A new analysis method for accurate supercurrent distribution inside high-temperature superconducting bulk

Tomohiro Yanagawa, Kazufumi Kaneda, Atsushi Ishiyama, So Noguchi, Hideo Yamashita

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    It is difficult to accurately simulate supercurrent in high-temperature superconducting bulk even by adopting the finite-element method. The equivalent electrical conductivity of high-temperature superconducting bulk, which has a strong nonlinearity according to the E- J power law, is introduced for the supercurrent analysis. However, the strong nonlinearity results in bad convergency of the nonlinear equation solvers, i.e., the Newton-Raphson (NR) method. Consequently, the unsuitable and/or undulating supercurrent is observed. Therefore, in this paper, the accuracy of the supercurrent analysis in the high-temperature superconducting bulk is discussed and a new method is proposed for the accurate high-temperature superconducting bulk simulation. Then, the method combined a line search with the NR method is adopted as a nonlinear equation solver, and the improvement of convergency and computation time are investigated.

    Original languageEnglish
    Pages (from-to)751-754
    Number of pages4
    JournalIEEE Transactions on Magnetics
    Volume42
    Issue number4
    DOIs
    Publication statusPublished - 2006 Apr

    Fingerprint

    Newton-Raphson method
    Nonlinear equations
    nonlinear equations
    nonlinearity
    Temperature
    finite element method
    Finite element method
    electrical resistivity
    simulation
    Electric Conductivity

    Keywords

    • E-J power law
    • High-temperature superconducting (HTS) bulk
    • Nonlinear equation solver
    • Supercurrent distribution

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Physics and Astronomy (miscellaneous)

    Cite this

    A new analysis method for accurate supercurrent distribution inside high-temperature superconducting bulk. / Yanagawa, Tomohiro; Kaneda, Kazufumi; Ishiyama, Atsushi; Noguchi, So; Yamashita, Hideo.

    In: IEEE Transactions on Magnetics, Vol. 42, No. 4, 04.2006, p. 751-754.

    Research output: Contribution to journalArticle

    Yanagawa, Tomohiro ; Kaneda, Kazufumi ; Ishiyama, Atsushi ; Noguchi, So ; Yamashita, Hideo. / A new analysis method for accurate supercurrent distribution inside high-temperature superconducting bulk. In: IEEE Transactions on Magnetics. 2006 ; Vol. 42, No. 4. pp. 751-754.
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    AU - Yamashita, Hideo

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