汽车工程 ›› 2020, Vol. 42 ›› Issue (7): 949-955.doi: 10.19562/j.chinasae.qcgc.2020.07.015

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基于模型的电动车低频辐射发射改进技术*

王子龙1, 高锋2, 熊禹3   

  1. 1.中国汽车技术研究中心,天津 300300;
    2.重庆大学汽车工程学院,重庆 400044;
    3.东风柳州汽车有限公司,柳州 545005
  • 收稿日期:2019-07-24 出版日期:2020-07-25 发布日期:2020-08-14
  • 通讯作者: 高锋,教授,博士,E-mail:gaofeng1@cqu.edu.cn。
  • 基金资助:
    *国家重点研发计划(2017YFB0102504)和重庆市科技计划(cstc2017zdcy-zdzx0042)资助。

Model-based Modification Technique of Low-frequency Radiation Emission in Electric Vehicle

Wang Zilong1, Gao Feng2, Xiong Yu3   

  1. 1. China Automotive Technology & Research Center, Tianjin 300300;
    2. School of Automotive Engineering, Chongqing University, Chongqing 400044;
    3. Dongfeng Liuzhou Motor Co., Ltd., Liuzhou 545005
  • Received:2019-07-24 Online:2020-07-25 Published:2020-08-14

摘要: 电动汽车的高电压、大电流特性使其整车辐射发射,或说是电磁干扰(EMI)问题突出,而实验改进方法存在定位难、耗时长、投入大等问题。为提高整车EMI问题改进的效率,本文中提出了一种基于模型的问题分析定位和改进方法。根据目标车型的屏蔽水平将整车分解为多个系统单独建模,降低建模难度。根据端口连接关系构造拓扑矩阵,实现整车EMI预测。在对模型精度进行验证基础上,通过灵敏度和贡献度的综合分析定位EMI干扰源,并选择EMI滤波器,使目标车型达到GB 18387《电动车辆的电磁场发射强度的限值和测量方法》的要求。

关键词: 电动车, 电磁干扰, 辐射发射

Abstract: Radiated emission, or electromagnetic interference (EMI) is a prominent problem of electric vehicle due to its high voltage and large current of power system, and it is hard in source location, high in cost and time-consuming when using experiment technique for modification and improvement. To enhance the efficiency of EMI issue improvement, a model-based approach for the analysis, location and modification of EMI issue is proposed. According to the shielding level of target vehicle, the vehicle is divided into multiple subsystems for separated modelling with less difficulty. Then a topology matrix is constructed based on the relationship of port connections to predict the EMI level of vehicle. After the validation of model accuracy, a comprehensive analysis on sensitivity and contribution is conducted to locate the source of EMI with the EMI filter selected, so as for the target vehicle to meet the requirements of GB 18387.

Key words: electric vehicle, electromagnetic interference, radiated emission