Sign up
Matches 1 - 50 out of 132 1 2 3 >


Match Document Document Title
US20120313443 SMART AND SCALABLE OFF-GRID MINI-INVERTERS  
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 supply power for off-grid...
US20100315850 POWER INVERTER  
A power inverter is provided for converting DC power into AC power. The inverter may be operable to couple to two or more transformer modules each operable to convert at least a portion of the DC...
US20110316480 SYSTEMS AND METHODS FOR DYNAMIC POWER COMPENSATION, SUCH AS DYNAMIC POWER COMPENSATION USING SYNCHROPHASORS  
An electrical power generation system, such as a solar power inverter, can provide dynamic real-time power compensation, so as to mitigate the effects of voltage sags and swells (e.g., on a utility...
US20120212065 SCALABLE AND REDUNDANT MINI-INVERTERS  
The Scalable and Redundant Mini-inverters as described in this invention include double, triple, or quadruple redundant capabilities so that the Mini-inverters can work in a harsh environment for a...
US20090206792 AUTOMATIC DISCONNECT OF AN AC SOURCE FROM A CONVERTER  
A system for automatic disconnect of an AC source from a converter that includes a converter and a converter. The converter includes a power supply capable of being connected to an alternating...
US20140119075 Parallel Connected Inverters  
A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter...
US20120319490 Parallel Connected Inverters  
A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter...
US20120033468 POWER CONVERSION SYSTEMS  
In a general aspect, a power conversion system includes a power converter, a transformer, and a voltage adjustment device. The power converter is configured to receive a variable DC power generated...
US20130063993 ALTERNATING CURRENT LINE EMULATOR  
An alternating current (AC) line emulator includes an AC power supply and an automatic regulating load. The AC power supply is used for providing an AC line frequency and an AC line voltage. The...
US20120188806 POWER DISTRIBUTION SYSTEM  
A power distribution system includes a DC-DC converter which outputs a DC power after converting the DC power outputted from a DC power source to a desired voltage level. In the power distribution...
US20110291486 METHOD FOR DISTRIBUTED POWER HARVESTING USING DC POWER SOURCES  
A system and method for combining power from DC power sources. Each power source is coupled to a converter. Each converter converts input power to output power by monitoring and maintaining the...
US20140198547 MULTILEVEL INVERTER  
There is provided a multilevel inverter capable of easily perform balancing of voltages by way of controlling switching of voltage dividing based on an offset between voltages divided by capacitors...
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...
US20120081937 Converters and Inverters for Photovoltaic Power Systems  
A power system includes a plurality of DC/DC converters and a DC/AC inverter. The plurality of DC/DC converters having outputs electrically connected in parallel for supplying a DC voltage bus to...
US20130043724 Solar Synchronized Loads for Photovoltaic Systems  
An electrical power supply arrangement includes a solar power device that converts sunlight into DC electrical power. A DC load runs on the DC current electrical power. The DC load may be...
US20130043723 SOLAR SYNCHRONIZED LOADS FOR PHOTOVOLTAIC SYSTEMS  
An electrical power supply arrangement includes a solar power device that converts sunlight into DC electrical power. A DC load runs on the DC current electrical power. The DC load may be...
US20110141779 Boost Multilevel Inverter System  
A boost inverter includes a first capacitor for connection in parallel with a dc supply voltage; a second capacitor connected in series with the first capacitor; an energy transfer path including a...
US20120170336 POWER CONVERSION CIRCUIT  
The present invention discloses a power conversion circuit. A control module controls a pulse width modulation regulator to regulate a duty cycle of a DC-DC converter according to the direct...
US20130155738 SYSTEM AND METHOD FOR CONTROLLING REACTIVE POWER IN A POWER CONVERSION SYSTEM  
A power conversion system includes a three-phase power converter electrically couplable to a photovoltaic power source for converting DC power to three-phase AC power; sensors for measuring voltage...
US20140185344 METHOD AND APPARATUS FOR DETERMINING A CORRECTED MONITORING VOLTAGE  
A method and apparatus for correcting a locally measured inverter voltage. In one embodiment, the method comprises determining a voltage compensation to compensate for a voltage drop along an AC...
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...
US20130229842 Solar Photovoltaic Power Conditioning Units  
We describe a photovoltaic power conditioning unit comprising: both dc and ac power inputs; a dc link; at least one dc-to-dc converter coupled between dc input and dc link; and a dc-to-ac converter...
US20080238195 DISTRIBUTED MAXIMUM POWER POINT TRACKING SYSTEM, STRUCTURE AND PROCESS  
Distributed maximum power point tracking systems, structures, and processes are provided for power generation structures, such as for but not limited to a solar panel arrays. In an exemplary solar...
US20120039101 Method of and Apparatus for Connecting a Photovoltaic Device to an AC Power Grid  
A method of connecting a photovoltaic device to an AC power grid through an inverter includes monitoring a DC voltage at an input of an inverter, and activating the inverter when the monitored DC...
US20120140535 METHOD FOR OPERATING A CONVERTER CIRCUIT  
A method for operating a converter circuit is provided. The converter circuit includes a converter unit and a transformer. The transformer includes at least one winding set with a primary winding...
US20130294127 SINGLE-PHASE VOLTAGE SOURCE DC-AC POWER CONVERTER AND THREE-PHASE VOLTAGE SOURCE DC-AC POWER CONVERTER  
A single-phase voltage source DC-AC power converter includes (a) a single-phase voltage source DC-AC power converting circuit having a gate signal generator that detects a single-phase AC output...
US20130077366 SOLAR ENERGY GENERATION SYSTEM TRACKING ADAPTIVE MAXIMUM POWER POINT AND ITS METHOD  
Provided are a solar energy generation system having an adaptive maximum power point tracking function and a method thereof. The solar energy generation system includes: a minimum maintenance...
US20090027932 ALTERNATIVE-SOURCE ENERGY MANAGEMENT  
A power converter system includes a power converter system including: a DC-to-AC power converter; a first output configured to be coupled to a power grid; a first input configured to be coupled to...
US20090046488 INVERTER CIRCUIT  
An inverter circuit (20) includes a transformer (T2) including a primary winding and a secondary winding including a high voltage terminal, a first copper foil (P21), a power stage circuit (21)...
US20140063881 INVERTER AND DRIVING METHOD THEREOF  
An inverter according to an embodiment of the present disclosure may include a converter having a switch, configured to convert a DC voltage into a half-wave rectified sine waveform voltage; a...
US20110163669 DC/AC INVERTER SUBSTRATE HAVING VOLTAGE ABNORMALITY DETECTOR CIRCUIT  
A DC/AC inverter substrate includes a voltage abnormality detector circuit. All of a high voltage side detection sensor, a low voltage side detection sensor, and a high-voltage and low-voltage...
US20130258732 SYSTEM AND METHOD FOR REDUCING REACTIVE CURRENT IN POWER CONVERTER BURN-IN TESTS  
A system and method for reducing reactive current in burn-in test systems for solar power converters is disclosed. An emulator configured to simulate a DC power source and the power converter...
US20120057377 UNINTERRUPTIBLE POWER SUPPLY WITH A DUAL GAIN VOLTAGE REGULATOR CONTROLLING AN INVERTER OUTPUT VOLTAGE BASED ON ACTIVE AND REACTIVE COMPONENTS OF CURRENT  
An uninterruptible power supply (UPS) system has an inverter having an output coupled to a primary side of an output transformer. The UPS system has a controller having a dual gain voltage...
US20080198639 OPERATION CONTROL CIRCUIT  
It is an object of the present invention to provide an operation control circuit without using a photo-coupler. The operation control circuit controls the operation of an LED in a DC/AC inverter...
US20090021967 Method for controlling a generation of an alternating current in a vehicle  
In a method for controlling a generation of an alternating current in a vehicle equipped with a battery and an inverter, the inverter is electrically connectable to the battery in order to generate...
US20110141778 SWITCH CONTROLLER FOR SWITCHING POWER SUPPLY AND METHOD THEREOF  
A switch controller for switching power supply is coupled to an auxiliary winding of the switching power supply through a detecting resistor. The switch controller provides a detecting current...
US20130193890 MEDIUM VOLTAGE INVERTER CONTROL APPARATUS AND MEDIUM VOLTAGE INVERTER SYSTEM  
An exemplary embodiment of the present disclosure includes a medium voltage inverter control apparatus and a medium voltage inverter system using the same. The medium voltage inverter control...
US20120147638 ELECTRIC POWER CONVERSION DEVICE  
An electric power conversion device includes a power conversion circuit for receiving electric power from an overhead wire through an LC filter circuit composed of a reactor and a capacitor and...
US20060261830 Inverter thermal protection  
An inverter has three redundant modes of thermal protection providing fire protection and secures protection of the inverter from thermal damage. An embodiment of the present invention is disclosed...
US20110164440 VOLTAGE-SENSED SYSTEM AND METHOD FOR ANTI-ISLANDING PROTECTION OF GRID-CONNECTED INVERTERS  
A method is provided for preventing islanding of a power source connected to an electric AC grid via an interface. The method senses an output voltage waveform of the interface, controls an output...
US20100277002 POWER CONVERSION SYSTEMS  
In a general aspect, a power conversion system includes a power converter, a transformer, and a voltage adjustment device. The power converter is configured to receive a variable DC power generated...
US20130141956 BATTERY FREE OFF-GRID SOLAR INVERTER SYSTEM AND CONTROL METHOD THEREOF  
A battery free off-grid solar inverter system includes an inverter and a controller. The inverter is used for converting a direct current voltage provided by a solar panel into an alternating...
US20130182474 POWER CONVERSION DEVICE FOR SOLAR ENERGY GENERATING SYSTEM  
A power conversion device includes a DC-DC converter, a DC-AC inverter and a relay. The DC-DC converter leads in a DC from an external solar panel and transforms the DC into a direct voltage. The...
US20080084722 Inverter Circuit and Backlight Unit Having the Same  
An inverter circuit according to an embodiment comprises an input unit to which a first voltage is applied, a transformer for transforming the first voltage output from the input unit, a first...
US20110254372 Alternative-Source Energy Management  
A power converter system includes a power converter system including: a DC-to-AC power converter; a first output configured to be coupled to a power grid; a first input configured to be coupled to...
US20090010030 Power supply circuit with feedback circuit  
An exemplary power supply circuit (200) includes a pulse width modulation circuit (220) providing a pulse signal, a voltage conversion circuit (210) converting a primary voltage to an output...
US20120020128 FUEL CELL SYSTEM  
A fuel cell system FCS includes a fuel cell FC, a motor ES4 connected to the fuel cell FC, an FC boost converter ES6 which raises the output voltage of the fuel cell FC to output the voltage to the...
US20140070619 METHOD AND APPARATUS FOR BIDIRECTIONAL POWER PRODUCTION IN A POWER MODULE  
Method and apparatus for generating power. In one embodiment the method comprises determining a value of a DC parameter pertaining to a DC power source providing DC power to an inverter; comparing...
US20130301321 TRACKING CONVERTERS WITH INPUT OUTPUT LINEARIZATION CONTROL  
In a preferred embodiment, a voltage inverter comprises a voltage converter circuit and a controller. The voltage inverter produces a time-varying output voltage from an input voltage, which can be...
Matches 1 - 50 out of 132 1 2 3 >