公开(公告)号：US11948732B2

公开(公告)日：2024-04-02

申请号：US18351436

申请日：2023-07-12

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Liang Li ,  Yiliang Lv

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

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：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：US11756729B2

公开(公告)日：2023-09-12

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

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.