Electric power conversion systems inventions 10/07

20070247877 - Active-clamp current-source push-pull dc-dc converter: Provided is a current-source push-pull DC-DC converter using an active clamp circuit for reusing energy of leakage inductances by not only diodes on a secondary side of a transformer being zero-current switched using a series-resonant full-wave rectifier, but also the active clamp circuit on a primary side of the transformer,... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20070247880 - Full-bridge active clamp dc-dc converter: Provided is a full-bridge active clamp DC-DC converter for reducing power loss due to high-speed switching by primary switches that are zero-voltage switched by energy stored as a leakage inductance of a transformer when main switches are on or off using a full-bridge active clamp circuit, which can be used... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20070247881 - Power control apparatus and method: A power control apparatus and power control method that reduce harmonic noise produced when modulating a carrier wave frequency over predetermined cycles. A command value signal is generated for obtaining a desired output voltage, and a carrier wave is output. The frequency of the carrier wave is modulated by a... Agent: Young & Basile, P.C.

20070247882 - Multi-output dc-dc converter with improved cross-regulation performance: A multi-output DC-DC converter that can optimize its cross-regulation performance is proposed, in which a nonlinear inductive element functioning as a leakage inductance of an output coupled inductor is placed on the output channel of at least one secondary circuit coupled to a secondary winding of a transformer. The inductance... Agent: Madson & Austin Gateway Tower West

20070247875 - Multiple-output voltage converter: The present invention relates to a multiple-output voltage converter. A basic idea of the present invention is to provide a multiple-output converter which may be adapted to various output power conditions. The converter has, in an exemplifying embodiment, three outputs which all share a common tapped inductor (301, 302). An... Agent: Philips Intellectual Property & Standards

20070247876 - Output power factor control of pulse-width modulated inverter: An inverter operable to supply high power factor electrical power to an AC load including an AC power grid includes a DC bus and a DC to AC converter section of the full bridge type. The inverter further includes a voltage sensor configured to produce an instantaneous output voltage signal... Agent: Ralph A. Dowell Of Dowell & Dowell P.C.

20070247878 - \"low loss propulsion system\": This invention relates to low loss power supply system comprising a rectifying bridge 3 supplying current to a motor, wherein the rectifying bridge including two AC power feed inputs PA, PB as well as at least one output for supplying power to said motor M, and wherein an YD transformer... Agent: Sierra Patent Group, Ltd.

20070247879 - Start-up circuit with feedforward compensation for power converters: A bleeding resistor is required to discharge EMI filter of the power converter for the safety purpose. In order to save power and reduce device count, the present invention further uses this bleeding resistor for both start-up and feedforward compensation. It includes an input terminal for connecting the bleeding resistor.... Agent: Rosenberg, Klein & Lee

20070247883 - Wireless charging system with feedback loop: A wireless charging system with a feedback loop which includes on the supply side a high-frequency generator, whose input is connected to the controlling output of a controller, and whose output is connected to the first input of a modulator whose input is connected to an antenna and to the... Agent: Tung & Associates

20070242489 - Method of designing an rpwm inverter with unwanted harmonic elimination: A method of designing a random pulse width modulation (RPWM) inverter with unwanted harmonic elimination, which first uses a Fourier analysis and a numerical analysis to eliminate the unwanted harmonic components, next uses the equal area approach to produce switching angles to be used as start values for solving non-linear... Agent: Bacon & Thomas, PLLC

20070242486 - Synchronous rectification forward converter: A rectification switch control switch element (Q7) is provided between a gate and a source of a rectification switch element (Q2). The rectification switch control switch element (Q7) is turned ON in response to a signal on a secondary side of a pulse transformer (T2) at a turn OFF timing... Agent: Ostrolenk Faber Gerb & Soffen

20070242487 - Dc converters: A DC converter comprises a half bridge supply circuit and one or more flyback or forward converter output circuits, and optionally also an LLC converter whose control can determine a common variable switching frequency. The half bridge supply circuit produces a 50% duty output alternating between two input voltages, such... Agent: Smart & Biggar P.o. Box 2999, Station D

20070242488 - Method and apparatus for conditional response to a fault condition in a switching power supply: Techniques are disclosed to regulate an output of a power converter. One example power converter controller circuit includes a line sense input to be coupled to receive a signal representative of an input voltage of a power converter. A feedback input is included and is to be coupled to receive... Agent: Blakely Sokoloff Taylor & Zafman

20070242490 - Method and device for producing rectifier gating signals using a peak detector: A device that includes an active rectifier (14) having control gates controllable to produce an output voltage on a DC bus (20), a gate control circuit (16) for producing gate control signals for controlling the active rectifier control gates, a first circuit (18) connected to the gate control circuit (16)... Agent: Honeywell International Inc.

20070242491 - Process for determining the loading condition of a diode rectifier of a frequency converter: A process is disclosed for determining the charging state of a diode rectifier (4) of a frequency converter (2) connected to a supply grid (18). According to the invention, a rectifier current (iZKnetz) is determined on the basis of a measured intermediate circuit voltage (UZK) and of measured motor currents... Agent: Henry M Feiereisen, LLC

20070242492 - Pulse generator circuit: A pulse generator circuit comprises a DC power supply (power supply voltage=V); a transformer series connected across the DC power supply; and a single switch; wherein an output is derived from the two ends of a secondary winding of the transformer. While the switch is on-state, a pulse of negative... Agent: Oliff & Berridge, PLC

20070236964 - Method for operating a traction converter circuit for coupling to an electric dc voltage network: A method for operating a traction converter circuit for coupling to an electric DC voltage network is stated, where the traction converter circuit comprises a network converter, which network converter on the DC voltage side is connected with a DC voltage circuit, wherein the DC voltage circuit can be switched... Agent: Buchanan, Ingersoll & Rooney PC

20070236966 - Uniderectional dc-dc converter: A unidirectional DC-DC converter equipped with main IGBT101 which supplies and shuts off current for first inductor 108a and diode 107 which discharges energy from main inductor 108a to an output, wherein the DC-DC converter is further equipped with auxiliary IGBT104 which applies current to back-to-back-connected diode 102 by using... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070236968 - Power supply with ripple attenuator: A power supply configured for converting an input AC voltage into an output DC voltage having a desired voltage level is provided. The power supply includes a front-end power converter such as a PFC converter which is configured to convert the input AC voltage into an intermediate DC voltage generated... Agent: Madson & Austin Gateway Tower West

20070236972 - Semiconductor integrated circuit device, charge pump circuit, and electric appliance: In addition to an input terminal, an output terminal, a ground terminal, a plurality of external terminals, and a plurality of charge transfer switches, a semiconductor integrated circuit device has a step-up factor switching terminal. Here, the plurality of charge transfer switches each have a common contact connected to corresponding... Agent: Fish & Richardson P.C.

20070236974 - Amplification apparatus: A switching regulator raises power from a USB terminal to 100 V, and performs the charging of an electrolytic capacitor. After the charging has been completed, a switching regulator drops the voltage to 5 V, and supplies the power to an amplifier. When the power consumed by the amplifier exceeds... Agent: Crowell & Moring LLP Intellectual Property Group

20070236962 - Method and circuit arrangement for optimising maximum current limitation in the primary switch of a switched mode power supply, and a power supply: A power supply converts an input voltage to an output voltage. A primary cur-rent path comprises a primary coil (105, 601), a primary switch (104, T1) and a resistive path portion (109, 301, 302, 401, 402, 501, R4, T3, R15). A pulse forming circuit (108) is adapted to deliver switching... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20070236963 - Switching power supply circuit: There is provided a switching power supply circuit which may include a rectifying and smoothing section for converting an alternating input voltage from an alternating-current power supply into a primary side direct-current voltage; a converter section for converting the primary side direct-current voltage from the rectifying and smoothing section into... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20070236965 - Dc-to-dc converter and electric motor drive system using the same: A DC-to-DC converter and to an electric motor drive system using the same. The DC-to-DC converter includes first and second capacitors, an inductor, and first and second switching devices.... Agent: Brooks Kushman P.C./fgtl

20070236967 - Full-resonant power circuit device for receiving a variable input voltage: The present invention provides a full-resonant power circuit device for receiving a variable input voltage that a power factor correcting circuit for separating a variable input voltage AC into a plurality of supply voltages, and the input voltage sections are detected to separately switch corresponding switch transistors for suitably adding... Agent: Rosenberg, Klein & Lee

20070236969 - Aircraft power convertor with improved voltage output characteristics: A multi-phase AC-DC aircraft power converter having an input filter, power transformer, rectifier, output filter, and dummy load that provides improved voltage regulation across a range of output current loads. The transformer includes a primary and a pair of secondary windings. The input filter receives multi-phase AC input power and... Agent: James D. Stevens Reising, Ethington, Barnes, Kisselle, P.C.

20070236970 - High voltage start up circuit for power converters: A start up circuit for power converters is presented. It includes a JFET transistor, a resistive device, a first transistor, a second transistor and a diode. The JFET transistor is coupled to a voltage source. The first transistor is connected in serial with the JFET transistor to output a supply... Agent: Rosenberg, Klein & Lee

20070236971 - Reverse current preventing circuit with an automatic correction of reference: A synchronous switching voltage converter has a first switch, a second switch, and an inductor, coupled together to a switch node. A reverse current preventing circuit has a fixed reference current source, a correcting circuit, a variable reference current generating circuit, and a comparing circuit. Based on a comparison between... Agent: North America Intellectual Property Corporation

20070236973 - Gradient non-linear adaptive power architecture and scheme: Techniques related to a power module employing multiple power sub-modules are described. More specifically, an embodiment combines and controls multiple power sub-modules of varying characteristics to improve the overall efficiency of the power module across varying load currents, power outputs, input voltages, and other operating conditions. Moreover, the power module... Agent: Kacvinsky LLC C/o Intellevate

20070236975 - Method and apparatus for balancing energy between portable devices: A method comprises the steps of determining values of one or more parameters of a first energy reservoir in a first device and corresponding parameters of a second energy reservoir in a second device, and setting a direction for transferring energy between the first energy reservoir and the second energy... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20070236976 - Open loop single output high efficiency ac-dc regulated power supply: Disclosed is a circuit design and method for providing an open loop, single-output, high efficiency AC-DC regulated power supply. The circuit is designed with two boost stages (or a two-stage boost) coupled to a zero-voltage switched (ZVS) synchronous rectifier. The first boost stage comprises an inductive switching component coupled to... Agent: Dillon & Yudell LLP

20070236977 - Switching voltage regulator control device: A switching voltage regulator control device, includes first and second half-bridges each comprising a switch. The first half-bridge is located between an input voltage and a reference voltage and the second half-bridge is located between an output voltage and the reference voltage. The regulator comprises a detector for detecting the... Agent: Seed Intellectual Property Law Group PLLC

20070230220 - Current source inverter with energy clamp circuit and controlling method thereof having relatively better effectiveness: The provided current source inverter includes a buck converter having an input capacitor and an output inductor, receiving a DC input voltage, and generating an output inductor current, a DC/AC converter having an output capacitor, receiving the output inductor current and generating an AC output voltage, a load coupled to... Agent: Volpe And Koenig, P.C.

20070230224 - Load control device and method: A load control device includes a control circuit and a protection circuit. The control circuit controls driving of an electric load. The protection circuit monitors a power supply voltage supplied to the control circuit and stops control of driving the load by the control circuit, when the power supply voltage... Agent: Posz Law Group, PLC

20070230225 - Distributed power supply and method of recovering from error: A distributed power supply is incorporated in a device including a plurality of PCB. An on-board power supply is provided in the distributed power supply. The on-board power supply individually supplies a secondary power to each PCB using a primary power. Each PCB includes a primary power supply monitoring circuit,... Agent: Staas & Halsey LLP

20070230221 - Method and apparatus for three-dimensional integration of embedded power module: A modified planar Low Temperature Co-Fired Ceramic (LTCC) high conductance inductor, embedding a large cross section conductor, supports a stacked arrangement of heat spreader, inductor and active device layers. Interlayer electrical connections connect the layers. Optionally, a DC-DC converter includes the modified planar LTCC high conductance inductor, embedding a large... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20070230222 - Power circuitry for high-frequency applications: The present the invention provides power circuitry for the charging and discharging of high-frequency devices.... Agent: Levine Bagade Han LLP

20070230223 - Electric power converter: By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced, thus cost reduction and conversion efficiency... Agent: Crowell & Moring LLP Intellectual Property Group

20070230226 - Multilevel intelligent universal auto-transformer: A power conversion device includes a first switched converter circuit coupled to a device input and a second switched converter circuit coupled to the first switched converter circuit and a device output. The first switched converter circuit and the second switched converter circuit may be configurable for multi-level step-up and/or... Agent: Kilpatrick Stockton LLP

20070230227 - Universal power adapter: A power adapter device and a power delivery system are disclosed herein. The power adapter device includes an input terminal at which the device receives input power having an input power characteristic, and an output terminal at which the device provides output power having an output power characteristic, where the... Agent: Whyte Hirschboeck Dudek S C

20070230228 - Zero-voltage-switching dc-dc converters with synchronous rectifiers: A DC-DC converter includes an inductor, a synchronous rectifier (SR) connected to the inductor, and an active switch connected to the inductor and the SR. An active resonant tank (ART) cell is connected to the SR or a transformer in parallel such that a resonant capacitor of the ART cell... Agent: Harness, Dickey, & Pierce, P.l.c