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Losses in a BSCCO/Ag tape carrying AC transport currents in AC magnetic fields applied in different orientations

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3 Author(s)
Wolfbrandt, A. ; Dept. of Electron., Malardalen Univ., Vasteras, Sweden ; Magnusson, N. ; Hornfeldt, S.

In most prospective electric power applications of high-temperature superconductors (HTSs), the conductor is wound in a coil configuration. For a coil of finite length, the magnetic field orientation is axial in the middle of the coil, while the field contains a substantial radial component at the coil ends. In a superconducting BSCCO/Ag tape, the AC losses depend strongly on the orientation of the magnetic field. In this study, we present experimental results of the AC losses in a multifilamentary silver-sheathed Bi-2223 HTSs tape, carrying alternating transport currents in externally applied alternating magnetic fields at different orientations, with respect to the face of the tape and perpendicular to the transport current. The AC losses were measured calorimetrically, at fixed temperature and frequency. The results are compared to semi-empirical models of the AC losses in HTSs tape. We present a more general model of the angular dependence of the AC losses

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 4 )