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US20140140105 HIGH EFFICIENCY AND FAST RESPONSE AC-DC VOLTAGE CONVERTERS  
The present invention discloses circuits and methods for high efficiency and fast response AC-DC voltage converters. In one embodiment, an AC-DC voltage converter can include: (i) a first stage...
US20130329463 HIGH EFFICIENCY AND FAST RESPONSE AC-DC VOLTAGE CONVERTERS  
The present invention discloses circuits and methods for high efficiency and fast response AC-DC voltage converters. In one embodiment, an AC-DC voltage converter can include: (i) a first stage...
US20110157935 Fully Resonant Power Supply  
A power supply produces one or more conditioned and scaled output voltages with low noise. The power supply has various components to produce a plurality of higher output voltages from a plurality...
US20140176086 CAPACITOR CHARGER SYSTEM, POWER MODULATOR AND RESONANT POWER CONVERTER  
A capacitor charger system has a resonant power converter to connect to a capacitor via a rectifier. The resonant power converter has a switch-based bridge network, an internal transformer, a...
US20120170323 CHARGING AC ADAPTOR  
A charging AC adaptor includes: a first diode bridge connected to an AC terminal; a chopper controller connected to the first diode bridge; an insulating air core transformer connected to the...
US20140334208 SYNCHRONOUS RECTIFICATION IN THE THREE-LEVEL INVERTER-CONVERTER TOPOLOGIES  
A power module for a three-level power inverter/converter that employs synchronous rectification for use in a uni-directional active rectifier mode to reduce static losses and enhance efficiency...
US20130286695 CONTROLLER FOR AN INVERTER CIRCUIT, INVERTER, AND METHOD FOR OPERATING AN INVERTER  
Damage to an inverter due to an excessively high start-up current, when using space vector control without a voltage sensor in conjunction with small connection inductances, can be prevented with a...
US20120092899 DYNAMIC CONVERTER TOPOLOGY  
Methods and apparatus of dynamic topology power converters are provided. One method includes monitoring at least one variable of the power converter and based on the at least one monitored...
US20140204641 SYSTEM FOR REGULATING THE OUTPUT OF A HIGH-VOLTAGE, HIGH-POWER, DC SUPPLY  
A system for regulating the output of a high-voltage, high-power DC supply, the system includes a high-voltage DC power supply, a storage capacitor, and at least one non-dissipative regulator...
US20140185334 SWITCHING POWER SUPPLY  
Aspects of the invention provide a switching power supply in which frequency reduction control in a light load condition both in a power factor correction converter and a DC-DC converter restrains...
US20130155742 MICRO-POWER RECTIFIER AND METHOD THEREOF  
A micro-power rectifier including a plurality of charge pumps and a method of the micro-power rectifier are provided. The charge pumps respectively include an input capacitor, an output capacitor,...
US20130016543 DC TO AC CONVERTER  
A DC to AC converter includes a first switch, a second switch, a first half bridge inverter, and a second half bridge inverter. The first switch includes a first terminal and a second terminal. The...
US20130322142 MULTILEVEL POWER CONVERTER  
An AC-DC power converter is provided. The power converter includes an electrical terminal including a positive node and a negative node. The power converter also includes a first switch coupled...
US20080239764 Forward power converter controllers  
This invention relates to control techniques and controllers for resonant discontinuous forward power converters (RDFCs). A method of controlling a resonant discontinuous forward converter (RDFC),...
US20140043861 CONTROLLING AN ADAPTER TRANSFORMER VOLTAGE  
An adapter for electrical power that includes a rectifier coupled to a transformer with a primary coil and a secondary coil. The secondary coil includes a first end tap, a second end tap, and a...
US20120224400 ELECTRICAL EQUIPMENT  
A television includes a power supply circuit including a transformer that converts input voltage to output voltage, an input voltage monitoring circuit that monitors the input voltage based on a...
US20140036549 Switching Power Converter Dynamic Load Detection  
A secondary-side dynamic load detection system and method rapidly identifies when a dynamic load has been placed on the output (e.g., when an electronic device is re-connected to the switching...
US20130058140 METHOD FOR LIMITING THE GENERATOR VOLTAGE OF A PHOTOVOLTAIC INSTALLATION IN CASE OF DANGER AND PHOTOVOLTAIC INSTALLATION  
An inverter operable to interface with a generator that has a number of partial strings includes an inverter bridge circuit configured to connect to the partial strings, and a control device...
US20120188805 POWER SUPPLY CONVERSION CIRCUIT OF MULTI-PHASE POWER SUPPLY  
A power supply conversion circuit includes a PWM chip and many sub-circuits. Each sub-circuit includes an inductor, a first capacitor connected to ground, a first resistor connected in series with...
US20140204617 POWER CONVERTER WITH CURRENT FEEDBACK LOOP  
In a power converter, a deviation calculator calculates, in each cycle, a deviation between a value of an input electrical parameter of a switch circuit and a target value selected by a selector in...
US20120218792 DIGITAL PHASE ADJUSTMENT FOR MULTI-PHASE POWER CONVERTERS  
A multiphase power converter includes one or both of a phase control circuit and a valley switching locking circuit. The phase control circuit measures a phase difference between a first phase...
US20130343102 SYNCHRONIZED ISOLATED AC-AC CONVERTER WITH VARIABLE REGULATED OUTPUT VOLTAGE  
In an AC-AC converter comprising a primary side, a secondary side and a regulator, wherein the regulator comprises a voltage regulation circuit configured to determine an error voltage based on an...
US20110007526 FREQUENCY LIMITATION METHOD WITH TIME HYSTERESIS USED IN QUASI-RESONANT CONTROL  
A frequency limitation method used in quasi-resonant control of a switching regulator is disclosed. The switching frequency is limited through setting a minimum time limit, such as a minimum...
US20080079400 GENERATOR WITH HIGH PHASE ORDER  
An apparatus for producing electrical power from mechanical power, includes a generator with a rotor and a stator for conversion of mechanical power to a polyphase alternating current having more...
US20130027981 HOLD-UP TIME EXTENSION CIRCUIT FOR A POWER CONVERTER  
A power system has a power converter adapted for converting a first input voltage at an input thereof to a first output voltage at an output thereof, and a hold-up time extension circuit comprising...
US20140063870 APPARATUS AND METHODS FOR RESTORING POWER CELL FUNCTIONALITY IN MULTI-CELL POWER SUPPLIES  
A method is provided for operating a multi-cell power supply that includes multiple series-connected power cells in each of multiple legs. Each power cell includes a bypass device that may be used...
US20120163048 INVERTER, POWER GENERATION SYSTEM AND METHOD OF OPERATING A POWER GENERATION SYSTEM  
The invention relates an inverter that may be set up as part of a power generation system for the connection of a number of substrings, which, using DC switches, can be connected to each other in...
US20120300525 CONVERTER ARRANGEMENT AND METHOD IN CONNECTION WITH CONVERTER ARRANGEMENT  
An exemplary converter arrangement and method in connection with the arrangement includes a converter arranged in a closed container or similar structure. The container has a high voltage...
US20140133190 ISOLATED SWITCH-MODE DC/DC CONVERTER WITH SINE WAVE TRANSFORMER VOLTAGES  
A converter includes a transformer including a primary winding and a secondary winding, a primary-side circuit connected to first and second input terminals and to the primary winding and including...
US20140192570 POWER GENERATION SYSTEM AND METHOD FOR OPERATING A POWER GENERATION SYSTEM  
According to an embodiment, a power generation system is provided comprising a power generator; a plurality of converter modules, each converter module having a DC link, wherein the DC link of each...
US20110122662 Buck and buck/boost converter systems having auxiliary circuits and method thereof  
The configurations of a buck type and a buck/boost type converter systems and a controlling method thereof are provided in the present invention. The proposed buck/boost type converter system...
US20140328096 ACTIVE POWER FACTOR CORRECTION CIRCUIT FOR A CONSTANT CURRENT POWER CONVERTER  
The present disclosure provides techniques for power factor correction on a constant current system. In an example embodiment, the present disclosure provides a power factor correction circuit...
US20120139435 Method for Controlling a Voltage Transformer for Overvoltage Protection, Voltage Transformer and Operating Device having a Voltage Transformer  
A method for controlling a voltage transformer for operating a switchable load having at least one inductance and a switch, which is activated by a digital control device. When the switch is...
US20130094263 POWER SUPPLY DEVICE  
A power supply device includes an input connector, an alternating current (AC)/direct current (DC) converter, a plurality of voltage converters, and a plurality of output connectors corresponding...
US20130279204 POWER SUPPLY SYSTEM, POWER CONVERTER AND VOLTAGE REGULATING METHOD  
A power converter includes a power module, a feedback module, and a control module. The power module is used for converting an input voltage into an output voltage. The feedback module is...
US20120146534 DC/AC Inverter  
A fluorescent lamp device includes a frequency generator for generating a pulse signal, a driver circuit coupled to said frequency generator for generating at least one driving signal according to...
US20140254221 CONSTANT POWER INVERTER WITH CREST FACTOR CONTROL  
An electrosurgical generator is provided. The generator includes a DC-DC buck converter configured to output a DC waveform, the DC-DC buck converter including at least one first switching element...
US20130215657 ACTIVE BRIDGE RECTIFICATION  
Technique for controlling a circuit that converts an AC input voltage into a DC output voltage using transistors arranged in first and second transistor pairs. Each transistor of the first pair is...
US20120229034 DRIVING CONTROLLER AND FULL-BRIDGE CONVERTING CIRCUIT  
The present invention provides a full-bridge driving controller and a full-bridge converting circuit, which have the function of soft switch, to provide a DC output voltage. The present invention...
US20140340944 METHOD PROVIDING SHORT-CIRCUIT PROTECTION AND FLYBACK CONVERTER UTILIZING THE SAME  
A method providing short-circuit protection and a flyback converter utilizing the same wire are disclosed. The a method, adopted by a flyback converter, includes a transformer, including generating...
US20130169051 UNINTERRUPTIBLE POWER SUPPLY  
An uninterruptible power supply (UPS) includes a rectifier, a buck converter, a solar energy module, a boost converter, a controller, and a power distribution unit (PDU). The solar energy module...
US20110051463 APPARATUS AND METHOD FOR STANDBY POWER REDUCTION OF A FLYBACK POWER CONVERTER  
An apparatus and method for a flyback power converter reduce the standby output voltage of the flyback power converter by switching the reference voltage provided by a shunt regulator of the...
US20090001909 AUTOMOTIVE POWER INVERTER WITH REDUCED CAPACITIVE COUPLING  
An automotive power inverter is provided. The power inverter includes a chassis, a microelectronic die coupled to the chassis and having an integrated circuit formed thereon, and an insulating...
US20140078785 ADAPTER POWER SUPPLY  
An adapter power supply of the invention comprises a switching element that performs switching of an input voltage obtained by rectifying an input AC voltage to deliver switched voltage to a...
US20140362613 LC SNUBBER CIRCUIT  
The present disclosure relates to an LC snubber circuit for a switching converter, wherein the switching converter includes an inductor and a switching device connected in series. The LC snubber...
US20140146571 PULSED POWER GENERATOR  
An active voltage drop control-type pulse power generator includes power stages, a power inverter, a power loop, a control inverter, a control loop, and a compensation unit. The power stages...
US20110198936 Circuit Arrangement Including a Multi-Level Converter  
Disclosed is a circuit arrangement including at least one multi-level-converter.
US20140268910 COUPLED INDUCTOR DC STEP DOWN CONVERTER  
A step down power converter include a switch, an inductor, a diode, a capacitor, and a winding magnetically coupled to the inductor. The diode, the inductor and the capacitor are coupled in series,...
US20090189393 MICRO WIND TURBINE TOPOLOGY FOR SMALL SCALE POWER GENERATION  
A wind energy converter has a generator adapted to be coupled directly to a wind turbine without need for a mechanical gear unit. A rectifier is coupled to the generator and a converter is coupled...
US20140029320 Power Conversion with Added Pseudo-Phase  
Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power...