한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제23권4호
  • /
  • Pages.44-48
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  • 2021
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  • 1229-3008(pISSN)
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  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
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Fundamental characteristic analysis on 6 T-class high-temperature superconducting no-insulation magnet using turn-distributed equivalent circuit model

  • Liu, Q. (Changwon National University) ;
  • Choia, J. (Changwon National University) ;
  • Sim, K. (Supergenics Co., Ltd.) ;
  • Kim, S. (Changwon National University)
  • 투고 : 2021.11.29
  • 심사 : 2021.12.29
  • 발행 : 2021.12.31
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초록

In order to obtain ultra-high resolution MRI images, research and development of 11 T or higher superconducting magnets have been actively conducted in the world, recently. The high-temperature superconductor (HTS), first discovered in 1986, was very limited in industrial application until mid-2010, despite its high critical current characteristics in the high magnetic field compared to the low-temperature superconductor. This is because HTS magnets were unable to operate stably due to the thermal damage when a quench occurred. With the introduction of no-insulation (NI) HTS magnet winding technology that does not burn electrically, it could be expected that the HTS magnets are dramatically reduced in weight, volume, and cost. In this paper, a 6 T-class NI HTS magnet for basic characteristic analysis was designed, and a distributed equivalent circuit model of the NI coils was configured to analyze the charging current characteristics caused by excitation current, and the charge delay phenomenon and loss were predicted through the development of a simulation model. Additionally, the critical current of the NI HTS magnets was estimated, considering the magnetic field, its angle and temperature with a given current. The loss due to charging delay characteristics was analyzed and the result was shown. It is meaningful to obtain detailed operation technology to secure a stable operation protocol for a 6T NI HTS magnet which is actually manufactured.

키워드

과제정보

This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711138067, KMDF_PR_20200901_0063)

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