Synchronous electric machine having auxiliary permanent magnet
US5955807A · kind A · utility
56Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1998 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Apr 27, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous electric machine includes a stator having an armature winding, a rotor having axially laminated magnetic sheets and a field coil, a plurality of permanent magnets disposed in the rotor to form N-pole and S-pole on the outer circumference of the rotor, and ribs and pins magnetically bypassing the N-poles and S-poles of the permanent magnets. The pins also attach the laminated magnetic sheets together as a unit. The rotor has a plurality of axially extending holes on its circumference for accommodating permanent magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.