Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems December patent applications/inventions, industry category 12/11

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.
12/29/2011 > 13 patent applications in 13 patent subcategories.

20110317449 - Alternating current regulating means: The present invention provides an alternating current regulating means including a positive half-cycle current-limiting circuit and a negative half-cycle current-limiting circuit. The positive half-cycle current-limiting circuit includes a first diode and a first current-limiting circuit. The negative half-cycle current-limiting circuit includes a second diode and a second current-limiting circuit. The... Agent:

20110317450 - Ac-to-dc power converting device: An AC-to-DC power converting device includes: a filter for filtering an external AC input voltage; a rectifier for rectifying the AC input voltage filtered by the filter to output a rectified voltage; a power factor corrector for receiving the rectified voltage from the rectifier to generate a boosted voltage; and... Agent: I Shou University

20110317451 - Reverse current limit protection for active clamp converters: DC-to-DC converters are protected from damage by, among other things, monitoring and controlling forward and reverse currents in their transformer primary windings. The currents are discontinued if their values fall outside a predetermined range or if they flow during a portion of the switching cycle in a manner that would... Agent: Maxim Integrated Products, Inc.

20110317452 - Bi-directional power converter with regulated output and soft switching: A resonant, bi-directional, DC to DC voltage converter with loss-less (soft) switching having regulated output and capable of converting power between two, high-potential and low-potential DC voltage sources. The converter's semiconductor and magnetic components provide both, output regulation and soft switching in both (step-down and step-up) directions of power conversion... Agent:

20110317453 - Control circuit, control method, and power supply device: A control circuit, a control method, and a power supply device are provided. The control circuit includes an obtaining module, adapted to obtain a voltage signal from a reverse surge current when the reverse surge current appears on a primary side of a switch power circuit of a synchronous rectification... Agent:

20110317454 - Dual switches flyback power converter with wide input voltage range: A dual switches Flyback power converter with a wide input voltage range according to the present invention comprises an input diode and an energy-store capacitor. The input diode can prevent the reflected voltage from the power transformer of the power converter to charge the electrolytic capacitor of the power converter.... Agent: System General Corp.

20110317455 - Leakage current reduction apparatus: Three-phase windings 11-13 and 21-23 of a first common-mode transformer 1 and a second common-mode transformer 2 are connected in series through connecting lines 8r-8t, respectively. The windings 11-13 are connected to an unillustrated AC power supply by connecting lines 91r-91t. The windings 21-23 are connected to a three-phase motor... Agent: Mitsubishi Electric Corporation

20110317456 - Optimum structure for charge pump circuit with bipolar output: A charge pump circuit with bipolar output comprises six switches, one transfer capacitor, two storage capacitors and a power source. The gate of the switches have been provided an input voltage collocated with clock signals to control the turn-on time of the switches in order to adjust the level of... Agent:

20110317457 - Electronic equipment and image forming apparatus: Electronic equipment includes: a first substrate; a second substrate; and a harness that connects the first substrate and the second substrate with other. The first substrate includes: a conversion unit that outputs converted power converted from supply of power supplied by a power source, and a control unit that outputs... Agent:

20110317458 - Switched-mode power supply controlling circuit and switched-mode power supply using the same: A controlling circuit is provided for controlling an output voltage of a main circuit of a switched-mode power supply. The controlling circuit includes components that generate a switching status selecting signal reflecting a voltage change of the main circuit, and output a reference voltage according to a voltage output status... Agent: Byd Company Limited

20110317459 - Controller for a power conversion circuit: A power conversion controller for controlling the operation of a switch in a power conversion circuit. The switch having a “time-on” property and a “clamping frequency” property, in use. The power conversion controller comprises a detector configured to detect one or more operational parameter values of the power conversion circuit,... Agent: Nxp B.v.

20110317460 - System and method for control of multiphase power converters: A control system for controlling a multiphase power converter includes a current control module, a voltage control module and a current command selector. The current control module generates grid voltage command signals for the multiphase power converter and the voltage control module generates reference converter current command signals for the... Agent: General Electric Company

20110317461 - Power converter: A synchronization detection PLL section generates an ON synchronized signal formed as a result of synchronization control based on a diode ON synthesized signal. The synchronization detection PLL section also generates an OFF synchronized signal formed as a result of synchronization control based on a diode OFF synthesized signal. A... Agent: Mitsubishi Electric Corporation

12/22/2011 > 12 patent applications in 9 patent subcategories.

20110310636 - Dc-dc converter: A DC-DC converter includes a current-source power converter that converts direct current into alternating current; a transformer that transforms the voltage of the alternating current output from the current-source power converter; a rectifier that converts the alternating current the voltage of which has been transformed by the transformer, into direct... Agent: Tdk-lambda Corporation

20110310637 - Dc-dc converter: A controller controls a voltage-source power converter and a current-source power converter based on a detection value of a rail voltage input to the voltage-source power converter and a detection value of a charging voltage output from the current-source power converter, at the time of charging operation.... Agent: Tdk-lambda Corporation

20110310638 - Power factor corrector and driving method thereof: The present invention includes a transformer including a first coil of a primary side transmitted with an input voltage and a second coil of a secondary side generating an output voltage. A power switch is connected to the first coil, and a capacitor removes a ripple of the output voltage.... Agent:

20110310639 - Flyback power converter with multiple outputs and a secondary side post regulator thereof: A flyback power converter with multiple outputs is disclosed. The flyback power converter has a transformer, a first output circuit, a second output circuit, and a secondary side synchronous rectification controller. The transformer has a primary side winding, a first output winding, and a second output winding. The first output... Agent: Niko Semiconductor Co., Ltd.

20110310640 - Kind of llc resonant converter for full voltage range and its control method: This invention realizes the full voltage working range of LLC resonant converter whose reliability can get a fundamental guarantee. And it becomes true to design a LLC converter to be a solid state converter. The lifetime of LLC converter would be equivalent to the lifetime of semi permanent devices used... Agent:

20110310641 - method of upgrading a plant for transmitting electric power and such a plant: A plant for transmitting electric power through HVDC includes two converter stations interconnected by a monopolar direct voltage network and each having an alternating voltage side for feeding electric power from one of said alternating voltage sides to the other. Each station has a line commutated converter. The plant is... Agent: Abb Technology Ag

20110310642 - Low cost current source converters for power generation application: A system comprising low cost topology for power converter systems is provided. The system takes advantage of the voltage-boost characteristic of a current source inverter (CSI) and utilizes a PWM CSI as a grid-side converter for power generation systems. Moreover, the generator-side converter employs low-cost devices, such as, but not... Agent: Rockwell Automation Technologies, Inc.

20110310643 - Power conversion device: According to one embodiment, an electronic device includes a positive electrode, a negative electrode, a first terminal, a second terminal, a first plurality of switching elements and anti-parallel diodes coupled between the positive electrode and the first terminal and the second terminal, a second plurality of switching elements and anti-parallel... Agent:

20110310644 - Power conversion device: A power conversion device includes: an inverter that converts a DC current supplied from a DC power source to an AC current by engaging a plurality of switching elements, which constitute an upper arm, and a plurality of switching elements, which constitute a lower arm, in switching operation; a control... Agent: Hitachi Automotive Systems, Ltd.

20110310645 - Semiconductor device and snubber device: A semiconductor device of the present invention includes a switching transistor, and a recovery diode and a snubber device which are mounted on a single conductive substrate (frame) on which the switching transistor is also mounted. The snubber device includes a SiC-MOSFET connected between an output terminal C and a... Agent: Mitsubishi Electric Corporation

20110310646 - Circulating current detection for redundant power supply: A system and method for detecting a circulating current in a redundant AC-DC power supply is disclosed. In one embodiment, a redundant AC-DC power supply system can include a first AC-DC power converter that is configured to generate a first DC output. A second AC-DC power converter is configured to... Agent:

20110310647 - Redundant parallel non-isolated input converters: A redundant AC-DC power supply system and method is disclosed. A first AC-DC power converter is configured to generate a first output voltage and a first relay is configured to selectively couple and decouple the first AC-DC power converter to an output of an output circuit. A second AC-DC power... Agent:

12/15/2011 > 14 patent applications in 11 patent subcategories.

20110305043 - Isolated switching power supply apparatus: A control IC including a full-bridge circuit is disposed on a primary side and a secondary side. Bidirectional communication is performed between the primary side and the secondary side in a state in which they are isolated. A control signal output from the primary side or the secondary side earlier... Agent: Murata Manufacturing Co., Ltd.

20110305047 - Control system for a power converter and method of operating the same: A power converter employing a control system configured to make multiple functional use of a circuit node therein and method of operating the same. In one embodiment, the power converter includes a power train including at least one power switch. The power converter also includes a control system including an... Agent:

20110305045 - Resonant power converting circuit: A resonant power converting circuit is provided, which includes a resonant converting unit, a control unit, a current detecting unit and a frequency modulation unit. The control unit outputs switching signals to the resonant converting unit to adjust an output thereof. The current detecting unit is configured to detect an... Agent: Silitek Electronic (guangzhou) Co., Ltd.

20110305046 - Resonant power converting circuit: A resonant power converting circuit is provided, which includes a resonant converting unit, a control unit, a voltage detecting unit and a frequency modulation unit. The control unit outputs switching signals to the resonant converting unit to adjust an output of the resonant converting unit. The voltage detecting unit is... Agent: Silitek Electronic (guangzhou) Co., Ltd.

20110305044 - Sweeping frequency llc resonant power regulator: An LLC resonant power regulator system (10) includes a transformer (22) comprising a primary inductor (20) and a secondary inductor (26) and an input resonant tank (18) comprising an input resonant capacitor, an input leakage inductor, and the primary inductor (20) connected in series. The system also includes an input... Agent: Texas Instruments Incorporated

20110305048 - Active-clamp circuit for quasi-resonant flyback power converter: An active clamp circuit for a QR flyback power converter according to the present invention comprises an active-clamper connected to a primary winding of a power transformer of the QR flyback power converter in parallel. A high-side transistor driver is coupled to drive the active-damper. A charge-pump circuit is coupled... Agent: System General Corp.

20110305049 - Phase-controlled uninterruptible power supply: A phase-controlled power supply is disclosed. The power supply includes a power conditioner with an input configured to connect to an external source of electrical power, the power conditioner being configured to provide conditioned power on its output. The power supply also includes a transformer having a primary winding and... Agent: Carefusion 303, Inc.

20110305050 - Methods for minimizing double-frequency ripple power in single-phase power conditioners: A method is provided for minimizing a double-frequency ripple power exchanged between a load and an energy source, the energy source delivering electrical power to the load through a single-phase power conditioner, and the power conditioner being coupled to an energy storage device. The method includes determining a phase shift... Agent:

20110305051 - Start-up circuit with low standby power loss for power converters: A start-up circuit with low standby power loss for power converters according to present invention comprises a first diode and a second diode coupled to an input voltage of the power converter. A start-up resistor is coupled to the join of the first diode and the second diode. A high-voltage... Agent: System General Corp.

20110305052 - Method and apparatus to control a power factor correction circuit: An example power factor correction (PFC) converter includes an energy transfer element, a power switch, and a controller. The controller includes an integrator and on/off logic. The integrator generates an integrator output signal in response to a voltage sense signal and a current sense signal. The on/off logic drives the... Agent: Power Integrations, Inc.

20110305053 - Switching control circuits with valley lock for power converters: A switching control circuit for a switching power converter is provided. The switching control circuit is coupled to a switching device and an auxiliary winding of a transformer. The switching control circuit includes a valley detecting circuit, a valley lock circuit, and a PWM circuit. The valley detecting circuit is... Agent: System General Corporation

20110305054 - Bi-directional switch, alternating-current two-wire switch, switching power source circuit, and method of driving bi-directional switch: A semiconductor device 101 in a bi-directional switch includes: a first electrode 109A, a second electrode 109B, a first gate electrode 112A, and a second gate electrode 112B. In a transition period: when the potential of the first electrode 109A is higher than the potential of the second electrode 109B,... Agent:

20110305055 - Adaptive synchronous rectification control method and apparatus: An adaptive synchronous rectification control circuit and a control method are developed. The control circuit comprises an adaptive circuit that generates a reference signal in response to a detection signal of a power converter. A clamped circuit clamps the reference signal at a threshold voltage if the reference signal equals... Agent: System General Corp.

20110305056 - Desk top item with led means has usb-unit(s) or usb-module to charge other electric or digital data device(s): The Desk Top items with LED means has USB-unit(s) or USB-Module to charge other electric or digital device(s) which offer people to charge smart phone or electric & digital data device from near by place items to quick charge other device(s) while people work, rest, stay. The said desk top... Agent:

12/08/2011 > 13 patent applications in 10 patent subcategories.

20110299301 - Fixed-frequency llc resonant power regulator: An LLC resonant AC/DC power regulator system (10) includes a transformer (20) comprising a primary inductor and a secondary inductor. An LLC resonant tank (18) is configured to have first and second resonant frequencies. A full-bridge is coupled between first and second voltages and includes a first pair of switches... Agent: Texas Instruments Incorporated

20110299302 - Resonant converter system with hybrid control apparatus 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: Delta Electronics, Inc.

20110299303 - Inverter of new and renewable energy storage system: Provided is an inverter of a renewable energy storage system, which has an input port and an output port electrically insulated, and is compact and low-priced, while having a simplified circuit. The inverter includes a DC-DC converting unit connected to the DC link, and an inverting unit connected between the... Agent:

20110299304 - Dc/dc converter with magnetic flux density limits: A DC/DC converter may include a power stage circuit, a pulse generator circuit, a flux density monitor, and power control logic. The power stage circuit includes an input, an output, and a transformer with a core. The power stage circuit may be configured to operate in a power transfer mode... Agent: Linear Technology Corporation

20110299305 - Digital dynamic delay modulator and the method thereof for flyback converter: A digital dynamic delay modulator and the method thereof are applied to a flyback converter. A first input voltage signal from the flyback converter is received and compared with a threshold voltage to determine whether a counting condition is matched. When the counting condition is matched, an integer predetermined count... Agent:

20110299306 - Method and apparatus for a control circuit responsive to an impedance coupled to a control circuit terminal: An example power supply controller includes a regulation circuit, a current sense circuit, and a response circuit. The regulation circuit is coupled to regulate a sense terminal to a voltage level. The current sense circuit is coupled to the sense terminal to sense a current through the sense terminal a... Agent: Power Integrations, Inc.

20110299307 - Uninterruptible power supply apparatus: An uninterruptible power supply apparatus includes a cooler cooling a converter/chopper circuit and a cooler cooling a PWM inverter. The converter/chopper circuit and the cooler make up one integrated unit. Accordingly, a smaller apparatus can be achieved, compared with a conventional apparatus in which a cooler is provided for each... Agent: Toshiba Mitsubishi-electric Indus. Sys. Corp.

20110299308 - Common mode voltage reduction apparatus and method for current source converter based drive: Current source converter drives and common mode voltage reduction techniques are presented in which a space vector modulation zero vector for current source inverter (or rectifier) control is selected according to the switching state of the current source rectifier (or inverter) and according to the AC input power and the... Agent: Rockwell Automation Technologies, Inc.

20110299309 - Ultra-high efficiency switching power inverter and power amplifier: An apparatus for providing a power output proportional to a source signal, including a phase modulator driving an upper and an lower power driver with carrier waveforms having a relative phase difference and having a signal modulated thereon, and coupled to a resonator circuit to operate as a substantially zero-voltage... Agent:

20110299310 - Synchronous operating system for discharge tube lighting apparatuses, discharge tube lighting apparatus, and semiconductor integrated circuit: A synchronous operating system for operating a plurality of discharge tube lighting apparatuses at the same frequency and same phase includes (1) an oscillator of a triangular wave signal whose inclination for charging a capacitor C2 and inclination for discharging the same are the same, (2) a signal generation part... Agent: Sanken Electric Co., Ltd.

20110299312 - Inverter for solar cell array: A full-bridge, NPC inverter uses pulse width modulation (PWM) to convert the DC voltage from a solar panel array to an AC voltage at the output of the inverter that is acceptable for connection to a utility. The PWM control unit has a predetermined carrier frequency. The carrier unit uses... Agent: Abb Inc.

20110299311 - Power generation system, power converter system, and methods of converting power: A power converter system includes an inverter including a first bridge and a second bridge, wherein each of the first bridge and the second bridge includes at least one switch. The power converter system also includes an inductor including a first winding coupled to an output of the first bridge... Agent:

20110299313 - Variable reactive element in a resonant circuit: A resonant converter is provided which may be used for supplying power to the primary conductive path of an inductively coupled power transfer (ICPT) system. The converter includes a variable reactive element in the resonant circuit which may be controlled to vary the effective inductance or capacitance of the reactive... Agent: Auckland Uniservices Limited

12/01/2011 > 21 patent applications in 14 patent subcategories.

20110292686 - Capacitor circuit and power conversion circuit: A capacitor circuit includes a first capacitor line including a film capacitor and a second capacitor line including a ceramic capacitor that are connected in parallel with each other. The second capacitor line includes an inductance element that is connected in series with the ceramic capacitor. The inductance element is... Agent: Murata Manufacturing Co., Ltd.

20110292687 - High voltage capacitive power transformer: A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller... Agent:

20110292689 - Driving circuit for power switching device, driving method thereof, and switching power supply apparatus: A driving circuit includes a generator configured to generate a driving signal having plural levels of voltage at which a power switching device is turned on. The driving circuit also includes a switching controller configured to switch between the plural levels of voltage at which the power switching device is... Agent: Panasonic Corporation

20110292688 - Resonant conversion system with over-current protection processes: A resonant conversion system is provided, in which a resonant converter receives an input voltage to generate an output voltage, and a buck converter provides the input voltage of the resonant converter, and controls the input voltage to perform an over-current protection process.... Agent:

20110292691 - Isolated switching power supply apparatus: In an ON/OFF type isolated DC-DC converter that stores electromagnetic energy in a main transformer during an ON period of a power switch and releases the electromagnetic energy to an output during an OFF period of the power switch, high-speed, highly stable output voltage control without the need for a... Agent: Murata Manufacturing Co., Ltd.

20110292690 - Multi-winding high step-up dc-dc converter: A multi-winding high step-up DC-DC converter includes a three-winding transformer to transform a low DC voltage to a high DC voltage; a power switch to control the energy flux of the primary winding of the three-winding transformer based on turning on/off the power switch; a first diode to control the... Agent: National Cheng Kung University

20110292692 - Opto-coupled sensing: The present invention provides an isolated regulating power converter with opto-coupled feedback of output (Vo) with respect to a reference level (Vset) for regulation to a converter controller. The sense of the feedback signal is such that the opto-coupler LED is ON when Vo<Vset and OFF when Vo>Vset with the... Agent: Texas Instruments (cork) Limited

20110292693 - Direct-current power supply device: A direct-current power supply device 1, in which a switching element Q1 used by a PFC circuit is shared as a switching element Q1 by a DC/DC converter, includes voltage suppression means (switching elements Q2 and Q3 and resistance R2) for supplying electric charge accumulated in a smoothing capacitor C1... Agent:

20110292694 - System and method for providing control for switch-mode power supply: System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the... Agent: On-bright Electronics (shanghai) Co., Ltd.

20110292695 - Power converter system and method: A three-phase power converter includes a converter configured to convert a three phase AC power input to a DC power output, the DC power output being provided to high and low sides of a DC bus, and an inverter coupled to the DC bus and configured to convert the DC... Agent: Rockwell Automation Technologies, Inc.

20110292697 - Power transfer devices, methods, and systems with crowbar switch shunting energy-transfer reactance: The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for example, polyphase AC), the input and output switches are opened, and a crowbar switch shunts the inductance which is used for energy... Agent: Ideal Power Converters, Inc.

20110292696 - Variable frequency drive and methods for filter capacitor fault detection: Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node current and/or voltages and detecting changes in the fundamental frequency component of the measured neutral condition at the fundamental frequency of the input power and/or based on input current... Agent: Rockwell Automation Technologies, Inc.

20110292698 - System and method providing over current and over power protection for power converter: System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for... Agent: On-bright Electronics(shanghai) Co., Ltd.

20110292699 - Systems and methods for distortion reduction: Systems and devices for reduction of total harmonic distortion in power supply circuits are presented. Example embodiments of the disclosed systems of total harmonic distortion reduction reduce a low frequency output voltage ripple seen by the voltage control loop by adding a compensating ripple voltage to the output feedback signal.... Agent: Texas Instruments Incorporated

20110292701 - Method and apparatus for improved burst mode during power conversion: A method and apparatus for power conversion. In one embodiment, the apparatus comprises a DC-AC conversion stage; an intermediate capacitor coupled across the DC-AC conversion stage; and a burst mode controller coupled to the intermediate capacitor and the DC-AC conversion stage, wherein the burst mode controller (i) maintains a voltage... Agent: Enphase Energy, Inc.

20110292700 - Power conversion device and method for controlling thereof: m

20110292702 - Method and apparatus to improve dynamic response of the synchronous rectifying for resonant power converters: A synchronous rectifying circuit for a switching power converter is provided. The synchronous rectifying circuit includes a power transistor, a diode, and a control circuit. The power transistor and the diode are coupled to a transformer and an output of the power converter for rectification. The control circuit generates a... Agent: System General Corporation

20110292704 - Semiconductor device and power supply device: A power supply topology is used in which a transistor is provided on the side of an output node of a rectifying circuit. An inductor is provided on the side of a reference node, a resistor is inserted between the transistor and the inductor, and one end of the resistor... Agent: Renesas Electronics Corporation

20110292703 - Single-stage ac-to-dc converter with isolation and power factor correction: A new class of Single-Stage AC-DC converters with built-in Isolation and PFC feature is introduced along with the companion hybrid switching conversion method. Several different converter topologies are introduced, which all feature three switches only, single magnetic component and low voltage stresses on all switches.... Agent: Cuks, LLC

20110292705 - Method and apparatus for power converter input voltage regulation: A method and apparatus for regulating an input voltage to a power conversion module. In one embodiment, the method comprises computing a voltage regulation threshold based on an output voltage for the power conversion module; comparing an input voltage of the power conversion module to the voltage regulation threshold; and... Agent: Enphase Energy, Inc.

20110292706 - Direct current regulated power supply: A direct current regulated power supply includes a switch power supply, a power connector, and a control switch. The switch power supply is configured for receiving a main power and converting the received main power into direct current power to supply an electronic device. The power connector is electrically coupled... Agent: Hong Fu Jin Precision Industry (shenzhen) Co., Ltd.

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