Degradation of critical current in an HTS coated conductor considering curvature of ellipse for rotating flux pump

Seunghak Han, Jeyull Lee, Haeryong Jeon, Tae Kuk Ko, Ho Min Kim, Ji Hyung Kim, Chang Ju Hyeon, Yong Soo Yoon

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8 Citations (Scopus)


A rotating HTS flux pump is used to study the charging characteristics of superconducting synchronous motor. In order to design the rotating flux pump, the elliptical winding is essential. Numerous studies have been conducted on the degradation of the critical current with respect to the bending condition of the second generation (2G) high-temperature superconducting (HTS) tape. These studies focused on the same radius of curvature depending on the bending position. Therefore, in this paper, the critical current in a HTS coated conductor (CC) considering the curvature of elliptical shape is measured with regard to nine mandrels. These are a tall prolate ellipsoid, oblate ellipsoid and semicircle. In the tall prolate ellipsoid, the degradation of the critical current was the least. The diameters of each shape are 20, 30 and 40 mm, respectively. Finally, the experimental observations have been compared with the theoretical predictions.

Original languageEnglish
Pages (from-to)141-146
Number of pages6
Publication statusPublished - 2018 Jan

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP), Republic of Korea (Nos. 2016R1A2B4007324 and 2017R1A2B3012208 ). We would like to thank Dr. Kyung Yong Yoon, editor and reviewers whose valuable comments made it possible for us to improve the manuscript.

Publisher Copyright:
© 2017 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)


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