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<p>To reduce the cogging torque of interior permanent magnet synchronous motors (IPMSMs), the double semi-circular auxiliary slots (DSAS) topology and its optimization method are proposed to optimize the rotor in this paper. First, the mechanism of cogging torque generation is theoretically analyzed to establish a perturbation model of the auxiliary slot arc angles and depths. Second, based on the auxiliary slot model, the optimization method of DSAS is proposed and verified through controlled variable analysis. A finite element analysis (FEA) model of a 6-pole 36-slot V-shaped IPMSM is developed. The motor cogging torque is compared before and after rotor slotting implementation. A comparative analysis of the performance parameters is further conducted between the optimized DSAS and motors with different auxiliary slot topologies. Experimental and simulation results show that the optimized DSAS topology can reduce the cogging torque up to 82.2%, which verifies the effectiveness and feasibility of the method proposed in this paper.</p>

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Optimization and performance analysis of double semi-circular auxiliary slots for permanent magnet synchronous machine

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Yuxi Gu,
  • Luyao Shi,
  • Lihua Zhu,
  • Xiaoning Li,
  • Jinliang Yin,
  • Enhong Xing

摘要

To reduce the cogging torque of interior permanent magnet synchronous motors (IPMSMs), the double semi-circular auxiliary slots (DSAS) topology and its optimization method are proposed to optimize the rotor in this paper. First, the mechanism of cogging torque generation is theoretically analyzed to establish a perturbation model of the auxiliary slot arc angles and depths. Second, based on the auxiliary slot model, the optimization method of DSAS is proposed and verified through controlled variable analysis. A finite element analysis (FEA) model of a 6-pole 36-slot V-shaped IPMSM is developed. The motor cogging torque is compared before and after rotor slotting implementation. A comparative analysis of the performance parameters is further conducted between the optimized DSAS and motors with different auxiliary slot topologies. Experimental and simulation results show that the optimized DSAS topology can reduce the cogging torque up to 82.2%, which verifies the effectiveness and feasibility of the method proposed in this paper.