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US20120001435 GENERATOR POWER CONDITIONING  
The present invention relates to electricity generating equipment, particularly off-shore generators for generating electricity from tidal streams, marine currents or wave motion. In a generator...
US20140204629 ACPOWER PUPPLY POWER CIRCUIT  
An AC power supply power circuit comprises a power input unit connected to a DC/AC converter. The AC/DC converter is connected to a DC/DC circuit, and the DC/DC circuit is further connected to an...
US20120257424 Limiting Peak Electrical Power Drawn by Mining Excavators  
The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy...
US20140307487 Full Bridge Oscillation Resonance High Power Factor Invertor  
A full bridge oscillation resonance high power factor invertor being connected between a power source and a Load has a first inductor and a second inductor. The first and second inductors are...
US20150137691 HALF-BRIDGE INVERTER, ELECTRONIC BALLAST AND LIGHTING DEVICE WITH THE HALF-BRIDGE INVERTER  
The invention discloses a half-bridge inverter which includes first and second inverter input terminals for receiving a direct current (DC) voltage, first and second inverter switches, first and...
US20130162047 Methods and Systems For Controlling An Intra-Plant Voltage Level  
A power plant coupled to, and configured to provide power to, an electrical grid, is described. The power plant includes a plurality of power converters electrically coupled to, and configured to...
US20140347896 DC LINK MODULE FOR REDUCING DC LINK CAPACITANCE  
A dc link module for a power circuit includes a first connector for connecting to a first power conversion circuit, a second connector for connecting to a second power conversion circuit, wherein...
US20130169289 METHOD AND APPARATUS FOR TESTING IN FIELD WIND TURBINES  
A method for testing in field a wind turbine. The wind turbine being configured for providing power at a given rated voltage and at a rated frequency of 50 or 60 Hz; the method comprising...
US20100308584 INTEGRATED WIND TURBINE CONTROLLER AND INVERTER  
The present invention relates to a method and apparatus for power generation, and in particular a method and apparatus for the control of electrical power generation for use primarily with wind...
US20130107586 SYSTEM FOR IMPROVED WIND TURBINE GENERATOR PERFORMANCE  
A system for improving wind turbine generator performance is disclosed. In one aspect a rotary power generation system is provided, including: a rotary power generator for generating...
US20130234641 CONVERTER SYSTEM  
The present disclosure discloses a converter system, which at least includes the first and second back-to-back converters. The first back-to-back converter includes a first rectifier module and a...
US20090256419 AC/AC POWER CONVERTER FOR AIRCRAFT  
A matrix converter circuit having two AC/AC matrix converters coupled in parallel in a first mode to power a starter and decoupled in a second mode to each power separate functions used in...
US20150130187 METHOD OF OPERATING A WIND PARK  
A wind turbine is provided having a first converter connected between an electric generator of the wind turbine and a DC link and a second converter connected between the DC link and an output of...
US20130163292 MID-POINT VOLTAGE CONTROL  
A midpoint voltage control system includes a power source, a generator coupled to the power source, a midpoint voltage controller coupled to the back-to-back converter configuration, a generator...
US20120127763 ELECTRIC POWER SUPPLY SYSTEM COMPRISING POWER MODULES COUPLED IN PARALLEL  
The present invention relates to an electric power supply system comprising at least two power modules coupled in parallel and comprising a first power module comprising a first control means...
US20090189393 MICRO WIND TURBINE TOPOLOGY FOR SMALL SCALE POWER GENERATION  
A wind energy converter has a generator adapted to be coupled directly to a wind turbine without need for a mechanical gear unit. A rectifier is coupled to the generator and a converter is coupled...
US20130223110 POWER CONVERSION SYSTEM AND ASSOCIATED METHOD  
It allows connecting or disconnecting polyphase conversion stages (2a, 2b), comprising at least two polyphase back-to-back conversion stages (2a, 2b) connected between a rotary electric machine...
US20130182466 EXCITATION CONTROL CIRCUIT AND ELECTRICALLY EXCITED WIND POWER SYSTEM HAVING THE SAME  
The present invention provides an excitation control circuit and the electrically excited wind power system having the same. The excitation control circuit includes a plurality of full-power...
US20130214604 UNINTERRUPTIBLE POWER SUPPLY SYSTEMS AND METHODS SUPPORTING LOAD BALANCING  
An uninterruptible power supply (UPS) system that includes a multiphase AC output configured to be coupled to a load, an inverter having an output coupled to the AC output and a control circuit...
US20140091735 Fan Conducted Noise Reduction  
Apparatus and methods for reducing unwanted conducted noise generated by a DC load 17. Load 17 is powered by a voltage source 11. A current sense 13 senses pulse current Ifan flowing through the...
US20110141772 Resonance Power Generator  
A resonance power generator is provided. The resonance power generator includes an alternating current/direct current (AC/DC) rectifier to rectify an input signal of an alternating voltage and an...
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...
US20130342019 POWER CONVERTER AND METHOD OF ASSEMBLING THE SAME  
A power converter includes a plurality of power conversion modules. At least one power conversion module includes a plurality of power conversion devices defining a three-level bridge. A first...
US20130182465 WIND POWER CONVERTER STRUCTURE AND WIND POWER GENERATION SYSTEM INCLUDING THE SAME  
A wind power converter structure and a wind power generation system including the converter structure are provided. The converter structure comprises a plurality of generator-side converters...
US20130308346 ACTIVE AC SNUBBER FOR DIRECT AC/AC POWER CONVERTERS  
Active AC snubbers for AC/AC converters are provided. The active snubbers are actively-controlled AC snubbers that may be used in AC/AC power converters including direct AC converters. The active...
US20140132295 DRIVE FAILURE PROTECTION  
The present techniques include methods and systems for detecting a failure in a capacitor bank of an electrical drive system. Embodiments include using discharge resistors to discharge capacitors...
US20150009723 POWER CONVERSION CIRCUIT  
A diode bridge has a pair of input ends to which an alternating current is inputted from an AC power supply, and a pair of output ends which output a direct current. A boost chopper circuit is...
US20120300509 POWER SUPPLY SYSTEM AND METHOD WITH ELECTRONIC HIGH-VOLTAGE TRANSFORMER  
A power supply system with an electronic high-voltage transformer includes an input module for receiving a current and eliminating disturbance in the current, a transformer module for transforming...
US20100118568 Low-Voltage Harmonic Filter for Full-Scale Converter Systems  
The present invention relates to a wind turbine facility comprising a power generator operationally connected to an AC/AC converter adapted to receive variable frequency AC-power from the power...
US20150036395 INTERNAL INVERTER COMMUNICATIONS  
Inverter internal communication features are disclosed. A multiple-stage inverter includes DC to DC and DC to AC converter switches in different power domains, which share no common return path...
US20090135629 Universal Irrigation Controller Power Supply  
Described herein are systems, methods and apparatuses for providing power to an irrigation controller. In one implementation, an apparatus comprises an alternating current (AC) to direct current...
US20150249416 SYSTEM AND METHOD FOR CONTROLLING A POWER GENERATION SYSTEM BASED ON A DETECTED ISLANDING EVENT  
In one aspect, a method for controlling the operation of a power generation system configured to supply power to an electrical grid may generally include detecting an occurrence of an islanding...
US20110149617 AC/AC CONVERSION POWER SUPPLY DEVICE  
Provided is an AC/AC conversion power supply device including: n(n≧2) rectification circuits (D1 to Dn) connected in series with respect to an AC input; n high-frequency switching circuits (SC1 to...
US20120086269 POWER CONVERSION SYSTEM AND UNINTERRUPTIBLE POWER SUPPLY SYSTEM  
An uninterruptible power supply system includes a plurality of uninterruptible power supply devices (U1 to U3) connected in parallel between a commercial AC power supply (70) and a load (71); and...
US20100244721 MODULAR PROGRAMMABLE LIGHTING BALLAST  
A lighting ballast is programmable as to input and output parameters. Both operational characteristics and sensed data are used to control the ballast parameters. The ballast is configured to...
US20140140110 Switch Mode Power Supply and Method for Operating the Switch Mode Power Supply  
A switch mode power supply and method for operating the power supply and to the use of the same, wherein the switch mode power supply comprises a control for controlling a control element and is...
US20080238196 ENERGY RECYCLE SYSTEM FOR USE WITH AC CURRENT POWER SUPPLY  
An energy recycle system for use with an AC current power supply, for example, an electronic ballast, is presented. The energy recycle system includes an energy recycle load connected to an output...
US20080285314 ADVANCED MATRIX CONVERTER AND METHOD FOR OPERATION  
A matrix converter may be provided with AC switches that comprise bi-directional sets of semiconductor switches that are gated with a common gating link. A low loss diode-bridge based snubber may...
US20130170254 CONTROL CIRCUIT AND METHOD FOR CONVERTERS OF WIND TURBINES  
Controlling a converter of a wind turbine is disclosed. The converter is connected to a rotor of a doubly fed asynchronous generator in order to feed electrical energy into an electric network....
US20080205092 INVERTER AND PROGRAMMING DEVICE THEREOF  
It is possible to easily and rapidly develop an inverter application while maintaining stable quality. Executable code modules which have been sufficiently tested are installed in an inverter. An...
US20100025995 CURRENT SOURCE CONVERTER-BASED WIND ENERGY SYSTEM  
Power conversion apparatus and methods are presented for providing electrical power to a grid or other load in which a synchronous machine is driven by a wind turbine or other prime mover to...
US20140009979 Power Transfer Devices, Methods, and Systems with Crowbar Switch Shunting Energy-Transfer Reactance  
The present application discloses methods, circuits and systems for power conversion, using a universal multiport architecture. When a transient appears on the power input (which can be, for...
US20140022827 DRIVE TRAIN COMPRISING A DOUBLY-FED ELECTRIC MACHINE AND AN INVERTER CONTROLLED ACCORDING TO A LAW LIMITING THE DELIVERED ACTIVE POWER  
A drive train comprising an electric machine including a rotor and a stator, the stator being connected to an alternating grid and having a stator frequency, and a bidirectional system for...
US20130016537 METHOD FOR CONTROLLING A FREQUENCY CONVERTER AND FREQUENCY CONVERTER  
A method for controlling a frequency converter is provided. The converter includes a rectifier, an inverter which is connected via a DC link to the rectifier, a rectifier controller and an...
US20070047270 Load detector for an AC-AC power supply  
There is provided a load detector for determining whether a load is connected to an AC-AC power supply. The power supply comprises a transformer having a primary winding and a secondary winding,...
US20090168467 CIRCUIT ARRANGEMENT HAVING A DUAL COIL FOR PRODUCING AN ALTERNATING VOLTAGE OR AN ALTERNATING CURRENT  
The invention relates to a circuit arrangement for producing an alternating voltage or an alternating current from a unipolar direct current source having an inverter relating to a neutral...
US20130027992 METHOD FOR INPUTTING POWER AND POWER INPUT SYSTEM  
The invention relates to a method for inputting power into a multiphase alternating current grid by means of a transformer which is electrically interconnected between the alternating current grid...
US20120155125 WIND TURBINE GENERATOR  
A wind turbine generator comprising: an electrical generator configured to generate AC signals, a plurality of power converters operated by a gating signal, each power converter configured to...
US20140233276 POWER CONVERTER CONTROL METHOD  
When an AC voltage is outputted to an inductive load, pulsation of an effective power caused by an odd number-th order harmonic component of a current flowing in this load is reduced. A modulation...
US20080278121 Electrical Energy Transmission Device  
An electrical energy transmission device has phase conductors, which carry alternating current and have transfer impedance, and sheathed conductors, which are inductively coupled to the phase...

Matches 1 - 50 out of 96 1 2 >