Commutator motor with a magnetic field deflecting moving charge carriers in the commutator brush
US6114792A · kind A · utility
3Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | May 18, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially behind the brushes (6), such that the magnetic field (M) deflects the moving charge carriers in the brushes (6), to thereby reduce the current density at the trailing edges (6.2) of the brushes (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.