A new finite-element method simulation model for computing AC loss in roll assisted biaxially textured substrate YBCO tapes

Abstract

This paper presents a new finite-element simulation model for computing the electromagnetic properties and AC losses in systems of YBCO (yttrium barium copper oxide) conductors on roll assisted biaxially textured substrates (RABiTS). In this model, the magnetic field dependent permeability and ferromagnetic loss of the substrates in RABiTS YBCO tapes are taken into account. The simulations were employed to simulate the AC loss in stacks of two parallel connected YBCO tapes. The simulation results are compared with the experimental data to check the validity of the simulation model. The result reveals an effective way of significantly reducing AC loss in YBCO tapes by stacking two RABiTS YBCO coated conductors with the appropriate relative tape orientation.

Development of a three-dimensional finite-element model for high-temperature superconductors based on the H-formulation

“…In particular, the H-formulation [1,2] has increased in popularity both in the academic and the industrial world and it has been successfully used to study the ac loss performance not only of individual wires, but also of more complex systems like cables and coils [3][4][5]. The model has been adapted to take into account the presence of ferromagnetic materials as well [6,7]. Until now, the model has been only used to simulate 2-D problems, i.e.…”

Potential and limits of numerical modelling for supporting the development of HTS devices

“…Another case of interest is when the materials operate in self-field conditions and one needs to extract a truly local J c (B) dependence, whereas the experiments only provide a J c as a function of the applied field H a (see for example [51] and references therein). carrying an AC transport current [47].…”

Numerical study of AC loss of two-layer HTS power transmission cables composed of coated conductors with a ferromagnetic substrate

“…The influence of the ferromagnetic (FM) material on the transport AC loss of HTS tapes, monolayer cables, and coils was extensively studied both experimentally and theoretically [17][18][19][20][21][22][23]. For the works on twolayer HTS cables made of coated conductors with a ferromagnetic substrate, Amemiya et al [24] performed numerical AC loss calculations of two-layer superconducting power transmission cables comprising coated conductors with a ferromagnetic substrate concerning the arrangement with respect to the cable axis.…”