DocumentCode :
1548323
Title :
Fields and losses in high T/sub c/ conductors
Author :
Campbell, A.M.
Author_Institution :
Interdisciplinary Res. Centre in Supercond., Cambridge Univ., UK
Volume :
9
Issue :
2
fYear :
1999
fDate :
6/1/1999 12:00:00 AM
Firstpage :
2137
Lastpage :
2142
Abstract :
The hysteresis losses in simple shapes and wires are reasonably well understood. Transport losses in tapes follow the Norris equation well. However it is not clear how cables should be treated since agreement with both a cylindrical model and an isolated tape model have been reported. Coupling losses depend on whether the tapes are insulated. If the layers are in contact current distributes itself over a few centimetres length to minimise the central field. For currents close to I/sub c/ the resistance must be taken into account. Changes in spacing between layers lead to significant redistribution, and losses due to the field from other phases could be large. A continuous change of pitch allows current to penetrate to the centre without cutting filaments.
Keywords :
eddy current losses; electric field effects; high-temperature superconductors; hysteresis; superconducting tapes; Norris equation; contact current distribution; high T/sub c/ conductors; hysteresis losses; isolated tape model; layers spacing; transport losses; Conductors; Electric variables measurement; Hysteresis; Impedance; Inductance; Insulation; Silver; Superconducting cables; Superconductivity; Wire;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.784890
Filename :
784890
Link To Document :
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