Electric power conversion systems inventions 11/07

20070274108 - Forward power converters: This invention generally relates to forward power converters, and more particularly to improved systems and methods for operating such converters, and to controllers for implementing these systems and methods. We describe a discontinuous resonant forward power converter including a controller having an output coupled to a controllable switch and which... Agent: Tarolli, Sundheim, Covell & Tummino L.L.P.

20070274106 - Switch mode power supply controllers: This invention relates to SMPS controllers employing primary side sensing. We describe a system for identifying a knee point in a sensing waveform, at which the output voltage of the SMPS may be sampled accurately on the primary side. The system identifies the knee point by fitting a tangent to... Agent: Schwegman, Lundberg & Woessner, P.A.

20070274107 - Switch mode power supply controllers: This invention relates to SMPS controllers employing primary side sensing to detect a point of zero magnetic flux, at which the output voltage of the SMPS may be sampled accurately on the primary side. We describe a switch mode power supply (SMPS) controller for regulating the output voltage of an... Agent: Schwegman, Lundberg & Woessner, P.A.

20070274110 - Semiconductor device, battery protection circuit and battery pack: A bidirectional Trench Lateral Power MOSFET (TLPM) can achieve a high breakdown voltage and a low on-resistance. A plurality of straight-shaped islands having circular portions at both ends are surrounded by a trench arrangement. The islands provide first n source regions and a second n source region is formed on... Agent: Rabin & Berdo, PC

20070274112 - Switch mode power supply controllers: This invention relates to switch mode power supply (SMPS) controllers employing primary side sensing. We describe an (SMPS) controller which uses an area correlator to compare an area under a feedback signal waveform between a start point defined by said first timing signal and an end point defined by said... Agent: Schwegman, Lundberg & Woessner, P.A.

20070274104 - Switching power supply apparatus: There are included an actuation unit supplying an actuation power to a control unit to start a switching operation of a switching element when an alternating-current power sources turned on, and stopping supply of the actuation power to the control unit after the switching operation of the switching element is... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20070274105 - Switching power supply apparatus: A switching power supply that can accurately detect a period during energy is supplied from a primary side to a secondary side of a transformer with a simple circuit configuration is provided. A first switching element and a second switching element are serially connected to opposite output ends of a... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20070274109 - Power supply system for vehicle with improved energy efficiency and vehicle including the same: A matrix converter (38) converts three-phase AC power input from a first motor-generator (MG1) directly to three-phase AC power for driving a second motor-generator (MG2) and outputs the resultant three-phase AC power, without rectifying the three-phase AC power generated by the first motor-generator (MG1) once to DC power as in... Agent: Oliff & Berridge, PLC

20070274111 - Circuit for reducing the variations of auto-supply voltage of a control circuit of a switching power supply: A circuit for reducing the variations of auto-supply voltage of a control circuit of a switching power supply, where the control circuit supplies an activation or deactivation signal of a power transistor, includes an auto-supply voltage generator, a controlled switch capable of selectively connecting the generator to the control circuit,... Agent: Hogan & Hartson LLP

20070274113 - System and method for isolating sources and loads of a power system: A system and method for isolating sources and loads of a power system are disclosed. Briefly described, one embodiment includes at least a DC bus operable at a DC bus voltage; a non-isolated first primary converter module electrically coupled to the DC bus and operable to receive a first amount... Agent: Siemens Corporation Intellectual Property Department

20070274114 - Non-linear droop control system and method for isochronous frequency operation: Non-linear frequency droop control for isochronous frequency operation of parallel inverters includes generating a droop constant corresponding to the power level of the given inverter for maintaining the predetermined frequency range of the given inverter; generating the droop from the given inverter power level and the droop constant and calculating... Agent: Iandiorio & Teska

20070274115 - Harmonics attenuator using combination feedback controller: A harmonics attenuator employing a combination controller that incorporates features of a classic controller and a state space controller to function as a hybrid controller unit. The PID portion of the classic controller regulates the steady state error and is separated from the pulse width modulated constant frequency signal generator... Agent: Fulwider Patton LLP

20070268726 - Method and apparatus for integrated active-diode-oring and soft power switching: A method and an apparatus are used for power supply input connection. The apparatus according to one embodiment comprises a first switch module (143_1) connected to a first power supply input (Vin1); a first controller module (145_1) connected to the first power supply input (Vin1) and to a secondary power... Agent: Honeywell International Law Department Ab 2

20070268727 - Circuit connection control system of fuel cell and method of operating the same: A circuit connection control system of a fuel cell includes a point connection portion to which an anode current collecting portion and a cathode current collecting portion of each unit cell are electrically connected, a voltage measuring unit that measures an output voltage of each unit cell, a switching unit... Agent: Stein, Mcewen & Bui, LLP

20070268725 - Zero voltage switching high-frequency inverter: There is provided a zero-voltage switching high-frequency inverter capable of supplying a current of a large amplitude operation to a load, while suppressing a main switch current. The zero-voltage switching high-frequency inverter according to the present invention comprises: a first switch S1 and a second switch S2 that are connected... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20070268729 - Half-bridge power converter system and method of operation: In one embodiment, a power converter generates an output voltage by modulating an input voltage according to operations of a first switch and a second switch connected in a half-bridge arrangement. The power converter includes a switch driver circuit for controlling the turning on and off of the first and... Agent: Sidley Austin LLP

20070268728 - Carrier-based pulse-width modulation (pwm) control for matrix converters: A matrix converter includes a plurality of switches that electrically connect a multi-phase input voltage source to a multi-phase load; and a controller to output pulse-width modulated (PWM) switching signals to control the switches to produce a multi-phase output voltage from the multi-phase input voltage source. The controller outputs the... Agent: Shumaker & Sieffert, P. A.

20070263416 - Method and apparatus for switching performance: A method and an apparatus for switching performance are provided. The method includes: providing a performance adjustable circuit working at a specific threshold frequency; determining a working power supply of the performance adjustable circuit; when the working power supply is higher or lower than a specific threshold level range corresponding... Agent: Jianq Chyun Intellectual Property Office

20070263419 - Under voltage lock out circuit and method: A voltage comparison unit compares a battery voltage with a predetermined threshold voltage, and outputs a comparison signal. A sequence circuit receives the comparison signal and a start-up signal instructing start-up of equipment mounted with a UVLO circuit, and executes a predetermined sequence when start-up is instructed by the start-up... Agent: Cantor Colburn, LLP

20070263415 - Two terminals quasi resonant tank circuit: A power converter includes a transformer, a primary switch, an auxiliary switch, first and second resonance capacitors, and a secondary side rectification means. A switch mode power supply is formed to use reflected voltage and parasitic capacitance as an energy source for a transformer resonance. The auxiliary switch effectively exchanges... Agent: Haverstock & Owens LLP

20070263417 - Power factor correction power supply: Provided herein is a power factor correction (PFC) power supply, comprising: a bridge rectifier having an input and an output, a filter capacitor connected to the output of the bridge rectifier, a transformer having a primary winding, a fly-back winding and a secondary winding, a forward diode, a fly-back diode,... Agent: Matthias Scholl

20070263418 - Method for operation of a converter circuit, as well as an apparatus for carrying out the method: A method for operation of a converter circuit is specified, wherein the converter circuit has a converter unit with a multiplicity of drivable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which method the drivable power semiconductor switches are... Agent: Buchanan, Ingersoll & Rooney PC

20070263420 - Charging circuit: In a charging circuit charging a battery based on a power supply voltage from an external power supply, a charging transistor is provided on a path from the external power supply to the battery. A charging control circuit is integrated on a semiconductor substrate, and adjusts an ON state of... Agent: Cantor Colburn, LLP

20070263421 - Dc power source device: A DC power source device is provided which comprises conduction detectors 17, 18 for producing detection signals VP1, VP2 during the detective period of rectification MOS-FETs 15, 16 and timer circuits 19, 20 connected to polarity detectors 17, 18. Timer circuits 19, 20 count output time of detection signal VP1,... Agent: Bachman & Lapointe, P.C.

20070263422 - Device and method for controlling a converter and electric converter comprising one such device: The control device of an electric power converter comprises a control circuit controlling turn-on of power semi-conductor arms. The control circuit comprises a module for determining possible turn-offs of an arm, and a module for selecting turn-offs enabling double switching from among the possible turn-offs. Selection of turn-offs enabling an... Agent: Steptoe & Johnson LLP

20070258272 - Switched mode power supply with frequency modulation control: A frequency modulation controller for use in controlling a switched mode power supply including an input terminal for receiving an input voltage and at least one switch selectively turned on and off to control the output voltage of the power supply in accordance with an embodiment of the present invention... Agent: Ostrolenk Faber Gerb & Soffen

20070258271 - Multi-mhz power converter: The present invention is a multi-MHz line converter providing a zero voltage, zero current converter under all line and load conditions limiting fixed frequency. Having very low noise generation due to its zero voltage, zero current nature, the converter offers a very low cost alternative for off-line low power converters.... Agent: Ivan Meszlenyi

20070258273 - Polyphase line filter: A polyphase line filter includes a first filter branch between a first filter input and a first filter output, the first filter branch comprising a series connection of at least two inductances wound onto different legs of a multi-leg filter core, and a second filter branch between a second filter... Agent: Glenn Patent Group

20070258274 - Medium frequency power generator: An MF power generator includes a DC current supply connected to an inverter. The inverter includes at least one switching element connected to a first-polarity current supply potential, and an output network. Each switching element is provided with a decoupling circuit for decoupling the switching element from a voltage of... Agent: Fish & Richardson PC

20070258275 - Autotransformer ac/dc converter: In an AC/DC converter including an autotransformer having a primary winding connected to an AC power supply network and two secondary windings connected to two rectifier circuits operating in parallel to deliver a DC voltage to a load, the two same-polarity outputs of the two rectifier circuits being connected to... Agent: David E. Huang, Esq. Bainwood Huang & Associates LLC

20070253223 - Method and apparatus for multi-phase power conversion: A system and method for power conversion synchronizes multiple phases at a desired phase angle difference. The power conversion involves variable frequency switching, fixed on-time and provides power factor correction. A relative measure of a phase angle difference between two phases permits each phase to be controlled to obtain the... Agent: Texas Instruments Incorporated

20070253224 - Method and apparatus for power converters having phases spaced at desired phase angles: A system and method for power conversion synchronizes multiple phases at a desired phase angle difference. The power conversion involves variable frequency switching, fixed on-time and provides power factor correction. A relative measure of a phase angle difference between two phases permits each phase to be controlled to obtain the... Agent: Texas Instruments Incorporated

20070253227 - Power converter for use with implantable thermoelectric generator: Method an apparatus for converting the output of a thermoelectric generator to voltages compatible with implantable medical devices is provided. One apparatus includes an implantable thermoelectric generator. The apparatus includes an input terminal for receiving an input voltage generated by a thermoelectric energy converter and a charging inductor connected in... Agent: Schwegman, Lundberg & Woessner, P.A.

20070253228 - Switching power supply: A feedback circuit (3) generates an error amplification signal VEAO for stabilizing an output voltage Vo at the reference voltage. The reference voltage is set beforehand in the feedback circuit (3). The peak value of drain current ID passing through a switching element (1) is controlled by the error amplification... Agent: Steptoe & Johnson LLP

20070253226 - Inverter: Primary and secondary regions are electrically insulated from each other. The first and second pulse transformers are provided to the respective transistors in the switching circuit. Secondary windings of the first and second pulse transformers are connected to control terminals of the transistors. The control circuit supplies switching voltages to... Agent: Cantor Colburn, LLP

20070253225 - Method and apparatus for transformerless safety isolation in a power supply: An apparatus and method are disclosed to provide transformerless safety isolation in a power supply. One example regulated power converter includes input terminals included in a primary circuit of the power converter. Output terminals are included in a secondary circuit of the power converter. A plurality of safety capacitors including... Agent: Blakely Sokoloff Taylor & Zafman

20070253229 - Startup for dc/dc converters: A design and method for controlling the initial inductor current in a DC/DC switching regulator. The Ton or Toff time, depending upon implementation, is gradually increased such that power applied to a load is initially constrained until the system reaches a stable state, at which time normal power is connected... Agent: James E. Eakin

20070253230 - Dc-to-dc converter with improved transient response: A DC to DC converter includes a comparator, a driver, and a pair of switches. The comparator compares the output voltage with a reference voltage signal and generates a PWM signal. The driver drives the switches so as to force the output voltage to follow the reference signal. In a... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20070253231 - Operating a three phase device using single phase power: A powering arrangement for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature... Agent: Carlson Gaskey & Olds