Abstract: A shroud comprises a frame having a main opening delimited by a main wall and at least one secondary opening delimited by a secondary opening, for the passage of a cooling air flow; a ventilator mounting system associated with the frame to support the ventilator at the main opening; a panel for closing the secondary opening, connected to the frame and movable, by rotation, between a lowered position and a raised position; the shroud comprises a pin, defining the axis of rotation of the panel, extending through the secondary opening and having a first and a second end respectively connected to a first and a second section of the secondary wall, opposite each other, a pair of hooks being provided in the panel for connection to the pin.

Abstract: A ventilator (1) comprises an electric motor (2) comprising a casing (4), a rotor rotatable inside the casing (4) about an axis of rotation (R), a shaft (5) integral with the rotor and having at least one end portion (6) protruding from the casing (4); the ventilator (1) comprises a fan equipped with a plurality of blades (7), a hub (8) for mounting the blades (7) and comprising a bottom wall (9) for coupling to the shaft (5) and at least one perimeter portion (11) extending from the bottom wall (9) to define a base for connecting the blades (7); the hub (8) is defined by a rigid disc (8) and comprises a plurality of bases (11a) which extend from the bottom wall (9) at each of the blades (7) to define a connecting surface for joining each blade (7) to the bottom wall (9).

Abstract: An axial flow fan comprises a central hub (2) and a plurality of blades (3), each fixed to the central hub (2) and extending from a respective first end (3a) proximal to the hub (2) to a respective second end (3b) distal from the hub (2); the blades (3) are inclined at a keying angle (?) to a rotation plane (R) of the fan which also comprises a plurality of aerodynamic protrusions (11), each extending from a first lateral edge (6) of a corresponding blade (3) in the vicinity of its second end (3b); each protrusion (11) lies in a plane (PP) perpendicular to an axis (A) of fan rotation.

Abstract: A rotor (1) for an electric motor with permanent magnets (10) has a principal axis (D), comprises a laminated core (2) delimited by a first and a second end wall (4, 5) and by a lateral surface (6) and has a hole (7) for coupling to a motor shaft (8) and a plurality of longitudinal slots (9) for housing the magnets (10); the rotor also comprises positioning devices (20) for stabilizing the magnets (10) in the slots (9).

Abstract: A ventilating system, especially for a motor vehicle air conditioning system, comprises: a wall (4) for mounting an axial fan (2), the latter being equipped with a ring-shaped casing (6), with an axis (X), defined externally by a cylindrical wall (7); an electric motor (11) supported by a plurality of radial spokes (10) connected to the ring-shaped casing (6) and having an impeller (12) at the end of its output shaft; a power cable (14) connected at one end to the motor (11) and connectable at the other end to an electrical power source through a connector (14a). The axial fan (2) is mounted on the wall (4), which delimits a space (5) for containing the air conditioning system, at an air opening (3), in such a way that the impeller (12) faces the inside of the space (5) and the motor (11) faces the outside. The ring-shaped casing (6) comprises means (19) for fastening the cable (14) to its cylindrical outside surface (18) and defining a passage (25) for the cable (14) through the mounting wall (4).

Abstract: In an axial fan (1), equipped with a frame (13), a motor (2) and an impeller (3) whose hub (15) is rotationally driven by the motor (2) and where the hub (15) is cup-shaped, with an end wall (16) and an annular side wall (17) to partially contain the motor (2), the motor (2) protrudes from the hub (15) with its longitudinal end (23) which is supported and laterally surrounded by a crown (12) of the frame (13) and the crown (12) has an annular end strip (21) facing the hub (15) and laterally surrounding an annular end strip (22) of the hub (15) which faces the crown (12).

Abstract: An electric ventilator (1) comprises a frame (2), a pair of centrifugal fans (3) mounted on the frame (2), an electric motor (4) for driving the fans (3) and axially interposed between the fans (3), and a unit (5) for controlling the speed of the motor (4); the speed control unit (5) comprises a plurality of electrical switching resistors (7) housed in a box-shaped container (8) that can be closed and sealed; the container (8) is mounted on the frame (2) and has the shape of a bridge so as to surround the casing (13) of the motor (4) without touching it.

Abstract: A ventilator (1) comprises an electric motor (2) comprising a casing (4), a rotor rotatable inside the casing (4) about an axis of rotation (R), a shaft (5) integral with the rotor and having at least one end portion (6) protruding from the casing (4); the ventilator (1) comprises a fan equipped with a plurality of blades (7), a hub (8) for mounting the blades (7) and comprising a bottom wall (9) for coupling to the shaft (5) and at least one perimeter portion (11) extending from the bottom wall (9) to define a base for connecting the blades (7); the hub (8) is defined by a rigid disc (8) and comprises a plurality of bases (11a) which extend from the bottom wall (9) at each of the blades (7) to define a connecting surface for joining each blade (7) to the bottom wall (9).

Abstract: A method for assembling an electric motor of the type having a stator unit (5) and a rotary unit (6) housed in a containment compartment (2a) delimited by a casing (2), includes exposing the compartment (2a) to a different pressure relative to the outside environment and checking for the passage of fluid between the outside environment and the compartment (2a) in order to test the motor (1) hermetic seal.

Abstract: An axial flow fan comprises a central hub (2) and a plurality of blades (3), each fixed to the central hub (2) and extending from a respective first end (3a) proximal to the hub (2) to a respective second end (3b) distal from the hub (2); the blades (3) are inclined at a keying angle (?) to a rotation plane (R) of the fan which also comprises a plurality of aerodynamic protrusions (11), each extending from a first lateral edge (6) of a corresponding blade (3) in the vicinity of its second end (3b); each protrusion (11) lies in a plane (PP) perpendicular to an axis (A) of fan rotation.

Abstract: A ventilation system (1) for vehicles comprises an electric ventilator (2) in turn comprising a fan (4), an electric motor (3) for driving the fan (4) and a microcontroller (6) installed at the motor (3) for controlling the rotation speed of the fan (4), the microcontroller (6) processes one or more vehicle functional parameters according to which it defines the rotation speed of the fan (4).

Abstract: Described is a direct current motor (1) with permanent magnet stator, having at least four stator poles (5, 6, 7, 8) which are spaced at equal angular intervals about the rotation axis (A) of the rotor (3) and which generate a magnetic field that is asymmetrical about the rotation axis (A) of the rotor (3) and where the rotor winding (4) can be powered partially and selectively at least at two fixed, explementary angular sectors.

Abstract: Described is a direct current motor (1) with permanent magnet stator, having at least four stator poles (5, 6, 7, 8) which are spaced at equal angular intervals about the rotation axis (A) of the rotor (3) and which generate a magnetic field that is asymmetrical about the rotation axis (A) of the rotor (3) and where the rotor winding (4) can be powered partially and selectively at least at two fixed, explementary angular sectors.