US 12,444,525 B2
DC magnetic field superconducting coil power supply device
Hiroshi Kawashima, Fukuyama (JP); Shiro Sugimoto, Fukuyama (JP); and Tetsuya Ito, Fukuyama (JP)
Assigned to TERAL INC., Fukuyama (JP)
Appl. No. 18/561,494
Filed by TERAL INC., Fukuyama (JP)
PCT Filed Nov. 30, 2021, PCT No. PCT/JP2021/043991
§ 371(c)(1), (2) Date Nov. 16, 2023,
PCT Pub. No. WO2022/249514, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2021-090691 (JP), filed on May 28, 2021.
Prior Publication US 2024/0371553 A1, Nov. 7, 2024
Int. Cl. H01F 6/00 (2006.01); H01F 6/06 (2006.01)
CPC H01F 6/008 (2013.01) [H01F 6/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A DC magnetic field superconducting coil power supply device comprising:
a superconducting coil;
a power supply device configured to supply a DC voltage;
a plurality of chopper circuits connected in parallel between one end of the power supply device and one end of the superconducting coil; and
a controller configured to control the plurality of chopper circuits,
wherein the controller is configured to operate the plurality of chopper circuits in a time-division manner when charging the superconducting coil,
wherein each of the plurality of chopper circuits comprises:
a first switch and an inductor configured to connect the one end of the power supply device and the one end of the superconducting coil in series; and
a second switch configured to connect a node between the first switch and the inductor and a ground, and
wherein the ground is a node connecting an other end of the power supply device and an other end of the superconducting coil.