Low noise synchronous motors
US4025810A · kind A · utility
25Cited by
11References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Aug 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Longitudinally extending radially-projecting and peripherally-spaced teeth on a stator member and rotor member of a synchronous electric motor, whose rotor member is magnetized by a permanent magnet, are skewed relative to each other. The overall peripheral distance of each tooth on one member is equal to or less than the space between the overall peripheral distances of the teeth on the other member. According to one embodiment the rotor teeth are skewed relative to the rotor axis and the stator teeth parallel thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.