基于积木式交错并联的平面全集成EMI滤波器

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Abstract In order to reduce the size of filter and improve the power density of switch and power supplies, a passive integrated EMI filter structure based on planar stacked-type interleaved parallel connection is proposed in the paper. According to frequency range distributed rule of differential mode noise and common mode noise, film medium materials with higher stability of temperature is interleaved to realize the integration of common mode capacitance. In order to realize the integration of differential-mode capacitance, the Ⅱkind ceramic material X7R with higher stability of electric property is used. The PCB winding is used to realize the integration of common-mode inductor and differential mode the inductance. The equivalent circuits of common-mode and differential-mode in high-frequency modeling of this EMI filter are given, furthermore, the calculated formulas of insertion loss are deduced. The results of simulation and experiment verify the effectiveness of planar completely integrated EMI filter, and the correctness of the equivalent circuits of high frequency differential-mode, common-mode and the formulas of insertion loss.

Key words： Planar completely integrated EMI filter stacked-type interleaved connected insertion loss high frequency differential/common-mode equivalent circuit Ⅱkind ceramic materials X7R

Received: 02 November 2010 Published: 20 March 2014

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TM46

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	Articles by authors
	Yang Yugang
	Na Xin
	Wang Changhua
	Feng Bencheng

Cite this article:

Yang Yugang,Na Xin,Wang Changhua等. Planar Completely Integrated EMI Filter Based on Stacked-Type Interleaved Connection[J]. Transactions of China Electrotechnical Society, 2012, 27(3): 181-187.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I3/181

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