Electric power conversion systems inventions 12/08

20080316773 - High voltage power supply for static neutralizers: A high voltage power supply for a static neutralizer is disclosed. The high voltage power supply includes a resonant converter and a load with an emitter module having an emitter, reference electrode, and a capacitance value. The resonant converter is disposed to have a resonant frequency and an output coupled... Agent: Uriarte Law

20080316774 - Power supply unit: A power supply unit that allows a main battery and an auxiliary battery to be charged by a system power supply is disclosed. The first and second bridge circuits of the power supply unit are each formed of four switching elements. The transformer of the power supply unit has a... Agent: Woodcock Washburn LLP

20080316775 - Soft-switching circuit for power supply: A soft-switching circuit for a power supply comprises a bridgeless rectifier circuit and an auxiliary circuit. The auxiliary circuit is connected to the bridgeless rectifier circuit, which comprises at least one filtering inductor, two main switches, two diodes and a capacitor. The filtering inductor is connected to the first diode.... Agent: Troxell Law Office PLLC

20080316776 - Resonant-type switching power supply device: There is provided a switching power supply device having one half-wave rectifying circuit made up of switching elements complementarily turned on or off, a reactor, a current resonance capacitor, a transformer, and a rectifying diode and another half-wave rectifying circuit made up of switching elements complementarily turned on or off,... Agent: Townsend And Townsend And Crew, LLP

20080316777 - Method for thermal protection of frequency converter and a frequency converter: A method for thermal protection of a frequency converter and a frequency converter that comprises means for controlling the output current of the frequency converter. The method comprises the steps of determining beforehand two or more data points which define a thermal current limit for a semiconductor component of the... Agent: Buchanan, Ingersoll & Rooney PC

20080316778 - 7-level wye-connected h-bridge converter topology for powering a high-speed electric motor: A 7-level wye-connected H-bridge converter that provides redundancy for continued operation when one bridge phase has failed and more particularly to a topology that includes multiple semiconductor H-bridges and a three-phase semiconductor mid-bridge. The converter may continue operation with failure of any bridge, as a three-phase, wye-connected H-bridge by bypassing... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20080316779 - System and method for estimating input power for a power processing circuit: A controller for a power processing circuit and a related method of operating the same. In one embodiment, the controller includes a multiplier configured to produce a product of an input current and an input voltage of the power processing circuit. The controller also includes a low-pass filter configured to... Agent: Slater & Matsil, L.L.P.

20080316780 - Limitation of voltage pulse: Method and arrangement for controlling the output voltage pulses of a PWM frequency converter, in which PWM frequency converter is a network bridge (10) for rectifying the alternating voltage of the supply network into the DC voltage (UDC) of the DC intermediate circuit, which is filtered with a filtering capacitor... Agent: Birch Stewart Kolasch & Birch

20080316781 - Buck converter led driver circuit: A buck converter LED driver circuit is provided. The driver circuit includes a buck power stage, a rectified AC voltage source, a voltage waveform sampler, and a control circuit. The buck power stage includes at least one LED and provides a first signal directly proportional to the current through the... Agent: J C Patents, Inc.

20080316782 - System and method for producting anharmonic multi-phase currents: A system and method for producing anharmonic multi-phase currents wherein the harmonic component of an inverter is filtered and superimposed with a series of control pulses to create a control signal. The control signal is fed back to the inverter, causing the inverter to produce anharmonic multi-phase currents.... Agent: Greenberg Traurig, LLP

20080316783 - Interleaved power factor correction pre-regulator phase management circuitry: Methods for power factor correction (PFC) and for reducing conduction losses and switching losses in a power converter as well as the power converter and phase management circuitry for the power converter. The power converter includes a first PFC pre-regulator interleaved with at least one additional PFC pre-regulator, and a... Agent: Texas Instruments Incorporated

20080316784 - Isolated radiation hardened electronics on/off control circuit: An isolated ground on/off control circuit includes a first transformer amplifying an AC input voltage, a second transformer connected in parallel to the first transformer; and output circuitry that rectifies the AC input voltage to an isolated DC output voltage. The on/off control circuit may provide improved redundant operation by... Agent: Honeywell International Inc.

20080316785 - Power source apparatus: A power source apparatus has a series circuit connected between output terminals of a DC power source, the series circuit including a primary winding of a transformer and a switching element; a controller configured to control an ON/OFF operation of the switching element; and an output diode connected between terminals... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080316786 - Cooling-fin mounted rectifier for vehicular ac generators: A rectifier for an alternating current generator is provided. The rectifier comprise a plurality of high-side rectifying elements and a plurality of low-side rectifying elements. The high-side rectifying elements are held by a plurality of high-side cooling fins, while the high-side rectifying elements are held by a plurality of low-side... Agent: Oliff & Berridge, PLC

20080310189 - Intergrated power converter and gate driver circuit: A gate driver circuit arranged to supply a DC/DC converter with a switching voltage. Both the gate driver circuit and the DC/DC converter include at least one transistor and at least one further component. The DC/DC converter is arranged to convert an input voltage to an output voltage and to... Agent: Venable LLP

20080310190 - Power converter employing integrated magnetics with a current multiplier rectifier and method of operating the same: A power converter having input and output nodes and a method of operating the same. In one embodiment, the power converter includes a switching circuit including first, second and third active phase legs. Each of the first, second and third active legs includes a first switch coupled to one of... Agent: Slater & Matsil, L.L.P.

20080310191 - Method and system for pulse frequency modulated switching mode power supplies: A pulse frequency modulation (PFM) controller for controlling a switching mode power supply. The controller includes an output terminal for providing a control signal to turn on and off a current in the power supply to regulate an output of the power supply. A first input terminal receives a feedback... Agent: Townsend And Townsend And Crew, LLP

20080310192 - Output power limit for a switching mode power converter by a current limit signal having a multi-slope waveform: A current limit signal having a multi-slope waveform is provided for a power converter that has a power switch switched to convert an input voltage to an output voltage, for output power control more preciously. The current flowing through the power switch has a maximum value being a function of... Agent: Rosenberg, Klein & Lee

20080310194 - Method and apparatus for improving the light load efficiency of a switching mode converter: A method and apparatus are provided for a switching mode converter to improve the light load efficiency thereof. The converter is thus operated with three modes by monitoring a feedback signal and a supply voltage. When the feedback signal indicates that loading gets light enough, the converter is switched from... Agent: Rosenberg, Klein & Lee

20080310193 - Pwm controller for compensating a maximum output power of a power converter: A PWM controller having an oscillator, a control circuit and a two-level limiter is provided. The oscillator generates a pulse signal. The control circuit couples to the oscillator for generating a PWM signal in response to the pulse signal, wherein the PWM signal controls a power switch. The two-level limiter... Agent: Hdsl

20080310195 - Bidirectional dc to dc converter for power storage control in a power scavenging application: A bidirectional DC to DC converter having a first operational mode and a second operational mode includes a first terminal pair that has a positive terminal and a negative terminal and that connects the converter to a first electric circuit, a second terminal pair that has a positive terminal and... Agent: Marshall, Gerstein & Borun LLP (fisher)

20080310196 - Method for controlling startup cycle and circuit of using the same: The present invention discloses a method and a circuit for controlling a start-up cycle of an integrated circuit in a circuit system. The method and circuit determine whether or not an input power of the circuit system and a bias voltage power of the integrated circuit have reached a normal... Agent: Joe Mckinney Muncy

20080310197 - Power supply input device: A power supply input device including a first resistance of a discharge resistance conversion unit connected in parallel to a discharge resistance unit; and a switching unit of the discharge resistance conversion unit connected to the first resistance and performing a switching operation according to an externally received control signal,... Agent: Stein, Mcewen & Bui, LLP

20080310198 - Apparatus and method for suppressing the input current inrush for a voltage converter in a pre-charge stage: An apparatus and method are provided for suppressing the input current inrush for a voltage converter in a pre-charge stage. The voltage converter comprises a power input for receiving an input current, a power output for supplying an output voltage for a load, and an output capacitor connected to the... Agent: Rosenberg, Klein & Lee

20080310199 - Power supply protection apparatus and related method: A power supply protection method for a power supply device includes: detecting whether an output voltage of the power supply device reaches a voltage protection threshold to generate a detection result; generating a first control signal according to a power good input signal and the detection result; utilizing a fault... Agent: North America Intellectual Property Corporation

20080310200 - Multi-phase modulator: An architecture is described for digital multi-phase modulators (MPM) that leads to an efficient, high performance hardware realization. The combined modulator, switching phases and output filter can be viewed as a multi-level digital to analog converter with high power output, or a power D/A, and concepts used in D/A converters... Agent: Hensley Kim & Holzer, LLC

20080310201 - Digital power factor correction: A digital PFC (DPFC) control approach that requires no input voltage sensing or current loop compensation is described. The approach can provide stable, low-harmonic operation over a universal input voltage range and load ranging from high-load operation in continuous conduction mode down to near-zero load. A fast voltage loop can... Agent: Hensley Kim & Holzer, LLC

20080310202 - Method for automatic adjustment of the mains-system frequency parameter of a frequency converter which is connected to a mains system: The invention relates to a method for automatically recognizing a value of the parameter network frequency of a frequency converter connected to a network. According to the invention, the curve of a measured intermediate circuit voltage of the frequency converter is analyzed in order to verify if the network is... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080310203 - Method and apparatus to provide synchronous rectifying circuit for offline power converters: A synchronous rectifying circuit is provided for power converter. A pulse signal generator is utilized to generate a pulse signal in response to the leading edge and the trailing edge of a switching signal. The switching signal is used for switching the transformer of the power converter. An isolation device... Agent: J C Patents, Inc.

20080310204 - Close control of electric power converters: The invention relates to a close control of electric power converters. It comprises: a diode D1 in parallel with a switch I1, a diode D2 in parallel with a switch I2, and a transformer (T1). The switches (I1, I2) are controlled, cyclically repeating the following stages: At a time T0... Agent: Lowe Hauptman & Berner, LLP

20080310205 - Method for controlling a polyphase converter with distributed energy stores: The invention relates to a method for controlling a power converter comprising at least two phase modules, each of which is provided with an upper and a lower valve leg that is equipped with at least two serially connected bipolar subsystems, respectively. According to the invention, the switching actions in... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080310206 - Method for controlling frequency converter unit, and frequency converter assembly: A method for controlling a frequency converter unit, the frequency converter unit containing an input connection for supplying electric power at an input frequency to the frequency converter unit, and an output connection for supplying electric power at an output frequency from the frequency converter unit, the method comprising a... Agent: Buchanan, Ingersoll & Rooney PC

20080304290 - Miniature high-voltage power supplies: The present invention provides miniature power supplies and circuitry for powering high-voltage devices.... Agent: Levine Bagade Han LLP

20080304291 - Switched mode power converter and method of operation thereof: A switched mode power converter is provided which includes a transformer (2) having a primary winding (2a) and at least one secondary winding (2b); a primary side active switch device (S1) coupled to the primary winding for selectively applying an input voltage to the primary winding; and a secondary side... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080304292 - Isolated high power bi-directional dc-dc converter: A bi-directional dc-dc converter is provided that may provide voltage conversion for two separate electrical power systems. The two electrical power systems may have different functions, electrical requirements and power transfer directions. The bi-directional dc-dc converter may include back-to-back bi-directional dc-dc converter circuits isolated from each other by a transformer.... Agent: Honeywell International Inc.

20080304293 - Converter controller: A converter controller is disclosed. In one embodiment, a controller for a flyback converter includes a converter and a flyback controller. The converter is coupled to the flyback converter for receiving an auxiliary voltage and for generating a constant power voltage. The flyback controller is powered by the constant power... Agent: O2micro Inc C/o Murabito, Hao & Barnes LLP

20080304294 - Power supply for relieving spikes: In a feedback circuit of a power supply, an electrical level of an output voltage is stabilized corresponding to changes of an electrical level of a pulse width modulation signal, and effects, which are caused by spikes, on passive elements are decreased to a lowest degree. The electrical level of... Agent: North America Intellectual Property Corporation

20080304295 - Switching power converter with a secondary-side control: This invention discloses a power converter with a secondary-side control, including an input circuit with one or more switches, an output circuit with an output end and a controller, and a transformer with a primary-side coil assembly connecting the switch(es) and a secondary-side coil assembly connecting the output circuit. The... Agent: Dr. Banger Shia Int''l Patent Office Of Bang Shia

20080304296 - Dc-dc and dc-ac power conversion system: A galvanic isolated DC-DC and DC-AC power conversion system is coupled to a plurality of DC sources which are derived from a combination of a plurality of single-phase and three-phase AC-DC converters. The DC-DC and DC-AC power conversion system in one embodiment is configured to provide mixed type outputs (mixed... Agent: General Electric Company Global Research

20080304297 - Switching power supply with protection function: A switching power supply with protection function includes a transistor controlled to be on or off by a PWM signal from a PWM controller to convert a DC voltage into a square wave signal, a filter filtering the square wave signal into an output voltage signal, the output voltage signal... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang

20080304298 - System interconnection inverter: A system interconnection inverter includes a step-up converter and an inverter. Moreover, the system interconnection inverter includes a short-circuit current-interrupting diode with a cathode connected to an input terminal of a negative bus, a semiconductor switch connected to an anode of the short-circuit current-interrupting diode, a semiconductor switch drive circuit... Agent: Buchanan, Ingersoll & Rooney PC

20080304299 - Low voltage led drive from 120vac line: A highly efficient DC power supply is converted directly off-line from an A.C. or DC voltage source to have output current or voltage regulation from a low level approaching zero, up to the level of maximum capacity and has a DC power supply voltage and a DC voltage source for... Agent: John F. Bryan

20080304300 - Power conversion system with galvanically isolated high frequency link: A power conversion system has a three-phase AC input, where each AC input phase is linked to a string of cascaded single-phase AC-DC converters placed in series with a three-phase AC-DC converter. Each single-phase AC-DC converter in one embodiment includes a silicon carbide (SiC) pulse width modulated MOSFET H-bridge that... Agent: General Electric Company Global Research

20080304301 - Power converting apparatus for system connection: A grounding wire from a commercial power system is connected to a series-connection end of a series connection between two capacitors connected in series between a positive electrode and a negative electrode. A current detector monitors an output current of an inverter unit in which four switching elements and two... Agent: Buchanan, Ingersoll & Rooney PC

20080304302 - Systems and methods for controlling a converter for powering a load: Systems and methods for controlling a converter for powering a load are provided. According to one embodiment of the invention, a method for powering a load is provided. A power converter may be provided. At least one gating control signal having a switching pattern may be supplied to the power... Agent: Sutherland Asbill & Brennan LLP

20080304303 - Power converting device: A power converting device includes a power converting unit for converting an AC voltage input into a DC voltage output, a cooling fan for dissipating heat generated by the power converting unit, a detecting unit connected electrically to the power converting unit for detecting a current output of the power... Agent: Brooks Kushman P.C.

20080304304 - Composite connection port device: A composite port connection device, and is provided with a plurality sets of connection ports for the user to connect them to various types of electronic devices. The connection ports include power output port and data transmission port. The major function of the invention is that, upon receiving the local... Agent: Dr. Banger Shia

20080304305 - Boost converter with integrated high power discrete fet and low voltage controller: A boost converter for high power and high output voltage applications includes a low voltage controller integrated circuit and a high voltage, vertical, discrete field effect transistor, both of which are packed in a single package.... Agent: Joshua D. Isenberg Jdi Patent

20080304306 - High voltage and high power boost conveter with co-packaged schottky diode: A high voltage and high power boost converter is disclosed. The boost converter includes a boost converter IC and a discrete Schottky diode, both of which are co-packaged on a standard single common die pad.... Agent: Joshua D. Isenberg Jdi Patent

20080298087 - Switching sequence control method for a ps-zvt bridge converter: The switching sequence of a phase-shifted zero-voltage-transition (PS-ZVT) full bridge converter circuit is alternated between two modes by periodically reversing the switching sequence for diagonally opposed switching devices of the bridge. Over a period of operation, each of the switching devices periodically conduct the entire free-wheeling current that occurs during... Agent: Delphi Technologies, Inc.

20080298088 - Dc to dc converter with load open detection and related method thereof: Disclosed is a DC to DC converter, which comprises: a transforming circuit, for transforming an input voltage to an output voltage; a comparator, for comparing a reference voltage and a feedback voltage proportional to the output voltage to generate a comparing signal; a control circuit, coupled to the transforming circuit... Agent: North America Intellectual Property Corporation

20080298092 - Control circuit and method for controlling switching power supply: Control circuit and method for controlling a switching power supply, which regulates its output voltage using pulse-width modulation (PWM) that switches on and off a main switch with a PWM signal (VCONT) at an adjusted ON-period ratio of the main switch. The control circuit includes an error signal amplifier circuit... Agent: Rabin & Berdo, PC

20080298089 - Converter circuit with forward and backward control: The present invention relates to a converter circuit and a conversion method for converting an input signal of a first value to an output signal of a second value based on a switched operating mode, wherein an output feedback loop (40) and an additional input forward control loop (60) are... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080298090 - Digital constant on-time power supply control: A switched voltage regulator provides improved regulation at a lower clock rate/sampling frequency (e.g. several orders of magnitude lower than would be required for comparable regulation) while using a low resolution digital pulse width modulator such that limit cycle oscillations occur (and thus of low cost and complexity and small... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20080298093 - Multiphase resonant converter for dc-dc applications: The various embodiments and example provided herein are generally directed to novel multiphase resonant converters. In an embodiment, a multiphase resonant converter comprises N unit resonant converters having inputs and outputs connected in parallel, respectively. Each unit converter comprises an inverter, a LLC series resonant tank, and a rectifier. In... Agent: Orrick, Herrington & Sutcliffe LLP

20080298091 - Image forming apparatus: The present invention can include an image forming apparatus having an electrical load, a supplying circuit configured to supply an electrical power to the electrical load, and an output circuit configured to output a voltage according to a current value of the electrical power being supplied to the electrical load.... Agent: Banner & Witcoff, Ltd. Attorneys For Client Nos. 0166889, 006760

20080298095 - Light-load efficiency improving method and apparatus for a flyback converter: A flyback converter has a controller to switch a power switch so as to convert an input voltage to an output voltage for a load by monitoring an output voltage dependent signal and a current sensing signal derived from a current flowing through the power switch, a light-load efficiency improving... Agent: Rosenberg, Klein & Lee

20080298094 - Method and apparatus to control two regulated outputs of a flyback power supply: A flyback power supply method and apparatus is disclosed. An apparatus according to aspects of the present invention includes an energy transfer element having a primary winding and first and second output windings. The first and second output windings are coupled to produce first and second output values, respectively. A... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080298096 - Dual voltage wye-connected h-bridge converter topology for powering a high-speed electric motor: A topology for a three-phase, wye-connected H-bridge converter allowing continued operation when one H-bridge phase has failed by bypassing the failed H-bridge, increasing dc-bus voltage to provide the required output load voltage, and decreasing switching frequency to reduce power losses in semiconductor switches. In normal operation, the dc-bus voltage is... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20080298097 - System and method for precharging passive harmonic filters: A system and method for precharging a harmonic filter connected to a power supply line to receive AC power and deliver the AC power to the motor drive unit includes a control circuit. The control circuit is configured to monitor an operational state of the motor drive unit or the... Agent: Rockwell Automation, Inc./(qb)

20080298098 - Zero-current notch waveform for control of a three-phase, wye-connected h-bridge converter for powering a high-speed electric motor: A zero-current, synchronous switching waveform is provided for a three-phase, wye-connected H-Bridge to power an electric motor. The switching waveform includes two notches per cycle on the switching waveform provided to each of the semiconductor switches to minimize total harmonic distortion and switching loss. Positioning of the notch with respect... Agent: Ge Energy General Electric C/o Ernest G. Cusick

20080298099 - Apparatus and method for reducing the die area of a pwm controller: An apparatus and method for reducing the die area of a PWM controller include a protection circuit triggered by a fault index signal for counting, and the counting time is provided for a delay time required by fault verification. Therefore, fault detection circuits can be eliminated and the purpose of... Agent: Rosenberg, Klein & Lee

20080298100 - Contactless power receiving unit and electronic device employing the same: Provided is a contactless power receiving unit which has a simple configuration, and which is capable of generating constant induced electromotive force regardless of the orientation of a power receiving coil. Multiple power receiving coils are arranged to form certain relative angles to one another in a parallel magnetic field... Agent: Mots Law, PLLC

20080298101 - Intelligent dead time control: A circuit for reducing switching losses in a synchronous rectifier of a switching stage including a high-side control transistor and a low-side synchronous transistor coupled at a switching node, the switching stage receiving an input voltage and providing a controlled output voltage at an output node. The circuit including a... Agent: Ostrolenk Faber Gerb & Soffen

20080298103 - Four pole neutral-point clamped three phase converter with low common mode voltage output: A four pole, three-phase, NPC converter that produces virtually no common mode voltage. The low common mode voltage output is achieved by constraining the switch states of the NPC converter. A fourth pole and associated control balance the upper and lower DC link voltages. The converter may be an inverter... Agent: Sonnenschein Nath & Rosenthal LLP

20080298102 - Power converter with low loss switching: A welding power supply includes an input rectifier that receives sinusoidal or alternating line voltage and provides a rectified voltage. A pre-regulator provides a dc bus and a convertor, such as a boost convertor, provides a welding output. The pre-regulator is an SVT (slow voltage transition) and an SCT (slow... Agent: Corrigan Law Office

20080298104 - Prediction scheme for step wave power converter and inductive inverter topology: w

20080298105 - Switching power supply system: A switching power supply system, in which a DC voltage obtained by full-wave rectification of an AC voltage is turned on and off by a switching device, converted to a desired DC voltage and outputted, includes a slope compensating circuit and an overcurrent protecting circuit, and a full-wave rectified voltage... Agent: Rabin & Berdo, PC

20080298106 - Adaptive rectifier architecture and method for switching regulators: An adjustable compensation offset voltage is applied to a comparator to vary turn-off timing of a synchronous rectifier. A comparator output indicates when current through an inductor coupled to the synchronous rectifier should be approaching zero. If the synchronous rectifier is turned off before the current through the inductor reaches... Agent: Texas Instruments Incorporated

20080298107 - Ac signal producer and method thereof: An AC signal producer comprises a controlling unit, a Class-D switch circuit, and a low-pass filter. The control unit receives a DC signal and produces a PWM control signal via checking reference tables. The Class-D switch circuit receives the PWM control signal and outputs a square-wave signal. The low-pass filter... Agent: Rosenberg, Klein & Lee

20080298108 - Component construction with switching power supply actuates module and application concept: A component construction with switching power supply actuates module use for stabilize voltage on/off to achieve high efficiency energy saving. With the remains of resonance electric wave form drive by vibration to make it not follow the voltage input and the changes of the electric wave load effect to stabilize... Agent: Akerman Senterfitt