Title :
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
fDate :
6/1/1997 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
