Abstract
In order to reduce the cogging torque without loss of the torque density, a novel permanent magnet synchronous motor (PMSM) with special design of magnet pole is proposed in this paper. The influence of each single key parameter of the novel rotor structure on the static torque characteristics of PMSM analyzed in this paper. Based on amounts of parametric finite element analysis (FEA), the Kriging surrogate model of the cogging torque and average torque are built to investigate the effect of multiple parameters on torque performance in details. The non-dominated sorting genetic algorithm II (NSGA II) is further employed to optimize the proposed PMSM based on the obtained surrogate model. The FEA is carried out to evaluate and verify the superiority in torque performance of the proposed PMSM.
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