Unbalance Vibration Suppression of Maglev High-Speed Motor Based on the Least-Mean-Square

The harmonic response caused by unbalanced excitation vibration for the high-speed rotating machinery will reduce control accuracy and stability of maglev motor, limit increase its speed. When active magnetic bearing is used to solve vibration, it additional electromagnetic force energy consumption, sometimes leading saturation power amplifier, transfer foundation, causing foundation vibrate. In this paper, we analyzed periodic unbalance principle rotor suppression, model derived. Least-Mean-Square (LMS) algorithm introduced into PID control, an strategy based on real-time filtering compensation displacement signal proposed, eliminated synchronous frequency input control. experimental results show that proposed method can improve rotor’s rotation accuracy, bearing’s maximum current, decrease supporting foundation.