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An additional loss source in cabled multifilamentary superconductors

✍ Scribed by I. Hlásnik; G. Ries; M. Polák; L. Krempaský

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
629 KB
Volume
20
Category
Article
ISSN
0011-2275

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✦ Synopsis

It is shown that irregularities in the twist rate of a multifilamentary superconducting strand, which may occur in the cabling or braiding process of a high current conductor, give rise to additional matrix currents and enhanced ac losses. Electrodynamic equations for matrix and filament currents in a strand with a sudden change in twist rate are derived and damped wave solutions are given for an external harmonic field as well as for a ramp field. Inder unfavourable conditions the associated loss enhancement may become comparable to the regular matrix losses. This is also verified experimentally by magnetization measurements. Some recommendations for cable design are given.

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