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Analysis and suppression of conducted electromagnetic interference of DC SSR with transformer isolation

  • School of Electrical Engineering and Automation, Harbin Institute of Technology
  • Beijing Ketong Electronic Relay Corp

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, the conducted EMI (Electromagnetic Interference) of a DC SSR (Solid State Relay) in which transformer isolation circuit was adopted was investigated at working frequency and higher harmonic. The origin and propagation path of the conducted EMI was analyzed by dividing it into common mode EMI and differential mode EMI. The equivalent circuit of dual-winding transformer of iron-core was proposed considering leakage inductance, iron loss in core and cupreous loss in winding. The conducted EMI model of the DC SSR was built by Orcad Pspice and Ansoft Q3D to predict EMI in the input port which was prescribed in GJB 1515A-CE102. The results of both simulation and experiment showed that the conducted EMI exceeded the limit of CE102. In order to improve EMC performance of SSR, an EMI filter was proposed to reduce the conducted EMI which was validated by experiment.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009
EditorsJingying Zhao, Jingqin Wang
PublisherInternational Academic Publishers
Pages467-472
Number of pages6
ISBN (Electronic)9789889968489
StatePublished - 2009
Externally publishedYes
Event3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009 - Wenzhou, China
Duration: 18 Oct 200921 Oct 2009

Publication series

NameProceedings of the 3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009

Conference

Conference3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009
Country/TerritoryChina
CityWenzhou
Period18/10/0921/10/09

Keywords

  • Conducted EMI
  • EMC
  • EMI filter
  • Transformer isolation

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