Modeling and Prediction of Electromagnetic Interference in SiC Motor Drive Systems
Duan Zhuolin1, Zhang Dong2,3,4, Fan Tao2,3,4
1. Beijing Space Launch Institute Beijing 100076 China; 2. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100049 China; 3. Key Laboratory of Power Electronics and Electric Drive Chinese Academy of Sciences Beijing 100190 China; 4. Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100190 China
Abstract：In SiC power device based motor drive systems,due to high dv/dt and di/dt of SiC devices,non-ignorable oscillations are produced,thus the traditional conducted EMI circuit models are no longer suitable.In this paper,a new conducted EMI equivalent circuit modeling and prediction method of the SiC motor drive system is proposed.Firstly,a linear time-invariant equivalent circuit model of the SiC motor drive system was built by taking the effects of circuit parasitic parameters into account.It is proved that,to accurately predict the system conducted EMI level,both EMI produced by power device current and voltage as EMI sources must be calculated.Then,the differential-mode (DM) and common-mode (CM) EMI equivalent circuits were built.After that,each component equivalent circuit was built,and the parameters were calculated based on the tested motor drive system.Finally,EMI level at the power port was predicted based on the equivalent circuits.The calculation results were compared with the experimental results,which verified the built model.Moreover,it is proved that the proposed method improves the accuracy of DM EMI calculation in high frequency range.
段卓琳, 张栋, 范涛. SiC电机驱动系统传导电磁干扰建模及预测[J]. 电工技术学报, 2020, 35(22): 4726-4738.
Duan Zhuolin, Zhang Dong, Fan Tao. Modeling and Prediction of Electromagnetic Interference in SiC Motor Drive Systems. Transactions of China Electrotechnical Society, 2020, 35(22): 4726-4738.
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2020, Vol. 35 
