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As the core component of electric vehicles, the electromagnetic compatibility (EMC) of the motor controller (MCU) is crucial. This article conducts in-depth research on the EMC issues of motor controller. Through a detailed analysis of the electromagnetic interference (EMI) mechanism of MCU, the sources and propagation pathways of EMI are clarified. Combined with the basic principles of EMC analysis, three EMC design and optimization schemes are proposed, including suppressing interference sources, suppressing propagation pathways, and protecting sensitive equipment. In response to the issue of electromagnetic field emission exceeding the standard of a certain four-wheel drive electric vehicle, optimization measures such as shielding, grounding, and filtering were applied to suppress the propagation path. As a result, the electromagnetic field emission intensity of the sample vehicle was significantly reduced, and it passed the test of GB/T 18387-2017, verifying the effectiveness of the optimization measures. The research results of this article are of great significance for improving the EMC of electric vehicle MCU and ensuring stable and reliable operation of electric vehicles.

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Research on Electromagnetic Compatibility of Electric Vehicle Motor Controller

  • 会议论文

  • 发表日期：

    2026年

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  • Xia Zeng,
  • Song Mao,
  • Xiaojiao Li,
  • Xuemei Huang,
  • Juan Cheng,
  • Qiao Lin,
  • Hui Chen,
  • Jinbo Feng

摘要

As the core component of electric vehicles, the electromagnetic compatibility (EMC) of the motor controller (MCU) is crucial. This article conducts in-depth research on the EMC issues of motor controller. Through a detailed analysis of the electromagnetic interference (EMI) mechanism of MCU, the sources and propagation pathways of EMI are clarified. Combined with the basic principles of EMC analysis, three EMC design and optimization schemes are proposed, including suppressing interference sources, suppressing propagation pathways, and protecting sensitive equipment. In response to the issue of electromagnetic field emission exceeding the standard of a certain four-wheel drive electric vehicle, optimization measures such as shielding, grounding, and filtering were applied to suppress the propagation path. As a result, the electromagnetic field emission intensity of the sample vehicle was significantly reduced, and it passed the test of GB/T 18387-2017, verifying the effectiveness of the optimization measures. The research results of this article are of great significance for improving the EMC of electric vehicle MCU and ensuring stable and reliable operation of electric vehicles.