EP3718197A1

EP3718197A1 - Electrical phase connector for rotary electric machine stator

Info

Publication number: EP3718197A1
Application number: EP18807092.4A
Authority: EP
Inventors: Stéphane DE CLERCQ; Vincent Ramet; Julien PAUWELS
Original assignee: Valeo Equipements Electriques Moteur SAS
Current assignee: Valeo Equipements Electriques Moteur SAS
Priority date: 2017-11-29
Filing date: 2018-11-28
Publication date: 2020-10-07
Also published as: FR3074376B1; KR20200096511A; CN111386649A; US11374457B2; FR3074376A1; JP2021505117A; CN111386649B; WO2019105975A1; US20210376682A1

Abstract

The invention relates to a rotary electric machine for a vehicle comprising an electronic assembly, a stator and an electrical phase connector (10) for a rotary electric machine stator (20). The electrical phase connector (10) comprises a predefined angular configuration of electrical coupling means (130b) so as to carry, respectively, a different electrical phase toward or away from a rotary electric machine stator (20). Each electrical coupling means (130b) is electrically connected to a conductive phase track (110).

Description

"Electrical phase connector for rotating electric machine stator"

Technical area

The present invention relates to the standardization of the stators of electric machine, and in particular their electrical control. In particular, the invention particularly relates to an electrical phase connector for a rotating electrical machine stator, and a stator comprising such an electrical phase connector.

State of the art

A rotating electrical machine is an electromechanical device, preferably polyphase, and for converting electrical energy into mechanical energy, or vice versa. A known application of rotating electrical machines in the automotive field is the alternator: a device for using the mechanical energy of the engine to recharge the vehicle battery. Another known application of rotating electrical machines in the automotive field is the alternator-starter: a device for automatically stopping and restarting a motor vehicle engine that reduces fuel consumption and pollution. for example during a short stop at a red light.

Thus, the rotating electrical machine can be used as a generator or as a motor to produce the mechanical energy from the electrical energy and to rotate the engine.

In known manner, the rotating electrical machine comprises a rotor rotatably mounted inside a stator comprising a cylindrical stator body and a multi-phase electrical coil, each of the electrical phases being formed by a plurality of electrical conductors wound axially around of the stator body. The winding is electrically connected to an electronic assembly, and in particular to a power module, at a free end of some of the electrical conductors forming the phase input / phase outputs of the winding.

Depending on the type of rotating electrical machine, the shape and / or technical characteristics of the stator may vary. By way of non-limiting example, depending on the number of electrical phases of the rotary electrical machine and its use, the number, the The geometry and angular orientation of the phase inputs / outputs for connecting the stator to the electronics assembly may vary from one rotating electrical machine to another.

This great variability of rotating electrical machines leads to design and produce a large number of stators all different, because of the need to provide an electrical connection interface adapted to each configuration and / or uses. As a result, production costs increase.

An object of the present invention is to provide a new electrical phase connector for a stator of an electric machine in order to at least largely meet the above problems and to furthermore lead to other advantages.

In particular, an object of the present invention is to make it possible to standardize the manufacture of the stator bodies and their coils.

Another object of the present invention is to simplify the production processes of the stators of a given family of rotating electrical machine, facilitating the realization of various electrical couplings.

Presentation of the invention

According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a rotating electrical machine for a vehicle, said machine comprising an electronic assembly for driving said machine, a stator comprising a stator body having a plurality of notches formed between its two axial ends and a coil mounted in the stator body via said notches, the coil comprising a plurality of conductor portions forming phase inputs / outputs, and an electrical phase connector for electrically interfacing the winding with the electronic assembly; the connector comprising a plurality of phase-conductive tracks electrically insulated from each other, each conductive track being connected on the one hand to an element of the electronic assembly and on the other hand to a phase input / output for transporting a phase electric from or to the stator.

Thus, the electrical phase connector according to the first aspect of the invention makes it possible to interface an electric machine stator with the electrical circuit of the electronic assembly with which it collaborates. The electrical connector allows you to connect each electrical phases of the electric machine to the electrical circuit that drives its operation. Thus, when the electric machine is used as a motor to convert electrical energy into mechanical energy, then the electrical phase connector is used to power the electrical phases of the stator to generate a rotating magnetic field that rotates the rotor. Moreover, when the electric machine is used as an alternator to convert mechanical energy into electrical energy, then the electrical phase connector can recover electrical currents generated at the stator and induced by the rotation of the rotor.

Thus, the electrical phase connector according to the first aspect of the invention makes it possible to standardize the design and production of the stator with standard electrical connections and according to an implementation on the stator common to all the models: only the geometry and / or the configuration of the electrical phase connector according to the first aspect of the invention is adapted according to the electrical circuit with which it collaborates and / or the integration of said stator in its environment, for example in a motor vehicle.

This advantageous configuration also reduces manufacturing costs and simplifies the production of such an electrical phase connector and / or electrical machine.

The connection between the electrical winding and the phase connector is preferably made via electrical coupling means which are integral with the phase-conducting tracks in order to transfer an electrical power signal to or from the stator, and more particularly to one of them. electrical phases of the stator in order to control the electrical machine or to recover the power signals induced by the rotation of the rotor of the electric machine, as previously described. By solidarity, it is understood that the electrical coupling means are mechanically linked to the corresponding conductive tracks, and preferably they are also electrically coupled to said corresponding tracks. Of course, in the context of the interfacing of a polyphase electrical machine, each conducting track - and each corresponding electrical coupling means - is isolated from the other conductive tracks in order to be able to transfer different electrical potentials.

The electrical phase connector according to the first aspect of the invention is also configured to be electrically connected to the electrical circuit of the electronic assembly by a second side, so that the conductive tracks are respectively electrically connected to a power circuit. the electronic set. Means Specific electrical connection of the electrical phase connector to the power circuit will be described more particularly later in some embodiments of the invention.

The electrical phase connector according to the first aspect of the invention may comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

each conducting track extends in a circular contour around a central axis.

According to one embodiment, the circular contour along which each conductive track extends is of the type of an angular segment of a circle, said circular contour being open;

at least a part of the phase conducting tracks comprises an electrical connection part. Preferably, each electrical phase conducting track according to the first aspect of the invention comprises an electrical connection part. This configuration makes it easier to interface the electrical phase connector and / or the electric machine stator with the electrical circuit;

- Advantageously, and according to a first embodiment, the at least one electrical connection portion is a connection terminal which takes the form of a female lug to facilitate the screwing and / or welding and / or the crimping an element of the electronic assembly with the electrical phase connector. According to a second variant embodiment, the at least one electrical connection terminal takes the form of a male terminal;

according to a first embodiment compatible with any of the alternative embodiments of the electrical connection parts, the at least one electrical connection portion protrudes from the body of the conductive track and in a direction substantially axial;

- To facilitate the interfacing of the electrical machine with the electrical circuit, each at least one electrical connection portion is located along an outer peripheral contour with respect to the central axis;

each conducting track takes the form of an angular segment. This configuration makes it possible in particular to facilitate the electrical insulation between each conductive track. Each angular segment extends around the central axis. Preferably, all the conductive tracks extend at the same radial distance with respect to the central axis;

each phase conducting track comprises: an angular segment-shaped conductive track body, at a first end of said angular segment, an electrical connection portion extending in a substantially axial direction for connection with the electronic assembly, and , at a second end of said angular segment, electrical coupling means cooperating with complementary coupling means of the winding. This configuration makes it possible to facilitate electrical interfacing with, on the one hand, the stator with which the electrical phase connector is intended to collaborate - via the means of electrical coupling - and, on the other hand, with the electrical circuit. via the electrical connection terminals;

- The electrical coupling means are configured to secure said electrical phase connector to the stator by engaging complementary shapes, for example by snapping or fitting or welding. According to a first variant, the electrical coupling means are of the female type. According to a second alternative variant, the first electrical coupling means are of the male type;

- The electrical coupling means comprise at least one curved tab, the curved tab extending opposite the coupling means complementary to the coil so as to form an electrical contact therewith; For example, the electrical coupling means are of the type of a vise formed by a first curved tab and a second curved tab located opposite the first curved tab, the two curved tabs being spaced apart from each other the complementary coupling means of the coil is inserted between said tabs. In other words, each curved tab is bent axially on a side opposite to a face of the electrical phase connector facing the stator. Alternatively, the electrical coupling means comprise a single curved tab extending opposite the coupling means complementary to the coil so as to form an electrical contact therewith;

- The conductive tracks are overmolded by a molding material. The overmolding material is preferably an electrically insulating material, such as for example plastic; - At least one of the conductive tracks further comprises a coupling portion having an additional electrical coupling means collaborating with a complementary coupling means of the coil for electrically connecting a first phase of the winding to a second phase. This makes it possible to achieve an electrical coupling between the phases by means of the phase connector, in particular a triangle-type coupling;

- According to a first alternative, the coupling portion may extend in a circular arc extending the conductive track body. According to another alternative, the coupling portion may extend along a circular arc extending in parallel with said body. In other words the coupling portion extends over a circumferential portion which has a diameter greater than or less than the circumferential portion over which the track body extends.

According to a second aspect of the invention, the winding further comprises a plurality of conductor portions forming neutral points. In this second aspect, the connector comprises at least one neutral conducting track, the neutral conducting track being electrically isolated from the phase conducting tracks and connected to at least one neutral point.

In a manner analogous to the phase conducting tracks, the neutral conducting track is connected to the winding via electrical coupling means which are integral with the neutral conducting track in order to form an electrical reference potential.

The reference electric potential transported by the neutral conducting track is for example a neutral reference signal for each of the electric phases of the electrical machine, also called electric ground.

The electrical phase connector according to the second aspect of the invention can comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

each conducting track extends in a circular contour around a central axis.

According to one embodiment, the circular contour along which each conductive track extends is of the type of an angular segment of a circle, said circular contour being open; each conducting track takes the form of an angular segment. Each angular segment extends around the central axis. Preferably, all the conductive tracks extend at the same radial distance with respect to the central axis;

each neutral conducting track comprises: a conductive track body in the form of an angular segment and, at the ends of said angular segment, electrical coupling means collaborating with complementary coupling means of the winding;

the electrical coupling means are of the type of a vice formed by a first curved tab and a second curved tab located opposite the first curved tab, the two curved tabs being distant from one another so as to that the complementary coupling means of the coil is inserted between said tabs. In other words, each curved tab is bent axially on a side opposite to a face of the electrical phase connector facing the stator;

Advantageously, the curved tabs of the same first electrical coupling means are both integral with the same angular segment. Alternatively, the neutral conducting track comprises several angular segments, each angular segment comprising, at at least one of its ends, a curved tab forming the vice with the curved tab of the directly adjacent angular segment to form the electrical coupling means;

According to a third aspect of the invention, the winding further comprises a plurality of conductor portions forming winding connection points. In this third aspect, the connector comprises a plurality of conductive connection tracks, each conductive connection track being electrically isolated from the phase conducting tracks and connected to at least two connection points to form a connection between two electrical coils of the same winding phase or a connection between two parts of the same electrical coil of the same phase. For example, the connection between two parts of the same coil forms a turning portion forming an angle of 180 ° electrical within the same coil. This portion makes it possible in particular to reverse the direction of the electric current in the phase.

According to an example of this third aspect of the invention, each conductive connection track forms a series connection between two winding connection points of the same phase.

In the same way as the neutral conducting tracks, the conductive connection tracks are connected to the winding via electrical coupling means which are integral with the conductive connection track.

The electrical phase connector according to the third aspect of the invention may comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

each conducting track extends in a circular contour around a central axis.

each conducting track takes the form of an angular segment. Each angular segment extends around the central axis. Preferably, all the conductive tracks extend at the same radial distance with respect to the central axis;

each conductive connection track comprises: a conductive track body in the form of an angular segment and, at the ends of said angular segment, electrical coupling means collaborating with complementary coupling means of the coil;

the electrical coupling means are of the type of a vice formed by a first curved tab and a second curved tab located opposite the first curved tab, the two curved tabs being distant from one another so as to that the means of complementary coupling of the coil is inserted between said tabs. In other words, each curved tab is bent axially on a side opposite to a face of the electrical phase connector facing the stator;

Advantageously, the curved tabs of the same first electrical coupling means are both integral with the same angular segment.

In an embodiment compatible with all the embodiments, the neutral conducting tracks and / or the phase conducting tracks and / or the conductive connection tracks are located in the same radial plane. Alternatively, said tracks are each located in a respective radial plane. Always alternately, said tracks are each located in one or more radial plane which may be identical or different. For example, the phase conducting tracks are located in a first radial plane and the neutral conducting tracks are situated in this same first plane and in a second radial plane different from said first plane.

In an embodiment compatible with all the embodiments, the conductive tracks are located on the same circumference. Alternatively, said tracks are each located in a respective circumference, that is to say radially outside or inside the other conductive tracks. Still alternatively, said tracks are each located in one or more circumferences which may be identical or different.

In an embodiment compatible with all embodiments, the conductive tracks are made of a metal material and electrically conductive, such as for example copper.

In an embodiment compatible with all the embodiments, each part of the conductive track is formed by a folded metal strip so as to be shaped according to the desired configuration.

In an embodiment compatible with all the embodiments, the coil comprises a plurality of electrical conductors, the coil forming a plurality of electrical phases that are distinct from each other, each electrical phase being formed by several electrical conductors connected in series with each other . For example, each electrical phase is formed by several electrical conductors in the form of bar or U. For example, the winding of the stator of electric machine comprises six electrical phases.

For example, the electric machine is of the type of an alternator or an alternator-starter or a reversible machine or an electric motor.

Various embodiments of the invention are provided, integrating, according to all of their possible combinations, the various optional features set forth herein.

Description of figures

Other characteristics and advantages of the invention will become apparent from the description which follows, on the one hand, and from several exemplary embodiments given by way of nonlimiting indication with reference to the appended schematic drawings on the other hand, on which :

- FIGURE 1 illustrates a sectional view of a rotating electrical machine according to an embodiment of the invention;

FIG. 2 illustrates a perspective view of a first embodiment of an electric machine stator according to the invention;

FIGURE 3 illustrates a perspective view of the phase connector of FIG. 2;

FIG. 4 illustrates a perspective view of a second exemplary embodiment of an electrical phase connector according to the invention;

FIG. 5 illustrates a perspective view of an alternative embodiment of the second example of the phase connector of FIG. 4;

FIG. 6 illustrates a perspective view of a third exemplary embodiment of an electrical phase connector according to the invention;

FIGURE 7 illustrates a perspective view of an example of a stator according to the invention; and

- FIGURE 8 illustrates a perspective view of a fourth embodiment of a phase connector according to the invention and its associated stator example.

Of course, the features, variants and different embodiments of the invention may be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive of each other. It will be possible to imagine variants of the invention comprising only a selection of characteristics subsequently described in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

In particular, all the variants and all the embodiments described are combinable with each other if nothing stands in the way of this combination at the technical level.

In the figures, the elements common to several figures retain the same reference.

Detailed description of the invention

With reference to FIGURE 1, an exemplary embodiment of a rotating electrical machine 11 is described. The rotating electrical machine 11 comprises a housing 14. Inside this housing, it further comprises a shaft 13, a rotor 12 integral in rotation with the shaft and a stator 20 surrounding the rotor 12. The movement of Rotation of the rotor is around an axis O. In this example, the casing 14 comprises a front flange 16 and a rear flange 17 which are assembled together. These flanges 16, 17 are hollow in shape and each carries, centrally, a bearing coupled to a respective ball bearing 18, 19 for mounting in rotation of the shaft 13. A pulley 15 is fixed on a front end of the This pulley makes it possible to transmit the rotational movement to the shaft 13 or to the shaft 13 to transmit its rotational movement to the belt. In addition, the rear end of the shaft 13 carries, here, slip rings 21 belonging to a manifold 22. Brooms 23 belonging to a brush holder 24 are arranged so as to rub on the slip rings 21. The door 24 is connected to a voltage regulator (not shown). In addition, the flanges 16, 17 may include openings for the passage of air to allow the cooling of the machine by air circulation generated by the rotation of a fan before 25 on the axial front face of the rotor 12, that is to say at the level of the front flange 16 and a rear fan 26 on the rear axial face of the rotor, that is to say at the rear flange 17. In this example, the rotor 12 is a claw rotor. It comprises two pole wheels 31. Alternatively, the rotor 12 could be formed of a body, for example in the form of a pack of sheets, having recesses for housing permanent magnets.

With reference to FIGURE 2, an exemplary embodiment of an electric machine stator 20 according to the second aspect of the invention is described, said stator 20 comprising: a stator body 210 of cylindrical shape and of axial elongation O, said stator body 210 comprising a plurality of notches 215 formed between its two axial ends 211, 212;

a coil 230 comprising a plurality of electrical conductors 220 wound axially around the stator body 210, each electrical conductor 220 extending axially along a plurality of notches 215, the coil forming a plurality of electrical phases distinct from each other, each electrical phase being formed by several electrical conductors 220 connected in series with each other in the corresponding notches 215; the set of electrical conductors comprises a portion extending into the notches 215 and two portions respectively extending from each axial end of the stator body 210 to form a front bun 231 and a rear bun 232.

The coil further comprises a plurality of first electrical phase input / output electrical connectors 235a, each phase inputs / outputs 235a being electrically coupled with one of the electrical conductors 220 and projecting from the bun, preferably the rear bun, in the axial direction O.

Still with reference to FIGURE 2, a first example of an electrical phase connector 10 is described. This connector comprises electrical coupling means 30b which are respectively secured to the input / phase outputs 235a located opposite. The electrical phase connector 10 will be described in more detail with reference to FIGS. 3 to 8. The phase inputs / outputs 235a make it possible, when the stator 20 is connected to an electrical circuit of an electronic assembly 36, to electrically power the electrical conductors forming the winding of said stator 20. In particular, each input / output phase 235a can feed a different phase. This multiphase power supply thus makes it possible to better control a rotation of the rotor of the electric machine, and in particular to increase a torque of said rotor.

With reference to FIGURES 3 to 8, various embodiments of an electrical phase connector 10 will now be described.

Such an electrical phase connector 10 comprises a plurality of phase conductor tracks 110 electrically insulated from each other, each conducting track 110 making it possible to transport a different electrical phase from or to the stator 20 of the electrical machine. when the electrical phase connector 10 is mounted on said stator 20. In addition, the connector comprises phase electrical coupling means 130b intended to collaborate with complementary coupling means 235a of the stator 20 when the electrical phase connector 10 is mounted on said stator 20, each electrical coupling means 130b being integral with one of the phase conducting tracks. In this case, the complementary coupling means of the stator 20 are the phase inputs / outputs 235 in order to ensure electrical continuity for each of the electrical phases of the electrical machine between, on the one hand, the electrical circuit of the electronic assembly 36 and, on the other hand, the electrical phase connector and the stator 20 of said electrical machine.

In the first exemplary embodiment illustrated in FIGS. 2 and 3, the electrical phase connector 10 comprises at least a second conductive track 120 making it possible to carry an electrical reference potential and thus forming a neutral conducting track. In addition, the connector comprises second electrical coupling means 130a integral with the neutral conducting track 120 and making it possible to collaborate with complementary coupling means 235b of the stator 20 when the electrical phase connector 10 is mounted on said stator 20. case, the complementary coupling means of the stator 20 are neutral points 235b. Similarly to the phase inputs / outputs 235a, the coil has a plurality of neutral points 235b electrically isolated from the phase inputs / outputs 235a. Each neutral point 235b is secured - preferably mechanically and electrically - by means of electrical coupling l30a of the opposite phase connector.

Complementarily, the various coupling means make it possible to mechanically couple the electrical phase connector 10 to the stator 20, by non-permanently securing said electrical phase connector 10 to said stator 20.

Advantageously, the conductive tracks 110, 120 are made of a metallic material and electrically conductive in order to guarantee a minimum resistivity. Preferably, the metallic material chosen is copper. The conductive tracks 110, 120 extend around the central axis O and are delimited at the outer periphery by a generally circular profile. The outer peripheral contour of the phase electrical connector 10 preferably corresponds to the outer peripheral contour of the stator 20 of the electric machine. The conductive neutral track 120 is formed in particular by one or more angular segments forming such an outline around the central axis. In the case where the first conductive track 120 is formed by several angular segments around axis O, each segment is preferably electrically connected to the others in order to guarantee the same electrical potential for all the segments forming said first conductive track 120. As a variant, the connector may comprise two independent phase systems, this is the case for example for a three-phase dual machine, each having a conductive neutral trace 120 as previously described. In the example illustrated in FIGS. 2 and 3, the electrical phase connector 10 comprises two neutral conducting tracks each formed by four parts in the form of angular segments.

Each portion of the conductive track 120 is formed by a folded metal strip to be shaped according to the desired configuration. The metal strip thus takes the form of a very thin strip taken in a direction given by the central axis O. in a plane perpendicular to the central axis O, the metal strip forming said strip 120 has a width, taken in a radial direction relative to said central axis O, greater than its thickness and much less than an elongation length about the central axis. In other words, the thickness of the metal strip forming the conductive track is much smaller than its width, for example by a factor greater than 5; and the width of said metal strip is very much less than its length of elongation about the axis, for example by a factor greater than 20.

The conductive track 120 extends mainly in the same plane substantially perpendicular to the central axis O. More particularly, the first conductive track 120 extends in a generally circular contour around the central axis O. The circular contour according to which extends the conductive track 120 shown in FIGURES 2 and 3 is open: each conductive track 120 thus has two ends not connected to one another.

The conductive track 120 includes a plurality of first electrical coupling means 130a to connect said conductive track 120 to the stator 20. In the example illustrated in FIGURES 2 and 3, each conductive track 120 comprises three electrical coupling means 130a. For example, each electrical coupling means 130a of the conductive track 120 is formed by a first segment 22b located radially outside a second segment 22a of said track 120. All the electrical coupling means 130a of the conductive track 120 are for example formed on first segments l22b located at the same radial distance from the central axis O. Still for example, all the first segments l22b of the conductive track 120 are located radially outside the second segment 22a of said conductive track 120.

As can be seen more particularly in FIG. 2, the first electrical coupling means 130a are configured to connect said electrical phase connector 10 to the stator 20 by engaging complementary shapes, for example by snapping or fitting or by welding with the neutral points. 235b of the stator winding 20. More particularly, each first electrical coupling means 130a forms a vice. Such a vice is formed by a first curved lug 131 and a second curved lug 132 facing the first curved lug 131. The two curved lugs 131, 132 are spaced from one another to leave a space in which the corresponding neutral point 235b of the stator 20 can be introduced. Advantageously, each curved tab 131, 132 forming the vice of the electrical coupling means 130a is bent axially, so that one end of each curved tab 131, 132 extends axially protruding from the portion of the neutral conducting track 120 from which it is derived. As seen in FIGURES 2 and 3, each first conductive track 120 comprises a plurality of angular segments, each end of which is formed by a curved tab 131, 132. Two curved tabs 131, 132 of two adjacent angular segments of the conductive track 120 form a first electrical coupling means 130a as described above.

In a manner similar to the neutral conducting track, the phase conductive tracks 110 extend in a generally circular contour around the central axis O. Each phase conductive track 110 is electrically isolated from the other phase track and the track neutral conductor 120 in order to be able to transport a different electrical phase to or from the stator 20 to which the electrical phase connector 10 is intended to be connected. In the example illustrated in FIGS. 2 and 3, the electrical phase connector 10 comprises six phase conducting tracks 110.

Each phase conductive track 110 is formed by a metal strip folded to be shaped in the desired configuration. The metal strip thus takes the form of a very thin lamella taken in a direction given by the central axis O. In a plane perpendicular to the central axis O, the metal strip forming each track conductive 110 has a width - taken in a radial direction relative to said central axis O - greater than its thickness and much less than an elongation length about the central axis O. In other words, the thickness of the metal strip forming each conductive track 110 is much smaller than its width, for example by a factor greater than 5; and the width of said metal strip is much less than its length of elongation about the central axis O, for example by a factor greater than 20.

Advantageously, the metal strip forming the conductive tracks 110 has a thickness and a width identical to that forming the conductive track 120. Preferably, the metal strip forming the conductive tracks 110 is made of the same material as that forming the conductive track 120 .

All the conductive tracks 110 extend, on the one hand, in the same plane substantially perpendicular to the central axis O, and on the other hand in an axial direction O. More particularly, each conductive track 120 comprises a first portion 112 which extends along a circular segment about the central axis O and a second portion 111 which extends in an axial direction O. The second portion 111 of each second conductive track 110 is located at at least one end of the corresponding first part 112.

The conductive tracks 110 each comprise a second electrical coupling means 130b in order to connect each conducting track 110 to the stator 20. The second electrical coupling means 130b of the conductive tracks 110 are, for example, arranged on different diameters. Alternatively, the second electrical coupling means 130b of the conductive tracks 110 may be located at the same radial distance from the central axis O. In addition, for example, the second electrical coupling means 130b and the first electrical coupling means 130a are for example, arranged on different diameters. Alternatively, the first electrical coupling means 130a and all the second electrical coupling means 130b may be located at the same radial distance from the central axis O.

As seen more particularly on the LIGURE 2, the second electrical coupling means 130b are configured to secure said electrical phase connector 10 to the stator 20 by engaging complementary shapes, for example by snapping or fitting or by welding with the inputs / phase outputs 235a of the stator winding 20. More particularly, each second electrical coupling means 130b forms a vice, as previously described with reference to the first coupling means 130a, in which can be introduced corresponding phase input / output 235a of the stator 20. Preferably, each curved lug 131, 132 forming the vice of the second coupling means 130b is bent axially, so that one end of each curved tab 131 , 132 extends axially projecting relative to the first portion 112 of the phase conductor track 110 from which it is derived.

As previously described, the second portion 111 of the conductive tracks 110 extends axially projecting from the first corresponding portion of said tracks 110 to facilitate the electrical connection to the electrical circuit of the electronic assembly 36 with which the electrical phase connector 10 is intended to collaborate. Advantageously, and as visible in FIG. 2, the second portion 111 of the second conductive tracks 110 may comprise an electrical connection terminal 115. The electrical connection terminal 115 advantageously takes the form of a female terminal in order to facilitate the connection. welding and / or crimping and / or screwing of an electrical connection means of the corresponding power module of the electronic assembly with the electrical phase connector 10.

Advantageously, all the second portions 111 of the phase conductive tracks 110 of the electrical phase connector 10 and / or all the electrical connection terminals 115 of said electrical phase connector 10 are situated at the same radial distance with respect to the axis central O, along an outer peripheral contour of said electrical phase connector 10.

Each first portion 112 of all the conductive tracks 110 advantageously takes the form of an angular segment which extends around the central axis O at the same radial distance with respect to said central axis O.

Each conductive track 110 comprises, at a first end of the first portion 112, one of the second electrical coupling means 130b and, at a second end, the electrical connection terminal 115 and / or the second axial extension portion 111.

For example, all the first electrical coupling means 130a and all the second electrical coupling means 130b and all the electrical connection terminals 115 of the second conductive tracks and / or all the corresponding second axial elongation portions 111 are located at the same location. radial distance from the central axis O. Alternatively, these elements could each be located on a different circumference and therefore at different radial distances from the central axis O. In the exemplary embodiments illustrated in the FIGURES, the phase conductive tracks 110 are located axially above the neutral conducting tracks 120. Alternatively, the phase conductive tracks 110 could be located below the neutral conducting tracks 120. alternatively, only part of one of the tracks 110, 120 may be located below and / or above the other parts of the other tracks.

Still on the examples illustrated here, the phase conductive tracks 110 are all located radially outside the second segments 12a of the neutral conducting tracks 120. Alternatively, the phase conductive tracks 110 are all located radially inside the second In any case, only part of one of the tracks 110, 120 may be located radially inside and / or outside the other parts of the other tracks.

In the exemplary embodiment illustrated in FIG. 2, the conductive tracks 110, 120 are overmolded by an over-molding material 140, preferably electrically insulating, such as, for example, plastic. Thus, the phase connector of FIG. 2 and that of FIG. 3 differ from each other only in the presence of this overmoulding material 140.

FIGS. 4 and 5 illustrate a second exemplary embodiment of an electrical phase connector 10. This connector differs from that of the first example only in the angular configuration of the second axial extension parts 111 and / or the electrical connection terminals 115 conductive tracks of phase 110. The other characteristics are identical to the first embodiment. Furthermore, the phase connector of FIGURE 4 and that of FIGURE 5 differ from each other only in the presence of overmolding material 140.

This new angular configuration of the second parts 111 of axial elongation and / or the electrical connection terminals 115 makes it possible to adapt the stator 20 to the arrangement of the power modules of the electronic assembly 36 while having a standard stator winding where the angular arrangement of the phase inputs / outputs 235b is the same regardless of the structure of the electronic assembly.

In a third exemplary embodiment illustrated in FIGS. 6 and 7, the stator has a triangle-type coupling, that is to say that the phase connector 10 does not comprise a track. neutral conductor 110 and the coil 230 does not have a neutral point 235b, with respect to the star coupling presented with reference to FIGURES 2 to 5.

In this third example, FIG. 6 illustrates an example of an electrical phase connector 10 comprising a plurality of phase conductive tracks 110. In this example, the conductive tracks are not overmolded by an overmolding material. Alternatively, said tracks may be overmoulded by an overmolding material 140 in the same manner as for the connectors 10 of the examples of FIGURES 2 and 5. FIGURE 7 illustrates an example of a standard stator 20 on which the phase connector 10 of FIG. 6 can be mounted.

In this third example, at least one of the phase conductive tracks 110 comprises a coupling portion 160 extending from the body of said track formed by the first part 112. Preferably, each conducting track 110 comprises a coupling portion 160 Each coupling portion 160 has at one free end coupling means 130d with a phase input / output 135a of the coil, said means 130d may be identical to the coupling means 130b. Thus, each conductive track 110 makes it possible both to connect a phase of the winding to the electronic assembly 36 and to connect two phases of the winding together to form the coupling in a triangle. The coupling portion 160 may extend along the same circumference as the first portion 112 so as to form the same circular arc. Alternatively, the coupling portion 160 may extend radially inwardly and / or radially outwardly relative to the first portion 112. Still alternatively, only a portion of the coupling portion 160 may be located radially at a distance from the first portion 112. inside and / or outside the first part 112. Similarly, the coupling portion 160 may extend on the same radial plane or be located at least partly on a different radial plane located below or above that comprising the first part 112. Each phase conductive track 110 may have a structure different from that of the other phase conducting tracks of the same connector 10 or, alternatively, an identical structure.

Still in this example, the coupling means 30b of the conductive tracks 110 are formed solely by a curved portion 131 which can be welded to the corresponding phase input / output output 235a of the winding. Alternatively, the coupling means 130b may be formed by a vice comprising two curved portions 131, 132 as explained above. Similarly, the coupling means 130a, 130b described above may comprise a single curved portion welded to the corresponding part of the coil. FIG. 8 illustrates a fourth embodiment of a connector 10 and a stator 20 in which the stator has phase inputs / outputs 135a and neutral points 135b and the connector comprises phase-conducting tracks 110 and tracks. In this example, the winding further comprises winding connection points 235c being electrically coupled with one of the electrical conductors 220 of the winding and projecting from the bun, preferably rear bun, in the axial direction O. As for the neutral points 235b, the connection points 235c are connected to conductive connection tracks 150 of the electrical phase connector 10 via coupling means 130c which can be identical to the coupling means 130a neutral conducting tracks 120 described above. These connection points 235c may form a connection between two electrical coils of the same phase of the coil 230 or a turning portion forming an angle of 180 ° electrical within the same coil.

In this example, the electrical phase connector 10 then comprises a plurality of conductive connection tracks 150 which can be formed in the same manner as the neutral conducting tracks 120. These conductive tracks each comprise a body extending in particular in the form of an angular segment and at least two coupling means 130c respectively disposed at the ends of said body so as to cooperate with respective coupling means 235c of the winding. These coupling means 130c may have a form of vice such as said coupling means 130a, 130b of the first or second embodiment or a form of a single curved portion such as said coupling means 130b of the third embodiment.

Alternatively, this embodiment of FIGURE 8 can also be applied to a stator which has a triangle type coupling, that is to say without neutral point l35b, the connector 10 will then comprise phase conducting tracks 110 and conductive connection tracks 150.

In the third and fourth exemplary embodiments, the angular disposition of the second portions 111 of axial elongation and / or electrical connection terminals 115 of the phase conductive tracks 110 may change to correspond to a particular arrangement of the electronic assembly without changing. the winding 230 of the stator 20. The invention thus makes it possible to produce at lower cost, in comparison with the production of a complete rotating electrical machine, a rotating electrical machine whose base formed by the stator is identical for several machine models and of which only the interfacing device electrical changes depending on the arrangement of the electronic assembly. Of course, the invention is not limited to the examples that have just been described and many adjustments can be made to these examples without departing from the scope of the invention. In particular, the various features, shapes, variants and embodiments of the invention can be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other. In particular all the variants and embodiments described above are combinable with each other.

Claims

claims

1. A rotating electric machine for a vehicle, said machine comprising:

an electronic assembly for controlling said machine,

a stator (20) comprising a stator body (210) having a plurality of notches (215) formed between its two axial ends (211, 212) and a coil (230) mounted in the stator body via said notches, the coil having a plurality of conductor portions forming phase inputs / outputs (235a), and

an electrical phase connector (10) for electrically interfacing the winding with the electronic assembly;

the connector comprising a plurality of phase-conductive tracks (110) electrically insulated from one another, each conductive track (110) being connected on the one hand to an element of the electronic assembly and on the other hand to an input / output phase

(235a) for transporting an electrical phase to or from the stator.

2. Rotating electrical machine according to the preceding claim, wherein the phase conductive track (110) comprises:

a conducting track body in the form of an angular segment,

at a first end of said angular segment, an electrical connection portion (111, 115) extending in a substantially axial direction for connection with the electronic assembly, and

- At a second end of said angular segment, electrical coupling means (130b) collaborating with complementary coupling means of the coil (230).

3. rotary electrical machine according to the preceding claim, wherein the electrical coupling means (130b) comprise at least one curved tab (131, 132), the curved tab (131, 132) extending opposite the complementary coupling means winding so as to form an electrical contact with the latter.

4. The rotary electric machine according to claim 2 or 3, wherein the conductive track (110) further comprises a coupling portion (160) having an additional electrical coupling means (130b) collaborating with a complementary coupling of the winding (230) for electrically connecting a first phase of the winding (230) to a second phase.

The rotary electrical machine according to any one of the preceding claims, wherein the conductive tracks (110) are overmolded, at least partially, by an overmoulding material (140).

The rotary electric machine according to any one of the preceding claims, wherein:

the winding (230) further comprises a plurality of conductor portions forming neutral points (235b),

the connector (10) comprises at least one neutral conducting track (120), the neutral conducting track being electrically isolated from the phase conducting tracks (110) and connected to at least one neutral point (235b).

7. A rotary electrical machine according to the preceding claim, wherein the neutral conducting track (120) comprises a conductor track shaped in the form of an angular segment and, at the ends of said angular segment, electrical coupling means (130a) collaborating with complementary coupling means of the winding (230).

8. rotary electrical machine according to the preceding claim, wherein the conductive neutral track (120) comprises a plurality of angular segments, each angular segment comprising, at at least one of its ends, a curved tab (131, 132) forming the vise. with the curved tab (131, 132) of the directly adjacent angular segment to form the electrical coupling means (130a).

the winding (230) further comprises a plurality of conductor portions forming winding connection points (235c),, the connector (10) comprises a plurality of conductive connection tracks (150), each connecting conductive track being electrically isolated from the phase conducting tracks (110) and connected to at least two connection points (235c) to form a connection between two electrical coils of the same phase of the winding or a connection between two parts of the same electrical coil of the same phase of the winding.

10. Rotating electrical machine according to the preceding claim, wherein each connecting conductive track (150) forms a series connection between two winding connection points of the same phase.

11. A rotary electrical machine according to the preceding claim, wherein the conductive connection track (150) comprises a conductor track shaped angular segment and at the ends of said angular segment, electrical coupling means (130c) collaborating with complementary coupling means of the winding (230).

12. A rotary electrical machine as claimed in any preceding claim, wherein the coil comprises a plurality of electrical conductors, the coil forming a plurality of electrical phases distinct from each other, each electrical phase being formed by a plurality of electrical conductors connected to each other. series of each other.