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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....
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...
US20110176333 Power Converter with Isolated and Regulation Stages  
In a power converter, the duty cycle of a primary winding circuit causes near continuous flow of power through the primary and secondary winding circuits during normal operation. By providing no...
US20110149607 Controller for a Power Converter  
A power converter employing a controller configured to increase a dead time between conduction periods of first and second power switches therein and method of operating the same. In one...
US20140211529 METHODS AND SYSTEMS FOR OPERATING A BI-DIRECTIONAL MICRO INVERTER  
A micro inverter includes a synchronous bi-directional power converter and a controller communicatively coupled to the synchronous bi-directional power converter. The controller is configured to...
US20110255314 SWITCHED POWER CONVERTER WITH EXTENDED HOLD-UP TIME  
A power supply module having a PFC stage has a hold-up capacitor (34) for continuing output power for a time after an ac power supply (2) stops. The hold-up capacitor is charged by a winding (40)...
US20110134664 Startup Circuit and Power Converter Employing the Same  
A startup circuit with reduced power dissipation, method of operating the same and a power converter employing the startup circuit. In one embodiment, the startup circuit for a controller includes...
US20130301319 PRINTED CIRCUIT BOARD  
A power source circuit includes a switching circuit 4 that converts a direct current voltage obtained by converting an alternating voltage from an alternating power source input through a pair of...
US20130272038 EXCITATION CONTROL CIRCUIT, CONTROL METHOD AND ELECTRICALLY EXCITED WIND POWER SYSTEM HAVING THE SAME  
The present invention provides an excitation control circuit, a control method using the same and an electrically excited wind power system having the same. The excitation control circuit comprises...
US20090256419 AC/AC POWER CONVERTER FOR AIRCRAFT  
A matrix converter circuit having two AC/AC matrix converters coupled in parallel in a first mode to power a starter and decoupled in a second mode to each power separate functions used in aircraft...
US20140268968 TRANSFORMER FOR AN INVERTER SYSTEM AND AN INVERTER SYSTEM COMPRISING THE TRANSFORMER  
A transformer comprises a primary winding 231; a secondary winding 233; a first electrostatic screen 234 located between the primary winding and the secondary winding and most proximate to the...
US20130200829 POWER SUPPLY APPARATUS OF HOME APPLIANCE  
A power supply apparatus of a home appliance which meets standby power regulation of 0.5 watts using one SMPS. As compared with a general circuit which meets the standby power regulation using two...
US20110134667 REDUNDANT CONTROL METHOD FOR A POLYPHASE CONVERTER WITH DISTRIBUTED ENERGY STORES  
The invention relates to a method for controlling a converter having at least two phase modules (100) that comprise an upper and a lower valve branch (T1, . . . , T6), each of which is equipped...
US20110286253 Three-phase inverter circuit and method for operating a three-phase inverter circuit  
A three-phase inverter circuit includes an inverter comprising a plurality of controllable power switches, and an electronic control device adapted to control the power switches. The control device...
US20120087163 POWER SUPPLY APPARATUS  
A relay contact is connected between positive power supply input terminals of first and second inverters, and a relay contact is connected between negative power supply input terminals of the...
US20140328102 POWER SOURCE INVERTER FOR USE WITH A PHOTOVOLTAIC SOLAR PANEL  
An improved topology is presented for a single phase power source inverter that is designed to minimize double frequency ripple. The inverter circuit includes: a capacitor coupled in parallel...
US20130051103 METHOD OF CONTROLLING AN INVERTER AND A CONTROLLER FOR CONTROLLING AN INVERTER  
A method of controlling an inverter for converting a DC input to an AC output, the method including measuring a voltage of an AC output produced by the inverter; determining a drive voltage for...
US20110310641 METHOD OF UPGRADING A PLANT FOR TRANSMITTING ELECTRIC POWER AND SUCH A PLANT  
A plant for transmitting electric power through HVDC includes two converter stations interconnected by a monopolar direct voltage network and each having an alternating voltage side for feeding...
US20120063175 COMPENSATION CIRCUIT AND METHOD FOR A SYNCHRONOUS RECTIFIER DRIVER  
Provided are circuits and methods for driving the synchronous rectifier (SR) of a power converter. A non-linear voltage sense compensator is applied across the drain and source of the SR, and a...