Abstract: The rotary electrical machine is capable of functioning as a generator and outputs a continuous output voltage (Ub+) that is adjustable by an excitation current. The digital regulator (2) of the machine comprises an excitation current control means (7) and a control loop (6) that includes a device (10) for measurement, by sampling, of the output voltage (Ub+), the measurement device generating a signal sampled at a predetermined first sampling frequency (F1 e). The machine has a bandwidth that is limited by a predetermined first cutoff frequency (F1 c). The measurement device includes an apparatus for oversampling such that the first sampling frequency (F1 e) is greater than twice the first cutoff frequency (F1 c), and the control loop also includes an apparatus (12) for decimating the sampled signal.

Abstract: A polyphase stator for an internally ventilated rotating electrical machine comprises a body (14) provided with slots and carrying a coil (12) having at least one winding per phase. A plurality of pairs of lateral branches are mounted in a slot of the body (14). A plurality of connecting heads (50 to 55) extend outside the body (14) so as to form a first lead-out (42) and interconnect each pair of lateral branches. A plurality of coupling feet (150 to 155) are offset circumferentially with respect to the plurality of connecting heads and extend outside the body (14) so as to form a second lead-out (43) and interconnect each pair of lateral branches. One of the pluralities has a generally pointed shape and has an axial length of between 15 and 20 mm. The stator is used with an alternator or alternator-stator for a motor vehicle. An internally ventilated electrical machine is equipped with the stator.

Abstract: The rotor comprises of a plurality of alternating north poles (N) and south poles (S) formed from a plurality of permanent magnets (3) having a radial polygonal section and arranged in first recesses (4). These first recesses extend axially and are distributed regularly between a circumferential portion (5) and a central portion (6) of the magnetic mass (2) of the rotor in such a way as to define a plurality of circumferential polar sections (10). The radial section comprises a substantially rectangular portion (8) next to the circumferential portion adjacent to a substantially trapezoidal portion (7) next to the central portion. The rotor has a ratio (R) between a first height (h) of the trapezoidal portion and a second height (H) of the rectangular portion, in a radial direction, is predetermined in such a way as to maximize the efficiency of the electric machine.

Abstract: The method according to the invention involves limiting the charging of a vehicle alternator by only authorizing progressive augmentation of a current duty cycle (DC) of an excitation signal (7) of the alternator from an initial duty cycle to an expected duty cycle (EpsU) calculated by a control loop (1, 5, 6) of the alternator. According to the invention, a complementary limitation of the charging of the alternator involves limiting the increase of the current duty cycle (DC) according to at least one parameter of the heat engine involving an angular acceleration (mot) and/or a rotation speed (Nmot) of the heat motor. In particular, this complementary limitation can additionally involve limiting the increase of the current duty cycle (DC) according to a negative value of the angular acceleration (mot).

Abstract: Mobile assembly (500) for meshing with a toothed starter ring gear (C) of a heat engine comprises: a drive unit (1) provided with a pinion (11); a starter drive element (118); a pivoting control lever (20) including a lower forked end having two arms; and a friction clutch (300), pinion being rotationally fixed with a casing partially housing the drive element (118) and comprising the reaction plate (112) of the clutch. The lever (20) is associated with means for closing the clutch and is configured to move the casing axially, while the closure means are configured to move the drive element axially in order to tighten the friction clutch. The heat engine starter comprises such a mobile assembly.

Abstract: A rotating electric machine including at least a first terminal and a second terminal, and an electric circuit connected to said two terminals, the electric circuit including a field winding. The rotating electric machine also includes a thermal protection device (7) arranged in the electric machine. The thermal protection device (7) includes a first electric conductor (71) electrically connected to the second terminal, and a heat-sensitive member (8) arranged so as to deform above a predetermined temperature, wherein, above a predetermined temperature, the deformation of the heat-sensitive member (8) actuates a connection means (72) of the thermal protection device in order to electrically connect the first conductor to a second conductor of the electric circuit having a different electric potential than that of the second terminal.

Abstract: An alternator includes a stator S, a rotor R and a transistor bridge, which form synchronous rectification. The synchronous rectification is in the form of an over-molded mechatronic housing (2), and the mechatronic housing includes an electronic power substrate (3) and power connection terminals (23), (24). Electronic chips (300A, 300B) are implanted on the electronic power substrate, and at least one of the power connection terminals is connected electrically to the electronic chip by means of at least a first soldered connection wire (300, 301, 302, 30B+, 30B?). According to one embodiment, the electronic power substrate is of the IMS, DBC or PCB type.

Abstract: A hybrid drive of a compressor (3) for an air conditioning unit in an automotive vehicle with a thermal engine, which is implemented by a coupling assembly including a rotating electric machine (2) adapted to be mechanically coupled to the thermal engine and to the compressor. First disengageable coupling assembly (6) are provided for connecting the rotating electric machine to the thermal engine, and second coupling assembly (8) are provided for coupling the rotating electric machine to the compressor.

Abstract: A method is implemented in a vehicle having an electronic control unit (15), vehicle sensors, a data communication bus (16), and an on-board electrical network. The micro-hybrid system (1) comprises at least one rotary electrical machine (2) which is provided with a device (8) for detection of rotation, power circuits (14) comprising an inverter (7) and an excitation circuit (4) which supplies the rotary electrical machine (2), and a rectifier (11) which is supplied by the said rotary electrical machine (2), energy conversion circuits (12) which are connected to an energy storage device (9) which is supplied by the rectifier (11), a first circuit (13) to control the power circuits (14), and a second circuit (25) to control the energy conversion circuits (12). The method generates control signals (Dd. Exc., Dd. Ond., Auth. Exc., Auth. Ond.) on the basis of first information signals (Capt. Véh.

Abstract: A device for rectifying the current of a rotary electric machine comprising a bearing (50) with through openings (51) for a coolant, that comprises at least one module (100) including a holder (10, 16) for holding current rectifying members (93, 94) having the same phase as the machine, said holder (10, 16) including a heat sink (16) with vanes (18) at least partially covering an opening (51) in the bearing (50). A rotary electric machine including such a current rectifying device. Application: alternators of automotive vehicles with internal ventilation.

Abstract: A contactor including a plunger core (100), a pull-in winding (La), a holding winding (Lm), a moving contact plate (CM) and three contacts (PC+, PC1, PC2). The contactor has three operating states: a first state with no electrical contact between the contacts, a second state with electrical contact between first and second contacts and a third state with electrical contact between the first, second and third contact. The contactor also includes an electrically controllable micro-actuator (MS) to allow or prohibit, depending on the electric current which is applied thereto, commutation between the second and third operating states, the commutation being prohibited by the micro-actuator due to a force counteracting a thrust of the moving contact plate when the micro-actuator is electrically excited. Preferably, the micro-actuator is a micro-solenoid.

Abstract: A rotor (24) for a rotary electric machine (20), mainly for the automotive industry, has a front polar wheel (46N) and a rear polar wheel (46S). Each polar wheel (46N, 46S) includes claws (52) extending axially towards the other polar wheel (46N, 46S). Each claw (52) of the polar wheel (46N, 46S) is circumferentially interleaved between two claws (52) of the other polar wheel (46N, 46S). At least two interpolar gaps (62) are provided between the side faces (60) opposite two consecutive claws (52), and at least two members (68) defining a magnetic barrier are provided in two interpolar gaps (62) associated on either side of a predetermined claw (52D). The front longitudinal ends (72) of the two members (68) are connected by a connector (82) in order to define an open chain (80).

Abstract: A starter including a double contact electromagnetic contactor (10) having an electrically controllable micro-actuator of the micro-solenoid type and an associated electronic control device (ECC). The electronic control device includes a first transistor commutation (T1, T2, CZ2, RC1, RC3, SL) to control the excitation of a pull-in winding (La) of the contactor and a second transistor commutation (T3, CZ2, RC2) to control the excitation of the micro-actuator. The second transistor commutation controls the excitation of the micro-actuator (MS) for a predetermined duration after activation of the electronic control device.

Abstract: A method of inserting an undulating winding into an alternator stator. The method comprises the following steps consisting of shaping each phase winding into a succession of crenels comprising two lateral branches which are intended to be attached at a position for reception in a slot, positioning the windings on an insertion tool and inserting the turns into the slots of the stator in the reverse order to the winding order. The windings are wound around the insertion tool simultaneously, and the turns that succeed one another in a determined winding order belong alternatively to different windings.

Abstract: A method wherein the signals (SW1, Sw2, Sw3) controlling the power supply (10) of the phase windings (4) of the motor consist of signals (So1, So2, So3) that are out-of-phase by a phase angle (f) which is continuously variable in relation to synchronization signals (Si1, Si2, Si3) generated by sensors (1) detecting the position of the rotor. According to the method, a processing unit (5) comprises inlets (8) for receiving the synchronization signals and outlets (6, 7) for transmitting the out-of-phase signals. The synchronization signals are binary signals presenting synchronization fronts and the rising and falling fronts of the out-of-phase signals are generated, following a level switching time depending at least on the phase angle, from at least one reference front selected from the synchronization fronts such that the switching time is minimum.

Abstract: The claw-pole-rotor shaft has a front end with a radially larger-sized section, two knurled regions known as crimping regions, intended to be assembled with the claw-pole rotor by local deformation of the material of the claw-pole rotor, and a centring region for centring the claw-pole rotor, the crimping regions being positioned on each side of the centring region while the centring region projects radially with respect to the crimping regions of the shaft, these themselves projecting radially with respect to the section of larger radial size at the front end of the shaft. The claw-pole rotor is characterized in that it is equipped with such a shaft while the rotary electrical machine is characterized in that it is equipped with such a rotor.

Abstract: A method for producing a claw-pole rotor, including: a step of mounting polar wheels on the shaft in such a way that each tooth of a polar wheel is located in the existing space between two consecutive teeth of the other polar wheel; a step of machining the lateral faces facing two adjacent teeth, whereby an axial groove is machined in each lateral face; and a step of mounting a magnetic element between two adjacent teeth such that the magnetic element is received in the axial grooves. The method is characterized in that the step of machining lateral faces is carried out before the step of mounting polar wheels on the shaft. The invention also relates to a rotor obtained by such a method.

Abstract: A method for controlling a reversible polyphase rotating electrical machine, wherein at least one coil circuit is supplied through a bridge of switches, including the following steps: controlling (P1) the bridge to deliver to the coil circuit a periodic voltage with a phase shift (d) relative to an electromotive force induced in the coil circuit, such that an operating torque is generated, the phase shift having initially a first value (d0); controlling (P2) the bridge to deliver to the coil circuit a periodic voltage with the phase shift (d) producing a torque ranging between the operating torque and the opposite of the operating torque, the phase shift taking on a plurality of values upon the control; flipping (T2) the bridge in rectifying mode.

Abstract: A control and power module for a rotating electrical machine comprising a power circuit containing a number of branches, and a control circuit designed for controlling the power circuit when the machine operates in a nominal mode. The inventive module is characterized in that the control circuit is also designed for monitoring an output voltage from the power circuit and blocking at least one branch of the power circuit in a conduction state when the output voltage reaches an at least first threshold value so that the machine functions in a degraded mode. The invention is for use in an alternator starter.

Abstract: The invention relates to a protective cover which is intended to be mounted on the rear bearing (14) of a polyphased rotating electrical machine, such as an alternator or an alternator-starter for a motor vehicle. The inventive cover is of the type that consists of: an outer frame comprising a rear bearing and supporting a polyphased wound stator, the phase outputs thereof being connected to a phase connector (102); and a support which is made from an electrically-insulating material, which is mounted in a fixed manner to the rear bearing and which supports the phase connector (102). The cover is designed both to support the phase connector and to cover the rear bearing. The invention also relates to an alternator and an alternator-starter comprising one such cover. The invention is suitable for alternators and alternator-starters for motor vehicles.