Vehicular AC generator
US6522046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Mar 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vehicular AC generator comprising a pair of cores included in a rotor and supported by a rotating shaft, a plurality of trapezoidal-shaped claws as magnetic poles protruding on the outer periphery edges of the pair of cores, and a pair of fans attached to the front side and the rear side of the cores, at least one of the fans having an outer diameter in the range between 85% and 96% of the outer diameter of each of the cores, each of the claws having a tapered portion for gradually decreasing the outer diameter of a shoulder portion of the claw in the direction toward the end surface of the core so that the outer diameter of at least one of the cores faced to the at least one of the fans becomes substantially the same as the outer diameter of the at least one of the fans, whereby the sound caused by cutting wind by the rotation of the centrifugal fans can be reduced without deteriorating the cooling efficiency of the coil ends of the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.