Characterization of HTS coils for superconducting rotating electric machine applications: challenges, material selection, winding process, and testing

Giuseppe Messina, Mohammad Yazdani-Asrami, Fabrizio Marignetti, Antonio della Corte

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
4 Downloads (Pure)

Abstract

The second-generation high-Temperature superconducting tapes (2G-HTS) such as the REBCO coated conductors are known for their strong mechanical properties and high current carrying capacity with low ac losses compared with first-generation HTS tapes as well as low-Temperature superconductors. Therefore, they seem to be good candidates to assemble coils for superconducting rotating electric machines (SuREMs). In this article, to investigate the influence of a soft magnetic composite (SMC) material on the dc and ac HTS coil performances at cryogenic temperatures, GdBCO-and YBCO-based commercial tapes from different manufactures were used to assemble ten HTS coils in double-pancake configuration. These tapes were wound using two different core structures, i.e., fixed and movable cores, having the same circular shape but different diameters as well as materials, i.e., fiberglass and SMC. Critical currents and ac transport current losses of these coils were measured using the electrical method. To evaluate the parallel and perpendicular components of the profile of magnetic flux density for each assembled HTS coil, a finite element model has been developed using Maxwell 2D. Eventually, the performance of different coils for SuREM application was discussed.

Original languageEnglish
Article number9285175
Number of pages10
JournalIEEE Transactions on Applied Superconductivity
Volume31
Issue number2
Early online date7 Dec 2020
DOIs
Publication statusPublished - 31 Mar 2021

Keywords

  • AC losses
  • electric machine
  • former/core material
  • high-temperature superconducting (HTS) coils tape

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