Development and characterization of Bi-2223 conductors for HTS transformer applications

Author

Leghissa, M. ; Rieger, J. ; Nanke, R. ; Oomen, M.P. ; Berthold, T. ; Neumuller, H.-W. ; Fischer, B. ; Gierl, J. ; Hassler, W. ; Schubert, M. ; Haas, V.

Author_Institution

Corp. Technol., Siemens AG, Munich, Germany

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2943

Lastpage

2946

Abstract

Multifilamentary Bi-2223 tapes for AC applications in HTS transformers are studied. By twisting the filaments in tapes with AgMg sheath and Ag matrix the parallel field AC loss at power frequencies is lowered by more the 50% for the optimum twist length of 10 mm. The critical current density of these conductors corresponds to >80% of the non-twisted tape. In order to achieve a larger loss reduction tapes with Ag-alloys and ceramic barriers are studied

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; losses; multifilamentary superconductors; strontium compounds; superconducting tapes; superconducting transformers; AC applications; Ag; Ag matrix; Ag-alloys; AgMg; AgMg sheath; Bi-2223; Bi₂Sr₂Ca₂Cu₂O₈; Bi₂Sr₂Ca₂Cu₃O₈; HTS; ceramic barriers; critical current density; multifilamentary tapes; optimum twist length; parallel field AC loss; transformer applications; twisted filaments; Conductors; Critical current; Critical current density; Current density; Fabrication; Frequency; High temperature superconductors; Loss measurement; Magnetic field measurement; Testing;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919679

Filename

919679