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US20110149618 Current Waveform Construction to Generate AC Power with Low Harmonic Distortion from Localized Energy Sources  
Methods and apparatus to provide low harmonic distortion AC power for distribution by converting energy from natural or renewable sources into electrical form, and constructing a current waveform...
US20110103107 RESONANCE CIRCUIT FOR DC-LINK VOLTAGE CONTROL IN DC-TO-AC INVERTER  
The present disclosure relates to a resonance circuit for DC-link voltage control in a DC-to-AC inverter. The resonance circuit comprises two active switches. Before the active switches of the...
US20150070948 VIRTUAL OSCILLATOR CONTROL OF POWER ELECTRONICS INVERTERS  
A system includes power electronics inverters connected in a network. The power electronics inverters can utilize measurements at local terminals, without a need to exchange information between...
US20140218980 Electrical Generator  
An inverter circuit comprises an inverter which can be configurable for controlling the supply of mains current from a grid to an electric machine in a start-up mode whereby the machine drives the...
US20130027994 Method and system for damping subsynchronous resonant oscillations in a power system using a wind turbine  
A wind turbine controlled to damp subsynchronous resonance oscillations on a grid is provided. The wind turbine includes rotor blades for turning by the wind, an electric generator rotatably...
US20110170322 POWER CONVERSION DEVICE  
A power conversion device includes an inverter for converting DC power to AC power to supply the AC power to a load, a converter for converting AC power from an AC power supply to DC power to...
US20120275201 GRID-TIE INVERTER  
According to one embodiment, a grid-tie inverter includes: a inverter performing pulse width modulation for a DC voltage; a first capacitor circuit connected to an input side of the inverter so as...
US20130229836 MULTIPLE INVERTER AND ACTIVE POWER FILTER SYSTEM  
A multiple inverter and an active power filter system are disclosed in the invention, said multiple inverter can decrease the volume and harmonics, increase the efficiency and decrease the cost,...
US20120229055 POWER CONVERTER AND POWER CONVERTER OF ROLLING STOCK  
A power converter includes a first electric power conversion unit having an inverter for converting a first DC electric power to an AC electric power, an AC circuit connected to the first electric...
US20140307489 CONTROL METHOD FOR INVERTER DEVICE, AND INVERTER DEVICE  
An inverter device (1), including a first inverter (10), and a second inverter (20) connected in parallel to the first inverter. Both the first and second inverters (10, 20) are three-level...
US20130070490 Grid-Connected Inverter and Method for Filtering AC Output Thereof  
Disclosed is a grid-connected inverter and a method for filtering AC output thereof. The grid-connected inverter comprises an AC output filter which includes two or more switchable filtering...
US20140268931 POWER CONVERSION SYSTEM WITH A DC TO DC BOOST CONVERTER  
A voltage booster allowing for increased utilization of low voltage, high current, unregulated DC power (“LVDC source”), such as, but not limited to, fuel cells, batteries, solar cells, wind...
US20150263599 POWER CONVERSION SYSTEM FOR CONTROLLING HARMONICS  
A power conversion system for controlling harmonics, which uses the Fourier transform analysis to calculate the harmonics element of each current, and adds the harmonicscompensation strategy into...
US20130208518 ELECTRIC POWER CONVERTER  
An electric power converter includes a DC stabilization circuit (2) configured to stabilize a DC voltage from DC power supply (1), and an inverter (3) configured to convert the DC voltage...
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...
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,...
US20130308353 NEAR ZERO CURRENT-RIPPLE INVERSION OR RECTIFICATION CIRCUITS  
The present invention relates to a near zero current-ripple inversion circuit including top and bottom cells, a transformer (T1) comprising primary windings (P1, P2) and a secondary winding (S1),...
US20110261598 POWER CONVERTER WITH MULTI-LEVEL VOLTAGE OUTPUT AND HARMONICS FILTER  
A device for converting a DC voltage into an AC voltage and vice versa comprises at least one phase leg with a first voltage source and a first inductor connected in series between a first DC...
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...
US20130258726 ARRANGEMENT FOR TRANSMITTING POWER BETWEEN A DC POWER LINE AND AN AC POWER LINE  
An arrangement transmits power between a DC power line and an AC power line carrying a voltage having a number of phases. The arrangement includes a number of transformers, one for each phase and...
US20140133198 REACTIVE POWER COMPENSATOR  
A reactive power compensator according to an embodiment comprises: multilevel inverter circuits respectively constituting each of the three phases; a filter circuit for reducing harmonics...
US20140268932 DC-AC INVERTER WITH SOFT SWITCHING  
Provided are single phase and multiple phase DC-AC inverters with soft switching, and related methods and uses. The DC-AC inverters comprise at least one voltage source inverter circuit or at...
US20140285024 POWER INVERTERS WITH MULTIPLE INPUT CHANNELS  
A method and apparatus is disclosed for intelligently inverting DC power from DC sources such as photovoltaic (PV) solar modules to single-phase or three-phase AC power to feed the power grid for...
US20140126252 METHOD FOR CONTROLLING HARMONICS AND RESONANCES IN AN INVERTER  
In a method based on the MPDTC algorithm for controlling an inverter of an electrical system, the harmonics and resonances in the inverter can be damped by extracting frequency information from...
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...
US20130229838 MULTIPLE INVERTER AND ACTIVE POWER FILTER SYSTEM  
A multiple inverter with neutral line inductor and an active power filter system are disclosed. In the disclosure, the multiple inverter comprises at least two inverter units connected in...
US20140211521 SCALABLE SINGLE-STAGE DIFFERENTIAL POWER CONVERTER  
An embodiment of the invention is a scalable single stage differential power converter. The inverter can be implemented in signal, split and multi-phases. A multiphase converter can be achieved...
US20130121043 HARMONIC CANCELLING INTERPHASE MAGNETIC DEVICE  
A harmonic cancelling interphase magnetic device (1) comprising a magnetic core of rectangular shape with three wound legs (14) and two non-wound legs (12), wherein the cross-section of said...
US20110013429 DC SOURCE ASSEMBLIES  
Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source...
US20150115797 HIGH-FREQUENCY POWER SUPPLY DEVICE AND IGNITION VOLTAGE SELECTION METHOD  
When RF power is supplied from an RF generator to a load via a power supply unit, (a) the internal impedance of the RF generator is made lower than the characteristic impedance of the power supply...
US20130135907 HARMONIC CURRENT SUPPRESSION METHOD AND HARMONIC CURRENT SUPPRESSION DEVICE OF POWER CONVERSION DEVICE  
A current control unit takes a deviation between a current command value and a current flowing through an inverter of a power conversion device, and controls the inverter based on the deviation. A...
US20120281442 SYSTEM AND METHOD FOR OFFSETTING THE INPUT VOLTAGE UNBALANCE IN MULTILEVEL INVERTERS OR THE LIKE  
The system for offsetting the input voltage unbalance in multilevel inverters or the like comprises a control unit operatively associated with a multilevel inverter for converting direct current...
US20100135051 THREE-PHASE INVERTER FOR CONVERTING DC POWER FROM A GENERATOR INTO THREE-PHASE AC POWER  
A three-phase inverter for converting DC power from a generator into three-phase AC power comprises a transformer for transforming two single phase alternating voltages with a fixed phase offset...
US20090237963 UPS FREQUENCY CONVERTER AND LINE CONDITIONER  
Systems and methods disclosed herein monitor and control input to a converter in one or more of a UPS, a frequency converter, or a line conditioner. Distortion due at least in part to ripple...
US20130322136 ADVANCED CIRCUIT ARRANGEMENT OF TRANSFORMERLESS 1 PHASE PV INVERTER  
Disclosed is an inverter with outputs being connected through two reactors to a utility network, whilst an energy storage capacitor (C) is connected to the PV array (P) such that the C + and −...
US20090257254 VOLTAGE-CLAMP POWER CONVERTERS  
Several inversion circuits used to convert a DC input to an AC output comprise two series circuits, at least one clamp capacitor, and at least one transformer. Each of the series circuits is in...
US20130155732 METHODS AND SYSTEMS FOR OPERATING A POWER CONVERTER  
A power conversion system for providing power to an electrical grid is described. The power conversion system includes a power converter coupled to a power source and the electrical grid. The...
US20130147264 THREE PHASE INVERTER DRIVER  
A system and method of use of a three-phase inverter driver is disclosed. In some exemplary embodiments three single-phase inverters are connected to the three-phase AC input of electric vehicle...
US20150214832 Three-Phase Inverter with a Repositioned Choke  
A method and apparatus for converting direct current into alternating current. The direct current is converted into a number of alternating currents using a switch system. The number of...
US20090244936 Three-phase inverter  
The present invention relates to a three-phase inverter (1) with a circuit arrangement having a DC-voltage input (2) for at least one direct voltage source, and a three-phase alternating voltage...
US20100236612 Inverter for a Distributed Power Generator  
Provided is a maximum power point (MPP) tracker for a PV cell inverter, and a PV cell inverter. The MPP tracker decouples output power oscillations from the input power generation and extracts...
US20090097283 Methods for Minimizing Double-Frequency Ripple Power in Single-Phase Power Conditioners  
A method is provided for minimizing a double-frequency ripple power exchanged between a load and an energy source, the energy source delivering electrical power to the load through a single-phase...
US20120236607 Unified Control of Single and Three-Phase Power Converters  
Provided herein are unified control methods and implementations for controlling single and three-phase power converters. In an exemplary embodiment, a unified controller is provided that can be...
US20140268927 VOLTAGE CONVERTER SYSTEMS  
A voltage converter system includes a first DC-AC voltage converter that converts a first DC voltage signal to a first AC voltage signal. A DC link converts the first AC voltage signal to a second...
US20100277958 POWER MODULE ASSEMBLY  
A power module assembly of the type suitable for deployment in a vehicular power inverter, wherein the power inverter has a grounded chassis, is provided. The power module assembly comprises a...
US20080211450 ROTATING MACHINERY CONTROLLER  
A rotating machinery includes a first control member for performing rectangular wave control by operating the switching devices of an inverter such that an on-state and an off-state occur once for...
US20090154202 Backlight inverter and method of driving same  
A backlight inverter is provided which includes at least one inverter transformer and to which a plurality of cold cathode fluorescent lamps are connected, wherein a plurality of primary windings...
US20120014143 INVERTER FILTER INCLUDING DIFFERENTIAL MODE AND COMMON MODE, AND SYSTEM INCLUDING THE SAME  
An inverter filter is for a plurality of phases. The inverter filter includes a node; a differential mode filter including for each of the phases a first terminal, a second terminal, an inductor...
US20150029766 ELECTROMAGNETIC COMPATIBILITY FILTER WITH AN INTEGRATED POWER LINE COMMUNICATION INTERFACE  
An embodiment of the present invention is directed to an integrated electromagnetic compatibility (EMC) filter and power line communication (PLC) interface. The EMC filter and PLC interface...
US20130135906 CONTROLLER OF POWER CONVERTER  
A controller of a power converter has: an average loss calculator (202) calculating an average loss in a semiconductor device; and a partial temperature variation estimation part (204), while...

Matches 1 - 50 out of 142 1 2 3 >