Research on Active Yaw Mechanism of Small Wind Turbines

This paper presents the development process of an active yaw mechanism for small wind turbine with a power of 5kw or more, which contributes to avoid wind turbines turning frequently. In this mechanism, roller bearings make a revolute joint, a DC-motor provides power for yawing and combines a self-locking worm and a reducer to give system a big transmission ratio, which give this mechanism a low yaw angular velocity and make it yaw steady and accurately. This paper is of guiding significant to improve yaw stability and accuracy, extend the working life and enhance the wind power generation efficiency. (C) 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of International Materials Science Society.