Development and fabrication of a Bi-2223 racetrack coil for generator applications

Author

Herd, K.G. ; Salasoo, L. ; Laskaris, E.T. ; Ranze, R.A. ; King, C.G. ; Haldar, P. ; Hoehn, J.G.

Author_Institution

Gen. Electr. Corp. Res. & Dev. Center, Schenectady, NY, USA

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

531

Lastpage

534

Abstract

The development and fabrication of a layer-wound, epoxy-impregnated Bi-2223 high-temperature superconducting (HTS) racetrack coil which generates 40000 ampere-turns of magnetomotive force (MMF) at 25 K is described. The coil was wound using Ag-sheathed Bi-2223 tape conductor laminated with copper foils for strength enhancement and insulated using a paper-wrap method. After epoxy impregnation, the coil was tested over a range of 16-25 K in a vacuum dewar using a closed-cycle helium refrigeration system. Descriptions of the tape lamination and insulation processing, the coil winding and impregnation, and the experimental test setup are given.

Keywords

bismuth compounds; calcium compounds; electric generators; high-temperature superconductors; strontium compounds; superconducting coils; superconducting machines; superconducting tapes; 16 to 25 K; Ag-sheathed Bi-2223 tape conductor; Bi-2223 racetrack coil; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O; closed-cycle helium refrigeration system; copper foil laminations; epoxy impregnation; fabrication; generator applications; high-temperature superconducting coil; layer-wound epoxy-impregnated coil; magnetomotive force; paper-wrap method; strength enhancement; tape lamination; vacuum dewar; Conductors; Copper; Fabrication; High temperature superconductors; Insulation; Superconducting coils; Superconducting epitaxial layers; Superconducting films; Superconducting magnets; Wounds;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.614558

Filename

614558