Brief description of embodiments of a device for rotating electrical machine, the ventilator fan and device for implementing this process

摘要

The invention relates to a ventilation device for a rotating electric machine, provided with a rotor having at least two individual ventilators (22, 23), an upper an lower ventilatoor respectively, which are superimposed or fixed one on top of the other in the axial direction thereof, the upper ventilator (22) having a smaller external diameter than the lower ventilator (23) for fixing to a front face of the rotor of the rotating electric machine. The invention is useful in alternators or combined alternator - starter motors on motor vehicles.