公开(公告)号：US11493581B2

公开(公告)日：2022-11-08

申请号：US17707963

申请日：2022-03-30

申请人： HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Xiaotao Han ,  Zelin Wu ,  Qinying Liu ,  Qi Chen ,  Quanliang Cao ,  Liang Li

IPC分类号： G01R33/381 ,  H01F7/20 ,  G01N24/08 ,  G01R33/02 ,  H01F27/28 ,  H01F7/06

摘要： 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：US11471926B2

公开(公告)日：2022-10-18

申请号：US17283956

申请日：2020-06-13

申请人： HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Xiaotao Han ,  Zelin Wu ,  Qi Chen ,  Quanliang Cao ,  Liang Li

IPC分类号： B21D26/14 ,  B21D43/00 ,  H01M8/0208 ,  H01M8/0258 ,  H01M8/10

摘要： Electromagnetic manufacturing method and forming device of mesoscale plate are provided. The manufacturing method includes: oppositely and parallelly disposing a first workpiece to be formed on top of a mold, side-press restraining two ends of the first workpiece, and disposing a deceleration block on two sides of the mold; controlling the first workpiece to tend toward the mold and to be deformed under the drive of uniform electromagnetic force; and colliding a middle area of the first workpiece firstly with the mold under the drive of uniform electromagnetic force, and driving the speed of the middle area of the first workpiece to decelerate to zero. When an area close to the two ends collides with the deceleration block and until the speed of all areas of first workpiece decelerates to zero, forming is completed. Shaping is tending further toward the mold through electromagnetic force until completely fitted to the mold.

公开(公告)号：US11346866B2

公开(公告)日：2022-05-31

申请号：US17288000

申请日：2020-12-03

申请人： HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Xiaotao Han ,  Shaozhe Zhang ,  Yilin Wang ,  Jianfeng Xie

IPC分类号： G01R15/20 ,  H03F3/21

摘要： A fast-response direct-current current transformer based on multi-sensor fusion is provided and includes: a magnetic modulator, a current correction module, an excitation transformer, an alternating current detection and filtering circuit, a phase-sensitive demodulation and filtering system, a PI controller, and a power amplifier. The current correction module measures a primary current and obtain a feed-forward signal, outputs a false balance state configured to control a magnetic core to quickly exit or avoid entering magnetic saturation after amplifying the feed-forward signal and a PI control signal, and keeps output of the magnetic modulator stable. The magnetic modulator and Hall current sensors are fused in the disclosure, such that the possibility of failure due to a false balance problem caused by saturation of a magnetic core is reduced. After the false balance is generated, the magnetic core may be controlled to quickly exit a magnetic saturation state through a feed-forward output current.