Stator with nonuniformly spaced teeth for rotating electromagnetic device
US4516048A · kind A · utility
25Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Sep 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic device of the type having a rotor and a stator with magnetically coacting peripheries, with the stator having toothed pole structures, has the stator pole teeth set at nonuniform spacing to improve the operating characteristics of the device. When the device is a stepping motor, improved step accuracy is attained through reduction of residual (or detent) torque. Reduction of airborne noise is reduced in all motor types.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.