Magnetic and Transport AC Losses in HTS Roebel Cable

Author

Lakshmi, L.S. ; Long, N.J. ; Badcock, R.A. ; Staines, M.P. ; Jiang, Z. ; Thakur, K.P. ; Emhofer, J.

Author_Institution

Ind. Res. Ltd., Lower Hutt, New Zealand

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

3311

Lastpage

3315

Abstract

We present results for magnetic losses in a five strand HTS Roebel cable with 2 mm wide insulated strands. The loss as a function of field is compared to the isolated strands and an un-insulated cable. The loss as a function of the angle of the applied field to the cable normal is found to scale simply with the normal component of field. The dependence of the loss on the frequency of the applied field is presented and a small intrinsic frequency dependence of the superconductor is observed. The frequency dependence of the loss in a cable coupled by copper bridges is presented. The coupling loss is found to follow the Debye form at low fields. Transport AC losses in HTS Roebel cable with different strand insulation thicknesses are found to vary with the vertical separation of strands.

Keywords

barium compounds; high-temperature superconductors; magnetic leakage; superconducting cables; yttrium compounds; Debye form; HTS Roebel cable; YBCO; coupling loss; insulated strand; intrinsic frequency dependence; magnetic loss; size 2 mm; transport AC loss; Cable insulation; Conductors; Loss measurement; Magnetic hysteresis; Magnetic losses; Superconducting cables; Superconducting magnets; AC losses; HTS; Roebel cable; YBCO; continuously transposed conductors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2088369

Filename

5617308