Computation of the E(I) characteristics of a superconducting cable using parameters of cable tapes

• Published in: Journal of physics. Conference series Vol. 43; no. 1; pp. 881 - 884
• Main Authors: Frolek, L, Souc, J
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.06.2006
• Subjects: Cables; Computation; Critical current (superconductivity); Mathematical models; Nonlinear equations; Parameters; Physics; Superconducting tapes; Superconductivity; Transport properties
• ISSN: 1742-6596; 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/43/1/215

E(I) characteristics for cable characterization in DC regime plays an important role in dealing with problems that concern superconducting cables. In the contribution a cable model consisting of 16 superconducting tapes connected in parallel is used. Transport properties of each tape were characterized by its E(I) curve with parameters, such as the critical current and the n-exponent. The parameters entering the calculation for all tapes were measured on this cable model in which the tapes were localized straight. The tapes had no conducting contact over the whole length. The transport current of the cable was divided into tapes according to their properties and contact resistances between each tape and current termination. It can be described by a set of non-linear equations. The set of nonlinear equations, which entered the computation for the array of the parallel tapes including tapes parameters and contact resistances, were resolved numerically. The contribution shows the way to obtain global E(I) characteristics using this calculation. The global E(I) characteristics were calculated and compared with characteristics measured for two variants of superconducting cable.