Transient Behaviors of No-Insulation REBCO Pancake Coil during Local Normal-State Transition

Aika Ikeda, Takahiro Oki, Tao Wang, Atsushi Ishiyama, Katsutoshi Monma, So Noguchi, Tomonori Watanabe, Shigeo Nagaya

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Recently, no-insulation (NI) winding techniques have been proposed for achieving high current density and high thermal stability. To verify the excellent characteristics achieved using these techniques, we investigated the transient behaviors of NI REBCO pancake coils. In this paper, we evaluate transient electromagnetic and thermal behaviors during a local normal-state transition, based on a partial element equivalent circuit and thermal coupled numerical analysis. Moreover, we investigate temporal and spatial current distributions in the NI coil winding after a local normal transition occurs. We also clarify the reason for the suppression of temperature increase caused by the local normal-state transition in the NI winding. Subsequently, we evaluate the influence of the thickness of a Cu stabilizer on the thermal stability of the NI and conventional insulation windings. Finally, we discuss the mechanism of high thermal stability attained in the NI coil winding technique.

    Original languageEnglish
    Article number7390198
    JournalIEEE Transactions on Applied Superconductivity
    Volume26
    Issue number4
    DOIs
    Publication statusPublished - 2016 Jun 1

    Fingerprint

    insulation
    Insulation
    coils
    Thermodynamic stability
    thermal stability
    current distribution
    equivalent circuits
    Equivalent circuits
    numerical analysis
    high current
    Numerical analysis
    Current density
    retarding
    current density
    electromagnetism

    Keywords

    • High-temperature superconducting coil
    • no-insulation coil
    • partial element equivalent circuit
    • thermal stability

    ASJC Scopus subject areas

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

    Cite this

    Transient Behaviors of No-Insulation REBCO Pancake Coil during Local Normal-State Transition. / Ikeda, Aika; Oki, Takahiro; Wang, Tao; Ishiyama, Atsushi; Monma, Katsutoshi; Noguchi, So; Watanabe, Tomonori; Nagaya, Shigeo.

    In: IEEE Transactions on Applied Superconductivity, Vol. 26, No. 4, 7390198, 01.06.2016.

    Research output: Contribution to journalArticle

    Ikeda, Aika ; Oki, Takahiro ; Wang, Tao ; Ishiyama, Atsushi ; Monma, Katsutoshi ; Noguchi, So ; Watanabe, Tomonori ; Nagaya, Shigeo. / Transient Behaviors of No-Insulation REBCO Pancake Coil during Local Normal-State Transition. In: IEEE Transactions on Applied Superconductivity. 2016 ; Vol. 26, No. 4.
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    AU - Monma, Katsutoshi

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