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摘要
The cogging torque ripple of surface mounted permanent magnet motor can be reduced by opening auxiliary slots on the rotor. However, the analyses are mainly based on the finite element method, which requires repeated modification of the parameters of the model, and there is no clear method to optimize the geometry. In this paper, taking the scalar magnetic potential as variable, the Laplace and Quasi Poisson equations were established in the air gap and permanent magnet region respectively. For the irregular shape of magnet, an analytical model of surface-mounted permanent magnet motor with auxiliary slots in the rotor was proposed based on the principle of superposition. Then, the relationship between the peak cogging torque and the auxiliary slot size was derived. The auxiliary slot size was optimized and the cogging torque was minimized. Finally, the finite element method was used to validate the presented analytical model. ? 2021, Harbin University of Science and Technology Publication. All right reserved.
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