Analysis and Control of A Novel Bearingless Switched Reluctance Motor with Wider Rotor Teeth

A novel single-winding bearingless switched reluctance motor with wider rotor teeth (BSRMWRW) is proposed in this article, which can realize the decoupled control of torque and levitation force and thus simplify the motor's control in the starter/generator system. First, the working principles and decoupling characteristic of BSRMWR are explained; Second, the mathematical model of torque and levitation force is derived based on the Maxwell stress tensor method. The model's accuracy is further verified by the finite element analysis (FEA); Based on this model, the square-current control method is proposed with average torque oriented. In addition, the proposed suspension control strategy not only reduces the number of system variables but also eliminate the coupling of levitation forces in X and Y directions. Finally, the simulation of single-winding BSRMWR is carried out in Matlab/Simulink.