| 摘要 |
The invention concerns a rotating electrical machine, comprising inside a housing, a fixedly mounted stator and a rotor rotatably mounted in the stator, the ventilating system including in particular at least one ventilator integral with the rotor and capable of generating a cooling air stream inside the housing, radial air intake orifices ( 20 ) arranged in the housing, and cooling air discharge ports ( 22 ) arranged in said housing in a ring opposite the periphery of the ventilator and mutually separated by fins ( 24 ) stiffening the housing in the port region. The system is characterized in that the angle of inclination of the fins ( 24 ) relative to the tangent perpendicular to the radial direction (R) ranges between 38° and 52°. The invention is for use for motor vehicle alternators.
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