Electric power conversion systems patents - Monitor Patents
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Electric power conversion systems

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.
  
07/24/2014 > 31 patent applications in 21 patent subcategories.

20140204613 - Providing control power with a photovoltaic system: For controlling a photovoltaic system connected to an AC power grid and including a photovoltaic generator and an inverter, electric power which includes positive and negative dynamic control power is transferred by means of the inverter between the photovoltaic generator and the AC power grid as a function of a... Agent:

20140204614 - Rectified high frequency power supply with low total harmonic distortion (thd): A method and apparatus that performs AC to DC power conversions without creating significant 50 or 60 Hz harmonic currents and voltage distortions on the AC power source conductors thus minimizing the need for ancillary harmonic filtering of 50 or 60 Hz harmonics. The method and apparatus is embodied in... Agent:

20140204616 - Galvanically isolated dc/dc converter and method of controlling a galvanically isolated dc/dc converter: A galvanically isolated DC/DC converter includes at least one first side converter circuit coupled between a pair of first side DC terminals, and at least one second side converter circuit coupled between a pair of second side DC terminals. The second side converter circuit has at least a first and... Agent: L-3 Communications Magnet-motor Gmbh

20140204617 - Power converter with current feedback loop: In a power converter, a deviation calculator calculates, in each cycle, a deviation between a value of an input electrical parameter of a switch circuit and a target value selected by a selector in a previous cycle. The input electrical parameter depends on the input power to the switch circuit.... Agent: Denso Corporation

20140204618 - Transformer sub-circuit: A transformer sub-circuit for use in an electrically operated vehicle includes a bridge circuit which has at least four MOSFETs and capacitors connected in parallel with the MOSFETs, and an inductor connected to the bridge circuit for use as a primary side of a transformer. A control device or controller... Agent: Siemens Aktiengesellschaft

20140204615 - Voltage converter with low starting voltage: The present invention relates to a voltage converter circuit for transforming a low voltage applied to its input into a higher output voltage at an output. The voltage converter circuit comprises at least one first to fourth controllable switch of a first type, which are connected to each other in... Agent: Albert-ludwigs-universitat Freiburg

20140204621 - Apparatus for regulating an energy system and method for operating an energy system: The present invention provides compensation of rapid fluctuations in voltage in a DC-to-DC converter. For this, the primary side of the DC-to-DC converter is monitored by means of capacitive voltage dividers. A voltage fluctuation occurring in the process can be identified early and thereupon the DC-to-DC converter can be controlled... Agent:

20140204620 - Converter: A converter for transferring energy from a voltage supply to an output includes transformer T1, coupled inductor L1, switch S1, energy recovery capacitor C, and energy recovery winding T1b. Secondary winding T1c transfers energy from the supply to the output when primary winding T1a is connected to the voltage supply.... Agent: Tdk-lambda Uk Limited

20140204619 - Energy conversion architecture with secondary side control delivered across transformer element: A switched mode power converter is configured having predominate secondary side control. A primary side driving circuit is configured as a responsive state machine the output of which is input as the driving signal for a main switch. An output voltage, current or power is sensed and the secondary side... Agent: Flextronics Ap, LLC

20140204622 - Reconstruction pulse shape integrity in feedback control environment: A switched mode power converter includes a closed loop feedback control mechanism for regulating an output characteristic and a resonant type circuit for inclusion of resonant energy delivery. The characteristic impedance of the resonant type circuit is modified from an optimal energy transfer configuration to one that dampens fluctuations in... Agent: Flextronics Ap, LLC

20140204623 - Charging circuit for a power converter controller: A controller includes a first controller terminal, a second controller terminal, a first p-channel metal-oxide-semiconductor field-effect transistor, and a second pMOS transistor. The first controller terminal is to be coupled to a bypass capacitor coupled to a secondary side of an isolated power converter. The second controller terminal to be... Agent: Power Integrations, Inc.

20140204624 - Power converter controller with multiple power sources: A controller includes a bypass terminal, a first power circuit, a second power circuit, and a charging control circuit. The bypass terminal is to be coupled to a bypass capacitor coupled to a secondary side of an isolated power converter. The first power circuit is coupled to the bypass terminal... Agent:

20140204625 - Secondary controller for use in synchronous flyback converter: A secondary controller for use in a synchronous flyback converter includes a comparator, a drive circuit, and logic circuitry. The comparator is coupled to generate a compare signal in response to a comparison of a threshold to an input signal representative of a secondary winding voltage of the synchronous flyback... Agent: Power Integrations, Inc.

20140204626 - Receive circuit for use in a power converter: A receive circuit for use in a power converter controller includes a first amplifier coupled to receive an input pulse. A second amplifier is coupled to a first output of the first amplifier. The first output is coupled to be responsive to the input pulse and to a second output... Agent: Power Integrations, Inc.

20140204628 - Multi-stage sampling circuit for a power converter controller: An example controller for a power converter includes a track and hold circuit, a sample and hold circuit, and drive logic. The track and hold circuit receives a signal that is representative of an output voltage of the power converter. The track and hold circuit includes a first capacitor that... Agent: Power Integrations, Inc.

20140204627 - Systems and methods for driving a bipolar junction transistor by adjusting base current with time: System and method for driving a bipolar junction transistor for a power converter. The system includes a current generator configured to output a drive current signal to a bipolar junction transistor to adjust a primary current flowing through a primary winding of a power converter. The current generator is further... Agent: On-bright Electronics (shanghai) Co., Ltd.

20140204629 - Acpower pupply power circuit: An AC power supply power circuit comprises a power input unit connected to a DC/AC converter. The AC/DC converter is connected to a DC/DC circuit, and the DC/DC circuit is further connected to an adjustable DC voltage regulation circuit. The adjustable DC voltage regulation circuit is connected to an amplifier... Agent: Chyng Hong Electronic Co.

20140204632 - Bypassed cascaded cell converter: In a converter for converting energy from a generator to a power network, wherein the converter comprises multiple power modules, wherein each power module includes at least two power cells and a transformer for connecting the power cells to the power network, wherein each power cell includes a phase input,... Agent: Det International Holding Limited

20140204630 - Current balance control for non-interleaved parallel bridge circuits in power converter: Systems and methods for reducing current imbalance between parallel bridge circuits used in a power converter of a power generation system, such as a wind driven doubly fed induction generator (DFIG) system, are provided. The power converter can include a plurality of bridge circuits coupled in parallel to increase the... Agent: General Electric Company

20140204631 - Power converter with low standby power consumption: A power converter for converting an AC input of between frequency F1 at voltage V1 and frequency F2 at voltage V2 into a stable AC output of frequency F3 and voltage V3 comprises an AC/DC/AC/AC/DC converter (100) that converts the AC input power (between F1, V1 to F2, V2) into... Agent:

20140204633 - Distributed power generation interface: Described herein are methods, systems, and apparatus for a controller for a power circuit that interfaces distributed power generation with a power distribution grid, comprising: a first portion, including a maximum power point tracker, that receives signals corresponding to the distributed power generation voltage and current, and outputs to the... Agent: Sparq Systems Inc.

20140204634 - Power supply apparatus: A power supply apparatus capable of setting a ripple current to be not more than an acceptable value regardless of an input voltage is obtained. The apparatus calculates switching frequency by a current detected by a current detector so that the switching frequency is set to be low if the... Agent: Mitsubishi Electric Corporation

20140204635 - Ac-dc converter: An AC-DC converter includes two series circuits, an inductor, and a common snubber circuit. Each series circuit includes a switch and a current block device. The block device blocks a current from its high potential side to its low potential side when the first device is closed and allows the... Agent: Denso Corporation

20140204636 - Current limiting control method for diode neutral-point-clamped three-level inverter and related circuit: The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and... Agent: Huawei Technologies Co., Ltd.

20140204637 - Standby power reduction device: A standby power reduction device is provided, including a capacitor connected in parallel to a main switch controlling a switching mode power supply, without the necessity of providing a starting circuit, thereby reducing the cost and enabling miniaturization of product.... Agent: Korchip Corporation

20140204638 - Power supply apparatus with low power in standby mode: Provided is a power supply apparatus with low power in a standby mode. The apparatus includes a voltage multiplier configured to multiply an input voltage and including a first terminal through which the multiplied voltage is output and a second terminal through which a voltage lower than a voltage of... Agent: Samsung Electronics Co., Ltd.

20140204640 - Method and apparatus for changing a frequency of a switch prior to a level of current received from an inductor decreasing to a predetermined level: A controller including a switch, a first module, a second module, and a control module. The switch receives current from an inductor and bypasses a portion of the current from being received by a load. The switch is cycled between a first state and a second state at a frequency.... Agent:

20140204639 - Power supply apparatus: A power supply apparatus mainly includes a secondary side controller, a digital isolator, a plurality of isolation sensing units, and a driving unit. The secondary side controller is configured to isolatedly measure voltages and currents, and is configured to isolatedly control the driving unit. The power supply apparatus includes a... Agent: Chicony Power Technology Co., Ltd.

20140204641 - System for regulating the output of a high-voltage, high-power, dc supply: A system for regulating the output of a high-voltage, high-power DC supply, the system includes a high-voltage DC power supply, a storage capacitor, and at least one non-dissipative regulator having an output voltage range less than an output voltage range of the high-voltage DC power supply. The regulator includes an... Agent: Diversified Technologies, Inc.

20140204642 - Inverter circuit: An inverter circuit 40 with reduced loss in semiconductor elements when starting up, having switching elements Q1 and Q2 in series, and connected to both ends of a direct current power source circuit 30 having direct current power sources Psp and Psn in series, and including an alternating current output... Agent: Fuji Electric Co., Ltd.

20140204643 - Control scheme for current balancing between parallel bridge circuits: A control scheme for reducing current imbalance between parallel bridge circuits in a power converter system is provided. The power converter can include a plurality of bridge circuits coupled in parallel to increase the output power capability of the power system. The parallel bridge circuits can be controlled pursuant to... Agent: General Electric Company

  
07/17/2014 > 18 patent applications in 14 patent subcategories.

20140198533 - Bidirectional power conversion with fault-handling capability: A power conversion system includes a unipolar bidirectional power converter with DC terminals and a first controller, and a bipolar bidirectional power converter with DC terminals connected in series with the DC terminals of the unipolar bidirectional power converter and a second controller. The first controller is operable to cause... Agent: Abb Research Ltd.

20140198534 - Converter: The present invention relates to a converter for transferring power between a first DC system of DC voltage V1 and a second DC system of DC voltage V2, the converter comprising: —a first AC/DC converter for transforming DC voltage V1 into a first single phase AC voltage V1ac, of frequency... Agent: University Court Of The University Of Aberdeen

20140198535 - Method and apparatus for controlling programmable power converter with low standby power loss: Method and apparatus for controlling a programmable power converter are provided. The method and apparatus generate a first power source and a second power source. The voltage level of the second power source is lower than the voltage level of the first power source. The first power source and the... Agent: System General Corp.

20140198537 - Power conversion apparatus: A power conversion apparatus includes a switch circuit which activates switching elements on the basis of a control signal, a feedback means which performs feedback control, a signal output means which outputs the control signal on the basis of a control variable of the feedback control, and a mode switching... Agent: Denso Corporation

20140198536 - Resonant converters and methods: A multilevel LLC resonant converter comprises a resonant tank connected in series with a primary side of a transformer, a first switch and a second switch connected in series, wherein a common node of the first switch and the second switch is coupled to a mid-voltage point through a first... Agent: Futurewei Technologies, Inc.

20140198538 - Power converter with current feedback loop: In a power converter, a driver drives a switching element using a manipulated variable therefor to convert input power into output power. A first measuring unit measures a value of a first electric parameter depending on the input power. A first determiner determines, from the measured value of the first... Agent: Denso Corporation

20140198540 - Integrated switch mode power supply controller and switch mode power supply using the same: In one embodiment, an integrated switch mode power supply controller can include: a multiplexing pin that receives a detection voltage signal; a switch mode power supply that receives a DC input voltage, and operates in a switching cycle having first, second, and third time intervals; during the first time interval,... Agent: Silergy Semiconductor Technology (hangzhou) Ltd

20140198539 - Systems and methods for zero voltage switching in power conversion systems: System and method for regulating a power converter. A system for regulating a power converter includes a controller, a first switch, and a second switch. The controller is configured to generate a first switching signal and a second switching signal. The first switch is configured to receive the first switching... Agent: On-bright Electronics (shanghai) Co., Ltd.

20140198541 - Power supply and image forming apparatus: The power supply includes a transformer, a first switching element for performing a switching operation of turning on and off a voltage input to a primary side of the transformer, a second switching element to be connected to a secondary side of the transformer so as to be turned on... Agent: Canon Kabushiki Kaisha

20140198542 - Single-phase active front end rectifier system for use with three-phase variable frequency drives: A voltage source inverter comprises a rectifier having an input for receiving single-phase AC power from an AC source and converting the AC power to DC power on a DC bus. The DC bus has first and second rails to provide a relatively fixed DC voltage. A DC bus capacitor... Agent: Yaskawa America, Inc.

20140198543 - Power supply with dc breaker switch and reduced regulated dc link voltage: DC link voltage to the output stage circuit, the level of the DC link voltage based on switching states of the breaker switch. The breaker circuit may further include a control circuit configured to generate a gate control signal to control the switching states of the breaker switch, the gate... Agent: Fairchild Semiconductor Corporation

20140198544 - Contactless power supply device: In order to obtain a contactless power supply device which, even when a spatial gap between a primary winding and a secondary winding varies, is capable of not only accurately detecting whether or not the primary winding and the secondary winding come into the position opposite to each other, but... Agent: Mitsubishi Electric Corporation

20140198545 - Power-conversion engine: The disclosure provides a power converter and method for controlling same, comprising a plurality of switch elements, an inductive reactor, and at least two ports for the movement of electrical energy. Any energy-moving port may be made unipolar, bidirectional, bipolar, or bidirectionally bipolar. Ports may be equipped with sensing circuitry... Agent: Cognipower, LLC

20140198546 - Master-slave interleaved bcm pfc controller and control method thereof: The present invention relates to a master-slave interleaved BCM PFC controller for controlling a PFC circuit with master and slave channels. In one embodiment, the PFC controller can include: a master channel controller that generates a master channel control signal and an inverted master channel control signal; a first phase... Agent: Silergy Semiconductor Technology (hangzhou) Ltd

20140198547 - Multilevel inverter: There is provided a multilevel inverter capable of easily perform balancing of voltages by way of controlling switching of voltage dividing based on an offset between voltages divided by capacitors of a voltage dividing circuit. The multilevel inverter includes: a voltage dividing unit including a plurality of capacitors for dividing... Agent: Samsung Electro-mechanics Co., Ltd.

20140198548 - System and method for power conversion: A converter includes a first converter module and a second converter module coupled to the first converter module in a nested manner. Each of the first converter module and the second converter module includes a plurality of switch units. When the converter is operated to perform power conversion, at least... Agent:

20140198549 - Energy dissipating device for dc power supplies: An energy dissipating device configured to connect to a power supply and to dissipate excess energy from a direct current (DC) rail in response to a change in power supply settings or operating characteristics. The energy dissipating device is connected to the DC rail, which conducts current generated by an... Agent: Agilent Technologies, Inc.

20140198550 - Frequency multiplier: An apparatus is provided. A differential pair of transistors is configured to receive a first differential signal having a first frequency, and a transformer, having a primary side and a secondary side is provided. The primary side of the transformer is coupled to the differential pair of transistors, and the... Agent: Texas Instruments Incorporated

  
07/10/2014 > 19 patent applications in 16 patent subcategories.

20140192560 - Duty cycle balance module for switch mode power converter: A duty cycle balance module (DCBM) for use with a switch mode power converter. One possible half-bridge converter embodiment includes a transformer driven to conduct current in first and second directions by first and second signals during and second half-cycles, respectively. A current limiting mechanism adjusts the duty cycles of... Agent: Analog Devices Technology

20140192561 - Control circuit for switching power converters with synchronous rectifiers: A control circuit for switching power converters with synchronous rectifiers is disclosed for providing start-up and shut-down protection. The control circuit for switching power converters with synchronous rectifiers includes a means for blocking the driving signals to the synchronous rectifiers, a voltage sampling circuit, a reference voltage, and a comparator.... Agent: Alcatel-lucent Canada Inc.

20140192562 - Single stage ac/dc converter: A single stage AC/DC converter includes a rectifier to rectify an input AC voltage and output the input AC voltage from first and second input nodes to first and second output nodes, an input capacitor connected between the first and second output nodes to store a rectified voltage and output... Agent: Lg Innotek Co., Ltd

20140192563 - Dual-mode switching power control device: A dual-mode switching power control device includes an electric transformer, a PWM driving controller, a switching transistor, an isolation element, an output diode and an output capacitor. The PWM driving controller is connected to the switching transistor coupled to the electric transformer. The first side inductor of the electric transformer... Agent: Inno-tech Co., Ltd.

20140192565 - Circuit with synchronous rectifier for controlling programmable power converter: A control circuit of a power converter and a method for controlling the power converter are provided. The control circuit of the power converter comprises a switching circuit and a temperature-sensing device. The switching circuit generates a switching signal in response to a feedback signal, and the switching circuit generates... Agent: System General Corp.

20140192564 - Switching power converting apparatus: A switching power converting apparatus is capable of converting an input voltage to an output voltage, and includes a transformer, a primary side control module, and a secondary side control module. The secondary side control module utilizes voltage clamping techniques or current-drawing techniques to stop self-excited conversion from the input... Agent: Richtek Technology Corp.

20140192566 - Primary-side controlled programmable power converter: A circuit for controlling a programmable power converter is provided. The circuit comprises a control circuit, a switching controller, and a first opto-coupler. The control circuit generates a programmable voltage-reference signal for regulating an output voltage of the programmable power converter. A feedback circuit of the control circuit detects the... Agent: System General Corporation

20140192567 - Methods for controlling electrical inverters and electrical inverters and systems using the same: A system for generating a duty cycle control signal for controlling an inverter power train providing an output current waveform to a grid operating with a grid voltage waveform compares a reference current waveform shaped to the grid voltage waveform with the output current waveform to generate an error signal.... Agent: Aeg Power Solutions Bv

20140192568 - Inverter for a distributed power generator: Provided is a maximum power point (MPP) tracker for a PV cell inverter, and a PV cell inverter. The MPP tracker decouples output power oscillations from the input power generation and extracts maximum available power from the PV cell. The PV cell inverter uses the MPP tracker and generates a... Agent: Sparq Systems Inc.

20140192569 - Overvoltage protection circuit: Apparatus and methods for generating an overvoltage signal from a bias winding signal of a power converter transformer are disclosed. In one example, an overvoltage protection circuit may include a current augmentation circuit and a detection circuit. The current augmentation circuit may be coupled to receive the bias winding signal,... Agent:

20140192570 - Power generation system and method for operating a power generation system: According to an embodiment, a power generation system is provided comprising a power generator; a plurality of converter modules, each converter module having a DC link, wherein the DC link of each converter module is connected to the DC links of the other converter modules of the plurality of converter... Agent: Vestas Wind Systems A/s

20140192571 - Wide input voltage range power supply circuit: An under voltage lockout circuit configured to set a minimum turn-on voltage for a load is provided. The circuit includes an input terminal configured to receive an input voltage. The circuit includes a first transistor configured to become conductive to supply the input voltage to the load when an input... Agent:

20140192573 - Power conversion circuit: A power conversion circuit includes a high side switching device connected at its collector to the high potential side of a power supply, a low side switching device connected at its emitter to the lowpotential side of the power supply, a first junction to which the emitter of the high... Agent: Mitsubishi Electric Corporation

20140192572 - Power converter capable of outputting a plurality of different levels of voltages: A power converter includes a group of serial three-level inverters including 2n (n=2) three-level inverters connected in series, two switch circuits for selecting an output from either one of two of the three-level inverters in the group of serial three-level inverters, and a switch circuit for selecting an output from... Agent: Toshiba Mitsubishi-electric Industrial Sys. Corp.

20140192574 - Technique for reducing power consumed by electric equipment: When an image forming apparatus shifts to a power saving mode, a controller unit further reduces power consumption by switching AC current on/off every predetermined amount of time. When AC current input from a commercial AC power supply is turned off, a DC voltage generating circuit normally can no longer... Agent: Canon Kabushiki Kaisha

20140192575 - Method of forming a synchronous rectifier controller and structure therefor: In one embodiment, a synchronous rectifier controller is configured to initiate forming an off-time interval for a first period of time responsively to the controller forming a disable state of a switching signal wherein the control circuit maintains the switching signal in the disable state for at least the off-time... Agent:

20140192576 - Voltage regulator: Provided are improvements for systems and methods of alternating current (AC) to direct current (DC) power regulation. The system improvements include a regulation circuit having a microprocessor that controls a silicon controlled rectifier circuit. Method improvements include one or more of SCR load sharing, adaptive voltage droop compensation, and/or voltage... Agent: Trumpet Holdings, Inc.

20140192577 - Power conversion device: In the present invention, a power conversion device is provided with an inverter for converting power output from a power source; a first power supply bus, connected to the positive electrode side of the inverter and the power source; a second power supply bus, connected to the negative electrode sides... Agent: Nissan Motor Co., Ltd.

20140192578 - Power converter: Provided is a power converter 3 that directly converts polyphase AC power to AC power. A converter circuit has a plurality of first switching elements 311, 313 and 315 that are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on... Agent: Nissan Motor Co., Ltd

  
07/03/2014 > 22 patent applications in 18 patent subcategories.

20140185326 - Power conversion device: There is disclosed a power conversion apparatus 3 for converting polyphase ac power directly to ac power. A conversion circuit includes a plurality of first switching devices 311, 313, 315 and a plurality of second switching devices 312, 314, 316 connected, respectively, with the phases R, S, T of the... Agent: Nissan Motor Co., Ltd.

20140185327 - High power density off-line power supply: A power supply is provided, the power supply including a filter stage configured to receive an AC input voltage, a bridge circuit configured to rectify the filtered AC input voltage, an AC/DC converter, and a DC/DC converter. The AC/DC converter includes a primary transistor and an auxiliary circuit including an... Agent: Avogy, Inc

20140185328 - Apparatus and method for avoiding transformer saturation: A controller for a power converter includes one or more controller modules operably linked to a transformer core of the power converter, to primary bridge switches of the power converter, and to secondary bridge switches of the power converter, wherein the one or more controller modules are configured to avoid... Agent: General Electric Company

20140185329 - Power supply apparatus: There is provided a power supply apparatus including an interleaved active clamp forward converter unit including a first active clamp forward converter and a second active clamp forward converter, and an output unit magnetically coupled to the forward converter unit and having an output path according to a duty ratio... Agent: Samsung Electro-mechanics Co., Ltd.

20140185330 - Dc to dc power converting device: A power converting device includes a switching unit, a resonant unit, a converting unit, a rectifying and filtering unit, an inductance-sensing unit, and a driver. The resonant unit is electrically connected to the switching unit and includes a resonant capacitor, a resonant inductor, and a variable magnetizing-inductor having at least... Agent: Chicony Power Technology Co., Ltd.

20140185331 - Active forward mode rectifier: A power converter includes a transformer having a primary winding and a secondary winding, a primary side circuit coupled to the primary winding, and a secondary side circuit coupled to the secondary winding and configured to output a substantially direct current (DC) output. The primary side circuit is configured to... Agent:

20140185332 - Switching power supply circuit: A switching power supply circuit (101) includes a first rectifier circuit (102) converting an alternate current to a direct current, a switching operator (20), a switching transformer (103) including a primary coil supplied with a switched current and a secondary coil inducing power corresponding to the current, a second rectifier... Agent: Panasonic Corporation

20140185333 - Active clamp circuits for flyback power converters: An active clamp circuit for a flyback power converter is provided. The active clamp circuit includes a power transistor, a capacitor, a high-side transistor driver, a charge-pump circuit, and a controller. The power transistor is coupled in series with a capacitor to develop an active-clamper. The active-damper is coupled in... Agent: System General Corporation

20140185334 - Switching power supply: Aspects of the invention provide a switching power supply in which frequency reduction control in a light load condition both in a power factor correction converter and a DC-DC converter restrains energy loss and achieves optimum efficiency. A switching power supply can include a power factor correction converter and a... Agent: Fuji Electric Co., Ltd.

20140185335 - Power converter system with synchronous rectifier output stage and reduced no-load power consumption: A power converter circuit may convert alternating current signals into direct current signals. A load may be powered from output terminals that are provided with the direct current signals. The power converter circuit may have a transformer with primary and secondary sides. A transistor on the primary side may be... Agent: Apple Inc.

20140185336 - Switching power supply apparatus and method of controlling switching power supply apparatus: A switching power supply apparatus includes a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching element coupled in series to the primary winding; an output circuit section generating a voltage output from power transferred from the primary winding to the secondary winding in response... Agent: Sanken Electric Co., Ltd.

20140185337 - Transverse shield wire for energy transfer element: Energy transfer elements having a shield to reduce EMI while maintaining a low profile are disclosed. In one example, the transformer may include a transverse shield wire that may be utilized to keep displacement current within the energy transfer element. While windings of the energy transfer element are generally wound... Agent:

20140185338 - Balancing power grid parameters using distributed energy control: Described embodiments include a system and a method. A system includes an energy storage device configured to store and release energy. The system includes a waveform sensor configured to detect a second harmonic or higher frequency component deviation in a waveform of electric power supplied to the system by an... Agent: Elwha LLC

20140185339 - Power factor correction circuit: There is provided a power factor correction circuit including: a power conversion circuit unit controlling an inductor current according to a switching signal applied to a main switch to convert an external input voltage into an output voltage having a predetermined range; an imbalance detection circuit outputting an imbalance state... Agent: Samsung Electro-mechanics Co., Ltd.

20140185340 - Switching power supply: In some aspects of the invention, a switching power supply can include a control circuit that conducts feedback control of a pulse width of a driving signal for switching the switching element according to an output voltage and settle the output voltage to a specified voltage level; a frequency reducing... Agent: Fuji Electric Co., Ltd.

20140185341 - Dc to ac power conversion apparatus and method thereof: A DC-to-AC power conversion method is provided, including: generating an AC reference signal and an AC zero crossing detection signal; generating an error signal based on the AC reference signal and an output current or an output voltage at an AC output terminal; generating a turn-off signal based on the... Agent:

20140185342 - Electrical supply apparatus with current waveform signal and method for operating the electrical supply apparatus: D

20140185343 - Switching mode power supply and control method thereof: There is provided a switching mode power supply having primary and secondary induction coils inductively coupled to each other and converting a voltage applied to the primary induction coil to supply the converted voltage to the secondary induction coil, the switching mode power supply including a power switching unit switching... Agent: Samsung Electro-mechanics Co., Ltd.

20140185344 - Method and apparatus for determining a corrected monitoring voltage: A method and apparatus for correcting a locally measured inverter voltage. In one embodiment, the method comprises determining a voltage compensation to compensate for a voltage drop along an AC bus between an inverter and a remotely located point on the AC bus; obtaining a voltage measurement at the inverter;... Agent: Enphase Energy, Inc.

20140185345 - Method and apparatus for three port line frequency energy storage: A method and apparatus for power conversion comprising a three-port converter comprising a DC port for coupling to an external DC line, an AC port for coupling to an external AC line, and a storage port, internal to the three-port converter, for storing excess energy and discharging needed energy during... Agent: Enphase Energy, Inc

20140185347 - Compound semiconductor device and manufacturing method therefor: An HEMT includes, on an SiC substrate, a compound semiconductor layer, a silicon nitride (SiN) protective film having an opening and covering the compound semiconductor layer, and a gate electrode formed on the compound semiconductor layer so as to plug the opening. In the protective film, a projecting portion projecting... Agent: Fujitsu Limited

20140185346 - Hybrid power devices and switching circuits for high power load sourcing applications: A hybrid switching circuit includes first and second switching devices containing first and second unequal bandgap semiconductor materials. These switching devices, which support parallel conduction in response to first and second control signals, are three or more terminal switching devices of different type. For example, the first switching device may... Agent: Eaton Corporation

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