基于MTLs弱耦合串扰模型的开关电源传导发射

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Abstract Due to the effect of crosstalk coupling, switching power supplies with input lines and output lines closely show that high frequency conducted noises in both lines couple seriously, and it goes against electromagnetic interference (EMI) filter design. The switching power supply with input and output lines on the same side is investigated. Based on multiconductor transmission lines (MTLs) theory and weak-coupling crosstalk model, common mode (CM) noise current propagation paths are analyzed. In addition, the crosstalk model and per-unit-length parameters between input and output lines are presented. Simulation and experiment results indicate the change of output line conducted noise may influence the test result of input line. One improvement method is proposed responsibly to conducted emission.

Key words： Multiconductor transmission lines EMI filter CM noise switching power supply conducted emission

Received: 21 March 2009 Published: 04 March 2014

PACS:

TN811

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	Articles by authors
	Lian Yuxin
	Li Haoyu
	Wu Jianqiang
	Yang Shiyan

Cite this article:

Lian Yuxin,Li Haoyu,Wu Jianqiang等. Conducted EMI of Switching Power Supply Based on MTLs Weak-Coupling Crosstalk Model[J]. Transactions of China Electrotechnical Society, 2010, 25(9): 1-7.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2010/V25/I9/1

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