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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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
Issue number3
Publication statusPublished - 2012 Jun 25



  • 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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