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US20110292703 |
Single-stage AC-to-DC converter with isolation and power factor correction
A new class of Single-Stage AC-DC converters with built-in Isolation and PFC feature is introduced along with the companion hybrid switching conversion method. Several different converter...
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US20110080756 |
MODIFIED ZERO VOLTAGE TRANSITION (ZVT) FULL BRIDGE CONVERTER AND PHOTOVOLTAIC (PV) ARRAY USING THE SAME
The present invention, a modified zero voltage transition (ZVT) full bridge converter, is an isolated dc/dc converter which can operate with high efficiency and high reliability in applications...
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US20110101880 |
Driver circuit with an increased power factor
According to one exemplary embodiment, driver circuit coupled between an AC line and a load includes a first semiconductor switch interposed between a bus voltage and a resonant circuit and a...
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US20080165553 |
Eighteen pulse rectification scheme for use with variable frequency drives
An AC/DC converter system comprises an input circuit for connection to a three phase AC source. An isolation transformer comprises a set of primary windings and first and second sets of secondary...
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US20110075447 |
SINGLE STAGE POWER CONVERSION UNIT WITH CIRCUIT TO SMOOTH AND HOLDUP DC OUTPUT VOLTAGE
The Power Conversion Unit includes a single stage rectifier circuit that generates a DC voltage which is stored on a first capacitor. A circuit arrangement connected to the first capacitor monitors...
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US20130100717 |
DC-AC POWER CONVERTING APPARATUS AND SOLAR POWER SUPPLYING APPARATUS INCLUDING THE SAME
There is provided a DC-AC power converting apparatus that does not employ a capacitor for removing a ripple in an input terminal by charging or supplementing power according to a difference in...
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US20120092907 |
POWER SUPPLY AND SYSTEM
The invention provides a power supply comprising a switch, a voltage detector and an SPS stage. The switch is coupled to an AC source. The voltage detector detects a voltage of the AC source. The...
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US20100020577 |
PRODUCTION OF A REAL POWER EQUILIBRIUM OF THE PHASE MODULES OF A CONVERTER
A converter has at least one phase module, an AC voltage terminal and a DC voltage terminal. A phase module branch is formed between each DC voltage terminal and each AC voltage terminal. Each...
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US20120020122 |
LOSSLESS COMMUTATION DURING OPERATION OF A POWER CONVERTER
A method for operating a DC-DC converter. The method comprises: matching, based on a turns ratio of a transformer of the DC-DC converter, a primary side capacitance of the DC-DC converter and a...
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US20120099350 |
METHOD AND APPARATUS TO SELECT A PARAMETER/MODE BASED ON A MEASUREMENT DURING AN INITIALIZATION PERIOD
An integrated circuit includes a threshold detection circuit that is coupled to measure a signal from a first resistive external circuit coupled between a fourth external terminal of the integrated...
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US20130114312 |
System and Method for Power Conversion for Renewable Energy Sources
An energy conversion system for use with an alternative energy source is disclosed. The alternative energy source can generate either an AC or a DC voltage. A first power converter is connected...
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US20110234117 |
Solid State Device Controller
A solid state device controller is provided that includes a first electrical connector configured to be in electrical communication with an alternating current (AC) electrical power source and a...
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US20070086220 |
Circuit boards, power adapters and notebook computers for reducing EMI characteristics
A circuit board for reducing EMI characteristics and a power adapter and a notebook computer having the circuit board are disclosed. The circuit board includes: a base board; an upper-site...
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US20120250363 |
Interleaved Power Converter and Controller Therefor
Disclosed is an interleaved power converter for converting a DC voltage source into a DC voltage output.
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US20120069606 |
VERY HIGH FREQUENCY SWITCHING CELL-BASED POWER CONVERTER
In an aspect, the present invention provides a high frequency switching power converter. The high frequency switching power converter may include a plurality of soft-switchable power cells flexibly...
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US20100296323 |
Integrated device with AC to DC conversion function and integrated circuit using same
The present invention discloses an integrated device with AC to DC conversion function, and an integrated circuit using the device. The integrated circuit comprises: a circuit operating under low...
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US20130069582 |
PUSH-PULL CIRCUIT, DC/DC CONVERTER, SOLAR CHARGING SYSTEM, AND MOVABLE BODY
A push-pull circuit comprising: a push-pull first switching element and second switching element; a first rectifier element; a third switching element for switching a pathway between conductance...
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US20110317454 |
DUAL SWITCHES FLYBACK POWER CONVERTER WITH WIDE INPUT VOLTAGE RANGE
A dual switches Flyback power converter with a wide input voltage range according to the present invention comprises an input diode and an energy-store capacitor. The input diode can prevent the...
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US20130044522 |
LOW WEIGHT 3-PHASE 5-OUTPUT WIRE POWER CONVERSION SYSTEM FOR MICRO-GRID
A power conversion system eliminates output transformers and replaces them with a zig-zag transformer and a filter that provides a 3-phase 5-wire system with significantly reduced weight and size...
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US20110182089 |
Controller for a Power Converter and Method of Operating the Same
A controller for a power converter and method of operating the same. In one embodiment, the controller includes a primary peak current circuit configured to produce a reference voltage...
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US20110063883 |
INVERTER CONTROL CIRCUIT AND INTERCONNECTION INVERTER SYSTEM HAVING THAT INVERTER CONTROL CIRCUIT
An inverter control circuit (6) controls the operation of a plurality of switching elements in a three-phase inverter circuit (2) by a PWM signal. A phase voltage output from the three-phase...
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US20090161389 |
SYSTEMS AND METHODS FOR PRECHARGING BOOST CONVERTERS IN DC TO DC POWER CONVERTERS
A method and apparatus for precharging a DC to DC power converter system is provided. The system includes a boost circuit for generating a boosted output voltage from an input voltage. The input...
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US20130094264 |
STATIC VAR COMPENSATOR WITH MULTILEVEL CONVERTER
A static synchronous compensator for use in reactive power compensation, the static synchronous compensator comprising at least one primary compensator limb including first and second DC terminals,...
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US20100027297 |
Step-Up Converter Systems and Methods
Methods and systems with a step-up converter are provided based on a boost converter. In one aspect, a step-up converter includes: a boost converter having a first inductor; a second inductor...
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US20120243273 |
MULTI-LEVEL, MULTI-VOLTAGE MATRIX CONVERTER CIRCUIT AND METHOD FOR IMPLEMENTING SUCH A CIRCUIT
A matrix converter circuit with n symmetrical levels per phase including n conversion arms respectively supplied with n intermediate symmetrical voltage levels and connected at the output thereof...
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US20080094121 |
INVERTER DRIVING CIRCUIT AND INVERTER CONTROL CIRCUIT
A phase adjusting circuit is provided that is capable of adjusting a delay time at a rise or fall of a driving signal for driving an inverter. A phase adjusting circuit is provided upstream of a...
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US20080316781 |
BUCK CONVERTER LED DRIVER CIRCUIT
A buck converter LED driver circuit is provided. The driver circuit includes a buck power stage, a rectified AC voltage source, a voltage waveform sampler, and a control circuit. The buck power...
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US20110149626 |
BIDIRECTIONAL INVERTER FOR NEW RENEWABLE ENERGY STORAGE SYSTEM
A bidirectional inverter is provided for a renewable energy storage system which may simplify the circuitry and lower manufacturing cost by reducing the numbers of switches and control signals. The...
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US20110199802 |
SINGLE ENDED POWER CONVERTERS OPERATING OVER 50% DUTY CYCLE
This invention discloses apparatus and methods for increasing the duty cycle of the single ended power converters surpass 50 percent limitation by adding active switch-capacitor network to the...
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US20070211500 |
DC-DC converter with direct driven synchronous rectifier
A DC-DC converter with a direct driven synchronous rectifier is disclosed, comprising: a DC-AC converter receiving a DC voltage; a transformer having one primary winding coupled to the DC-AC...
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US20050013148 |
Universal power supply system
A universal power supply system is used for at least one electric consumer. The supply system comprises at least one AC source and a cable connection connecting said AC source to said electric...
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US20120092908 |
Multi-Level Parallel Power Converters
Multi-level power converters are disclosed. In one embodiment, a multi-level power converter includes an input for receiving an input voltage and a converter output for providing a variable output...
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US20100142234 |
Partial regeneration in a multi-level power inverter
In one embodiment, the present invention includes a medium voltage drive system having multiple power cells each to couple between a transformer and a load. A first subset of the power cells are...
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US20080170421 |
Malfunction Determining Device For Drive Circuit and Drive Unit Including the Same, and Method For Determining Malfunction in Drive Circuit
A device and method for determining whether a malfunction is present in a drive circuit, which drives an electric device that generates counter-electromotive force, when all gates in the switching...
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US20120275195 |
Low Noise, Highly Isolated Power Supply
A power supply may include a power transformer having a primary winding and a secondary winding, one end of the secondary winding connected to ground, and a shielded isolation transformer having a...
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US20110204713 |
DC/DC CONVERTER
A DC/DC converter for providing an output voltage includes: a connected DC voltage transformer; a supply voltage input for providing a first supply potential and a second supply potential to the DC...
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US20110122664 |
POWER FACTOR CORRECTION TYPE SWITCHING POWER SUPPLY UNIT
A soft-stop overvoltage protection circuit, into which a soft-stop overvoltage detection voltage proportional to a direct current output voltage is input, reduces the output of a multiplier in...
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US20100265740 |
IMPROVED SELF POWERED SUPPLY FOR POWER CONVERTER SWITCH DRIVER
Self-powered supplies with on-board diagnostics are presented for powering a power converter switch driver with power obtained from an associated snubber circuit, including a first converter stage...
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US20110103114 |
SOLAR POWER CONVERSION CIRCUIT AND POWER SUPPLY SYSTEM USING THE SAME
A solar power supply system includes at least one solar power conversion circuit and an inverter circuit. Each solar power conversion circuit comprises a solar module and a direct current (DC)...
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US20100315843 |
METHOD OF DETECTION FOR OUTPUT SHORT CIRCUIT OF A FLYBACK POWER SUPPLY
Disclosed are methods of detection for output short circuit of a flyback power supply, which detect the current sense signal provided by a current sense resistor serially connected to a power...
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US20110013434 |
POWER CONVERTER WITH EXTREMELY LOW STANDBY POWER CONSUMPTION
The present invention relates to a power converter with extremely low standby power consumption. The power converter comprises a rectification module having at least one unilateral switch which has...
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US20120250373 |
GRID TIED INVERTER, SYSTEM AND METHOD
A grid tied inverter connectable to an electricity grid having a DC to DC current fed push-pull inverter to generate a current waveform from a DC voltage source. The push-pull inverter includes a...
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US20080253155 |
Power Supply with Current Limiting Circuits
A power supply (200) is provided having a plurality of independent current limiting circuits. A first current limiting circuit (6) provides protection against a short circuit or other extraneous...
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US20120236611 |
POWER LINE CURRENT FED POWER SUPPLIES PRODUCING STABLE LOAD CURRENTS AND RELATED METHODS
Power line current fed power supplies producing stable load currents and related methods are described. The power supplies may include a current transformer coupled to an inductive network. In some...
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US20120140528 |
FORWARD CONVERTER TRANSFORMER SATURATION PREVENTION
A power converter in one aspect limits the magnetic flux in a transformer. A control circuit included in the power converter includes a pulse width modulator, a logic circuit and a saturation...
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US20110194310 |
FORWARD CONVERTER TRANSFORMER SATURATION PREVENTION
A power converter in one aspect limits the magnetic flux in a transformer. A control circuit included in the power converter includes a pulse width modulator, logic circuits and saturation...
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US20110310642 |
LOW COST CURRENT SOURCE CONVERTERS FOR POWER GENERATION APPLICATION
A system comprising low cost topology for power converter systems is provided. The system takes advantage of the voltage-boost characteristic of a current source inverter (CSI) and utilizes a PWM...
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US20120113699 |
Converter
A voltage source converter for use in high voltage DC power transmission and reactive power compensation. The voltage source converter comprises at least one converter limb including first and...
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US20120106211 |
POWER FACTOR AND LINE DISTORTION METHOD AND APPARATUS
Today, power distribution systems can be used to supply power to many loads, and since many loads, such as servers, are reactive (i.e., have capacitors and/or inductors), line distortion and power...
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US20110075462 |
Bridgeless Boost PFC Circuits and Systems
Bridgeless boost PFC circuits and systems providing an improved method of current sensing using two current sensing resistors is envisaged. Analog switches are provided to select one of the two...
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