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, H. G. Lee

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    19 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

    Bibliographical note

    Funding Information:
    Manuscript received September 12, 2011; accepted November 11, 2011. Date of publication December 16, 2011; date of current version May 24, 2012. This study was supported by the Mid-career Researcher Program through an NRF grant funded by the MEST (2009-0085369). This study was also supported by the International Collaborative R&D Program of the KETEP grant funded by the Korea government Ministry of Knowledge Economy (MKE).

    Keywords

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

    ASJC Scopus subject areas

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

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