Permanent magnet embedment rotating electric machine, motor for car air conditioner, and enclosed electric compressor
US7667363B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Feb 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Outer circumference of a rotor is alternately provided with a plurality of circumferential portions and a plurality of convex portions. Straight lines each connecting a rotational axis to one of circumferential centers of circumferential portions are referred to as radial lines. Straight lines each bisecting one of convex portions are referred to as bisectors. A plurality of magnetic flux blocking regions are located on a rotor. One of the magnetic flux blocking region is located in a range between the radial line and the bisector adjacent to and preceding the radial line in the rotation direction. Therefore, a permanent magnet embedment rotating electric machine is capable of preventing decreases in torque and suppressing torque ripple.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.