|Electric power conversion systems patents - Monitor Patents|
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Electric power conversion systemsBelow 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. 03/06/2014 > 30 patent applications in 22 patent subcategories.
20140063857 - Method and apparatus for controlling a lighting device: Aspects of the disclosure provide a method. The method includes determining a power adjustment to a load, determining whether a switching frequency of a pulse width modulation (PWM) signal is within a specific range, and adjusting the switching frequency of the PWM signal based on the power adjustment to control... Agent:
20140063858 - Supply voltage control: A disconnect device for a switched-mode power supply, including an activation device for a first transistor for generating a transformable voltage. The device includes a second transistor of the PNP type and a third transistor of the NPN type, the base of the second transistor being connected to the collector... Agent:
20140063856 - Volatge converting apparatus and sub-harmonic detector thereof: A voltage converting apparatus and a sub-harmonic detector are disclosed. The sub-harmonic detector includes a pulse eliminating circuit, a counter, and a comparator. The pulse eliminating circuit receives a pulse width modulation (PWM) signal and a reference PWM signal having a same period. The PWM signal and reference PWM signal... Agent: Excelliance Mos Corporation
20140063860 - Dc power source device and power conversion method: FETs disposed in a DC/DC converter are each driven by a drive transformer. A voltage from a single drive power supply disposed in common for the FETs is divided into positive and negative biases to be applied to the FETs, and an operational state of the FETs is detected based... Agent: Mitsubishi Electric Corporation
20140063859 - Power supply device: A power supply device is provided. The power supply device includes: a transformer configured to include first and second windings; a half bridge circuit configured to be connected to first and second nodes and both ends of the first wiring; and a full bridge circuit configured to be connected to... Agent: Lg Innotek Co., Ltd.
20140063861 - Ac-dc voltage converter with low standby power consumption and control method thereof: Disclosed are AC-DC voltage converter circuits and methods for low standby power consumption. In one embodiment, a method can include: (i) detecting operating states of an input power supply, where the input power supply is received by a safety capacitor and provided to a switching power supply circuit after being... Agent: Silergy Semiconductor Technology (hangzhou) Ltd
20140063862 - Varying switching frequency and period of a power supply controller: A controller includes a PWM circuit and a timing circuit. The PWM circuit controls a switch in response to a clock signal. A switching period of the clock signal is based on a charging and discharging time of a capacitor included in the timing circuit. Both first and second current... Agent: Power Integrations, Inc.
20140063863 - Energy transfer assembly with tuned leakage inductance and common mode noise compensation: An energy transfer assembly includes first and second windings wound around a bobbin. The first winding has a first number of layers proximate to a first end and a second number of layers proximate to a second end of the bobbin. The second winding has a third number of layers... Agent: Power Integrations, Inc.
20140063864 - Electronic device: An electronic device includes a magnetic element, a first circuit module and a second circuit module. The magnetic component includes a magnetic core set and a winding, and the winding includes a first winding and a second winding, and the winding is assembled on the magnetic core set. The first... Agent: Delta Electronics, Inc.
20140063865 - Dc/dc converter: A pulse modulator generates a pulse modulation signal SPM having a duty ratio which is adjusted according to a feedback voltage Vfb that corresponds to the output voltage VOUT of a DC/DC converter. A second oscillator generates a second cyclic signal which is asserted with each of a predetermined second... Agent: Rohm Co., Ltd.
20140063866 - Method and apparatus for a control circuit responsive to an impedance coupled to a control circuit terminal: A controller includes a current sense circuit and a voltage regulation circuit. The current sense circuit generates a first signal that indicates whether a current through a sense terminal exceeds a first threshold current level, which indicates a fault condition of a power converter. The voltage regulation circuit regulates the... Agent: Power Integrations, Inc.
20140063867 - Apparatus and method for sensing of isolated output: A switched-mode power supply includes an energy transfer element coupled between a primary side and a secondary side. A first main terminal of a switch is coupled to the energy transfer element and a second main terminal of the switch is coupled to an input of the primary side. A... Agent: Power Integrations, Inc.
20140063868 - Power supply apparatus with power factor correction and pulse width modulation mechanism and method thereof: A power supply apparatus that includes a pulse width modulation (PWM) based power conversion unit and a power factor correction (PFC) conversion unit is provided. The PWM-based power conversion unit is configured to receive a direct current (DC) input voltage and perform pulse width modulation on the received DC input... Agent: Fsp Technology Inc.
20140063870 - Apparatus and methods for restoring power cell functionality in multi-cell power supplies: A method is provided for operating a multi-cell power supply that includes multiple series-connected power cells in each of multiple legs. Each power cell includes a bypass device that may be used to selectively bypass and de-bypass the power cell. After a first power cell faults and is bypassed as... Agent: Siemens Industry, Inc.
20140063869 - Methods of balancing reactive power in multi-level motor drives with active front ends: A method of balancing reactive power at a power delivery system is disclosed. The method may include operating a power delivery system that may have a plurality of power cells that are electrically connected to a first transformer comprising one or more primary windings and a plurality of secondary windings... Agent: Siemens Industry, Inc.
20140063871 - Power delivery systems and methods for offshore applications: A system for delivering power to an offshore load is disclosed. The system may include an on-land source of three-phase power, an on-land AC-to-DC power conversion module, a DC transmission line, and an offshore DC-to-AC power inverter. The on-land AC-to-DC power conversion module may be configured to convert the three-phase... Agent: Siemens Industry, Inc.
20140063872 - Digital emi filter: The invention provides a digital active EMI filter that removes, minimizes, or reduces unwanted interference (i.e., EMI noise) generated by a power circuit such as, for example, a power converter. Digital active filtering includes digital sampling of the incident noise signal amplitude and frequency, discrete time conversion of the EMI... Agent: Sparq Systems Inc.
20140063874 - High-frequency-link power-conversion system having direct double-frequency ripple current control and method of use: A direct double-frequency ripple current control in a two-stage high-frequency-link (HFL) based fuel cell converter that can achieve low-frequency ripple free input current without using large electrolytic capacitors is provided. To eliminate the double-frequency ripple current disturbance introduced by the single-phase inverter load, a proportional-resonant (PR) controller is developed to... Agent: The Florida State University Research Foundation, Inc
20140063873 - Method and apparatus for inverter output current harmonic reduction: Method and apparatus for reducing harmonic distortion. In one embodiment, the method comprises determining an inverter output current waveform; determining a plurality of harmonic components of the inverter output current waveform; determining, based on the plurality of harmonic components, a plurality of harmonic compensation components; and generating a compensating current... Agent: Enphase Energy, Inc.
20140063875 - Start-up circuit and method for ac-dc converters: An AC-DC power converter includes a rectifying unit for generating a rectified voltage, an output stage for converting the rectified voltage into a DC voltage for a load, a controller for controlling the output stage, and a start-up circuit. The start-up circuit includes a first power section coupled to the... Agent: Taiwan Semiconductor Manufacturing Company, Ltd.
20140063876 - Apparatus and methods for input protection for power converters: Systems and methods in accordance with this invention provide a power converter including an input signal terminal, a first output signal at a first output signal terminal, and a controller. The controller is adapted to switch the first output signal from a first value to a second value, measure a... Agent: Siemens Industry, Inc.
20140063877 - Power conversion apparatus: A power conversion apparatus according to the present invention includes a plurality of PWM converters (2 and 3) that are connected in parallel and convert power supplied from a common three-phase AC power supply (1) into DC power and, and supply the DC power to a common load (6) and... Agent: Mitsubishi Electric Corporation
20140063878 - Parallel power supply and power detection method for parallel power supply: A parallel power supply includes a built-in test switch and a control and determination unit. The built-in test switch is arranged to generate a first detection signal. The control and determination unit is coupled to the built-in test switch. When receiving the first detection signal, the control and determination unit... Agent: 3y Power Technology (taiwan), Inc.
20140063879 - Rectifier circuit and electronic device using same: A rectifier circuit includes a three-phase alternating current (AC) voltage, a first rectifier unit, a second rectifier unit, a third rectifier unit, a first voltage output terminal, a second voltage output terminal, a first energy storing circuit and a second energy storing circuit. The three-phase AC voltage generates a first... Agent: Hon Hai Precision Industry Co., Ltd.
20140063880 - Rectifier circuit and electronic device using same: A rectifier circuit includes a first alternating current (AC) voltage input terminal, a second AC voltage input terminal, a signal generating circuit, a first energy generating circuit, a second energy generating circuit, a third energy generating circuit, a first output terminal, and a second output terminal The first and second... Agent: Hon Hai Precision Industry Co., Ltd.
20140063881 - Inverter and driving method thereof: An inverter according to an embodiment of the present disclosure may include a converter having a switch, configured to convert a DC voltage into a half-wave rectified sine waveform voltage; a switching device unit having a switch, configured to convert the half-wave rectified sine waveform voltage into a sine waveform... Agent: Lsis Co., Ltd.
20140063882 - Circuit arrangement with two transistor devices: A circuit arrangement includes a first transistor device and a second transistor device. Each transistor device includes a first load terminal, a second load terminal, a gate terminal, and a control terminal. The first load terminals are electrically connected, and the control terminals are electrically connected. A capacitive storage element... Agent: Infineon Technologies Austria Ag
20140063883 - System for optimizing switching dead-time and method of making same: A system for optimizing switching dead-time includes a power converter that includes a half-bridge circuit comprising a first switch coupled in series with a second switch, first and second state detection circuits respectively coupled to the first and second switches and configured to respectively detect an activation state of the... Agent:
20140063884 - Inverter device: In an inverter device, a first three-level circuit includes first to fourth preceding-stage switch elements connected in series between a first input end and a ground and a first charging and discharging capacitor. A second three-level circuit includes fifth to eighth preceding-stage switch elements connected in series between a second... Agent: Murata Manufacturing Co., Ltd.
20140063885 - Power-system-interconnected inverter device: In a power-system-interconnected inverter device, PI control circuits obtain voltage correction values in directions reducing the current errors on the basis of current errors serving as differences between target current values and detection values. Multiplexers provide modulation circuits with voltage target values corrected by the voltage correction values being added... Agent: Murata Manufacturing Co., Ltd.02/27/2014 > 16 patent applications in 14 patent subcategories.
20140056032 - High-efficiency high step-up ratio direct currentconverter with interleaved soft-switchingmechanism: A high-efficiency high step-up ratio direct current converter with an interleaved soft-switching mechanism is provided. The direct current converter includes a voltage-multiplier circuit and an active clamping circuit. The voltage-multiplier circuit includes two isolating transformers, two main switches disposed on a primary side of the two isolating transformers, four diodes... Agent: Allis Electric Co., Ltd.
20140056033 - Electronic apparatus and power controlling method thereof: An electronic apparatus and a power controlling method thereof are provided. The electronic apparatus includes a system unit supplied with power to conduct an operation, and a power supply unit including a power control unit controlling output of standby power, and supplying the standby power to the system unit. The... Agent: Samsung Electronics Co., Ltd.
20140056034 - Dc/dc converter, electronic apparatus having the same and dc/dc conversion method thereof: A multi-output DC/DC converter, which may be included in an electronic apparatus, performs sync switching control using a simplified configuration. The DC/DC converter may include a first switching unit which alternately switches input DC power and converts the DC power into AC power, a converter which converts the AC power... Agent: Samsung Electronics Co., Ltd.
20140056035 - Method and arrangement for improved operability of a high temperature fuel cell system: An arrangement for improved operability of a high temperature fuel cell device at higher fuel cell voltage values than nominal voltage values, each fuel cell in the fuel cell device including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, and the... Agent: Convion Oy
20140056036 - Ac-to-dc power converter and control method and control integrated circuit thereof: An AC-to-DC power converter with a BJT as a power switch can set a base current of the BJT by a current setting resistor which is in the outside of a control integrated circuit. Since an output current and a recovery current of the BJT are injected into a sensing... Agent: Richtek Technology Corporation
20140056037 - Control circuit and interleaved power supply including that control circuit: A control circuit that controls an interleaved power supply, and an interleaved power supply including that control circuit, which are unlikely to be affected by a variation among components and are suitable for mass production, are provided. The clock generator generates a clock pulse having a predetermined frequency. The signal... Agent:
20140056038 - Ac conversion circuit: The AC converter converts a single-phase input AC voltage with a frequency f0 into a three-phase output AC voltage with a frequency f1 that is lower than f0. The AC converter includes a switching section 101 with multiple switching elements and a switching control section 103 that controls the conduction... Agent: Panasonic Corporation
20140056039 - Method and apparatus for ac-to-dc power conversion: In one aspect, the present invention reduces electromagnetic interference (EMI) caused by a capacitive dropper power supply by synchronizing the openings and closings of a shunt switched used for regulation control of the DC output voltage generated by the power supply, to zero crossings of AC current from the current-limiting... Agent:
20140056040 - Power supply apparatus for an electrical appliance: A power supply apparatus includes a power supply circuit and a power-on circuit. The power-on circuit detects a remotely transmitted control signal and causes a transition of the power supply circuit to a turned on state. The power-on circuit includes a transducer configured to provide a power-on signal in response... Agent: Stmicroelectronics S.r.l.
20140056041 - Power generation system, power converter system, and methods of operating a power converter system: A power converter system includes a converter configured to be coupled to a power generation unit for receiving power from the power generation unit, and a bus coupled to the converter, wherein a voltage is generated across the bus when electricity is conducted through the power converter system. The power... Agent: General Electric Company
20140056042 - Power layer generation of inverter gate drive signals: Solid state switches of inverters are controlled by timing signals computed in power layer interface circuitry for individual inverters. Multiple inverters may be placed in parallel with common three-phase output. Common control circuitry generates timing signals or data used to reconstruct the common signals and sends these signals to the... Agent: Rockwell Automation Technologies, Inc.
20140056043 - Power generator, and electric equipment using it: A power generator includes a power generating device that generates a power by receiving vibration, and a power converter that converts the output of the power generating device. The power generating device outputs powers through a first system and a second system. The power converter is driven by receiving the... Agent:
20140056044 - Photovoltaic inverter and a control method thereof: A photovoltaic inverter includes an input circuit, a decoupling circuit and an output circuit. The input circuit has a DC input port, an input capacitor, a magnetizing inductor, a first unidirectional element and a first switch. The magnetizing inductor forms first and second connection nodes. The decoupling circuit has a... Agent:
20140056045 - Control circuit for power converter, conversion system and controlling method thereof: The disclosure provides a control circuit for a power converter, a conversion system and a controlling method thereof. The conversion system includes an AC power supply, a power converter and a control circuit. The power converter includes a first and second bridge arms connected in parallel. The first bridge arm... Agent:
20140056047 - High-efficiency bias voltage generating circuit: Disclosed are bias voltage generating circuits and methods for a switching power supply. In one embodiment, a switching power supply can include: (i) a driver circuit configured to receive a bias voltage, and to drive a switch in a power stage of the switching power supply; (ii) where a ratio... Agent: Silergy Semiconductor Technology (hangzhou) Ltd
20140056046 - Passive power factor correction circuit, electronic device applying the same and operation methods thereof: A passive power factor correction circuit includes: a DC capacitor and an input capacitor, coupled to a rectifying circuit and charged by a DC voltage from the rectifying circuit; an output capacitor, coupled to a load; first diode and a second diode, coupled to the input capacitor and the output... Agent: Industrial Technology Research Institute02/20/2014 > 12 patent applications in 8 patent subcategories.
20140049990 - Soft-switching high voltage power converter: In a general aspect, a charge transfer includes a transformer including a plurality of primary windings and a plurality of galvanically isolated secondary windings, a first plurality of resonant converters having input terminals connected in series to an input power terminal and having output terminals connected to different primary windings... Agent:
20140049991 - Power device: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current... Agent: Advanced Charging Technologies, LLC
20140049993 - Power factor correction: A power factor correction circuit includes an inductor L1, a diode D1, a switch Q3 and a controller 24. An input voltage Vin is applied to the inductor L1 which is cyclically discharged through the diode D1 by the operation of the switch Q3. The switch Q3 is controlled by... Agent: Tridonic Gmbh & Co Kg
20140049992 - Switching power supply: A switching power supply is suitable for transforming AC input voltage to DC output voltage. The switching power supply includes a transformer, a power circuit, an output circuit, a switching element, a control element, a shielding element and a metal element. The power circuit is coupled to the primary side... Agent: Asian Power Devices Inc.
20140049994 - Device for synchronous dc-dc conversion and synchronous dc-dc converter: A DC-DC converter transforms a DC input voltage to generate a DC output voltage by complementary switching control of a main switching transistor and a synchronous rectifying transistor. The DC-DC converter includes a soft-start circuit configured to generate a soft-start voltage rising from an initial voltage at start-up of the... Agent: Panasonic Corporation
20140049995 - Diagnostics for multi-level medium voltage drive using mechanical bypass: A system and method for performing diagnostics in a medium voltage drive. The system includes a power cell and a bypass mechanism. The bypass mechanism is operably connected to output terminals of the power cell and configured to create a shunt path between the output terminals. The bypass mechanism includes... Agent: Siemens Industry, Inc.
20140049996 - Hybrid dc-to-ac conversion system and method of operating the same: A hybrid DC-to-AC conversion system includes a first DC input voltage, a second DC input voltage, a power conversion apparatus, and a comparison unit. The power conversion apparatus is connected in parallel to the first DC input voltage and the second DC input voltage to convert the first DC input... Agent: Delta Electronics, Inc.
20140049998 - Dc to ac power converter: A direct current to alternating current converter method and apparatus is disclosed that may comprise a direct current (DC) input source; an alternating current (AC) output inverter circuit, having an input connected across the DC input source; a partial power DC-DC boosting circuit intermediate to the DC input source and... Agent:
20140049999 - Modulation of switching signals in power converters: There is provided a method and control system for reducing noise in a power converter by controlling a switching device in the power converter according to a modulation scheme. The switching device couples a direct current (DC) source to provide an alternating current (AC) output at a particular switching frequency.... Agent: Control Techniques Limited
20140049997 - Transformerless multiple output capable power supply system: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current... Agent: Advanced Charging Technologies, LLC
20140050000 - Dc-link voltage balancing control for multilevel inverters: A method for balancing a voltage of an inverter determines an expected voltage of a capacitor based on a voltage of the capacitor at a start of a switching cycle and determines a duty cycle minimizing a value of an objective function representing a difference between the expected voltage of... Agent:
20140050001 - Reactor, composite material, reactor core, converter, and power conversion device: A reactor 1A includes a single coil 2 formed by spirally winding a wire 2w and a magnetic core 3 that is disposed inside and outside the coil 2 and forms a closed magnetic circuit. The magnetic core 3 includes an inner core portion 31 disposed inside the coil 2... Agent: Sumitomo Electric Industries, Ltd.02/13/2014 > 23 patent applications in 17 patent subcategories.
20140043860 - Controlling an adapter transformer voltage: Embodiments of an adapter are disclosed that include a transformer with a primary coil coupled to an H-bridge. The H-bridge is controlled by a control circuit that controls a voltage across the primary coil using the H-bridge, and the control circuit is configured to control the H-bridge so that during... Agent: Apple Inc.
20140043861 - Controlling an adapter transformer voltage: An adapter for electrical power that includes a rectifier coupled to a transformer with a primary coil and a secondary coil. The secondary coil includes a first end tap, a second end tap, and a center tap. A first switch is coupled between the first end tap and a primary... Agent: Apple Inc.
20140043863 - Novel control method to reduce switching loss on mosfet: A method of controlling a switching mode power converter enables zero voltage switching by forcing a voltage across the main switch to zero. This is accomplished by sensing when a current on the secondary side of the power converter drops to zero, or other threshold value, and then generating a... Agent: Flextronics Ap, LLC
20140043862 - Power adapter: Embodiments of an adapter are disclosed that include a rectifier with an input and an output coupled to a step-down transformer with a primary coil and a secondary coil, wherein the primary coil is coupled to the output of the rectifier. A step-up converter is coupled to the secondary coil.... Agent: Apple Inc.
20140043864 - Power supply circuit using dc/dc converter: A power supply circuit comprises an input for receiving a power supply from a battery and a DC/DC converter for supplying a converted voltage to a load. A regulator is used for controlling the DC/DC converter such that the current drawn from the converter is smoothed. A charge storage device... Agent: Nxp B.v.
20140043865 - Synchronous rectifier control techniques for a resonant converter: A resonant converter system includes a first stage having inverter circuitry and resonant tank circuitry configured to generate an AC signal from a DC input signal, a transformer configured to transform the AC signal, and a second stage. The second stage features synchronous rectifier (SR) circuitry including a plurality of... Agent: Fairchild Semiconductor Corporation
20140043866 - High efficiency and low loss ac-dc power supply circuit and control method: Disclosed herein are high efficiency, low loss AC-DC power supply circuits, and associated control methods. In one embodiment, an AC-DC power supply circuit can include: (i) a rectifier configured to rectify an AC power supply to generate a DC input voltage; (ii) a first stage voltage converter configured to convert... Agent:
20140043867 - Switching power supply device control circuit and switching power supply: A switching power supply device control circuit and switching power supply can combat fluctuation due to the input voltage in the peak current of a switching element, even when using an oscillator. A control IC is connected to a switching element and to a current detecting resistor, and controls the... Agent: Fuji Electric Co., Ltd.
20140043869 - Power supply apparatus and image forming apparatus: The power supply apparatus includes a switch element for turning ON and OFF supply of electric power to a primary winding of a transformer; a determining unit connected to an auxiliary winding of the transformer, for determining an ON-time of the switch element; and a switching unit for switching the... Agent: Canon Kabushiki Kaisha
20140043868 - Switching power supply system and control circuit of the switching power supply system: A switching power supply system includes a transformer having a primary winding, a secondary winding and a tertiary winding, a switching device inputted to the primary winding carrying out switching operation on the basis of a first control signal or a second control signal, an output voltage producing section rectifying... Agent: Fuji Electric Co., Ltd.
20140043870 - Three phase boost converter to achieve unity power factor and low input current harmonics for use with ac to dc rectifiers: A voltage source inverter comprises a zigzag transformer providing a neutral point. A rectifier unit comprises three single phase boost converters each connected to one of the three phases of AC power and the neutral point and comprising a bridge rectifier converting single phase AC power to DC power and... Agent: Yaskawa America, Inc.
20140043871 - Emi filter using active damping with frequency dependant impedance: A circuit for providing damping in an electromagnetic interference (EMI) filter with an inductor-capacitor (LC) circuit, includes at least one capacitor connected to receive a common-mode current from the LC circuit; a current sensor that senses the common-mode current; a linear amplifier that amplifies the sensed common-mode current; and a... Agent: Hamilton Sundstrand Corporation
20140043872 - Control device for a switching device with separate start-up and holding coils: A control device for a switching device with separate start-up and holding coils includes control electronics to control the current supply to the start-up and holding coils and a direct voltage supply unit for the holding coil and the control electronics with the same reference potential for the holding coil... Agent:
20140043873 - Method in a voltage source chain-link converter, computer programs and computer program products: A method in a voltage source chain-link converter. The method includes: detecting a failure of a device of one converter cell module; blocking a phase-leg including the failed position; discharging to zero a capacitor unit of the converter cell module including the failed position; and providing a current path for... Agent:
20140043874 - Circuit for controlling a latch mode of a pulse width modulation circuit and method thereof: A circuit for controlling a latch mode of a pulse width modulation circuit includes a D flip-flop, a voltage generation unit, a comparator, and a logic unit. The D flip-flop generates a switch control signal according to a latch enable signal. The voltage generation unit generates a discharge current, and... Agent: Leadtrend Technology Corp.
20140043875 - Off-line regulator and associated method: The present invention discloses an off-line regulator. The off-line regulator comprises a rectification circuit configured to rectify an AC line voltage into a rectified line voltage; a pass device coupled between the rectified line voltage and a first capacitor, the pass device is configured to be turned ON or OFF... Agent: Monolithic Power Systems, Inc.
20140043876 - Active feedback control integrated circuit applied to an alternating current/direct current converter and operation method thereof: An active feedback control integrated circuit applied to an alternating current/direct current converter includes a feedback pin, an operation unit, a control unit, and a controlled-current generation unit. The feedback pin is used for receiving a feedback current of an output feedback unit of the alternating current/direct current converter. The... Agent: Leadtrend Technology Corp.
20140043877 - Power factor correction converter: A power factor correction converter includes: a light load detection circuit configured to generate, if supplied power to a load is less than or equal to a predetermined value, a light load detection signal whose level corresponds to the supplied power; a target waveform generation circuit configured to generate, based... Agent: Panasonic Corporation
20140043878 - High-efficiency, low-power power supply circuit: A power supply circuit includes a rectifier, a charging circuit, and a storage capacitor. An AC signal is rectified by the rectifier thereby generating a rectified signal VR between a VR node and a GND node. The capacitor is coupled between an output voltage VO node and the GND node.... Agent: Ixys Corporation
20140043879 - Switch control device, power supply device comprising the same, and driving method of power supply device: The present invention relates to a switch controller, a power supply including the same, and a method for driving the same. An AC input of the power supply is connected to a rectification circuit. The power supply includes a power switch to which an input current passed through the rectification... Agent: Fairchild Korea Semiconductor Ltd.
20140043880 - Method and apparatus for determining a fault current portion in a differential current: When determining a fault current portion IF in a differential current idiff(t) measured by an inverter, an AC voltage uAC(t) applied to an AC output of the inverter is measured and a periodic reference function y(t) of alternating sign is generated as a function of the measured AC voltage uAC(t)... Agent:
20140043881 - Power converter with preemptive protection: Among many embodiments, a power conversion apparatus and a method for converting power are disclosed. The power conversion apparatus may include switching components configured to create an alternating current; a preemptive detector arranged and configured to provide, in advance of the alternating current reaching a zero-crossing, a control signal responsive... Agent:
20140043882 - Modular power converters usable alone or in a multiphase power converter: A power converter module for use alone or with other modules in a multiphase power converter. The power converter module has an enclosure that surrounds internal components to prevent radiation of electromagnetic energy, which internal components also limit conduction of electromagnetic energy. The internal components include an EMI filter, a... Agent: Northern Power Systems Utility Scale, Inc.Previous industry: Illumination
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