Numerical Study on AC Loss Characteristics of HTS Coils With Various Cross Sections and Methods of AC Loss Reduction

Author

Fukui, Satoshi ; Nishijyo, Takeru ; Abe, Shoichi ; Ogawa, Jun ; Yamaguchi, Mitsugi ; Sato, Takao ; Furuse, Mitsuho ; Tanaka, Hideki ; Arai, Kazuaki ; Umeda, Masaichi ; Takao, Tomoaki

Author_Institution

Graduate Sch. of Sci. & Technol., Niigata Univ.

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

139

Lastpage

142

Abstract

AC loss characteristics of high temperature superconducting coils wound by Bi2223/Ag tape with various cross sections are numerically investigated. The numerical results show that the smaller coil aspect ratio, the smaller AC losses in the HTS coil. It was considered from the numerical results that the coil aspect ratio giving the minimum coil volume is the better shape judging from the many aspects such as the required length of tape, the stored energy, the central magnetic field and the critical current together with the AC loss. It was also shown by the numerical study that the optimal coil design giving the reduced AC loss can be done by employing the stepped cross section coil and the turn number graded coil

Keywords

bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; lead compounds; losses; numerical analysis; silver; strontium compounds; superconducting coils; superconducting tapes; (BiPb)₂Sr₂Ca₂Cu₃O ₁₀-Ag; AC loss reduction; Bi2223-Ag tape; critical current; high temperature superconducting coils; numerical study; optimal coil design; stepped cross section coil; turn number graded coil; Critical current; High temperature superconductors; Magnetic analysis; Magnetic fields; Magnetic losses; Magnetization; Numerical models; Shape; Superconducting coils; Wounds; AC loss; AC magnetization loss; AC transport current loss; HTS coil;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2006.870018

Filename

1642810