Patent ID: 8487490
Filing Date: 2013-07-16
Classification: H02K

Abstract:
1. An electric rotating machine comprising a rotor rotating relative to a stator, the rotor rotating a first fan placed at a first end of the stator, and a second fan placed at a second end of the stator opposite to the first end, the first and second fans being configured to generate at least two air flows from the first fan to the second fan through the rotor and the stator, the first fan comprising an external ring connecting the radial ends of blades together, a first air flow being able to flow in at least one channel arranged between the stator and a casing of the machine, a second air flow flowing in a gap between the rotor and the stator, the first and second air flows joining before reaching the second fan, the external ring being configured to minimize the pressure drop at the end of a blade of the first fan and create an axial component in the air flow from the first fan which is blown up onto faces of the winding overhangs of at least one of the stator and the rotor.