Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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A Study on Shield Effect of Shield Case using SiFe Sheet

규소강판을 이용한 실드케이스의 차폐효과

  • Shin, Dong-Gyu (Dept. of Electrical Eng. Pukyong National University) ;
  • Kim, Young-Hak (Dept. of Electrical Eng. Pukyong National University)
  • 신동규 (부경대학교 전기공학과) ;
  • 김영학 (부경대학교 전기공학과)
  • Received : 2013.11.01
  • Accepted : 2013.12.04
  • Published : 2014.02.28
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Abstract

The shield effect of 4 layered shield case was investigated in this paper. The material of the case was non-oriented SiFe sheet with a thickness of 0.5mm. The size of the case was 100mm wide, 100mm high and 300mm long. Relative permeability of SiFe sheet was needed to calculate shield effect. It was obtained from the measurement by a ferrite yoke and from the calculation by eddy current FEM analysis. Three configurations were used to connect both ends of SiFe sheet. First one is a connection by double-welded butt. Second one is to put the sheet the same material above the confronted both ends of the sheet to avoid a leakage magnetic flux. The last one is ideally without any connection. The shield effect of the second one agreed well with the last one and showed the shield effect of -40dB.

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References

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