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The common mode (CM) noise of a Boost converter is mainly caused by the displacement current and parasitic capacitance passing through high dv/dt nodes in the circuit, which may cause electromagnetic interference to surrounding equipment. In order to reduce the size of EMI filters, measures need to be taken to reduce CM noise of the Boost converter. This paper analyzes the suppression methods of CM noise in Boost converters, mainly summarizing the working principles of various measures from the perspective of main circuit topology optimization, and simulating and analyzing the key parameters that affect CM noise suppression effect, providing reference for the further development and practical application of suppression methods.

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Research on Parameter Sensitivity of CM Noise Suppression Measures for Boost Converter Based on Topology Optimization

  • 会议论文

  • 发表日期：

    2025年

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  • Hongxin Mei,
  • Fanghua Zhang,
  • Yu Zhu,
  • Sijia Xu

摘要

The common mode (CM) noise of a Boost converter is mainly caused by the displacement current and parasitic capacitance passing through high dv/dt nodes in the circuit, which may cause electromagnetic interference to surrounding equipment. In order to reduce the size of EMI filters, measures need to be taken to reduce CM noise of the Boost converter. This paper analyzes the suppression methods of CM noise in Boost converters, mainly summarizing the working principles of various measures from the perspective of main circuit topology optimization, and simulating and analyzing the key parameters that affect CM noise suppression effect, providing reference for the further development and practical application of suppression methods.