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:
Aug. 16, 2016
Filed:
Jun. 26, 2013
John M. Obrecht, Louisville, CO (US);
Karsten Schibsbye, Fredericia, DK;
John M. Obrecht, Louisville, CO (US);
Karsten Schibsbye, Fredericia, DK;
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
A method for controlling aerodynamic loads in wind turbine (), includes stopping rotation of blades () of the turbine about a rotor shaft axis (); stopping rotation of a nacelle () of the turbine about a vertical yaw axis (); pitching each blade of the turbine about its respective pitch axis () into a stable pitch angle range (B-C orE-F) in which a resulting root twisting moment () created by a current wind loading () on the respective blade is in a direction urging pitch rotation of the blade toward a position of lower root twisting moment; and releasing the blades to rotate passively about their respective pitch axes during subsequent changing wind directions (V). A blade may be designed to better align a root zero twisting moment (A,D) in the stable pitch angle range with a minimum (B,D,B,D) wind loading.