Analysis of AC losses in a tri-axial superconducting cable

T. Hamajima, M. Tsuda, T. Yagai, S. Monma, H. Satoh, K. Shimoyama

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


High Temperature Superconducting (HTS) cables have been studied because of low loss and compactness, compared with conventional copper cables. Three-phase cables are usually composed of three single-phase concentric cables. Recently, a tri-axial cable, composed of three concentric phases, has been intensively developed, because it has advantages such as reduced amount of HTS tapes, low leakage fields, low heat leak and compactness, compared with the three single-phase cables. We analysed the three-phase current distributions in the tri-axial cable as functions of winding pitches of three concentric phase layers, and showed the balanced three-phase current distributions in the tri-axial cable. The each layer supplies a transport current under external magnetic field with the same frequency and different phase. We formulate the general form of AC loss of the transport current in combination with the external field with different phase, and analyse the AC loss of the tri-axial cable.

Original languageEnglish
Pages (from-to)1692-1695
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
Publication statusPublished - 2007 Jun


  • AC loss analysis
  • Azimuthal and axial fields
  • Balanced three phase currents
  • External out-of-phase field
  • HTS
  • Triaxial cable

ASJC Scopus subject areas

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


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