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Effects of Electrode Configurations on the Characteristics of Axial Magnetic Fields in Vacuum Interrupter

전극형상 변화가 진공차단기내 축방향 자기장 특성에 미치는 영향

  • 황정훈 (성균관대학교 대학원) ;
  • 이종철 (강릉대학교 기계자동차공학부) ;
  • 김윤제 (성균관대학교 기계공학부)
  • Published : 2008.01.01

Abstract

The vacuum interrupter (VI) is used for medium-voltage switching circuits due to its abilities and advantages as a compacted environmental friendly circuit breaker. In general, the application of a sufficiently strong axial magnetic field (AMF) permits the arc to be maintained in a diffused mode to a high-current vacuum arc. A full understanding of the vacuum arc physics is very important since it can aid to improve the performance of vacuum interrupter. In order to closely examine the vacuum arc phenomena, it is necessary to predict the magnetohydrodynamic (MHD) characteristics by the multidisciplinary numerical modeling, which is coupled with the electromagnetic and hydrodynamic fields, simultaneously. In this study, we have investigated the effect of changing geometrical parameters for electromagnetic behaviors of high-current vacuum arcs with two different types of AMP contacts, which are coil-type and cup-type, using a commercial finite element analysis (FEA) package, ANSYS. The present results are compared with those of MAXWELL 3D, a reliable electromagnetic analysis software, for verification.

Keywords

Vacuum Interrupter;Axial Magnetic Field;Multidisciplinary Numerical Modeling;Effective Arc Area

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