Rotary electric motor having a plurality of shifted stator poles and/or rotor poles
US6727629B1 · kind B1 · utility
13Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jul 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/15
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary electric motor has a stator with a plurality of axially spaced sets of corresponding stator and rotor elements. The stator of each set is an annular ring with poles circumferentially positioned about an axis of rotation. The rotor of each set has a plurality of permanent magnets disposed circumferentially along an annular air gap opposite the stator poles. The permanent magnets of adjacent rotor element sets and/or the poles of adjacent stator sets are offset from each other in the axial direction to cancel the effects of cogging torque produce by each of the sets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.