Effect of winding tension on electrical behaviors of a no-insulation ReBCO pancake coil

Kwang Lok Kim, Seungyong Hahn, Youngjae Kim, Dong Gyu Yang, Jung Bin Song, Juan Bascuñán, Haigun Lee, Yukikazu Iwasa

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


This paper presents a study on the effects of winding tension on the characteristic resistance of a no-insulation (NI) coil. Two ReBCO NI test pancake coils, having the same winding i.d. (60 mm), o.d. (67.6 mm), and number of turns (60), were sequentially prepared in a way that the first test coil was wound with a winding tension of 12-N, tested, and then rewound with a new winding tension of 20-N for the same tests. In each test, the test coil was energized at a target current, the power supply was "suddenly" disconnected, and then the temporal decay of the coil center field was measured, from which the time constant of the test coil and the consequent characteristic resistance were obtained. To check the reproducibility of experimental data, each test was repeated four times and each time the test coil was unwound and rewound with a given winding tension. The experimental results were analyzed with equivalent circuit analyses. Correlation between the winding tension and the characteristic resistance was discussed in detail.

Original languageEnglish
Article number6613556
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2014


  • Characteristic resistance
  • No-insulation coil
  • ReBCO
  • Winding tension

ASJC Scopus subject areas

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


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