Abstract: A method for controlling an alternator or alternator-starter of a motor vehicle, the electric machine being capable of providing an electric current, the strength of which varies on the basis of the excitation signal (EXC). A duty cycle is associated with each excitation signal. The method includes comparing the difference between the duty cycle values of two consecutive excitation signals at a predetermined threshold. If the difference is greater than the predetermined threshold, a gradual response phase is released, during which the duty cycle of the excitation signals is gradually increased, particularly in a substantially linear manner. At the start of the gradual response phase, the duty cycle of the consecutive excitation signals is increased by a predetermined jump (D,B), then the duty cycle is gradually increased. The duty cycle jump at the start of the gradual response phase being less than or equal to the release threshold of the gradual response phase.

Abstract: A method of manufacturing a rotor for rotating electrical machines, notably an alternator, the rotor including two magnet wheels defining between them at least one interpole space arranged to receive at least one magnet. At least one angular indexing mark is produced on at least one of the magnet wheels. At least one groove partially delimiting the interpole space is formed, by machining, on the magnet wheel while maintaining the magnet wheel in an angular position dependent on the angular indexing mark.

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: A rotating electric machine comprising a rotor (2) comprising a body (34) on the periphery of which are installed conductors (36) forming the winding, and a stator (3) positioned around the rotor (2) comprising a magnetized structure extending along a circumference of the stator (3). The body (34) of the rotor (2) is made partially of plastic, in the region of the teeth which conventionally separate the notches near the air gap, on the periphery of the armature. A modified structure of magnets of Halbach type is made with magnets of NdFeB type to reduce the thickness of the stator (3), to increase the radius (R2) of the rotor (2) so as to position all the conductors (36) on the periphery of the body (34) of the rotor (2) on one and the same layer at a diameter of maximum value.

Abstract: A method performed in a power bridge (3) comprising multiple arms (B1, B2, Bi, Bn). Each arm comprises upper and lower semiconductor switches arranged in series and connected in parallel to first and second terminals (B+, B?) of a common voltage source (2). The mid-point of the arm is connected to a phase of an electrical load (1). The aforementioned switches are controlled complementarily by pulses having a duty factor set value (RC1, RC2, RCi, RCn) determined as a function of a first phase voltage set value (V1, V2, Vi, Vn) in relation to a reference terminal of the electrical load (1) and of a common-mode voltage (V0) in relation to one of the first or second terminals, such as to control the switching losses of the switches. The common-mode voltage (V0) is determined such as to balance switching losses and conduction losses between the switches.

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: The present invention relates to an electronic assembly (10) for a rotary electric machine (1) for a motor vehicle. Said electronic assembly is characterised by comprising: blocks (100, 200, 300) of electronic components, the blocks having different heat dissipation needs, the blocks being: a power block (100), a filter block (200), a control block (300), and a device (10?) for cooling said blocks (100, 200, 300); said cooling device (10?) comprising: a protective cover (400) suitable for covering the power, filter and control blocks (100, 200, 300), said protective cover comprising openings (401, 402, 403, 404) suitable for generating cooling air flows which differ according to the heat dissipation needs of each of the power (100), control (200) and filter (300) blocks; and cooling elements (101, 201) coupled with said protective cover (400).

Abstract: An electrical machine such as an alternator or starter-alternator for a motor vehicle which is fitted with the one-piece voltage-regulator/brush-holder assembly (1). The brush-holder (6) is capable of guiding at least first and second brushes by means of respective first and second longitudinal recesses (7). The recesses are substantially parallelepiped, made of an electrically insulating material and extend substantially in an axial plane of a rotor of the machine. Each recess is provided with at least one respective longitudinal internal groove (9) in communication with at least one channel (11) provided in a body (6) of the assembly (1), in an axial direction (XX?) of the rotor, and intended for a coolant (8) to pass therethrough. A first cross section of the first internal groove is between 5% and 7% of a second cross section of the recesses.

Abstract: The method of controlling a polyphase rotating electric machine, the machine operating as a generator and being linked to an electrical network (1), is of the type of those consisting in short-circuiting at least one phase winding in the event of load shedding. A short-circuit command (SAND) is generated for the phase winding when a first measurement voltage V of a voltage B+ of the network exceeds a first predetermined threshold value V1 and when a phase current (I?) in the phase winding vanishes and changes direction. The first measurement voltage V may be obtained by filtering the voltage B+ of the network with a predetermined time constant TF.

Abstract: A rotary electrical machine comprises a rotor including a plurality of poles and a plurality of windings (E0-E7) wound about the poles, a stator, and a compensation device configured to compensate the armature magnetic reaction of the stator. The compensation device comprises at least one permanent compensation magnet which is implanted in a pole(s) of the rotor. The magnet(s) is/are sized and placed in accord with the desired compensation effect desired.

Abstract: A machine having a wound rotor (102) comprising a manifold (112) that includes a set of blades (131) and longitudinal notches (133). Rotor (102) also comprises a winding (108) formed of a set of conductors (134) that each comprise two arms (135.1, 135.2), connected together by a base (136). The curve, representing the electromotive force (EMF) generated by the rotor (102) on the basis of the angle of rotation of the rotor, is linear and steep in a switching region, and the notches (133) are angularly shifted relative to the blades (131) so that each notch (133) is located opposite a junction between two blades. The machine may relate to a starter fitted with the machine.

Abstract: The device according to the invention controls a polyphase inverter (10, 14, 17) intended for powering from a DC current source (CC) a polyphase rotating electric machine (1). The device is of the type of those generating commutation functions driving commutation elements (9, 13) of the inverter in such a way as to obtain a reduction of the losses in the commutation elements and a decrease of an effective current in a decoupling capacitor (16) of the source (CC). According to the invention, this reduction and this decrease are obtained by means of a set of control strategies (21, 24) determining the commutation functions by using additional degrees of freedom of the polyphase machine (1) with respect to a three-phase reference machine. The polyphase machine comprises first and second phase windings forming a first three-phase system (2, 3, 4) and a second three-phase system (5, 6, 7) with distinct neutral points (11, 15) offset angularly by a predetermined angle of offset (?).

Abstract: A synchronous rectification alternator for a motor vehicle is disclosed. The alternator includes a stator, a rotor, and a synchronous rectification system for rectifying into a DC voltage the alternating voltages supplied by the stator, and a voltage regulator for regulating the DC voltage. The alternator also includes fault detection for detecting faults in the synchronous rectification and supplying fault detection information to the voltage regulator. In one version, the fault information is supplied to the voltage regulator at fault inputs also receiving phase signals representing the alternating voltages supplied by the stator. At least one of the items of fault information is used to cause, in the voltage regulator, opening of an excitation circuit supplying current to an excitation coil of the rotor so as to produce, in the voltage regulator, a fault indication.

Abstract: Assembly (57) for a speed reducer of a rotary electric machine, comprising: a ring gear (46) secured to a transverse wall (58); a base plate (60) to be securely and rotatably mounted relative to a mounting (16) of the machine; an axially acting resilient means, such as an axially acting resilient disc (64); and an added hub (68) on which the transverse wall (58) of the ring gear (46), the base plate (60), and the resilient means (64) are mounted. The hub (68) has at least one first shoulder (71) for supporting the axially acting resilient means (64), and at least one second shoulder (72) for supporting the transverse wall (58) of the ring gear (46). The assembly also relates to a starter, particularly for a motor vehicle.

Abstract: The front bearing (110) of a heat engine starter having an output pinion starter drive (120) comprises, in the front, a transverse wall (111) having an opening (112), for passing a body (122) of the starter drive (120) there through, and a cavity (200) for mounting a sealing joint (240). The cavity is set up on the inner periphery of the rear surface (400) of the front bearing. The rear surface is configured so as to form a bearing abutment for the outer ring (231) of a rolling bearing (230) and moreover has at least one hollowed-out area (300) intended to be filled with grease so as to form a grease supply. The hollowed-out area is mostly set up outside the cavity. A heat engine starter having an output pinion is characterized in that it comprises one such front bearing.

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: The power electronic module includes electronic components arranged in a casing and external connection elements having at least one power line suitable for being linked electrically to a power conductor of a power circuit of a rotating electrical machine. The casing and at least one element of a device for measuring an intensity of a current circulating in the power line form a single-piece assembly. According to particular features, the abovementioned element of the measurement device is a magnetic circuit. The magnetic circuit consists of ferrite and surrounds the power conductor.

Abstract: The device (100) for assembling capacitors (200) is intended for an electronic converter with a plurality of arms provided with transistors. The device comprises a bus bar (11) with positive polarity and a bus bar (12) with negative polarity. The bus bar with positive polarity and the bus bar with negative polarity are superposed one on top of the other without electrical contact. Preferably, the bus bar with positive polarity comprises a width (L1) smaller than the width (L2) of the bus bar with negative polarity. The device further comprises a support part (13) for insulating and indexing, arranged between the bus bar with positive polarity and the bus bar with negative polarity. The support part for insulating and indexing is typically formed from PBT plastic material reinforced with fiberglass.

Abstract: A DC electric rotating machine, such as a starter of an automotive vehicle, includes a stator with salient poles having at least four poles distributed uniformly over the circumference of the stator, a rotor disposed inside the stator, a set of brushes adapted for the electric supply of the rotor, and at least two geometrically opposed salient poles. Each pole includes at least one substantially radial slot in a plane parallel to the axis of rotation of the rotor and preferably passes through the axis of the rotor. By minimizing the reaction fields of the armature, utilization of the magnetic material of the parts of the stator is balanced and a harmful armature reaction effect, which increases saturation of the polar parts of the inductor and which leads to reduction in the driving magnetic torque, is mitigated.

Abstract: A method for controlling a motor vehicle alternator, in which an error value, resulting from the comparison between the voltage produced by the alternator and a set value, is processed in a filtering means by applying a transfer function, which determines a gain to be associated with the error value on the basis of the rotational frequency of the alternator, in order to control the adjustment of the field current allowed by the alternator. The transfer function of the filtering means is modified on the basis of the rotational speed of the alternator by attenuating the gain over a given frequency range when the rotational speed decreases.