Rotating electric machine
US8692435B2 · kind B2 · utility
4Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Oct 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor slot is asymmetrically shaped with respect to a straight line drawn from the central axis of the rotation of the rotor in a radial direction, and has a slot opening, the circumferential width of which is smaller than that of the rotor slot, at the top of the rotor slot, so that a loss generated in the rotor due to a carrier harmonic component can be reduced and the power factor can be improved, enabling a current generated in an armature winding to be suppressed and thereby improving efficiency in a rated operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.