Brushless rotary electric machine
US8400028B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Aug 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/207
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a brushless AC generator for a vehicle, with improved cooling performance for an exiting core and an exciting coil. In the brushless AC generator for the vehicle, a rotor includes: magnetic-pole cores fixed to a shaft; a cylindrical exciting core fixed to a rear bracket, the exciting core being inserted into one of the magnetic-pole cores; and an exciting coil formed by winding a conductor around a minor-diameter portion of the exciting core. The rear bracket includes: vent holes for the rotor, through which cooling air generated by rotation of a cooling fin passes, the vent holes for the rotor being formed around a bearing housing portion for housing a rear bearing therein; and a guiding portion including an air duct for guiding the cooling air, which has passed through the vent holes for the rotor, to the exciting core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.