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US20140268966 HIGH-VOLTAGE INVERTER  
An inverter includes transformers having identical characteristics. Exciting windings of the transformers are connected in parallel so that the transformers are excited simultaneously. Output...
US20140355324 INVERTER UNIT  
An inverter unit includes a first circuit board and a second circuit board arranged at a predetermined space so as to face each other. Each of the first circuit board and the second circuit board...
US20150043257 INRUSH CURRENT SUPPRESSOR CIRCUIT  
Disclosed is an inrush current suppressor circuit of a power supply circuit that supplies stand-by voltage from AC voltage. At a stand-by mode, only a diode and a resistor for suppressing inrush...
US20070159858 Bi-directional energy conversion system  
An alternating current (AC) to direct current (DC) high efficiency conversion architecture comprises an AC-to-DC conversion input stage operative to receive an instantaneous AC input, a DC output...
US20150194874 HARMONIC DISPLACEMENT REDUCTION  
Reducing voltage excursions in a circuit comprises: performing resonant commutation, including transferring, via a first set of one or more diodes, energy stored by a set of one or more parasitic...
US20150207414 SYSTEM AND METHOD FOR SUPPLYING A SYNCHRONOUS RECTIFIER DRIVER CIRCUIT  
Methods for supplying a synchronous rectifier (SR) driver circuit and supply voltage generation circuits for a SR driver circuit are described. In one embodiment, a method for supplying a SR...
US20150194875 SWITCHING POWER SUPPLY STARTUP CIRCUIT HAVING NORMALLY ON EMITTER-SWITCHED CURRENT SOURCE  
A power converter startup circuit establishes an operating voltage for control circuitry during startup and is then disabled to reduce no-load power dissipation. The startup circuit has a normally...
US20120250379 OTA Feedback Mechanism for Fixed Feedback Voltage Regulators  
An operational transconductance amplifier used in conjunction with a multiple chip voltage feedback technique allows multiple strings of LEDs and current sinks to be efficiently powered by a...
US20150263599 POWER CONVERSION SYSTEM FOR CONTROLLING HARMONICS  
A power conversion system for controlling harmonics, which uses the Fourier transform analysis to calculate the harmonics element of each current, and adds the harmonicscompensation strategy into...
US20140333205 STABILIZATION CIRCUIT FOR LOW-VOLTAGE LIGHTING  
An electronic transformer stabilization circuit includes a detection circuit and a reactive load. The detection circuit may be configured to receive a transformer output or a transformer signal...
US20120195081 SYSTEM AND METHOD FOR INCREASING DC POWER SYSTEM EFFICIENCY WITHOUT REQUIRING A LARGE BATTERY RESERVE  
A system for increasing parallel rectifier DC power system efficiency. In one embodiment, the system includes: (1) a controller configured to sense and classify a load magnitude change into groups...
US20120250364 FLYBACK CONVERTER WITH FORWARD CONVERTER RESET CLAMP  
A power supply includes a first power converter having a first transformer coupled to an input of the power supply and to a first output of the power supply. A clamp reset circuit is coupled to...
US20140009986 POWER CONVERSION CIRCUITS  
According to one embodiment, an AC power system includes a first AC/DC converter to be coupled to a direct current (DC) load and a multi-phase AC power supply. The system further includes a second...
US20110211372 COMPENSATION CIRCUITS AND CONTROL METHODS OF SWITCHED MODE POWER SUPPLY  
A compensation circuit has a resistor, a switch and a compensation capacitor. The resistor and the switch are connected in series between a power node and a compensation node. The compensation...
US20130208518 ELECTRIC POWER CONVERTER  
An electric power converter includes a DC stabilization circuit (2) configured to stabilize a DC voltage from DC power supply (1), and an inverter (3) configured to convert the DC voltage...
US20140355322 Stacked Switched Capacitor Energy Buffer Circuit  
A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low...
US20140268919 SWITCHING POWER CONVERTER WITH SECONDARY TO PRIMARY MESSAGING  
A primary-only power supply enables transmission of a signal or message from the secondary side of an isolated power supply to the primary side. To enable robust detection of the message without...
US20120176820 Switching Power Converter Having Optimal Dynamic Load Response with Ultra-Low No Load Power Consumption  
A switch controller is disclosed that adaptively controls the operating frequency of a switching power converter in order to improve one-time load response and repetitive dynamic load responses....
US20110211378 Utility for full wave rectified current-fed class of DC galvanically isolated DC-to-DC power conversion topologies allows reduction of working voltage magnitudes and improvement to efficiency for secondary circuits  
New utility of an existing class of DC galvanically isolated current sourcing circuit topologies for power conversion simultaneously allows improvement in its secondary circuit(s) to power...
US20140233286 Distributed Power Harvesting Systems Using DC Power Sources  
A method for maintaining reliability of a distributed power system including a power converter having input terminals and output terminals. Input power is received at the input terminals. The...
US20120287686 MATRIX CONVERTER  
A matrix converter according to an embodiment includes a control unit generates a highest phase-to-phase voltage among load side phase-to-phase voltages by controlling bidirectional switches that...
US20130279229 POWER INVERTER CIRCUIT  
A power inverter circuit 1 is a bridge power inverter circuit comprising first and second switching elements 11, 12 sequentially connected in series between input terminals on higher and lower...
US20130088899 MULTI-PHASE CONVERTER  
A multi-phase converter of one of the embodiments includes: a plurality of AC/DC converters which are connected in parallel to each other, wherein each of the plurality of AC/DC converters...
US20120206947 Load Detection for a Low Power Mode in an AC-DC Adapter  
Various embodiments of the present invention relate to AC-DC adapters, and more particularly, to systems, devices and methods of employing a load detector to detect a load condition of the AC-DC...
US20140085939 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...
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...