The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2010
Filed:
Sep. 09, 2005
Brian Nedward Meyer, Fairview, PA (US);
Jeffrey Alan Melius, Roanoke, VA (US);
Cyrus David Harbourt, Roanoke, VA (US);
Christopher L. Tschappatt, Roanoke, VA (US);
Howard Ross Edmunds, Roanoke, VA (US);
William John Bonneau, East Troy, WI (US);
Amy Marlene Ridenour, Salem, VA (US);
Andrew Scott Wilkinson, Pittsburgh, PA (US);
Brian Nedward Meyer, Fairview, PA (US);
Jeffrey Alan Melius, Roanoke, VA (US);
Cyrus David Harbourt, Roanoke, VA (US);
Christopher L. Tschappatt, Roanoke, VA (US);
Howard Ross Edmunds, Roanoke, VA (US);
William John Bonneau, East Troy, WI (US);
Amy Marlene Ridenour, Salem, VA (US);
Andrew Scott Wilkinson, Pittsburgh, PA (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method for controlling a pitch control system of a wind turbine includes providing a charged backup battery configured to supply no energy to a DC link when full AC input power is available, wherein the DC link includes a DC link capacitor. The method further includes using energy stored in the DC link capacitor to operate a pitch control system during a loss or dip of AC input power, and maintaining charge on the DC link capacitor using the charged backup battery as voltage across the DC link capacitor drops during the operation of the pitch control system.