Development of Active Magnetic Bearing System Using Adaptive Feedforward Cancellation for Compensation and Analysis of External Forces in Rotating Machinery

In this research, a rotor system using active magnetic bearing has been proposed to analyze for external forces in rotating machineries. Dynamics of the rotating machineries are influenced from the various external forces such as unbalanced forces, oil film forces at a journal bearing, and seal contact forces. The characteristics of the external forces are dependent on rotating speed and rotating orbit of the rotating shaft. In development the rotating machineries, the analysis of the characteristics of external forces is required under various rotating condition. The proposed system can compensate and analyze for the external forces by using the adaptive feed-forward cancellation (AFC). By using AFC, the proposed system can realize the desired rotating conditions under acting the external forces and analyze the characteristics external forces. The effectiveness of the proposed system has been confirmed experimentally.