SPEED REDUCER FOR USE IN YAW DRIVE APPARATUS FOR WIND POWER GENERATION APPARATUS, AND YAW DRIVE METHOD AND APPARATUS FOR WIND POWER GENERATION APPARATUS USING THE SPEED REDUCER

摘要

A yaw drive method of a wind power generation apparatus, in which a second gear engaged with a first gear attached to one of tower or a wind power generation unit supported to the upper end of the tower so as to be capable of yawing and supported to a tower or to the upper end of the tower is rotated by a drive motor attached to the other of the tower or the wind power generation unit for yawing the wind power generation unit. A drive energy, which is supplied to the drive motor for a predetermined time from when the supply of the drive energy to the drive motor begins to start, is made to be smaller than the drive energy supplied to the drive motor in a common yawing.