Method of Electromagnetic Radiation Prediction and Suppression Based on Capacitance Parameter Equivalence in Power Converter System

被引：0

作者：

Zhang K. ^{[1
]}

Wang S. ^{[1
]}

Li M. ^{[1
]}

Guo J. ^{[1
]}

Yan W. ^{[2
]}

机构：

[1] College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

[2] College of Electrical and Automation Engineering, Nanjing Normal University, Nanjing

来源：

Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 02期

关键词：

Common-mode current; Finite element method (FEM); Parasitic parameter; Power converter; Radiated noise;

D O I：

10.19595/j.cnki.1000-6753.tces.191699

中图分类号：

学科分类号：

摘要：

Electromagnetic radiation interferes with electrical and electronic equipment in the form of electromagnetic wave in space, which is one of the key issues in research area of EMC. In view of the complexity of far-field radiation of power converter system (PCS), this paper takes the common-mode (CM) current as the main noise source, and transmits through parasitic capacitance between input cables and ground, thus CM current path model (CCP) is established. Moreover, CCP is formed as equivalent prediction model of radiation (EMR) by appropriate simplification. The parasitic capacitance of EMR and PCS is extracted by finite element method (FEM), and then geometric parameter of EMR is obtained by iterative design. The EMR is fed by signal generator to simulate radiation emission of PCS. Furthermore, PCS and EMR are tested in the anechoic chamber, and the radiation emission of two models is in good agreement, thereby verifying the feasibility of the method. At last, the scattering parameters are used to evaluate the effect of electromagnetic noise suppression. On this basis, the ferrite magnetic ring is selected to change scattering parameter matrix, and electromagnetic radiation can be suppressed. The recommended installation of magnetic ring is given that makes converter pass the GB 9254 ClassB test standard. © 2021, Electrical Technology Press Co. Ltd. All right reserved.

引用

页码：235 / 247

页数：12

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