Abstract: The invention proposes a method of making a rotor (12) for a rotary electrical machine, the rotor including a core (14) on which there is formed at least one electrical winding (16) comprising at least one electrically conductive element (18) which is coated with an outer bonding layer (32), of the type in which the winding step is followed by a step of change of state which causes softening of the bonding material to take place and which then causes it to solidify once more, characterized in that the winding of the conductive element (18) is carried out on the convex outer cylindrical wall (40) of a tubular element (42) of the core, and in that, after the said step of change of state, the tubular element (42) is assembled on a core body (44) in such a way as to minimize the temperature gradient in the winding (16) during the step of change of state.

Abstract: The invention relates to a ventilation device for an electrical machine including a rotor (42) provided externally with reliefs (46) delimiting between them cooling channels (46) in which a cooling fluid circulates and a stator. The rotor is equipped with at least one axial fan (48) suitable for directing an airflow into the cooling channels. The invention can be applied to the ventilation device for a motor-vehicle alternator.

Abstract: The invention proposes a method of making a rotor (12) for a rotary electrical machine, the rotor including a core (14) on which there is formed at least one electrical winding (16) comprising at least one electrically conductive element (18) which is coated with an outer bonding layer (32), of the type in which the winding step is followed by a step of change of state which causes softening of the bonding material to take place and which then causes it to solidify once more, characterised in that the winding of the conductive element (18) is carried out on the convex outer cylindrical wall (40) of a tubular element (42) of the core, and in that, after the said step of change of state, the tubular element (42) is assembled on a core body (44) in such a way as to minimise the temperature gradient in the winding (16) during the step of change of state.

Abstract: The invention relates to a ventilation device for an electrical machine including a rotor (42) provided externally with reliefs (46) delimiting between them cooling channels (46) in which a cooling fluid circulates and a stator.