Modelling analysis of periodically arranged high-temperature superconducting tapes

Abstract

The operation of a high-temperature superconducting (HTS) device is strongly related to its electromagnetic fields and conditions. It is necessary to study the electromagnetic interaction of proximity HTS tapes integrated such as placed in the horizontal or vertical direction, which is important for the design and optimization of HTS devices. This paper presents a numerical model of periodically arranged HTS tapes using the finite element method (FEM). The numerical method has been developed to build the equivalent periodical arrangement of infinite HTS tapes and applied to simulate two basic arrangements, horizontal and vertical periodical arrangements. The magnetic field and current distributions of HTS tapes by periodical arrangements have been investigated. The effects on critical current with different arrangements have been illustrated. It is found that the Y-stack can reduce the current carrying capacity while the X-array can increase that in comparison to a single tape. The differences between the FEM results and analytical models have been analysed and also compared with the Norris model. The two mathematical models derived for AC loss prediction have shown higher accuracy than the existing analytical models. This study presents an effective method to optimize the electromagnetic fields, estimate the AC loss, and shows the phenomenon of central tapes in an HTS array, which could be potentially used in performance analysis of superconducting devices, e.g. HTS transformers.

Fundamental Design and Modelling of the Superconducting Magnet for the High-Speed Maglev: Mechanics, Electromagnetics, and Loss Analysis during Instability

“…As the in-depth mechanism of a superconductor is different from that of normal metal conductors, we established a more advanced model for the professional superconducting modelling based on the H-formulation FEM platform [20]. Our previous study also shows a delicate flowchart of the working principle of H-formulation [21]. The governing equation is:…”