Abstract: A ventilation device includes a centrifugal fan (24) capable of rotating in one or both directions, placed in an air inlet chamber (C) and delivering air towards the motor (1). The air stream (F1) delivered by the fan (24) is split into an inner stream (F2), directed towards the interior of a confinement space (E) containing at least the rotor (5) of the motor (1), and an outer stream (F3) directed towards ducts (31) for cooling the stator (8) of the motor (1). The cooling obtained is particularly effective while the risk of soiling the motor is low.

Abstract: A system for ventilating a rail traction motor and for dynamically purifying the ventilation air, the system comprising a centrifugal fan (1) having radial blades (2) surrounded by a circular housing (3) and delivering air to the motor, and dynamic filter means on the path of the air delivered by the fan. The system includes a plane sheet (4) pierced by peripheral through openings (5) forming a diffusing screen and dividing the inside volume of the circular housing into an upstream chamber (6) connected to the air inlet of the fan, and a downstream chamber (7) connected to its outlet leading to the motor, an exhaust outlet (8) for exhausting impure air, the exhaust outlet being in the form of a sector on the periphery of the upstream chamber, and a separator element (9) disposed facing the opening and forming an obstacle to deflect air streams close to the blades of the fan towards a take-up section close to the exhaust opening.