AC loss comparison between multifilament and nonstriated YBCO coils designed for HTS propulsion motors

Dong Xing, Jay Patel, Qixing Sun, Jiahui Zhu, Guomin Zhang, Fei Liang, Weijia Yuan, Min Zhang

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In this paper, the properties of current capacity and ac transport loss of striated high temperature superconductor (HTS) coil is compared with ordinary HTS coil by using both experimental and simulation methods. The measurements were carried out by transporting a sinusoidal varying current at 77 K, with an amplitude range of 10-50 A in frequency from 70 up to 300 Hz. Measurement facilities and methods are explained in more detail in the paper. The critical current of the 4-mm width multifilament coil made with four filaments at a spacing 0.03 mm was found to be lower than that of the nonstriated coil. The frequency dependent characteristics agreed well in both experimental and simulated results. Reducing ac loss of HTS is one enabling factor for widespread adoption of the technology, and therefore, understanding its characteristics is important and discussed in this paper. Future plans based on this preliminary work are the testing of multifilament tapes in an axial flux motor field environment.

Original languageEnglish
Article number5203005
Number of pages5
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Early online date14 Feb 2017
Publication statusPublished - 1 Jun 2017


  • AC loss
  • loss measurement
  • multi-filament superconductors
  • superconducting coils

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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