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An Improved Design of Conducted EMI Signal Suppression in SMPS

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Abstract:

The conducted EMI problem caused by grounding net impedance has attracted more and more attention in resent years. In this paper, a model of interference system including parasitic capacitance was built. The theoretical feasibility of the measure and the mechanism of the conducted EMI caused by grounding loop were discussed. An improved design of conducted EMI suppression was proposed. Finally, a 100W (20V5A) SMPS was built to verify the effectiveness of this theory and the experimental results were also demonstrated.

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Periodical:

Applied Mechanics and Materials (Volumes 239-240)

Pages:

1202-1205

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.239-240.1202

Citation:

Cite this paper

Online since:

December 2012

Authors:

Ping Fan Xu, Zhong Ren Chen, Xing Xiao

Keywords:

EMI Signal, Grounding Loop Model, Parasitic Capacitance, Shield Windings

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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References

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