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US20100085786 CONVERTIBLE CHARGE-PUMP CIRCUIT  
A convertible charge-pump circuit includes: a charging circuit having a plurality of charging capacitors and a pumping circuit having an output port coupled to a pumping capacitor. The charging...
US20130235621 REGULATION FOR POWER SUPPLY MODE TRANSITION TO LOW-LOAD OPERATION  
A switching power converter includes a controller configured to transition from a first operating mode to a second operating mode by determining the operating conditions at the transition point...
US20080175024 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...
US20110216567 Single switch inverter  
A novel concept of converting a DC input to an AC output with a single active switch is disclosed. A series of topologies are developed to support the needs of different applications. Particular...
US20130279216 COMPENSATING RIPPLE ON PULSE WITH MODULATOR OUTPUTS  
A ripple compensation apparatus comprises a ripple detection unit to detect a ripple on a dual DC bus, a waveform generation unit to generate a modulated waveform based on a base waveform and the...
US20120262955 CONVERTER WITH INPUT VOLTAGE BALANCE CIRCUIT  
In one aspect of the present invention, a converter circuit with input voltage balance includes a plurality of modules having inputs electrically series-connected to each other and outputs...
US20120256685 Power Supply with Tickle Pulse Injection  
A power supply injects a series of “tickle” pulses into a pulse width modulated (PWM) controller to induce the controller to generate PWM pulses at a minimum switching frequency, preferably one tha...
US20120175955 SMART MICROGRID RECONFIGURABLE AC INTERFACE  
Presented is a system and method for providing reconfigurable AC interfaces for AC power systems. The method comprises embedding a reconfigurable AC interface for transferring power between power...
US20120039095 BOOST CONVERTER  
There is provided a boost converter capable of reducing internal pressure in elements without the employment of a separate snubber by clamping a voltage, transmitted to the elements, to a charging...
US20050237010 Architecture of power supply system for LCD apparatus  
The proposed architecture includes a Dual Boost PFC circuit for receiving the AC input voltage and generating the DC bus voltage, at least one inverter coupled to the Dual Boost PFC circuit for...
US20120020463 COMPACT, LOW NOISE POWER SUPPLY FOR ADVANCED ELECTRONICS APPLICATIONS, AND X-RAY ANALYZER APPLICATIONS THEREOF  
A shielded, low-noise, high-voltage power supply having a plurality of voltage multipliers, each having a toroidal transformer, and collectively producing a high DC output voltage from an AC...
US20100054001 AC/DC Converter with Power Factor Correction  
A power converter is configured for usage in a power factor correction system. The power converter comprises a transformer with a primary winding and a secondary winding which isolates a primary...
US20090080228 INDUSTRIAL TRUCK WITH A CHARGER  
Industrial truck with a charger, an asynchronous machine and a three-phase AC control unit which converts a DC voltage of a battery for the asynchronous machine, the charger having a switching...
US20130170257 COMPOSITE AC-TO-DC POWER CONVERTER USING WYE ARCHITECTURE  
A composite power conversion method using a WYE asymmetrical autotransformer that converts electrical power from AC to DC uses two or more conversion methods in parallel and provides a passive...
US20130272034 METHOD OF FORMING A LOW POWER DISSIPATION REGULATOR AND STRUCTURE THEREFOR  
In one embodiment, a method of forming a conditioning circuit includes configuring an output biasing network to provide a biasing voltage to an MOS transistor to enable the MOS transistor to...
US20140104891 DC-DC CONVERTER  
Disclosed is a DC-DC converter. The DC-DC converter includes a power input unit to which power is applied, a first module comprising a first transformer and a second transformer to output a first...
US20140146579 TRANSISTOR GATE DRIVER WITH CHARGE PUMP CIRCUIT FOR OFFLINE POWER CONVERTERS  
A controller of the power converter according to the present invention comprises a gate driver. The gate driver generates a gate-drive signal. The gate-drive signal is coupled to drive a power...
US20140085940 Power System Switch Protection Using Output Driver Regulation  
A controller of a switching power converter includes a voltage protection circuit that generates a modified supply voltage that does not exceed a predetermined threshold voltage to power one or...
US20130194831 RESONANT CONVERTER WITH AUXILIARY RESONANT COMPONENTS AND HOLDUP TIME CONTROL CIRCUITRY  
A resonant power converter is provided with auxiliary circuit branches and control circuitry for switchably coupling the auxiliary branches to resonant circuit components during holdup times....
US20110103102 VOLTAGE CONVERTER WITH HIGH EFFICIENCY  
A voltage converter transmits energy in multiple stages using a charge pump so as to decrease the voltage rating of the secondary side of the transformer and reduce the size of the transformer....
US20110122655 POWER SUPPLY WITH AC/DC CONVERTER AND DC/AC INVERTER IN LOOP  
A power supply includes a DC/AC inverter and an AC/DC converter connected in a loop such that a DC output of the AC/DC converter is connected to a DC input of the DC/AC inverter and an AC output of...
US20080198635 Pulse width modulated ground/return for powered device  
A new pulse width modulation return scheme in which the source of PWM FET is directly connected to the 48 Volt return and therefore Ids of PWM FET does not pass through the hot-swap FET which...
US20130076151 PHOTOVOLTAIC GENERATION SYSTEM USING PARALLEL INVERTER CONNECTED GRID  
A photovoltaic generation system using grid-connected parallel inverters comprises a plurality of photovoltaic generation devices connected in parallel with each other, and a transformer configured...
US20130182471 OVERVOLTAGE PROTECTION CIRCUIT FOR AT LEAST ONE BRANCH OF A HALF-BRIDGE, INVERTER, DC/DC VOLTAGE CONVERTER AND CIRCUIT ARRANGEMENT FOR OPERATING AN ELECTRICAL MACHINE  
An overvoltage protection circuit is provided for at least one branch of a half-bridge which includes a controllable semiconductor switch element and a free-wheeling diode connected in series and...
US20140009969 CURRENT SOURCE INVERTER AND METHOD FOR CONTROLLING CURRENT SOURCE INVERTER  
In controlling switching elements of a current source inverter, a switching loss in the switching element is prevented according to a normal switching operation for a commutation operation, without...
US20110141773 HVDC CONNECTION OF WIND TURBINE  
A method and apparatus for connection of a wind driven turbine generator to an HVDC transmission line is provided that does not require transformation of the wind generated AC voltage to a nominal...
US20140140102 DRIVE TRANSFORMER ISOLATION ADAPTIVE DRIVE CIRCUIT  
A drive transformer isolated-adaptive drive-circuit includes a power supply, a first MOSFET and a second MOSFET, the drain electrode of the first MOSFET coupled with the positive electrode of the...
US20120327691 SWITCHED MODE POWER SUPPLY  
A power supply has over power protection based on the same signal as used by the feedback path for controlling the switching of the power supply. This means that no additional signal needs to be...
US20140112024 HIGH VOLTAGE SWITCHING LINEAR AMPLIFIER AND METHOD THEREFOR  
A switching linear amplifier has a DC-DC converter to increase a low input DC voltage to a first high voltage DC. A high voltage high frequency inverter is coupled to the DC-DC converter to...
US20080304293 Converter controller  
A converter controller is disclosed. In one embodiment, a controller for a flyback converter includes a converter and a flyback controller. The converter is coupled to the flyback converter for...
US20120092912 COMMUTATION METHOD OF AN ELECTRONIC POWER CONVERTER PHASE WITH REVERSE-CONDUCTING IGBTS  
The invention relates to a method for commutating from a reverse-conducting IGBT (T1) operated in the diode mode to a reverse-conducting IGBT (T2) operated in the IGBT mode. According to the...
US20100165684 POWER ADAPTER  
A power adapter to receive at least one AC input power and transform to DC primary output power includes a power factor correction circuit to receive the AC input power and modulate to become a...
US20110267863 TRANSFORMERLESS INVERTER COMPRISING A DC/DC CONVERTER  
A transformerless inverter that serves to feed electricity from a DC current source into an AC power grid, has an inverter bridge and a DC/DC converter connected upstream of the inverter bridge....
US20130207583 VOLTAGE OUTPUT CIRCUIT, LOAD DRIVE CIRCUIT, AND METHOD FOR OUTPUTTING VOLTAGE  
A voltage output circuit includes: an oscillator circuit configured to output an oscillation signal while changing an oscillation frequency thereof; and a voltage generating circuit configured to...
US20070183177 Traction converter having a line-side four-quadrant controller, and method therefor  
A traction current converter includes a line-side four-quadrant converter which is provided with turn-off power semiconductors that are implemented as current converter valves. Each of the power...
US20130314957 HIGH VOLTAGE HIGH POWER MULTI-LEVEL DRIVE STRUCTURE  
A high voltage, high power multi-level drive structure includes a plurality of neutral-point-piloted (NPP) converter cells stacked together. At least one clamping diode is connected to one or many...
US20120268976 THREE-PHASE RECTIFIER CIRCUIT  
In one aspect of the invention, a three-phase rectifier circuit having three input terminals and two output terminals includes a three-phase diode bridge, three switching circuits, and a voltage...
US20110103099 SWITCHING CONTROL METHOD OF TRANSFORMER COUPLED BOOSTER  
Provided is a switching control method of a transformer coupled booster to suppress an increase in energizing current in a transformer of the transformer coupled booster and downsize the...
US20120212983 METHOD FOR CONVERTING POWER FOR A HIGH-VOLTAGE DIRECT VOLTAGE CONNECTION  
A method for converting a multi-phase alternating voltage into a high-voltage direct voltage and then into a second multi-phase alternating voltage. The method utilizes first and second cascades of...
US20060013024 Rectifier circuit having a power factor correction  
A rectifier circuit having a power factor correction and providing a DC output is disclosed. AC power having an AC oscillation is supplied at two or more AC inputs. The rectifier circuit includes...
US20120170325 High Efficiency Solar Wind Inverter With Hybrid DCDC Converter  
The present invention is a new design topology for solar/wind inverters using a new hybrid DC/DC converter design. This hybrid converter topology eliminates a difficult design compromise between...
US20140063871 POWER DELIVERY SYSTEMS AND METHODS FOR OFFSHORE APPLICATIONS  
A system for delivering power to an offshore load is disclosed. The system may include an on-land source of three-phase power, an on-land AC-to-DC power conversion module, a DC transmission line,...
US20130301307 RESONANT POWER CONVERTER  
A resonant power converter includes a resonance tank formed by a capacitance component and an inductance component, at least two switches connected to the resonance tank and a voltages source in a...
US20140185331 ACTIVE FORWARD MODE RECTIFIER  
A power converter includes a transformer having a primary winding and a secondary winding, a primary side circuit coupled to the primary winding, and a secondary side circuit coupled to the...
US20120014146 POWER-DEPENDANT MAINS UNDER-VOLTAGE PROTECTION  
A method and controller for power dependant mains under-voltage (“brown-out”) protection is disclosed. Brown-out protection is meant for protection against overheating due to low mains voltage and...
US20110228566 Series resonant converter with overload delay and short-circuit protection mechanisms  
The present invention is to provide a series resonant converter with an overload delay and short-circuit protection mechanism, which includes a voltage sensing circuit for sensing a voltage ripple...
US20120281441 CIRCUIT FOR CONVERTING A DIRECT CURRENT VOLTAGE TO AN ALTERNATING CURRENT VOLTAGE  
A circuit for converting a direct current voltage into an alternating current voltage includes a buck converter, a resonant DC voltage/DC voltage converter, a DC voltage/AC voltage inverter, and a...
US20130229837 INVERTER AND ACTIVE POWER FILTER SYSTEM  
An inverter and an active power filter system have been disclosed in the invention, so that the application range of the inverter under the occasions of different capacitor requirement can be...
US20140169050 BLANKING CONTROL CIRCUIT FOR CONTROLLING SYNCHRONOUS RECTIFIER AND METHOD OF CONTROLLING SYNCHRONOUS RECTIFIER USING THE CIRCUIT  
Disclosed herein are a blanking control circuit for controlling a synchronous rectifier and a method of controlling the synchronous rectifier by using the blanking control circuit. The blanking...
US20110080758 PLANT FOR TRANSMITTING ELECTRIC POWER  
A plant for transmitting electric power comprises a direct voltage network for High Voltage Direct Current and at least one alternating voltage network connected thereto through a station. The...