US 11,869,709 B2
Superconducting magnet system and quench protection circuit thereof
Yunxing Song, Hubei (CN); and Liang Li, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Appl. No. 17/622,864
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
PCT Filed Apr. 25, 2021, PCT No. PCT/CN2021/089599
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2022/166004, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 202110163248.X (CN), filed on Feb. 5, 2021.
Prior Publication US 2023/0137679 A1, May 4, 2023
Int. Cl. H02H 7/00 (2006.01); H01F 6/02 (2006.01); H01F 6/06 (2006.01); H01F 6/04 (2006.01)
CPC H01F 6/02 (2013.01) [H01F 6/06 (2013.01); H02H 7/001 (2013.01); H01F 6/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A quench protection circuit, comprising: a superconducting unit, a first diode integrated element, a low-temperature superconducting switch and a thermal shield;
wherein the superconducting unit is composed of M superconducting coils connected in series, wherein M is an integer number greater than 1;
a non-serial connection end of a first superconducting coil of the M superconducting coils and a non-serial connection end of an M-th superconducting coil of the M superconducting coils are respectively connected to current leads, and the current leads are connected to an excitation power supply;
one end of the low-temperature superconducting switch is connected to the non-serial connection end of the first superconducting coil, and the other end of the low-temperature superconducting switch is connected to the non-serial connection end of the M-th superconducting coil;
the first diode integrated element is connected in parallel with the low-temperature superconducting switch to protect the low-temperature superconducting switch;
the thermal shield is connected in parallel to both ends of any superconducting coil subset that are spatially symmetric in the superconducting unit, the thermal shield is configured to transfer a magnetic energy in a superconducting coil during a quench process;
the superconducting coil subset is composed of one superconducting coil or a plurality of superconducting coils, or composed of one superconducting sub-coil or composed of the one superconducting sub-coil and the one superconducting coil, wherein the one superconducting sub-coil is a part of the one superconducting coil.