Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems June invention type 06/11

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.
06/30/2011 > 31 patent applications in 22 patent subcategories. invention type

20110157919 - Vcc generator for switching regulator: A voltage across a capacitor provides a supply voltage for circuits in an integrated circuit used to control a switching voltage regulator. The capacitor is charged during an OFF portion of a pulse width modulated (PWM) control signal that controls a first transistor in the switching voltage regulator. The voltage... Agent:

20110157920 - Charge-mode control device for a resonant converter: A control device for a resonant converter includes a first circuit structured to rectify a signal indicating the current circulating in the primary winding, a second circuit adapted to integrate at least the rectified signal and structured to generate at least a control signal of the switching circuit according to... Agent: Stmicroelectronics S.r.l.

20110157921 - Multi-output dc-to-dc conversion apparatus with voltage-stabilizing function: A multi-output DC-to-DC conversion apparatus with a voltage-stabilizing function includes a center-tapped main transformer, a semiconductor component group, and a triggering controller. The DC-to-DC conversion apparatus provides at least two output voltages which are a main output voltage and an auxiliary output voltage, respectively. The auxiliary output voltage is functioned... Agent:

20110157923 - Circuits and methods for controlling power converters including transformers: A power converter includes a transformer operated in multiple switching cycles. At least one switching cycle includes a charging period, a discharging period, and an adjusting period. The transformer has a primary winding coupled to a power source and a secondary winding coupled to a load. During the charging period... Agent:

20110157922 - Primary side sensing for isolated fly-back converters: A switching voltage regulator samples signals corresponding to a flyback voltage on an auxiliary winding on a primary side of the switching voltage regulator. The flyback voltage functions as feedback from the output voltage on the secondary side. On detection of presence of the flyback voltage, samples corresponding to the... Agent:

20110157924 - Using output drop detection pulses to achieve fast transient response from a low-power mode: In a first aspect, in a Primary Side Regulation (PSR) power supply, some primary current pulses are used to forward bias an output diode such that an auxiliary winding voltage can be properly sampled after each pulse. The samples are used to regulate the power supply output voltage (VOUT). Other... Agent: Active-semi, Inc.

20110157925 - Energy-saving power converter having suspend mode: The present invention relates to an energy-saving power converter having a suspend mode. The power converter includes an output port for being electrically connected to the electricity consuming device; a voltage-transforming unit for outputting an output voltage appropriate to the needs of the electricity consuming device; a sensor for assessing... Agent: Kerio Technologies, Inc

20110157926 - Integrated circuit for an oscillator structured to drive a control device of a switching resonant converter: A circuit for an oscillator structured to drive a control device of a switching resonant converter; the converter having a switching circuit structured to drive a resonant load provided with at least one transformer with at least a primary winding and at least a secondary winding. The control device structured... Agent: Stmicroelectronics S.r.l.

20110157927 - Charge-mode control device for a resonant converter: A control device for a resonant converter, the control device including a first circuit to integrate at least one signal indicating a half wave of a current circulating in a primary winding of a transformer; the first circuit is structured to generate at least a control signal of the switching... Agent: Stmicroelectronics S.r.i.

20110157928 - Dc-to-ac converting circuit with wide input voltage: A DC-to-AC converting circuit includes a transformer, a first modulation switching circuit, a second modulation switching circuit and a third modulation switching circuit, an inverter switching circuit and a controlling unit. Under control of the controlling unit, two of the first, second and third modulation switching circuits are selectively enabled... Agent: Delta Electronics, Inc.

20110157929 - Method and apparatus for electric isolation transmission: A method and apparatus used for electric isolation transmission are provided. The method includes: providing an isolation transmission circuit having at least one capacitor; and implementing electric isolation between the primary side and secondary side, and suppressing leakage currents generated between the primary side and secondary side and transmitting power.... Agent:

20110157930 - Power input stabilizing circuit: The power input stabilizing circuit provides a first resistor at the input terminals to suppress impulse current. Then, the power passes through a power input limiting circuit including a non-polarity capacitor, a rectifier circuit formed by diodes, and a polarity capacitor so as to provide a current within a specific... Agent:

20110157931 - Resonant power converter: The present invention provides a resonant power converter including: a first switch circuit in which multiple normally-off switches Q1 to Q4 to which resonant capacitors 6a to 6d are connected in parallel respectively are connected in a single-phase or three-phase bridge configuration; and a second switch circuit connected to a... Agent: Sanken Electric Co., Ltd.

20110157932 - Multi-resonance power supply with an integral quality factor: Subject of the invention is a multi-resonance power supply with integral quality factor limiter, designated for transformation of direct voltages, characterised by high immunity to overload and rapid load changes. The power supply has the (TS) isolating transformer, with its primary winding connected to the main (OR) resonant circuit having... Agent:

20110157933 - High voltage power supply: A high voltage power supply may include a switching unit, a voltage resonant unit, a connection part, a rectifier unit, a voltage amplifying unit, a voltage output unit, and a frequency control unit. The switching unit is driven per a frequency signal. The voltage resonant unit is connected to the... Agent: Canon Kabushiki Kaisha

20110157934 - Selective enablement of power supply sections for improving efficiency: Systems and methods are disclosed for maximizing the efficiency of a power supply according to the value of a load to be powered. One embodiment provides a power supply system including a first and second stage. The first stage has at least one AC to DC conversion section for converting... Agent: International Business Machines Corporation

20110157935 - Fully resonant power supply: A power supply produces one or more conditioned and scaled output voltages with low noise. The power supply has various components to produce a plurality of higher output voltages from a plurality of taps of a multiplier or multiple isolated outputs. Components include an internal reference voltage circuit or an... Agent: University Of New Hampshire

20110157936 - Using output drop detection pulses to achieve fast transient response from a low-power mode: In a first aspect, in a Primary Side Regulation (PSR) power supply, some primary current pulses are used to forward bias an output diode such that an auxiliary winding voltage can be properly sampled after each pulse. The samples are used to regulate the power supply output voltage (VOUT). Other... Agent: Active-semi, Inc.

20110157937 - Dc to ac converter: A method and apparatus for converting DC electricity to AC electricity, the AC electricity having a sine wave shape. DC electricity is supplied to a pulse width modulator. A pulse width modulated signal is formed from the DC electricity, the pulse width modulated signal comprising a plurality of pulses, each... Agent:

20110157938 - Alternating current-direct current converter device: In the present invention, switching circuits connected in middle points of power supply lines of a three-phase alternating-current power supply are switched to cause currents to intermittently flow on primary windings of a transformer, a voltage generated on a secondary winding is rectified and smoothed, and then is outputted to... Agent: Sanken Electric Co., Ltd.

20110157939 - Power adapter apparatus and power management method: A power adapter apparatus and a power management method thereof are disclosed in the invention. The power adapter includes an output interface and a power modulation unit. The power adapter can be electrically connected with an electronic device through the output interface. There is a detective structure disposed on the... Agent: Advanced Connection Technology, Inc.

20110157942 - Controllable universal supply with reactive power management: Apparatus and associated methods involve a controllable supply adapted for controlling switch phasing and pulse width to substantially equalize power in adjacent quadrants of a sinusoidal source voltage waveform to regulate reactive power drawn from the source. In an illustrative example, the supply may, in some embodiments, deliver power to... Agent: Flyback Energy Inc.

20110157943 - Method and apparatus to reduce line current harmonics from a power supply: A method and apparatus for controlling a power converter. In one aspect, a controller for use in a power converter includes a first calculator coupled to determine an end of an on time of a power switch of the power converter by integrating an input current to output an on... Agent: Power Integrations, Inc.

20110157940 - Power factor corrector with high power factor at low load or high mains voltage conditions: Various exemplary embodiments relate to a power factor corrector for low loads and a related method. The power factor corrector raises power factor at low loads or high mains voltages by having the a greater amount of current delivered to the load during the falling time of the absolute value... Agent: Nxp B.v.

20110157941 - Synchronous vcc generator for switching voltage regulator: A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control... Agent:

20110157947 - Multi-output buck converting apparatus with controllable energy-releasing function: A multi-output buck converting apparatus with a controllable energy-releasing function includes a main buck converter and at least one auxiliary buck converter to provide multi-output voltages. The multi-output buck converting apparatus further includes an energy releasing unit and an abnormal voltage signal generating unit. The abnormal voltage signal generating unit... Agent:

20110157946 - Multi-output buck converting apparatus with shutdown protection: A multi-output buck converting apparatus with a shutdown protection includes a main buck converter and at least one auxiliary buck converter to provide multi-output voltages. The multi-output buck converting apparatus further includes an abnormal voltage signal generating unit. The abnormal voltage signal generating unit generates a control signal to control... Agent:

20110157945 - Synchronous rectifier circuit: A synchronous rectifier circuit rectifies an AC input voltage to produce a DC output voltage. The synchronous rectifier circuit comprises MOSFET switches coupled within the secondary transformer windings resulting in a shortened AC current path compared to conventional synchronous rectifier circuits. The shortened current path mitigates skin and proximity effects,... Agent: Iwatt Inc.

20110157944 - Temperature monitoring for circuit breakers: Electronic temperature emitting power switch arrangement, in particular a transformer for electric drives or other power rectifiers for carrying out the method according to one of the preceding Claims, with two or more switches, in particular semi-conductor power switches coupled with or arranged on a common cooling body, and with... Agent: Baumuller Nurnberg Gmbh

20110157948 - Current source inverter: A current source inverter includes an inverter having arm units and AC terminals, the numbers of the arm units and AC terminals being adapted to an AC load connected to the AC terminals. An upper arm is connected between a positive DC terminal and the corresponding AC terminal and has... Agent: Sanken Electric Co., Ltd.

20110157949 - Highly efficient iii-nitride power conversion circuit: According to an exemplary embodiment, a III-nitride power conversion circuit includes a gate driver having a plurality of cascaded inverters, each of the plurality of cascaded inverters including at least one III-nitride transistor. At least one of the plurality of cascaded inverters has a cutoff switch and a III-nitride depletion... Agent: International Rectifier Corporation

06/23/2011 > 21 patent applications in 16 patent subcategories. invention type

20110149606 - Ac-to-dc converting circuit applicable to power-charging module: The AC power generated by AC utility has been successfully transferred from AC-to-DC by means of an AC-to-DC converting circuit. This disclosure provides an AC-to-DC converting circuit applicable to a power-charging module, and the AC-to-DC converting circuit comprises two parts such as a first stage being a low-frequency AC to... Agent: Industrial Technology Research Institute

20110149607 - Controller for a power converter: A power converter employing a controller configured to increase a dead time between conduction periods of first and second power switches therein and method of operating the same. In one embodiment, the power converter includes first and second power switches coupled to an input thereof, and a sensor configured to... Agent:

20110149608 - Electrical power converters and methods of operation: An electrical power converter includes a transformer (4) with a primary circuit and a secondary circuit. Detecting circuitry is employed to compute a signal representative of the output current in the secondary circuit, and this signal controls the timing of the switching function of rectification switches (49,50) which rectify the... Agent: Nxp B.v.

20110149609 - Bidirectional signal conversion: An embodiment of a controller for a multidirectional signal converter is operable to cause the converter to regulate a first signal at a first converter node, and to have a switch timing that is independent of a direction of power transfer between the first converter node and a second converter... Agent: Intersil Americas Inc.

20110149610 - Bidirectional signal conversion: An embodiment of a multidirectional signal converter includes first and second converter nodes, a transformer, and first and second stages. The transformer includes first and second windings, and the first stage is coupled between the first converter node and the first winding of the transformer. The second stage includes a... Agent: Intersil Americas Inc.

20110149611 - Bidirectional signal conversion: An embodiment includes coupling a first intermediate node between a first inductor and a first winding of a transformer to a reference node during a first portion of a first switching cycle, uncoupling the first intermediate node from the reference node and coupling the first intermediate node to a signal-storage... Agent: Intersil Americas Inc.

20110149612 - Control method and controller with constant output current control: Control method and related controller, applicable to a power supply with a switch and an inductive device. The inductive current through the inductive device is sensed. An operating frequency of the switch is controlled to make an average of the inductive current substantially equal to a predetermined portion of the... Agent:

20110149614 - Dual mode flyback converter and method of operating it: A DC-DC converter includes a power switching device and a mode control logic circuit to control the power switching device and generate an ON-pulse. A flip-flop is configured to be set by the mode control logic circuit. A current mode comparator is configured to reset the flip-flop and to compare... Agent: Stmicroelectronics S.r.l.

20110149613 - Flyback converter utilizing boost inductor between ac source and bridge rectifier: A flyback converter utilizes a boost inductor coupled between a source of AC power and a bridge rectifier to provide power factor correction. A primary winding of the flyback transformer is coupled in series with a storage capacitor across the output of the bridge rectifier. A circuit, which includes a... Agent: Comarco Wireless Technologies, Inc.

20110149615 - Method and apparatus for limiting maximum output power of a power converter: An example power converter includes an energy transfer element, a switch, a controller, and a current offset circuit. The controller is coupled to switch the switch between an ON state and an OFF state to regulate the output of the power converter. The controller is also adapted to terminate the... Agent: Power Integrations, Inc.

20110149616 - Drive circuit for a synchronous rectifier and a method for controlling it: A pulsed drive signal without a dead band can be achieved by a drive circuit arranged to receive opposite pulsed input signals (PWM drive A, PWM drive B), having a dead band between them,—a transformer arranged to receive the input signals (PWM drive A, PWM drive B) and output intermediary... Agent: Telefonaktiebolaget Lm Ericsson (publ)

20110149617 - Ac/ac conversion power supply device: Provided is an AC/AC conversion power supply device including: n(n≧2) rectification circuits (D1 to Dn) connected in series with respect to an AC input; n high-frequency switching circuits (SC1 to SCn) respectively connected to outputs of the rectification circuits (D1 to Dn); and n transformers (TR1 to TRn) each having... Agent: Nitta Corporation

20110149618 - Current waveform construction to generate ac power with low harmonic distortion from localized energy sources: Methods and apparatus to provide low harmonic distortion AC power for distribution by converting energy from natural or renewable sources into electrical form, and constructing a current waveform on a primary winding of a transformer by recapturing inductive energy previously stored in the transformer so as to transform the converted... Agent: Flyback Energy, Inc.

20110149619 - Method and apparatus for varying current limit to limit an output power of a power supply: A power supply controller is disclosed. An example power supply controller includes an input voltage sense input coupled to sense an input voltage sense signal representative of an input voltage of a power supply. An output voltage sense input is coupled to sense an output voltage sense signal representative of... Agent: Power Integrations, Inc.

20110149620 - Device and method for limiting drain-source voltage of transformer-coupled push pull power conversion circuit: p

20110149621 - Method and device for optimizing a space vector pulse width modulation: In a method for optimizing a space vector pulse width modulation, a voltage is connected to a load, by combining discrete switching states of a plurality of switches to control the load, the load being switched to zero potential by two of the switching states. In the case the maximum... Agent:

20110149622 - Interleaved bridgeless power factor corrector and controlling method thereof: In an interleaved bridgeless power factor corrector and a controlling method thereof, the interleaved bridgeless power factor corrector includes an AC input power supply, two input inductors, four active components, two passive components, an output capacitor, and an output resistor, wherein the four active components are cascaded in a full... Agent: Logah Technology Corp.

20110149623 - Active parasite power circuit: A circuit is provided that includes a parasitic power circuit that powers a parasitic circuit. The parasitic power circuit derives a supply voltage from an external AC or other signal suitable for use as a communications signal. A PMOS transistor or transistors is utilized to enable a supply voltage capacitor... Agent: Maxim Integrated Products, Inc.

20110149624 - Power conversion apparatus: A power conversion apparatus includes two power conversion circuits, two direct-current inductors, and a pulse-width-modulation control circuit. One of the two power conversion circuits is connected in parallel to a direct-current load or a single-phase alternating-current load, and the other of the two power conversion circuits is connected in parallel... Agent: Kabushiki Kaisha Yaskawa Denki

20110149625 - Capacitor module, power converter, vehicle-mounted electrical-mechanical system: A capacitor module in which the structure of a connecting portion is highly resistant against vibration and has a low inductance. The capacitor module includes a plurality of capacitors and a laminate made up of a first wide conductor and a second wide conductor joined in a layered form with... Agent: Hitachi, Ltd.

20110149626 - Bidirectional inverter for new renewable energy storage system: A bidirectional inverter is provided for a renewable energy storage system which may simplify the circuitry and lower manufacturing cost by reducing the numbers of switches and control signals. The bidirectional inverter includes a pulse-width-modulation (PWM) signal provider for providing a PWM signal, a push-pull inverter coupled to the PWM... Agent:

06/16/2011 > 18 patent applications in 14 patent subcategories. invention type

20110141770 - Power supply discontinuous input voltage extender: A system and method for converting a relatively high voltage into a relatively low voltage, the method comprising the steps of: receiving a first series of pulses at the relatively high voltage and a first frequency; and converting the first series of pulses into a second series of pulses at... Agent: Emerson Electric Co.

20110141771 - Electric power system including power converter and rotary transformer and method of assembling same: A method of assembling an electric power system includes coupling a power converter to an electric current source. The method also includes coupling a stationary portion of a rotary transformer to the power converter. The method further includes coupling a rotatable portion of the rotary transformer to a load device.... Agent:

20110141772 - Resonance power generator: A resonance power generator is provided. The resonance power generator includes an alternating current/direct current (AC/DC) rectifier to rectify an input signal of an alternating voltage and an AC generator to generate an AC signal based on the rectified signal that is output from the AC/DC rectifier. The resonance power... Agent: Samsung Electronics Co., Ltd.

20110141773 - Hvdc connection of wind turbine: A method and apparatus for connection of a wind driven turbine generator to an HVDC transmission line is provided that does not require transformation of the wind generated AC voltage to a nominal AC distribution grid frequency. An AC output from the turbine generator is increased in level and converted... Agent: General Electric Company

20110141774 - Variable speed drive: Systems and methods for improved VSDs are provided. One embodiment relates to an apparatus for common mode and differential mode filtering for motor or compressor bearing protection when operating with VSDs, including conducted EMI/RFI input power mains mitigation. Another embodiment relates to a method to extend the synchronous operation of... Agent: Johnson Controls Technology Company

20110141775 - Non-dissipative start up circuit: A start up circuit constituted of: a first alternating current lead; a second alternating current lead, said second alternating current lead exhibiting an opposing phase of said first alternating current lead; a first capacitor, a first end of said first capacitor coupled to said first alternating current lead; a second... Agent: Microsemi Corporation

20110141776 - Power supply with output overcurrent detection and error latch protection: A power supply employs an error detecting circuit to output an error signal when detecting an overvoltage or overcurrent occurred in one of output powers and employs a latch trigger circuit to cause the power supply to enter a latch mode when receiving the error signal. The power supply will... Agent:

20110141777 - Direct converting apparatus, method for controlling the same, and control signal generation device: In a direct converting apparatus including a converter and a plurality of inverters, substantial carrier frequencies of the plurality of inverters are made different from each other while performing an operation in synchronization with the converter. An original carrier has a carrier frequency twice as high as a carrier frequency... Agent:

20110141779 - Boost multilevel inverter system: A boost inverter includes a first capacitor for connection in parallel with a dc supply voltage; a second capacitor connected in series with the first capacitor; an energy transfer path including a transfer capacitor and switches connected to the transfer capacitor for cyclically transferring energy from the first capacitor to... Agent:

20110141778 - Switch controller for switching power supply and method thereof: A switch controller for switching power supply is coupled to an auxiliary winding of the switching power supply through a detecting resistor. The switch controller provides a detecting current passing through the detecting resistor for keeping the voltage level of a detecting signal transmitted by the detecting resistor higher than... Agent:

20110141780 - Digital pulse width modulator: A DPWM (1) has a locked loop (4) which receives an input clock signal and provides an out-of-phase delayed clock at the output of each cell in the loop (35). A multiplexer (5) selects one of the cell outputs at any one time. This allows the DPWM (1) to have... Agent:

20110141781 - Power supply continuous input voltage extender: A system and method for providing acceptable output power from a wide range of received power, comprising: outputting a received voltage as an output voltage if the received voltage does not exceed a threshold; and limiting the output voltage to the threshold if the received voltage exceeds the threshold. Limiting... Agent: Emerson Electric Co.

20110141783 - Control of four-leg transformerless uninterruptible power supply: A system and method for managing a 4 leg transformerless Uninterrupted Power Supply is disclosed. The system comprises a 3 leg inverter modulation signal generator that applies signals to a modulation circuit that generates a 4th leg modulation signal based on the applied 3 leg inverter modulation signal characteristics. The... Agent:

20110141782 - N-phase active bridge circuits including n-channel field effect transistors with active gate drive: An n-phase transistor active bridge circuit (BC) connectable between at least two input lines (103, 105, 1051, 1053, 1055) and a pair of output lines (134, 136, 1057, 1059). The BC comprises a plurality of field-effect transistors (FETs) of the same channel type. The FETs (102, 104, 106, 108, 1010,... Agent: Harris Corporation

20110141784 - Timing controlled ac to dc converter: A timing controlled converter for converting a time varying input signal to a regulated DC output voltage for application to a load circuit. A feedback loop is employed as a control means for switchably coupling the time varying input signal to the load circuit for controlled periods of time in... Agent: Alfred E. Mann Foundation For Scientific Research

20110141786 - Dc-link voltage balancing system and method for multilevel converters: A control system for a multilevel converter includes a differential mode current regulator, a neutral point (NP) controller and a PWM controller for generating switching pulses for the multilevel converter. The differential mode current regulator generates reference voltage command signals based on a difference between reference current command signals and... Agent: General Electric Company

20110141785 - Dc-to-ac power converting device: A power converting device is adapted for converting a DC voltage input from an external power source into an AC voltage output. The power converting device includes: a transformer having first and second windings each having opposite first and second ends; a clamp unit coupled to the external power source,... Agent: Hungkuang University

20110141787 - Method in frequency converter, and frequency converter: A method in connection with a frequency converter and a frequency converter, the frequency converter being arranged for periodic recurrent use. The method comprises steps for generating and storing in a memory an average heating of a power semiconductor of the frequency converter, caused by one loading period, determining a... Agent:

06/09/2011 > 14 patent applications in 9 patent subcategories. invention type

20110134662 - Blocking oscillator type converter: P

20110134663 - Power converter: A plurality of capacitors are interposed between ones of a plurality of input lines. The clamp capacitor is connected between two DC power supply lines. A current-source converter includes a plurality of switch devices, where x represents r, s and t. The switch device selects conduction/non-conduction through a first diode... Agent:

20110134665 - Low-voltage start up circuit and method for dc-dc boost converter: A start up circuit (4-1) for a boost circuit (10) includes an adjustable-duty-cycle oscillator (1-2) that turns on a switch transistor (MSW) connected to an inductor (L) receiving an input voltage (VIN). If a voltage (V9) of a junction between the transistor and the inductor exceeds a predetermined value corresponding... Agent: Texas Instruments Incorporated

20110134664 - Startup circuit and power converter employing the same: A startup circuit with reduced power dissipation, method of operating the same and a power converter employing the startup circuit. In one embodiment, the startup circuit for a controller includes a charge accumulation circuit having a resistor series-coupled to a capacitor and a first Schmitt trigger having an input coupled... Agent:

20110134666 - Redundant control method for a polyphase converter with distributed energy stores: An inverter having three phase modules with an upper valve arm and a lower valve arm having each at least three two-pole subsystems connected in series, which each subsystem having a storage capacitor, is controlled in the event of failure of one or more subsystems by setting the terminal voltage... Agent: Siemens Aktiengesellschaft

20110134667 - Redundant control method for a polyphase converter with distributed energy stores: The invention relates to a method for controlling a converter having at least two phase modules (100) that comprise an upper and a lower valve branch (T1, . . . , T6), each of which is equipped with at least three bipolar systems (10) connected in series, in case at... Agent: Siemens Aktiengesellschaft

20110134668 - Maximum power point tracking converter of new and renewable energy storage system and maximum power point tracking method: A maximum power point tracking (MPPT) converter of a new and renewable energy storage system for tracking and extracting a maximum power from a new and renewable energy to provide the maximum power to a DC link. The MPPT converter includes an MPPT controller changing a controlled variable for maximum... Agent: Samsung Sdi Co., Ltd.

20110134669 - Unbalanced voltage compensation method, unbalanced voltage compensator, three-phase converter control method, and controller of three-phase converter: In compensating for unbalanced voltages of three-phase AC, instantaneous values of wye-phase voltages 120° out of phase with each other are obtained from line voltages using a centroid vector operation, symmetrical component voltages of three-phase balanced system are obtained from the instantaneous values of wye-phase voltages, a compensation signal to... Agent: Kyosan Electric Mfg. Co., Ltd.

20110134670 - Control arrangement for a pfc power converter: In a PFC (power factor correction) control unit for controlling a PFC converter, a transconductance amplifier is coupled to receive a feedback signal representative of an output voltage of the PFC converter. The transconductance amplifier is coupled to generate an output error signal in response to the feedback signal. A... Agent: Power Integrations, Inc.

20110134671 - Ac/dc converter preloading circuit: In an AC/DC converter a preloading circuit is provided for a bridgeless boost converter, including a first diode D1 having its anode connected to a first AC input terminal of the AC/DC converter and having its cathode connected to a first DC output terminal of the AC/DC converter, a second... Agent: Aeg Power Solutions B.v.

20110134672 - Power conversion apparatus: A power conversion apparatus includes an inverter for converting DC power to AC power for supply to a load, a converter for converting AC power from an AC power supply to DC power for supply to the inverter, and a DC voltage converter for converting a voltage value of power... Agent:

20110134673 - Ac-dc converter and ac-dc conversion method: The present invention provides an AC-DC converter and AC-DC conversion method for converting an AC input provided by a power transfer winding. The AC-DC converter includes a rectifying means for rectifying the AC input into a rectified output, and a control means for controlling the rectifying means based on a... Agent: Convenientpower Hk Ltd

20110134674 - Active rectifier and method for energy harvesting power management circuit: An active rectifier (12) couples a first input voltage (Vin1) to a first electrode of a first transistor (M3) having a second electrode coupled to an output (4) conducting an output voltage (Vout), and couples a second input voltage (Vin2) to a first electrode of a second transistor (M4) having... Agent: Texas Instruments Incorporated

20110134675 - Current-source power converter using normally-on field effect transistors: The invention relates to a current-source power converter comprising, in its rectifier module (20) and/or its inverter module, switching legs equipped with normally-on field effect transistors (T1-T6, Q1-Q6) each controlled by a gate control device (CT1, CT2). The invention has the particular feature of a normally-open auxiliary switch (SW) placed... Agent: Schneider Toshiba Inverter Europe Sas

06/02/2011 > 6 patent applications in 4 patent subcategories. invention type

20110128759 - Bi-directional dc-dc converter and method for controlling the same: A bi-directional DC-DC converter has a transformer for connecting a voltage type full bridge circuit connected to a first power source and a current type switching circuit connected to a second power source. A voltage clamping circuit constructed by switching elements and a clamping capacitor is connected to the current... Agent:

20110128758 - Series resonant converter: A series resonant converter circuit that reduces power loss is provided that includes an inverter circuit having at least a pair of first and second switching elements that is connected between DC input terminals, a transformer connected to this inverter circuit, a resonant inductance means that are connected in series... Agent: Origin Electric Company, Limited

20110128760 - Apparatus and method for dc/ac systems to ride through grid transients: A converter system comprises a DC to AC converter, a maximum power point tracking device, and an array-side control. The DC link converts DC from a photovoltaic array to AC for a grid. The maximum power point tracking device is coupled to the array. The array-side control, which is coupled... Agent:

20110128761 - Continuously variable switched capacitor dc-dc voltage converter: A voltage converter is switched among two or more modes to produce an output voltage matching a reference voltage that can be of an intermediate level between discrete levels corresponding to the modes. The output voltage is compared with the reference voltage to determine whether to adjust the mode.... Agent: Skyworks Solutions, Inc.

20110128762 - Voltage conversion method in a continuously variable switched capacitor dc-dc voltage converter: In a voltage converter, a mode configuration is selected in response to a mode control signal using a switch matrix having two or more mode configurations. Each mode configuration corresponds to one of two or more output signal voltages. The output signal is compared with a reference signal to produce... Agent: Skyworks Solutions, Inc.

20110128763 - Power converting apparatus: A power converting apparatus is provided with three sets of half-bridge inverters (4a-4c) connected between output terminals of a solar battery (1), each of the half-bridge inverters (4a-4c) including two series-connected switching devices, single-phase inverters (5a-5c) connected to individual AC output lines of the bridge inverters (4a-4c), and two series-connected... Agent: Tokyo Institute Of Technology

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