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<p>The partitioned stator flux switching permanent magnet (PS-FSPM) machine employs two separate stators to accommodate armature windings and alternately magnetized PMs, respectively, which address the challenge of internal space competition. However, previous studies have shown that PS-FSPM machine often suffer from higher PM usage. In this paper, a novel topology of the PS-FSPM machine is proposed to improve the utilization of PMs and the electromagnetic performance. The radially magnetized PM is arranged between two alternately magnetized PMs to form a U-PM structure, and the connected flux bridge under U-PM provides a magnetic circuit for the harmonic working magnetic field, which effectively improves the electromagnetic performance. Then, the machine is optimized based on response surface method (RSM) and the optimal value of key design parameters of the machine is obtained based on multi-objective genetic algorithm (MOGA). Finally, based on two-dimensional finite element analysis, the electromagnetic field of the machine was calculated. The results show that compared to conventional machines, the proposed machine reduces the usage of PMs by 5.7%, while increasing the EMF amplitude to 177.17&#xa0;V with a distortion rate of only 1.18%, indicating superior back EMF performance. The output torque is improved from 21.31&#xa0;N·m to 23.20&#xa0;N·m, with torque ripple reduced to 3.30%. Additionally, the proposed machine maintains a high-power factor and good thermal performance.</p>

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A U-PM Partitioned Stator Flux Switching Machine with Flux Bridge

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Zeyu Min,
  • Libing Jing,
  • Tao Wang

摘要

The partitioned stator flux switching permanent magnet (PS-FSPM) machine employs two separate stators to accommodate armature windings and alternately magnetized PMs, respectively, which address the challenge of internal space competition. However, previous studies have shown that PS-FSPM machine often suffer from higher PM usage. In this paper, a novel topology of the PS-FSPM machine is proposed to improve the utilization of PMs and the electromagnetic performance. The radially magnetized PM is arranged between two alternately magnetized PMs to form a U-PM structure, and the connected flux bridge under U-PM provides a magnetic circuit for the harmonic working magnetic field, which effectively improves the electromagnetic performance. Then, the machine is optimized based on response surface method (RSM) and the optimal value of key design parameters of the machine is obtained based on multi-objective genetic algorithm (MOGA). Finally, based on two-dimensional finite element analysis, the electromagnetic field of the machine was calculated. The results show that compared to conventional machines, the proposed machine reduces the usage of PMs by 5.7%, while increasing the EMF amplitude to 177.17 V with a distortion rate of only 1.18%, indicating superior back EMF performance. The output torque is improved from 21.31 N·m to 23.20 N·m, with torque ripple reduced to 3.30%. Additionally, the proposed machine maintains a high-power factor and good thermal performance.