Permanent magnet machine with different pole arc angles
US8536748B2 · kind B2 · utility
25Cited by
29References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | May 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/7072
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. Asymmetry is achieved by placing adjacent permanent magnets or magnet sets on the rotor periphery with different rotor magnetic pole arc angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.