Influence of AC Transport Current Balance on AC Loss in a Two Layered Polygonal YBCO Assembled Conductor

Author

Ogawa, J. ; Fukui, Satoshi ; Oka, Tetsuo ; Sato, Takao ; Tamura, A. ; Kasuga, E. ; Ryu, K.-W.

Author_Institution

Grad. Sch. of Sci. & Technol., Niigata Univ., Niigata, Japan

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

4704804

Lastpage

4704804

Abstract

In high temperature superconducting (HTS) AC applications, HTS tapes are assembled into high current capacity conductors. We previously reported our experimental results showing the AC loss reduction in a polygonal arranged single layer YBCO assembled conductor. The AC loss reduction is greatest in round shape arrangements. To get more detailed information, we investigated the influence of AC transport current balance on AC loss characteristics in a two layered hexagonal YBCO assembled conductor. We transported different AC currents in the outer and inner layers of YBCO tapes using two power sources, and the currents were in-phase with each other. The results show the effects of the balance of the transport currents on the AC loss characteristics. The minimum AC loss in the two layered YBCO assembled conductor occurs when the transport current in the inner layer is greater than the outer layer.

Keywords

barium compounds; copper compounds; high-temperature superconductors; superconducting devices; yttrium compounds; AC loss; AC transport current balance; HTS tapes; YBCO; high current capacity conductors; high temperature superconducting AC applications; polygonal assembled conductor; Conductors; Current measurement; Lead; Loss measurement; Magnetic fields; Yttrium barium copper oxide; AC transport current loss; transport current balance; two layered polygonal YBCO assembled conductor;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2011.2177792

Filename

6093735