基于容性参数等效的功率变换器系统电磁辐射预估方法及抑制措施

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

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Abstract

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.

Key words： Power converter radiated noise common-mode current finite element method (FEM) parasitic parameter

Received: 06 December 2019

PACS:

TM937

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	Zhang Kaiyan
	Wang Shishan
	Li Mengzi
	Guo Jing
	Yan Wei

Cite this article:

Zhang Kaiyan,Wang Shishan,Li Mengzi等. Method of Electromagnetic Radiation Prediction and Suppression Based on Capacitance Parameter Equivalence in Power Converter System[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 235-247.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191699 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I2/235

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