06137187 is referenced by 113 patents and cites 20 patents.

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
8/907513
Publication Number
6137187
Application Date
August 8, 1997
Publication Date
October 24, 2000
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
Assignee
Zond Energy Systems
CA, US
IPC
H02P 9/00
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