Electric power conversion systems inventions 06/07

20070147098 - Power converting apparatus: A power converting apparatus used as an active filter includes single-phase multiplex inverter unit for converting DC power into AC power and a control unit for controlling the single-phase multiplex inverter unit. The single-phase multiplex inverter unit includes a first single-phase inverter and a second single-phase inverter. The first single-phase... Agent: Leydig Voit & Mayer, Ltd

20070147096 - Power source device and apparatus using same: A power source device includes a transformer having a first winding and a second winding, an oscillator self-oscillating with using the first winding of the transformer and supplying an oscillating voltage to the first winding, a rectifier for converting an AC voltage output from the second winding into a DC... Agent: Ratnerprestia

20070147097 - Apparatus, system, and method for ac bus loss detection and ac bus disconnection for electric vehicles having a house keeping power supply: An alternating current (AC) bus malfunction detection and protection module monitors an AC voltage that is provided on a bus by a house keeping power supply of a power system. If the AC voltage on the bus falls below a first level, the module provides a delay before power inverter... Agent: Seed Intellectual Property Law Group PLLC

20070147099 - Electronic circuits utilizing normally-on junction field-effect transistor: Electronic circuits use low-cost depletion-mode JFET to serve as power switch. Since depletion-mode JFET has smaller conductive resistance and is majority carrier device, the energy loss is less when current flows through the depletion-mode JFET, and faster switching speed is obtained, thereby enhancing the efficiency of the electronic circuits.... Agent: Rosenberg, Klein & Lee

20070147100 - Frequency converting apparatus and control method for the apparatus: The difference between internal processes of a power converting apparatus may bring about a heat difference in the apparatus. In the cooling process, it is presumed that the temperature change of the inverter or converter module may be made so great that the power converting apparatus may be less reliable.... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070139970 - Method and apparatus for space vector modulation in multi-level inverters: An apparatus for space vector modulation of a multi-level inverter, the apparatus comprising: a triangle generator for finding a modulation triangle enclosing a reference voltage vector, the modulation triangle comprising vertex vectors; a duty ratio calculator for determining duty ratios for the vertex vectors; a switching function selector for selecting... Agent: David A. Torrey

20070139971 - Control circuit having programmable waveform for limiting output power of power converter: A control circuit having a programmable waveform for the output power limit comprises an oscillation circuit to generate an oscillation signal. The oscillation signal is used for producing a switching signal to control a switching device in response to a feedback signal of the power converter. A waveform generator generates... Agent: Rosenberg, Klein & Lee

20070139975 - Bi-directional dc-dc converter and control method: The inventive bi-directional DC-DC converter addresses a problem of an insufficient step-up ratio during the step-up operation that is caused when a turns ratio of the transformer is determined to, for example, match the step-up operation and also address a contrary problem of an insufficient step-down ratio during the step-down... Agent: Crowell & Moring LLP Intellectual Property Group

20070139974 - High-voltage power supply device and image forming apparatus: A high-voltage power supply device for generating a voltage in which a direct-current voltage and an alternating-current voltage are superimposed is provided with alternating-current voltage generating unit generating an alternating-current voltage, and direct-current voltage generating unit generating a direct-current voltage to be superimposed on the alternating-current voltage generated by the... Agent: Casella & Hespos

20070139973 - Mcu/driver point of load digital controller with optimized voltage: A system for optimizing the power efficiency of a switching power converter operating at a switching frequency includes a digital controller for receiving an analog signal representing an output DC voltage of the switching power converter for comparison to a desired output voltage level and generating switching control signals to... Agent: Howison & Arnott, L.l.p

20070139972 - Voltage converter: Voltage converter (SCW) for converting a primary/secondary voltage (Up/Us) into a secondary/primary voltage (Us/Up), comprising at least one controlled switch (Sp, Ss), wherein a control circuit (AST) controls, according to its supplied set points, the at least one controlled switch (Sp, Ss) with a variable pulse duty factor and/or variable... Agent: Ratnerprestia

20070139976 - Power management module and method of manufacture: A power management module, provides an inductor including one or more electrical conductors disposed around a ferromagnetic ceramic element including one or more metal oxides having fluctuations in metal-oxide compositional uniformity less than or equal to 1.50 mol % throughout the ceramic element.... Agent: Burns & Levinson, LLP

20070139977 - Method of improving electrical connections in circuitized substrates: A method of improving conductive paste connections in a circuitized substrate in which at least one and preferably a series of high voltage pulses are applied across the paste and at least one and preferably a series of high current pulses are applied, both series of pulses applied separately. The... Agent: Lawrence R. Fraley Hinman, Howard & Kattell, LLP

20070139978 - Current supply circuit, polyphase drive circuit, method of designing current supply circuit: Losses are reduced in a current supply circuit including an inverter having a switching element. The dynamic losses in an IGBT element including a free wheeling diode are proportional to the product of turn-on losses and a switching frequency, and the static losses are proportional to the product of a... Agent: Birch Stewart Kolasch & Birch

20070139979 - Pressure-contact type rectifier: An objective is to provide a pressure-contact type rectifier in which solder that increases the environmental load is not used, and neither burning nor breakage of a rectifying device occurs, even if temperature of the rectifying device increases due to current flowing or force towards outside the rectifying device is... Agent: Buchanan, Ingersoll & Rooney PC

20070139980 - Switching controller having frequency hopping for power supplies and method therefor: A switching controller having frequency hopping is used for reducing the EMI of a power supply. A pattern generator generates a digital pattern code in response to a clock signal. An oscillator generates an oscillation signal for determining a switching frequency of a switching signal. A programmable capacitor coupled to... Agent: J.c. Patents

20070139981 - Control unit for controlling dc/dc converter and dc/dc converter: The present invention is intended to prevent the flow of a large input current into a DC/DC converter, to which power is fed from a power supply, before a supply voltage delivered from the power supply reaches a rated output voltage. A control unit included in the DC/DC converter includes... Agent: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP

20070139982 - Charge pump circuit and power supply apparatus: A high efficiency charge pump circuit and a power supply apparatus that can sense the output current level and change the connection of flying capacitors. The charge pump circuit includes a switching circuit that performs a switching operation of alternately switching between the charge state of charging flying capacitor from... Agent: Greenblum & Bernstein, P.L.C

20070139983 - Synchronous switch reverse recovery reduction in buck converters: An information handling system includes a buck converter, having a synchronous switch, to supply power to an electrical load. A first inductor is placed in series with the synchronous switch, and a second inductor is inductively coupled to the first inductor. A switched path recovers energy stored in the first... Agent: Haynes And Boone, LLP

20070139984 - Resonant conversion control method and device with a very low standby power consumption: A resonant conversion control device with a very low standby power consumption has an AC-to-DC conversion unit, a DC-to-DC conversion unit, a DC-to-DC conversion control unit, and a standby mode control unit. The resonant conversion control device effectively makes use of the low switching loss characteristic of a resonant conversion... Agent: Rosenberg, Klein & Lee

20070139985 - Current fault detector and circuit interrupter and packaging thereof: A power controller is positioned within a current path between the line side and the load side of an electrical circuit. The power controller closes the current path in the presence of a control supply and opens the current path in the absence of the control supply. A power supply... Agent: Fulwider Patton LLP

20070139986 - Signal isolator linear receiver: A signal isolator for providing at an output thereof representations of input currents from a source provided in an input conductor supported on a substrate having a bridge circuit suited for electrical connection to a source of electrical energization with a pair of series circuit members electrically connected in parallel... Agent: Kinney & Lange, P.A.

20070133230 - Multiphase voltage sources driven ac_led: Multiphase voltage sources are used in driving an AC_LED; different light timing is achieved by changing the relative phase or frequency of the voltage sources. Different light color mixing is also achieved when more than one AC_LED with different colors are combined to use.... Agent: Wpat, PC Intellectual Property Attorneys

20070133231 - Control circuit of power converter having adaptive bias for detecting reflected voltage of transformer: A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the reflected... Agent: J.c. Patents, Inc.

20070133233 - Power factor correction using current sensing on an output: A method and apparatus for circuit conditioning, such as for providing power factor correction, is provided, using existing or minimal additional circuitry, at minimal or no additional cost to the manufacture of the circuit. The circuit conditioning is implemented by controlling an output side of the circuit based on a... Agent: Blake, Cassels & Graydon LLP Box 25, Commerce Court West

20070133232 - Technique to improve dynamic response of two-stage converters: A two-stage converter including a buck converter and a DC-DC converter that receives power from the buck converter. The DC-DC converter generates an output voltage of the two-stage converter. A buck control circuit generates a control signal for the buck converter. The control signal is based on a first signal... Agent: Harness, Dickey & Pierce, P.L.C

20070133234 - System and method for a primary feedback switched mode power supply: A primary side controlled power converter having a voltage sensing means coupled to a transformer of the power converter and configured to provide a voltage feedback waveform representative of an output of the transformer is provided. A primary switching circuit operates to control energy storage of a primary side of... Agent: David Kunst Active-semi International Inc.

20070133235 - Power conversion apparatus: A power conversion apparatus is formed by connecting unit communication-assisting means in series between an alternating-current terminal incorporated in a conventional current-type power conversion apparatus, and an alternating-current load. The communication-assisting means includes reverse-blocking-type self-commutated devices and a capacitor. By controlling the switching of the reverse-blocking-type self-commutated devices, a voltage... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070133236 - Dc-dc converter for overvoltage protection: A DC-DC converter for overvoltage protection is provided with a primary control circuit 12 which comprises an impedance controller 31 and a protective circuit 41 for ceasing operation of primary control circuit 12 when power source voltage VCC on primary control circuit 12 exceeds a predetermined voltage level. Impedance controller... Agent: Bachman & Lapointe, P.C.

20070133237 - Power converter: In this power converter, a first capacitor for stepping down of voltage, a first diode for half-wave rectification, and a second capacitor for smoothing are interposed between first and second input connections for input of AC voltage; and a second diode for discharge of the first capacitor is interposed between... Agent: Birch Stewart Kolasch & Birch

20070133238 - Power sourcing equipment having bipolar junction transistor for controlling power supply and supporting ac disconnect-detection function: A power supply system for providing power to a powered device over a communication link includes a power supply device capable of supporting an AC disconnect-detect function. The power supply device has a controller, an output port coupled to the communication link, and a bipolar junction transistor (BJT) controlled by... Agent: Mcdermott Will & Emery LLP

20070133239 - Switching power supply unit and voltage detection circuit: A switching power supply unit is provided, in which a DC input voltage can be detected even if switching operation of the power supply unit is stopped. A switching power supply unit includes: a power supply main section switching a DC input voltage inputted from a first power supply to... Agent: Oliff & Berridge, PLC

20070133240 - Power converter with digital signal processor: An up-converter (100) comprises: an inductor (5) and a diode (6) connected in series with an output (3); a capacitor (8) connected in parallel to said output; a controllable switch (7) having one switch terminal coupled to a node between the inductor and the diode. A control method comprises the... Agent: Philips Intellectual Property & Standards

20070133242 - Method and apparatus for controlling voltage linearity of voltage source inverters: Methods and apparatus are provided for modifying a pulse width modulation signal controlling a voltage source inverter. The method comprises the steps of determining a duty cycle of the signal, clipping the duty cycle when a modulation index is greater than a minimum modulation index and less than a maximum... Agent: General Motors Corporation Legal Staff

20070133241 - Power supply circuits: This invention is generally concerned with power supply circuits, and more particularly, with circuits to supply power to a mains supply, such as domestic grid mains, from a photovoltaic device. A photovoltaic power conditioning circuit for providing power from a photovoltaic device to an alternating current mains power supply line,... Agent: Christopher P Harris Tarolli Sundheim Covell & Tummino

20070127274 - Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor: A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the... Agent: Lerner Greenberg Stemer LLP

20070127275 - Switching power supply capable of reducing low-frequency secondary-side common-mode voltage: The invention discloses a switching power supply capable of reducing a low-frequency secondary-side common-mode voltage. The power supply mainly has two common-mode filtering circuit devices to prevent an AC voltage and an AC current from coupling to a secondary side of a transformer. Thus, the electrical safety and the quality... Agent: Yuan-cheng Chuang

20070127276 - Power supply and display: A power supply capable of making soft start efficiently. A power supply (10) is such that the time lag from the soft start trigger representing the start of soft start control to the actual soft start can be decreased by offsetting the potential of a soft start signal from the... Agent: Cantor Colburn, LLP

20070127277 - Power supply apparatus including charge-pump type step-up circuit operated at clock signal frequency: In a power supply apparatus including a charge-pump type step-up circuit adapted to carry out a stand-by operation to charge a step-up capacitor by a power supply voltage, and carry out a step-up operation to step up a charged voltage of the step-up capacitor and discharge a stepped-up charged voltage... Agent: Sughrue Mion, PLLC

20070127278 - Adjustment device for adjusting wave shape of output of a dc-ac inverter: A DC-AC inverter has an adjustment device for adjusting wave shape of output thereof includes a feedback circuit, and a zero-crossing detector; the feedback circuit will detect and measure output voltage of the inverter, and feedback-control the inverter to make the inverter output a demanded stable fixed voltage, thus preventing... Agent: Rosenberg, Klein & Lee