Normal zone initiation and propagation characteristics of a solid nitrogen cooled GdBCO racetrack pancake coil

J. B. Song, K. L. Kim, D. G. Yang, J. Y. Jang, T. K. Ko, M. C. Ahn, Haigun Lee

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17 Citations (Scopus)

Abstract

This paper presents quench test results, of both experiment and simulation, of a racetrack pancake coil wound with a GdBCO-coated conductor tape in a solid nitrogen (SN2) cooling system at 58 K. The longitudinal normal zone propagation velocities in the curved section were 2 times faster than those in the straight section. Therefore, the straight section should be protected more than the curved section when using racetrack-type, GdBCO pancake coils in large-scale rotating machines. The simulated results showed good agreement with the experimentally observed normal zone initiation times.

Original languageEnglish
Article number6107558
JournalIEEE Transactions on Applied Superconductivity
Volume22
Issue number3
DOIs
Publication statusPublished - 2012 Jun 25

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Keywords

  • GdBCO
  • normal zone propagation (NZP)
  • protection
  • racetrack pancake (RP) coil
  • solid nitrogen (SN2)

ASJC Scopus subject areas

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

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