Prime-mover dynamo plants – Electric control – Fluid-current motors
Reexamination Certificate
2008-04-01
2008-04-01
Waks, Joseph (Department: 2834)
Prime-mover dynamo plants
Electric control
Fluid-current motors
C290S055000
Reexamination Certificate
active
11368939
ABSTRACT:
A method for controlling a rotational speed of a rotor having at least one rotor blade, a rotor shaft, and an electrical generator coupled thereto. The method includes controlling a torque of the rotor shaft by controlling a torque of the electrical generator, alternating between changing an angle of pitch of the at least one rotor blade and maintaining the angle of pitch of the at least one rotor blade substantially constant, and maintaining a substantially constant rotational speed of the rotor during variable wind speeds above a predetermined rated wind speed.
REFERENCES:
patent: 4495423 (1985-01-01), Rogers
patent: 4695736 (1987-09-01), Doman et al.
patent: 4700081 (1987-10-01), Kos et al.
patent: 4703189 (1987-10-01), DiValentin et al.
patent: 5083039 (1992-01-01), Richardson et al.
patent: 5155375 (1992-10-01), Holley
patent: 6137187 (2000-10-01), Mikhail et al.
patent: 6856039 (2005-02-01), Mikhail et al.
patent: 7042110 (2006-05-01), Mikhail et al.
patent: 7081689 (2006-07-01), Tilscher et al.
patent: 7233129 (2007-06-01), Erdman et al.
patent: 2004/0119292 (2004-06-01), Datta et al.
patent: 2004/0207208 (2004-10-01), Mikhail et al.
patent: 2005/0253396 (2005-11-01), Mikhail et al.
patent: 2006/0033338 (2006-02-01), Wilson
patent: 2007/0170724 (2007-07-01), Calley
patent: 0 120 654 (1988-06-01), None
patent: 1 612 413 (2006-01-01), None
patent: 1832743 (2007-09-01), None
patent: 59183085 (1984-10-01), None
patent: 10159706 (1998-06-01), None
patent: 2005042603 (2005-02-01), None
patent: WO 2004/067958 (2004-08-01), None
patent: WO 2006/007838 (2006-01-01), None
patent: WO 2006136337 (2006-12-01), None
EPO Search Report, App. No. 07103533 (Jul. 9, 2007).
Hau, E., “Windkraftanlagen, 10.3. Leistungs” (XP002398040) 318-333 (1995).
Leithead, et al., “Role and objectives of control for wind turbines,” IEE Proceedings-C, 138:2C, pp. 135-148 (Mar. 1, 1991).
Cunningham John Noel
Gebhardt Eric
Holley William Edwin
Pierce Kirk Gee
Uphues Ulrich
Armstrong Teasdale LLP
General Electric Company
Waks Joseph
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