中国电机工程学报2025，Vol.45Issue(7)：2779-2790,中插28,13.DOI:10.13334/j.0258-8013.pcsee.240191
栅极驱动电路的传导共模电磁干扰特征分析
Characterization of Conducted Common-mode EMI in Gate Driver
摘要
Abstract
The gate driver,serving as the bridge connecting low-voltage control circuit and high-voltage power circuit,ensures the reliable switching of power electronic devices,but it also suffers from intense electromagnetic interference(EMI).Existing researches on conducted EMI in gate drivers focus on differential-mode(DM)interference represented by"crosstalk",while lacking in in-depth analysis of common-mode(CM)interference.CM interference is the major interference source for gate drivers because of its numerous propagation paths,wide frequency range and extensive influence.To address the limitations of existing researches,this paper concentrates on the high-frequency(HF)characteristics and analyzes the CM interference characteristics of gate drivers.Focusing on switching voltage overshoot and HF oscillations,trapezoidal waveform with attenuated sinusoidal waveform is used to model the interference source.Based on the converter and gate driver architecture,the multi-branch coupling network of CM interference is built layer by layer and its wide-band impedance characteristics are analyzed.The CM current and the drive signal interference voltage are selected as the targets,whose transfer functions are solved and the failure mechanisms are analyzed in conjunction with the source characteristics.Experimental results show that the HF oscillation of the source will generate serious interference.When the oscillation frequency of the source is the same as the resonance frequency of the coupling network,the CM interference will be enlarged.Extra attention needs to be paid in the gate driver design.This paper concludes with a guide to the anti-jamming design of gate drivers at the theoretical level based on the EMI model developed.关键词
栅极驱动电路/传导电磁干扰/共模干扰Key words
gate driver/conducted electromagnetic interference(EMI)/common-mode(CM)interference分类
信息技术与安全科学引用本文复制引用
岳乔治,彭晗,童乔凌,康勇..栅极驱动电路的传导共模电磁干扰特征分析[J].中国电机工程学报,2025,45(7):2779-2790,中插28,13.基金项目
国家重点研发计划项目(2021YFB2401600).National Key R&D Program of China(2021YFB2401600). （2021YFB2401600）
