DocumentCode :
786024
Title :
Relation between inter-sub-cable contact resistance and coupling loss in multiple-stage stranded cable
Author :
Seo, Kazutaka ; Fukuhara, Katsuhiko ; Hasegawa, Mitsuru
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Hyogo, Japan
Volume :
12
Issue :
1
fYear :
2002
fDate :
3/1/2002 12:00:00 AM
Firstpage :
1635
Lastpage :
1638
Abstract :
AC losses in superconducting multi strand cables, those that are used in large scaled applications, e.g. fusion, are governed by contact resistances between the strands. Especially, in the cable with multiple-stage twisting, a variety of magnetic field diffusion time constants exist and these correspond to the quantities of inter-strand coupling losses in each cabling stage. The rate of magnetic field change is less than several T´s in usual fusion machines. In this condition, the magnetic field penetrates well into the cable and the coupling current circuit with the larger time constant shows larger AC loss. Here, the time constant is equal to the leakage inductance divided by resistance along the coupling current loop. Therefore, evaluating the coupling current in the larger loop, which consists of a higher twisting stage, e.g., usually the final cabling stage, loss in the whole cable could be expected. The leakage inductance between sub-cables could be estimated considering electrical centers of them. On the other hand, inter-sub-cable contact resistances have not been evaluated until now. In this study, by establishing the inter-sub-cable contact resistance model, the AC loss in the cable with multiple cabling stage was evaluated numerically. We discussed the modeling of contact resistance between sub-cables intensively.
Keywords :
contact resistance; electric potential; inductance; losses; magnetic fields; superconducting cables; voltage distribution; AC losses; contact resistance model; coupling current; coupling loss; inter-sub-cable contact resistance; large scaled applications; leakage inductance; magnetic field change; magnetic field diffusion time constants; multiple-stage stranded cable; multiple-stage twisting; superconducting multi strand cables; Contact resistance; Coupling circuits; Electric potential; Electric resistance; Electrical resistance measurement; Inductance; Magnetic circuits; Magnetic fields; Power cables; Superconducting cables;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2002.1018719
Filename :
1018719
Link To Document :
بازگشت