采用端口阻抗测试的车载充电机传导电磁干扰建模方法研究  

Research on Modelling of Conducted Electromagnetic Interference in On-Board Chargers Using Port Impedance Testing

作　　者：李季风 耿宇宇 贾晋 廖兴林 路青洋 LI Jifeng;GENG Yuyu;JIA Jin;LIAO Xinglin;LU Qingyang(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China;MOE Key Laboratory of Advanced Manufacturing Technology for Automotive Parts,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《西安交通大学学报》2025年第1期172-182,共11页Journal of Xi'an Jiaotong University

基　　金：重庆市自然科学基金资助项目(CSTB2023NSCQ-MSX0261);重庆理工大学国家自然科学基金项目培育计划(2022PYZ015)。

摘　　要：针对电动汽车车载充电机的设计过程中普遍存在的电磁干扰频率范围广、干扰源复杂的问题,提出了一种基于端口阻抗测试的等效电路建模和系统级协同仿真方法。首先,通过对车载充电机系统各部件进行阻抗测试和三维电磁仿真,建立了无源器件、端口滤波器和高压屏蔽线缆模型,提取了系统印制电路板关键回路的高频寄生参数。其次,建立了有源器件的仿真电路模拟器等效模型,并通过双脉冲实验验证模型的精度;针对功率因数校正电路控制环节的仿真与建模难以同步实现的问题,采用协同建模的方法构建整个系统的等效电路模型。最后,将各部件模型组合在一起,建立了完整的车载充电机系统传导电磁干扰预测模型,并依据相关测试标准进行了系统传导电磁干扰仿真和实验。结果表明:在150 kHz~30 MHz频率范围内,预测结果与实际结果的误差小于9 dB,具有良好的一致性,表明该模型能够精确预测车载充电机系统高压交流端的传导干扰水平,可以有效指导充电机系统的电磁兼容正向设计。In response to the prevalent challenges of the wide frequency ranges and complexity of electromagnetic interference(EMI)sources during the design process of electric vehicle onboard chargers,a method based on port impedance testing for equivalent circuit modeling and system-level collaborative simulation is introduced.Initially,impedance testing and three-dimensional electromagnetic simulations are performed on various components of the on-board charger system to develop models for passive devices,port filters,and high-voltage shielded cables,extracting high-frequency parasitic parameters from key printed circuit board.Subsequently,simulation program with integrated circuit equivalent models for active devices are established and validated for accuracy through double pulse experiments.To address the challenge of synchronizing simulation and modeling in the power factor correction circuit’s control loop,a co-modeling approach is employed to build the equivalent circuit model of the entire system.Finally,the individual component models are integrated to develop a comprehensive conducted EMI prediction model for the on-board charger system.Simulations and experiments are performed in accordance with relevant testing standards.The results reveal that within the 150 kHz to 30 MHz frequency range,the prediction accuracy deviates by less than 9 dB from the actual results,indicating strong consistency.This suggests that the model can accurately predict the conducted interference levels at the high-voltage AC side of the on-board charger system,thereby offering valuable insights for electromagnetic compatibility design.

关 键 词：车载充电机 电磁干扰 端口阻抗测试 协同仿真 

分 类 号：U469.72[机械工程—车辆工程]