An Experimental Study on Manipulation of Individual Coil Current in Parallel-Connected HTS Pancake Coils

Wonseok Jang, Jeseok Bang, Jaemin Kim, Geonyoung Kim, Jung Tae Lee, Hyun Sung Noh, Min Kyu Sun, Haigun Lee, Seungyong Hahn, Sangjin Lee

Research output: Contribution to journalArticlepeer-review

Abstract

This paper reports experimental results of individual coil current manipulation by heater operation in parallel-connected three no-insulation (NI) high-temperature superconductor (HTS) pancake coils. The resistive heater was installed at the coil terminal of the lowermost pancake coil. During magnet operation with a power supply current held constant in a bath of liquid nitrogen at 77 K, the heater was operated to reduce the coil current of the lowermost pancake coil. Due to the heater operation, the coil currents of the uppermost and the middle pancake coil increased as a result of the coil-to-coil current sharing mechanism. The result demonstrates the potential of handling the unstable magnet operation in a parallel-connected magnet by taking action to each coil individually such as coil current reduction without significant degradation of the magnetic field intensity.

Original languageEnglish
Article number4602105
JournalIEEE Transactions on Applied Superconductivity
Volume33
Issue number5
DOIs
Publication statusPublished - 2023 Aug 1

Bibliographical note

Publisher Copyright:
© 2002-2011 IEEE.

Keywords

  • High temperature superconductor magnet
  • coil-to-coil current sharing
  • individual coil current manipulation
  • no-insulation magnet
  • parallel-connected HTS magnet

ASJC Scopus subject areas

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

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