Tooth saturation for reduced electromagnetic harmonics
US6664696B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The tooth saturation level is improved and electromagnetic harmonics reduced by reducing the path cross-section of area in the tooth with a geometrical means such as punched holes through the stator laminations. The punched holes alter the magnetic flux pattern by forcing the flux to go around the holes, providing a greater concentration of the flux within regions of the teeth, as well as, depending on the position of the hole along the long axis of the tooth, redistributing the flux density in the air gap. This redistributed flux density will also reduce the harmonics to improve the electromechanical device electromagnetic performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.