Title :
Numerical evaluation of AC loss in high temperature superconducting coil
Author :
Tonsho, Hiroyuki ; Toyoda, Momoko ; Fukui, Satoshi ; Yamaguchi, Mitsugi ; Sato, Takao ; Furuse, Mitsuho ; Tanaka, Hideki ; Arai, Kazuaki ; Umeda, Masaichi
Author_Institution :
Graduate Sch. of Sci. & Technol., Niigata Univ., Japan
fDate :
6/1/2004 12:00:00 AM
Abstract :
An approximated method to estimate the electro-magnetic AC loss in high temperature superconducting coil was proposed. We applied this method to estimate the AC loss characteristics of the high temperature superconducting coil made by stacking pancake coils which are wound by Bi2223/Ag tape. The analytical AC losses of the HTS coil were compared with the measured AC losses before and after impregnation by epoxy resin obtained in the previous work by National Institute of Advanced Industrial Science and Technology. The analytically estimated electro-magnetic AC losses in the HTS coil were much smaller than the measured AC loss of the coil. The AC loss characteristics could not be explained by the method proposed in this paper. The main reason of this discrepancy was considered that the measured AC losses in the HTS coil contained large amount of the mechanical AC loss due to the AC vibration of the winding even if the HTS coil was impregnated.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); electric fields; high-temperature superconductors; lead compounds; losses; magnetisation; silver; strontium compounds; superconducting coils; superconducting tapes; AC loss characteristics; AC magnetization loss; AC transport current loss; AC vibration; Bi2223-Ag tape; Bi2Sr2Ca2Cu3O-Ag; HTS coil; National Institute of Advanced Industrial Science and Technology; current density relation; electric field; electromagnetic AC loss; epoxy resin impregnation; high temperature superconducting coil; mechanical AC loss; pancake coil stacking; winding vibration; Epoxy resins; High temperature superconductors; Loss measurement; Magnetic field measurement; Magnetic fields; Magnetic losses; Stacking; Superconducting coils; Vibration measurement; Wounds; AC magnetization loss; AC transport current loss; electric field and current density relation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830027