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This paper proposes an 18/15/8-pole bearingless switched reluctance motor (BSRM) with good decoupling performance, which optimizes the distance and number of teeth between the inner and outer stator and rotor, reduces the hysteresis force existing during phase change, improves the electromagnetic conversion efficiency, and reduces the interference of forces between torque and levitation. A three-layer rotor structure is used to design the magnetic separation frame, which eliminates the interference of magnetic lines between the torque system and the suspension system. The direct control idea is applied to control the torque and levitation forces. A new reaching law (RL) is proposed, and a torque sliding mode controller and a suspension force sliding mode controller are designed, which replace the traditional terminal sliding mode control and PID control, and improve the robustness of the control system and dynamic response. Ansoft Maxwell 2D software is used to perform electromagnetic analysis to verify the decoupling, and the control simulation model is established by MATLAB/Simulink simulation analysis, and the results are compared with the traditional controller method. The results show that the proposed control system effectively improves the dynamic response speed and robustness of the system, and verifies the effectiveness and superiority of the proposed control method.

Design and Terminal Sliding Mode Control of Double Stator Bearingless Switched Reluctance Motor