Interior permanent magnet motor and rotor
US7923881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2008 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Jan 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric machine includes a stator and a rotor core positioned adjacent the stator and rotatable about a longitudinal axis. The rotor core includes a plurality of bar apertures, a plurality of elongated flux barriers separate from the bar apertures and positioned radially inward of the bar apertures, and a plurality of magnet slots separate from the bar slots and positioned radially inward of a portion of the bar apertures. The electric machine also includes a plurality of magnets, each positioned in one of the magnet slots. A plurality of conductive bars are each positioned in one of the bar apertures and includes a first end and a second end. A first end ring is coupled to the first end of each of the bars and a second end ring is coupled to the second end of each of the bars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.