Electric power conversion systems inventions 03/07

20070070653 - High voltage high side transistor driver: A high side transistor driver includes a sender module that generates a power input signal. A converter module receives the power input signal and generates an output signal that has a higher voltage than the power input signal. A receiver module receives the output signal and the power input signal... Agent: Harness, Dickey & Pierce P.L.C

20070070654 - Voltage supplying apparatus using a fuel cell: A voltage supplying apparatus using fuel cell to be a voltage source is provided. The voltage supplying apparatus comprises a fuel cell, a DC-DC voltage converter and a control circuit. The DC-DC voltage converter is used to receive the voltage outputted from the fuel cell and then output another voltage.... Agent: Liu, Ching-hsiung

20070070655 - Dc-dc converter: To provide a DC-DC converter allowing miniaturization of a voltage transformer without fear of reducing conversion efficiency due to saturation of the transformer and allowing enhancement of conversion efficiency by suppressing switching loss. An LC resonance circuit 3 is inserted on the secondary side of a transformer 1. When driving... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070070656 - Electric power converter circuit: An electric power converter circuit includes a rectifying circuit having diodes, a coil, and a full-bridge circuit including switching devices, which are connected in cascade to an AC power supply 1, to convert an AC to a DC and to further convert the concerted DC to an AC. The converter... Agent: Kanesaka Berner And Partners LLP

20070070657 - Switching power source device: A switching power source device is provided which comprises a secondary MOS-FET 9 connected between a secondary winding 6 of a transformer 2, a reactor 11 connected in parallel to secondary winding 6 of transformer 2 for accumulating energy during the on-period of primary MOS-FET 4, and a secondary control... Agent: Bachman & Lapointe, P.C.

20070070659 - Cascode switch power supply: A switching power supply is disclosed for improving the no-load power drain of low-power mains operated supplies. The power converter utilizes a cascoded switch arrangement with a conventional high voltage power MOSFET and a low voltage, low gate charge MOSFET. Driving only the small low voltage device reduces the power... Agent: Carl K. Sawtell Acutechnology Semiconductor Inc.

20070070658 - Energy effective switching power supply apparatus and an energy effective method thereof: An energy effective switching power supply apparatus and an energy effective method thereof. The energy effective switching power supply apparatus includes a power transforming part having first and second coils to induce a voltage to the second coil using interactions between the first and the second coils with respect to... Agent: Stanzione & Kim, LLP

20070070660 - Method and apparatus for estimating line inductance for pwm rectifier control: A rectifier includes a switching circuit and a controller. The switching circuit is coupled between positive and negative buses and a plurality of input voltage sources. The switching circuit includes a plurality of pairs of switching devices. Each pair is associated with one of the input voltage sources. The controller... Agent: Susan M. Donahue Rockwell Automation, Inc.

20070070661 - Logic circuitry powered by partially rectified ac waveform: Logic circuitry is powered by a partially rectified alternating current (ac) waveform. The waveform is partially rectified in the sense that it does not provide a clean, primarily dc power signal. Instead, it is possible to power logic circuitry with a waveform that includes a substantial ac component. The partially... Agent: 3m Innovative Properties Company

20070070662 - Apparatus for providing voltages to motherboard: An apparatus for providing voltages to a motherboard includes a power supply, a first converting unit, a first regulating unit, and a driving unit. The first converting unit includes an input terminal connected to the power supply and an output terminal. The first regulating unit includes an input terminal, an... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070070663 - Method and related circuit for protection against malfunctioning of the feedback loop in switching power supplies: A method and the related circuit protect against malfunctioning of the feedback loop in switching power supplies. More particularly, the circuit identifies a condition of excessively high voltage at the output. In one embodiment the circuit for the protection against malfunctioning of the feedback loop of a switching power supply... Agent: Seed Intellectual Property Law Group PLLC

20070070664 - Bi-directional current sensing circuit: A current sensing circuit that determines an output current of a bi-directional converter circuit comprises a current transformer that receives a first current signal and that outputs a second current signal. The first current signal is indicative of the output current and flows in one of a first direction and/or... Agent: General Motors Corporation Legal Staff

20070070665 - Q-boosting circuit: Provided is a Q-boosting circuit for improving a Q factor in a radio frequency (RF) integrated circuit of a semiconductor device using a transformer instead of an inductor. The Q-boosting circuit couples a negative resistance circuit to a pair of terminals of a transformer to reduce a resistance component of... Agent: Ladas & Parry LLP

20070070666 - Cellular inverter with reduced switching distortion: A cellular inverter generates an alternating output voltage by a succession of serial combinations of DC voltage electrical sources that are available to it within switchable cells and, within a serial combination currently in use, by a voltage regulation using high-frequency chopping. This voltage regulation exhibits a certain lag and... Agent: Lowe Hauptman Gilman & Berner, LLP

20070070667 - Multiple inverter system with single controller and related operating method: A multiple DC-to-AC inverter system, which is suitable for an electric or hybrid vehicle application, includes a plurality of inverters controlled by a single controller. One example embodiment includes four three-phase inverters driving one six-phase motor, where the output of the first inverter is coupled to the output of the... Agent: General Motors Corporation Legal Staff

20070070668 - Programmable electrical power systems and methods: Systems and methods for programmable electrical power conversion are disclosed. In one embodiment, a programmable electrical power system includes an inverter apparatus selectively coupleable to a direct current energy source and adapted to receive a control signal, and operable to variably convert the direct current energy to a selected alternating... Agent: Lee & Hayes, PLLC

20070064451 - Series resonant dc-dc converter: A series resonant Dc-DC converter powers an audio amplifier as a load. The series resonant DC-DC converter may include a power input stage, a switching stage, a series resonant stage, a transformer stage and a power output stage. The series resonant DC-DC converter further may include a clamping stage and... Agent: Brinks Hofer Gilson & Lione

20070064452 - Switching power supply and control method thereof: A switching power supply is provided. The switching power supply includes an auxiliary circuit, a transformer having a primary side connected with said auxiliary circuit in parallel and a secondary side, a main switch having one end connected with the primary side of the transformer and a control terminal, a... Agent: Volpe And Koenig, P.C.

20070064453 - Dc-dc converter and method of controlling thereof: A DC-DC converter can prevent intermittent failure of a PWM or driving signal (VM) when a load becomes light and prevent generation of unusual noise from a transformer. The converter includes a transformer (2) having a primary winding (2a) and a secondary winding (2b), a semiconductor switching element (17) connected... Agent: Rossi, Kimms & Mcdowell LLP.

20070064454 - Circuit and method for soft start from a residual voltage: A circuit and method for soft start of a system compare a feedback signal produced from an output voltage of the system with a ramp signal to generate a comparison signal, and enables the system once the comparison signal indicating the ramp signal reaches the feedback signal, such that the... Agent: Rosenberg, Klein & Lee

20070064455 - Dc-dc converter including short-circuit protection circuit: Provided is a DC-DC converter including a short-circuit protection circuit which can stably perform a reset operation and a stop operation. The short-circuit protection circuit includes a detection circuit, a delay circuit, and a latch circuit. The delay circuit is reset in response to an output voltage abnormality signal related... Agent: Brinks Hofer Gilson & Lione

20070064456 - Multi-phase converter with improved load step-up transient response: A multi-phase converter comprising a plurality of switching circuits each providing a switched voltage to an output node of the converter and wherein each switching circuit sequentially provides a switched output voltage to the output node at which an output voltage of the converter is developed; a clock circuit for... Agent: Ostrolenk Faber Gerb & Soffen

20070064457 - Methods and apparatus for resistance compression networks: A resistance compression network substantially decreases the variation in effective resistance seen by a tuned rf inverter as loading conditions change. Circuits can include resistance compression networks and rectifiers to form rf-to-dc converters having narrow-range resistive input characteristics.... Agent: Daly, Crowley, Mofford & Durkee, LLP

20070064458 - Electrical power stabilisation: Use of a common electrical power bus to which a number of electrical power generators and consumers are coupled is well known. Typically, a high electrical capacitance is provided across the bus in order to provide stabilisation in the switching of generators and consumer devices as well as differences in... Agent: Manelli Denison & Selter

20070064459 - Control device for a three-phase machine and method for operating the control device: A control device for a three-phase machine contains an inverter, which can be connected on the input side to a direct voltage source and on the output side to the three-phase machine. The control device further has a reactive power converter, which on the output side is terminated by a... Agent: Lerner Greenberg Stemer LLP

20070064460 - Apparatus and method for current control in h-bridge load drivers: An electronic current control circuit is provided. This electronic circuit comprises a power-supply, an H-Bridge module connected to a load, and a current sensor connected between the H-Bridge module and the power-supply and adapted to sense load current characteristics. A computerized controller is connected to the current sensor and the... Agent: David A. Novais Patent Legal Staff

20070058398 - Start-up apparatus for power converters: A start-up apparatus for a power supply is presented. A charging path from an input voltage to a holding capacitor is cut off after the power converter starts up. The start-up apparatus includes a transistor having a drain supplied with the input voltage, and a source connected to the holding... Agent: Rosenberg, Klein & Lee

20070058399 - Switched-mode power supply: The switched-mode power supply has a transformer which contains a primary winding and at least one secondary winding, a switching transistor in series with the primary winding, a driver stage for controlling the switching transistor, and a control circuit for controlling an output voltage. The control circuit in this case... Agent: Thomson Licensing Inc.

20070058400 - Switching power supply circuit and frequency converter: An object of the present invention is to lower the voltage applied to the starting resistor of the starting circuit in a switching power supply circuit to reduce the power loss especially when the receiving voltage is high and thereby provide a small and inexpensive switching power supply circuit. According... Agent: Townsend And Townsend And Crew, LLP

20070058401 - Integrated converter having three-phase power factor correction: An integrated converter having three-phase power factor correction is provided. The integrated converter includes two PFC circuits. Two DC/DC converters are controlled and switched by the integrated converter in accordance with a three-phase AC power source so as to convert the AC power source into a DC power source. The... Agent: Volpe And Koenig, P.C.

20070058402 - Vrms and rectified current sense full-bridge synchronous-rectification integrated with pfc: A synchronous full bridge rectifier is controlled to provide a power factor near unity. The full bridge rectifiers are transistors each with a controlling input. The AC input signal and currents within the circuit are sensed and sent to a controller. In response, the controller output control signals to turn... Agent: Cesari And Mckenna, LLP

20070058403 - Apparatus and methods for monitoring parallel-connected power switching devices responsive to drive circuit parameters: An apparatus, such as an inverter or rectifier in a double-conversion UPS, includes a plurality of power switching devices, such as IGBTs, coupled in parallel. A drive circuit is coupled to the power switching devices at a plurality of drive nodes and configured to drive the drive nodes responsive to... Agent: Myers Bigel Sibley & Sajovec

20070058406 - Control device for power conversion circuit: The control device for controlling a power conversion circuit having voltage-controlled type switching elements includes a control unit generating conduction control signals for controlling conduction states of the switching elements in accordance with an external command, and a driver circuit applying a conduction control terminal of each of the switching... Agent: Nixon & Vanderhye, PC

20070058405 - System and method for reducing harmonic effects on a power delivery system: A power delivery system, and a method for operating it includes a plurality of power cells that are electrically connected to a multi-winding machine comprising one or more primary windings and a plurality of secondary windings such that each cell is electrically connected to one of the secondary windings and... Agent: Siemens Corporation Intellectual Property Department

20070058404 - Voltage conversion device: A control device (30) calculates an upper limit value of a duty ratio (DR_Ulim) according to a voltage (Vm) from a voltage sensor (13) and a threshold voltage (OVb) when an overvoltage is determined to have been applied to a battery (B), and determines a duty ratio (DR) for providing... Agent: Oliff & Berridge, PLC

20070053210 - Dc-dc converter: A DC-DC converter comprises a switching circuit having first and second switching elements to which a direct current voltage is supplied, the first and second switching elements making a periodic operation so that one of the switching elements is turned on while the other one is turned OFF during a... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.c.

20070053211 - Power supply capable of ac and dc input utilizing winding of transformer as boost inductor: A programmable AC/DC power converter receives a plurality of input voltages and outputs a single voltage from an input voltage system. A transformer receives the single voltage. One of the plurality of input voltages is provided at a center tap of a secondary winding of the transformer. A transformed voltage... Agent: Pillsbury Winthrop Shaw Pittman LLP

20070053212 - Feed-forward circuit for adjustable output voltage controller circuits: A feedback loop in a variable power supply has an adjustable response speed based on operating conditions of the power supply. The response speed can be increased upon encountering a transient to improve response performance to the transient. A response speed control for the control loop modifies or bypasses a... Agent: Texas Instruments Incorporated

20070053213 - Wide-voltage-range converter: A wide-voltage-range converter with a power-supply-side converter unit and a load-side converter unit includes a step-up converter electrically connecting the DC voltage sides of the power-supply-side converter unit and the load-side converter unit, respectively. The wide-voltage-range converter further includes a bidirectional switch and a turn-off semiconductor switch as converter unit... Agent: Henry M Feiereisen, Llc

20070053214 - Power system and method of controlling: In a start-up mode (MS), at a start instant (t3, t13), a power converter (11) starts operating. After a predetermined period of time (T2, T12) from the start instant (t3, t13) it is checked whether the output voltage (Vo) of the power converter (11) has a desired value or not.... Agent: Philips Intellectual Property & Standards

20070053215 - Ac/dc converter capable of actively restraining an inrush current: An AC/DC converter includes a rectifier circuit, at least one restraining unit, and a power interruption detection circuit. The rectifier circuit is used for converting an AC (alternating current) to a DC (direct current) power source. The restraining unit is connected to an output terminal of the AC power supply.... Agent: Patenttm.us

20070053216 - Three-phase low noise charge pump and method: A low noise charge pump circuit includes a first terminal of a first flying capacitor selectively coupled to a first voltage during a first recharging phase and a second terminal of the first flying capacitor selectively coupled to a second voltage during the first recharging phase. The second terminal of... Agent: Texas Instruments Incorporated

20070053217 - Converter for automotive use: A step down voltage converter for automotive electrical power supply networks reduces voltage down at least one order, for example, 42V down to 3V or lower, for the supply of microcontrollers and semiconductors. A preferred embodiment employs a tapped-inductor and three discrete components. The use of tapped-inductor is well-known and... Agent: Brooks Kushman P.c. / Lear Corporation

20070047266 - Switching power supply unit: A switching power supply unit capable of simplifying its structure by reducing the number of parts for wiring is provided. A rectifier circuit has a diode inserted between a first secondary winding and a second secondary winding to form a series circuit therewith, and a diode inserted between a third... Agent: Oliff & Berridge, PLC

20070047267 - Electric power converter: A control circuit for controlling a subsidiary (high-side) switching device in an insulating electric power converter having a half-bridge structure includes a first series circuit of a resistor and a diode, a second series circuit of a resistor and a diode, and a transistor. The control circuit turns the subsidiary... Agent: Rabin & Berdo, PC

20070047268 - 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 method for regulating an output level at a power converter output includes receiving a feedback signal representative of the output level at the power converter output. In response to a state of the... Agent: Blakely Sokoloff Taylor & Zafman

20070047269 - Output voltage detection circuit, isolated switching power supply, and semiconductor device: An output voltage detection circuit is provided for accurately detecting a secondary side output voltage based on a voltage induced to an auxiliary winding in an isolated switching power supply including a transformer having the auxiliary winding. A voltage waveform processing circuit (10-1) processes the waveform of the voltage induced... Agent: Steptoe & Johnson LLP

20070047270 - Load detector for an ac-ac power supply: There is provided a load detector for determining whether a load is connected to an AC-AC power supply. The power supply comprises a transformer having a primary winding and a secondary winding, the primary winding being coupleable to an AC voltage supply via a switch, and the secondary winding being... Agent: Creative Labs, Inc. Legal Department

20070047271 - High-frequency power apparatus: A high-frequency power apparatus including: an oscillator, outputting an oscillating signal, an output level of the oscillating signal being variable; an amplifier, amplifying the oscillating signal output from the oscillator and outputting high-frequency power; a DC power supply, supplying DC power to the amplifier, an output level of the DC... Agent: Greenblum & Bernstein, P.L.C

20070047272 - Pulse width modulation frequency dithering in a switch mode power supply: A switch mode power supply has pulse width modulation (PWM) frequency dithering of a PWM clock frequency. The PWM frequency dithering circuit may change the frequency of the PWM clock based upon each of a plurality of frequencies. A PWM time base circuit may comprise a period register containing a... Agent: Baker Botts, LLP

20070047273 - Switching power supply apparatus: A switching power supply apparatus comprising: a first transformer, one end of a primary winding thereof being connected to one end of a secondary winding of a converter transformer; a second transformer, one end of a primary winding thereof being connected to another end of the secondary winding of the... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070047274 - Power supplying apparatus and power supplying method: A power supply operable from a plurality of alternating current inputs had having protection from abnormal operation. The power supply includes a switchable rectifier and a voltage to voltage converter. Protection circuits switch off at least one of the rectifier and the converter if the rectified voltage exceeds a predetermined... Agent: Stein, Mcewen & Bui, LLP

20070047275 - Bipolar power supply with lossless snubber: In one aspect of the invention, an isolated power converter suitable for high power and high voltage applications comprises stacked rectifiers and lossless snubber circuits with inductors that prevent snubber diodes from delivering large current pulses into output filter capacitors when the duty cycle of the inverter is low, thereby... Agent: John D. Pirnot Advanced Energy Industries, Inc.

20070047276 - Power supply topologies for inverter operations and power factor correction operations: A method according to one embodiment may include generating, by a controller, a plurality of control signals to control operations of inverter circuitry to generate an AC signal from a DC signal. The method of this embodiment may also include using the control signals generated by the controller to also... Agent: Edmund P. Pfleger Grossman, Tucker, Perreault & Pfleger, PLLC

20070047277 - Transformerless power conversion circuit for grid-connected power generation systems: A transformerless power conversion circuit is interconnected with an electric grid and converts an input DC power provided by a power generator into an AC power and feeding the AC power into the grid. The power conversion circuit includes a buck-boost converter converting the input DC power into two sets... Agent: Birch Stewart Kolasch & Birch

20070047278 - Wiring board, electronic device, and power supply unit: A wiring board (lead frame) has a configuration in which a high-frequency current suppression member formed of a conductive soft magnetic film having high magnetic permeability is provided in a near field (magnetic field dominant area) in a lead frame part (wiring part) which can be a radiation noise source,... Agent: Foley And Lardner LLP Suite 500