Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables

doi:10.23919/CJEE.2022.000033

中国电气工程学报（英文） ›› 2022, Vol. 8 ›› Issue (4): 1-10.doi: 10.23919/CJEE.2022.000033

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收稿日期:2022-11-05 修回日期:2022-11-20 接受日期:2022-11-27 出版日期:2022-12-25 发布日期:2023-01-13

Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables

Zhedong Ma, Shuo Wang^*

Power Electronics and Electrical Power Research Lab, University of Florida, 32611 USA

Received:2022-11-05 Revised:2022-11-20 Accepted:2022-11-27 Online:2022-12-25 Published:2023-01-13
Contact: * E-mail: shuowang@ieee.org
About author:Zhedong Ma received the B.Eng. degree in Electrical Engineering and Automation from Zhejiang University, Hangzhou, China, in 2019. He is currently working toward the Ph.D. degree in Electrical and Computer Engineering at the University of Florida, Gainesville, FL, USA.
His research interests include electromagnetic interference/ compatibility (EMI/EMC) in power electronics systems, magnetic components, and wireless charging. He has authored and coauthored more than 16 IEEE journal and conference papers and holds one US patent pending since 2019.
Shuo Wang (Fellow, IEEE) received the Ph.D. degree in Electrical Engineering from Virginia Tech, Blacksburg, VA, USA, in 2005.
He is currently a Full Professor with the Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA. He has authored or coauthored more than 200 IEEE journal and conference papers and holds around 30 pending/issued U.S./international patents.
Dr. Wang was the recipient of the Best Transaction Paper Award from the IEEE Power Electronics Society in 2006 and two William M. Portnoy Awards for the papers published in the IEEE Industry Applications Society in 2004 and 2012, and the Distinguished Paper Award from the 2022 IEEE Symposium on Security and Privacy. In 2012, he was also the recipient of the National Science Foundation Career Award. He is currently an Associate Editor for the IEEE Transactions on Industry Applications and the IEEE Transactions on Electromagnetic Compatibility. He is the Chair of Power Electronics EMI/EMC Special Committee of IEEE EMC Society and an Instructor of IEEE Clayton Paul Global University. He was a Technical Program Co-Chair of the IEEE 2014 International Electric Vehicle Conference.

摘要/Abstract

Abstract: Recently, radiated electromagnetic interference (EMI) has become a research hotspot in power electronics systems, as the switching frequencies of power electronics systems have increased significantly with the adoption of wide-bandgap devices. In this article, a generalized radiated EMI model for power electronics converters with power cables is first reviewed. The radiated EMI model is then developed for a flyback power converter with critical ground impedance included. Based on the developed model, accurate high-frequency parameter extraction techniques and a radiated EMI prediction technique are developed and experimentally validated. Finally, essential measurement techniques are identified and developed to accurately extract parameters for accurate EMI prediction. The effects of the resolution bandwidth of the spectrum analyzer and critical PCB ground impedance on the radiated EMI are experimentally validated. PCB's impact on the common-mode (CM) choke's impedance and the radiated EMI is further validated. Techniques for minimizing the undesired near-field couplings in parameter extraction are discussed. The predicted EMI properly agreed with the measured EMI in the range of 30-230 MHz based on the EN55032 3 m class B standard.

Key words: Radiated electromagnetic interference, power converters, power cables, spectrum analyzer, resolution bandwidth

. [J]. 中国电气工程学报（英文）, 2022, 8(4): 1-10.

Zhedong Ma, Shuo Wang. Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables[J]. Chinese Journal of Electrical Engineering, 2022, 8(4): 1-10.

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Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables

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