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Wind turbine blade pitch control system

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PHILLIPS LYTLE LLP (2010) Wind turbine blade pitch control system. US20100061852.

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Official URL: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=P...

Abstract/Summary

The present invention provides an improvement for a wind turbine (20) having at least one blade (21) mounted on a hub (22) for controlled rotation about a blade axis (yb-yb) to vary the pitch of the blade relative to an airstream. The hub is mounted on a nacelle (23) for rotation about a hub axis (xh-xh). The wind turbine includes a main pitch control system for selectively controlling the pitch of the blade, and/or a safety pitch control system for overriding the main blade pitch control system and for causing the blade to move toward a feathered position in the event of an overspeed or fault condition. The improvement includes: an energy storage device (26) mounted on the nacelle and associated with the blade; a pitch-axis controller (25) mounted on the nacelle and associated with the blade and with the energy storage device; an electro-mechanical actuator (28) mounted on the hub and associated with the blade; and at least one slip ring (29) operatively arranged to transmit power and/or data signals between the pitch-axis controller and the electro-mechanical actuator; whereby the mass on the rotating hub may be reduced.

Item Type:Patent
Divisions:No Reading authors. Back catalogue items
Faculty of Science > School of Systems Engineering
ID Code:5794
Additional Information:Inventors: Potter; Benjamin; (Reading, GB) ; Nagasaki; Ryuichi; (Fujisawa-shi, JP) ; Shiga; Mamoru; (Chigasaki-shi, JP)

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