Development of high strength pancake coil with stress controlling structure by REBCO coated conductor

Shigeo Nagaya, Tomonori Watanabe, Tsutomu Tamada, Mitsuhito Naruse, Naoji Kashima, Toshio Katagiri, Naoki Hirano, Satoshi Awaji, Hidetoshi Oguro, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    High strength against electromagnetic force is required for high magnetic field and large capacity coil in order to develop large-capacity superconducting magnetic energy storage (SMES) systems for electric power system control. Also, suppression of delaminating of Yttrium (Y) based coated conductor in a coil is required to manufacture the highly reliable and durable superconducting coil. Insulating coating, using liquid resin of low-temperature-curable-polyamide, was developed and showed durability at very low temperature without deterioration of transport properties of superconducting wire in a coil. Combining paraffin molding, delaminating, and deterioration of transport properties of superconducting wire were not also observed in a coil. These insulating techniques were applied to the pancake coil, in which superconducting wire and the reinforcing outer plates of the coil withstand electromagnetic force. The double pancake coil of this coil structure, called 'Yoroi-coil; Y-based oxide superconductor and reinforcing outer integrated coil' was prepared and the durability against electromagnetic force by hoop stress test was verified. The coil achieved 1.5 kA transporting at 4.2 K in 8 T back-up magnetic field without the degradation of transport properties. Maximum hoop stress at the hoop stress test reached 1.7 GPa, based on the calculations. This result confirmed that Yoroi-coil structure has a capability to withstand the large hoop stress, which exceeded the tensile strength of Y-based coated conductors, and bring out highly durable and reliable superconducting coils.

    Original languageEnglish
    Article number6384704
    JournalIEEE Transactions on Applied Superconductivity
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    high strength
    Superconducting wire
    coils
    conductors
    Transport properties
    Deterioration
    Durability
    hoops
    Magnetic fields
    Yttrium
    Oxide superconductors
    Nylons
    Polyamides
    Molding
    Paraffin
    Paraffins
    Energy storage
    delaminating
    Tensile strength
    Resins

    Keywords

    • Hoop stress
    • superconducting magnetic energy storage (SMES) coil
    • Yttrium-based coated conductor

    ASJC Scopus subject areas

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

    Cite this

    Development of high strength pancake coil with stress controlling structure by REBCO coated conductor. / Nagaya, Shigeo; Watanabe, Tomonori; Tamada, Tsutomu; Naruse, Mitsuhito; Kashima, Naoji; Katagiri, Toshio; Hirano, Naoki; Awaji, Satoshi; Oguro, Hidetoshi; Ishiyama, Atsushi.

    In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 6384704, 2013.

    Research output: Contribution to journalArticle

    Nagaya, S, Watanabe, T, Tamada, T, Naruse, M, Kashima, N, Katagiri, T, Hirano, N, Awaji, S, Oguro, H & Ishiyama, A 2013, 'Development of high strength pancake coil with stress controlling structure by REBCO coated conductor', IEEE Transactions on Applied Superconductivity, vol. 23, no. 3, 6384704. https://doi.org/10.1109/TASC.2012.2233854
    Nagaya, Shigeo ; Watanabe, Tomonori ; Tamada, Tsutomu ; Naruse, Mitsuhito ; Kashima, Naoji ; Katagiri, Toshio ; Hirano, Naoki ; Awaji, Satoshi ; Oguro, Hidetoshi ; Ishiyama, Atsushi. / Development of high strength pancake coil with stress controlling structure by REBCO coated conductor. In: IEEE Transactions on Applied Superconductivity. 2013 ; Vol. 23, No. 3.
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