1
Anders V Rebsdorf, Lars Helle: Variable speed wind turbine having a matrix converter. Vestas Wind Systems R&D, Finnegan Henderson Farabow Garrett & Dunner, May 20, 2003: US06566764 (139 worldwide citation)

A variable speed wind turbine is disclosed comprising a turbine rotor that drives a doubly-fed induction generator, a matrix converter which converts variable frequency output into constant frequency output, and a control unit and a protection circuit for the matrix converter. Power is circulated in ...


2
Lorenz Feddersen, Eckardt Siebenthaler, Björn Andresen: Variable speed wind turbine having a passive grid side rectifier with scalar power control and dependent pitch control. Vestas Wind Systems, Finnegan Henderson Farabow Garrett & Dunner L, March 21, 2006: US07015595 (64 worldwide citation)

A variable speed wind turbine having a passive grid side rectifier using scalar power control and dependent pitch control is disclosed. The variable speed turbine may include an electrical generator to provide power for a power grid and a power conversion system coupled to the electrical generator. ...


3
Haiqing Weng, Robert William Delmerico, Xiaoming Yuan, Changyong Wang: System and method of operating double fed induction generators. General Electric Company, Ann M Agosti, Patrick K Patnode, August 7, 2007: US07253537 (38 worldwide citation)

A protection system and a protection method are provided for protecting a double fed induction generator and a gearbox during a grid fault. The protection system includes a plurality of controlled impedance devices. Each of the controlled impedance devices is coupled between a respective phase of a ...


4
Donal E Baker: Variable speed constant frequency power system with auxiliary DC output. Westinghouse Electric, R P Lenart, November 19, 1985: US04554501 (33 worldwide citation)

A DC-link, variable speed constant frequency power system is provided with an auxiliary DC output. The system includes a variable speed generator for producing a DC voltage on a pair of DC-link conductors. When the generator is operated in its normal speed range, an inverter converts the DC voltage ...


5
John E Jordan: Constant frequency variable rpm generator. Trask & Britt, January 20, 1981: US04246531 (32 worldwide citation)

A prime mover delivers rotational torque to a generator having an exciter and a main unit connected sequentially along the prime mover output shaft. A voltage sensor is connected to the generator output and supplies a signal reflective of the output voltage to a frequency source. The frequency sourc ...


6
Ralph Teichmann, Lei Li, Changyong Wang, Wenqiang Yang: Method, apparatus and computer program product for wind turbine start-up and operation without grid power. General Electric Company, Ann M Agosti, Patrick K Patnode, July 1, 2008: US07394166 (30 worldwide citation)

A wind turbine having features for black-starting includes an electric generation system for producing electricity by operation of the wind and comprising an interface for providing the electricity to an electric grid; a control system for controlling components of the wind turbine during start-up o ...


7
Lorenz Feddersen: Circuit arrangement and methods for use in a wind energy installation. Vestas Wind Systems, Cantor Colburn, September 5, 2006: US07102247 (30 worldwide citation)

The invention relates to a circuit with a variable rotational speed to be used particularly in a wind power plant, comprising a double fed asynchronous generator (DASM), a crow-bar, an additional resistor (R15) and a converter. In order to meet the requirements of the network provider, whereby a par ...


8
Benjamin Ziph, Scott Strodtman, Thomas K Rose: Speed and power control of an engine by modulation of the load torque. Harness Dickey & Pierce, January 26, 1999: US05864770 (26 worldwide citation)

A system and method of speed and power control for an engine in which speed and power of the engine is controlled by modulation of the load torque. The load torque is manipulated in order to cause engine speed, and hence power to be changed. To accomplish such control, the load torque undergoes a te ...


9
Leo G Nickoladze: Synchronous generators. I Michael Bak Boychuk, October 20, 1987: US04701691 (26 worldwide citation)

In a compound electromechanical assembly having a first singly fed stage mounted for common rotation with a second singly fed stage mounted for common rotation with a second singly fed stage impedance is inserted in inverted connection to form an electrical loop between the secondaries. The impedanc ...


10
Gilbert Hamelin, Lucien Palma: Electric power supply unit, in particular for a motor vehicle, and an electric rotary machine for such a unit. Valeo, Cushman Darby & Cushman, April 25, 1989: US04825139 (25 worldwide citation)

The electric power supply comprises an electric rotary machine intended to be driven by an engine in order to supply electrical energy to a battery and/or to various user units, and rectifier means combined with the machine for obtaining direct current. The machine is chosen in such a way that when ...