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Temperature dependence of transport ac losses in Bi-2223/Ag multifilamentary tapes |
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| Authors: | M Majoros L Jansak S Zannella F Curcio P La Cascia V Ottoboni C M Friend L Le Lay B A Glowacki A M Campbell |
| Institution: | a Institute of Electrical Engineering, SAS, Bratislava, Slovak Republic b Edison, Milan, Italy c CISE, Milan, Italy d BICC Cables, UK e IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 OHE, UK f Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK g Department of Electrical Engineering, University of Bologna, Bologna, Italy |
| Abstract: | Temperature dependence of transport ac losses in two Bi-2223/Ag multifilamentary tapes with different dc current–voltage characteristics was measured using a lock-in technique at power frequencies. At each temperature, different criteria for critical current determination were used. Comparisons of normalised ac losses with predictions of theoretical models for a tape with elliptical cross-section and a thin strip were made. It was found that the form of the current–voltage characteristic and the critical current criterion play an important role in comparison with theoretical data. A new normalisation procedure of ac loss data is proposed. |
| Keywords: | Temperature dependence Transport ac loss Bi-2223 tape |
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