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MAGNETIC STABILIZATION METHOD FOR PERMANENT MAGNET, MAGNETICALLY STABILIZED PERMANENT MAGNET, AND 发明申请

2023-10-20 3970 757K 0

专利信息

申请日期 2025-07-11 申请号 EP20922465
公开(公告)号 EP3933859A1 公开(公告)日 2022-01-05
公开国别 EP 申请人省市代码 全国
申请人 Huawei Technologies Co Ltd
简介 This application discloses a permanent magnet with stable magnetization, and the permanent magnet with stable magnetization may be used on new energy vehicles, wind power generation, energy-saving appliances, smart manufacturing, and other fields. The permanent magnet with stable magnetization has one magnetization direction, the permanent magnet with stable magnetization includes a heavy rare earth element, and the heavy rare earth element is dispersed in the permanent magnet with stable magnetization and has a varying concentration along a direction perpendicular to the magnetization direction. When magnetic stabilization processing is performed on the permanent magnet with stable magnetization, a permanent magnet with stable magnetization that meets different requirements on resistance to demagnetization at different positions can be obtained simply by forming, on a first face of a permanent magnet substrate, a thin film with a varying thickness or a thin film with a varying concentration of the heavy rare earth element. In addition, this further reduces a usage quantity of the heavy rare earth elements.


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