Alternator having passage for ventilating slip-ring surface
US6515398B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1999 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Oct 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an alternator for use in an automobile, a passage for ventilating air around slip-rings is formed on a rear cover that covers a rear end of the alternator where the slip-rings are disposed. A brush device for supplying exciting current to a rotor through the slip-rings is mounted around the slip-rings, and the axial rear end of the brush device is covered with the rear cover. A space enclosed by the brush device and the rear cover is formed around the slip-rings, and air in the enclosed space is ventilated through the ventilation passage when the alternator is driven. The slip-rings heated through operation are cooled down, and brush powder in the enclosed space is exhausted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.