Electric power conversion systems inventions

20090262555 - Current-mode controlled dc-dc converter: A current-mode controlled DC-DC converter includes a comparator comparing a first or second current detection signal with a first or second reference current that is based on an error voltage of a voltage detection signal, a pulse generator generating a first pulse signal whose ON time is longer than an... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090262556 - H-bridge buck-boost converter: An H-bridge buck-boost converter includes a first half-bridge portion having at least one first transistor, an inductor portion connected to the first half-bridge portion at a first connection, a second half-bride portion connected to the inductor portion at a second connection, the second half-bridge portion having at least one second... Agent: Kenyon & Kenyon LLP

20090262557 - Bi-directional dc-dc converter: A bi-directional DC-DC converter includes a first series circuit connected to ends of a first DC power source and including a first winding of a first reactor and a first switch; a second series circuit connected to ends of the first switch and including a second winding of the first... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090262558 - Switching power supply circuit and driving method thereof: A switching power supply circuit includes a direct current (DC) power supply input, a first transistor, a capacitor, a first resistor, a second resistor, a switching circuit including a second transistor, and a first transformer including a first primary winding and a secondary winding. The DC power supply input is... Agent: Wei Te Chung Foxconn International, Inc.

20090262559 - Semiconductor device, and energy transmission device using the same: A semiconductor device includes: a high breakdown voltage semiconductor element including a switching element and a JFET element; and a sense element. The sense element includes a first drift region of a first conductivity type, a first base region of a second conductivity type, a first source region of a... Agent: Mcdermott Will & Emery LLP

20090262560 - Current controlled synchronous rectifying drive circuit: A current controlled synchronous rectifying drive circuit including a current transducer ST having a primary winding connected in series with a synchronous rectifier SR and having a secondary winding to detect a current signal of a synchronous rectifier SR, a signal shaping and reset circuit connected to the secondary winding... Agent: Beusse Wolter Sanks Mora & Maire, P. A.

20090262561 - Method and apparatus to improve regulation of a power supply: Techniques are disclosed to regulate a power supply with a compensation signal generation circuit. One example regulated power supply includes a sense circuit coupled to sense an output voltage of the regulated power supply. The regulated power supply also includes a switching power converter circuit, which includes a switch coupled... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090262562 - Efficiency improvement in power factor correction: An power converter that is operable to convert AC power into DC power that may be delivered to a load. The power converter includes a transformer and a controllable switch. The switching frequency of the power converter is configured to be dependent on the level of the AC voltage of... Agent: Marsh, Fischmann & Breyfogle LLP

20090257247 - Switching power supply circuit and surge absobring circuit: Provided is a switching power supply device capable of effectively improving power supply efficiency with a small number of parts. The switching power supply device includes: a switching circuits (S1 to S4) for converting DC input power into AC power, a transformer (T) having a primary winding to which the... Agent: Nixon & Vanderhye, PC

20090257248 - Direct current/direct current converter with multiple outputs: In a DC/DC converter comprising a transformer (10) having a primary winding Np and at least first and second secondary windings Ns1 and Ns2; a main output path connecting the first secondary winding to a main output Vp and comprising a synchronous rectifier circuit, a first inductor L1, and a... Agent: Sughrue Mion, PLLC

20090257249 - Semiconductor device, and energy transmission device using the same: An energy transmission device includes: a semiconductor device formed on a first semiconductor substrate; a semiconductor integrated circuit including a reverse current preventing diode and a control circuit; a DC voltage source; and a transformer. The reverse current preventing diode includes a reverse current preventing layer of a second conductivity... Agent: Mcdermott Will & Emery LLP

20090257250 - Synchronous rectifier dc/dc converters using a controlled-coupling sense winding: A synchronous rectifier DC/DC converter is provided. The synchronous rectifier DC/DC converter includes a power transformer, a first diode, a first MOSFET, and a first controller. The power transformer includes a core, a primary winding, a secondary winding, and a sense winding. The primary winding is wrapped around the core... Agent: Jianq Chyun Intellectual Property Office

20090257251 - Switching control circuit for a switching power converter: A switching control circuit is coupled to a switching device and an auxiliary winding of a transformer, wherein a primary winding of the transformer is coupled to the switching device. The switching control circuit includes a voltage receiver, a comparing unit and a propagation delay circuit, wherein the voltage receiver... Agent: Rosenberg, Klein & Lee

20090257253 - Method for operating a converter circuit and apparatus for implementing the method: The disclosure specifies a method for operating a converter circuit, the converter circuit having a converter unit with a large number of drivable power semiconductor switches and with a three-phase electrical AC voltage system, in which the drivable power semiconductor switches are driven by means of a drive signal (SA)... Agent: Buchanan, Ingersoll & Rooney PC

20090257252 - Power supply device for an electric circuit: In the case of a power supply device (2) for an electric circuit (3), an energy source (4) and an electric filter (7) are provided for the reliable and low-emission supply of energy to the electric circuit (3), wherein the energy source (4) and the electric filter (7) interact in... Agent: Fasse Patent Attorneys, P.A.

20090257254 - Voltage-clamp power converters: Several inversion circuits used to convert a DC input to an AC output comprise two series circuits, at least one clamp capacitor, and at least one transformer. Each of the series circuits is in parallel with the DC input. The first series circuit includes one switch network and at least... Agent: Jianq Chyun Intellectual Property Office

20090257255 - Active snubber for transition mode power converter: A transition mode power converter having an active snubber the operation of which is controlled using an auxiliary winding on the transformer of the power converter. In one embodiment, the power converter includes a transformer having a primary winding connected to a voltage source, a primary switch, an auxiliary switch,... Agent: Marsh, Fischmann & Breyfogle LLP

20090257256 - High efficient input current shaping for ac to dc converters with power factor correction requirement: A high efficient input current shaping AC to DC converter with PFC front end that reduces input current harmonics is provided. In one embodiment, an AC to DC converter connectable with an alternating current source and operable to output a direct current comprises a PFC front end followed by a... Agent: Marsh, Fischmann & Breyfogle LLP

20090257257 - Control device for interleaved converters, a system of interleaved converters and related control method: Control device for a switching converter structure comprising at least a first and a second interleaved converter, wherein the control device is configured to designate one converter as master and at least the other converter as slave, to set a time delay of the operating cycle of the slave converter... Agent: Seed Intellectual Property Law Group PLLC

20090257259 - Bridge synchronous rectifier: A current-triggered synchro-rectifier comprising an electronic switch configured to be in its ON setting when the current flowing through its cathode exceeds a predetermined threshold. The electronic switch may include a half-wave rectifier wired to the source terminal and the drain terminal of a MOSFET device, and a current monitor... Agent: William H. Dippert Eckert Seamans Cherin & Mellott, LLC

20090257258 - Power supply apparatus and semiconductor integrated circuit device: The present invention is directed to largely improve the efficiency at the time of light load of a power supply apparatus using a PFC controller. A PFC controller is provided with a voltage-current converter. The voltage-current converter converts voltage of a signal output from an error amplifier for detecting voltage... Agent: Mattingly & Malur, P.C.

20090257260 - Analog input device: An analog input device according to the present invention includes a scanning circuit (3) including a first insulation transformer (T1) for insulating an analog signal inputted from a thermocouple (10), a power supply section (2) for charging a test voltage used for disconnection detection of the thermocouple (10), a second... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090257261 - Control method for the matrix converter: An output voltage command signal for outputting a specified three-phase ac output voltage is generated by a line voltage control command signal generating section, and a signal representing a current flow ratio is generated by a current flow ratio generating section based on a specified input current command signal. The... Agent: GlobalIPCounselors, LLP

20090251924 - Power supplying unit: A power supplying apparatus includes a conversion device to convert direct current (DC) power from a battery set into alternating current (AC) power. A current transformer arrangement may generate a DC charging signal based on the AC power and provide the DC charging signal to the battery set. The current... Agent: Robert Eugene Todd

20090251926 - Converter and driving method thereof: A converter is disclosed for using at least one switch to convert an input signal to a square wave signal, and using the square wave signal to generate an output voltage. The converter converts the square wave signal by a switching operation of a switch and generates the output voltage,... Agent: Sidley Austin LLP

20090251925 - Current resonant dc-dc converter of multi-output type: A current resonant DC-DC converter of multi-output type is provided which comprises an output-regulatory MOS-FET 40 connected between a secondary winding 5c of a transformer 5 and a smoothing capacitor 16 in a second rectifying smoother 17, and an output control circuit 41 for controlling the on-off operation of output-regulatory... Agent: Bachman & Lapointe, P.C.

20090251927 - Phase shifted dc-dc converter with improved efficiency at light load: A device including a full bridge, a half bridge, a first inductor, and a second inductor. The full bridge has a first pair of transistors being activated when a load applied to the device is above a predetermined level and deactivated when the load applied to the device is below... Agent: Larson Newman & Abel, LLP

20090251928 - Switching power supply circuit: A switching power supply circuit includes a direct current (DC) power supply input terminal, a first transformer including a first primary winding, a second transformer, and a pulse generating circuit, and a startup circuit. The pulse generating circuit includes first and second first switching units connected in series and two... Agent: Wei Te Chung Foxconn International, Inc.

20090251929 - Convertor and driving method thereof: A converter and a driving method thereof are provided. The converter includes first and second switches, and generates a square wave signal according to operations of the first and second switches. The converter includes a first capacitor and a primary coil, and resonates a driving voltage by using a driving... Agent: Alston & Bird LLP

20090251930 - Method and apparatus for regulating an output current from a power converter: Techniques are disclosed to regulate an output current through a load coupled to a power converter using a current source coupled to the load. For instance, one power converter according to the teachings of the present invention includes an energy transfer element coupled between an input of the power converter... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090251931 - 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

20090251932 - Low harmonic rectifier circuit: A method, device, and plurality of circuit enhancements for a rectifier system that enable reduction in lower order and higher order harmonics, without substantially reducing the rectifier's direct current output voltage. The rectifier system comprises a phase shifting primary transformer subsystem and a multi-pulse rectifier. At least one series impedance... Agent: Dillon & Yudell LLP

20090251933 - Method for controlling inverters: The invention relates to a method for controlling the voltage and power of several HF inverters (2), connected in parallel at the output, of an electrically isolated inverter assembly as well as for distributing the load to these HF inverters (2) each consisting of at least one DC-DC converter (3),... Agent: Collard & Roe, P.C.

20090251934 - Apparatus, system and method for cascaded power conversion: An apparatus method and system are provided for power conversion, to supply power to a nonlinear load such as a plurality of light emitting diodes. An exemplary apparatus comprises a first power converter stage, a second power converter stage, a plurality of sensors such as first and second sensors, and... Agent: Gamburd Law Group LLC

20090251935 - Multi-pulse rectifier for ac drive systems having separate dc bus per output phase and multiple isolation transformers: An 18n-pulse rectifier for AC drive systems having a separate DC bus for each output phase is provided, where n=any positive integer. The rectifier uses three separate phase rectifiers, one for each output phase of a transformer, each comprised of 2n six-pulse diode bridges connected in series or parallel. Each... Agent: Banner & Witcoff, Ltd. Attorneys For Client No. 000449, 001701

20090251937 - Circuit arrangement having a dual coil for converting a direct voltage into an alternating voltage or an alternating current: The invention proposes a circuit arrangement for converting a DC voltage present at DC voltage terminals into an alternating current, which is supplied via AC voltage terminals, or an AC voltage, which circuit arrangement has a first series circuit, which is connected to the DC voltage terminals, comprises a first... Agent: Millen, White, Zelano & Branigan, P.C.

20090251936 - Distributed multiphase converters: A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its output. The pulses are produced at a high frequency relative to the signal modulated on... Agent: Michael W. Caldwell

20090251938 - Inverter circuit and method for operating the inverter circuit: An inverter circuit having a primary circuit with a first choke for periodically connecting a primary winding to a DC voltage present at an input of the inverter circuit, a secondary circuit with a secondary winding, the secondary winding arranged in series with a first capacitor and connected via a... Agent: Siemens Corporation Intellectual Property Department