Title :
Influence of current distribution on quench process in noninsulated AC multi-strand superconducting cables
Author :
Tsuda, M. ; Okazaki, K. ; Hashizume, H. ; Ishiyama, A.
Author_Institution :
Dept. of Electr. Eng., Waseda Univ., Tokyo, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
In AC multi-strand superconducting cables, AC quench current is much less than that of DC. This AC quench current degradation is caused by AC loss, mechanical damage by cabling, nonuniform current distribution among strands due to self and mutual inductances between strands, and different electrical resistivity at the joint between superconducting strands and current lead. In this paper, the current distribution and the thermal behavior of noninsulated 7- and (6+1)-strand cables applying AC transport current are analyzed and the influence of contact electrical resistivity on the current redistribution and the thermal diffusion in the quench process are investigated.<>
Keywords :
current distribution; electrical resistivity; inductance; losses; quenching (thermal); superconducting cables; thermal diffusion; AC loss; AC quench current degradation; AC transport current; contact electrical resistivity; current distribution; current redistribution; electrical resistivity; mechanical damage; mutual inductance; noninsulated AC multi-strand superconducting cables; nonuniform current distribution; quench process; self inductance; superconducting strands; thermal behavior; thermal diffusion; Analytical models; Circuits; Current distribution; Electric resistance; Inductance; Region 1; Region 2; Superconducting cables; Thermal quenching; Thermal resistance;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
