Abstract: A device which is used to cool the power electronics of a vehicle, by circulating a liquid through a cooling circuit which is mounted under a plate bearing the power electronics. According to the invention, the cooling circuit can include deflectors and/or turbulators in order to increase the exchange coefficient between the cooling circuit and the cooling liquid. The invention also relates to a method of producing the device.

Abstract: The invention relates to a rotating electrical machine, provided with a stator, a cooling device comprising at least one fan that initiates a coolant flow in order to cool and evacuate, to the outside, the heat produced in the machine comprising at least one heat pipe having at least one heat absorption area, and at least one condensation area. Said heat pipe belongs to a device that rectifies the current produced by the stator of the machine et which extends with its condensation area until reaching the flow of the coolant. The invention can be used for alternators or for alternating current starters in automobiles.

Abstract: The ventilating device fixed on a rotor of a rotary electrical machine, comprises a first fan (62a) having a radial plate portion (64a), at least one second fan (62b) having a radial plate portion (64b), and means for fastening the two fans (62a, 62b), each fan (62a, 62b) having, at the outer peripheiy of its radial plate portion, first branches (78a) and second branches (78b) which extend radially outwards, at least some of the branches having a blade (68a, 68b), while at least one first branch (78a) and at least one second branch (78b) includes a first (78a) and a second (78b) mutual overlapping portion to define an overlap zone (Z), the said fastening means (80, 82) being at least partly arranged at the level of the overlap zone.

Abstract: A retarder (100) including a stator (170) and/or a housing (102) surrounding or encasing a rotor (101), a mechanism (140-142) for producing an air current and at least one inlet (120) enabling air current to enter and at least one outlet (120) used to evacuate the air current. The outlet (121-123) is created between two cooling chambers (111-112) or through several cooling chambers which are borne by the housing and/or stator of the retarder.

Abstract: The invention concerns a rotating electrical machine comprising an outer shell, a stator, a rotor, and a fan with blades arranged on one first axial side of the rotor, the shell having on its outer periphery radial ports consisting of each of an opening subdivided by fins each elongated according to a particular profile of its own, at least one fin of at least one of the radial ports is inclined such that the edges of the blades facing said port sweep gradually across the fin according to its profile while rotating about the rotary shaft, in a shearing movement whereby each time only one substantially point-shaped portion of the edge of the blade is opposite the fin.

Abstract: The section of a cooling channel or conduit for a rotary electric machine comprises at least one tube which is mounted along at least one coolable part thereof and is provided with input and output axes, at least one coolant input and output connections, wherein the tube extends between said connections, each input and output connection is oriented at least approximately along the corresponding input or output axis of the tube and has a constant cross-sectional area along the entire longitudinal extent thereof. A rotary electric machine provided with said channel or conduit is also disclosed.

Abstract: A device which is used to cool the power electronics of a vehicle, by circulating a liquid through a cooling circuit which is mounted under a plate bearing the power electronics. According to the invention, the cooling circuit can include deflectors and/or turbulators in order to increase the exchange coefficient between the cooling circuit and the cooling liquid. The invention also relates to a method of producing the device.

Abstract: The invention relates to a rotating electrical machine, provided with a stator, a cooling device comprising at least one fan that initiates a coolant flow in order to cool and evacuate, to the outside, the heat produced in the machine comprising at least one heat pipe having at least one heat absorption area, and at least one condensation area. Said heat pipe belongs to a device that rectifies the current produced by the stator of the machine et which extends with its condensation area until reaching the flow of the coolant. The invention can be used for alternators or for alternating current starters in automobiles.

Abstract: The ventilating device, adapted to be fixed on a rotor of a rotary electrical machine, comprises a first fan (62a) having a radial plate portion (64a), at least one second fan (62b) having a radial plate portion (64b), and means for fastening the two fans (62a, 62b), each fan (62a, 62b) having, at the outer periphery of its radial plate portion, first branches (78a) and second branches (78b) which extend radially outwards, at least some of the branches having a blade (68a, 68b), while at least one first branch (78a) and at least one second branch (78b) includes a first (78a) and a second (78b) mutual overlapping portion to define an overlap zone (Z), the said fastening means (80, 82) being at least partly arranged at the level of the overlap zone.

Abstract: This invention relates to a ventilator for an alternator-starter fixed on a rotor (4) with magnetic poles including: a metal insert (13) which is used to fix the ventilator to the rotor: an end shield plate (17) and ventilation blades (12) which are made of a plastic material and which are molded on the metal insert; a magnetic target (14) ensuring metal follow-up of the rotation of the rotor with the aid of at least one associated rotor.

Abstract: The invention is a fan for an alternator adapted to be coupled in rotation to the alternator rotor, and being of the type comprising a wheel part and a plurality of fan blades (47, 48) extending from the latter, the fan being moulded in a plastics material on an insert (50) which is preferably of metal and which constitutes the wheel part of the fan and is arranged to provide fastening of the fan on the rotor, being configured so as to constitute a means for increasing the mechanical strenght of the fan; the insert (50, 65) includes at least a portion of a blade (48, 69) of the fan. The invention is useful in the manufacture of a high power cooling fan for a motor vehicle alternator.

Abstract: The invention concerns a rotating electrical machine, comprising inside a housing, a fixedly mounted stator and a rotor rotatably mounted in the stator, the ventilating system including in particular at least one ventilator integral with the rotor and capable of generating a cooling air stream inside the housing, radial air intake orifices (20) arranged in the housing, and cooling air discharge ports (22) arranged in said housing in a ring opposite the periphery of the ventilator and mutually separated by fins (24) stiffening the housing in the port region. The system is characterized in that the angle of inclination of the fins (24) relative to the tangent perpendicular to the radial direction (R) ranges between 38° and 52°. The invention is for use for motor vehicle alternators.

Abstract: The invention relates to a rotary electrical machine which comprises a stator and a rotor, the rotor having zones which are arranged for balancing operations to be performed on them, together with at least one fan which is adapted to be mounted on the rotor and which includes a radial plate portion (3) and fan blades, wherein the fan fixed on the rotor is pre-balanced. It also relates to a method of fitting this fan in the machine.

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 concerns a rotating electrical machine, comprising inside a housing, a fixedly mounted stator and a rotor rotatably mounted in the stator, the ventilating system including in particular at least one ventilator integral with the rotor and capable of generating a cooling air stream inside the housing, radial air intake orifices (20) arranged in the housing, and cooling air discharge ports (22) arranged in said housing in a ring opposite the periphery of the ventilator and mutually separated by fins (24) stiffening the housing in the port region. The system is characterized in that the angle of inclination of the fins (24) relative to the tangent perpendicular to the radial direction (R) ranges between 38° and 52°. The invention is for use for motor vehicle alternators.

Abstract: The invention is a fan for an alternator adapted to be coupled in rotation to the alternator rotor, and being of the type comprising a wheel part and a plurality of fan blades (47, 48) extending from the latter, the fan being moulded in a plastics material on an insert (50) which is preferably of metal and which constitutes the wheel part of the fan and is arranged to provide fastening of the fan on the rotor, being configured so as to constitute a means for increasing the mechanical strenght of the fan; the insert (50, 65) includes at least a portion of a blade (48, 69) of the fan. The invention is useful in the manufacture of a high power cooling fan for a motor vehicle alternator.

Abstract: A rotating electric machine comprising at least a fan (43) provided with blades providing between them divergent ventilation channels (48) adapted to generate cooling fluid flow through the machine; the angle of incidence (B) of the blades, at the leading edge ranges between 150 degrees and 175 degrees, while the angle of incidence (A) of the blades at the trailing edge ranges between 90 degrees and 165 degrees relative to the tangent to a circle (C) generated during the rotation of the blades, the ratio between the average pitch of the blades (46) and the average length thereof being less than 0.975. The invention is applicable to fans for a motor vehicle alternator.

Abstract: The rotating electrical machine comprises at least one fan (43) provided with blades forming between them ventilation channels (48) which diverge and are suitable for producing a flow of cooling fluid through the machine; the angle of incidence (B) of the blades at the level of the leading edge is between 150° and 175°, while the angle of incidence (A) of the blades at the level of the trailing edge is between 90° and 165° relative to the tangent to a circle (C) generated during the rotation of the blades; the ratio of the mean pitch of the blades (46) to the mean length of the latter being less than 0.975.

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.