1
Phyllis R Heronemus: Offshore wind turbine with multiple wind rotors and floating system. Ocean Wind Energy Systems, July 11, 2006: US07075189 (120 worldwide citation)


A wind energy conversion system optimized for offshore application. Each wind turbine includes a semi-submersible hull with ballast weight that is moveable to increase the system's stability. Each wind turbine has an array of rotors distributed on a tower to distribute weight and loads and to improv ...


2
Amir S Mikhail, Craig L Christenson, Kevin L Cousineau, William L Erdman, William E Holley: Variable speed wind turbine generator. Zond Energy Systems, Blakely Sokoloff Taylor & Zafman, October 24, 2000: US06137187 (117 worldwide citation)


A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...


3
William J Mouton Jr, David F Thompson: Airship power turbine. Rollin D Morse, September 4, 1979: US04166596 (103 worldwide citation)


Power is mechanically transmitted from a tethered airship carrying wind turbines to electrical generators on the ground at the anchor point of the tether, by the use of endless power-transmission cables bridging between drive sheaves at the turbine wheels and driven sheaves at the generators. Tether ...


4
Dan Keith McCoin: Wind energy conversion system. WECS, August 29, 2006: US07098552 (97 worldwide citation)


A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported ...


5
Dan Keith McCoin: Wind energy conversion system. WECS, October 3, 2006: US07116006 (96 worldwide citation)


A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported ...


6
Dan Keith McCoin: Wind energy conversion system. WECS, October 4, 2005: US06952058 (89 worldwide citation)


A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported ...


7
Joseph M Kos, John P Patrick, Kermit I Harner: Multi-mode control system for wind turbines. United Technologies Corporation, Donald F Bradley, March 11, 1980: US04193005 (87 worldwide citation)


A multi-mode electronic wind turbine control system establishes a reference blade angle for a two-bladed, horizontal axis, variable pitch wind turbine rotor, the blade angle being regulated by a hydraulic pitch change mechanism. The rotor, via appropriate shafts and a gearbox, is coupled to a synchr ...


8
Amir S Mikhail, Craig L Christenson, Kevin L Cousineau, William L Erdman, William E Holley: Variable speed wind turbine generator. Zond Energy Systems, Blakely Sokoloff Taylor & Zafman, July 16, 2002: US06420795 (86 worldwide citation)


A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...


9
Robert R Wilson: Wind turbines. James Howden & Company, Barnes & Thornburg, March 10, 1987: US04648801 (81 worldwide citation)


A wind turbine assembly includes a wind turbine 18 mounted in a head 16, the wind turbine driving, via a gear box 22, an air compressor 24, 25, the inlet 26 of which is arranged to withdraw air from the vicinity of the blades of the turbine 18 to improve the efficiency of the turbine. The compressed ...


10
Amir S Mikhail, Craig L Christenson, Kevin L Cousineau, William L Erdman, William E Holley: Variable speed wind turbine generator. General Electric Company, Blakely Sokoloff Taylor & Zafman, February 15, 2005: US06856039 (68 worldwide citation)


A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field orien ...



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