Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Analytic equation to energy conversion between electromagnetically coupled superconducting and copper coils

  • An, Soobin (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Choi, Kibum (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Bang, Jeseok (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Bong, Uijong (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Hahn, Seungyong (Department of Electrical and Computer Engineering, Seoul National University)
  • Received : 2019.02.15
  • Accepted : 2019.03.28
  • Published : 2019.03.31
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Abstract

This paper presents an analytic method to calculate energy conversion between electromagnetically coupled high-temperature superconducting and copper coils. The energy transfer from one coil to the other is commonly observed during quench of a no-insulation (NI) high temperature superconductor (HTS) magnet. Proper understanding of this phenomenon is particularly important to protect an NI HTS magnet, especially to avoid any potential mechanical damages. In this paper, analytic equations are obtained to estimate the energy transfer between the NI and copper coils. The well-known lumped-parameter circuit model is adopted provided that key parameters of the coils are given.

Keywords

CJJOCB_2019_v21n1_36_f0001.png 이미지

Fig. 1. (a) Electric circuit of NI HTS coil with electromagnetically coupled coil using lumped parameter circuit model and (b) disconnecting current source after quench detection.

TABLE I COIL PARAMETERS.

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