Armature rotors of electromagnetic brakes
US4811822A · kind A · utility
26Cited by
14References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Feb 17, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K49/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To improve the cooling of the rotor armature disc of an electromagnetic brake, connecting to an external web by a ring of arms forming ventilation fins, the web bounding with the disc and the portions of fins which connect it to this disc, channels for ventilation air, on one at least of the surface bounding the channels internally, striae or ondulations are provided constituted by ribs extending in directions inclined to the direction of flow of the air in the channels. The ratio between the spacing of the sucessive ribs and the height of these ribs is comprised between 5 and 15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.