US 12,087,467 B2
Superconducting wire, superconducting coil using same, and MRI
Hideki Tanaka, Tokyo (JP); Takaaki Suzuki, Tokyo (JP); Motomune Kodama, Tokyo (JP); and Manabu Aoki, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Appl. No. 17/279,187
Filed by HITACHI, LTD., Tokyo (JP)
PCT Filed Sep. 17, 2019, PCT No. PCT/JP2019/036323
§ 371(c)(1), (2) Date Mar. 24, 2021,
PCT Pub. No. WO2020/090259, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-204676 (JP), filed on Oct. 31, 2018.
Prior Publication US 2022/0005631 A1, Jan. 6, 2022
Int. Cl. H01B 12/04 (2006.01); G01R 33/34 (2006.01); H01F 6/06 (2006.01); H10N 60/01 (2023.01); H10N 60/20 (2023.01)
CPC H01B 12/04 (2013.01) [G01R 33/34023 (2013.01); H01F 6/06 (2013.01); H10N 60/0856 (2023.02); H10N 60/202 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A superconducting coil comprising:
a superconducting wire which includes a plurality of MgB2 strands and a first base metal, wherein
a center point of a region surrounded by the plurality of MgB2 strands and a central axis of a superconducting wire cross section are located apart from each other in a cross section orthogonal to a wire longitudinal direction,
when a bending radius during a heat treatment of the superconducting wire is larger than a bending radius of the superconducting coil, the superconducting wire is bent in the superconducting coil so that the center point of the region surrounded by the plurality of MgB2 strands is located inside the bending, and
when a bending radius during the heat treatment of the superconducting wire is smaller than the bending radius of the superconducting coil, the superconducting wire is bent in the superconducting coil so that the center point of the region surrounded by the plurality of MgB2 strands is located outside the bending.