Abstract: An electric machine (1) comprises; a casing; a stator (3) fixed to the casing and including at least one electrical winding (5); a rotor (4) housed in the casing and rotatably connected to the latter; an electronic circuit (8) for powering the winding (5) at least partly housed in the casing; a cover (2a) for closing the casing to form with the latter a sealed enclosure; a terminal strip (9), accessible from outside the sealed enclosure, for controlling and powering the electronic circuit (8); a heat sink, embodied by the cover (2a), for absorbing the heat produced, in particular, by the electronic circuit (8). The machine (1) also comprises elastic elements (12) operating between the stator (3) and the electronic circuit (8) in such a way as to press the electronic circuit (8) against the heat sink.

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: An electric machine comprises an outer casing (2), a rotor and a stator (3) having at least one polar expansion (5) and at least one winding (8) having an annular shape and placed around the polar expansion (5). The casing (2) has a plurality of protrusions (13) each of which holds, by supporting, a corresponding portion (12) of a stator winding (8) to enable heat exchange between the winding (8) and the protrusion (13). Each portion (12) of the winding (8) is electrically insulated from the respective protrusion (13).

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 making a rotary electric machine comprises the steps of: preparing a core (18) having a plurality of pole expansions and a plurality of windings (100, 200, 300) made of electrically conductive material on the pole expansions, where at least a part of the windings (100, 200, 300) is made from a conductor wire having a free end (14) that can be connected electrically to a mains power supply; stably coupling to each other at least two free ends (14) of different windings (100, 200, 300) so as to connect them to a single power supply terminal; twisting the coupled ends (14) together to form a single electrical termination (5, 6, 7) twisted along a principal line of extension of the electrical termination (5, 6, 7).

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: An electric machine comprises: a casing (2); a stator (3) and a rotor (4) supported by the casing (2), the rotor (4) having at least one rotor winding (7); a commutator (9) connected permanently to the rotor (4) and electrically connected to the rotor winding (7); a pair of brushes (12), each having a first end (12a) maintained in a sliding position with the commutator (9) and electrically connected to respective terminals which may be connected to an electricity mains supply; a pair of brush holder elements (11) supported by the casing (2), each brush holder element (11) being associated with a respective brush (12) to keep it pressed on the commutator (9). Each brush holder element (11) has at least one lateral surface (18) to face a respective butting position (17) of the casing (2), and which may be joined to the butting portion (17) to transmit a thermal power to the butting portion.

Abstract: An electric motor (1) comprises a casing (2), a stator housed in the casing (2), a sealing cover (10), a rotor (6) rotatable inside the casing (2) and equipped with a commutator (7), a circuit (8) for powering the commutator (7) comprising two brushes (15) in sliding contact with the commutator (7); the motor (1) comprises two brush holder sleeves (14) in which the brushes (15) slide and two springs (17) operating between the brush holder sleeves (14) and the respective brushes (15) in such a way as to push the latter towards the commutator (7); both the sleeves (14) and the springs (17) form part of the circuit (8) for powering the brushes (15).

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: An electric machine (1) comprises; a casing; a stator (3) fixed to the casing and including at least one electrical winding (5); a rotor (4) housed in the casing and rotatably connected to the latter; an electronic circuit (8) for powering the winding (5) at least partly housed in the casing; a cover (2a) for closing the casing to form with the latter a sealed enclosure; a terminal strip (9), accessible from outside the sealed enclosure, for controlling and powering the electronic circuit (8); a heat sink, embodied by the cover (2a), for absorbing the heat produced, in particular, by the electronic circuit (8). The machine (1) also comprises elastic elements (12) operating between the stator (3) and the electronic circuit (8) in such a way as to press the electronic circuit (8) against the heat sink.