Efficient design method of EMI filter based on noise source impedance extraction

被引：0

作者：

Cui W.-L. ^{[1
]}

Mao X.-K. ^{[1
,3
]}

Peng J.-R. ^{[2
]}

Zhang Y.-M. ^{[1
,3
]}

Dong J.-Q. ^{[1
]}

机构：

[1] College of Electrical Engineering and Automation, Fuzhou University, Fuzhou

[2] State Grid Jinjiang Electric Power Co., Ltd., Fujian Power Supply Company, Jinjiang

[3] Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2023年 / 27卷 / 03期

关键词：

electromagnetic interference; EMI filter; impedance mismatch principle; insertion loss; noise source impedance; passive two-port network;

D O I：

10.15938/j.emc.2023.03.008

中图分类号：

学科分类号：

摘要：

For the problems of inaccurate single design and long design cycle caused by multiple design debugging in the traditional EMI filter design method, a new method for efficient design of EMI filter based on impedance extraction from noise source was proposed. Firstly, in the new method the impedance amplitude and phase of the noise source was obtained accurately and quickly by inserting the passive two-port network. Secondly, the EMI filter topology was selected according to the impedance mismatch principle; then it was comprehensively considered the noise source impedance, the equivalent load impedance at the LISN end and the influence of the high-frequency distribution parameters of the EMI filter on the insertion loss of the filter, so that the theoretical insertion loss of the filter is equal to the insertion loss required in the conducted EMI test band range, and the accurate parameters of each component of the filter were obtained, and the accurate design of the EMI filter was realized. Finally, an LED drive power supply was used for the experiment, the experimental results show that the proposed method can meet the expected effect in one design, which verifies accuracy and efficiency of the proposed method. © 2023 Editorial Department of Electric Machines and Control. All rights reserved.

引用

页码：79 / 91

页数：12

共 27 条

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