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US20110235370 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...
US20080055948 Ripple-free drive circuit for LED backlights of LCD panel  
A ripple-free drive circuit for LED backlights of an LCD panel includes a PFC circuit, a DC/DC converter, three output load units, and a drive voltage resetter. The PFC circuit is connected with...
US20130107586 SYSTEM FOR IMPROVED WIND TURBINE GENERATOR PERFORMANCE  
A system for improving wind turbine generator performance is disclosed. In one aspect a rotary power generation system is provided, including: a rotary power generator for generating...
US20120250372 GRID TIED INVERTER, SYSTEM AND METHOD  
A grid tied inverter comprising an unfolding circuit connectable to an electricity grid; and a DC to DC current fed converter operable to generate a current waveform from a battery, the current...
US20120063174 POWER FACTOR CORRECT CURRENT RESONANCE CONVERTER  
A power factor correct current resonance converter is disclosed which eliminates interference of switching operations between two cascade-connected converter circuits. The power factor correct...
US20120176818 FEEDBACK OF OUTPUT VOLTAGE ERROR VIA CURRENT SENSE WINDING  
A power converter constituted of: a control circuitry; an electronically controlled switch responsive to the control circuitry; a power transformer exhibiting a primary winding and a secondary...
US20120243280 INVERTER FOR CONVERTING A DIRECT CURRENT VOLTAGE INTO AN ALTERNATING CURRENT VOLTAGE AND METHOD THEREOF  
An inverter includes a first half period circuit, a second half period circuit, a first inductor, and a second inductor. A DC voltage source is used for providing a DC voltage. A loop of the first...
US20150016160 POWER CONVERTER  
A power converter includes inverters, AC sides of the inverters being connected in parallel, and a controller configured to control total output power of the inverters by controlling output power...
US20120033469 Electric Power Conversion System Having An Adaptable Transformer Turns Ratio For Improved Efficiency  
An electric power conversion system has an adaptable transformer turns ratio for improved efficiency. The transformer has multiple taps on its primary. Switching circuitry is configured to connect...
US20150146466 ACTIVE RECTIFIER AND CIRCUIT FOR COMPENSATING FOR REVERSE CURRENT LEAKAGE USING TIME DELAY SCHEME FOR ZERO REVERSE LEAKAGE CURRENT  
A method of compensating for reverse current leakage in an active rectifier may include advancing an output of a comparator by a predetermined period of time by applying a predetermined offset...
US20140233270 VOLTAGE CONVERSION AND CHARGING FROM LOW BIPOLAR INPUT VOLTAGE  
A circuit includes a transformer configured with a primary winding and a secondary winding that are driven from a voltage supplied by a thermoelectric generator (TEG). The circuit includes a...
US20120026764 CONTROL SYSTEM FOR HIGH-EFFICIENCY OPERATION IN PARALLEL INVERTER INSTALLATIONS  
A control system for parallel connected inverter legs energized by a power source and configured for servicing a load is disclosed. The invention facilitates the number of running inverter legs to...
US20090322082 WIND TURBINE WITH PARALLEL CONVERTERS UTILIZING A PLURALITY OF ISOLATED TRANSFORMER WINDINGS  
A system and method are provided to isolate outputs of parallel converter threads of a power system converter of a wind turbine generator by utilizing isolated power windings on the output...
US20120230073 TWO-WIRE DIMMER SWITCH FOR LOW-POWER LOADS  
A two-wire load control device (such as, a dimmer switch) for controlling the amount of power delivered from an AC power source to an electrical load (such as, a high-efficiency lighting load)...
US20120033471 TWO-WIRE DIMMER SWITCH FOR LOW-POWER LOADS  
A two-wire load control device (such as, a dimmer switch) for controlling the amount of power delivered from an AC power source to an electrical load (such as, a high-efficiency lighting load)...
US20110058391 INVERTER DEVICE  
An inverter device includes a power module, which converts DC power into AC power, and a bus bar, which is fastened to a terminal of the power module by a bolt. In a state in which a current...
US20120025735 FLYBACK WITH SWITCHING FREQUENCY RESPONSIVE TO LOAD AND INPUT VOLTAGE  
A power source constituted of: a power factor corrector controller; an electronically controlled switch responsive to the power factor corrector controller; a first inductor serially connected...
US20140160811 RAILWAY POWER CONDITIONER FOR CO-PHASE TRACTION SUPPLY SYSTEM  
A railway power conditioner includes a DC-AC converter and a AC-DC converter for performing power conversion between AC power and DC power, a DC bus connected between the DC-AC converter and the...
US20120327687 POWER ADAPTOR WITH POWER-SAVING MECHANISM  
A power adaptor includes an inverter, a feedback circuit, a detecting unit, and an adjusting unit. The inverter is configured to convert an input voltage into an output voltage according to a...
US20120228938 DC-AC Inverter Assembly, in Particular Solar Cell Inverter  
A DC-AC inverter assembly, in particular a solar cell inverter of a photovoltaic plant, is disclosed. The inverter includes a semiconductor bridge circuit and wherein a DC chopper controller is...
US20130063984 DEAD-TIME OPTIMIZATION OF DC-DC CONVERTERS  
Representative implementations of devices and techniques determine the timing of switches associated with a dc-dc converter. The determination is based on a body diode conduction of at least one...
US20120187869 POWER SUPPLY DEVICE  
In various embodiments, an electrical power supply device may include a transformer with a primary winding having coupled thereto a main switch switchable on and off to connect and disconnect said...
US20140092656 POWER SUPPLY CIRCUIT  
A power supply circuit is intended to suppress power consumption when a load is not driven and to shorten a required time to be taken until a boosted voltage to be supplied to a high-side MOS...
US20090244944 POWER CONVERTER SYSTEM THAT OPERATES EFFICIENTLY OVER A RANGE OF LOAD CONDITIONS  
A power converter system supplies power to one or more loads. The power converter system comprises at least one power converter operating at a desired efficiency; and a power storage system...
US20090032229 METHODS AND SYSTEMS FOR COOLING INVERTERS FOR VEHICLES  
A method for cooling an inverter of a vehicle system includes the steps of providing a flow of cooling fluid to the inverter, determining a value of a variable that is influenced at least in part...
US20100302814 CONTROLLER FOR SWITCHING POWER SUPPLY  
A switching power supply has an inductor that includes a coil. A chopper circuit chops the primary current drawn through the coil, for the inductor to output an induced current. A multifunction...
US20130119895 LED DRIVING CIRCUIT AND DRIVING CONTROLLER FOR CONTROLLING THE SAME  
A driving controller for driving a load is disclosed. The driving circuit includes a driving power supply and the driving controller. The driving power supply provides a first power source to the...
US20110261591 CONVERTER FOR SINGLE-PHASE AND THREE-PHASE OPERATION, D.C. VOLTAGE SUPPLY AND BATTERY CHARGER  
A Converter (1a.1c) for single-phase and three-phase Operation which comprises a three-phase rectifier to which three coils (La, Lb, Lc) are connected on the mains side is described. A first coil...
US20140098584 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...
US20130234641 CONVERTER SYSTEM  
The present disclosure discloses a converter system, which at least includes the first and second back-to-back converters. The first back-to-back converter includes a first rectifier module and a...
US20110141783 CONTROL OF FOUR-LEG TRANSFORMERLESS UNINTERRUPTIBLE POWER SUPPLY  
A system and method for managing a 4 leg transformerless Uninterrupted Power Supply is disclosed. The system comprises a 3 leg inverter modulation signal generator that applies signals to a...
US20080315805 CHOPPER CIRCUIT TOPOLOGIES FOR ADAPTING AN ELECTRICAL BRAKING SYSTEM IN A TRACTION VEHICLE  
An adaptable electrical braking system for an electrical propulsion system of a traction vehicle is provided. The electrical braking system is configured to dissipate electrical energy in a...
US20110149620 Device and Method for Limiting Drain-Source Voltage of Transformer-Coupled Push Pull Power Conversion Circuit  
A circuit is proposed for limiting maximum switching FET drain-source voltage (VDS) of a transformer-coupled push pull power converter with maximum DC supply voltage VIN—MAX. Maximum VDS is...
US20150085542 MICRO INVERTER OF SOLAR POWER SYSTEM AND METHOD OF OPERATING THE SAME  
A method of operating a micro inverter of a solar power system includes following steps: First, an output power value of a solar photovoltaic module is acquired. Afterward, it is to judge whether...
US20150113295 RECEIVING INPUT POWER MEASUREMENTS TO MANAGE A RECTIFIER  
Examples disclose a controller with a meter interface to receive a first input power measurement provided from a meter. The meter delivers input power to a rectifier which delivers power to a...
US20140119088 THREE-LEVEL INVERTER AND POWER SUPPLY EQUIPMENT  
The present application provides a three-level inverter and power supply equipment, including: a first IGBT, where a collector thereof is connected to a positive direct current bus, an emitter...
US20120026757 CONVERTER CONTROLLER  
Provided is a converter controller capable of preventing destruction of an element such as an auxiliary switch by preventing operation interference between auxiliary circuits of respective phases...
US20110127837 POWER CONVERSION APPARATUS  
A power conversion apparatus includes an inverter for converting DC power to AC power for supply to a load, a converter for converting AC power from an AC power supply to DC power for supply to...
US20140177303 VOLT-SECOND INTEGRATION CABLE COMPENSATION CIRCUIT  
A power converter (such as a battery charger) includes a cable configured to deliver a source voltage and current to a load, where the cable is anticipated to drop some voltage as the load current...
US20140313781 Stacked Switched Capacitor Energy Buffer Circuit Architecture  
Described herein is a stacked switched capacitor (SSC) energy buffer circuit architecture and related design and control techniques.
US20130163297 SINGLE PHASE REDUNDANT POWER SUPPLY SYSTEMS FOR REDUCING PHASE CURRENT IMBALANCES  
A single phase redundant power supply system may include a first power supply having an input coupled to a first phase voltage in a polyphase power distribution system and an output coupled to a...
US20110051476 ENVIRONMENTALLY FRIENDLY POWER SUPPLY  
A power supply for converting AC to a regulated DC output current, utilizing two serial switched mode power supplies, the first providing an intermediate DC output voltage with only moderate...
US20120307527 DC-DC CONVERTER FOR ELECTRIC POWER USING A DC ELECTRIC POWER SOURCE  
The converter comprises an inverter and a conversion unit in which a transformer powers a controlled rectifier formed by saturable inductors and power diodes. According to the invention, a series...
US20130021830 INSULATION IN A POWER TRANSMISSION SYSTEM  
A substation has a converter comprising a first set (S1) of series connected converter valve elements provided between a first (V1) and a second (V2) potential, where the absolute value of the...
US20130242628 SOLAR POWER CONDITIONER  
A solar power conditioner includes: a synchronous controller; and electric power converters connected in series with each other and arranged at panel groups, respectively. Each electric power...
US20130308361 TRANSFORMER TAP-CHANGING CIRCUIT AND METHOD OF MAKING SAME  
A transformer tap-changing circuit comprises an apparatus that includes a transformer comprising a secondary winding configured to inductively couple to a primary winding when a current is passed...
US20140183960 PHOTOVOLTAIC POWER GENERATION SYSTEM  
A photovoltaic (PV) power generation system comprising an array of PV cell modules arranged in strings connected via secondary stage power efficiency optimizers to a central inverter is provided....
US20140376285 Auxiliary Power Supplies  
The invention relates to auxiliary power supplies.
US20130148390 ELECTRIC CIRCUIT FOR HIGH VOLTAGE POWER CONVERSION  
The present invention provides an electric circuit wherein a multi-phase bridge is connected in series with a plurality of single-phase bridges. The multi-phase bridge is composed of a plurality...
US20120057376 POWER SUPPLY CIRCUIT  
It is an object to obtain a detection circuit for detecting feedback voltage without variation in output voltage/current or in output voltage by the operation temperature, and a power supply...