Numerical reproduction of screening-current-induced fields in HTS tape windings using finite element method

Abstract

Abstract. The screening-current-induced fields in one of the high temperature superconducting (HTS) coils fabricated previously with coated conductors are evaluated numerically by using a one-dimensional finite element method, in which only the perpendicular component of a current vector potential is considered due to a very thin superconductor layer in the coated conductor. It is assumed that the voltagecurrent characteristics in the superconductor layer can be expressed by the critical state or n-value model, in which the field-dependent critical current density is also taken into account. The numerically calculated results of the screening-current-induced fields are compared with the experimental results carried out previously.

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba 2 Cu 3 O x high field magnets

“…Its governing equation uses magnetic intensity H as solution variable, and the whole model can be built and solved in commercial FEM software Comsol Multi-physics. T-w model has also been developed for the electromagnetic modelling of HTS, which couples T-formulation (Faraday's law) and integration equation (Biot-Savart Law) [36][37][38][39].…”