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US20110222319 SWITCHING POWER SUPPLY  
A switching power supply includes a first auxiliary power supply for causing a first auxiliary winding of a transformer to induce voltage by ON/OFF control of a switching element connected to a...
US20140015326 GRID-CONNECTED INVERTER, INVERTER ARRANGEMENT AND METHOD FOR OPERATING AN INVERTER ARRANGEMENT  
A grid-connected inverter for feeding current via a transformer into an electric power grid includes an output bridge arrangement that is actuated via a pulse width modulator, wherein a periodic...
US20140104911 CIRCUIT FOR SYNCHRONOUSLY SWITCHING SERIES CONNECTED ELECTRONIC SWITCHES  
A circuit includes first and second electronic switches, first and second excitation circuits, and first and second inductors. The first and second electronic switches are electrically coupled in...
US20110273909 FULL-BRIDGE PHASE-SHIFT CONVERTER WITH AUXILIARY ZERO-VOLTAGE-SWITCHING CIRCUIT  
A full-bridge phase-shift converter with an auxiliary zero-voltage-switching circuit includes a full-bridge switching circuit, an isolated transformer, an auxiliary zero-voltage-switching (ZVS)...
US20130169176 NON-ISOLATED AC/DC CONVERTER WITH POWER FACTOR CORRECTION  
A non-isolated AC/DC converter having power factor correction, comprising an active switch connected to a waveform controller for control, and sequentially showing conduction, cut off, making the...
US20120250376 SOFT STARTER FOR PHASE-SHIFTING AUTOTRANSFORMER AC-DC POWER CONVERTER  
An AC-DC power converter has a phase-shifting autotransformer based rectifiers and DC capacitors. Soft start of the AC-DC power converter is achieved by designing the autotransformer to operate at...
US20130148383 DC-AC CONVERTER AND CONVERSION CIRCUIT  
A DC-AC converter is provided. The DC-AC converter includes a time-varying DC power generating circuit, an AC power generating circuit and a transmission capacitor. The time-varying DC power...
US20100008119 SOLAR POWER GENERATION STABILIZATION SYSTEM AND METHOD  
A power generation system including a photovoltaic (PV) module to generate DC power is provided. The system includes a combination of a DC to DC converter and a DC to AC converter coupled to the DC...
US20130155735 STACKED VOLTAGE SOURCE INVERTER WITH SEPARATE DC SOURCES  
A stacked voltage source inverter having separate DC sources is described herein. This inverter is applicable to low or medium voltage, low to medium power applications such as photovoltaic utility...
US20120120689 FAULT TOLERANT DC POWER SYSTEMS  
A fault tolerant DC power system includes a permanent magnet generator (PMG), a first contactor in electrical communication with the PMG, an active rectifier in electrical communication with the...
US20080310205 Method for Controlling a Polyphase Converter With Distributed Energy Stores  
The invention relates to a method for controlling a power converter comprising at least two phase modules, each of which is provided with an upper and a lower valve leg that is equipped with at...
US20130176753 Three Phase Active Rectifier System  
A voltage source inverter comprises a rectifier converting AC power to DC power at an output. An inverter receives DC power and converts the DC power to AC power. A link circuit is connected...
US20130336028 ELECTRIC-POWER CONVERSION SYSTEM  
The number of constituent components is reduced so as to provide a small-size and inexpensive electric-power conversion system. The electric-power conversion system is provided with an inverter...
US20130336013 DC-to-DC Converter and Method for Operating a DC-to-DC Converter  
The disclosure relates to a method for operating a DC-to-DC converter with two bridge arrangements with bridge switches, of which at least one is in the form of a switchable bridge arrangement...
US20120218795 PULSE WIDTH MODULATED CONTROL FOR HYBRID INVERTERS  
A single-phase hybrid multilevel inverter is described that combines a 3-level leg and a 2-level leg to reduce the number of overall switching devices for a 5-level inverter. The 2-level inverter...
US20120075895 Universal-Voltage Discrete Input Circuit  
A universal-voltage discrete input circuit uses a high voltage depletion-mode field effect transistor in combination with a low-voltage, adjustable precision shunt regulator and an isolation...
US20130051094 CASCADED FLYING CAPACITOR MODULAR HIGH VOLTAGE INVERTERS  
A high voltage inverter is provided which includes a plurality of k-level flying capacitor H bridge modules, k being greater than 2, each having a positive dc terminal, a negative dc terminal, and...
US20130170253 AUXILIARY POWER GENERATION CIRCUIT  
An auxiliary power generation circuit adopted for use on a filter power circuit includes a first voltage stabilization capacitor and a second voltage stabilization capacitor connecting to the first...
US20130135904 CONVERTER CIRCUIT  
A converter circuit includes a transformer having primary windings and at least one secondary winding, a rectifier circuit connected to the secondary winding, and oscillating circuits connected to...
US20110235368 SYSTEM AND METHOD FOR CONVERSION OF HIGH VOLTAGE AC TO LOW VOLTAGE DC USING INPUT VOLTAGE GATING  
A method and apparatus for conversion of high voltage AC to low voltage high current DC without using high voltage capacitors or transformers. A single switch is used to perform both the functions...
US20130250621 HIGH EFFICIENCY AC/DC 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...
US20110051479 Systems and Methods for Controlling Phases of Multiphase Voltage Regulators  
A multi-phase voltage regulator is disclosed. The multi-phase voltage regulator includes a voltage regulator controller. Phase output stages are coupled to the voltage regulator controller. The...
US20110058396 FLYBACK-TYPE INVERTER CIRCUIT FOR NETWORK SUPPLY OR FOR NETWORK-INDEPENDENT OPERATION  
An inverter circuit for supplying solar power or wind power to a network or for network-independent operation. The inverter circuit includes a minimum number of components and can therefore be kept...
US20110013431 SWITCHING POWER CONVERSION CIRCUIT AND POWER SYPPLY USING SAME  
A switching power conversion circuit receives an input voltage and generates an output voltage to a system circuit. The switching power conversion circuit includes a power circuit, a feedback...
US20080186749 Ac/Dc Conveter for Aeronautics  
The invention relates to the electrical power supply of aircraft and notably of large commercial aircraft. According to the invention, the aircraft is equipped with an AC-DC converter that...
US20120320638 RESONANT CIRCUIT AND RESONANT DC/DC CONVERTER  
The present disclosure relates to a resonant circuit (20). The resonant circuit comprises three resonant circuit input nodes (11, 12, 13) and three resonant circuit output nodes (21, 22, 23), a...
US20110157930 POWER INPUT STABILIZING CIRCUIT  
The power input stabilizing circuit provides a first resistor at the input terminals to suppress impulse current. Then, the power passes through a power input limiting circuit including a...
US20110222327 Photovoltaic Inverter Power System  
A photovoltaic system may include a DC to AC inverter including a minimum operating power setting and a microprocessor for calculating a maximum available power output for a photovoltaic array.
US20100208501 POWER TRANSFER MANAGEMENT FOR LOCAL POWER SOURCES OF A GRID-TIED LOAD  
A power transfer system provides power factor conditioning of the generated power. Power is received from a local power source, converted to usable AC power, and the power factor is conditioned to...
US20130294126 Photovoltaic Power Conditioning Units  
We describe a photovoltaic (PV) panel system comprising a PV panel with multiple sub-strings of connected solar cells in combination with a power conditioning unit (microinverter). The power...
US20120081934 PHOTOVOLTAIC POWER CONDITIONING UNITS  
We describe a photovoltaic (PV) panel system comprising a PV panel with multiple sub-strings of connected solar cells in combination with a power conditioning unit (microinverter). The power...
US20140078783 FULL-BRIDGE QUASI RESONANT DC-DC CONVERTER AND DRIVING METHOD THEREOF  
A full-bridge quasi-resonant DC-DC converter is provided, including a transformer having a primary winding and a secondary winding, a full-bridge converting circuit electrically connected with the...
US20120106222 METHOD OF OPERATING AN INVERTER BY TURNING OFF THE SWITCHING AROUND A ZERO TRANSITION OF THE ALTERNATING OUTPUT CURRENT  
A method of operating an inverter for converting direct voltage into alternating voltage. The inverter has direct-voltage terminals and alternating-voltage terminals and a plurality of power...
US20140049993 POWER FACTOR CORRECTION  
A power factor correction circuit includes an inductor L1, a diode D1, a switch Q3 and a controller 24. An input voltage Vin is applied to the inductor L1 which is cyclically discharged through the...
US20130201725 RESONANT CIRCUIT AND RESONANT DC/DC CONVERTER  
The present disclsure relates to a resonant circuit (20). The resonant circuit is comprises three resonant circuit input nodes (11, 12, 13) and three resonant circuit output nodes (21, 22, 23), a...
US20110216557 INVERTER CIRCUIT  
This inverter circuit includes first and second switching elements and an output transformer which is provided with a first primary winding connected in series between said first and second...
US20120002452 Compact inverter  
A method of making a compact power inverter is disclosed. Steps include: providing a plurality of transistors, a main circuit board, a transformer, an input control circuit board; an output control...
US20130201736 SOLAR INVERTER SYSTEM AND CONTROL METHOD THEREOF  
A solar inverter system includes a first inverter, a second inverter, and a controller. The first inverter has a first input terminal, and a first output terminal. The first input terminal is...
US20130100708 POWER FACTOR IMPROVEMENT CIRCUIT  
A power factor improvement circuit includes a low frequency filter unit installed between two electrodes of an output terminal of a rectifier unit for adjusting voltage and current inputted to a...
US20110103118 NON-ISOLATED DC-DC CONVERTER ASSEMBLY  
A non-isolated DC-DC converter assembly includes a boost converter and a ─ćuk converter connected together in a specific way. The non-isolated DC-DC converter assembly allows for grounding of a ...
US20130077362 POWER FACTOR CORRECTION (PFC) CIRCUIT CONFIGURED TO CONTROL HIGH PULSE LOAD CURRENT AND INRUSH CURRENT  
A power circuit for protecting against high pulse load current and inrush current is disclosed. The power circuit comprises a buck-boost module and a PFC controller operatively coupled with the...
US20130033211 SWITCHING-MODE POWER SUPPLIES AND CONTROL METHODS THEREOF  
Disclosed include switching-mode power supplies and control methods thereof. A disclosed switching-mode power supply is coupled to an input power node and a ground node, comprising a controller, a...
US20110188276 CIRCUIT ARRANGEMENT HAVING A BOOST CONVERTER, AND INVERTER CIRCUIT HAVING SUCH A CIRCUIT ARRANGEMENT  
An inverter circuit contains a first and second DC sources for providing a DC voltage, a common boost converter for boosting the DC voltage, an intermediate circuit capacitor connected between the...
US20130010505 METHOD FOR CONTROLLING A POWER CONVERTER IN A WIND TURBINE GENERATOR  
A method for controlling a power converter in a wind turbine generator, the power converter being connected to a power grid, the method comprising obtaining an alternating current (AC) line voltage...
US20060098466 Demagnetization circuit for using in push-pull circuit  
A demagnetization circuit that is used in a push-pull circuit, when the positive-half-period circuit is on and the negative-half-period circuit is off, a pulse width modulation signal (Vga) at...
US20130176762 Three Level Inverter Modulation  
An apparatus, system, and method for providing three level inverter modulation. In one embodiment, control signals can be provided to control a three level inverter in a power converter based on at...
US20110211379 POWER CONVERTER WITH REVERSE RECOVERY AVOIDANCE  
A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first...
US20070296363 Rectifier and System for Controlling the Speed of an Electric Motor  
The invention concerns a reversible current rectifier, for connection to part of a polyphase network and to a continuous bus comprising a plurality of rectifier cells each rectifier cell including...
US20100328978 VARIABLE FREQUENCY TRANSFORMER HAVING MULTIPLE HORIZONTAL ROTARY TRANSFORMERS WITH COMMON CONTROLS AND VOLTAGE INFRASTRUCTURE AND METHOD  
A variable frequency transformer including: a first parallel circuit including at least two of the rotary transformers arranged in parallel and having an isolating circuit breaker connected to a...
US20130307340 POWER CONVERTER OPERABLE FROM VARIOUS POWER SOURCES  
A power converter and method of operating the same for use in a power conversion system capable of receiving power from various sources, including renewable sources, for application to a load....