Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Pspice Model of a ZnO Varistor for Impulse Current

임펄스 전류에 대한 ZnO 바리스터의 Pspice 모델

  • Lee, B.H. (Dept. of Electrical Engineering, Inha University) ;
  • Kong, Y.H. (Dept. of Electrical Engineering, Inha University) ;
  • Lee, D.M. (Dept. of Electrical Engineering, Inha University)
  • 이복희 (인하대학교 전기공학과) ;
  • 공영훈 (인하대학교 전기공학과) ;
  • 이동문 (인하대학교 전기공학과)
  • Published : 1999.07.19
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Abstract

Generally, ZnO varistors have dynamic characteristics that the cut-off voltage increases as the time to crest of the varistor current decreases. Dynamic characteristics of ZnO varistor are the most important factor in region of the steep front discharge current particularly. Also, V-I characteristics of ZnO varistor have hysterisis loop in time domain and frequency dependency. This paper deals with ZnO varistor numerical equation and modeling method which takes the behavior of varying clamping voltage into consideration during the time to crest, in range of $1{\mu}m{\sim}50{\mu}m$, of impulse current applied to a ZnO varistor. The simulated results by the proposed model are compared with experimental results for each of the impulse current.

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