An Improved Design of Conducted EMI Signal Suppression in SMPS

Ping Fan Xu; Zhong Ren Chen; Xing Xiao

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

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 239-240An Improved Design of Conducted EMI Signal...

An Improved Design of Conducted EMI Signal Suppression in SMPS

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

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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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