Outside rotor electric machine with reduced air gap variation
US7750530B2 · kind B2 · utility
1Cited by
10References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of providing an outside rotor electric machine having a reduced radial air gap variation across an axial length of the air gap, the machine including a rotor having a cylindrical elongated portion supporting magnets and a flange extending at least partially radially from a rotating shaft, the method comprising increasing a radial deflection of the elongated portion in proximity of the flange by connecting the elongated portion to the flange through a radial spring having a stiffness lower than that of the elongated portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.