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US20140036560 CIRCUIT AND METHOD FOR MEASURING AVAILABLE POWER IN A WIRELESS POWER SYSTEM  
A resonant wireless power receiver that includes an electromagnetic resonator having one or more inductive elements that are arranged to form a receiver coil and a network of passive components...
US20110075459 Power Factor Correction Circuits, Systems and Power Supplies Operable With Different Input Voltages  
A cost effective solution for power factor correction in power devices operating at two widely separated input voltages comprises two unequal power rails. One power rail is optimized for operation...
US20110000900 INVERTER OUTPUT RECTIFIER CIRCUIT  
In a power source of a welding system, an inverter rectifier output circuit and method for reducing the blocking voltages across saturable reactors associated with a rectifier coupled to a...
US20120127707 VERSATILE SEALED LED LAMP  
A lamp assembly (1800) may include a circuit board (201), one or more light-emitting devices (100) disposed on the circuit board (201), a heat sink (600) in thermal contact with a surface of the...
US20100328975 POWER CONVERTER  
In a power converter for converting AC power supplied from an AC power source or DC power supplied from a DC power source to DC power or AC power having predetermined voltage and frequency...
US20140104898 WIRELESS ELECTRIC POWER RECEIVER FOR WIRELESSLY REGULATING ELECTRIC POWER USING SWITCH  
A wireless electric power receiver for receiving wireless electric power from a wireless electric transmitter is provided. The wireless electric power receiver includes an electric power receiving...
US20140056047 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...
US20120092914 SWITCHING BRANCH FOR THREE-LEVEL RECTIFIER AND METHOD FOR CONTROLLING SWITCHING BRANCH FOR THREE-LEVEL RECTIFIER  
A switching branch for a three-level rectifier and a method for controlling a switching branch for a three-level rectifier are provided. The switching branch includes a first diode and a second...
US20120257428 Power Supply Circuit Device  
A power supply circuit device comprises a relay, a main rectifier circuit, a standby rectifier circuit, a standby power supply circuit and a main power supply circuit. The main rectifier circuit...
US20110141781 POWER SUPPLY CONTINUOUS INPUT VOLTAGE EXTENDER  
A system and method for providing acceptable output power from a wide range of received power, comprising: outputting a received voltage as an output voltage if the received voltage does not...
US20080259664 NETWORK TRANSMIT/RECEIVE PORT  
A network transmit/receive port, including transformers, a rectifying unit, a powered device controller unit, and a DC-DC converter controller, is provided. Each circuit unit is integrated in a...
US20120026768 FACILITY POWER SUPPLY WITH POWER-FACTOR CORRECTION  
An embodiment of a power supply includes an input node, a converter stage, and an outlet. The input node is operable to receive an input AC signal having peak portions and non-peak portions. The...
US20150256100 CIRCUIT TO KEEP ELECTRONIC TRANSFORMERS WORKING WHILE UNDER-LOADED  
O An LED light source includes a sub-circuit (24) that is connectable via terminals (12,13) to an electronic transformer and to a powered circuit including at least one LED (4). The sub-circuit...
US20140119084 AC Input Voltage Detection Circuit and AC/DC Power Source  
An AC input voltage detection circuit of detecting abnormality of an AC input voltage inputted to an AC/DC converter, includes: a first comparator circuit configured to compare the AC input...
US20130155744 Method and Device for Determining the Value of a Characteristic Quantity of a System for Powering a Load  
This method determines the value of a characteristic quantity (U1dc, U2dc) of a system for powering a load which comprises M DC-DC converters, connected in series to the terminals of the load and...
US20120188810 RECTIFIER SYSTEM  
A rectifier system, e.g., for a generator, includes a bridge system having a predefined number of rectifier elements, at least one rectifier element being a rectifier element having at least one...
US20120201065 POWER FACTOR CORRECTION CIRCUIT  
A first error amplification circuit amplifies a difference between a predetermined reference voltage and a first detection voltage that corresponds to the output voltage of a DC/DC converter, so...
US20140218987 POWER SUPPLY WITH LOW ELECTRO-MAGNETIC INTERFERENCE AND INDUCTOR FOR POWER SUPPLY WITH LOW ELECTRO-MAGNETIC INTERFERENCE  
A power supply circuit includes an input configured to receive an input voltage, an output configured to supply an output voltage, at least one inductor, at least one diode, and at least one...
US20110013435 AC DETECTION CIRCUIT FOR POWER SUPPLY  
There is provided an alternating current (AC) detection circuit for power supply, the AC circuit including: a rectifying part rectifying an AC voltage; a voltage division part dividing the voltage...
US20120155137 POWER STEALING CIRCUITRY FOR A CONTROL DEVICE  
A power stealing circuit for stealing power to operate a control device is disclosed. In one illustrative embodiment, power may be periodically or intermittently diverted from a power source to a...
US20130111225 POWER SUPPLIES WITH LAGGING POWER-FACTOR  
Apparatus related to power factor are provided. A power supply provides regulated power to a load or loads. The power supply is coupled to a source of alternating-current (AC) voltage. A...
US20100302820 Inverter drive power supply circuit  
An inverter drive power supply circuit for driving a plurality of inverter switching devices that form an inverter circuit, includes a number N of transformers (N is an integer equal to or larger...
US20150222200 INTERLEAVED 12-PULSE RECTIFIER  
Among other things, one or more techniques and/or systems are provided for converting a three-phase AC voltage to a 12-pulse DC voltage, drawing a 12-pulse AC current from a three-phase network. A...
US20150194906 MOSFET BRIDGE CIRCUIT  
In a general aspect, a bridge circuit can include a first bridge including a first plurality of MOSFETs and including a first input terminal and a second input terminal, and a second bridge...
US20140153306 AC/DC CONVERTER AND METHOD OF CORRECTING POWER FACTOR  
An AC/DC converter includes a rectifier circuit and an active power factor correction circuit. The rectifier circuit is electrically connected to a power supply, and is used to convert an...
US20110103105 POWER TRANSFORMER AND POWER CONVERTER INCORPORATING SAME  
Embodiments of the present invention provide novel techniques for using multiple 18-pulse rectifier circuits in parallel. In particular, each rectifier circuit may include an autotransformer...
US20120069615 BRIDGELESS POWER FACTOR CORRECTION CONVERTER  
A bridgeless power factor correction converter is configured such that a gate driver controls the ON ratio of a booster converter switch so that the ON ratio is gradually increased from 0, i.e.,...
US20150236608 POWER FACTOR CONVERTER WITH NONLINEAR CONVERSION RATIO  
The present invention provides a power-factor converter with nonlinear conversion ratio, wherein the power-factor converter includes a first inductor, a second inductor, a rectifier circuit and a...
US20130070498 POWER ADJUSTABLE, ISOLATED AND TRANSFORMERLESS AC TO DC POWER CIRCUIT  
A power adjustable, isolated and tranformerless AC to DC power circuit is revealed. The AC to DC power circuit includes a first reactance component, a second reactance component, a third reactance...
US20120182775 THREE-PHASE BUCK-BOOST POWER FACTOR CORRECTION CIRCUIT AND CONTROLLING METHOD THEREOF  
The configurations of a three-phase buck-boost power factor correction (PFC) circuit and a controlling method thereof are provided in the present invention. The proposed circuit includes a first...
US20110157942 Controllable Universal Supply with Reactive Power Management  
Apparatus and associated methods involve a controllable supply adapted for controlling switch phasing and pulse width to substantially equalize power in adjacent quadrants of a sinusoidal source...
US20130083577 OFFLINE LOW VOLTAGE DC OUTPUT CIRCUIT WITH INTEGRATED FULL BRIDGE RECTIFIERS  
The present disclosure discloses an offline low voltage DC output circuit with integrated full bridge rectifiers. The offline low voltage DC output circuit comprises two depletion high voltage...
US20120008355 PASSIVE THREE PHASE INPUT CURRENT HARMONIC REDUCTION AND POWER FACTOR CORRECTION CIRCUIT FOR POWER SUPPLIES  
A harmonic input current reduction and power factor correction circuit for three phase, power supplies. The circuit includes passive elements including a series inductance and capacitor connected...
US20140190155 SYSTEM AND METHOD FOR ENERGY STORAGE AND RETRIEVAL  
Disclosed herein is a system including a generator/motor subsystem configured to interchangeably impart and receive mechanical force; a stiff DC bus; and power conditioning circuitry electrically...
US20110157940 POWER FACTOR CORRECTOR WITH HIGH POWER FACTOR AT LOW LOAD OR HIGH MAINS VOLTAGE CONDITIONS  
Various exemplary embodiments relate to a power factor corrector for low loads and a related method. The power factor corrector raises power factor at low loads or high mains voltages by having...
US20140043870 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...
US20130314962 THREE-PHASE REACTOR POWER SAVING DEVICE  
A three-phase reactor power saving device, comprising: a first capacitor set, connected electrically to a three-phase AC power supply, to store electric energy; a reactor set, connected...
US20110157941 SYNCHRONOUS VCC GENERATOR FOR SWITCHING VOLTAGE REGULATOR  
A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an...
US20150023078 POWER DIMMER  
A control circuit varies the power of a load powered by an alternating voltage, comprising: a first thyristor and a first diode connected in antiparallel between first and second nodes, the...
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)...
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...
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...
US20120201058 MOBILE DEVICE ADAPTER AND CHARGER  
Systems and methods are presented for an improved high power density power adapter. On one potential embodiment, an improved power adapter includes an AC input; a rectifier coupled to the AC...
US20110317459 CONTROLLER FOR A POWER CONVERSION CIRCUIT  
A power conversion controller for controlling the operation of a switch in a power conversion circuit. The switch having a “time-on” property and a “clamping frequency” property, in use. The power...
US20120120697 Three-phase isolated rectifer with power factor correction  
A new class of Three-Phase Isolated Rectifiers with Power Factor Correction provides a high efficiency, small size and low cost due to direct conversion from three-phase input voltage to output DC...
US20130235632 Active Rectifier with Modulation  
Described is a rectification circuit to generate a direct current at an output of the rectification circuit subject to an alternating voltage at an input of the rectification circuit. The...
US20140347901 RECTIFIER CIRCUIT AND POWER SUPPLY INCLUDING THE SAME  
There is provided a rectifier circuit, including a rectifying unit rectifying input power to output rectified power corresponding to a magnitude of the input power and including a plurality of...
US20130091872 BUCK-BOOST RECTIFIER, REFRIGERATION SYSTEM INCLUDING A BUCK-BOOST RECTIFIER, AND METHOD OF PROVIDING POWER TO A REFRIGERATION UNIT VIA A BUCK-BOOST RECTIFIER  
A buck/boost rectifier. The rectifier is connectable to an alternating current power source and includes an upper bus, a lower bus, an upper rectifier, a lower rectifier, a pulse-width-modulation...
US20120075895 Universal-Voltage Discrete Input Circuit  
A universal-voltage discrete input circuit uses a high voltage depletion-mode field effect transistor in combination with a low-voltage, adjustable precision shunt regulator and an isolation...