Improvement in Stability and Operating Characteristics of HTS Coil Using MIT Material

Hyung Wook Kim, Jin Hur, Seog Whan Kim, Seok Beom Kim, Rock Kil Ko, Dong Woo Ha, Ho Min Kim, Jin Hong Joo, Young Sik Jo

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


This paper proposes a new method of achieving electrical stability and controllability of a high-temperature superconductor (HTS) coil. The proposed method applied a material with a metal-insulator transition (MIT) property to the turn-to-turn resistance of an HTS coil. As a result, the turn-to-turn resistance remained at the insulator level in the normal state, thus removing delay during charging and discharging. During transient state, the turn-to-turn resistance dropped to the metal level, and current bypass occurs similar to that in a noinsulation coil, thus preventing the coil from burning out. The validity of the MIT characteristic and the proposed method were verified through experiments.

Original languageEnglish
Article number7822904
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Publication statusPublished - Jun 2017


  • 2G HTS coil
  • controllability
  • current bypass
  • electrical stability
  • metal-insulator transition
  • no insulation
  • quench

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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