公开(公告)号：US20230137679A1

公开(公告)日：2023-05-04

申请号：US17622864

申请日：2021-04-25

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yunxing SONG ,  Liang LI

IPC: H01F6/02 ,  H01F6/04 ,  H01F6/06 ,  H02H7/00

Abstract: The disclosure discloses a superconducting magnet system and a quench protection circuit thereof. The quench protection circuit includes: a superconducting unit, a first diode integrated element, a second diode integrated element, a third diode integrated element, a low-temperature superconducting switch, a thermal shield and a vacuum vessel. The superconducting unit is composed of M superconducting coils connected in series. The low-temperature superconducting switch is connected to the first superconducting coil and the M-th superconducting coil. The first diode integrated element is connected in parallel with the low-temperature superconducting switch; the thermal shield and the second diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subsets in the superconducting unit. The vacuum vessel and the third diode integrated element are connected in series and then connected in parallel at both ends of any symmetrical coil subset of the superconducting unit.

公开(公告)号：US20220344088A1

公开(公告)日：2022-10-27

申请号：US17595633

申请日：2021-05-08

Applicant: Huazhong University of Science and Technology

Inventor： Liang LI ,  Quanliang CAO ,  Xiaotao HAN ,  Yuwei JU

IPC: H01F13/00

Abstract: The present invention belongs to the technical field of magnetically controlled soft-bodied robots, and more specifically, relates to a controllable and reconfigurable magnetization system and method for a magnetic soft-bodied robot. The system comprises a pulse power supply module, magnetizing coil units axisymmetrically arranged up and down, and a magnetic soft-bodied robot placed between the upper and lower magnetizing units. By means of changing the relative current flow direction of the upper and lower magnetizing coil modules, radial and vertical magnetic fields can be generated between the magnetizing coils arranged oppositely without any mechanical movement, so that the internal magnetization direction of the magnetic soft-bodied robot can be configured simply and flexibly. The present invention realizes for the first time the particle magnetization and synchronization of bidirectional orientations, and decouples the material preparation process of the magnetic soft-bodied robot from the magnetization process, so that the entire manufacturing process is very simple. Moreover, the internal magnetization distribution is reconfigurable, which provides a completely new technical approach for realizing multifunctional magnetic soft-bodied robots.

公开(公告)号：US20230377797A1

公开(公告)日：2023-11-23

申请号：US18351436

申请日：2023-07-12

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Liang LI ,  Yiliang Lv

IPC: H01F41/02 ,  B22F3/00 ,  B22F3/087

CPC classification number: H01F41/0266 ,  B22F3/003 ,  B22F3/087 ,  B22F2202/05

Abstract: A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.

公开(公告)号：US20220221539A1

公开(公告)日：2022-07-14

申请号：US17707963

申请日：2022-03-30

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiaotao HAN ,  Zelin WU ,  Qinying LIU ,  Qi CHEN ,  Quanliang CAO ,  Liang LI

IPC: G01R33/381 ,  G01N24/08 ,  H01F7/20

Abstract: Disclosed are a pulse magnet device based on magnetic flux compression, and a high-flux measurement method. The device includes a diamagnetic block, reinforcing plates, screw rods and a magnet coil. The diamagnetic block and the magnet coil are concentrically arranged in the axial direction; the reinforcing plates are arranged at ends of the magnet coil and the diamagnetic block and are connected by means of the screw rods. The diamagnetic block is used for inducing the induction current opposite the coil current during the discharge of the magnet coil, and for compressing the magnetic field to the area between the diamagnetic block and the magnet coil. The intensity and uniformity of the magnetic field around the magnet coil are improved by means of increasing the magnetic flux density.

公开(公告)号：US20230065221A1

公开(公告)日：2023-03-02

申请号：US17799928

申请日：2021-10-22

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yunxing SONG ,  Liang LI

IPC: H01F6/02

Abstract: The disclosure belongs to the field of quench protection of a superconducting magnet system and specifically relates to a quench protection circuit for a superconducting magnet system based on a distributed heater network including M superconducting coils connected in series and a heater network formed by N heater modules, where M>N and N≤3. Different heater modules are connected in parallel with different superconducting coil subsets, and all superconducting coil subsets have spatial symmetry. Each heater module has m parallel branches, and each parallel branch has n heaters connected in parallel, where m≥1, n≥1, and when N=1, m>1. Each heater in the heater network is thermally coupled to one superconducting coil among the M superconducting coils, and each superconducting coil is thermally coupled to at least one heater in each heater module.

公开(公告)号：US20220344097A1

公开(公告)日：2022-10-27

申请号：US17434415

申请日：2020-12-03

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Liang LI ,  Yiliang LV

IPC: H01F41/02 ,  B22F3/087 ,  B22F3/00

Abstract: A compression-molding method for a permanent includes: providing a drive coil to generate an electromagnetic force when a transient current is passed into the drive coil, so as to apply a molding compression force to magnetic powder under compression, and providing an orientation coil to generate an orientation magnetic field when a transient current is passed into the orientation coil, thereby providing the magnetic powder under compression with an anisotropic property; and synchronously passing the transient currents to the drive coil and the orientation coil to synchronously generate the electromagnetic force and the orientation magnetic field, thereby completing compression-molding of the permanent magnet, wherein a magnitude of the electromagnetic force and an intensity of the orientation magnetic field are respectively changed by changing peak values of the transient currents.