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 centrifugal fan includes a centrifugal impeller rotatable around an axis of rotation; a drive motor of the centrifugal impeller; a casing including a central portion for housing the motor and the centrifugal impeller and a tangential outlet channel in communication with the central portion. The casing has an inlet opening in the central portion and an outlet opening in the tangential outlet channel. The fan includes a system for cooling the motor including the impeller, a ventilation channel operating between the tangential outlet channel and the central portion for generating a flow of cooling air, a collar integral with the centrifugal impeller extending axially from the centrifugal impeller around the motor and a plurality of blades of the motor for generating a tangential cooling component which combines with the flow of cooling air and generating as a resultant, a helical vortex around the motor.

Abstract: Described is a rotating electrical machine integrating an electronic module comprising a printed circuit, a plurality of electronic power and signal components positioned on the components side of the printed circuit, a plurality of conductor tracks, positioned on the welding side opposite the components side of the printed circuit, which implement the direct electrical connections between the electronic power components; the electronic power and signal components are in contact through a filler with the cap of the electrical machine for allowing an optimum dispersal of the heat generated by them, the contact being guaranteed by elastic elements which press on a support in which the electronic module is housed.

Abstract: An electric drive (1) comprises: a permanent magnet brushless motor (2), a motor (2) power supply bridge (3), a circuit for controlling the power supply bridge (3) according to rotor position and phase currents (IS); the drive (1) comprises a circuit (6) for detecting the zero crossings of the induced counter electromotive force (ES) in the stator windings to determine the position of the rotor and a circuit (25) for indirectly detecting the amplitudes of the phase currents (IS).

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: 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: 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 fan module, particularly for cooling motor vehicle engines allows for improved cooling of the fan motor. The fan housing (101) in which the fan motor (105) is arranged has fixed air-channeling elements (109) which are arranged in the region of a fan hub (2) of the fan wheel (1) driven by the fan motor (105) and which only partially cover an outlet cross section (102, 118) defined by the fan housing (101).

Abstract: An electric machine, especially a brushless DC motor. Said electric machine comprises a rotor and a stator which is provided with current-carrying coils. Said rotor, in the circumferential direction, is provided with a plurality of permanent magnets that are embedded in respective magnet retainers between the peripheral surface and the shaft of the rotor in such a manner that the permanent magnets, in the radial direction, are completely encircled by the peripheral surface of the rotor. In the area of the magnet retainer, recesses extend laterally in the circumferential direction of the rotor and axially within the rotor.

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: The invention relates to a method carried out with simple means for determining the position of the rotor in a sensorless and brushless multi-phase electric motor (1) in addition to a device particularly suitable for carrying out said method. According to said method, a phase voltage (Uv) on the clamping side on said motor phase is to be detected after clamping a first motor phase (V) from the reference potentials (UZ,M) of an intermediate circuit (7) during a detection period (TE), via which the detection period (TE) determines a peak value (Uv*) of the detected phase voltage (Uv), the peak values (Uv*) are to be compared to the comparative value (Uc), and a positon signal (SP) is to be produced when the peak value (Uv*) exceeds the comparative value (U0).

Abstract: A cooling fan (1) for a motor vehicle has a fan wheel (4) and a brushless fan motor (2) which is used to drive the fan wheel (4). The fan motor (2) has an internal rotor (3). The fan wheel (4) is directly connected to the internal rotor (3) in order to reduce the size of the type of cooling fan (1) whilst retaining the power output.

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: An electromotor has an external stator, and a ventilator vessel which is used to produce a cooling air flow for self-ventilation of the electromotor. In order to improve the cooling of an electromotors, it is proposed to use a ventilator vessel to help direct an air flow along the outer surface of the motor housing, through the inside of the housing of the electromotor and through an air gap formed between the motor housing wall and ventilator vessel.

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 ventilation unit for motor vehicles comprises a tubular element (5) fitted, through an opening (4) in the chassis (1) of the motor vehicle, and a hub (8), coaxial with the tubular element (5), which mounts an electric motor (10) for driving an impeller (12) fitted with blades (15); the motor and impeller are supported y connecting means (7) which are provided between the tubular element (5) and the hub (8) and which define a grille (20) for protecting the opening (4); these connecting means are suitably shaped to define means for regulating the air flow generated by the impeller (12), in such a way as to increase efficiency and reduce noise; the unit (2) also comprises a cover (21) for protecting the motor (10), fitted with means (24) for quick connection/disconnection to/from the hub (8) and defining, between the hub and the motor, openings (26) to allow the passage of the air flow moved by the impeller in such a way as to cool the motor.

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: A pump is provided with an integrated, electronically commutated wet running engine. The pump contains a single-component pump chamber containing a rotor of the wet running engine. The pump allows the pump chamber to be continuously cleaned during the pumping process by water flowing through so that the water is not severely contaminated.

Abstract: An electric drive (1) comprises: a permanent magnet brushless motor (2), a motor (2) power supply bridge (3), a circuit for controlling the power supply bridge (3) according to rotor position and phase currents (IS); the drive (1) comprises a circuit (6) for detecting the zero crossings of the induced counter electromotive force (ES) in the stator windings to determine the position of the rotor and a circuit (25) for indirectly detecting the amplitudes of the phase currents (IS).