Fluid reaction surfaces (i.e. – impellers) – Method of operation
Reexamination Certificate
2009-04-02
2010-12-21
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Method of operation
C416S061000, C416S500000
Reexamination Certificate
active
07854589
ABSTRACT:
The invention relates to a wind turbine comprising a rotor including one or more pitchable blades, and detection means for detecting edgewise oscillations in one or more of said blades. The wind turbine is characterized in that the wind turbine comprises control means for changing the pitch angle of one or more of the blades if the detection means detects edgewise oscillations in one or more of the blades, hereby damping or eliminating the edgewise oscillations. The invention further relates to a method for damping edgewise oscillations in one or more blades of a wind turbine and use hereof.
REFERENCES:
patent: 4329117 (1982-05-01), Doman
patent: 7400055 (2008-07-01), Nagao
patent: 7692822 (2010-04-01), Tanaka
patent: 2006/0033338 (2006-02-01), Wilson
patent: 2009/0169378 (2009-07-01), Menke
patent: 1719910 (2006-11-01), None
patent: 1816347 (2007-09-01), None
patent: 2117933 (1983-10-01), None
patent: 9701709 (1997-01-01), None
patent: 99/32789 (1999-07-01), None
patent: 9936695 (1999-07-01), None
patent: 02084114 (2002-10-01), None
Daniel Trudnowski and David Lemieux, Independent Pitch Control using Rotor Position Feedback for Wind-Shear and Gravity Fatigue Reduction in a Wind Turbine, Proceedings of the American Control Conference, Anchorage, AK, May 8-10, 2002, XP10597604A (6 pages).
Danish Search Report, May 11, 2007 (1 page).
International Search Report, Jan. 17, 2008 (3 pages).
International Preliminary Report on Patentability & Written Opinion of the International Searching Authority; PCT/DK2007/000403; Apr. 7, 2009; 7 pages.
Nielsen Thomas Steiniche Bjertrup
Spruce Christopher John
Nguyen Ninh H
St. Onge Steward Johnston & Reens LLC
Vestas Wind Systems A/S
LandOfFree
Wind turbine, a method for damping edgewise oscillations in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wind turbine, a method for damping edgewise oscillations in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wind turbine, a method for damping edgewise oscillations in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4173424