Optimum groove/pole ratio for brushless motor stator profile
US5739620A · kind A · utility
6Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stator for a single-phase axially wound brushless motor with a diametrical air-gap has a plate structure with at least one plate whose profile comprises: a central circular hole; a plurality of salient poles surrounding the central hole with each salient pole having a symmetrical profile; and a groove opening for every two adjacent salient poles. The ratio of the included angle of the two sides of a groove opening divided by the pitch angle of salient poles is between 0.55 to 0.68.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.