Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Development of Improved EMC Filter for EFT in Power Supply

  • Bae, Dae-Hwan (Dept. of electronics & Comm. Eng., Korea Maritime University) ;
  • Kim, Dong-Il (Dept. of Radio Sciences & Eng., Korea Maritime University) ;
  • Song, Jae-Man (RIIT, Korea Maritime University)
  • Published : 2001.05.01
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Abstract

Since the most of malfunctions in the industrial equipment controlled by processors is consist of the electrical fast transient (EFT)$^{[1],[2]}$TEX>, the International Electrotechnical Commission (IEC) prepared the dummy signal to test the immunity level of the equipments. To work out a countermeasure for the malfunction, We designed a new electromagnetic compatibility (EMC) filter for high power supply, which is consisted of a feed-through capacitor and ferrite materials with high permeability. The ferrite material is surrounded with a power cable or is inserted on the cable’s second layer in order to increase common-mode inductance. We have obtained a excellent insertion loss characteristics over the frequency band from 150 kHz to 30 MHz. The developed new EMC filter satisfy IEC 61000-4-4 and is suitable for industrial, militaly, and medical equipments with reduced malfuntions.

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References

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