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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 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 the...
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 ripple...
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 of...
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...
US20130121041 POWER CONVERTER BASED ON H-BRIDGES  
A power converter includes an active front end (AFE) that is coupled by a dc link stage to a plurality of H-bridge inverters. One or more multi-phase electro-magnetic energy conversion devices,...
US20140265594 Mother/Daughterboard Power Supply  
Circuits are described that permit the efficient supply of power from a backplane such as that contained in a motherboard. In one embodiment, the power supply stores charge at a relatively high...
US20110043133 LED-Based Lighting Power Supplies With Power Factor Correction And Dimming Control  
A power supply for powering one or more loads includes a boost circuit with power factor correction (PFC) that provides an operating voltage from an electrical power source, and a dimmer detection...
US20120230069 STARTUP CONTROL CIRCUIT WITH ACCELERATION STARTUP FUNCTION AND METHOD FOR OPERATING THE SAME  
A startup control circuit with an acceleration startup function and a method for operating the same are disclosed. The startup control circuit is applied to a power supply. A power switch, which is...
US20120294049 PARALLEL RUNNING CONTROL APPARATUS FOR INVERTER GENERATORS  
In a parallel running control apparatus for an inverter generator A having a first, second and third inverters each connected to three windings wound around an alternator driven by an engine and...
US20120176821 Startup Circuit and Input Capacitor Balancing Circuit  
In one embodiment, an input capacitor balancing circuit for a power supply is provided. The circuit includes an input capacitance operable to filter input power for the power supply. The input...
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 input;...
US20140016363 SWITCHING POWER SUPPLY  
Aspects of the invention provide a switching power supply that exhibits an improved conversion efficiency. In aspects of the invention, a load condition detecting circuit sets a threshold voltage...
US20120140539 GAS COOLED TRACTION DRIVE INVERTER  
The present invention provides a modular circuit card configuration for distributing heat among a plurality of circuit cards. Each circuit card includes a housing adapted to dissipate heat in...
US20090244815 Modular electrical bus system with built in ground circuit  
A modular electrical bus system has a grounding circuit through a plurality of modular I/O units with each unit being both electrically and mechanically connectable together via a bridge member...
US20110096572 LOW POWER CONSUMPTION START-UP CIRCUIT WITH DYNAMIC SWITCHING  
A start-up circuit in a switch-mode power converter that employs a Zener diode to provide a reference voltage to reduce the power consumption and the size of the start-up circuit. The start-up...
US20130182462 LINEAR SYNCHRONOUS RECTIFIER DRIVE CIRCUIT  
A drive circuit arranged to drive a synchronous rectifier of a power converter includes a differential amplifier stage connected to the synchronous rectifier and arranged to supply a drive signal...
US20130215650 VARIABLE TIME CLAMP FOR A POWER SUPPLY CONTROLLER  
An example integrated circuit for use in a power supply includes a feedback terminal, a controller and a clamp. The feedback terminal is to be coupled to receive a feedback signal that is...
US20130141958 MANAGEMENT SYSTEM FOR VARIABLE-RESOURCE ENERGY GENERATION SYSTEMS  
The object of the invention is to provide an energy management system for variable resource energy generating systems, which incorporates means for the storing of energy and the management thereof....
US20140268964 MULTI-STAGE PROGRAMMABLE RECTIFIER WITH EFFICIENCY TRACKING  
Examples of multi-stage programmable rectifiers are provided herein. Each rectifier stage can include a first transistor and a switch connected to the first transistor. A threshold voltage of the...
US20140204633 Distributed Power Generation Interface  
Described herein are methods, systems, and apparatus for a controller for a power circuit that interfaces distributed power generation with a power distribution grid, comprising: a first portion,...
US20140029309 POWER CONVERTER WITH LOW RIPPLE OUTPUT  
A power supply includes two or more input waveforms being shaped or selected so that after being separately level-shifted and rectified, their additive combination results in a DC output waveform...
US20120051103 POWER CONVERTER  
A power converter converts DC power supplied from a first DC power supply and a second DC power supply into AC power and supplies the AC power to a load. The power converter includes a protection...
US20110222314 POWER SUPPLY WITH REDUCED POWER CONSUMPTION  
A power supply includes an isolated power converter and a DC/DC converter. The isolated power converter includes a primary winding connected to a primary power stage, a secondary winding to...
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 pow...
US20140268938 AC VOLTAGE SENSOR WITH LOW POWER CONSUMPTION  
A power converter controller includes an input sense circuit to receive an input sense signal representative of an input of a power converter. A zero-crossing detector is coupled to the input sense...
US20130194835 FLYBACK CONVERTER WITH FORWARD CONVERTER RESET CLAMP  
A power supply includes a forward converter having a first transformer coupled to an input of the power supply and to a first voltage output. The power supply also includes a separate flyback...
US20140029316 METHOD AND CIRCUIT FOR CONTROLLING A SWITCHING REGULATOR  
A method for controlling a switching regulator includes defining a waiting time during which a trigger signal corresponding to a recirculation signal of the switching regulator is ignored holding a...
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...
US20140050000 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...
US20110051480 20º PHASE-SHIFTING AUTOTRANSFORMER  
The invention relates to autotransformers used notably for converting alternating (AC) electric power into direct (DC) power. And more precisely, to autotransformers designed to be connected to a...
US20120188806 POWER DISTRIBUTION SYSTEM  
A power distribution system includes a DC-DC converter which outputs a DC power after converting the DC power outputted from a DC power source to a desired voltage level. In the power distribution...
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...
US20140022829 Hybrid Adaptive Power Factor Correction Schemes For Switching Power Converters  
The embodiments disclosed herein describe a method of a controller of a switching power converter that provides a configurable power factor control method for the switching power converter. In one...
US20140355309 SELECTED-PARAMETER ADAPTIVE SWITCHING FOR POWER CONVERTERS  
A selected-parameter adaptively switched power conversion system, for example, includes a counter for determining a period of an output oscillation a power supply switch, where the output...