Permanent magnet electrical machine rotors with stacked annular magnets and retainers and construction methods therefor
US9667109B2 · kind B2 · utility
1Cited by
20References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2012 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Jan 7, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Permanent magnet electrical machine rotors and construction methods can include at least one magnet and at least one retention element. An axial relative force maintained between one or more magnets and one or more retention elements can urge the retention element along one or more magnet surfaces to induce a hoop stress in the retention elements and a compressive stress within the magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.