Analysis and control of a novel bearingless switched reluctance motor with hybrid stator poles

In this paper, a novel bearingless switched reluctance motor (BLSRM) with hybrid stator poles is proposed. The proposed BLSRM has short flux path and no flux reversal characteristics, and separated torque and suspending force control. The characteristics of the proposed structure are analyzed by finite element method. The analysis results show that the torque control can be decoupled from the suspending force control and the output torque is significantly improved when compared to the 8/10 hybrid stator pole type BLSRM. To verify the validity of the proposed structure, a prototype of the proposed BLSRM is designed and manufactured. Meanwhile, a control scheme is proposed based on the novel structure. In the scheme, a simple PID and hysteresis current control methods are employed. The validity of the proposed structure and its control scheme are verified by the experimental results.