Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
Zero-power controlled active magnetic bearing has been proposed in order to energy saving. The magnetic bearing consists of electromagnets with permanent magnet. The electromagnets are mounted on a frame suspended by springs. Using simple zero-power control for levitation, stationary current becomes zero even though a force acts on the rotor. While the rotor moves relative to the frame in the opposite direction to the force, the frame moves same direction as the force. Therefore, the absolute rotor position is maintained with low energy. However, the absolute position and the current fluctuate due to unbalance force at low speed rotation. While another control method has been proposed to regulate the fluctuation, the regulation effect is insufficient at high speed rotation. In this report, the switching method of control system depending on the rotational speed is proposed to obtain high performance at both low and high speed rotation.
