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:
Jan. 25, 2005
Filed:
May. 06, 2004
Amir S. Mikhail, Tehachapi, CA (US);
Craig L. Christenson, Tehachapi, CA (US);
Kevin L. Cousineau, Tehachapi, CA (US);
William L. Erdman, Brentwood, CA (US);
William E. Holley, Pleasanton, CA (US);
Amir S. Mikhail, Tehachapi, CA (US);
Craig L. Christenson, Tehachapi, CA (US);
Kevin L. Cousineau, Tehachapi, CA (US);
William L. Erdman, Brentwood, CA (US);
William E. Holley, Pleasanton, CA (US);
General Electric Company, Schenectady, NY (US);
Abstract
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 oriented control, and the PID controller performs pitch regulation based on generator rotor speed.