Complex study of transport AC loss in various 2G HTS racetrack coils

Yiran Chen, Min Zhang, Michal Chudy, Koichi Matsuda, Tim Coombs

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


HTS racetrack coils are becoming important elements of an emerging number of superconducting devices such as generators or motors. In these devices the issue of AC loss is crucial, as performance and cooling power are derived from this quantity. This paper presents a comparative study of transport AC loss in two different types of 2G HTS racetrack coils. In this study, both experimental measurements and computer simulation approaches were employed. All the experiments were performed using classical AC electrical method. The finite-element computer model was used to estimate electromagnetic properties and calculate transport AC loss. The main difference between the characterized coils is covered inside tape architectures. While one coil uses tape based on RABITS magnetic substrate, the second coil uses a non-magnetic tape. Ferromagnetic loss caused by a magnetic substrate is an important issue involved in the total AC loss. As a result, the coil with the magnetic substrate surprised with high AC loss and rather low performance.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Publication statusPublished - 15 Jun 2013


  • transport ac loss
  • YBCO race-track shape


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