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.
04/10/2014 > 20 patent applications in 13 patent subcategories.

20140098570 - Controller for controlling a power converter to output constant power and related method thereof: A controller for controlling a power converter to output constant power includes a current sensing module, a voltage generation module, and a voltage regulation module. The current sensing module generates a sensing current according to an output current flowing through a secondary side of the power converter. The voltage generation... Agent: Leadtrend Technology Corp.

20140098569 - Method and apparatus for digital isolation using planar magnetic circuits: A digital isolation circuit includes an encode circuit, a planar magnetic circuit, and a decode circuit. The encode circuit receives an input signal and divides the input signal into a first signal pulse and a second signal pulse. The planar magnetic circuit is coupled to an output of the encode... Agent: Tyco Electronics Corporation

20140098573 - Dc/dc converter: A DC/DC converter is coupled between a DC source and a load. The DC/DC converter includes a first charge pump circuit coupled to the DC source, a second charge pump coupled to the load, a first switch coupled to the first charge pump circuit, a second switch coupled to the... Agent: National Tsing Hua University

20140098572 - Forward boost power converters and methods: Forward boost power converters, and related methods, are disclosed. In a switching mode power converter coupled between a first terminal pair and a second terminal pair, a first inductance is coupled to a first switch in a first circuit path across the first terminal pair. A capacitance is coupled to... Agent: Solantro Semiconductor Corp.

20140098571 - Saturation prevention in an energy transfer element of a power converter: A controller for use in a power converter includes logic circuits to turn on and off a switch to regulate an output quantity. A first integrating capacitor is charged with a combination of a first current and a second current while the switch is turned on. The first current is... Agent: Power Integrations, Inc.

20140098575 - High voltage dc/dc converter with cascaded resonant tanks: A converter, for use in high voltage direct and alternating current power transmission comprises a primary charge transfer converter. The charge transfer converter includes first and second primary terminals for connection to one or more electrical networks. The primary charge transfer converter also includes a plurality of charge transfer elements... Agent: Alstom Technology Ltd

20140098574 - Switching power supply device: A switching power supply includes a series resonant circuit that includes a resonant inductor and a resonant capacitor connected in series with a primary winding of a converter transformer. By controlling turning on and off of first and second switching elements in a complementary manner, current is supplied to the... Agent: Murata Manufacturing Co., Ltd.

20140098576 - Load change detection for switched mode power supply with low no load power: A pulse scheme is used for load change detection in a switching mode power supply with low no-load power consumption. The pulse scheme includes a measurement pulse for determining a load condition or a no-load condition at the output. Generation of the measurement pulse results in sufficient energy transfer to... Agent: Flextronics Ap, LLC

20140098577 - Method to control a minimum pulsewidth in a switch mode power supply: A power converter circuit includes a transformer and a main switch controller by a primary side controller. A sensing circuit is implemented that senses the voltage at an auxiliary winding of the transformer while the main switch is ON. The auxiliary winding is another winding on the primary side of... Agent: Flextronics Ap, LLC

20140098578 - Switched mode power supplies: An example embodiment relates to a switched-mode power supply comprising a transformer with a first winding and a second winding. There is a transmitter configured to: detect a detectable variable (Vout) at the first winding, generate a transformer relayed signal in accordance with the detectable variable (Vout), and provide the... Agent: Nxp B.v.

20140098579 - Switched-mode power supply: Consistent with example embodiments disclosed, there are switched-mode power supplies (SMPS) in which a signaling capacitor transmits information across a transformer of the power supply. Such embodiments can avoid drawing power from the output capacitor in order to provide communication signals and so do not cause a drop in the... Agent: Nxp B.v.

20140098580 - Power control circuit and power supply system employing the same: A power control circuit for a power supply system including a control unit, a driving circuit and a power supply unit is disclosed. The power control circuit includes a current detection unit, a voltage detection unit and a power detection unit. The current detection unit is used for detecting a... Agent: Delta Electronics, Inc.

20140098581 - Gate driving circuit having a fault detecting circuit for a semiconductor switching device: Aspects of the invention are directed to a gate driving circuit for a power conversion circuit having an upper and lower arm circuit composed of series-connected upper arm and a lower arm, each arm including two or more semiconductor switching devices connected in series. In some aspects, a gate driving... Agent: Fuji Electric Co., Ltd.

20140098582 - Bridge rectifier circuit: A bridge rectifier circuit has first to fourth diode groups which are bridge-connected and each include a main diode and sub-diodes being enabled to be respectively connected in parallel to the main diode, first and second input terminals to which AC power is supplied, a first output terminal connected to... Agent: Fujitsu Semiconductor Limited

20140098583 - Power source apparatus: A power source apparatus includes: a first series circuit that has a first rectifier element, a first switching element, and a third rectifier element; a second series circuit that has a second rectifier element, a second switching element, and a fourth rectifier element; a reactor connected between a connecting point... Agent: Minebea Co., Ltd.

20140098584 - Passive power factor correction incorporating ac/dc conversion: A passive power factor correction (PFC) circuit is disclosed. It converts an AC input voltage into at least one DC output voltage. A diode bridge and a diode pair rectify the AC input voltage and provide first and second rectified voltages, respectively. A resistor applies the second rectified voltage to... Agent: Teledyne Technologies Incorporated

20140098585 - Rectifying circuit and semiconductor device: According to one embodiment, a rectifying circuit includes a transistor, a rectifying element and a resistor. The transistor includes a control electrode, a first electrode and a second electrode. The rectifying element includes an anode electrode and a cathode electrode. The cathode electrode is electrically connected to the first electrode.... Agent:

20140098586 - Gate driving circuit and inverter having the same: There is provided an inverter including: an inverter unit including at least one inverter arm having a plurality of switches, and switching the input power according to control to output an alternating current power; at least one driving unit including at least one high voltage gate driving unit having a... Agent: Samsung Electro-mechanics Co., Ltd.

20140098587 - Multilevel converter circuit: In some aspects of the invention, a number of semiconductor switches through which output current passes can be reduced between a direct current power source side, which is an input, and an alternating current output, thus achieving loss reduction, and enabling higher efficiency, price reduction, and miniaturization of a device.... Agent: Fuji Electric Co., Ltd.

20140098588 - Power module and power conversion apparatus using same: A power module includes a plurality of semiconductor devices constituting upper/lower arms of an inverter circuit, a plurality of conductive plates arranged to face electrode surfaces of the semiconductor devices and a module case configured to accommodate the semiconductor devices and conductive plates, wherein the module case includes a heat-radiation... Agent: Hitachi Automotive Systems, Ltd.

04/03/2014 > 31 patent applications in 22 patent subcategories.

20140092633 - Electromechanical inductors and transformers: Devices and systems for power electronic circuits are provided. Embodiments of the present invention enable high density inductive energy storage by using electromechanical coupling between an electrically conducting inductive element and a mechanical resonator to passively store energy via both electromagnetic and mechanical mechanisms. A microelectromechanical inductor (MEMI) is provided... Agent: University Of Florida Research Foundation, Incorporated

20140092639 - Bidirectional dc-dc converter and control method thereof: Disclosed is a small-size, high-efficiency, isolated, bidirectional DC-DC converter. The bidirectional DC-DC converter includes a transformer in which windings are magnetically coupled, switching circuits, a diode which is connected in parallel with a switch, smoothing capacitors, and a control section. First and second DC power supplies, which are connected in... Agent: Hitachi Information & Telecommunication Engineering, Ltd.

20140092635 - Compound semiconductor device and method of manufacturing the same: An AlGaN/GaN HEMT includes: a compound semiconductor layer; a source electrode and a drain electrode formed on an upper side of the compound semiconductor layer; and an Al—Si—N layer being a high-resistance layer disposed in a lower portion of at least one of the source electrode and the drain electrode... Agent: Fujitsu Limited

20140092636 - Compound semiconductor device and method of manufacturing the same: A gate electrode is formed above a compound semiconductor stacked structure, and the gate electrode includes a stack of a TaN:Al layer in which Al is solid-dissolved in TaN, a TaAlN layer made of a compound of TaN and Al, and an Al layer.... Agent: Fujitsu Limited

20140092637 - Compound semiconductor device and method of manufacturing the same: A compound semiconductor device includes: a compound semiconductor layered structure; a gate electrode formed above the compound semiconductor layered structure; a first protective insulating film that covers a surface of the compound semiconductor layered structure and is made of silicon nitride as a material; a second protective insulating film that... Agent: Fujitsu Limited

20140092638 - Compound semiconductor device and method of manufacturing the same: An AlGaN/GaN.HEMT includes: a compound semiconductor layered structure; and an interlayer insulating film that covers a surface of the compound semiconductor layered structure, the interlayer insulating film including a first insulating film and a second insulating film that is formed on the first insulating film to fill irregularities on a... Agent: Fujitsu Limited

20140092634 - Mixed control method for resonant converter, resonant converter system and mixed controller: The present application provides a mixed control method for a resonant converter, a resonant converter system and a mixed controller. When the resonant converter operates in a case where a voltage gain is less than a predetermined value, the method includes: setting a mixed control start frequency, a mixed control... Agent: Delta Electronics, Inc.

20140092640 - Power supply device: A PFC (Power Factor Correction) circuit improves the power factor of rectified power. Upon receiving output of the PFC circuit, a first DC-DC converter generates a voltage to be supplied to a load. Upon receiving output of the PFC circuit, a second DC-DC converter and a third DC-DC converter generate... Agent: Fujitsu Telecom Networks Limited

20140092641 - Synchronous rectifying buck-boost converter: A synchronous rectifying buck-boost converter includes a controller, first and second transistors, an inductor and a capacitor. The controller is connected to the gates of the first and second transistors for controlling ON/OFF of the first and second transistors, and further controls the current of the inductor and charge/discharge of... Agent: Inno-tech Co., Ltd.

20140092642 - Direct-current power supply device: The present invention includes: a converter configured to convert the direct-current voltage of the rectifier to another direct-current voltage and supply to a load; a peak hold unit configured to hold a peak value of a current detected by a current detecting unit configured to detect a current flowing in... Agent: Sanken Electric Co., Ltd.

20140092643 - Electronic converter, and related lighting system and method of operating an electronic converter: An electronic converter may include transformer with a primary winding and a secondary winding, wherein the primary winding is coupled to an input for receiving a power signal, and wherein the secondary winding is coupled to an output including a positive terminal and a negative terminal for providing a power... Agent: Osram Gmbh

20140092644 - Switching power supply device and method for circuit design of the switching power supply device: A switching power supply device includes a rectifying circuit configured to rectify an AC voltage and to output a rectified voltage, a smoothing capacitor configured to smooth the rectified voltage and to output a smoothed voltage, a first DC-DC converter configured to convert the smoothed voltage into an intermediate voltage... Agent: Yokogawa Electric Corporation

20140092645 - Control circuit and terminal for cable compensation and wake-up of primary-side regulated power converter: A control circuit of a power converter is provided. It comprises a signal generation circuit generating an oscillation signal in accordance with an output load. A PWM circuit generates a switching signal according to a voltage-loop signal, a current-loop signal and the oscillation signal for regulating an output of the... Agent: System General Corp.

20140092646 - Soft switching synchronous quasi resonant converter: A switching circuit including a transformer having a primary and a secondary side; a first MOSFET switch coupled with the primary side; a primary current sensing device; a second MOSFET switch coupled with the secondary side; a secondary current sensing device; and a control circuit for driving the first and... Agent:

20140092647 - Flyback converter and method for controlling a flyback converter: A flyback converter includes a transformer and a controller operable for controlling a switch coupled in series with a primary winding of the transformer. The controller is configured to operate in multiple modes including a burst mode and a standby mode. In the burst mode, the controller generates a first... Agent: O2micro Inc.

20140092648 - Switch-mode power supply control apparatus and flyback switch-mode power supply including the control apparatus: The present invention discloses a switch-mode power supply control apparatus comprising a PWM controller for outputting a driving signal and a short-circuit protection module coupled to a detection terminal. The detection terminal receives a zero-crossing detection voltage. If the time that the detection voltage input to the detection terminal is... Agent: Hangzhou Silan Microelectronics Co., Ltd.

20140092649 - Contactless inductively coupled power transfer system: A contactless inductively coupled power transfer system includes a power supply device and a power receiving device. The power supply device includes a primary winding for generating an electromagnetic field (EMF) in response to an AC current flow having an operating frequency. The power receiving device includes a resonant circuit... Agent: Powerwow Technology Inc.

20140092650 - Power transmission systems: An offshore wind farm includes a plurality of wind turbines connected to an onshore converter station by means of a distributed power transmission system. The power transmission system includes a series of offshore converter platforms distributed within the wind farm. Each converter platform includes a busbar carrying an ac voltage... Agent: Ge Energy Power Conversion Technology Ltd

20140092651 - Micro-inverter with improved control:

20140092652 - Power supply device and method of determining abnormality in power supply device: A power supply device includes: a first switching element and a flywheel semiconductor element which are connected in series to a first DC power source in this order; and a reactor and a second DC power source which are connected in series in this order to a node between the... Agent:

20140092653 - Electronic circuit operating based on isolated switching power source: In an electronic circuit, a first circuit region is electrically connected to an input circuit region of an isolated switching power source, and a second circuit region is electrically connected to an output circuit region thereof. A driver of an IC is located in the second circuit region and drives... Agent: Denso Corporation

20140092654 - Method for the operation of an inverter, and inverter: The invention relates to a method for operating an inverter (1), in particular a pulse-controlled inverter, comprising multiple phase systems (2, 3, 4), each of which has an outer conductor (7, 8, 9) and at least one semiconductor component (12, 13), and a temperature monitoring device (15) that has multiple... Agent: Robert Bosch Gmbh

20140092655 - Power converter: A power converter includes an inverter unit that includes a plurality of semiconductor switching elements constituting upper and lower arms and converts DC power into AC power; a gate driving unit that outputs, to the inverter unit, a gate signal used to drive gates of the plurality of semiconductor switching... Agent: Hitachi Automotive Systems, Ltd.

20140092656 - Power supply circuit: The power supply circuit (power supply circuit 3) supplying power to a load driving circuit (motor driving circuit 2) that drives a load by controlling a high-side MOS transistor M1 on the basis of an input load control signal includes a booster circuit (charge pump 23) configured to boost a... Agent: Asahi Kasei Microdevices Corporation

20140092657 - Operation control apparatus for solar power system: An operation control apparatus includes a criterion calculator that obtains an operation criterion for the power converter, based on the voltage detected by the above voltage detector on the side of the alternating-current power system, a direct-current voltage detector that detects a direct-current output voltage of the solar battery, and... Agent:

20140092658 - Power conversion apparatus: A power conversion apparatus includes a power converter and a PWM controller. A first switching element is coupled to a positive pole of a DC power source and one terminal of a load. A second switching element is coupled to a negative pole of the DC power source and another... Agent: Kabushiki Kaisha Yaskawa Denki

20140092659 - Wireless power transmission device: A wireless power transmission device includes a power transmitter, a first transmission unit, a power receiver, a feedback regulator, a receive controller, and a second transmission unit. The power transmitter is for generating power, and the first transmission unit is for wirelessly transmitting power generated by the power transmitter. The... Agent: Au Optronics Corp.

20140092660 - Multilevel converter system: A power converter includes at least one leg with a first string including a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, wherein the first string is operatively coupled across a first bus and a second bus. The at least one leg also includes... Agent:

20140092661 - Multilevel converter system: A power converter is presented. The power converter includes at least one leg, the at least one leg includes a first string, where the first string includes a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, and where the first string is operatively coupled... Agent: General Electric Company

20140092662 - Dc to ac conversion circuit: A DC to AC conversion circuit including an inverter, a first inductor, a first capacitor, a second inductor and a second capacitor is provided. The inverter has two input contact points and two output contact points. The input contact points receive a DC signal, and the output contact points output... Agent: Industrial Technology Research Institute

20140092663 - Electric power converter: An electric power converter includes a stacked body in which a plurality of semiconductor modules and a plurality of coolers are stacked. Each of the semiconductor modules is provided with a main body that has semiconductor elements therein, a plurality of power terminals, and control terminals. Among the plurality of... Agent: Denso Corporation

03/27/2014 > 22 patent applications in 20 patent subcategories.

20140085935 - Power conversion device: A power conversion device that includes first and second power conversion units; and a DC link unit positioned between the first and second power conversion units. In the power conversion device, the DC link unit includes a main capacitor and a dummy capacitor, which are selectively used. Accordingly, it is... Agent: Samsung Sdi Co., Ltd.,

20140085936 - Variable frequency converter and adjusting method for the same: A variable frequency converter and an adjusting method for the same are provided in the present application. The variable frequency converter operates in a variable frequency mode, and comprises a power stage circuit module and a variable frequency signal stage circuit module which are connected to form a closed-loop circuit... Agent: Delta Electronics (shanghai) Co., Ltd.

20140085937 - Dc-dc converter and method of driving the same: A DC-DC converter includes a power conversion circuit for converting a DC input voltage to a DC output voltage; and an active clamp circuit for soft switching a first active switching element of the power conversion circuit and recovering leakage inductance energy of a main transformer of the power conversion... Agent: Industrial Technology Research Institute

20140085938 - Primary feedback switching power converter controller with intelligent determination of and response to output voltage drops due to dynamic load conditions: The embodiments herein include a primary-side controller for a switching power converter that is capable of receiving a detection signal from a secondary-side detection circuit indicating that an output voltage has reached a condition. The controller determines the appropriate action once a detection signal has been received by distinguishing whether... Agent: Iwatt Inc.

20140085939 - High efficiency power converter: A power converter nearly losslessly delivers energy and recovers energy from capacitors associated with controlled rectifiers in a secondary winding circuit, each controlled rectifier having a parallel uncontrolled rectifier. First and second primary switches in series with first and second primary windings, respectively, are turned on for a fixed duty... Agent: Synqor, Inc.

20140085941 - Ac-dc power supply input voltage detection and monitoring: A power converter includes a transformer with a primary and a secondary winding and a switch. A controller of the power converter at the primary winding side of the transformer generates a control signal to turn on or turn off the switch, the switch being turned on responsive to the... Agent: Iwatt Inc.

20140085940 - Power system switch protection using output driver regulation: A controller of a switching power converter includes a voltage protection circuit that generates a modified supply voltage that does not exceed a predetermined threshold voltage to power one or more components of the controller.... Agent: Iwatt Inc.

20140085942 - Shunt regulator having protection function and power supply device having the same: There are provided a shunt regulator having a protection function to detect an abnormal state, and a power supply device having the same. The shunt regulator of a power supply device in which a primary side and a secondary side have grounds having different electrical characteristics and are electrically insulated... Agent: Samsung Electro-mechanics Co., Ltd.

20140085943 - Controller with quasi-resonant mode and continuous conduction mode and operating method thereof: The present invention relates to a controller with quasi-resonant mode and continuous conduction mode and an operating method thereof. The controller comprises: a transformer, a switching unit, a load-detecting unit and a controlling unit, and the transformer has a first winding and a secondary winding. The secondary winding connects to... Agent: Phihong Technology Co., Ltd.

20140085944 - Dc-ac power converting apparatus and solar power supplying apparatus including the same: There are provided a DC-AC power converting apparatus including no capacitor or a small capacity capacitor for removing a ripple in an input terminal thereof by charging or discharging power according to a difference between output power and instantaneous system power of a photovoltaic cell, and a solar power supplying... Agent: Samsung Electro-mechanics Co., Ltd.

20140085945 - Power supply system, associated current ripple suppression circuit and method: A power supply system has a current source configured to provide an output current, a load supplied by the current source, and a current ripple suppression circuit. The current ripple suppression circuit has a first end and a second end, wherein the first end of the current ripple suppression circuit... Agent: Chengdu Monolithic Power Systems Co., Ltd.

20140085946 - Power system and starting method thereof: A power system and a starting method thereof includes a power output circuit, a loop circuit, a soft start circuit, and a constant-current source that supplies power to the soft start circuit. The loop circuit includes a loop circuit capacitor. The power system further includes a precharge circuit that charges... Agent: Shenzhen China Star Optoelectronics Technology Co., Ltd

20140085947 - Off-line power converter and integrated circuit suitable for use in same: An off-line power converter includes an integrated circuit power factor controller including a multi-function input terminal, a drive terminal for providing a drive signal to a gate of a drive transistor, a processing circuit coupled to the multi-function input terminal and, based on a signal received from the multi-function input... Agent:

20140085948 - Active bridge back powering protection and powered device interface with active bridge control: A method is disclosed to at least partially prevent back powering of power sourcing equipment. In one or more implementations, the method includes detecting a magnitude of current through a current sensor, such as a transistor and/or a resistor. The active FET bridge is configured to rectify input power supplied... Agent: Maxim Integrated Products, Inc.

20140085949 - Switching power supply: A switching power supply that conducts switching of an input voltage by a switching element to obtain a specified output voltage includes: an ON width controlling component that controls an ON width of the switching element; a zero current detecting component that detects zero current through the switching element to... Agent: Fuji Electric Co., Ltd.

20140085950 - Power conversion device: 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 and a plurality of second switching elements 312, 314 and 316, both of which are connected to each phase R, S... Agent: Nissan Motor Co., Ltd

20140085951 - Receiving circuit and signal receiving method: Provided is a receiving circuit that operates in a power supply system different from a transmitting circuit outputting a transmission signal and receives the transmission signal through an AC coupling device where a primary coil through which the transmission signal flows and a secondary coil having a center tap to... Agent: Renesas Electronics Corporation

20140085952 - Synchronous rectifier controller, power converter using same, and method therefor: In one form, a synchronous rectifier controller includes a drive clamp adjust terminal, a drive terminal, a clamp voltage generator circuit coupled to the drive clamp adjust terminal for measuring a signal at the drive clamp adjust terminal and providing a clamp voltage having a value determined by the signal,... Agent:

20140085953 - Power conversion system: A power conversion system includes a filter unit, a DC/DC converter, a DC link, an inverter, a control unit, and a traction motor. The DC/DC converter is used for boosting DC voltage of a DC source and electrically coupled to the DC source through the filter unit. The DC/DC converter... Agent: General Electric Company

20140085955 - Power conversion apparatus: The power conversion apparatus includes an inverter circuit which converts a DC current into an AC current and have a U-phase, V-phase, and w-phase power semiconductor modules, and a capacitor module for smoothing the DC current. Each of the power semiconductor modules is configured separately and connected to a first... Agent: Hitachi Automotive Systems, Ltd.

20140085954 - Semiconductor power conversion device: A semiconductor power conversion device includes n (where n is a natural number) mutually isolated inverse conversion devices that output three-level voltage; and an inverse conversion device, isolated from the inverse conversion devices, that employs as input DC voltage a voltage VDCS of one half or one third of the... Agent: Kabushiki Kaisha Toshiba

20140085956 - Power conversion device: A power conversion apparatus is 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 polyphase ac power,... Agent: Nissan Motor Co., Ltd.

03/20/2014 > 24 patent applications in 21 patent subcategories.

20140078780 - Digital controller for a power converter: Provided are methods and circuits for a controller for a control system, comprising first and second control loops that operate substantially independently, wherein the first control loop is an amplitude control loop and the second loop is a phase or frequency control loop. In some embodiments the amplitude control loop... Agent: Sparq Systems Inc.

20140078781 - Power supply circuit and power supply apparatus: A power supply circuit includes: a depression mode transistor that includes a field plate; an enhancement mode transistor to which a source electrode and a drain electrode of the depression mode transistor are coupled; and a constant current source that is coupled to a connection node between the depression mode... Agent: Fujitsu Limited

20140078783 - Full-bridge quasi resonant dc-dc converter and driving method thereof: A full-bridge quasi-resonant DC-DC converter is provided, including a transformer having a primary winding and a secondary winding, a full-bridge converting circuit electrically connected with the primary winding of the transformer, a resonant capacitor provided between the full-bridge converting circuit and the primary winding, a rectifier circuit electrically connected with... Agent: Industrial Technology Research Institute

20140078782 - Power converter control system and method: A power converter control system includes primary bridge controller that is configured to actuate a first plurality of gate drive units that switch a first plurality of power elements in a primary bridge of a power converter. The control system further includes a secondary bridge controller separate from the primary... Agent:

20140078785 - Adapter power supply: An adapter power supply of the invention comprises a switching element that performs switching of an input voltage obtained by rectifying an input AC voltage to deliver switched voltage to a primary winding of an isolating transformer, a diode that rectifies a voltage obtained across a secondary winding of the... Agent: Fuji Electric Co., Ltd.

20140078786 - Power supply circuit: This power supply circuit includes a comparison portion configured to compare the value of a voltage based on a voltage input to a primary winding of a transformer with the value of a voltage based on the full-wave rectified voltage of an alternating current source, a load circuit supplied with... Agent: Funai Electric Co., Ltd.

20140078784 - Switching power supply: A switching power supply can reduce conduction noise when frequency spread control is conducted simultaneously with switching frequency reducing control. The switching power supply comprises a frequency controller that controls the switching frequency of the switching element corresponding to a load condition and reduces the switching frequency in a light... Agent: Fuji Electric Co., Ltd.

20140078787 - Switching power source device: A switching power source device IS capable of guaranteeing a normal switching operation even when the input of a coil voltage used for adjusting a dead time is eliminated. The switching power source device includes a dead time adjustment circuit that generates an ON trigger signal that regulates an ON... Agent: Fuji Electric Co., Ltd.

20140078788 - Synchronous rectifying control method and circuit for isolated switching power supply: Disclosed are synchronous rectifying control methods and circuits for an isolated switching power supply. In one embodiment, a method can include: (i) generating a ramp voltage based on a power terminal voltage, where the power terminal voltage includes a voltage between first and second power terminals of a synchronous rectifier... Agent: Silergy Semiconductor Technology (hangzhou) Ltd

20140078789 - Switching power converter with secondary-side dynamic load detection and primary-side feedback and control: A power converter includes a transformer with a primary and a secondary winding. Feedback and control is maintained on the primary-side while a separate load detection circuit detects dynamic load conditions on the secondary-side. The load detection circuit detects dynamic load conditions at the time when a load is connected... Agent: Iwatt Inc.

20140078790 - Systems and methods for voltage control and current control of power conversion systems with multiple operation modes: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal... Agent: On-bright Electronics (shanghai) Co., Ltd.

20140078791 - Systems and methods for controlling an inverter: An inverter apparatus for a photovoltaic panel includes a primary microcontroller configured to send a conversion signal to a DC to AC conversion unit. The inverter further includes a first isolator and a secondary microcontroller communicatively coupled to the primary microcontroller through the first isolator. The secondary microcontroller is configured... Agent:

20140078792 - Power supply device control circuit: In some aspects of the invention, overcurrent protection is carried out by suppressing fluctuations in current flowing through a switching element after overcurrent detection. A peak current reaching time detection circuit detects a peak current reaching time needed until current flowing through a switching element reaches a peak value. A... Agent: Fuji Electric Co., Ltd.

20140078793 - Mitigation of arc flash hazard in photovoltaic power plants: Arc flash mitigation devices are employed to protect personnel during maintenance of photovoltaic inverters. During normal operation, an alternating current (AC) output of a photovoltaic inverter is coupled to a low voltage winding of a step up transformer through a bus-bar (e.g., an electrically conductive interconnect), which has higher current... Agent:

20140078794 - Switching power source device: A switching power source device includes a switching power supply main body switching an input voltage via a switching element to obtain a predetermined DC output voltage, a control circuit performing on/off-driving of the switching element; and a capacitor connected to the control circuit to be charged by an external... Agent: Fuji Electric Co., Ltd.

20140078795 - Charge pump supply with clock phase interpolation: A voltage generator may include a plurality of charge pumps, plural sets of delay pipelines and a phase controller. Given M delay pipelines having N stages each, there may be M*N charge pumps each having a triggering input coupled to a respective stage or a respective pipeline. The phase controller... Agent: Analog Devices, Inc.

20140078796 - Power conversion apparatus and control method thereof: In the present invention, provided is a power conversion apparatus in which at least one energy storage element and at least one switching element are included, a plurality of series circuits of a transformer winding and an arm in which one or a plurality of at least two-terminal unit converters... Agent: Hitachi, Ltd.

20140078797 - Control for fault-bypass of cascaded multi-level inverter: A cascaded multi-level inverter is controlled in fault bypass operation. Rather than relying on approximations or feedback forms, the reference voltages are generated as an analytic solution. The analytic solution and its implementation are not affected by the output frequency of the inverter and it is able to provide maximum... Agent: Siemens Corporation

20140078798 - Power factor controller and method: In accordance with an embodiment, a converter includes a power factor controller that varies the switching frequency of a switching transistor in accordance with a signal representative of power at the input of the converter.... Agent: Semiconductor Components Industries, LLC

20140078799 - Inverter modulator with variable switching frequency responsive to a sensed parameter: An inverter control is used to control the output of a distributed power generating station, such as a photovoltaic (PV) solar power station, connected to a power grid. The power station is connected to an inverter output. Pulse width modulation is used to shape the output in order to maximize... Agent:

20140078800 - Current balance control in converter for doubly fed induction generator wind turbine system: Systems and methods for reducing current imbalance between parallel bridge circuits used in a power converter of a doubly fed induction generator (DFIG) system are provided. A control system can monitor the bridge current of each of the bridge circuits coupled in parallel and generate a feedback signal indicative of... Agent: General Electric Company

20140078801 - Advanced dc voltage adjustment using switched capacitors: A voltage booster system for use, for example, in an electric vehicle places a switched capacitor voltage converter between a high voltage battery and the vehicle's electrical load, typically a traction power inverter for driving the vehicle's electric motor. The battery input to the converter is pulsed to couple a... Agent: Chrysler Group LLC

20140078802 - Dc/ac inverter to convert dc current/voltage to ac current/voltage: A DC/AC inverter is disclosed having two DC input terminals (1, 2), between which are connected an energy buffer capacitor (C), two output voltage terminals (3, 4) connected to filter section, switch configuration comprising the active switches (S1-S6), and freewheeling diodes (D1-D6) between the output voltage terminals (3, 4) and... Agent:

20140078803 - Electric power converter: An electric power converter is provided with: a power semiconductor module, which has a power semiconductor element that converts a direct current into an alternating current; a capacitor module, which has a capacitor element that smooths the direct current; and a cooling body, which cools the power semiconductor module and... Agent: Hitachi Automotive Systems, Ltd.

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