TY - JOUR
T1 - AC Loss Reduction in REBCO Coated Conductors using the Hexagonal Arrangement Cabling Method
AU - Li, Xiaodong
AU - Ainslie, Mark
AU - Song, Dongbin
AU - Yang, Wenjiang
AU - Macian-Juan, Rafael
N1 - Publisher Copyright:
IEEE
PY - 2023/12/26
Y1 - 2023/12/26
N2 - High-temperature superconducting (HTS) rare-earth barium copper oxide (REBCO) coated conductors with outstanding critical current density under high fields can help realize a high-field path toward magnetic-confinement fusion. REBCO cabling methods such as conductor on round core (CORC) cables, twisted stacked tape conductor (TSTC) cables, and Rutherford cables are based on the cable-in-conduit conductor (CICC) developed for low-temperature superconducting (LTS) Nb3Sn and Nb-Ti conductors. However, the REBCO coated conductor has challenges in achieving current transposition by twisting due to its ceramic-like mechanical behavior. In addition, it is more sensitive to external perpendicular magnetic fields with its rectangular cross-section than metallic LTS superconductors. In order to solve these issues, a hexagonal arrangement REBCO cabling method with the inherent advantage of mechanical protection and inductance balance is proposed in this paper. The electromagnetic behavior of REBCO coated conductors in the cable is evaluated using H-formulation and T-A formulation-based finite element methods. Results show that AC losses can be reduced using the hexagonal arrangement method compared with non-twisted cables and TSTC cables, which makes it a potentially helpful cabling method for ultra-high-field large-scale applications with high-level inductance balance requirements, especially the central solenoid coils of thermonuclear fusion reactors.
AB - High-temperature superconducting (HTS) rare-earth barium copper oxide (REBCO) coated conductors with outstanding critical current density under high fields can help realize a high-field path toward magnetic-confinement fusion. REBCO cabling methods such as conductor on round core (CORC) cables, twisted stacked tape conductor (TSTC) cables, and Rutherford cables are based on the cable-in-conduit conductor (CICC) developed for low-temperature superconducting (LTS) Nb3Sn and Nb-Ti conductors. However, the REBCO coated conductor has challenges in achieving current transposition by twisting due to its ceramic-like mechanical behavior. In addition, it is more sensitive to external perpendicular magnetic fields with its rectangular cross-section than metallic LTS superconductors. In order to solve these issues, a hexagonal arrangement REBCO cabling method with the inherent advantage of mechanical protection and inductance balance is proposed in this paper. The electromagnetic behavior of REBCO coated conductors in the cable is evaluated using H-formulation and T-A formulation-based finite element methods. Results show that AC losses can be reduced using the hexagonal arrangement method compared with non-twisted cables and TSTC cables, which makes it a potentially helpful cabling method for ultra-high-field large-scale applications with high-level inductance balance requirements, especially the central solenoid coils of thermonuclear fusion reactors.
KW - AC losses
KW - magnetic-confinement devices
KW - REBCO coated conductor
KW - ultra-high field magnet
UR - http://www.scopus.com/inward/record.url?scp=85181565630&partnerID=8YFLogxK
U2 - 10.1109/TASC.2023.3347374
DO - 10.1109/TASC.2023.3347374
M3 - Article
SN - 1051-8223
VL - 34
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 5
M1 - 5901505
ER -
