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2024 2nd China Power Supply Society Electromagnetic Compatibility Conference (CPEMC)

Analysis of the Influence of Parasitic Capacitances on Common-Mode EMI in Double Sided Cooling Power Modules

Year: 2024, Pages: 20-25

Authors

Sijia Liu, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Yifan Zhang, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Yiyang Yan, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Jianwei Lv, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Heng Zhang, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Zexiang Zheng, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Cai Chen, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Yong Kang, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Jiaxin Liu, Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Wuhan,China  
Qiaopo Xiong, Wuhan Ship Communication Research Institute,Hubei Key Laboratory of Low Frequency Electromagnetic Communication Technology,Wuhan,China  
Wei Liu, Wuhan Ship Communication Research Institute,Hubei Key Laboratory of Low Frequency Electromagnetic Communication Technology,Wuhan,China
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Abstract

This paper investigates the power module design for better common-mode (CM) EMI performance in a double sided cooling power module. The effect of parasitic capacitance on CM EMI is analyzed by using the CM equivalent model. To verify the analysis, a comparative study is conducted between a popular double sided cooling power module and a commercial wire bonded power module. The parasitic extraction results of ANSYS Q3D show that the double sided cooling power module faces more serve CM EMI issues due to the larger output-side capacitance. Simulation results also show that reasonable parasitic values and parameter symmetry can improve CM EMI performance. Based on the above studies, a design guidance of the double sided cooling power module are given for better CM EMI.
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