Abstract
In order to solve the control coupling between torque and suspension force of bearingless switched reluctance motor (BSRM), a novel 24-phase BSRM with segment hybrid rotor teeth is presented. The rotor teeth are divided into 3 torque teeth and 3 suspension teeth, by adopting short circuit excitation, the flux linkage coupling is eliminated, and the separate control of torque and suspension force is achieved. The coupling degree is further reduced by using non-magnetic material as support part. The pole arc of suspension teeth is increased to keep the inductance of suspension windings constant, which eliminates the effect on the output torque when the suspension force is regulated. The decoupling performance of the proposed 24-phase BSRM is analyzed by Ansys Maxwell, and the results show that the proposed structure has basically achieved the decoupling control between torque and suspension force.
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