AC losses in multifilamentary Bi-2223/Ag superconducting tapes
- Tampere Univ. of Technology (Finland). Lab. of Electricity and Magnetism
- American Superconductor Corp., Westborough, MA (United States)
In this study the authors examined ac losses in a multifilamentary Bi-2223/Ag superconducting tape carrying ac transport current. The tape consisting of 85 filaments was helically wound to a single-layer coil. The losses were measured at 77 K in the frequency range from 1 Hz up to 250 Hz. Current amplitudes I{sub p} were ranging from i = I{sub p}/I{sub c} = 0.6 to 2.5, critical current I{sub c} = 15.4 A determined by the standard 1 {micro}V/cm static electric field criterion. The roles of special loss components were considered: hysteresis, flux-creep, coupling and eddy current losses. Hysteresis losses due to the self-field of the ac transport current were found to dominate when i {le} 1.1. Resistive losses dominated when i > 1.2. In the hysteretic regime, the higher the frequency, the smaller the losses per cycle.
- OSTI ID:
- 287708
- Report Number(s):
- CONF-950691--
- Journal Information:
- IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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