Electric power conversion systems inventions 09/07

20070223260 - Power supply device with inrush current control circuit: A power supply device (1) converting received power signals to direct current signals to ensure a load to work normally. The power supply device includes a transformer circuit (10), a rectifier circuit (11), and an inrush current control circuit (12). The transformer circuit converts the received power signals to alternating... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070223261 - Power conversion circuit control apparatus: This invention provides a power conversion circuit control apparatus which rapidly detects the voltage amplitude and phase of each phase, corrects the output of a current controller by the mean voltage amplitude and mean phase, and corrects, on the basis of the voltage amplitude and phase of each phase, a... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070223255 - Monolithic miniature voltage converter with very low input voltage: A DC voltage conversion device including a DC/DC converter and an energy reservoir capable of providing a starting voltage to the DC/DC converter.... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070223256 - Power device: The present invention provides a power device including a converter part (2) for converting an AC voltage to a DC voltage; an inverter part (3) for converting the DC voltage outputted from the converter part (2) to the AC voltage; and a transformer (4) having an inductance forming a series... Agent: Sughrue-265550

20070223257 - Method and circuit for controlling a rectifier: A method for controlling a rectifier, connected to an AC power network, of a drive converter which is provided with a load-end pulse-controlled rectifier is disclosed. An electronically controlled switch is electrically connected in parallel to every diode of the rectifier. The switching operations of the switches are produced in... Agent: Henry M Feiereisen, LLC

20070223258 - Multilevel converters for intelligent high-voltage transformers: A power conversion device includes a switched AC-to-DC converter circuit coupled to a device input and a switched DC-to-AC converter circuit coupled to the switched AC-to-DC converter circuit and a device output. The switched AC-to-DC converter circuit and the switched DC-to-AC converter circuit are configurable for multi-level step-up and/or step-down... Agent: Electric Power Research Instiute

20070223259 - Apparatus and method for monitoring load driving circuit for abnormality: An ECU executes a program including the steps of: when a DC/DC converter is boosting the voltage, calculating a VB estimate value, and if a state, where an absolute value of a difference between the VB estimate value and a VB value sensed by a VB sensor is at least... Agent: Oliff & Berridge, PLC

20070223262 - Multiple inverter system with single controller and related operating method: Methods for controlling a multiple DC-to-AC inverter system, which is suitable for an electric or hybrid vehicle application, are disclosed. In one embodiment, if an inverter fails or suffers from degraded performance (faulty inverter), the faulty inverter is disabled and drive signals to a healthy inverter that is coupled to... Agent: Christopher Devries General Motors Corporation, Legal Staff

20070217229 - Bi-directional isolated dc/dc converter: A bi-directional converter for converting voltage bi-directionally between a high voltage bus and a low voltage bus, comprising a switching converter connected across the high voltage bus, the switching converter comprising first and second switching modules connected in series across the high voltage bus, a switched node disposed between the... Agent: Vishay/siliconix C/o Murabito, Hao & Barnes LLP

20070217233 - Apparatus and method for supplying dc power source: An apparatus and method for supplying a direct current power source which is capable of compensating a power factor of an input power source by detecting an input current amount according to load changes, the apparatus comprising an input current detecting unit for detecting an input current amount to determine... Agent: Greenblum & Bernstein, P.L.C

20070217236 - Apparatus and method for supplying dc power source: An apparatus and method for supplying a direct current power source capable of compensating a power factor of an input power source by increasing and decreasing energy required by load changes, the apparatus comprising: an input current detecting unit for detecting an input current amount to determine a load size,... Agent: Greenblum & Bernstein, P.L.C

20070217230 - Switching power supply having dual current feedback: An arrangement for use in a switching power supply includes a power supply output line, a current sensing circuit, and a feedback circuit. The output line is operably coupled to an output winding of a transformer. The transformer has a first winding operably connected to a switching device configured to... Agent: Maginot, Moore & Beck Chase Tower

20070217232 - Method and apparatus for digital control of a switching regulator: Various techniques directed to the digital control of a switching regulator are disclosed. In one aspect, a power supply regulator includes a compare circuit to be coupled to receive a feedback signal representative of an output level of a power supply. This causes a feedback state signal to be generated... Agent: Blakely Sokoloff Taylor & Zafman

20070217231 - Power supply apparatus for arc-utilizing apparatuses: A power supply apparatus for use with arc-utilizing apparatuses includes a plurality of power supply blocks (2a, 2b) of the same capacity. Each power supply block (2a, 2b) includes an input-side rectifying circuit (4a, 4b), an inverter (10a, 10b), a transformer (12a, 12b), and an output-side rectifying circuit (18a, 18b).... Agent: Duane Morris, LLPIPDepartment

20070217234 - Switching power supply: A switching power source is capable of conducting constant-current drooping control on a load, increasing an energy conversion efficiency on a secondary side, and improving heat radiation performance. The switching power source detects whether or not an overcurrent exceeding a reference value V6 is passed to a switching element Q1,... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070217235 - Single stage power factor corrected power converter with reduced ac inrush: The improved single stage power converter circuit topology substantially reduces EMI that is conducted to the AC line, reduces input AC current inrush, improves output ripples by the use of an auxiliary supply near zero crossings of the line AC voltage, provides Power Factors greater than 0.95, provides Total Harmonic... Agent: Patton Boggs LLP

20070217237 - Dimmer for preventing asymmetric current flow through an unloaded magnetic low-voltage transformer: A two-wire dimmer is operable to control the amount of power delivered to a magnetic low-voltage (MLV) load and comprises a bidirectional semiconductor, a timing circuit, a trigger circuit having a variable voltage threshold, and a clamp circuit. When a timing voltage signal of the timing circuit exceeds an initial... Agent: Lutron Electronics Co., Inc. Mark E. Rose

20070217238 - Power supply apparatus: The power supply apparatus includes a stepdown switching power supply circuit having a switching element and a smoothing circuit, a filter circuit located in the upstream of the stepdown switching power supply circuit and having a noise-suppressing inductor, and a stepup switching power supply circuit having a switching element and... Agent: Nixon & Vanderhye, PC

20070217239 - Inverter: An inverter includes an intermediate circuit, inverter bridge branches downstream of the intermediate circuit for outputting a power signal, and a controller operable for individually turning on and off the inverter bridge branches. The controller may individually turn on and off the inverter bridge branches as a function of an... Agent: Brooks Kushman P.C.

20070217240 - Frequency feedforward for constant light output in backlight inverters: In a method and system for an improved inverter providing power to a load, the inverter receives a direct current (DC) input. A plurality of switches included in the inverter are controlled by a plurality of control signals to generate an alternating current (AC) output in response to the DC... Agent: Haynes And Boone, LLP

20070217241 - Inverter unit: The inverter unit includes: a semiconductor chip constituting an arm of an inverter; a first conductor 33 joined to a positive side of the semiconductor chip; and a second conductor 35 joined to a negative side of the semiconductor chip. The first and second conductors are disposed above a cooler... Agent: Foley And Lardner LLP Suite 500

20070217242 - Combined modulator and inverter: A combined modulator and inverter for use in transmitting audio files to a receiver. The combined modulator and inverter enables the usage of various devices in a vehicle that utilize different types of power sources. Audio devices may be used with the modulator and inverter to play the devices over... Agent: Wolf, Block, Schorr & Solis-cohen LLP

20070217243 - Pwm cycloconverter and control method for pwm cycloconverter: The PWM cycloconverter for solving the above-described problem includes: an input voltage phase detector (6) for detecting the phase of the voltage of a three-phase ac power source (1); a current direction detector (7) for detecting the direction of a current supplied to a two-way semiconductor switch (3); and a... Agent: Sughrue-265550

20070211502 - Voltage step-up circuit and electric appliance therewith: A charge-pump voltage step-up circuit that produces a desired output voltage by stepping up an input voltage with an output capacitor combined with a plurality of stages of voltage step-up units has a voltage step-up factor switcher controlling how many stages of the voltage step-up units are operated according to... Agent: Fish & Richardson P.C.

20070211503 - Charge-pump type switching power supply apparatus: A switching power supply apparatus generates a first output voltage with a reversed polarity of an input voltage and a second input voltage of double the input voltage with the reversed polarity, and then outputs them from the first output terminal and the second output terminal. A driver circuit includes... Agent: Cantor Colburn, LLP

20070211505 - Power supply control apparatus and method of using the same: A power supply control apparatus and method are provided. The apparatus includes a controller outputting a first pulse width modulation (PWM) signal for supplying an electric power and a second PWM signal to be compared to the first PWM signal, a first PWM signal input unit converting the second PWM... Agent: Roylance, Abrams, Berdo & Goodman, L.L.P.

20070211498 - Boost converter: A boost converter comprising an optional RFI-filter, a boost inductor (LB), two switch transistors connected in series (t2, T3) and at least one diode (D6, D7). The boost inductor is connected in series with the switch transistors directly to the AC mains voltage for producing a boosted AC voltage. The... Agent: Philips Intellectual Property & Standards

20070211499 - Dc-ac converter and controller ic therefor: An inventive inverter has a semiconductor switch circuit connected to the primary winding of a transformer. The semiconductor switch circuit is respectively controlled by PWM to supply a constant current to the load connected to a secondary winding of the transformer. The inverter is capable of deliberately regulating its ac... Agent: Hogan & Hartson L.L.P.

20070211500 - Dc-dc converter with direct driven synchronous rectifier: A DC-DC converter with a direct driven synchronous rectifier is disclosed, comprising: a DC-AC converter receiving a DC voltage; a transformer having one primary winding coupled to the DC-AC converter and at least two secondary windings; a synchronous rectifier having two transistors; and an output filter coupled to the synchronous... Agent: Bacon & Thomas, PLLC

20070211501 - Power converter with reduced common mode voltage: An improved power converter that produces reduced-levels of common-mode voltages, or even entirely eliminates such voltages, is disclosed herein, along with a method of reducing common-mode voltages. In at least some embodiments, the improved power converter is equipped with common-mode filter inductors and a link coupling input and output ports... Agent: Rockwell Automation, Inc. / Whd Attention: Susan M. Donahue

20070211504 - Ac-dc converter circuit and power supply: An AC-DC converter and a power supply are described.... Agent: Kathy Manke Avago Technologies Limited

20070211506 - Power converting apparatus, electronic apparatus comprising the same and power converting method: A power converting apparatus includes a power input part to which power is input; a power converting part converting the power input through the power input part; a converting current detecting part detecting a converting current of the power converted in the power converting part; a converting voltage detecting part... Agent: Stein, Mcewen & Bui, LLP

20070211507 - 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: John D. Pirnot Advanced Energy Industries, Inc.

20070211508 - Semiconductor integrated circuit with voltage generation circuit, liquid crystal display controller and mobile electric equipment: There is to be provided a liquid crystal drive controller with a built-in power supply circuit wherein latch-up is made difficult to arise even if one amplitude level of the segment line drive voltage is set to the ground potential and the levels of other liquid crystal drive voltages are... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070206394 - Power supply device: A power supply includes a rectification circuit 2 for rectifying the AC output from a power generator 1 and a non-insulation type DC/DC converter 3 for stepping down the DC output from the rectification circuit 2. A self-excited oscillation type converter (RCC) 4 is provided at the following stage of... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070206395 - Class e amplifier with inductive clamp: A power supply including an inverter receiving a DC input signal from a DC input source (11). The inverter is implemented as a single-ended inverter. Each inverter is driven by a signal source (13A, 13B), which outputs an AC signal. The output from each inverter is input to a first... Agent: Harness, Dickey & Pierce, P.L.C