Patent Number: 7,355,294

Title: Method and system for wind turbine blade movement

Abstract: This document discusses, among other things, a wind turbine blade pitch system for moving the blades to control their pitch in the event of a power failure. The system includes at least one backup that has a non-electrical component that can pitch the blades in the event that the power failure adversely affects the electrical blade pitch actuator system. Embodiments include pitch systems that have a plurality of pitch driving systems including, but not limited to electrical systems, hybrid electrical/mechanical systems and non-electrical systems. The non-electrical systems include mechanical, pneumatic or hydraulic systems.

Inventors: Teichmann; Ralph (Albany, NY)

Assignee: General Electric Company

International Classification: F03D 7/04 (20060101)

Expiration Date: 2020-04-08 0:00:00