Fluid reaction surfaces (i.e. – impellers) – Interrelated controls for impeller and drive means – Pitch adjustment related to drive brake or clutch operation
Patent
1981-07-13
1984-12-25
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Interrelated controls for impeller and drive means
Pitch adjustment related to drive brake or clutch operation
416 32, 416 41, 416152, 416165, F03D 704
Patent
active
044900937
ABSTRACT:
A windpower system includes a support and a turbine having a shaft rotatively mounted to the support. The turbine has variable pitch blades whose pitch is controlled by the differential motion of a rotary control shaft coaxial with the turbine shaft and the turbine shaft itself so that the blade pitch can be varied by a stationary motor without requiring any slip rings or other such wear-prone couplings. In the event of a power failure, rotary motion of the control shaft is prevented so that the turbine blades are feathered solely due to the force developed by the rotating turbine. Also, if the turbine is used to generate electrical power, an induction generator coupled to the turbine shaft is employed whose shaft speed is indicative of generator output power. Accordingly, generator speed is monitored and used to control the pitch of the turbine blades so as to maintain generator output power at the maximum value when wind speed is below the machine's rated wind speed, and no more than rated output power when wind speed exceeds rated wind speed.
REFERENCES:
patent: 1929436 (1933-10-01), McCollough
patent: 2480468 (1949-08-01), Hoinville
patent: 2738045 (1956-03-01), Mergen et al.
patent: 2860714 (1958-11-01), DeMuth
patent: 4006925 (1977-02-01), Scherer
patent: 4047842 (1977-09-01), Avena et al.
patent: 4066911 (1978-01-01), Sarchet
patent: 4193005 (1980-03-01), Kos et al.
patent: 4310284 (1982-01-01), Randolph
patent: 4348154 (1982-09-01), Ducker
patent: 4364708 (1982-12-01), David
patent: 4366387 (1982-12-01), Carter et al.
Chertok Allan
Gjertsen, Sr. John
Manfredi Louis
Powell Jr. Everette A.
U.S. Windpower, Inc.
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