Three-phase electric motor with a low detent torque
US9515539B2 · kind B2 · utility
2Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2010 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/2781
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to a three-phase electric motor that uses high magnetic energy permanent magnets and that has a low detent torque. The motor consists of a rotor with N pairs of poles and of a stator portion with teeth extending radially from an annular gear. The teeth have windings and the ends thereof comprise an arc of circle, the middle of which is located on a radius R1 and two sides defining an alpha angle, the vertex of which is located on a radius R2. The ratio R2/R1 is substantially equal to (1+/−0.26/N), and the alpha angle is between 110 and 135°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.