Multi-pole rotor particularly for small and miniature electric generators and motors
US4513216A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1977 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Nov 9, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C15/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor for small motors, or generators, having circumferentially arranged segmental poles which extend over the entire axial length of the rotor can be fabricated by molding a pair of elements from particulate magnetic material of high coercivity with a binder in the shape of identical crown gears; the rotor being completed by arranging the elements on a shaft with the toothed portions facing each other in interfitting engagement. Other modifications are disclosed in which the pole pieces may be formed separately from, or integrally with, a radial pole carrier, and the pole carrier may be in the shape of a spool with the segmental pole pieces assembled thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.