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This paper deeply discusses the application of 180° square wave back EMF permanent magnet motor based on pulse broadband modulation (PAM) control in new energy vehicles, because when the motor is running at high speed, the AC loss will not be negligible, and the stepped current can theoretically effectively reduce or even no AC loss, compared with the traditional PMSM, the electromagnetic output power of the square wave motor is higher. In the permanent magnet motor, the brushless DC motor (BLDCM) has no AC loss, but the utilization rate of the DC bus is low, and the permanent magnet synchronous motor (PMSM) is the opposite, so this paper combines the advantages of the two motors to build a square wave motor. The simulation results show that the mathematical model of the motor realizes the square wave electromotive force and stepped current under PAM modulation, and the electromagnetic output power is higher than that of the traditional PMSM, and the speed curve of the motor responds faster and better.

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Research on PAM Modulation Technology for High Power Density Permanent Magnet Motors

  • 会议论文

  • 发表日期：

    2025年

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  • Qingbo Guo,
  • Jifan Mao,
  • Fuchuang Chen,
  • Wenjun Qi

摘要

This paper deeply discusses the application of 180° square wave back EMF permanent magnet motor based on pulse broadband modulation (PAM) control in new energy vehicles, because when the motor is running at high speed, the AC loss will not be negligible, and the stepped current can theoretically effectively reduce or even no AC loss, compared with the traditional PMSM, the electromagnetic output power of the square wave motor is higher. In the permanent magnet motor, the brushless DC motor (BLDCM) has no AC loss, but the utilization rate of the DC bus is low, and the permanent magnet synchronous motor (PMSM) is the opposite, so this paper combines the advantages of the two motors to build a square wave motor. The simulation results show that the mathematical model of the motor realizes the square wave electromotive force and stepped current under PAM modulation, and the electromagnetic output power is higher than that of the traditional PMSM, and the speed curve of the motor responds faster and better.