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US 4,297,076 AGranted
Wind turbine
AssigneeLockheed Corporation
InventorsRobert E. Donham, Richard L. Heimbold
Life of this patent
Estimating the term…
Abstract
An improved wind turbine in which the tip portions of the blades are variable in pitch and are cyclically varied in pitch to control the yaw of the rotor and to relieve bending moments on the blades and are collectively varied in pitch to relieve bending moments on the blades and to maximize the power output of the turbine at a selected constant rotor speed.
Claims13
A wind turbine comprising:
- a rotor, said rotor including a plurality of blades, the tip portions of said blades being variable in pitch and adapted to aerodynamically interact with the wind;
- support means for supporting said rotor;
- load measurement means coupled to said blades for measuring the bending moment on said blades and for providing an output signal representative thereof;
- and
- adjustment means coupled to said load measurement means for varying the pitch of said tip portions in response to said output signal.
2 more elements
Dependencies are inferred from the claim text.