Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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EVALUATION METHOD FOR THE EFFECTIVE LENGTH OF TRAPEZOIDAL-TYPE ELECTROMAGNET

사다리꼴 형태 부상용 전자석의 유효길이 평가 방법

  • 구대현 (한국전기연구소 전력기기연구실) ;
  • 강도현 (한국전기연구소 전력기기연구실) ;
  • 신판석 (한국전기연구소 전력기기연구실)
  • Published : 1992.07.23
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Abstract

An evaluation method for the effective length of electromagnet - which bas U-shape in frontview and trapezoidal in side view - is presented. Using 2D FEM, 2 analysing models are introduced for calculating effective length of the magnet ; the front model is using the normalized equi-pole face area of the magnet and the side model using the normalized equi-magnetic circuit. The ratio of the effective length to the length of bottom plate (core) comes out 1.25 - 1.30. In addition, 3D FEM analysis has been done and a proto-type test model is manufactured to verify the analysing method. The ratio by the experiment appears 1.2, which is reasonably in good agreement with the suggested numerical results.

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