Abstract: The invention relates to an electromagnetic contactor including: —first and second magnetic cores, the second core being mobile relative to the first core; —a control rod mobile between an inoperative position and a supply position, the control rod comprising a shoulder, in inoperative position: —the shoulder comprises one surface in contact with the first magnetic core, —the first magnetic core and the control rod separating a first chamber extending between the first and second magnetic cores and a second chamber in which the contact plate is located, and —at least one opening made between the first chamber and the second chamber allowing the transfer of air from the first chamber to the second chamber when the second magnetic core moves from the inoperative position to the magnetized position.

Abstract: A starter battery voltage step-up device (LPF) intended to prevent a drop in the battery voltage (Vbat) produced by a current surge in a power circuit of the starter when the starter is powered on. The device comprises a casing of magnetic material (C, YO, CM, CM?), a primary winding circuit (W1) intended to be inserted in series in the power circuit, and a short-circuited secondary winding circuit (W2), in which the primary winding circuit (W1) and/or the secondary winding circuit (W2) comprises a winding formed by at least one flat conductor (3) wound on edge. The invention also relates to the corresponding combination (1) of a starter and a voltage step-up device.

Abstract: The inventive method is of the type of those comprising a control stage for driving mode operation of the machine (12) in which currents of the phases in phase windings (u, v, w) of a stator (10) of the machine, which is connected to an on-board power system (2, 15) supplied by a battery (2) providing a predetermined nominal voltage (Ubat), is “full wave” controlled. In accordance with the invention, the control stage is preceded by a pre-magnetizing stage of the stator in open circuit, in which an electromotive peak force between phases substantially equal to the nominal voltage is created by a rotor excitation current (Ir) of a rotor (8) of the machine.

Abstract: In order to carry out the encapsulation of electronic components, the invention proposes to cover the electronic components (7) with a heat-polymerisable material corresponding to a composition comprising a diimide constituent and a diamine constituent, in which the diimide constituent has been predissolved in the diamine constituent, and to heat the assembly obtained under conditions suitable for carrying out the curing of the material by an addition polymerization reaction between said diimide constituent and the diamine constituent. The invention finds an application in particular in the field of electronic power modules.

Abstract: The invention relates mainly to a starter for a heat engine of a motor vehicle comprising: at least one electromagnetic contactor comprising a positive output terminal, at least one electric motor, the electric motor comprising: at least one brush cage (43), at least one positive brush (35) mounted in the brush cage (43), an electrical path (91) between the positive brush (35) and the positive output terminal (32), and at least one thermal protection (96) situated in the electrical path (91), in which the thermal protection is suitable for disconnecting the two elements (93, 95) when the thermal protection has a temperature above a temperature threshold to electrically disconnect the positive output terminal relative to the positive brush (35).

Abstract: A contact device (15) of a starter contactor (1) comprising:—a contact rod (17) made of an electrically insulating material,—a contact strip (19) made of an electrically conducting material comprising a hole (19a) in which is mounted the contact rod (17),—a squashing spring (25),—a restoring spring (27), the contact device (15) also comprises a closure clip (33) of radial width greater than or equal to the diameter of the squashing spring (25), a radial notch (33a) being made in the closure clip (33), the radial notch (33a) receiving a portion of the contact rod (17), the squashing spring (25) being mounted compressed between the closure clip (33) and the contact strip (19) which is in abutment on a retaining collar (17a) of the contact rod (17).

Abstract: A polyphase electric motor (1) of a motor vehicle which includes a rotor (6) and a stator (2, 5, 13) surrounding the rotor and including a plurality of stator windings (5) around stator teeth (4, 19) defined by notches (3) in a stator magnetic mass (2). According to the invention, the motor includes a device for determining an angular position (17) and/or the speed of rotation of the rotor, including a plurality of magnetic field sensors (18) which are stationary relative to the stator. The sensors are arranged in notches (3) and comprise large casing surfaces extending in planes that are tangential to the stator magnetic mass, such that the sensors detect only a radial component of the magnetic field inside the stator magnetic mass.

Abstract: An electronic assembly (10) for an electrical rotating machine. The electronic assembly comprises a plastic overmoulded casing component (100) comprising housings (101) for receiving power modules (200), a power-conducting part overmoulded in the casing component and comprising a plurality of ground and phase traces (103a, 103b. 102), assembly openings (104?, 104a, 104) for receiving means (114) for mounting each power module on the casing component, the power modules comprising a conductive support whereon power switches (2020) and signal components (2030) are mounted, the conductive support (2010) comprising a power connector (2011) connected to the power-conducting part of the casing component and at least two phase connectors (2012a, 2012b) connected to the phase traces (103a, 103b) of the casing component, and a lower ground plane (300) suitable for receiving the casing component and for being mounted on a dissipation unit of the electrical rotating machine.

Abstract: The invention relates to a rotary electric machine which comprises: a stator provided with a body; a casing in at least two parts; an annular chamber for cooling the machine (30) delimited by an outer wall (23) that belongs to one of the parts of the casing (2, 3) and is made of a mouldable material such as aluminium; and an inner wall (31) belonging to a steel part (31) which is thinner than the outer wall (23) and shaped so as to have a region (33) for mounting the stator body and two docking regions (22, 24) each having a seal (36) by virtue of their arrangement on either side of the mounting region (33) of the stator body.

Abstract: The invention relates mainly to a rotary electrical machine comprising a rotor (10) provided with a body (12) with an axis (X), the rotor body (12) comprising a plurality of longitudinal cavities (16) each designed to receive at least one permanent magnet (13); magnetic poles each formed by the permanent magnets (13) accommodated in two adjacent cavities (16) forming a “V” on a plane (P) orthogonal to the axis (X) of the rotor body (12); the rotor (10) comprising at least one part (35) for retention of the permanent magnets (13) in the cavities (16), characterised in that the retention part (35) comprises two elongate strips (36), each strip (36) comprising at least one boss (37) which is designed to apply a force of retention of the corresponding permanent magnet (13) in the cavity (16), and in that the retention part (35) additionally comprises at least two connection arms (40) between the two strips (36), with the boss (37) extending axially between the two connection arms.

Abstract: System (17) for managing a supply voltage (B+A) of an onboard electrical network of a motor vehicle comprises a device (2, 4, 9, 16) for regulating the supply voltage and a device (10, 11) for protecting the onboard electrical network against overvoltages, the two devices together controlling an excitation of an alternator supplying the onboard electrical network. According to the invention, the protection device is separate from the regulating device. An overvoltage signal (OVD) generated by the protection device (11) and controlling the excitation has priority over an excitation signal (EXC) generated by the regulating device. The regulating device and the protection device can be in the form of two separate electronic blocks on separate substrates.

Abstract: A contact-breaker for a heat engine starter comprises a cap, a micro-solenoid having a coil which is stationary relative to the cap, and a core which is translational relative to the cap between a starting position and an end position. At least two contact terminals are stationary relative to the cap. A contact plate is inside the cap and is movable between a deactivated position in which the contact plate is spaced from the contact terminals and an active position in which the contact plate is in contact with the contact terminals. The contact-breaker is characterized in that the contact plate is secured to the core of the micro-solenoid in such a way that the contact plate drives the core of the micro-solenoid towards the starting position of the core when the contact plate moves from the active position into the deactivated position.

Abstract: The invention mainly concerns a stator (9) of a rotary electric machine, in particular intended for an electric compressor for a motor vehicle, said stator (9) comprising a body (16) having: —a yoke (28), —a plurality of teeth (27) angularly distributed on an inner periphery of said yoke (28), —a winding (17) comprising a plurality of coils (50), each coil (50) being formed by a wire (51) wound around a tooth (27), characterised in that a ratio between a diameter of a conductive portion of said wire (51) and an inner diameter of said stator (9) is of between 3% and 10%.

Abstract: The invention relates mainly to a rotary electrical machine (10) comprising: a rotor (12) comprising permanent magnets (39); a stator (11) comprising a body (16) and a three-phase winding (25), characterised in that: the coupling of the coils (26) is of the triangle-series type; and the product of the number of turns of each coil (26), of the axial length of the stator body (16) expressed in mm, and of the inner diameter (L2) of the stator body (16) expressed in mm, is contained between 38998 and 39142; the number of turns being contained between 23 and 37, the axial length of the stator body (16) being contained between 17 mm and 27 mm, and the inner diameter (L2) of the stator body (16) being contained between 62 mm and 67 mm.

Abstract: The invention relates mainly to a starter for a heat engine of a motor vehicle comprising: at least one electromagnetic switch comprising a positive output terminal, at least one electric motor, said electric motor comprising: a stator comprising coils, each of the coils being wound around a pole piece to form a pole, at least one brush cage (43), at least one positive brush (35) mounted in said brush cage, an electrical path between said positive brush (35) and the positive output terminal (32), and at least one thermal protection (96) located in said electrical path, in which said thermal protection is able to disconnect said two elements (93, 95) when the thermal protection has a temperature above a temperature threshold for electrically disconnecting said positive output terminal with respect to said positive brush (35).

Abstract: The present invention concerns a protective cover (400) designed to cover power, filtering and control modules of an electronic assembly for a rotating electric machine for a motor vehicle.

Abstract: A rotary electric machine stator (2) includes a stator body (20) and a stator winding (22) supported by the stator body (20), in which the stator body extends around an axis (X) while being delimited by an internal radial surface (3) and an external radial surface (4), said stator bodies having a plurality of teeth (6) formed respectively between two slots (5) arranged in said stator body from the internal radial surface and extending axially to receive at least one stator winding element (22). The stator has at least one deformed tooth (6) which comprises, at its loose end (7) helping to define the internal radial surface, at least one protrusion (10) extending across an adjacent slot, said protrusion (10) being obtained by material deformation of said deformed tooth (6).

Abstract: The invention relates to a method for rotational positioning of a heat engine rotor (3) that is in a stopped position (?A) to a target position (?0), comprising the following steps: a device for detecting the angular position of the rotor (3) determines an angular difference (??) from the target position (?0), a speed set-point (?c(?)) as a function of the angular position (?) of the rotor (3) is established from the angular difference (??), with a rising slope less than a predetermined value (a) followed until a high speed value is reached less than a predetermined value (?0), and a falling slope less than a predetermined value (b), the rotor (3) is set in motion following the speed set-point (?c(?)).

Abstract: A brush-holder for a motor vehicle starter comprising at least one first electrically conductive cage receiving a first brush having a first polarity, at least one second cage receiving a second brush having a second polarity different to the first polarity, at least one support plate on which the first cage and the second cage are attached, the support plate being electrically connected to the second polarity, and a deformable heat-sensitive member that is deformable from a pre-defined temperature, wherein the deformable member is arranged so as to electrically insulate the first cage relative to the support plate and wherein it further comprises a means for moving the first cage or the support plate in such a way as to establish contact between the first cage and the support plate following a deformation of the deformable member.

Abstract: The invention mainly relates to a method for controlling a rotating electrical machine (7) interacting with a motor vehicle gearbox (1), characterized in that, during a phase of synchronization between two speed ratios (R1-Rn) during which the rotating electrical machine (7) is controlled for speed and there is a change of the type of modulation with transition from modulation of the full-wave type (FW) to pulse-width modulation (PWM), said method comprises a control step with the aim of limiting the variations of an output current of an inverter during the phase of change of the type of modulation without compensation of torque variations.