Abstract: A rotary electrical machine comprising a front magnet wheel, a rear magnet wheel, and a shaft comprising four sections with respective diameters (D1, D2, D3, D4), distributed axially, wherein: the first section comprises knurling which is configured such as to ensure radial retention between the shaft and the front magnet wheel; the second section is configured to permit the indexing and centring of the front and rear magnet wheels; the third section comprises knurling which is configured to ensure radial retention between the shaft and the rear magnet wheel; and the fourth section comprises a collar which is configured to ensure the axial retention between the shaft and at least one magnet wheel, and in that the diameters (D1, D2, D3, D4) of the shaft comply with the following equation: D1<D2<D3<D4.

Abstract: The invention relates to an architecture which is applied to a six-phase rotary electric machine of the type comprising first and second three-phase systems offset angularly at a predetermined offset angle. First and second phase windings of the three-phase systems respectively carry first (U1, V1, W1) and second (U2, V2, W2) phase currents controlled by electronic power modules (15, 16, 17). The electronic modules comprise first and second power terminals (12, 13) each capable of being electrically connected to first and second instances of the first and second phase windings. According to the invention, the electronic power modules are interconnected such as to balance the losses.

Abstract: Brush holder support plate (1) for an electric engine comprises a central through-hole (2) for the engine manifold and guide elements (10) for receiving brush holders (20) in sliding connection on the plate. The plate allows the brush holder to be mounted on the plate, engaging same in the direction running from the edge (1e) of the plate towards the central through-hole (2). The plate comprises a non-return stop (11) for each brush holder (20) after the latter has been mounted in sliding connection on the plate, the stop being elastically retractable. The brush holders (20) have a base shaped so as to be received in sliding connection in the guide elements (10) of the plate (1). They have a recess in the base of same suitable for being engaged by the corresponding non-return stop (11) of the plate (1).

Abstract: The method of control according to the invention slaves a DC voltage generated by the alternator to a predetermined setpoint value by controlling an excitation current flowing in an excitation circuit comprising an excitation winding of a rotor of the alternator. The excitation current is controlled by means of a semiconductor switch, in turn controlled by a control signal having a predetermined period. The method comprises a detection of a failure of the excitation circuit. At least one short-circuit of the excitation winding is detected. According to another characteristic of the method, the control signal is generated on the basis of a combination of a setpoint signal formed by pulses of the predetermined period exhibiting a duty ratio representative of the setpoint value and of a detection signal indicative of the short-circuit.

Abstract: An interconnection element (24) for connecting the stator coils of a polyphase rotary electric machine (2), including a plurality of conductive layers stacked axially, including the same number of solid base layers (26, 28, 30), and additional layers (32, 34, 36), each formed by a plurality of ring portions, each one of the ring portions not covering the entire perimeter of the stator, each one of the conductive layers having internal connection tabs (40) for connecting the coils and external connection tabs (48, 50) for connecting to connected electrical devices (4, 20), the number of base layers and additional layers being equal to the number of phases of the machine to which the interconnection element is added.

Abstract: The invention relates mainly to a motor vehicle combustion engine starter motor comprising:—a pinion body comprising splines on its external periphery,—a pinion (31) having an axis (Y), the said pinion (31) being mounted with the ability to move on the pinion body comprising an internal periphery comprising splines (44) engaged with the splines of the said pinion body, the said pinion (31) comprising, on its external periphery,—teeth (42) each having two tooth flanks (47) each comprising:—a working flank (48), and—a tooth root (49) extending from the said working flank (48) of the corresponding tooth (42), characterized in that the said tooth flank (47) comprises at least one tooth root (49) delimited by a curved portion (PC) having a variable radius of curvature.

Abstract: The pole wheel according to the invention is intended for the rotor of a Lundell rotating electric machine. The pole wheel is obtained entirely by forging and comprises a central core provided with a central bore in a central axis of the pole wheel intended to receive a shaft of the rotor, a plurality of pole teeth (10g, 11g) distributed in a regular manner at the circumference of the pole wheel and extending substantially parallel to the central axis of the pole wheel, and an annular part forming a plate and extending between the central core and parts forming bases of the pole teeth. According to the invention, the pole wheel comprises a plurality of reservoirs (105) provided in the parts forming bases of the pole teeth.

Abstract: The invention relates mainly to an assembly comprising:—a combustion engine ring gear having a plurality of teeth, the said ring gear being defined by a modulus and a pressure angle,—a starter comprising a pinion (31) able to engage with the said ring gear of the said combustion engine, the said pinion (31) having a plurality of teeth (42) is defined by a modulus (Mp) and a pressure angle (alpha_p), characterized in that a pinion product which is the product of the modulus (Mp) of the said pinion (31) and the cosine of the pressure angle (alpha_p) of the said pinion (31) is greater than a ring-gear product equal to the product of the modulus of the said ring gear and the cosine of the pressure angle of the said ring gear.

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.

Abstract: A rotating electrical machine for a motor vehicle comprising a rotor (2) supplied with an excitation current (ie), a stator (3) comprising a polyphase winding and coupled to the rotor (2), a thermal protection module (4) suitable for evaluating at least one temperature (T1, T2, T3) in the machine and for comparing the temperature with an associated thermal protection threshold (Th), a control device (5) supplying the excitation current (ie) depending on an operation mode command (RQ) and the temperature comparison, so as to operate the rotating electrical machine (1) according to a mode of operation chosen from a nominal generator mode in which the machine is configured to deliver a first maximum power or at least one extended generator mode in which the machine is configured to deliver a second maximum power greater than said first maximum power.

Abstract: The electrical supply system according to the invention is of the type comprising, on the one hand, an electrical power network having a first voltage electrically connecting first items of equipment comprising an electrical motor/generator, an inverter/rectifier and a first electrical energy store, and, on the other hand, an electrical service network having a second voltage that is less than the first voltage electrically connecting second items of equipment comprising a second electrical energy store, an electronic control unit controlling the energy transfers between the power network and the service network by means of at least one reversible DC/DC converter The electronic unit comprises a first electronic module supplied by the power network exchanging information with the first items of equipment, and a second electronic module supplied by the service network exchanging information with the second items of equipment and electrically insulated from the first module.

Abstract: The fitting of a stator (13) body (14) equipped with a winding (12) in an inner support surface (250) for a skirt (155) of a bearing (15) of a rotary electrical machine, such as an alternator or an alternator-starter of a motor vehicle, characterized in that the skirt (155) is heated locally by induction before fitting of the body (14) equipped with its winding (12) in the skirt (155). The invention also relates to a rotary electrical machine comprising a fitting of this type.

Abstract: Pulley assembly (111) comprising a hollow shaft (112) with an axis X, the hollow shaft (112) being suitable for being mounted on a shaft of a rotating electrical machine, the hollow shaft comprising at least one thread or tapping (132, 133) and a collar (113) extending radially outwards, wherein said hollow shaft also includes: a nut (128, 129) screwed on the hollow shaft via the thread or tapping; a spring (126) mounted about a portion of the nut; at least one ball bearing (122, 123) tightly fitted to the hollow shaft; a pulley (130), tightly fitted to said at least one bearing, about the spring, the nut and the hollow shaft. The nut (128, 129) includes a radial shoulder (131) mounted between the spring (126, 127) and the ball bearing (122, 123), the spring being held axially between the collar (113) and the radial shoulder (131).

Abstract: The polyphase rotary electric machine wherein the invention is implemented comprises phase short-circuit means (15, 18) included in a control system (10). The machine is fitted in a motor vehicle, operates as a generator and is connected to an on-board electric network (2). The phase short-circuit means short-circuit at least one phase winding when a DC voltage measurement (B+) of the network, regulated by a regulator device, exceeds a predetermined threshold value and a phase current 15 in the phase winding is cancelled out and changes direction. According to the invention, the control system limits an overvoltage on the network due to an event other than load shedding.

Abstract: The present invention refers to a cover (17) of a contactor (1) of a starter for motor vehicle, comprising —a plastic portion (18) delimiting a contact chamber (15) volume, —two plugs (43, 45) in an electrical conductor material which cross the plastic portion, each of the two plugs (43, 45) having an end in the contact chamber (15), —a seal (37) which is arranged on the plastic portion (18) to isolate the contact chamber (15) when the cover (17) is assembled with a coil casing (5) of the contactor (1), the seal (37) being assembled in a fixed manner to the cover (17).

Abstract: A regulator has a circuit generating an activation command by bringing, to a first voltage higher than a high reference voltage, a bidirectional line connected to a detection circuit for detecting a status of the activation command. The detection circuit comprises generation means for generating a fault signal from a flag indicating a failure of the alternator, linking the line to a ground by means of a switching element, thus bringing the line to a second voltage lower than a fault voltage lower than the high reference voltage, and the control circuit comprises detection means for detecting the fault signal. The control circuit further transmits a setpoint PWM signal having a maximum higher than the high reference voltage and a minimum lower than a low reference voltage higher than the fault voltage, a duty ratio of the setpoint signal being representative of a setpoint voltage (V0) of the regulator.

Abstract: Rotor an alternator or alternator-starter type comprises two pole wheels including a series of axial claws having a generally trapezoidal shape that extend axially from the edge of the outer radial end of one pole wheel towards the other pole wheel. The rotor comprises an interpolar magnetic assembly in the interpolar space between a first claw of a first pole wheel and a second claw of a second pole wheel. The magnetic assembly comprises two first faces defined by first and second free ends. A side face is also provided, such that the adjacent side face faces same, the side face comprising third and fourth opposing ends between which the magnet is in contact. The side faces of the first and second claws define a reduction in cross-section from one of the free ends of the magnetic assembly extending towards a claw head end along a side facet.

Abstract: A regulating loop for a digital regulator of an excitation rotating electric machine for operation as a generator delivering an output voltage tailored by an excitation current. The digital regulator comprises a control device for controlling the excitation current and the regulating loop comprises, at input, a measuring device for measurement by sampling the output voltage generating a measurement signal (Um), an calculation device generating an error signal (e) equal to a difference between the measurement signal (Um) and a setpoint (U0), a processing system for processing of the error signal (e) generating a regulating signal (Ysat) comprising in parallel a first amplifier, an integrator and an anti-saturation system, and comprising, at output, a generation system for generation of a control signal (PWM) controlling the control device as a function of the regulating signal (Ysat). The anti-saturation system is a conditional detection system.

Abstract: The invention mainly concerns a coiling procedure of a stator for a multiphase electrical rotating machine: the said stator comprising grooves, each intended to take up an uneven number of conductors of a coil, the said coil comprising two systems, each comprising one group of conductors (C1-C3, C1?-C3?) respectively, the said procedure comprises stages of installation of the conductors (C1-C3, C1-C3?) into the said grooves, repeated in order to form a coil comprising several turns (S1-S9) completed alternately according to a first direction of rotation (K1) and according to a second direction of rotation (K2) is opposite the first direction of rotation, with the characteristic that at least two changes of direction of rotation (CH1-CH8) from one turn to the other are carried out in different angular zones.

Abstract: The method according to the invention calls upon a rotary electric machine (1) comprising a drive member (3) and a transmission member (4) of the belt or chain type, collaborating with the drive member and with the combustion engine (2) in order to start or restart the combustion engine, a tensioner (6) being provided to press against one strand (7) of the transmission member that extends between the rotary electric machine and the combustion engine. According to the invention, in a first stage, the rotary electric machine (1) supplies a predetermined reduced torque in the direction of starting for a predetermined duration in order to tension the transmission member (4) and then, in a second stage, the rotary electric machine (1) supplies a predetermined optimum torque for rapidly turning over the combustion engine (2) and causing it to start.