Low-speed high-torque motor
US4890024A · kind A · utility
14Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A large number of teeth are formed on the outer circumference of a rotor. A stator is disposed around the rotor. The stator has multiple magnetic poles whose number is n times the number of phases. Each pole has formed on its surface a plurality of teeth at a pitch equal to the rotor tooth pitch. The teeth mounted on the adjacent magnetic poles are selected to deviate in pitch one-half or thereabout from the rotor teeth and the adjacent poles are to be opposite phases from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.