Permanent magnet, motor, and generator
US9715956B2 · kind B2 · utility
2Cited by
23References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2015 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Feb 25, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0596
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The magnet has a composition expressed by RpFeqMrCutCo100-p-q-r-t. The magnet has a metallic structure including a main phase having a Th2Zn17 crystal phase. The main phase has crystal grains. 5% or less of the crystal grains having a grain diameter equal to or smaller than 10 μm, 40% or less of the crystal grains having crystal orientation perpendicular to (001) plane of the Th2Zn17 crystal phase in a direction deviated 30 degrees or more relative to an axis of easy magnetization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.