Magnetic drive
US4146805A · kind A · utility
10Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1975 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Dec 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K49/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The drive uses a recessed wall or partition between the pole-rings of the two rotors to substantially diminish the occurrence and strength of eddy currents. The recesses may be in the form of grooves, depressions or axial bores which reduce the mass of the wall. The wall is further reinforced by non-magnetic electrically non-conductive or insulated elements of high tensile strength to compensate for the reduction in strength caused by the grooves, depressions or bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.