Single-phase synchronous motor comprising a two-pole permanent-magnetic rotor and an eddy-current intermediate rotor
US4827171A · kind A · utility
8Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An eddy-current intermediate rotor (13) is fixed to the motor shaft (9) and is arranged to be rotatable between the stator-iron poles and the permanent-magnetic rotor (15) which is mounted for free rotation on the motor shaft (9). The rotor (15) and the eddy-current intermediate rotor (13) are disc-shaped and form a disc assembly (23) which can be axially magnetized via the stator-iron poles (3) on each side of the disc-assembly (23). A centrifugal coupling is provided, which acts to couple the rotor (15) to the eddy-current rotor when the disc assembly has come up to speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.