Electromagnetic Analysis of YBCO Superconducting Cables With High Current Transporting for Electric Devices

Abstract

Most high temperature superconducting (HTS) electric devices have been built by employing a superconducting composite cable. These HTS devices generally have large current carrying capacities. Therefore, the electromagnetic characteristic of a composite superconducting cable with high current density becomes a key point for the application of these HTS devices. A helical superconducting cable and a Roebel cable consisted of YBCO coated conductors with the critical current of 500 A @77 K in self-field are both proposed in this paper. The helical superconducting cable has two conductor layers and the structure parameters of the helical cable are given. The Roebel cable has 4 layers with critical current of 500 A. Two 3 D models are built for a helical cable and Roebel cable with variable geometries. Their magnetic flux distributions along the axis are presented based on finite element analysis method and their electromagnetic characteristics are discussed as well. The analysis model can be further applied for the large scale high temperature superconducting electric device design with high current carrying ability.

Numerical Study on AC Loss Properties of HTS Cable Consisting of YBCO Coated Conductor for HTS Power Devices

“…he development of fabrication technologies for long superconductors with high critical current densities has opened up new possibilities for high temperature superconductor applications. Yttrium Barium Copper Oxide (YBCO) coated conductors or Bismuth Strontium Calcium Copper Oxide (BSCCO) tapes are used as superconductor tapes [1][2]. Because of the higher current-carrying capacity for fusion magnets and HTS power devices, there are several HTS cable concepts being developed at companies and research institutions around the world, such as, Roebel…”