Electromagnetic modelling using T-A formulation for high-temperature superconductor (RE)Ba2Cu3Ox high field magnets

Yawei Wang, Hongyu Bai, Jianwei Li, Min Zhang, Weijia Yuan

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)
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Second generation (2G) high-temperature superconductor (HTS) (RE)Ba 2 Cu 3 O x (REBCO) shows a great potential in building high field magnets beyond 23.5 T. The electromagnetic modelling is vital for the design of HTS magnet, however, this always suffers the challenge of huge computation for high field magnets with large number of turns. This study presents a novel electromagnetic modelling based on T-A formulation for REBCO magnets with thousands of turns. An equivalent turn method is proposed to reduce the number of turns in calculation, so that the computation cost can be reduced significantly, and meanwhile the key electromagnetic behaviour of HTS magnet can be simulated with enough accuracy. The ramping operation of a fully HTS magnet with 12,000 turns are analysed using both the original T-A model with actual turns and improved T-A model with equivalent turns. The two models show a good agreement on the key electromagnetic behaviours of the magnet: distribution of current density, magnetic fields, screen current induced field and magnetisation loss, so that this improved T-A model using equivalent turns is validated. The T-A modelling of REBCO magnet is a powerful tool for the electromagnetic analysis of industry-scale high field magnets.
Original languageEnglish
Pages (from-to)218-226
Number of pages9
JournalHigh Voltage
Issue number2
Early online date6 Feb 2020
Publication statusPublished - 1 Apr 2020
Externally publishedYes

Bibliographical note

This is an open access article published by the IET and CEPRI under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)


Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 799902. This work was supported in part by the National Natural Science Foundation of China under grant nos. 11802036 and 11872195. This work was also partially performed at the National High Magnetic Field Laboratory, which was supported by the U.S. National Science Foundation Cooperative Agreement no. DMR-1644779 and the State of Florida.


  • magnetisation
  • high‐temperature superconductors
  • superconducting magnets
  • superconducting coils
  • barium compounds
  • Current density
  • eddy current losses
  • magnetic leakage
  • high field magnets
  • REBCO magnet
  • equivalent turn method
  • T‐A model
  • magnetic field
  • screen current induced field
  • magnetisation loss
  • electromagnetic analysis
  • high‐temperature superconductor
  • current density
  • REBCO coils
  • Ba2Cu3Ox

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology


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