Permanent magnet rotary structure of electric machine
US7839045B2 · kind B2 · utility
8Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jul 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/2791
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet motor is provided. The permanent magnet motor includes a stator having a stator shaft having an outer surface, K salient teeth formed upon the outer surface, and K winding slots formed among the K salient teeth, and a rotor having a first inner surface facing the outer surface, and P pairs of permanent magnets formed on the first inner surface, each of which has a second inner surface facing the outer surface and at least a groove formed on the second inner surface to reduce a cogging torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.