High-Tc superconductors and AC loss in electrotecnical devices

Günter Ries, Martino Leghissa, Jürgen Rieger, Jan Wiezorek, M.P. Oomen

    Research output: Contribution to journalArticleAcademicpeer-review

    22 Citations (Scopus)

    Abstract

    To replace conventional normal conducting solutions in electrotechnical devices, high-Tc superconductors must offer distinct economical and technical benefits in terms of lower overall loss, volume and weight. Based on AC loss theory we design appropriate 50 Hz reference conductors for cables, transformers and other applications, calculate admissible limits for the conductor variables filament diameter, twist and matrix resistance and compare this to the present state of Bi-2223-tape conductors and AC loss measurements. Further the influence of perpendicular AC field components on losses is addressed. High current devices will require multistrand conductors, where nonuniform current distribution due to unbalanced magnetic coupling may result in partial saturation and enhanced losses. As an example we discuss the multilayer HTSC-cable and present a solution based on a ‘zero flux condition' for azimuthal and axial magnetic fields.
    Original languageUndefined
    Pages (from-to)283-290
    Number of pages8
    JournalPhysica C
    Volume310
    Issue number1-4
    DOIs
    Publication statusPublished - 1998

    Keywords

    • Twist
    • Transport AC loss
    • Superconducting cable
    • METIS-128375
    • Bi-2223 tape
    • IR-73914
    • Current distribution

    Cite this