Charging behavior in no-insulation REBCO pancake coils

Xudong Wang, Tao Wang, Erika Nakada, Atsushi Ishiyama, Ryusei Itoh, So Noguchi

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    This paper presents analytical studies on the charging characteristics of a no-insulation (NI) REBCO pancake coil. A partial element equivalent circuit (PEEC) model has been developed to evaluate the local current paths in NI REBCO pancake coils. The PEEC model is able to consider the asymmetry of the coil winding, the partial turn-to-turn contact electrical resistance, and the partial self and mutual inductances. The analysis results are compared with previous charging experimental results and simulations using a simplified parallel equivalent circuit (SPEC) model to validate the proposed approach with the PEEC model. To investigate the charging characteristics of a meter-class NI REBCO pancake coil, numerical simulations were performed by using the PEEC and SPEC models as a parameter of the turn-to-turn contact electrical resistance. In addition, the magnetic field in a 3-T NI REBCO coil was calculated by the SPEC model to clarify the charging delay of a practical scale magnet.

    Original languageEnglish
    Article number6939656
    JournalIEEE Transactions on Applied Superconductivity
    Volume25
    Issue number3
    DOIs
    Publication statusPublished - 2015 Jun 1

    Fingerprint

    equivalent circuits
    insulation
    Equivalent circuits
    charging
    Insulation
    coils
    Acoustic impedance
    electrical resistance
    inductance
    Inductance
    Magnets
    magnets
    simulation
    asymmetry
    Magnetic fields
    Computer simulation
    magnetic fields

    Keywords

    • Charging delay
    • high-temperature superconductors
    • no-insulation REBCO coil
    • partial element equivalent-circuit model
    • superconducting coils

    ASJC Scopus subject areas

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

    Cite this

    Charging behavior in no-insulation REBCO pancake coils. / Wang, Xudong; Wang, Tao; Nakada, Erika; Ishiyama, Atsushi; Itoh, Ryusei; Noguchi, So.

    In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 6939656, 01.06.2015.

    Research output: Contribution to journalArticle

    Wang, Xudong ; Wang, Tao ; Nakada, Erika ; Ishiyama, Atsushi ; Itoh, Ryusei ; Noguchi, So. / Charging behavior in no-insulation REBCO pancake coils. In: IEEE Transactions on Applied Superconductivity. 2015 ; Vol. 25, No. 3.
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