Torsional Dependence of the Critical Current in 2G Tapes

Abstract

Since the second generation (2G) superconducting wires started to be produced in a large scale almost a decade ago, the quality of the materials manufactured has been continually improved. Every year the manufacturers present new materials with better electrical properties, increasing the critical current density, critical magnetic field and the total length produced with continuous homogeneity. The mechanical properties of the coated conductor should be taken in account, since electro-dynamical forces appear in working conditions as stress in the cooling and heating processes. In applications as fault current limiters, SMES, transformers, electromagnets, motors, cables, etc., the consideration of them is mandatory to the project of those devices. In this context, the present work studies the electrical and mechanical properties of 12 mm 2G wires samples under torsion without axial tension. Critical current is measured as a function on the torsion angle. Details of the experiment and their results are here presented.

Semantics of HTS AC Loss Modeling: Theories, Models, and Experiments

“…of incompatibility between the model and our physical intuition. This can be fixed by taking the self-field into account in the boundary conditions using the Biot-Savart law or with a different discretization altogether, using a truly non-conducting domain and cohomology basis functions to set the net currents [27,28,38,39].…”