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Design of Bearingless Flux-Switching Permanent-Magnet Motor

In this paper, a novel E-core bearingless flux-switching permanent-magnet (BFSPM) motor is presented to overcome the shortcomings of rotor permanent-magnet-type bearingless motors. The basic structure and the operation principle are first described. In addition, the mathematical models of radial suspension forces and torque are deduced. Finally, based on the finite-element analysis, the optimization design of the 6/10 E-core BFSPM motor has been proposed to reduce torque ripple and increase suspension forces. The research results show that the torque ripple is significantly reduced by around 34%, whereas the suspension forces of the E-core BFSPM motor are increased by around 4% with the optimized parameters.