Numerical Investigation of Metal Insulation Technique on Turn-to-Turn Contact Resistance of REBCO Pancake Coils

So Noguchi, Ryosuke Miyao, Katsutoshi Monma, Hajime Igarashi, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    No-insulation (NI) REBCO pancake coils show high thermal stability, however the charging delay is an issue. Hence, to improve the charging delay, it was proposed that a stainless steel (SUS) tape was cowound between turns, called 'metal-as-insulation' or 'metal-insulation (MI),' to increase the turn-to-turn contact resistivity. The MI technique could make the turn-to-turn contact resistivity approximately 50 times large compared to a conventional NI REBCO pancake coil. This paper reports a bypass current behavior on the cross section of MI REBCO pancake coil using two-dimensional finite element method. The influence of the SUS tape thickness, the MI material, and the number of SUS tapes on the turn-to-turn contact resistivity is investigated. As the result, it is clarified that the turn-to-turn contact resistivity strongly depends on the surface condition and number of SUS tapes.

    Original languageEnglish
    Article number7817744
    JournalIEEE Transactions on Applied Superconductivity
    Volume27
    Issue number4
    DOIs
    Publication statusPublished - 2017 Jun 1

    Fingerprint

    Contact resistance
    contact resistance
    insulation
    Insulation
    coils
    Metals
    Tapes
    tapes
    electric contacts
    metals
    electrical resistivity
    charging
    bypasses
    Stainless Steel
    stainless steels
    finite element method
    Thermodynamic stability
    thermal stability
    Stainless steel
    Finite element method

    Keywords

    • Metal insulation
    • NI RENCO pancake coil
    • stainless steel co-winding
    • turn-to-turn contact surface

    ASJC Scopus subject areas

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

    Cite this

    Numerical Investigation of Metal Insulation Technique on Turn-to-Turn Contact Resistance of REBCO Pancake Coils. / Noguchi, So; Miyao, Ryosuke; Monma, Katsutoshi; Igarashi, Hajime; Ishiyama, Atsushi.

    In: IEEE Transactions on Applied Superconductivity, Vol. 27, No. 4, 7817744, 01.06.2017.

    Research output: Contribution to journalArticle

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    AU - Ishiyama, Atsushi

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