一种新型的平面无源集成EMI滤波器结构

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Abstract In order to reduce the size of EMI filter and improve the power density of switch mode power supplies, a stacked-type interleaved planar passive integrated EMI filter structure is proposed in this paper. In this structure, the common-mode chokes, differential-mode inductors, common-mode capacitors and differential-mode capacitors are integrated into one unit. With this structure, the problem which large capacitor is hard to integrated is resolved, and the equivalent series resistance(ESR) and equivalent series inductance(ESL) of the integrated capacitor are minimized. The high-frequency common-mode equivalent circuit model is established taking into account the EPC of common-mode inductor and the ESL of common-mode capacitor and their ESR. The insertion loss formulas are deduced with “A” parameter matrix of two-port network. The simulation and prototypical experiment results are presented to show the effectiveness of the new integrated EMI filter structure and its high-frequency common-mode equivalent circuit model and insertion loss formulas.

Key words： EMI filter planar passive integration stacked-type interleaving insertion loss “ A” parameter matrix high frequency common-mode equivalent circuit model

Received: 26 July 2010 Published: 20 March 2014

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TN713

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	Yang Yugang
	Feng Bencheng
	Wang Changhua
	Li Hongzhu

Cite this article:

Yang Yugang,Feng Bencheng,Wang Changhua等. A Novel Structure of Planar Passive Integrated EMI Filter[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 108-113.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I8/108

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