured for receiving a first DC voltage and is grounded... Agent: Wei Te Chung Foxconn International, Inc.

20090168464 - Synchronous rectifier control device and a forward synchronous rectifier circuit: A synchronous rectifier control device comprises a status detecting unit, an analog circuit, a first counter, a second counter and a signal process unit. The status detecting unit receives at least one reference signal and a detecting signal to generate a first synchronous control signal. The analog circuit generates a... Agent: Rosenberg, Klein & Lee

20090168465 - Power supply circuit with protecting circuit: A power supply circuit includes a direct current (DC) voltage source, a protecting circuit having a first switching element, a pulse width modulation (PWM) circuit having a first terminal, a switching circuit, and a transformer. The DC voltage source is configured to provide a first DC voltage. The first terminal... Agent: Wei Te Chung Foxconn International, Inc.

20090168466 - Half bridge converter: A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electricity to a working voltage level for... Agent: Joe Mckinney Muncy

20090168467 - Circuit arrangement having a dual coil for producing an alternating voltage or an alternating current: The invention relates to a circuit arrangement for producing an alternating voltage or an alternating current from a unipolar direct current source having an inverter relating to a neutral conductor. The direct current source is connected to an inverter which converts the unipolar voltage of the direct current source into... Agent: Millen, White, Zelano & Branigan, P.C.

20090168468 - converter station: A converter station for connecting an AC system to a bipolar HVDC transmission line. A DC neutral arrangement is provided with first DC breakers enabling breaking of a first current path from a neutral bus of one pole of the transmission line to a neutral bus of another pole at... Agent: Venable LLP

20090168469 - Apparatus, system, and method for a low cost fault-tolerant power supply: An apparatus, system, and method are disclosed for a low cost fault-tolerant power supply. The invention includes a power supply that regulates a bus voltage under varying load conditions. The power supply includes at least one pulse-width modulated stage, where each pulse-width modulated stage includes at least two DC-to-DC converters... Agent: Kunzler & Associates

20090168470 - Fault-sensing and protecting apparatus for soft start circuit of inverter and method for the same: Fault-sensing and protecting apparatus for soft start circuit of inverter and method for the same are proposed. The soft start circuit of inverter includes a soft-starting resistor and a relay. The relay has a normally-open end connected to the soft-starting resistor in parallel. The fault-sensing and protecting apparatus for soft... Agent: Hdls Patent & Trademark Services

20090168471 - Circuit device having a free wheeling diode, circuit device and power converter using diodes: A circuit device includes at least one switching element and a free wheeling diode connected in parallel to the switching element. The free wheeling diode is made up of a Schottky barrier diode using a semiconductor material having a band gap larger than silicon as its base material and also... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090168472 - Apparatus, system, and method for a low cost self-healing power supply: The power supply also includes a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value. The pulse-width modulator for... Agent: Kunzler & Associates

20090168473 - Converter station: A converter station for connecting an AC system to an HVDC transmission line. At least two converters are arranged in two separate converter valve halls. The station includes a separate control device configured to control of each converter and an auxiliary power source configured to provide auxiliary power for each... Agent: Venable LLP

20090168474 - Power converting device and method for controlling the same: In a system to which a fluctuating load is connected, compensating for fluctuation in voltage harmonics at the load connecting point and fluctuation in system current harmonics has been difficult for a power converting device connected in parallel with the load. To resolve the problem, a power converting device connected... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090168475 - Converter power supply circuit and converter power supply driving method: A converter power supply circuit 100 includes SW_Q1 and SW_Q2 which switch a voltage inputted from an alternating power supply 101 via a full-wave rectifier 102 and a low-pass filter 103, by drive signals applied thereto and generate an output signal; an output current detecting unit 114 which detects a... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090168476 - Bridgeless power factor correction circuit: There is provided a bridgeless power factor correction circuit that corrects a power factor by complementarily switching two switches according to phase of input power without using rectifier bridge diodes. A bridgeless power factor correction circuit according to an aspect of the invention may include: a switching unit having a... Agent: Lowe Hauptman Ham & Berner, LLP

20090168477 - Power switching system to increase induction heating to a load from available ac mains power: In one aspect, the invention provides a power system for providing power to a load. In some embodiment, the system comprises: a rectifier configured to rectify an AC main signal to produce a rectified AC main signal; a zero cross detector configured to receive the AC main signal and to... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

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