Electric power conversion systems inventions 02/07

20070041221 - Reverse current control system for a power converter: A reverse current control system for first power converter having a synchronous rectifier and an output inductance includes a reverse current module. The reverse current module monitors a first voltage that is based on an output voltage of the output inductance and a second voltage that is based on an... Agent: Harness, Dickey & Pierce, P.L.C

20070041222 - Dc-dc converter: An LC resonant circuit 3 is inserted on a secondary side of a transformer 1. If switching means 2 is turned ON or OFF by driving means 4, output can be obtained on the secondary side through the transformer 1. A resonant current frequency detecting means comprises a current detecting... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070041225 - Method and drive circuit for driving a switch in a switched-mode converter: A method drives a semiconductor switch, which is connected in series with a first coil of a transformer in a switched-mode converter. The method includes driving the switch continuously using a first pulse-width-modulated drive signal. The method further includes driving the switch intermittently using a second pulse-width-modulated signal, responsive to... Agent: Maginot, Moore & Beck Chase Tower

20070041223 - Optocouplerless switched mode power supply: The present invention relates to a switched mode power supply (10, 20). The basic idea of the present invention is that excess magnetic energy still present in the supply transformer when the current of the transformer commutates from the primary side to the secondary side will be transferred to an... Agent: Philips Intellectual Property & Standards

20070041224 - Switch mode power supply control systems: We describe a switch mode power supply (SMPS) controller employing a combination of pulse frequency and pulse width modulation. The controller employs a “gear box” control scheme using two complementary control loops, one for real-time control of the SMPS using PFM and a second using a PWM control scheme which... Agent: Knobbe Martens Olson & Bear LLP

20070041226 - Secondary regulation in a multiple output flyback topology: In one embodiment, a power supply comprises a flyback transformer comprising a primary winding and at least two secondary windings. An output voltage is developed across a first one of the secondary windings. The power supply comprises a transistor coupled to the first one of the secondary windings. The output... Agent: Fogg And Associates, LLC

20070041227 - Method of forming a start-up device and structure therefor: In one embodiment, a start-up controller for a PWM power supply controller is formed to generate a current that is substantially constant for changes in temperature and for changes in an output voltage received by the start-up controller.... Agent: Semiconductor Components Industries, LLC Bradley J. Botsch

20070041228 - Control system and method with constant maximum current for power converter protection: System and method for protecting a power converter. The system includes a first comparator configured to receive a threshold signal and a first signal and to generate a comparison signal. The first signal is a sum of a second signal and a third signal, and the third signal is associated... Agent: Townsend And Townsend And Crew, LLP

20070041229 - Method and device for producing rectifier gating signals using feed forward control: A device 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) for... Agent: Honeywell International Inc.

20070041230 - Driving device for discharge lamps: A driving device for driving discharge lamps (14) includes a first pulse circuit (11), a second pulse circuit (13), and a primary driving circuit (12). The first pulse circuit includes an input end, a first output end (1), and a second output end (2). The second pulse circuit includes an... Agent: Morris Manning Martin LLP

20070035970 - Method and apparatus for output voltage regulation in primary control switched mode power supplies: A voltage sense circuit and power supply regulation technique. In one aspect, a voltage sense circuit utilized in a power supply regulator includes a transformer including a sense winding and an output winding. A first diode is coupled to the sense winding, a first resistor is coupled to the first... Agent: Blakely Sokoloff Taylor & Zafman

20070035971 - Switching power supply circuit: A switching power supply circuit includes a rectifier inputting and rectifying an alternating-current voltage to produce a rectified voltage; a smoothing unit smoothing the rectified voltage; a switching unit including a switching element operable to perform a switching operation; a switching drive unit operable to drive the switching element; an... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20070035972 - Voltage monitoring device and inverter device: A voltage monitoring device 30 includes an AC input portion 31, a rectifier circuit 32, and a detection circuit 33. The AC input portion 31 receives alternating current output from a DC-AC inverter unit 13. The rectifier circuit 32 rectifies the alternating current received at the AC input portion 31.... Agent: Morgan & Finnegan, L.L.P.

20070035973 - Semiconductor device and method for boosting word line: A semiconductor device of the present invention includes a booster circuit that boosts a selected word line (WL) to a given voltage higher than a power supply voltage and a charge pump circuit that retains the boosted word line (WL) at the first given voltage. When the booster circuit boosts... Agent: Wagner, Murabito & Hao LLP

20070035974 - Short-circuit control in the inductance of a voltage step-up converter: The protection of an inductance of a voltage step-up converter, comprising a first switch with an inverted input logic between the inductance and a terminal of connection of a load to be supplied, the control electrode of which can be connected either to the inductance supply voltage, or to a... Agent: Graybeal, Jackson, Haley LLP

20070035975 - Photovoltaic dc-to-ac power converter and control method: An apparatus and method of control for converting DC (direct current) power from a solar photovoltaic source to AC (alternating current) power. A novel DC-to-AC power converter topology and a novel control method are disclosed. This combination of topology and control are very well suited for photovoltaic microinverter applications. Also,... Agent: Distributed Power

20070035976 - Method and arrangement for monitoring a power output stage: The invention relates to a method and arrangement for monitoring a power output stage, whereby the power output stage has at least one half bridge, comprising a series circuit of two semiconductor switches supplied with an operating voltage. The semiconductor switches may be alternately controlled in a conducting state and... Agent: Cohen, Pontani, Lieberman & Pavane

20070035977 - Method and apparatus for balancing active capacitor leakage current: A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high voltage low current transistors, such as for example a PNP bipolar transistor and... Agent: Blakely Sokoloff Taylor & Zafman

20070035978 - Automatic phase converter: Systems for converting single phase power to three phase power are well known, however, these systems may be noisy and wasteful of electrical power because they are prone to being left on for long periods of time when three phase power is not required. To overcome these disadvantages, these converters... Agent: Mr. Robert C. Newman Jr.

20070035979 - Inverter circuit for producing power factor correction effect: Provided is an inverter circuit including a rectification and filter circuit and an inverter driver circuit interconnected the rectification and filter circuit and a load. The inverter driver circuit comprises a second controller for receiving light adjustment cycle signals and outputting electrical conduction cycle signals wherein the second controller is... Agent: Birch Stewart Kolasch & Birch

20070030704 - Ac coupled bias circuit for power converters: A switching power system for converting an input voltage to an output voltage across a transformer is disclosed. The system includes a control circuit. The control circuit has a control input coupled for receiving the output voltage and an output coupled to a primary winding of the transformer. The system... Agent: Quarles & Brady LLP

20070030705 - Voltage source inverter control method: A simple and accurate dead time dispersion measurement method and a voltage source inverter control method that can prevent the occurrence of an unstable phenomenon are provided. The control method controls a voltage source inverter of a PWM system, which includes a power semiconductor device controlling a level of a... Agent: Sughrue Mion, PLLC

20070030707 - Auxiliary circuit for use with three-phase drive with current source inverter powering a single-phase load: The present invention is directed to an auxiliary circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link choke inductor connected to a three-phase current... Agent: Rockwell Automation, Inc./(qb)

20070030706 - Compensation circuit for use with a three-phase drive powering a single-phase load: A compensator circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link capacitor connected to a three-phase voltage source inverter that supplies three-phase power.... Agent: Rockwell Automation, Inc./(qb)

20070030708 - Compensator with filter for use with a three-phase drive powering a one-phase load: The present invention is directed to a compensator-filter circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link capacitor connected to a three-phase voltage source... Agent: Rockwell Automation, Inc./(qb)

20070030709 - Soft start circuit, power supply unit and electric equipment: A soft start circuit includes a constant current source for generating a constant current, a first current mirror circuit for generating from the constant current a first mirror current, a second current mirror circuit for generating from the constant current a second mirror current smaller than the first mirror current,... Agent: Rohm Co., Ltd. C/o Keating & Bennett, LLP

20070030710 - Circuit for testing inrush current: A circuit for testing an inrush current of a power supply includes a rectifier (10), a capacitor (30), and an ammeter (90). The rectifier includes input terminals (1) adapted to connect with an AC supply (Vin), and output terminals (3) adapted to supply a direct voltage. The capacitor is connected... Agent: Morris Manning Martin LLP

20070030711 - Power supply adapter for connecting multiple loads: A power supply adapter includes an input terminal to input an alternating current power supply, a converter circuit electrically connected to the input terminal to convert the alternating current power supply into multiple direct current voltage signals and multiple alternating current voltage signals, a plurality of direct current voltage output... Agent: Nikolai & Mersereau, P.A.

20070030712 - Intelligent rf power control for wireless modem devices: A bypass circuit is disclosed for use with lower power supply voltage PC cards. The bypass circuit controls the power supply voltage fed to a power amplifier when switching between a lower power 8-PSK modulation mode and a higher power GMSK modulation mode. A step-up DC/DC converter provides a higher... Agent: Moore & Van Allen PLLC

20070030713 - Circuits and techniques for capacitor charging circuits: The present invention provides a capacitor charging circuit that efficiently charges capacitive loads. In particular, circuits and techniques are preferably provided for using current from both the primary and secondary windings of a transformer to control ON-time and OFF-time of a switch. This arrangement preferably yields an adaptable ON-time and... Agent: Fish & NeaveIPGroup Ropes & Gray LLP

20070030714 - Enabling circuit for avoiding negative voltage transients: An enabling circuit for enabling a DC-DC converter having a capacitor coupled to an output terminal of the DC-DC converter to be controlled by a control signal. The enabling circuit may include a comparison circuit configured to compare a feedback signal representative of a charge on the capacitor with a... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20070030716 - Multiple output power supply that configures itself to multiple loads: A two stage multiple output power supply device is capable of outputting programmable DC voltages onto multiple outputs. The first stage receives an AC supply voltage and outputs a DC supply voltage. The second stage includes a DC-ID controller and multiple DC-to-DC converters, each DC-to-DC converter receiving the DC supply... Agent: Imperium Patent Works

20070030715 - Power supply that reads power requirement information across a dc power cord from a load: A power supply device that is capable of outputting multiple different output voltages is coupled by a DC power supply cord to an electrical device. An unpowered memory in the electrical device stores information about the power requirements of the electrical device (for example, the DC supply voltage required). In... Agent: Imperium Patent Works

20070030717 - Method for setting switching times, in particular idle times, of an inverter based on detected power, and inverter: The invention concerns a method for an inverter, for inputting power output by a direct current voltage source (2) in an alternating current voltage network (3), whereby the direct current voltage source (2) is chopped, by means of a bridge inverter (5) by alternate switching of parallel-mounted and series-mounted circuit... Agent: William Collard Collard & Roe, P.C.

20070025122 - Ac-to-dc electrical switching circuit: An electrical circuit and method for switching an input voltage onto a load by way of an AC control voltage is provided. A voltage magnitude reduction circuit is configured to be driven by the AC control voltage. A rectifier circuit is operably coupled with the voltage magnitude reduction circuit. Also,... Agent: The Ollila Law Group LLC

20070025123 - Isolated gate driver circuit for power switching devices: Embodiments of isolated gate driver circuits are disclosed for driving high- and low-side switching devices for half- and full-bridge power converter topology. Disclosed circuits provide sufficient dead-time, operate over a wide range of duty cycles, and require a single power supply (Vcc). Typical applications for such circuits include cold cathode... Agent: Perkins Coie LLP Patent-sea

20070025124 - Power supply system and apparatus: The present invention relates to a switched mode power supply with programmable digital control and to a power supply system comprising a plurality of switched mode power supplies. The input terminals and the output terminals of the switched mode power supply system are separated by an insulation barrier, and the... Agent: Locke Liddell & Sapp LLP Attn. Docketing

20070025125 - Switching power supply unit: The present invention provides a switching power supply unit capable of suppressing a surge voltage generated in a rectifier element more effectively. A first resonance circuit is constructed by capacitors in a surge voltage suppressing circuit and an inductor, and resonance time of the first resonance circuit is set to... Agent: Oliff & Berridge, PLC

20070025126 - Converter circuit for connecting a plurality of switching voltage levels: A converter circuit is specified for switching a large number of switching voltage levels, which has n first switching groups for each phase, with the n-th first switching group being formed by a first power semiconductor switch and a second power semiconductor switch, and with the first first switching group... Agent: Buchanan, Ingersoll & Rooney PC

20070025127 - Switched current power converter with reduced power losses during low load conditions: A switched current power converter includes an input power source, an output terminal, and a plurality of current stages. Each of the current stages includes a converter coupled to the input power source for providing a current and a switch circuit that selectively couples the current in such current stage... Agent: Harness, Dickey, & Pierce, P.l.c

20070025128 - Power supplying apparatus and electronic device using the same: A power supplying apparatus to supply DC power for driving an electronic device, and an electronic device using the same that includes an AC/DC converter which converts input AC power into the DC power; and an AC switch which switches the AC power input to the AC/DC converter, based on... Agent: Stein, Mcewen & Bui, LLP

20070025129 - Systems and methods for reducing the magnitude of harmonics produced by a power inverter: Systems and methods for operating a pulse width modulation (PWM) circuit in a direct current (DC) to alternating current (AC) power inverter to reduce the magnitude of harmonics. The PWM circuit operates using a reference signal having an irregular period. This irregular periodicity may comprise a sequence of periods uniformly... Agent: Lewis, Rice & Fingersh, Lc Attn: BoxIPDept.

20070025130 - Method for controlling a polyphase voltage inverter: The present invention relates to a method for controlling a polyphase voltage inverter the inverter being designed to control a load in terms of pulse width modulation and to be connected upstream to a voltage source via a DC bus and downstream to an electrical load. It is connected to... Agent: Berenato, White & Stavish