Fan for a rotating electrical machine, particularly an alternator fitted to a motor vehicle, uses supplementary blades between outer regions of principal blades to provide better air flow

摘要

The fan has a first set of blades (30) forming ventilation passages (40) divergent toward the exterior, and a second set of blades (50) shorter than the first set of blade and mounted in the outer end of the passages formed between the first set of blades.