Electric power conversion systems inventions 04/07

20070091649 - Adaptively configured voltage transformation module array: A method and apparatus for adaptively configuring an array of voltage transformation modules is disclosed. The aggregate voltage transformation ratio of the adaptive array is adjusted to digitally regulate the output voltage for a wide range of input voltages. An integrated adaptive array having a plurality of input cells, a... Agent: Fish & Richardson P.C.

20070091648 - Common-mode current cancellation with digital pulses for isolated applications: A mechanism for reducing common-mode current in a system including a first subsystem and an isolated subsystem. The isolated subsystem may receive the common-mode current from the first subsystem via an isolation mechanism. The isolation mechanism (e.g., a transformer) may isolate the isolated subsystem from the first subsystem by blocking... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20070091647 - Switching power supply unit: A switching power supply unit includes a primary-side rectifying circuit that is connected to a commercial power supply and is arranged to output a primary-side nonsmoothed DC voltage, a transformer having a primary winding and a secondary winding, a switching element connected in series with the primary winding to the... Agent: Murata Manufacturing Company, Ltd. C/o Keating & Bennett, LLP

20070091650 - Adaptive sychronous rectification control circuit and method thereof: The adaptive synchronous rectification control circuit and its controlling method for a power converter are provided. The proposed control circuit having a transformer with a primary and a secondary sides, a switch coupled to the primary side and a synchronous rectification transistor (SRT) coupled to the secondary side and having... Agent: Volpe And Koenig, P.C.

20070091651 - Switching mode power supply: A switching mode power supply includes a power supply, a feedback circuit, and a switching controller. The power supply includes a main switch coupled to a primary coil of a transformer and supplies power to a secondary coil of the transformer according to an operation of the main switch. The... Agent: Sidley Austin Brown & Wood LLP

20070091652 - Frequency converter: A frequency converter in which the inductance is reduced by enlarging the forms of bus bars which connect a P phase, an N phase of an inverter part and a positive electrode or a negative electrode of smoothing capacitors and the form of a wiring bus bar which connects an... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070091653 - Method and apparatus for adjustable voltage/adjustable frequency inverter control: An apparatus and method for controlling an inverter, an exemplary apparatus comprising an adjustable frequency controller receiving a reference frequency value and generating a command frequency value as a function thereof, an adjustable voltage controller receiving a reference voltage value and generating a command voltage value as a function thereof... Agent: Susan M. Donahue Rockwell Automation Inc.

20070091654 - Method for correcting a harmonic distortion of a power bridge, in particular for a class d amplifier: To correct for harmonic distortion of a power bridge, the form of a pulse at the output of the power bridge and of estimate of non idealities under different current conditions is acquired. An estimate of a current at the output of the power bridge is also acquired. The switching... Agent: Jenkens & Gilchrist, PC

20070091655 - Switching power supply apparatus provided with series-connected charge pump circuits: A first charge pump circuit converts an input voltage (Vin) into a predetermined voltage, to be outputted as a first output voltage (Vout1). A second charge pump circuit converts the first output voltage (Vout1), outputted from the first charge pump circuit, into a predetermined voltage, to be outputted as a... Agent: Cantor Colburn, LLP

20070091656 - Power adapter: A power adapter is provided. The power adapter includes a housing body having a first side and a plurality of second sides. A plug is located on the first side and is adapted to connect to an AC outlet for providing an AC power. A first DC port is located... Agent: Christie, Parker & Hale, LLP

20070091657 - Method and unit of controlling applied voltages for uniformly charging a photoreceptor: A method of controlling AC voltages applied to a charging member to bring a photoreceptor to a state of uniform charging, with reduced time required for setting AC voltage value. The method includes the steps of determining a relational expression between AC voltage and AC current flowing into the charge... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070091658 - System and method for distributing module phase information: A multi-module DC-DC converter provides synchronization between modules based on identification of a module within a chain. A resistor network can be used for the chain so that each module obtains a particular voltage based on its position within the chain. A master module provides a source current to drive... Agent: Texas Instruments Incorporated

20070091659 - Power converter comprising a controller and a power component mounted on separate circuit boards: In at least some embodiments, a power converter comprises control logic adapted to be mounted on a first circuit board and a power component adapted to be electrically coupled to the control logic and adapted to be mounted on a second circuit board. The first circuit board mechanically attaches to... Agent: Hewlett Packard Company

20070091660 - Monitor and dc/ac converter: A monitor and a DC/AC converter thereof are provided. The monitor includes a lamp and a DC/AC converter. The DC/AC converter includes a pulse width modulation (PWM) unit, a DC/DC converting unit and a Royer circuit. The PWM unit is used for outputting a PWM signal whose pulse width is... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070086215 - Inverter operation modes: Disclosed herein is a three-phase, grid interactive inverter capable of multiple modes of operation including: a normal mode for transferring DC power to a utility grid, a constant AC current mode for limiting inverter output, a constant DC voltage mode used for DC testing, and a PV array simulation mode... Agent: John Vanden Bosche

20070086216 - Bidirectional insulated dc/ac inverter: A plug and an outlet are electrically and directly connected, and when a control circuit determines that AC power is input from a power source to a bidirectional insulated DC/AC inverter by voltage V1 detected in a voltage detection circuit, driving of each bridge circuits is inhibited so as not... Agent: Morgan & Finnegan, L. L.p.

20070086217 - Dc/ac convert for driving cold cathode fluorescent lamp: The present invention discloses a DC/AC converter in the backlight power supply system using cold cathode fluorescent lamp (CCFL). The DC/AC converter comprises a front end DC/DC converter, a full-bridge or half bridge inverter, and a piezoelectric transformer. Even with a wide range of input voltages, the front end DC/DC... Agent: Perkins Coie LLP Patent-sea

20070086218 - Switching power source apparatus: A switching power source apparatus has a switching element being connected with a DC power source through a primary winding of a transformer in which parasitic capacitance exists between terminals of the switching element. A voltage V4 of free oscillation appears at a gate of the switching element after a... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070086219 - Switching power supply circuit: In a switching power supply circuit including a primary side rectifying and smoothing circuit, a switching element, a converter transformer, a secondary side rectifying and smoothing circuit, and a switching element controlling section, a first primary side series resonant circuit is formed by a choke coil and a primary side... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20070086220 - Circuit boards, power adapters and notebook computers for reducing emi characteristics: A circuit board for reducing EMI characteristics and a power adapter and a notebook computer having the circuit board are disclosed. The circuit board includes: a base board; an upper-site transistor having a power pin; and a lower-site transistor having a ground pin; wherein the upper-site transistor and the lower-site... Agent: Bacon & Thomas, PLLC

20070086221 - Power converter methods and apparatus for variable speed high power machines: Methods and apparatus for converting power from a power source are described. In one example embodiment, the method includes controlling multiple transformer and switchgear units coupled to a power source, and controlling multiple converter units connected in parallel. Each converter unit is coupled to a respective one of the transformer... Agent: John S. Beulick (17851)

20070086222 - Bidirectional dc/ac inverter: An input voltage Vc to a bridge circuit is made variable by making a switching element, which is on a lower side among a plurality of switching elements constituting the bridge circuit, a coil and a capacitor, which constitute a filter, operate as an active filters at the time of... Agent: Morgan & Finnegan, L.L.P.

20070086223 - Dc-dc converter: A DC-DC converter of the present invention includes: an activation circuit which activates a control circuit for controlling a turning on and off of a switching element; a second rectifying and smoothing circuit which supplies an output voltage, as a power supply, to the control circuit, the output voltage being... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070086224 - Multiphase dc to dc converter: A multiphase DC to DC converter includes an input, an output, at least first and second converters, an inductor, an output capacitor, and a drive circuit. The drive circuit is configured for switching the first and second converters with a predetermined phase shift therebetween. The output capacitor is operatively coupled... Agent: Harness, Dickey, & Pierce, P.l.c

20070086225 - System and method for powering a load: A power supply for inductively powering a remote device has an inverter operating at an operating frequency and a primary coil. A phase comparator compares the phase of the voltage or current delivered by the power supply. If the phase relationship detected by the comparator is unacceptable, the inverter is... Agent: Warner, Norcross & Judd In Re: Alticor Inc.

20070086226 - Reconfigurable voltage inverter with tolerance to failures: Voltage inverter provided with four switching cells (Q1 to Q4) to be connected to the terminals of a DC voltage source (Vdc), each comprising two semiconductor switches (I11, I12, I21, I22, I31, I32, I41, I42) installed in series, these switches having a common point (A0) to be connected to an... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070081364 - Highly efficient isolated ac/dc power conversion technique: An AC-to-DC power converter that is capable of generating a regulated, isolated DC voltage output from a power factor corrected AC voltage input with improved efficiency. The AC-to-DC power converter is a two-stage power converter including a PFC stage connected in series to a power conversion stage. The PFC stage... Agent: Texas Instruments Incorporated

20070081365 - Switching power supply circuit: In the switching power supply circuit disclosed in the present invention, the DC voltage is supplied to the primary winding in the converter transformer and the AC voltage is generated. First and second series resonant circuit are formed, and the resonant frequency of the first and second series resonant circuits... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20070081366 - Capacitive coupling assisted voltage switching: A system includes a charge pump configured to provide a boosted voltage, a voltage source configured to provide a voltage less than the boosted voltage, and a load. The system includes a coupling capacitance coupled to the load, a first switch coupled between the charge pump and the load, and... Agent: Dicke, Billig & Czaja, P.l.l.c.

20070081367 - Diode power array: A circuit for parasitically powering a device comprises diodes, a capacitor, and an inductor all disposed across a signal line, the inductor disposed in series between the diodes and the capacitor. The first diode is preferably a rectification diode, the second diode is preferably a flyback diode, and a DC/DC... Agent: Hani Z. Sayed, Esq. C/o Rutan & Tucker, LLP

20070081368 - Current source wave voltage inverter voltage-clamping and soft-switching techniques, and fuel cell system using the same: A current-source sine-wave voltage inverter for converting a direct current (DC) voltage to an alternating (AC) voltage includes a DC source for providing a DC voltage, a current source circuit having a primary side inductance of a transformer, a clamping circuit, an inverting circuit, and a control and driving circuit.... Agent: Hdsl

20070081369 - Pwm cycloconverter: A PWM cycloconverter easily capable of improving an input current waveform and regenerating energy of a snubber into a power source is provided. A PWM cycloconverter includes a PWM converter connected to a DC voltage system. An output unit of the PWM converter is connected to a place before an... Agent: Sughrue Mion, PLLC

20070081370 - High-voltage detecting circuit for saving power in standby mode: A high-voltage detecting circuit for saving power in a standby mode is provided. The high-voltage detecting circuit includes a high-voltage detecting module, a switch module and a control module. The high-voltage detecting module is composed of several resistors for detecting a high-voltage power supply. A control terminal of the control... Agent: Herbert L. Allen Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.

20070081371 - Synchronous rectifier control circuits: The subject invention reveals a method to sample the drain source voltage of a power mosfet synchronous rectifier during its on time using high speed low voltage analog comparators and operational amplifiers. The method relies on a sampling switch such as a small signal level high voltage enhancement mode mosfet... Agent: Ernest H. Wittenbreder

20070081372 - High performance inverter charger system: Techniques for high performance inverter charger systems are described herein. In one embodiment, a power supply system includes, but is not limited to, an inverter to generate an AC (alternating current) output based on a DC (direct current) input, a current sensing circuit coupled to the inverter to sense an... Agent: Blakely Sokoloff Taylor & Zafman

20070076443 - Switching power supply circuit: A switching power supply circuit includes a switching element, a converter transformer, a secondary-side rectifying and smoothing circuit, a switching element control unit, a choke coil, a primary-side series resonant circuit, a primary-side parallel resonant circuit, and a series circuit. The switching element implements switching for a direct-current (DC) voltage... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20070076444 - Using a variable frequency drive for non-motor loads: An apparatus for effectively powering non-motor loads with solar power includes a solar array for producing DC power; a variable frequency drive (VFD) connected to the VFD for converting the solar DC power to AC power; a power transformer connected to the VFD; and a non-motor load connected to the... Agent: Worldwater & Power Corp

20070076445 - Power converter: Power converters adapted for providing a plurality of n+1 control parameters for independently supplying a plurality of n lamps and one DC current consumer, usually comprise n inverters, one for each lamp. The power converter (10-50) according to an exemplary embodiment of the present invention provides an independent control of... Agent: Philips Intellectual Property & Standards

20070076446 - Power converter: A power converter is provided which comprises two main MOS-FETs 4, 5 connected in series to a DC power source 1; an oscillator 2 which has two capacitors 3a, 3b connected in parallel to main MOS-FETs 4, 5; a primary winding 9a of a transformer 9 connected between a junction... Agent: Bachman & Lapointe, P.C.

20070076447 - Control circuit for controlling the current and voltage for a switched-mode power supply: This invention relates to a control circuit for the closed-loop control of an output voltage of a primary-controlled switched-mode power supply as well as an associated method. The switched-mode power supply comprises a primary-side switch and a transformer with at least one auxiliary winding in which an auxiliary voltage is... Agent: Michael Best & Friedrich, LLP

20070076448 - Dc-dc converter: A DCDC converter includes a transformer comprising primary and secondary coils. A series connection of the primary coil and a first switch is connected in parallel to a DC power. A series connection of a second switch and a capacitor is connected to both sides of the primary coil. A... Agent: Wood, Herron & Evans, LLP

20070076449 - Switching power source apparatus: A switching power source apparatus has a switching element Q1. Between terminals of the switching element Q1, there is parasitic capacitance (C1, C2). A voltage V4 of parasitic oscillation appears at a gate of the switching element Q1 after a flyback period. A voltage detector detects a drop in the... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070076451 - Active power conditioner for ac load characteristics: An active power conditioner, connecting with a load and a power source in parallel, includes a DC power capacitor, a power converter, a high-frequency filter and a control circuit. The control circuit detects the voltage of the DC power capacitor and the current of the power source, thereby performing a... Agent: Bacon & Thomas, PLLC

20070076450 - Unregulated isolated dc/dc converter with ripple control: In some embodiments, an unregulated isolated DC/DC converter may be configured to receive an input signal and to provide an output signal. A ripple control circuit may be coupled to the unregulated isolated DC/DC converter, wherein the ripple control circuit is configured to reduce an amount of low frequency ripple... Agent: Intel Corporation C/o Intellevate, LLC

20070076454 - Analog current command and settable slopes in voltage regulator: A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes one or... Agent: Fish & Richardson P.C.

20070076453 - Voltage regulator with adaptation control: A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes one or... Agent: Fish & Richardson P.C.

20070076455 - Voltage regulator with common s-phase signals and phase lock loops: A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes a master... Agent: Fish & Richardson P.C.

20070076452 - Voltage regulator with inductor banks: A voltage regulator coupled to an unregulated DC input voltage source by an input terminal, and to a load by an output terminal is disclosed. The voltage regulator converts an input voltage at the input terminal to an output voltage at the output terminal. The voltage regulator includes one or... Agent: Fish & Richardson P.C.

20070076456 - Constant voltage circuit for power adapter: Disclosed herein is a constant voltage circuit for a power adapter which is capable of varying an output voltage with loads so as to reduce the charging time of a system battery. The constant voltage circuit includes a transformer for transforming a primary voltage based on a pulse width modulation... Agent: Lowe Hauptman Berner, LLP

20070076457 - Self-driven synchronous rectification and voltage stabilization circuit: A synchronous rectification and voltage stabilization circuit includes a saturable inductance coil (L1), a synchronous rectifier switch (33), a driving coil (L2) for turning on the synchronous rectifier switch, a discharging coil (L3) which co-operates with a controllable switching component (Q1) to turn off the synchronous rectifier switch, a filter... Agent: North America Intellectual Property Corporation

20070076458 - Timing control circuit for lossless switching converter: A timing control circuit (70) generates staggered signals from a pulse width modulated signal (68) providing lossless switching in a DC to DC power converter (10). The DC to DC power converter (10) comprises two input MOSFET switches (22, 28) coupled to primary windings (34) of an isolation transformer (36)... Agent: Honeywell International Inc.

20070076459 - Apparatus for supplying energy to a load and a related system: Apparatus for supplying energy to a load, comprises a power supply unit (102) e.g. a switched mode electronic transformer or electronic ballast having an input for receiving current at mains frequency and a means for stepping-up said mains frequency to a higher frequency e.g. 30-50 kHz and an output for... Agent: David A. Guerra International Patent Group, LLC