Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field

Hidehito Shimizu, Hiroshi Ueda, Makoto Tsuda, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    It is very important to clarify characteristics of trapped field in HTS bulk exposed to an external AC magnetic field in application of high-temperature superconducting bulk to motors, magnetic levitation systems, bulk magnets and so on. We have experimentally investigated the transition of trapped field while applying external AC magnetic field to a disk-shaped YBCO bulk. The observed trapped-field attenuation is different from that by flux creep, i.e., zero external field. It may be considered that the trapped-field attenuation is affected by external AC magnetic field, particularly temperature rise due to AC loss. In this paper, electromagnetic behaviors within the bulk exposed to external AC magnetic field, especially supercurrent distribution, are investigated numerically using a simulation code based on the finite element method (FEM) considering voltage-current (E-J) characteristic. We focus on the relationship between the transition of supercurrent distribution within the bulk while applying external AC magnetic field and both n-value of E-J characteristic and temperature rise by AC loss.

    Original languageEnglish
    Pages (from-to)820-823
    Number of pages4
    JournalIEEE Transactions on Applied Superconductivity
    Volume12
    Issue number1
    DOIs
    Publication statusPublished - 2002 Mar

    Fingerprint

    alternating current
    Magnetic fields
    magnetic fields
    Magnetic levitation
    attenuation
    Temperature
    Magnets
    Creep
    levitation
    Fluxes
    Finite element method
    finite element method
    magnets
    Electric potential
    electromagnetism
    temperature
    electric potential
    simulation

    Keywords

    • AC loss
    • External AC magnetic field
    • FEM
    • n-value
    • Trapped field attenuation
    • YBCO bulk

    ASJC Scopus subject areas

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

    Cite this

    Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field. / Shimizu, Hidehito; Ueda, Hiroshi; Tsuda, Makoto; Ishiyama, Atsushi.

    In: IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, 03.2002, p. 820-823.

    Research output: Contribution to journalArticle

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