Electromagnetic Characteristics Study of Two-Ply REBCO Tapes Pancake Coils

被引：5

作者：

Takahashi, Kohki ^{[1
]}

Okada, Tatsunori ^{[1
]}

Badel, Arnaud ^{[1
]}

Awaji, Satoshi ^{[1
]}

Miyazaki, Hiroshi ^{[2
]}

Hanai, Satoshi ^{[2
]}

Ioka, Shigeru ^{[2
]}

机构：

[1] Tohoku Univ, High Field Lab Superconducting Mat, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Toshiba Energy Syst & Solut Corp, Yokohama, Kanagawa 2300045, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2021年 / 31卷 / 05期

关键词：

Electromagnetic stress; high field superconducting magnet; hoop stress; REBCO coil;

D O I：

10.1109/TASC.2021.3069685

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An upgrading of the 25 T cryogen-free superconducting magnet (CSM) at the HFLSM to a 30T-class CSM is considered by replacing the present Bi2223 insert coil with a REBCO ones, since REBCO tapes have better mechanical and in-field critical current properties. In our strategy for the REBCO coil of the 30T-CSM, two tapes co-winding technique will be adopted in order to increase the space current density in the coil and to avoid a hotspot generation due to local degradation. Electromagnetic and mechanical properties of two bundle co-wound (two-ply) pancake coils are investigated as an R&D test coil for the 30T-CSM. The R&D coils were fabricated with Fujikura REBCO tapes that have 4.1 mm width and 0.11 or 0.15 mm thickness depending on the coil. The coil voltages and strains were measured at 4.2 K under a background field of 11 T. The maximum hoop stress up to 460-530 MPa at the outermost winding estimated by the BJR relation was applied, and no degradation by the hoop stress was found.

引用

页数：5