AC losses in high-temperature superconductors: revisiting the fundamentals of the loss modelling |
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| Authors: | Jaakko Paasi Markku Lahtinen |
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| Institution: | Laboratory of Electricity and Magnetism, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland |
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| Abstract: | The fundamentals of the electromagnetic modelling of high-temperature superconductors are discussed. Special attention is paid to intrinsic features of high-temperature superconductors different to those of low-temperature superconductors. Examples of those features are strong thermal fluctuations, which results in enhanced flux creep and slanted E(J)-characteristics, anisotropy of critical current density and material resistivity, and the granularity of the material. Having established the fundamental principles for the loss modelling, the influence of thermal fluctuations, anisotropy and granularity on the AC losses are considered. |
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| Keywords: | Transport AC loss Magnetic AC loss E–J characteristic Magnetization |
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