Yawing device and method of controlling it

Details Yawing device and method of controlling it Yawing device and method of controlling it

1988-02-01

1990-10-30

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

With means positioning fluid current driven impeller...

416 1, 416 11, 290 44, F03D 704

Patent

active

049665251

ABSTRACT:
A windmill is provided with a yawing device which includes two or more gear motors disposed about the periphery of a stationary tower toothed rim. Each gear motor has a driving wheel attached at an end thereof for engaging the toothed rim. By applying a suitable current to the gear motors, in equal and opposite directions, the mill can be held at an optimum position, relative to the wind, at a low power consumption. The use of multiple motors also provides optimum reliability with smooth and even yawing action.

REFERENCES:
patent: 2145511 (1939-01-01), Grohmann
patent: 2517135 (1950-08-01), Rudisill
patent: 3686608 (1972-08-01), Wahlberg
patent: 4408954 (1983-10-01), Earle
patent: 4435647 (1984-03-01), Harner et al.
patent: 4527072 (1985-07-01), Van Degeer
patent: 4557666 (1985-12-01), Baskin et al.
patent: 4585950 (1986-04-01), Lund
patent: 4692094 (1987-09-01), Kulinyak

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