| 摘要 |
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.
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