Abstract

This paper designs a windage loss and torque ripple (or cogging torque) reduction rotor for stator-permanent magnet flux-switching (SPM-FS) machines. By modifying the rotor teeth shape, and the use of ribs to connect the rotor teeth. The torque ripple (or cogging torque) can be reduced by about 89.12%, and the windage loss is reduced by about 66.19%. Additionally, the quasi-cylindrical shape of the proposed rotor makes the air in the air gap still maintain high heat dissipation capacity, and also reserves buffer space for radial deformation of the ribs. Mises stress analysis and deformation analysis also verified the mechanical reliability of the proposed rotor. This paper can also provide an important reference for direct-drive servo and high-speed application of SPM-FS machines.

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