A new type of active-maglev system using YBCO bulk and multiple electromagnets

Hiroki Hayashi, Hiroshi Ueda, Makoto Tsuda, Atsushi Ishiyama, K. Hamajima

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    We present a new type of active-maglev system consisting of a disk-shaped superconducting bulk (YBCO) and multiple electromagnets. Using the active-maglev system composed of five electromagnets, we demonstrated continuous levitation and verified that the levitation height, as well as stability, could be remarkably improved by adjusting operating current of electromagnet individually. Electromagnetic behavior within the bulk was investigated numerically by the finite element method (FEM) adopting the Bean model. Agreements of levitation force and height between experiment and analysis were good. Suitable electromagnet operation for continuous levitation in terms of consumed operating energy was also investigated. It was found in analysis that continuous levitation could be realized efficiently by adopting a three-electromagnet operation and the operating procedure is applicable to multiple-electromagnet system. Therefore, based on the assumption of constant total operating current of three electromagnets, we numerically investigated the relationship between the operating procedure and levitation force in a five-electromagnet system as a function of levitation height. Maximum allowable weight of float (superconducting bulk and load) was evaluated through the estimation of minimum levitation force during continuous levitation as a function of air gap between electromagnets.

    Original languageEnglish
    Pages (from-to)907-910
    Number of pages4
    JournalIEEE Transactions on Applied Superconductivity
    Volume12
    Issue number1
    DOIs
    Publication statusPublished - 2002 Mar

    Fingerprint

    Electromagnets
    electromagnets
    levitation
    floats
    finite element method
    adjusting
    electromagnetism
    Finite element method
    air

    Keywords

    • Electromagnet
    • FEM
    • Magnetic levitation
    • Superconducting bulk

    ASJC Scopus subject areas

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

    Cite this

    A new type of active-maglev system using YBCO bulk and multiple electromagnets. / Hayashi, Hiroki; Ueda, Hiroshi; Tsuda, Makoto; Ishiyama, Atsushi; Hamajima, K.

    In: IEEE Transactions on Applied Superconductivity, Vol. 12, No. 1, 03.2002, p. 907-910.

    Research output: Contribution to journalArticle

    Hayashi, Hiroki ; Ueda, Hiroshi ; Tsuda, Makoto ; Ishiyama, Atsushi ; Hamajima, K. / A new type of active-maglev system using YBCO bulk and multiple electromagnets. In: IEEE Transactions on Applied Superconductivity. 2002 ; Vol. 12, No. 1. pp. 907-910.
    @article{3b37840f42084a798e241e743e597a64,
    title = "A new type of active-maglev system using YBCO bulk and multiple electromagnets",
    abstract = "We present a new type of active-maglev system consisting of a disk-shaped superconducting bulk (YBCO) and multiple electromagnets. Using the active-maglev system composed of five electromagnets, we demonstrated continuous levitation and verified that the levitation height, as well as stability, could be remarkably improved by adjusting operating current of electromagnet individually. Electromagnetic behavior within the bulk was investigated numerically by the finite element method (FEM) adopting the Bean model. Agreements of levitation force and height between experiment and analysis were good. Suitable electromagnet operation for continuous levitation in terms of consumed operating energy was also investigated. It was found in analysis that continuous levitation could be realized efficiently by adopting a three-electromagnet operation and the operating procedure is applicable to multiple-electromagnet system. Therefore, based on the assumption of constant total operating current of three electromagnets, we numerically investigated the relationship between the operating procedure and levitation force in a five-electromagnet system as a function of levitation height. Maximum allowable weight of float (superconducting bulk and load) was evaluated through the estimation of minimum levitation force during continuous levitation as a function of air gap between electromagnets.",
    keywords = "Electromagnet, FEM, Magnetic levitation, Superconducting bulk",
    author = "Hiroki Hayashi and Hiroshi Ueda and Makoto Tsuda and Atsushi Ishiyama and K. Hamajima",
    year = "2002",
    month = "3",
    doi = "10.1109/TASC.2002.1018547",
    language = "English",
    volume = "12",
    pages = "907--910",
    journal = "IEEE Transactions on Applied Superconductivity",
    issn = "1051-8223",
    publisher = "Institute of Electrical and Electronics Engineers Inc.",
    number = "1",

    }

    TY - JOUR

    T1 - A new type of active-maglev system using YBCO bulk and multiple electromagnets

    AU - Hayashi, Hiroki

    AU - Ueda, Hiroshi

    AU - Tsuda, Makoto

    AU - Ishiyama, Atsushi

    AU - Hamajima, K.

    PY - 2002/3

    Y1 - 2002/3

    N2 - We present a new type of active-maglev system consisting of a disk-shaped superconducting bulk (YBCO) and multiple electromagnets. Using the active-maglev system composed of five electromagnets, we demonstrated continuous levitation and verified that the levitation height, as well as stability, could be remarkably improved by adjusting operating current of electromagnet individually. Electromagnetic behavior within the bulk was investigated numerically by the finite element method (FEM) adopting the Bean model. Agreements of levitation force and height between experiment and analysis were good. Suitable electromagnet operation for continuous levitation in terms of consumed operating energy was also investigated. It was found in analysis that continuous levitation could be realized efficiently by adopting a three-electromagnet operation and the operating procedure is applicable to multiple-electromagnet system. Therefore, based on the assumption of constant total operating current of three electromagnets, we numerically investigated the relationship between the operating procedure and levitation force in a five-electromagnet system as a function of levitation height. Maximum allowable weight of float (superconducting bulk and load) was evaluated through the estimation of minimum levitation force during continuous levitation as a function of air gap between electromagnets.

    AB - We present a new type of active-maglev system consisting of a disk-shaped superconducting bulk (YBCO) and multiple electromagnets. Using the active-maglev system composed of five electromagnets, we demonstrated continuous levitation and verified that the levitation height, as well as stability, could be remarkably improved by adjusting operating current of electromagnet individually. Electromagnetic behavior within the bulk was investigated numerically by the finite element method (FEM) adopting the Bean model. Agreements of levitation force and height between experiment and analysis were good. Suitable electromagnet operation for continuous levitation in terms of consumed operating energy was also investigated. It was found in analysis that continuous levitation could be realized efficiently by adopting a three-electromagnet operation and the operating procedure is applicable to multiple-electromagnet system. Therefore, based on the assumption of constant total operating current of three electromagnets, we numerically investigated the relationship between the operating procedure and levitation force in a five-electromagnet system as a function of levitation height. Maximum allowable weight of float (superconducting bulk and load) was evaluated through the estimation of minimum levitation force during continuous levitation as a function of air gap between electromagnets.

    KW - Electromagnet

    KW - FEM

    KW - Magnetic levitation

    KW - Superconducting bulk

    UR - http://www.scopus.com/inward/record.url?scp=0036509841&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0036509841&partnerID=8YFLogxK

    U2 - 10.1109/TASC.2002.1018547

    DO - 10.1109/TASC.2002.1018547

    M3 - Article

    AN - SCOPUS:0036509841

    VL - 12

    SP - 907

    EP - 910

    JO - IEEE Transactions on Applied Superconductivity

    JF - IEEE Transactions on Applied Superconductivity

    SN - 1051-8223

    IS - 1

    ER -