Method and system for wind turbine blade movement

Details Method and system for wind turbine blade movement Method and system for wind turbine blade movement

2008-04-08

2008-04-08

Ponomarenko, Nicholas (Department: 2834)

Prime-mover dynamo plants

Electric control

Fluid-current motors

C290S055000, C416S027000, C416S031000

Reexamination Certificate

active

07355294

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.

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