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1. (WO2013162920) WIND TURBINE BLADE PITCH REDUNDANT SAFETY ARRANGEMENT

Pub. No.:    WO/2013/162920    International Application No.:    PCT/US2013/036377
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Sat Apr 13 01:59:59 CEST 2013
IPC: F03D 7/00
Applicants: KOLLMORGEN CORPORATION
Inventors: BOYLAND, John
Title: WIND TURBINE BLADE PITCH REDUNDANT SAFETY ARRANGEMENT
Abstract:
A wind turbine includes a blade position adjustment system providing for continued wind turbine blade repositioning operation even after the occurrence of certain faults. The system includes a plurality of electrically operable motors, each of which is interconnected with one of the wind turbine blades to reposition that wind turbine blade and modify the blade pitch. Each motor includes two or more sets of electrically isolated windings, and a power supply is separately interconnected with each of the electrically isolated winding sets to provide for continued repositioning of each blade upon occurrence of a fault, such as voltage or current deterioration, in one of the winding sets.