Electric power conversion systems inventions 11/08

20080291698 - Control method and controller for pwm cyclo-converter: In the PWM cyclo-converter, the turning on and off operations of two-way semiconductor switch are repeated at intervals of short time. As switching patterns, within the intervals of short time, a first terminal of output side terminals outputs in order a maximum potential phase P, an intermediate potential phase M... Agent: Sughrue-265550

20080291699 - Low-loss rectifier with optically coupled gate shunting: A rectifier circuit (400) is provided. The rectifier circuit is comprised of a plurality of field effect transistors (102, 104, 106, 108) coupled together to define a rectifier circuit. The rectifier circuit is also comprised of a control circuit (800) and a switching device (420, 430, 440, 450). The switching... Agent: Harris Corporation C/o Darby & Darby PC

20080291702 - Switching power supply apparatus: In a switching power supply apparatus, an inductor, a transformer, a first switching circuit, a second switching circuit, and a capacitor are connected to each other so that a first switching element and a second switching element can be alternately turned on and off, an output can be obtained from... Agent: Murata Manufacturing Company, Ltd. C/o Keating & Bennett, LLP

20080291701 - Power converter for compensating maximum output power and pwm controller for the same: A PWM controller compensates a maximum output power of a power converter, and includes a PWM unit and a compensation circuit. The PWM unit generates a PWM signal for controlling a power switch to switch a power transformer, which has a primary winding connected to the power switch and is... Agent: Law Offices Of Mikio Ishimaru

20080291700 - Power converter having pwm controller for maximum output power compensation: A PWM controller compensates a maximum output power of a power converter having a power switch. The PWM controller includes an oscillator for generating a saw signal and a pulse signal, a power limiter coupled to the oscillator for generating a saw-limited signal in response to the saw signal, and... Agent: Law Offices Of Mikio Ishimaru

20080291703 - Signal converting apparatus and signal conversion method: A signal converting apparatus is disclosed and includes a swing range converting unit converting an error signal swinging in a first swing range to an adjusted error signal swinging in a second swing range, an oscillator generating a periodic oscillation signal swinging in approximately the second swing range, and a... Agent: Volentine & Whitt PLLC

20080291704 - Driving device and method for providing an ac driving signal to a load: In a driving device and method for providing an AC driving signal to a load, a first voltage converting unit converts an external AC voltage signal into a DC voltage signal using pulse width modulation in response to a feedback signal that is generated by a summing unit based on... Agent: Ladas & Parry LLP

20080291705 - Method for regulating a voltage or a current of an rlc filter, a recording medium and vehicles for this method:

20080291706 - Common mode filter system and method for a solar power inverter: A photovoltaic system, method and apparatus are disclosed. In an exemplary embodiment, the system includes a photovoltaic array, a distribution system that distributes power within a premises of a demand-side energy consumer, an inverter coupled to the distribution system that is configured to convert DC power from the photovoltaic array... Agent: Neugeboren O''dowd PC

20080291707 - Universal ac high power inveter with galvanic isolation for linear and non-linear loads: A universal alternating current (AC) inverter system with galvanic isolation takes an unregulated direct current (DC) input and provides a high-quality AC output that may be used in conjunction with both linear and non-linear loads. The universal AC inverter system includes a DC-DC converter for converting an unregulated DC input... Agent: Kinney & Lange, P.A.

20080291708 - Protective circuit and method for multi-level converter: A protective circuit for a multi-level converter including a DC link capacitor bank includes: an energy absorbing element; switches, wherein at least two of the switches each couple the energy absorbing element to the capacitor bank; and a controller configured to provide control signals to the switches to selectively actuate... Agent: General Electric Company Global Research

20080291709 - Switching power supply apparatus: A switching power supply apparatus 10 controls a main switching element Q1 by a control circuit 12 so that a direct-current voltage obtained by rectifying an input alternating-current voltage is stabilized and outputted as a target direct current output. A starting current of the control circuit 12 is obtained via... Agent: Birch Stewart Kolasch & Birch

20080291710 - Semiconductor module and inverter device: A semiconductor module includes a base plate; a plurality of substrates placed on one surface of the base plate, with each substrate of the plurality of substrates including a switching element, a diode element, and a connection terminal area; and a parallel flow forming device that forms parallel coolant flow... Agent: Oliff & Berridge, PLC

20080291711 - Step-down switching regulator with freewheeling diode: A freewheeling DC/DC step-down converter includes a high-side MOSFET, an inductor and an output capacitor connected between the input voltage and ground. A freewheeling clamp, which includes a freewheeling MOSFET and diode, is connected across the inductor. When the high-side MOSFET is turned off, a current circulates through the inductor... Agent: Patentability Associates

20080291712 - Interleaved soft switching bridge power converter: An interleaved soft switching bridge power converter comprises switching poles operated in an interleaved manner so as to substantially reduce turn-on switching losses and diode reverse-recovery losses in the switching pole elements. Switching poles are arranged into bridge circuits that are operated so as to provide a desired voltage, current... Agent: Neugeboren O''dowd PC

20080285311 - Dc-dc converter: In a DC-DC converter of the present invention, a converting circuit converts a DC-DC voltage outputted from a DC power supply into an AC voltage, and to output to a series circuit in which a primary winding of a first transformer, a first reactor, and a current resonance capacitor are... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080285312 - Phase compensation driving scheme for synchronous rectifiers: Phase compensation of a voltage appearing on physical terminals of a synchronous rectifier switching element such as a MOSFET is used to substantially eliminate effects of package inductance of the synchronous rectifier and thus approximate the actual voltage across the circuit element providing synchronous rectification in, for example, a switching... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20080285313 - Methods and apparatus to control a digital power supply: Methods and apparatus to control a digital power supply are disclosed. An example method includes controlling a power factor controller by: receiving a first current signal flowing in a first stage of the power factor controller, receiving a second current signal flowing in a second stage of the power factor... Agent: Texas Instruments Incorporated

20080285314 - Advanced matrix converter and method for operation: A matrix converter may be provided with AC switches that comprise bi-directional sets of semiconductor switches that are gated with a common gating link. A low loss diode-bridge based snubber may facilitate introduction of time delay between sequential operations of the bi-directional set of semiconductor switches. The matrix converter may... Agent: Honeywell International Inc.

20080285315 - Power supply apparatus and electronic device having the power supply apparatus: A power supply to improve an EMI characteristic and an electronic device having the power supply. The power supply includes a power converter to convert an alternating current (AC) power applied from outside to a direct current (DC) power, a ground portion to supply a ground power to the power... Agent: Stanzione & Kim, LLP

20080285316 - Ac/dc converter and ac/dc conversion method using the same: Disclosed herein are an AC/DC converter which is simple in circuit configuration, generates little ElectroMagnetic Interference (EMI) and has no transformer so that it can be reduced in weight and size and improved in AC/DC conversion efficiency, and an AC/DC conversion method using the same. The AC/DC converter includes a... Agent: Workman Nydegger

20080285317 - Photovoltaic module-mounted ac inverter: A photovoltaic module-mounted AC inverter circuit uses one or more integrated circuits, several power transistors configured as switches, several solid-dielectric capacitors for filtering and energy storage, several inductors for power conversion and ancillary components to support the above elements in operation. The integrated circuit includes all monitoring, control and communications... Agent: Hogan & Hartson LLP

20080285318 - Power factor correction circuit: p

20080285319 - Method and apparatus achieving a high power factor with a flyback transformer: Common household power transformers (e.g., “wall warts”) typically exhibit poor power factors, which, in turn, cause energy losses to power grids and adversely affect current waveforms in the power grids. AC-to-DC power conversion with good power factor is achieved using a transformer, power switch coupled in series with the primary... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20080285320 - Alternating electric current generating process: This is a process to generate alternating current without an external source for cell-houses in electrowinning or electrorefining of copper or other products in which the electric source consists of a conventional rectifier-transformer group that supplies continuous electrical current to the cell-house, which is connected in parallel to a device... Agent: Husch Blackwell Sanders, LLP Welsh & Katz

20080285321 - Dc-ac converter and method of supplying ac power: A dc-ac converter capable of supplying a finely regulated ac drive voltage to a load is provided. For this purpose, the converter includes, in a primary winding of a transformer, a full-bridge or half-bridge type semiconductor switch circuit whose switches can be controlled by pulse-width modulation. Transformer has a secondary... Agent: Hogan & Hartson L.L.P.

20080278967 - Ac to dc power converter for aerospace applications: Three coils, each having several serial windings, have selected windings connected in a delta. Input AC power is applied through outrigger windings at the delta apices. At least two strategically located, direct tap, natural output points are provided at each side of the delta. For 6-phase output, only the six... Agent: Christensen, O'connor, Johnson, Kindness, PLLC

20080278968 - Integral stack columns: Systems and methods for power conversion are illustrated. Power conversion architecture for fuel cell systems in particular are described that use dual bus architectures having stack segment pairs and a center-tapped neutral line, and/or an architecture employing integer multiple of three DC/DC converter branches.... Agent: Foley And Lardner LLP Suite 500

20080278969 - Device and method for equalizing charges of series-connected energy stores: A device and method for equalizing the charges of series-connected individual cells of an energy storage device with a DC/DC converter, which draws energy from the energy storage device or from another energy source, charges an intermediate circuit capacitor whose voltage is inverted in a DC/AC converter, converts the alternating... Agent: Lerner Greenberg Stemer LLP

20080278970 - In-body information acquiring apparatus and power-supply circuit: An in-body information acquiring apparatus includes a function executing unit that realizes a predetermined function inside a body of a patient. A power-supply circuit includes a power unit that includes a cell and that outputs a first current and a first voltage; and a converter that converts the first current... Agent: Scully Scott Murphy & Presser, PC

20080278971 - Forward-forward converter: A forward-forward converter (FFC) and method of operation thereof. The FFC has a first transformer, including a primary winding coupled to power and clamp switches and a secondary winding coupled to the primary winding, configured to provide an output energy transfer of the forward-forward converter during conduction of the power... Agent: Anatoliy Polikarpov

20080278972 - Power conversion circuit, driving method and drive unit therefor: A power conversion circuit capable of varying an output voltage within a range from a negative voltage lower than a ground voltage to a positive voltage higher than a supply voltage, and a driving method and a drive unit are provided. A power conversion circuit includes a transformer with a... Agent: Posz Law Group, PLC

20080278973 - Apparatus and method for providing multiple functions and protections for a power converter: A power converter has a transformer including a primary winding connected between a power input and a power switch, the power switch is switched to deliver power from the power input to a power output, an auxiliary winding provides an induced voltage in such a manner that when the power... Agent: Rosenberg, Klein & Lee

20080278974 - Quasi-resonant fly-back converter without auxiliary winding: Disclosed is a switching converter without an auxiliary winding. The switching converter has a transformer, a switching transistor, a coupling circuit and a regulating circuit. The transformer has a primary winding and a secondary winding, and is for transforming an input voltage into an output voltage; a first end of... Agent: North America Intellectual Property Corporation

20080278975 - Switched mode power converter and method of operation thereof: The invention relates to a switched mode power converter and a method of operating such a converter A switched mode power converter according to the invention includes a transformer (2) having a primary winding (2a) and at least one secondary winding (2b) and a secondary side rectifier circuit including an... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080278976 - Dynamic voltage sag correction: A voltage sag correction device includes an input terminal adapted to receive a first operating signal having a line-to-neutral voltage. The first operating signal is provided to a load through an output terminal. A regulator module includes a rectifying device adapted to rectify a line-to-line input signal, a storage unit... Agent: Foley & Lardner LLP

20080278977 - Method for operating a converter circuit, and device for carrying out the method: A method for operating a converter circuit is specified with the converter circuit having a converter unit with a multiplicity of controllable power semiconductor switches and having an energy storage circuit formed by two series-connected capacitors, in which the controllable power semiconductor switches are controlled by means of a control... Agent: Buchanan, Ingersoll & Rooney PC

20080278978 - High voltage inductive charge pump dc-to-dc converter assembly: A method and apparatus for a power converter assembly charges a first capacitor and a second capacitor in parallel to a first voltage and at a first polarity, and then discharges the first capacitor and second capacitor in series at an output voltage that is greater than the input voltage... Agent: Carlson, Gaskey & Olds, P.C.

20080278979 - N-buck cascade converter with single active switch: An n-buck cascade converter, where the DC conversion ratio is Un where U is the duty ratio. The converter comprises n inductors, n capacitors, (2n-1) diodes and a MOSFET transistor. The cascading configuration uses the minimum number of active switches while avoiding complex control circuitry. It is assumed that this... Agent: Robert P. Simpson Simpson & Simpson, PLLC

20080278980 - Dc-ac converter with fast response speed: An exemplary direct current to alternating current converter includes a pulse width modulator having a plurality of pulse signal outputs that can provide a plurality of pulse signals, a driving circuit having a plurality of switching units, and a transformation circuit having a plurality of transformers. Each of the switching... Agent: Wei Te Chung Foxconn International, Inc.

20080278981 - Switching control device: The present invention reduces switching noise generated in a switching control device having a switching element such as a switching power supply in linear linkage with the state of a load of the output and without increasing the control circuit scale which is a factor of cost increase. The present... Agent: Steptoe & Johnson LLP

20080278982 - Power factor correction boost circuit: The invention relates to a power factor controller for use in a power factor correction circuit. The power factor controller comprises a first input (VinSense) for receiving an input voltage (Vin) of the power factor correction circuit, a second input (VoSense) for receiving an output voltage (Vout) of the power... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080278984 - Automatic zero voltage switching mode controller: A switching DC to AC power converter includes an automatic zero voltage switching (ZVS) mode controller. The automatic zero voltage switching mode controller may adjust a ZVS dead-time in accordance with a range of load currents being supplied by the power converter that range from quiescent conditions to a predetermined... Agent: Indianapolis Office 27879 Brinks Hofer Gilson & Lione

20080278983 - Controlling apparatus of a power converter of single-phase current for photovoltaic generation system: A control apparatus of a single-phase power converter for a photovoltaic power generation system is disclosed, including a POS MPPT controller for calculating a rating current by applying a POS MPPT control method to an output current detected through a current transformer of a single-phase AC filter, a bandpass filter... Agent: Greenblum & Bernstein, P.L.C

20080278985 - Bi-directional hemt/gan half-bridge circuit: A half-bridge circuit in accordance with an embodiment of the present application includes an input voltage terminal operable to receive an input voltage, a first bi-directional switch, a second bi-directional switch connected in series with the first bi-directional switch, wherein the first and second bi-directional switches are connected to the... Agent: Ostrolenk Faber Gerb & Soffen

20080273353 - Device for supplying electrical power to a fuel pump of a motor vehicle internal combustion engine: A device (1) for supplying electric current to the fuel pump (2) of a motor vehicle internal combustion engine (3) comprises a DC/DC converter (13) which increases voltage to a predetermined value in the event of a voltage drop of a direct current source (7). This ensures an adequate voltage... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20080273354 - Power supply: The inductive load current control circuit includes first and second switch elements connected in series between an input voltage and a ground potential, an inductive load connected to a connection point between the first and second switch elements, a third switch element having one terminal connected to the connection point... Agent: Ratnerprestia

20080273355 - Dual output programmable power supply: A dual output programmable power supply is disclosed. The dual output programmable power supply includes an AC input train including an active power factor correction circuit, a half-bridge square wave driver coupled to the AC input train through a boot strap circuit, and a pair of primary side transistors coupled... Agent: Douglas E. Mackenzie

20080273356 - Switching power converter with efficient switching control signal period generation: A power control system includes a switching power converter and a controller, and the controller responds to a time-varying voltage source signal by generating a switch control signal having a period that varies in accordance with at least one of the following: (i) the period of the switch control signal... Agent: Hamilton & Terrile, LLP

20080273357 - Semiconductor device: To provide a semiconductor device of which a manufacturing process is simplified and which has a boosting circuit in which the area of a capacitor element is reduced. The present invention includes a plurality of rectifying elements which is connected in series and has a rectifying function from a first... Agent: Fish & Richardson P.C.

20080273358 - Power supply device: A power supply device includes a first switching element, a second switching element, a transformer having a primary coil, a low-pass filter including an input port connected to the secondary coil, an output terminal connected to an output port of the low-pass filter, a detector for outputting a voltage that... Agent: Ratnerprestia

20080273359 - Synchronous rectification control circuit: The present invention discloses a synchronous rectification control circuit, comprising at least one switch unit, a pulse width control unit, a transformer, a first rectification unit, a second rectification unit, a plurality of driving units, a logic operation unit and a signal transmission unit. The logic operation unit is used... Agent: Joe Mckinney Muncy

20080273360 - Inverter device and vehicle air conditioner using the same: The inverter device contains three sets of series circuit formed by connecting two switching elements (2) in series between a positive terminal and a negative terminal of DC power supply (1). Connecting points of the two switching elements are connected to motor (11). DC voltage of DC power supply (1)... Agent: Ratnerprestia