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.

Title
Variable speed wind turbine generator
Application Number
10/609268
Publication Number
20040094964
Application Date
June 26, 2003
Publication Date
May 20, 2004
Inventor
William E Holley
Pleasanton
CA, US
William L Erdman
Brentwood
CA, US
Kevin L Cousineau
Tehachapi
CA, US
Craig L Christenson
Tehachapi
CA, US
Amir S Mikhail
Tehachapi
CA, US
Agent
Blakely Sokoloff Taylor & Zafman
CA, US
Agent
Michael J Mallie
CA, US
IPC
F03D 09/00
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