Electric power conversion systems inventions 10/08

20080259645 - Converter for an ion propulsion system: A converter includes a converter for an ion propulsion system is provided. The converter includes a bridge circuit with a first and second bridge circuit connection and four switches. The converter also includes a storage inductance and a high voltage transformer with a primary and a secondary winding. The converter... Agent: Crowell & Moring LLP Intellectual Property Group

20080259646 - Dynamic converter topology: Methods and apparatus of dynamic topology power converters are provided. One method includes monitoring at least one variable of the power converter and based on the at least one monitored variable, using a converter topology selected between at least a full-bridge converter topology and a half-bridge converter topology to achieve... Agent: Fogg & Powers LLC

20080259649 - Switched mode power supply comprising a rectifier circuit: The switched mode power supply comprises an inductor, a switching transistor coupled in series with the inductor, and a rectifier circuit. The rectifier circuit comprises a switch coupled with the inductor for a rectification of an output voltage and a control circuit operating in a monostable mode. The switch is... Agent: Joseph J. Laks Thomson Licensing LLC

20080259648 - Switching control in dc-dc-converters: Implementations related to controlling of a switch in a DC-DC converter are presented herein.... Agent: Infineon Technologies Ag Patent Department

20080259647 - Power converter: A power converter comprises a series arrangement of a first main current path of a first controllable switch (M2) and a second main current path of a second controllable switch (M3). The series arrangement is arranged to receive a DC-input voltage (V1). A series arrangement of an inductance (L) and... Agent: Philips Intellectual Property & Standards

20080259650 - Changing switching frequency of a primary side power converter to compensate for inductance variation: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls a switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp time... Agent: Imperium Patent Works

20080259652 - Compensating for base current in a primary side power converter that uses an npn bipolar transistor: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls a switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp time... Agent: Imperium Patent Works

20080259651 - Constant current and voltage controller in a four-pin package with dual-use pin: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls an inductor switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp... Agent: Imperium Patent Works

20080259653 - Method and apparatus for conditional response to a fault condition in a switching power supply: Techniques are disclosed to regulate an output of a power converter. One example power converter controller circuit includes a line sense input to be coupled to receive a signal representative of an input voltage of a power converter. A feedback input to be coupled to receive a feedback signal representative... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080259654 - Compensating for cord resistance to maintain constant voltage at the end of a power converter cord: A cord correction circuit in a primary-side-controlled flyback converter compensates for the loss of output voltage caused by the resistance of the charger cord. In one embodiment, a correction voltage is subtracted from a feedback voltage received from a primary-side auxiliary inductor. A pre-amplifier then compares a reference voltage to... Agent: Imperium Patent Works

20080259656 - Regulating output current from a primary side power converter by clamping an error signal: An inductor current flows through an inductor of a flyback converter. In a constant voltage mode, the pulse width of an inductor switch control signal is adjusted to maintain a constant output voltage of the flyback converter. The inductor switch control signal controls a switch through which the inductor current... Agent: Imperium Patent Works

20080259655 - Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback control: A pulse-width-modulation control circuit of a switching-mode power converter with a primary-side feedback control is disclosed. The switching-mode power converter includes a transformer, a power switch, a current sensing resistor and the pulse-width-modulation control circuit. The transformer includes a primary-side winding, a secondary-side winding and an auxiliary winding. The pulse-width-modulation... Agent: North America Intellectual Property Corporation

20080259657 - Boosting technique for a bi-directional switch in a power converter: A bi-directional switch for a power converter comprises first and second transistors (SW1, SW2) and a floating supply capacitor (C2) associated with the second transistor (SW2). The drive circuit and/or gate of the first transistor (SW1) is charged by the floating supply capacitor (C2) of the second transistor (SW2). The... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080259658 - Limit for the harmonics of a current: b

20080259659 - Overload and short protected soft-start converter: A converter and a driving method thereof are provided. The converter can determine the output short state of the converter after the soft start is finished by using a detection signal that corresponds to an input signal while a switched is turned on and that corresponds to an output signal... Agent: Sidley Austin LLP

20080259660 - Power conditioner and method of operating the same: A power conditioner for supplying controlled power generated from a power source such as a fuel cell or a solar battery to a load. The power conditioner includes a main converter converting the output voltage of the power source; an auxiliary converter converting the output voltage of the main converter... Agent: Stein, Mcewen & Bui, LLP

20080259661 - Control process for redundancy use in the event of a fault of a polyphase power converter having distributed energy stores: The invention relates to a method for controlling a power converter having at least two phase modules, which each have an upper and a lower valve branch, each having at least three series-connected two-pole subsystems, in the event of failure of at least one subsystem of a valve branch of... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080259662 - Ac power supply and method for controlling output current thereof: An AC power supply and a method for dynamically controlling the output current thereof are disclosed. An output voltage stop signal is used to disable a DC/AC converter from outputting. During a period that the DC/AC converter stops its output, the output current of the DC/AC converter is measured and... Agent: Jackson Walker, L.L.P.

20080259663 - Methods and apparatus for three-phase rectifier with lower voltage switches: Methods and apparatus to provide a rectifier having a high power factor not limited by voltage ratings of switching devices. Methods and apparatus can include pairs of series-coupled switches coupled to a respective phase signal to, along with respective diode pairs, apportion voltage over a series of load capacitors coupled... Agent: Raytheon Company C/o Daly, Crowley, Mofford & Durkee, LLP

20080259664 - Network transmit/receive port: A network transmit/receive port, including transformers, a rectifying unit, a powered device controller unit, and a DC-DC converter controller, is provided. Each circuit unit is integrated in a network transmit/receive port of an Ethernet power sourcing/powered device, so as to reduce the volume of externally-connected circuits, which thus further satisfies... Agent: Rabin & Berdo, PC

20080259665 - Rectifier circuit, circuit arrangement and method for manufactiring a rectifier circuit: One aspect of the invention relates to a rectifier circuit for providing a rectified voltage, with a first AC voltage terminal to which an AC voltage can be applied, with a first DC voltage terminal to which a DC voltage can be provided, and with a control switching element between... Agent: Dicke, Billig & Czaja

20080259666 - Power unit: The invention makes it possible to secure a maximum output within the capacity range of an electrical power source by preventing an output from being cut by a protective function of a converter at the time of a temporary overload. A bidirectional DC-DC converter 4 for stepping up a voltage... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080259645 - Converter for an ion propulsion system: A converter includes a converter for an ion propulsion system is provided. The converter includes a bridge circuit with a first and second bridge circuit connection and four switches. The converter also includes a storage inductance and a high voltage transformer with a primary and a secondary winding. The converter... Agent: Crowell & Moring LLP Intellectual Property Group

20080259646 - Dynamic converter topology: Methods and apparatus of dynamic topology power converters are provided. One method includes monitoring at least one variable of the power converter and based on the at least one monitored variable, using a converter topology selected between at least a full-bridge converter topology and a half-bridge converter topology to achieve... Agent: Fogg & Powers LLC

20080259649 - Switched mode power supply comprising a rectifier circuit: The switched mode power supply comprises an inductor, a switching transistor coupled in series with the inductor, and a rectifier circuit. The rectifier circuit comprises a switch coupled with the inductor for a rectification of an output voltage and a control circuit operating in a monostable mode. The switch is... Agent: Joseph J. Laks Thomson Licensing LLC

20080259648 - Switching control in dc-dc-converters: Implementations related to controlling of a switch in a DC-DC converter are presented herein.... Agent: Infineon Technologies Ag Patent Department

20080259647 - Power converter: A power converter comprises a series arrangement of a first main current path of a first controllable switch (M2) and a second main current path of a second controllable switch (M3). The series arrangement is arranged to receive a DC-input voltage (V1). A series arrangement of an inductance (L) and... Agent: Philips Intellectual Property & Standards

20080259650 - Changing switching frequency of a primary side power converter to compensate for inductance variation: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls a switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp time... Agent: Imperium Patent Works

20080259652 - Compensating for base current in a primary side power converter that uses an npn bipolar transistor: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls a switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp time... Agent: Imperium Patent Works

20080259651 - Constant current and voltage controller in a four-pin package with dual-use pin: A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls an inductor switch through which the inductor current flows. The inductor current increases at a ramp-up rate during a ramp... Agent: Imperium Patent Works

20080259653 - Method and apparatus for conditional response to a fault condition in a switching power supply: Techniques are disclosed to regulate an output of a power converter. One example power converter controller circuit includes a line sense input to be coupled to receive a signal representative of an input voltage of a power converter. A feedback input to be coupled to receive a feedback signal representative... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080259654 - Compensating for cord resistance to maintain constant voltage at the end of a power converter cord: A cord correction circuit in a primary-side-controlled flyback converter compensates for the loss of output voltage caused by the resistance of the charger cord. In one embodiment, a correction voltage is subtracted from a feedback voltage received from a primary-side auxiliary inductor. A pre-amplifier then compares a reference voltage to... Agent: Imperium Patent Works

20080259656 - Regulating output current from a primary side power converter by clamping an error signal: An inductor current flows through an inductor of a flyback converter. In a constant voltage mode, the pulse width of an inductor switch control signal is adjusted to maintain a constant output voltage of the flyback converter. The inductor switch control signal controls a switch through which the inductor current... Agent: Imperium Patent Works

20080259655 - Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback control: A pulse-width-modulation control circuit of a switching-mode power converter with a primary-side feedback control is disclosed. The switching-mode power converter includes a transformer, a power switch, a current sensing resistor and the pulse-width-modulation control circuit. The transformer includes a primary-side winding, a secondary-side winding and an auxiliary winding. The pulse-width-modulation... Agent: North America Intellectual Property Corporation

20080259657 - Boosting technique for a bi-directional switch in a power converter: A bi-directional switch for a power converter comprises first and second transistors (SW1, SW2) and a floating supply capacitor (C2) associated with the second transistor (SW2). The drive circuit and/or gate of the first transistor (SW1) is charged by the floating supply capacitor (C2) of the second transistor (SW2). The... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080259658 - Limit for the harmonics of a current: b

20080259659 - Overload and short protected soft-start converter: A converter and a driving method thereof are provided. The converter can determine the output short state of the converter after the soft start is finished by using a detection signal that corresponds to an input signal while a switched is turned on and that corresponds to an output signal... Agent: Sidley Austin LLP

20080259660 - Power conditioner and method of operating the same: A power conditioner for supplying controlled power generated from a power source such as a fuel cell or a solar battery to a load. The power conditioner includes a main converter converting the output voltage of the power source; an auxiliary converter converting the output voltage of the main converter... Agent: Stein, Mcewen & Bui, LLP

20080259661 - Control process for redundancy use in the event of a fault of a polyphase power converter having distributed energy stores: The invention relates to a method for controlling a power converter having at least two phase modules, which each have an upper and a lower valve branch, each having at least three series-connected two-pole subsystems, in the event of failure of at least one subsystem of a valve branch of... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20080259662 - Ac power supply and method for controlling output current thereof: An AC power supply and a method for dynamically controlling the output current thereof are disclosed. An output voltage stop signal is used to disable a DC/AC converter from outputting. During a period that the DC/AC converter stops its output, the output current of the DC/AC converter is measured and... Agent: Jackson Walker, L.L.P.

20080259663 - Methods and apparatus for three-phase rectifier with lower voltage switches: Methods and apparatus to provide a rectifier having a high power factor not limited by voltage ratings of switching devices. Methods and apparatus can include pairs of series-coupled switches coupled to a respective phase signal to, along with respective diode pairs, apportion voltage over a series of load capacitors coupled... Agent: Raytheon Company C/o Daly, Crowley, Mofford & Durkee, LLP

20080259664 - Network transmit/receive port: A network transmit/receive port, including transformers, a rectifying unit, a powered device controller unit, and a DC-DC converter controller, is provided. Each circuit unit is integrated in a network transmit/receive port of an Ethernet power sourcing/powered device, so as to reduce the volume of externally-connected circuits, which thus further satisfies... Agent: Rabin & Berdo, PC

20080259665 - Rectifier circuit, circuit arrangement and method for manufactiring a rectifier circuit: One aspect of the invention relates to a rectifier circuit for providing a rectified voltage, with a first AC voltage terminal to which an AC voltage can be applied, with a first DC voltage terminal to which a DC voltage can be provided, and with a control switching element between... Agent: Dicke, Billig & Czaja

20080259666 - Power unit: The invention makes it possible to secure a maximum output within the capacity range of an electrical power source by preventing an output from being cut by a protective function of a converter at the time of a temporary overload. A bidirectional DC-DC converter 4 for stepping up a voltage... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080253149 - Composite transformer and insulated switching power source device: An E-shaped transformer core has a middle leg and one pair of outer legs and on opposite sides with respect to the middle leg. A first pair of coils including at least two coils are wound around the middle leg so that a power transmission transformer unit is formed. The... Agent: Ostrolenk Faber Gerb & Soffen

20080253150 - Flyback converter providing simplified control of rectifier mosfets when utilizing both stacked secondary windings and synchronous rectification: The present invention provides methods and systems for a flyback converter arranged with synchronous rectifier MOSFETS in such a manner that they operate with a common source potential while still providing for the use of a stacked output winding. With a common source potential, a single rectifier control voltage can... Agent: Clements Bernard Miller

20080253151 - Method and apparatus to reduce dynamic rdson in a power switching circuit having a iii-nitride device: A method of preventing the Rdson of a III-V Nitride power switching circuit from varying over time. The method includes biasing the switch to a pre-bias voltage level just below turn ON when the switch is OFF, wherein traps are discharged when the switch is biased to the pre-bias voltage... Agent: Ostrolenk Faber Gerb & Soffen

20080253152 - Method for reducing body diode conduction in nmos synchronous rectifiers: A switching regulator that practices the current invention includes a high-side switch M1 connected between an input voltage and a node Lx. A low-side switch is connected between the node Lx and ground. An inductor L is connected between Lx and an output node (VOUT). A filtering capacitor connects VOUT... Agent: Advanced Analogic Technologies

20080253153 - Active power conditioner: An active power conditioner includes a first power electronic switch set, a second power electronic switch set, a third power electronic switch set, an input filter and an output filter. The active power conditioner can supply a stable AC voltage to a load when a voltage variation is occurred at... Agent: Kamrath & Associates P.A.

20080253154 - Inrush current limiter device and power factor control (pfc) circuit having an improved inrush current limiter device: The present invention relates to an inrush current limiter device (4) for limiting inrushing current to a connectable load (3) comprising: at least one switchable IGBT-based limiter unit (5) for selectively limiting the inrushing current, having at least one current limiting conductor element for a limited leading of current and... Agent: Philips Intellectual Property & Standards

20080253155 - Power supply with current limiting circuits: A power supply (200) is provided having a plurality of independent current limiting circuits. A first current limiting circuit (6) provides protection against a short circuit or other extraneous load conditions, while a second current limiting circuit, using a trace on a PCB as a sensing element, is programmable on... Agent: Richard D. Clarke Law Office Of Richard D. Clarke

20080253156 - Dc/dc power conversion device: A DC/DC power conversion device with smoothing capacitors including three column circuits share the smoothing capacitors to be connected in parallel, each column circuit have a plurality of circuits connected in series where two MOSFETs are connected in series between both ends of respective smoothing capacitors and LC serial bodies... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080253157 - Method for switching low-power using ac and system for performing the same and power supply for using the system: A power control method using AC power, the method being capable of performing: low power control that passes only two portions of positive direction waves of each one-cycle sine wave of the AC power and only two portions of negative direction waves of each one-cycle sine wave of the AC... Agent: Greer, Burns & Crain

20080253158 - Power converter: There are provided: sets of pairs of main circuit switching elements (4u), (4x) that supply power to a load, connected in series with a DC power source; free-wheel diodes (5u), (5x) connected in anti-parallel with these main circuit switching elements; and a reverse voltage application circuit (8) that applies reverse... Agent: Foley And Lardner LLP Suite 500

20080247194 - Resonant converter system and controlling method thereof having relatively better efficiency: The configurations of a resonant converter system and a controlling method thereof are provided. The proposed resonant converter system includes a resonant converter and a hybrid control apparatus coupled to the resonant converter for generating a driving signal to adjust a phase angle and a frequency of the resonant converter... Agent: Volpe And Koenig, P.C.

20080247195 - Dc/dc converter: According to the switching supply such as a DC/DC converter, since primary side coils provided in two transformers are mutually connected in series, voltage variation generated in parallel-connected secondary side coils can be suppressed, and the uniformity of secondary side parallel output can be enhanced even in case of voltage... Agent: Oliff & Berridge, PLC

20080247196 - Switched mode power supply with synchronous rectifier: In a controller (CC2) for controlling a synchronous rectification switch (S2), the controller (CC2) comprises a sensing circuit (SRL) for sensing an output (D2) of the synchronous rectification switch (S2) at an end of a blanking time to obtain a sense signal (Q), and a control signal generating circuit (AND1)... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080247197 - One-way dipolar component with a protection against overcurrent: A one-way dipolar component with overcurrent protection including, in parallel, a first one-way dipolar component with a positive temperature coefficient; and a second one-way dipolar component having the same biasing as the first one-way dipolar component having a conduction threshold voltage greater than the conduction threshold voltage at ambient temperature... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, P.C.

20080247198 - Control circuit and controlling method of switching power supply system: A switching power supply system has a control circuit that controls an output voltage by causing a switching device to turn ON and OFF. The control circuit includes a control pulse supplying unit that supplies a pulsed signal that_keeps the switching device turned-ON and -OFF. A protection circuit shuts down... Agent: Rabin & Berdo, PC

20080247199 - Method and apparatus for power converter fault condition detection: An example controller includes a fault detector and a control. The fault detector is to be coupled to a feedback circuit of a power converter to detect a fault condition in the power converter in response to an input voltage of the power converter. The control is coupled to the... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080247200 - Control method for direct-current transmission by means of a plurality of converters: At least three power converters in a power distribution and power transmission system can be controlled as rectifiers or inverters and are connected together by a direct current network. A measuring direct current voltage and a measuring direct current are measured on each power converter and respectively, transmitted to the... Agent: Lerner Greenberg Stemer LLP

20080247201 - Power-maximizing electrical energy generation system:

20080247202 - Method and apparatus for sensing multiple voltage values from a single terminal of a power converter controller: An example controller for a power converter according to aspects of the present invention includes a switching control that switches a power switch to regulate an output of a power converter. The controller also includes a sensor coupled to receive a signal from a single terminal of the controller. The... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080247203 - Energy efficient power converter: There is disclosed a power supply and method. The power supply may include a power converter for converting AC primary power into DC power, the power converter having a normal operating mode and a low power quiescent operating mode. A DC power plug may be adapted to deliver DC power... Agent: SocalIPLaw Group LLP

20080247204 - Regulator device for a three-phase ac machine: A regulating apparatus for a three-phase AC machine has a DC controller and an inverter. An input of the inverter is coupled to the DC controller and an output of the inverter can be coupled to the AC machine.... Agent: Lerner Greenberg Stemer LLP

20080247205 - Controlling apparatus of an ac led string: The invention relates to a controlling apparatus of an AC LED string, which includes a controller to control the string being capable of flickering or totally unflickering very easily. The apparatus can also connect an adjustable resistance for application on a string with various numbers of LEDs. The apparatus includes... Agent: Rosenberg, Klein & Lee

20080247206 - Energy transfer element and converter including the same: An energy transfer element includes a first winding coupled to an input circuit and a second winding coupled to an output circuit. The first winding has a first unit and a second unit, and the second winding is wound between the first unit of the first winding and the second... Agent: Sidley Austin LLP

20080247207 - System for rectifying and limiting current and reducing voltage: A system for reducing and limiting current and reducing voltage for a light string system. The system includes: an input terminal connected to a rectifying circuit; the rectifying circuit being connected between the input terminal and a voltage-reducing and current-limiting circuit; the voltage-reducing and current-limiting circuit being connected between the... Agent: Troutman Sanders LLP

20080247209 - Integrated synchronous rectifier package: A controller for controlling a controlled switching device functioning as a synchronous rectifier of alternating current, the controller comprising a control circuit for sensing the direction of current through the controlled switching device, the controlled switching device comprising a MOSFET having a conduction channel and a parasitic body diode and... Agent: Ostrolenk Faber Gerb & Soffen

20080247208 - Semiconductor device: A semiconductor device is provided, which comprises a rectifier circuit configured to generate a first voltage from a first signal inputted from an input terminal, a comparing circuit configured to compare a reference voltage and the first voltage inputted from the rectifier circuit and to output a second signal to... Agent: Cook, Alex, Mcfarron, Manzo, Cummings & Mehler, Ltd.

20080247210 - Resonant inverter: A resonant inverter includes inductive elements (L1, L2) that allow the number of magnetic components in the inverter to be reduced. The elements (L1, L2) may be designed with a leakage inductance to eliminate the need for a large DC inductor. They may also perform the function of a current... Agent: Darby & Darby P.C.

20080247211 - Active generator control sequence: A method for operating a matrix converter to convert n phases of a generator into alternating voltage with nr (nr<n) phases of a load connected to a network includes the steps of alternatingly connecting the nr phases of the load using a plurality of controllable bi-directional switches disposed in an... Agent: Darby & Darby P.C.

20080239759 - Dc/dc converter: Primary and secondary coils are provided in the first through section and a coil group is also provided in the second through section. Hence, the surface area over which the coil group extends within a plane which is perpendicular to the through sections is greater than in the case where... Agent: Oliff & Berridge, PLC

20080239760 - Primary only constant voltage/constant current (cvcc) control in quasi resonant convertor: A power supply apparatus and method of regulating is provided. A converter circuit includes a primary switching element and an auxiliary switching element. The auxiliary switching element is for transferring a reflected voltage signal. A transformer includes a primary and a secondary, the primary is coupled with the converter circuit.... Agent: Haverstock & Owens LLP

20080239761 - Forward power converter controllers: A method of controlling a resonant discontinuous forward converter (RDFC), said converter including a transformer with primary and secondary matched polarity windings and a switch to, in operation, cyclically switch DC power to said primary winding of said transformer, said converter further having a DC output coupled to said secondary... Agent: Schwegman, Lundberg & Woessner, P.A.

20080239762 - Forward power converter controllers: A controller for a resonant discontinuous forward converter (RDFC), said converter including a transformer with primary and secondary matched polarity windings and a switch to, in operation, cyclically switch DC power to said primary winding of said transformer, said converter further having a DC output coupled to said secondary winding... Agent: Schwegman, Lundberg & Woessner, P.A.

20080239763 - Method and apparatus for quasi-resonant current mode power conversion: A method and apparatus to magnetically couple AC power from the high voltage electric utility power line current induced magnetic field over a wide voltage and current range to provide a low voltage, low current DC power supply useful in powering other remotely located or limited accessibility circuitry requiring low... Agent: Patent Group C/o Dla Piper US LLP

20080239764 - Forward power converter controllers: A method of controlling a resonant discontinuous forward converter (RDFC), said converter including a transformer with primary and secondary matched polarity windings and a switch to, in operation, cyclically switch DC power to said primary winding of said transformer, said converter further having a DC output coupled to said secondary... Agent: Schwegman, Lundberg & Woessner, P.A.

20080239766 - Control system for a voltage converter and method: A control arrangement (1) for a voltage converter for converting a first DC voltage (UBAT) into a second DC voltage (U-G) comprises a first input (3) that is provided for coupling to a means of sensing a first current (I1) on the primary side of the transformer (11). The output... Agent: Fish & Richardson PC

20080239765 - System and method for a bridgeless power supply: A system and method for a bridgeless power supply is disclosed. The bridgeless power supply includes a digital control module that controls a first switch, a second switch, and a transistor, thereby the bridgeless power supply rectifies an alternating current (AC) variable input voltage and regulates a direct current (DC)... Agent: Larson Newman Abel Polansky & White, LLP

20080239767 - Power supply circuit with pulse generating circuit and current-limiting circuit: An exemplary power supply circuit (200) includes a transformer (240), a first transistor (260), a start-up resistor (261), and a pulse generating circuit (250). The transformer includes a primary winding (241), a secondary winding (243), and an auxiliary winding (242). The first bipolar junction transistor includes a collector connected to... Agent: Wei Te Chung Foxconn International, Inc.

20080239768 - Direct-current converter: A direct-current converter includes a high-frequency converting circuit converting voltage of a direct-current power source to alternating-current voltage, a transformer having primary and secondary windings P, S and a rectification smoothing circuit rectifying and smoothing voltage induced in the secondary winding. This converting circuit includes other transformer having first and... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080239769 - Device for transforming a primary ac voltage in a lower ac voltage for supplying an electrical load: A device for transforming an AC voltage to a lower AC voltage includes a generator of a PWM control signal and a first bidirectional switch to couple a load to the AC voltage during a conduction-phase. A second bidirectional switch discharges energy from the load during an off-phase of the... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20080239770 - Active network filter: The invention relates to a supply device (13) which feeds a consumer (7) with power by means of a supply network (12). Said supply device (13) fulfils both the function of a power supply and the function of a network filter, an optimum working point to be adjustable in terms... Agent: Michael J. Striker

20080239771 - Asymmetrical interleaving strategy for multi-channel power converters: In a power converter having m=two or more channels of power factor correction (PFC) circuits connected in parallel and an electromagnetic interference (EMI) filter connected in series therewith, phase shifts in switching between the respective PFC channels can allow increase of EMI filter corner frequency allowing reduction of size and... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20080239772 - Switched capacitor converters: A switched capacitor converter has a supply voltage input, an output circuit with one or more load capacitors, a semiconductor switch network. The switch network is connected at a switch junction point and across the voltage input, and has one or more pairs of said first and second switches. Each... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC C/o Intellevate, LLC

20080239774 - Synchronous rectifier control for synchronous boost converter: A synchronous boost DC/DC conversion system comprises an input for receiving a DC input voltage, an output for producing a DC output voltage, a power switch controllable to adjust an output signal of the conversion system, and an inductor coupled to the input. A synchronous rectifier is configurable to create... Agent: Mcdermott Will & Emery LLP

20080239773 - Voltage converter capable of correctly enabling secondary converting module coupled to output port of voltage converter by utilizing slope indication signal having different pulse amplitudes representative of different slope values: A method for converting an input voltage signal into an output voltage signal is disclosed. The method includes: providing a primary converting module and coupling the primary converting module to an input port of the voltage converter; providing a secondary converting module having a second electronic induction device and a... Agent: North America Intellectual Property Corporation

20080239775 - Power converter apparatus and methods using neutral coupling circuits with interleaved operation: A power converter apparatus, such as an uninterruptible power supply (UPS), includes an inverter having an input coupled to a first DC bus and a second DC bus and configured to generate an AC output with respect to a neutral terminal at a phase output terminal thereof. The apparatus further... Agent: Myers Bigel Sibley & Sajovec

20080239777 - Apparatus for converting an electrical current and method for reducing the load-change stress of power semiconductor units in the high-voltage energy distribution and transmission sector: An apparatus for converting an electrical current in a high-voltage energy distribution and transmission system has one or more current converter valves with a series circuit of a plurality of power semiconductor units. A cooler cools the power semiconductor units. Temperature deviations of the power semiconductor units can be decreased... Agent: Lerner Greenberg Stemer LLP

20080239776 - Cooling electronic components: An illustrative embodiment of the invention provides an electronic power inverter for a traction motor and a coolant for the inverter. The power inverter comprises an aluminum component and the coolant is a non-aqueous dielectric liquid coolant composition including an inhibitor. The coolant consists essentially of a mixture of an... Agent: General Motors Corporation Legal Staff