Anisotropic bonded magnet and preparation method thereof
US12142403B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 26, 2021 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | May 26, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An anisotropic bonded magnet and a preparation method thereof are provided. Through a method of stacking magnets which are different in content of SmFeN and/or have different densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method avoids the phenomenon of non-uniform magnetic field orientation and density in a height direction during orientation and densification as well as the phenomenon of low in the middle and high at two ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.