1
William L Erdman: Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation. U S Windpower, Blakely Sokoloff Taylor & Zafman, July 6, 1993: US05225712 (229 worldwide citation)

A wind turbine power converter is disclosed herein that smooths the output power from a variable speed wind turbine, to reduce or eliminate substantial power fluctuations on the output line. The power converter has an AC-to-DC converter connected to a variable speed generator that converts wind ener ...


2
Robert D Richardson, William L Erdman: Variable speed wind turbine. U S Windpower, Blakely Sokoloff Taylor & Zafman, January 21, 1992: US05083039 (216 worldwide citation)

A variable speed wind turbine is disclosed comprising a turbine rotor that drives an AC induction generator, a power converter that converts the generator output to fixed-frequency AC power, a generator controller, and an inverter controller. The generator controller uses field orientation to regula ...


3
Amir S Mikhail, Kevin L Cousineau, Lawrence H Howes, William Erdman, William Holley: Variable speed distributed drive train wind turbine system. Clipper Windpower Technology, Owen L Lamb, May 9, 2006: US07042110 (129 worldwide citation)

A variable speed wind turbine employing a rotor connected to a multiplicity of synchronous generators with wound field or permanent magnet rotors. A passive rectifier and an inverter are used for power transfer back to the grid. A Turbine Control Unit (TCU) commands a required generator torque based ...


4
William E Holley: Speed control system for a variable speed wind turbine. U S Windpower, Blakely Sokoloff Taylor & Zafman, February 22, 1994: US05289041 (109 worldwide citation)

A controller and method is disclosed for operating a variable speed turbine to track wind speed fluctuations for high efficiency in conversion of wind energy to electrical energy. The controller of the invention controls the rotor speed in accordance with a wind speed supplied by a wind observer in ...


5
Oliver C Eckel: Wind turbine. Schiller & Pandiscio, February 20, 1979: US04140433 (103 worldwide citation)

A power-generating wind-driven turbine is disclosed which offers the advantage that it is compact and lightweight and is capable of producing a substantially greater output than a conventional windmill with a comparable size rotor. The turbine comprises an outer shroud and a nose cone which provide ...


6
William E Holley: Speed control system for a variable speed wind turbine. U S Windpower, Blakely Sokologg Taylor & Zafman, October 13, 1992: US05155375 (90 worldwide citation)

A controller and method is disclosed for operating a variable speed turbine to better track wind speed fluctuations for greater efficiency in conversion of wind energy to electrical energy. The controller of the invention controls the rotor speed in accordance with a wind speed supplied by a wind ob ...


7
Nicholas F Pedersen, Gaylord O Ellis: Wind turbine. Barnes Kisselle Raisch & Choate, May 3, 1977: US04021135 (90 worldwide citation)

A wind turbine including a reaction type turbine wheel instead of an impulse type turbine which is normally used for receiving the wind and more efficiently deriving power therefrom and an augmenter means for producing a vortex downstream of the turbine at the exit of the turbine to increase the pre ...


8
James T Yen: Tornado-type wind turbine. Grumman Aerospace Corporation, Morgan Finnegan Pine Foley & Lee, January 24, 1978: US04070131 (69 worldwide citation)

Atmospheric wind is admitted tangentially into a vertically extending structure and directed against the interior curved surface of the structure to produce vortex flow. The structure is open ended and spaced from ground or connected to a ram-air subterranean tunnel. The vortex flow and correspondin ...


9
Kotaro Nakamura, Masao Mabuchi, Shinichi Hosomi, Hironobu Hisashi: Maximum power follow-up control apparatus. Omron Coproration, Foley & Lardner, May 16, 2006: US07045991 (56 worldwide citation)

A power conditioner 10 is provided with a maximum power follow-up control portion 12 for setting a DC operating voltage of a power converter 11, which converts output power of a power generator 2 into AC power, for making a power point corresponding to the output level of the power generator follow ...


10
Arnold M Lund: Wind turbine with multiple generators. Baker Maxham & Jester, April 29, 1986: US04585950 (55 worldwide citation)

Multiple induction type generators are drivingly connected to an impeller. As wind velocity increases, the generators are successively activated until all of the generators are operating at a maximum wind velocity. As the wind velocity decreases, the generators are successively de-activated until al ...