Abstract
High-speed permanent magnet (HSPM) machines need higher power density with the department of electrification. In order to obtain higher torque density, HSPM machines have been operated under high electromagnetic load. Meanwhile, the selection of materials with different properties can greatly influence the performance of the high power density HSPM machines. In this paper, the influence of different combinations of stator core and rotor PM material on the performance of a high-speed PM machine is compared and analyzed. The electromagnetic performance of the machines including air-gap flux density, back-EMF, electromagnetic torque and loss distribution, and mechanical performance of PM and rotor sleeve are obtained using finite element analysis, and some conclusions are drawn based on the comparison results.
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