Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil

Xudong Wang, Seungyong Hahn, Youngjae Kim, Juan Bascuñán, John Voccio, Haigun Lee, Yukikazu Iwasa

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

This paper presents experimental and analytical studies on the characteristic resistance of NI (no-insulation) ReBCO pancake coils, which are used in an equivalent circuit model to characterize 'radial as well as spiral' current paths within the NI coils. We identified turn-to-turn contact resistance as a major source of the characteristic resistance of an NI coil. In order to verify this, three single pancake NI HTS coils - 60, 40, 20 turns - were fabricated with their winding tension carefully maintained constant. A sudden discharge test was performed on each coil to obtain its characteristic resistance, and the relation between the turn-to-turn contact and the characteristic resistance was investigated. Based on the characteristic resistance and the n-value model, an equivalent circuit model was proposed to characterize the time-varying response of the NI coils. Charging tests were performed on the three test coils and the experimental results were compared with the simulated ones to validate the proposed approach with the equivalent circuit model.

Original languageEnglish
Article number035012
JournalSuperconductor Science and Technology
Volume26
Issue number3
DOIs
Publication statusPublished - 2013 Mar 1

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equivalent circuits
insulation
Equivalent circuits
Insulation
coils
Contact resistance
contact resistance
charging

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys

Cite this

Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil. / Wang, Xudong; Hahn, Seungyong; Kim, Youngjae; Bascuñán, Juan; Voccio, John; Lee, Haigun; Iwasa, Yukikazu.

In: Superconductor Science and Technology, Vol. 26, No. 3, 035012, 01.03.2013.

Research output: Contribution to journalArticle

Wang, Xudong ; Hahn, Seungyong ; Kim, Youngjae ; Bascuñán, Juan ; Voccio, John ; Lee, Haigun ; Iwasa, Yukikazu. / Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil. In: Superconductor Science and Technology. 2013 ; Vol. 26, No. 3.
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AU - Voccio, John

AU - Lee, Haigun

AU - Iwasa, Yukikazu

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