Electric machine, in particular commutator machine
US8917008B2 · kind B2 · utility
0Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2009 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Jan 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K13/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electric machine, in particular a commutator machine (10), the carbon brushes (14) of which cooperate with a commutator (13) to supply the rotor with current, the carbon brushes (14) being continuously provided or provided in layer sections with different additives such as scouring material, lubricants or similar. To achieve a longer service life for the carbon brushes (14), a maximum of half, preferably less than half of all the carbon brushes (14) of the machine have a significant fraction of an additive, said fraction differing from that of the other carbon brushes (14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.