Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems May archived by USPTO category 05/11

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
05/26/2011 > patent applications in patent subcategories.

20110122654 - High voltage ac/dc or dc/ac converter station with fiber-optic current sensor: DC current in a high voltage AC/DC or DC/AC converter station can be measured via the Faraday effect in one or more loops of an optical sensing fiber located at the base of a bushing extending through a wall of the hall. This arrangement can exploit the base of the... Agent: Abb Research Ltd.

20110122655 - Power supply with ac/dc converter and dc/ac inverter in loop: A power supply includes a DC/AC inverter and an AC/DC converter connected in a loop such that a DC output of the AC/DC converter is connected to a DC input of the DC/AC inverter and an AC output of the DC/AC inverter is connected to an AC input of the... Agent:

20110122656 - Power device with isolated varying-frequency pwm control: A power device with isolated varying-frequency PWM control contains a transformer having a primary side and a secondary side; a varying-frequency PWM chip located at the secondary side, the varying-frequency PWM chip containing a frequency adjustment circuit and PWM control circuit, the PWM control circuit having at least an output... Agent:

20110122657 - Switch with common-mode choke: A common-mode choke level-shifter drives a power switch with sub-nanosecond timing integrity without requiring a high-side gate-drive power supply. The same level-shifter may also be used to drive a low-side switch to avoid ground bounce effects.... Agent: Lawson Labs, Inc.

20110122658 - Power converter using energy stored in leakage inductance of transformer to power switch controller: The power converter includes a transformer that is coupled or decoupled from a power source by a switch controlled by a switch controller. The transformer includes a first primary winding coupled to a secondary winding. The energy stored in the leakage inductance of the first primary winding is received by... Agent: Iwatt Inc.

20110122659 - Power transistor driving circuits and methods for switching mode power supplies: A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for... Agent: Bcd Semiconductor Manufacturing Limited

20110122660 - Current mode digital control of the output voltage of a switching power supply: A method of controlling an output voltage of a pulse width modulation (PWM) converter with a PWM signal driving a power switch of the converter may include using a comparator to compare a reference voltage with a scaled output voltage of the converter, incrementing or decrementing an up/down counter at... Agent: Stmicroelectronics S.r.l.

20110122661 - Direct-type converting apparatus and method for controlling the same: An output voltage of a converter is given to a pair of DC power supply lines. Inverters are connected in parallel with each other between the DC power supply lines. When one inverter is operated based on a first zero vector and the other inverter is operated based on a... Agent: Daikin Industries, Ltd.

20110122662 - Buck and buck/boost converter systems having auxiliary circuits and method thereof: The configurations of a buck type and a buck/boost type converter systems and a controlling method thereof are provided in the present invention. The proposed buck/boost type converter system includes a rectifier bridge, a first auxiliary circuit including a first unidirectional switch coupled to the rectifier bridge and a second... Agent:

20110122663 - Power supply with arc flash protection mechanism and data-processing system employing same: A power supply with arc flash protection mechanism for providing power to a load is disclosed. The power supply comprises a first power connector including a plurality of power terminals and a first detecting terminal, a power conversion circuit, a control unit and a connection status detection circuit. The power... Agent: Delta Electronics, Inc.

20110122664 - Power factor correction type switching power supply unit: A soft-stop overvoltage protection circuit, into which a soft-stop overvoltage detection voltage proportional to a direct current output voltage is input, reduces the output of a multiplier in accordance with the soft-stop overvoltage detection voltage when the soft-stop overvoltage detection voltage exceeds a first threshold value. An overvoltage protection circuit,... Agent: Fuji Electric Systems Co. Ltd.

20110122665 - Voltage application time period measuring circuit and power supply apparatus including the same: Provided are a voltage application time period measuring circuit which does not require a battery, and a power supply apparatus including the voltage application time period measuring circuit. Each of a voltage application time period memory (32) and a set time period memory (33) is a nonvolatile memory, and hence... Agent:

20110122666 - Low power converter: An AC to DC converter system is disclosed in which a conversion circuit for converting an AC input signal to a DC output signal is operably coupled with an enabling circuit designed for sensing and output parameter indicative of the presence or absence of a load at the DC output.... Agent: TriuneIPLLC

20110122667 - Rectifier circuit: A high power factor rectifier circuit, provided with switching sections connected to an AC power supply for converting an AC voltage to a DC voltage, is formed with a bypass circuit provided. The bypass circuit, when the voltage of the AC power supply becomes higher than the voltage across a... Agent: Fuji Electric Holdings Co., Ltd.

20110122668 - Capacitor energy release circuit with reduced power consumption and power supply having the same: A power source includes a power input terminal, a filtering unit, a main circuit and a capacitor energy release circuit. The power input terminal receives an AC voltage. The filtering unit is connected to the power input terminal for filtering off noise contained in the AC voltage. The main circuit... Agent: Delta Electronics, Inc.

20110122669 - Modularly constructed power converter arrangement: A modularly constructed power converter arrangement has two end-side elements and at least one power converter module arranged therebetween. One end-side element has, a fan of an air cooling device, while the other end-side element has, aligned with the fan, cutouts acting as air passages. At least one end-side element... Agent: Semikron Elektronik Gmbh & Co. Kg

05/19/2011 > patent applications in patent subcategories.

20110116287 - Switching controller having switching frequency hopping for power converter: A switching controller having switching frequency hopping for a power converter includes an oscillator generating a pulse signal for determining a switching frequency of a switching signal, a maximum duty-cycle circuit generating a maximum duty-cycle signal in response to the switching signal for determining the switching frequency of the switching... Agent: System General Corp.

20110116288 - Apparatus for providing zero standby power control in an appliance: An apparatus is provided that includes first and second switches in line between an appliance and terminals of the appliance that are connectable to a power source. The first switched is configured to open and close based on closing and opening of a door of the appliance, and the second... Agent: Electrolux Home Products, Inc.

20110116289 - Method and apparatus of low current startup circuit for switching mode power supplies: A startup circuit for a switching-mode power supply (SMPS) includes a first voltage detector configured to trigger the switching-mode power supply from a first operation mode to a second operation mode when an input supply voltage exceeds a first threshold voltage, a current consumption in the first voltage detector in... Agent: Bcd Semiconductor Manufacturing Limited

20110116290 - Power control: A pick-up circuit for an inductive power transfer (IPT) system includes a series-tuned pick-up coil and a plurality of parallel AC processing circuits provided between the series-tuned pick-up coil and an output, each processing circuit being adapted to produce an output signal based directly or indirectly at least in part... Agent:

20110116291 - High efficiency multi-phase generator: A generator system that includes a six-phase AC machine and an active rectifier bridge employing low on-resistance switches, such as MOSFET switches, for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with... Agent: Gm Global Technology Operations, Inc.

20110116292 - Integrated multi-inductor magnetic member and multi-loop power factor correction circuit having same: A multi-loop power factor correction circuit includes a first rectifier circuit, an integrated multi-inductor magnetic member, plural switching circuits, plural rectifying elements, and a power factor correction controlling circuit. The integrated multi-inductor magnetic member includes a first slab, a second slab, a middle post, plural lateral posts, and plural winding... Agent: Delta Electronics, Inc.

20110116294 - Method, circuit configuration and bridge circuit: A method, circuit configuration and bridge circuit for charging a capacitance effective on the main current terminals of a semiconductor switch, in particular an intrinsic capacitance, in particular the drain-source capacitance of a MOSFET semiconductor switch or the collector-emitter capacitance of an IGBT semiconductor switch, the precharging, in particular the... Agent:

20110116293 - Power conversion equipment: In a power conversion device, a capacitor series circuit is connected in parallel with a direct current power supply, outputs an alternating current voltage having three or more potentials in a half-cycle period with the capacitor series circuit as a direct current input, wherein a neutral point of an alternating... Agent: Fuji Electric Holdings Co., Ltd.

20110116295 - Control device for matrix converter: A control device for a matrix converter includes an input voltage detector, an output current detector, a pulse width modulator, and an input voltage command calculator. The input voltage detector is configured to detect an input voltage of the matrix converter. The output current detector is configured to detect an... Agent: Kabushiki Kaisha Yaskawa Denki

05/12/2011 > patent applications in patent subcategories.

20110110120 - Inverter system: An inverter system includes inverting circuitry for inverting an input DC signal into a square wave or quasi-square wave AC signal across a resistance, and a controller for causing the inverting circuitry to invert the input DC signal into the AC signal. The DC signal is a DC voltage having... Agent: Ppg Industries Ohio, Inc.

20110110121 - Power supply circuit: A power supply circuit includes a rectifying circuit, at least one filter member, a transformer, and a control circuit. The rectifying circuit is configured to receive a primary AC voltage signal and convert the primary AC voltage signal to a DC voltage signal. The at least one filter member is... Agent: Chimei Innolux Corporation

20110110122 - Flyback converter system capable of preventing two side switches from being turned on simutaneously: A flyback converter system prevents a primary side switch and a secondary side switch from being turned on simultaneously through a controller. The controller includes a turning on switch module, a turning off switch module, and an enabling switch module. The turning on switch module is for turning on the... Agent:

20110110125 - Method and apparatus to limit maximum switch current in a switching power supply: An example integrated circuit for use in a power supply includes a switch, a terminal and a controller. The controller is coupled to control switching of the switch to regulate the output of the power supply in response to a feedback signal received at the terminal. The controller includes a... Agent: Power Integrations, Inc.

20110110124 - Method of forming a switching regulator and structure therefor: In one embodiment, a power supply controller is configured to receive a sense signal (CS) having a negative value that is proportional to the input voltage. The power supply controller uses the sense signal to limit the switch (27) current through the switch responsively to the value of the input... Agent:

20110110123 - Switching mode power supply spectrum shaping and the method thereof: Embodiments of circuits and methods for a switching mode power supply are described in detail herein. In one embodiment, a switching mode power supply includes a transformer having a primary winding and a secondary winding to supply power to a load, a feedback circuit that generates a feedback signal that... Agent:

20110110126 - Controller compensation for frequency jitter: An example controller for use in a power supply in accordance with the present teachings includes a drive signal generator, a jitter signal generator and a compensator signal generator. The drive signal generator is coupled to output a drive signal having a switching period and a duty ratio to control... Agent: Power Integrations, Inc.

20110110127 - Power factor correction circuit: The present invention relates to a power factor correction circuit that can reduce distortion of input current in a switching mode power supply. The power factor correction circuit provided in the present invention basically comprises a first inductor which is electrically connected at a first end thereof to an input... Agent: Silicon Mitus, Inc.

20110110128 - Preventing metal oxide varistor (mov) from releasing smoke, smell, and/or sound: A system includes an electrical component, a MOV, a voltage sensor, and a circuit. The MOV is connected in parallel to the electrical component. The voltage sensor detects a voltage over the MOV and the electrical component. The circuit removes power in response to the voltage sensor detecting the voltage... Agent:

20110110129 - Circuit arrangement and control circuit for a power-supply unit, computer power-supply unit and method for switching a power-supply unit: A circuit arrangement for a power-supply unit for generating at least one DC voltage from an AC voltage of a power grid includes a switching element that switches a load current of the power-supply unit, a current-limiting element connected in series to the switching element that limits a current surge... Agent: Fujitsu Technology Solutions Intellectual Property Gmbh

20110110130 - Interleaved-pwm power module system and method for operating the same: An interleaved-PWM power module system and method for operating the same are disclosed. The power system includes at least two power modules, each of which has a specific ID number. The power module with an extreme value of the specific ID number is set as a master power module and... Agent:

20110110131 - Method and apparatus for a power conversion device: There is provided an apparatus and methods for a power conversion device. The method includes rectifying a mains voltage to produce a dc voltage and placing the dc voltage on a bus. The bus is coupled to an output converter and has a switch. The method also includes monitoring the... Agent:

20110110133 - Frequency compression for an interleaved power factor correction (pfc) converter: A controller provides frequency compression for an interleaved power factor correction (PFC) converter that determines the ON and OFF times of each switch associated with the PFC converter to prevent operating frequencies in the audible range. The controller includes a first circuit for generating an ON time current source having... Agent: Polar Semiconductor, Inc.

20110110132 - Time-limiting mode (tlm) for an interleaved power factor correction (pfc) converter: The present invention provides a method of controlling an interleaved power factor correction (PFC) circuit operating in a discontinuous conduction mode (DCM). The controller employs a normal mode of operation in which inductor currents in each PFC sub-circuit are estimated based on the monitored input voltage and monitored output voltage,... Agent: Polar Semiconductor, Inc.

20110110134 - Saving energy mode (sem) for an interleaved power factor correction (pfc) converter: A method of controlling a power factor correction (PFC) converter having a first PFC sub-circuit and a second PFC sub-circuit determines when to transition the PFC converter between an interleaved mode and a saving energy mode (SEM). The method includes generating an amplified error signal based on a monitored output... Agent: Polar Semiconductor, Inc.

20110110136 - Converter device comprising at least five dc voltage levels and uninterruptible power supply provided with said device: m

20110110137 - Leakage current reduction in a power regulator: A regulator with decreased leakage and low loss for a power amplifier is described. Switching circuitry is used to connect the regulator input bias to a bias control voltage when the power amplifier is to be operated in an on condition or to a voltage generator when the power amplifier... Agent:

20110110135 - Wave detector circuit and high-frequency circuit: The temperature dependence of detection characteristics in a wave detector circuit is suppressed. A bias resistor and/or a load resistor are/is constituted by a resistive element having a high temperature coefficient, whereby a shift in detected output along with a change in temperature of a wave detector diode included in... Agent:

20110110138 - Methods and systems for phase current reconstruction of ac drive systems: Methods and systems for phase current reconstruction are disclosed. An example method comprises: sampling a current from a power stage comprising: three phase legs, a current sensor to measure a dc-link current, and three more current sensors configured to measure three summations of currents for the power stage, storing the... Agent: Board Of Regents, The University Of Texas System

05/05/2011 > patent applications in patent subcategories.

20110103096 - Thirty-six pulse power transformer and power converter incorporating same: Embodiments of the present invention provide novel techniques for using multiple 18-pulse rectifier circuits in parallel. In particular, each rectifier circuit may include an autotransformer having 15 inductors coupled in series, joined by 15 nodes interposed between pairs of the inductors. The inductors may be represented as a hexagon in... Agent: Rockwell Automation Technologies, Inc.

20110103097 - Method and apparatus for regulating gain within a resonant converter: An approach is provided for controlling a direct current gain of a resonant converter to increase power efficiency within a circuit. A phase shift module is configured to the resonant converter for generating a first control signal to control a primary driver of the resonant converter and a secondary control... Agent: Delta Electronics Inc.

20110103098 - Method and apparatus for resetting a resonant converter: An approach is provided for limiting or eliminating residual energy in a resonant network before restarting a resonant converter including the resonant network. An energy resetting module is configured to the resonant converter for limiting a peak current occurring in a switching circuit of the resonant converter by resetting energy... Agent: Delta Electronics Inc.

20110103099 - Switching control method of transformer coupled booster: Provided is a switching control method of a transformer coupled booster to suppress an increase in energizing current in a transformer of the transformer coupled booster and downsize the transformer coupled booster. A primary coil current that flows through a primary coil of the transformer, and a secondary coil current... Agent: Komatsu Ltd.

20110103100 - Isolated switching power supply apparatus: In an isolated switching power supply apparatus, by performing on/off control of a first switching device and a second switching device, energy is transmitted from the primary side to the secondary side using a second primary winding and a second secondary winding while the first switching device is on, and... Agent: Murata Manufacturing Co., Ltd.

20110103101 - Integrated control circuit for controlling a switching power supply, switching power supply incorporating the same, and a method of controlling a switching power supply: An integrated control circuit for controlling a switching power supply, a switching power supply incorporating the same, and a method of controlling the switching power supply, where the control IC includes a current comparator that detects current flowing through a switching device, a flip-flop circuit that controls the ON-period of... Agent: Fuji Electric Device Technology Co., Ltd

20110103102 - Voltage converter with high efficiency: A voltage converter transmits energy in multiple stages using a charge pump so as to decrease the voltage rating of the secondary side of the transformer and reduce the size of the transformer. Meanwhile, the voltage converter stores and recycles the leakage inductance energy by using a snubber circuit so... Agent:

20110103103 - Power supply with low power consumption hiccup standby operation: A power supply including a converter, a capacitance, and a hiccup control module. The converter converts an input voltage to both an output voltage and a preliminary standby voltage when in its active state. The capacitance stores the preliminary standby voltage which is charged to an upper voltage level when... Agent: Intersil Americas Inc.

20110103104 - Bias and discharge system for low power loss start up and input capacitance discharge: A power supply including an AC input, a filter, a full wave rectifier, a converter, a second rectifier, and a bias system. The filter includes at least one differential capacitor coupled to the AC input. The full wave rectifier develops a DC bus voltage on a DC bus node. The... Agent: Intersil Americas Inc.

20110103106 - Power conversion device: In a power conversion device, reactors in an AC input filter absorbing a voltage at a carrier frequency of a PWM converter and reactors in an AC output filter absorbing a voltage at a carrier frequency of a PWM inverter include one six-leg six-phase iron core reactor. Accordingly, the device... Agent: Kobe Electric Industry Inc.

20110103105 - Power transformer and power converter incorporating same: Embodiments of the present invention provide novel techniques for using multiple 18-pulse rectifier circuits in parallel. In particular, each rectifier circuit may include an autotransformer having 15 inductors coupled in series, joined by 15 nodes interposed between pairs of the inductors. The inductors may be represented as a hexagon in... Agent: Rockwell Automation Technologies, Inc.

20110103107 - Resonance circuit for dc-link voltage control in dc-to-ac inverter: The present disclosure relates to a resonance circuit for DC-link voltage control in a DC-to-AC inverter. The resonance circuit comprises two active switches. Before the active switches of the DC-to-AC inverter are turned on, a DC-link voltage is isolated by the active switches and the active switches of the DC-to-AC... Agent: Industrial Technology Research Institute

20110103108 - Converter valve: A converter valve unit including a plurality of parallel connected semiconducting elements, a free-wheeling diode and a control unit.... Agent: Abb Research Ltd.

20110103109 - Ac power source apparatus: An AC power source apparatus includes a first AC voltage generator having a first switch set, to output a first AC voltage having a positive-negative asymmetrical waveform by turning on/off the first switch set to a first end of a load; a second AC voltage generator having a second switch... Agent: Sanken Electric Co., Ltd.

20110103110 - Method of operating an inverter and inverter control arrangement: A method of operating an inverter for converting a DC power into AC power by use of a pulse width modulation switching scheme is provided is disclosed. The inverter is controlled by use of the pulse width modulation switching scheme to provide an alternating current based on a current demand... Agent:

20110103111 - Switching power converter with efficient switching control signal period generation: A power control system includes a switching power converter and a controller, and the controller responds to a time-varying voltage source signal by generating a switch control signal having a period that varies in accordance with at least one of the following: (i) the period of the switch control signal... Agent:

20110103112 - Current sensing signal comparing device, and current sensing signal comparing method: Provided is a current sensing signal comparing device and current sensing signal comparing method. The invention includes a current sensing circuit for detecting a current signal of a switching circuit and thereby generating a current sensing signal, a control unit for outputting a control signal, and a compensating circuit for... Agent: Delta Electronics, Inc.

20110103113 - Composite ac to dc power converter: A 24-pulse composite AC-to-DC converter is a converter using two or more conversion methods in parallel. The converter may include a main rectifier receiving at least a portion of an input AC signal, an autotransformer having an output voltage with lower amplitude than the input AC signal, and a plurality... Agent: Honeywell International Inc.

20110103116 - Plant for transmitting electric power: A plant for transmitting electric power comprising a direct voltage network (100) and at least one three-phase alternating voltage network (101) connected thereto through a station (102). This station comprises a Voltage Source Converter (103). A unit (104) is configured to control the converter according to a PWM pattern for... Agent: Abb Technology Ag

20110103114 - Solar power conversion circuit and power supply system using the same: A solar power supply system includes at least one solar power conversion circuit and an inverter circuit. Each solar power conversion circuit comprises a solar module and a direct current (DC) module. The solar module converts the solar power into the DC signals. The DC module with two-stage conversion comprises... Agent: Ampower Technology Co., Ltd.

20110103115 - Voltage source converter: A Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells has inductance means comprising a plurality of inductors (23) built in in said series connection of switching cells (7′) and... Agent: Abb Technology Ag

20110103117 - Grid interconnection inverter and grid interconnection device: A grid interconnection inverter includes: a voltage conversion circuit configured to output an intermediate voltage by raising or lowering an input voltage from a direct current power source; and a waveform conversion circuit configured to convert the intermediate voltage into a alternating current power in a sine waveform shape. The... Agent: Sanyo Electric Co., Ltd.

20110103118 - Non-isolated dc-dc converter assembly: A non-isolated DC-DC converter assembly includes a boost converter and a Ćuk converter connected together in a specific way. The non-isolated DC-DC converter assembly allows for grounding of a source and load at the same time, and provides a complete adjustability of the output voltage of the non-isolated DC-DC converter.... Agent: Abb Research Ltd.

20110103119 - Apparatus for and method of cooling electronic circuits: An electronic device such as an AC/DC power adapter includes a conductive heat dissipation system. The device contains heat generating components and is powered via power supply leads by an external power supply circuit. The device further contains a thermally conductive mass that is thermally coupled to both the heat... Agent: Flextronics Ap, LLC

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