Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
  • H02K15/08—Forming windings by laying conductors into or around core parts
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
  • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/46—Fastening of windings on the stator or rotor structure
  • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
  • H02K3/505—Fastening of winding heads, equalising connectors, or connections thereto for large machine windings, e.g. bar windings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
  • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
  • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

• the present invention relates to alternators for motor vehicles.
• an alternator for a motor vehicle comprises a stator provided with a body carrying several phases, each comprising, on the one hand, an inlet and an outlet located outside the body of the stator, and on the other hand , electrically conductive elements, which are arranged in networks on either side of the stator body to form a first and a second chignon and which pass through said body.
• the electrically conductive elements are interconnected to form said networks and connect the phase input to the phase output by forming at least one winding.
• the inputs of the phase windings are connected in star or y, the outputs of the phases are connected to a rectification and / or control device for rectifying the induced alternating current into a direct current, while the inputs are connected to a neutral point.
• the object of the present invention is to create this neutral point in a simple and economical manner.
• an alternator of the above-mentioned type is characterized in that one of the chignons door on one side of the stator, on the one hand, three inputs and, on the other hand, an electrically conductive connecting portion of circumferential orientation electrically connecting said inputs.
• the inputs are simplified since there is no need to extend them to connect them to a common neutral point; this connection being produced in a simple and economical manner by the connection part located in the vicinity of the stator body. Thanks to the connection part, the neutral point is compactly integrated into the stator.
• phase inputs are advantageously standardized and shorter, which makes it possible to reduce the electrical resistance.
• the connecting part allows an increase in the electrical power of the alternator.
• the connecting part is a light adaptation part or part segment, which is carried by one of the buns.
• This circumferential orientation part is compact, has a size which depends on the applications and makes it possible to make the stator more compact. It promotes a reduction in the electrical resistance of the stator and a standardization of the outputs.
• the connecting part is fixed by any appropriate means to the inputs.
• the connecting part is connected by welding to at least one of said inputs.
• the connecting part has in one embodiment an annular sector shape by being fixed on the inlets. There is thus formed a comb with the entrances.
• the connecting part has the form of an annular sector mounted on the external periphery of the chignon carrying said entries and whose width is oriented axially.
• the connecting part therefore consists in an embodiment of a simple bar.
• This bar is advantageously perforated to facilitate its expansion and the ventilation of its carrying bun, in particular when the bar is of axial orientation.
• connection part can be fixed on the internal or external periphery of the inputs.
• the connecting part is located axially between the tops of the electrically conductive elements, formed by the axial ends of these elements belonging to the bun concerned, and the body of the stator.
• the connecting part is located axially at the tops of the electrically conductive elements, formed by the axial ends of these elements belonging to the bun concerned.
• the connecting part is a connecting piece connecting the inputs.
• the inputs each comprise a free part of axial orientation, the connecting part connecting these free parts.
• the inputs each comprise a free part of circumferential orientation, the connecting part connecting these free parts.
• two inlets are connected by a pin, the connecting part consisting of an end portion of the third inlet bent in the circumferential direction and being welded to said pin.
• said two inlets connected by said pin are consecutive following the periphery of the bun.
• said two inputs connected by said pin are not consecutive by following the periphery of the bun, said third inlet being connected to said pin by a peripheral end portion.
• the connecting part is extended by a free portion of axial orientation.
• the connecting part constitutes a circumferential extension of one of the three inlets.
• the other two inputs are connected to the connecting part each by a circumferential end portion.
• the inlets and the connecting part are located on a circumference of different diameter, for example greater, than that on which the three outlets associated with the inlets are located.
• the inlets and outlets are located on the same circumference.
• outlets belong to the same bun as the inlets and extend in axial projection relative to the inlets equipped with the connecting part and this in the direction opposite to the stator body.
• the windings of electrically conductive elements can be of the type with separate coils or with entangled coils, of the corrugated and / or nested type.
• the windings are of the bar type in order to obtain buns of short length, to facilitate the fixing of the connecting part and to obtain strong currents at low voltages.
• the bars are advantageously generally of rectangular section to increase the section of the electrically conductive elements and to facilitate the fixing of the connecting part on the inputs.
• the electrically conductive elements, the inputs and the outputs are in the form of bars.
• the electrically conductive elements, the inputs and the outputs are in the form of bars of square or rectangular section.
• the stator with connecting part according to the invention can be mounted in all types of alternator.
• the alternator can have more than three phases.
• the alternator is in an embodiment of the hexaphase type.
• the six phase windings have inputs connected to a neutral point as described for example in document FR-A-1 541 530.
• the connecting part connects the six inputs to each other.
• two series of three phases connected to two rectifying devices are provided as described for example in documents FR - A- 2 687 861. The alternator is then fitted with either two connecting parts when each series of three phases comprises a neutral point, or of a connecting part when one of the three-phase series has a neutral point and the other three-phase series has windings mounted in a triangle.
• Each phase comprises in one embodiment at least two windings as described for example in documents EP-A-0 762 603 and WO 92/06527.
• the connecting part is made from an electrically conductive element.
• the inlets and the connecting part are in one embodiment located on one side of the body and the outlets on the other side of said body.
• the inputs, the outputs and the connecting part are in another embodiment located on the same side of the stator body.
• FIG. 1 is a half-view in axial section of an alternator with schematic representation of the stator equipped with a connecting piece according to the invention
• Figure 2 is a perspective view of the stator of Figure 1 with removal of electrically conductive elements to show the notches of the stator
• Figure 3 is a schematic view of the connection of the phase windings
• Figure 4 is a perspective view of the electrically conductive elements of Figure 1
• Figures 5 to 7 are views similar to Figures 2 to 4 for a second embodiment of the invention
• Figure 8 is a cross view of an alternative embodiment of the connecting part 1 according to the invention
• Figure 9 is a cross-sectional view of the stator of Figure 8
• Figure 10 is a cross view of another alternative embodiment of the connecting part 1 according to the invention
• Figure 11 is a cross-sectional view of the stator of Figure 10.
• Figure 12 is a cross-section of another embodiment of the invention
• Figure 13 is a cross-section of the stator of Figure 12
• Figure 14 is a cross-sectional view of an alternative embodiment of the invention shown in Figure 13
• FIG. 15 is a transverse view of another variant of the embodiment of the invention shown in FIG. 13
• Figure 16 is a cross-sectional view of another variant of the embodiment of the invention shown in Figure 13
• Figure 17 is a cross-sectional view of another embodiment of the invention.
• FIG. 1 represents a polyphase rotary electrical machine in the form of a compact alternator with internal ventilation of the three-phase type for a motor vehicle with internal combustion engine.
• the alternator comprises, going from left to right of FIG. 1, that is to say from front to back, a drive pulley 1 secured, here by means of a nut, of the front end of a shaft 2, the rear end of which carries slip rings (not referenced) belonging to a manifold 3.
• the axis of the shaft 2 constitutes the axis of rotation of the machine.
• the shaft 2 supports the rotor 4 with an excitation winding 5, the ends of which are connected by wire connections to the collector 3.
• the rotor 4 is here a claw rotor and therefore has two pole wheels front and rear 6, 7 each carrying a front fan 8 and rear 9 respectively for, in a given axial size, increasing the power of the alternator and reducing noise thereof.
• Each wheel 6, 7 is fixed on the shaft 2 provided with knurled portions for this purpose as visible in FIG. 1.
• Each wheel has a flange perpendicular to the axis of the shaft 2.
• the excitation winding 5 is installed axially between the two wheels 6,7. At the outer periphery of the flanges are formed of material extending axially.
• the teeth have a trapezoidal shape and are laterally provided with chamfers.
• the teeth of one of the wheels are directed towards the other wheel while being angularly offset with respect to the teeth of this other wheel. There is thus nesting of the teeth so that in an alternative embodiment of the permanent magnets are interposed between the teeth to further increase the power of the machine.
• profiled grooves are provided in the lateral edges of the teeth to receive the permanent magnets as described in document FR-A-2 748 248.
• each tooth has, relative to an axis of axial symmetry, two anti-noise chamfers.
• the alternator is therefore less noisy.
• the fans 8, 9 comprise a first series of blades or blades, which form ventilation channels between them.
• two series of blades of different length are provided as described in document FR-A-2 811 156. Thus at least one blade of the second series of blades is interposed between two consecutive longer blades of the first series of blades.
• the blades are produced by cutting and folding a fixed flange, for example by welding or any other means such as crimping, on the pole wheel 6, 7 concerned.
• Each wheel has, as mentioned above, axial teeth directed towards the other wheel, with nesting of the teeth from one wheel to another for formation of magnetic poles when the winding 5 is activated by means of the collector rings of the collector 3, each in contact with a brush (not referenced) carried by a brush holder 10 also serving as a support for a voltage regulator (not visible) electrically connected to the brushes to regulate the tension of the winding 5.
• the regulator is connected to a current rectifying device 11, such as a diode bridge (two of which are visible in FIG. 1), itself connected to the outputs of the phases provided with windings, which the stator 13 of the alternator.
• a current rectifying device 11 such as a diode bridge (two of which are visible in FIG. 1)
• the bridge is here of the type described in document EP-A-0 743 738 to which reference will be made for more details.
• This bridge therefore comprises a positive heat sink on which the positive diodes are mounted, a negative heat sink, on which the negative diodes are mounted, and a connector.
• the negative sink is formed by the flange of the rear bearing 16 of the alternator described below.
• the bridge is of the type described in document FR 01 09 482 filed on 07/16/2001.
• the positive dissipator includes cooling fins, which extend in the radial direction of the alternator; the negative diodes carried by the rear bearing being cooled by convection and conduction.
• This type of bridge is well suited to one high power alternator according to the invention.
• the stator 13, forming an armature surrounds the rotor 4 and has a body 14 internally provided with axial notches 39, 39 ′ for the passage of the wires or pins which the windings comprise.
• the body 14 here consists of a packet of sheets each having notches. These oblong notches form grooves when the sheets are aligned and open at the internal periphery of the body 14.
• the body 14 surrounds the rotor 4 with the presence of a radial air gap between the internal periphery of the body 14 and the external periphery of the rotor 4.
• the windings are arranged in networks to form at their ends buns 12, 12 ′ extending, on the one hand, in axial projection on either side of the body 14; and, on the other hand, radially above the fans 8, 9.
• the bearings 15, 16 are metallic, being here based on aluminum. These bearings comprise, in known manner, lugs for fixing the alternator to a fixed part of the motor vehicle and electrical connection of the alternator to ground.
• the bearings 15, 16 are perforated for internal ventilation of the alternator via the fans 8, 9 when the fan assembly 8, 9 - rotor 4 - shaft 2 is rotated by the pulley 1 connected to the engine of the motor vehicle by a transmission device comprising at least one belt engaged with the pulley 1.
• This ventilation makes it possible to cool the windings of the buns 12, 12 ′ and the winding 5, as well as the brush holder 10 with its tension regulator and the straightening device 11.
• the arrows followed by the cooling fluid, here air are shown by arrows in FIG. 1 through the various openings of the bearings 15, 16 and inside the machine.
• This device 11 the brush holder, as well as an openwork protective cover (not referenced) and preferably made of plastic, are mounted for fixing by the rear bearing 16 so that the rear fan 9 is more powerful than the front fan 8.
• the bearings 15, 16 are interconnected, here using screws or alternatively by non-visible tie rods, to form a casing or support intended to be mounted on a fixed part of the vehicle. This support carries the body 14.
• the bearings 15, 16 each carry a ball bearing 17, 18 centrally to rotationally support the front and rear ends of the shaft 2 passing through the bearings to carry the pulley 1 and the collector rings 3.
• the blades of the fans 8, 9 extend radially above the housings presented by the bearings 15, 16 for mounting the bearings 17 and 18, which are thus ventilated.
• the alternator is cooled by a coolant, such as the cooling water of the internal combustion engine of the motor vehicle; the rear bearing comprising channels as described for example in document DE-A-100 19 914 to which reference will be made for more details.
• the stator is in this case mounted using buffers made of elastic material, for example elastomer, on the casing to filter vibrations and reduce noise. The same is true in FIG. 1, the buffers with a cross-section in the form of a square being not referenced.
• These buffers intervene between the free ends of the peripheral portion of axial orientation of the bearings and the axial ends facing the body 14.
• These buffers constitute elastic damping means with radial and axial action for mechanical decoupling of the body 14 from the stator with respect to the housing constituted by the bearings 15, 16.
• the bearings also each comprise a transverse flange carrying the ball bearing 17,18 concerned centrally and connecting to the peripheral part concerned.
• the elastic damping means intervene at the level of the notches 39, 39 ′ between the edges thereof and the electrically conductive elements, described below, mounted therein as described in document FR 99 16369 filed on 12/23/1999 and published under the number FR-A-2 803 126.
• the elastically deformable thermally conductive resin is interposed radially between the external periphery of the body 14 and the internal periphery of one of the bearings, such as the front bearing, as described in document FR 00 13527 filed on 06/10 / 2000.
• the winding 5 of the rotor 4 can be formed from a conductive element wound and coated with a bonding layer, for example of the thermosetting type, as described in document FR-A-2 809 546. The winding 5 gives off more heat which is dissipated by the thermally conductive resin.
• the body 14 is mounted directly on the bearings.
• the rotor has salient poles as described in document FR 01 00122 filed on 01/01/2001; permanent magnets being received in housings made in the sheet pack that the rotor comprises. These housings are open towards the external periphery of the rotor and closed axially by non-magnetic parts intended to come into abutment against the magnets.
• the alternator is of the three-phase type and comprises three phases 20 to 22 with, for each of them, respectively an input El to E3 and an output SI to S3.
• the outputs are connected to the rectifying device 11 of the electric current knowing that the phases of the stator 13 produce an alternating current when the rotor is excited and is driven in rotation by the vehicle engine via the pulley 1. For this reason it is necessary to rectify the alternating current for supply the vehicle's electrical consumers with direct current and recharge the vehicle's battery.
• the alternator is of the hexaphase type and therefore comprises, in addition to the phases 20 to 22 constituting a first series of three phases, a second series of three phases 23 to 25 with, for each of them, respectively an entry E'1 to E'3 and an output S'1 to S '3.
• the outputs are connected in aforementioned manner to the rectifying device 11, as described for example in the aforementioned document EP-A-0 743 738; the connector of the device 11 comprising lugs for fixing the outputs belonging to a network of electrically conductive pads.
• the outputs are fixed to the tabs, for example by crimping or welding.
• Each phase comprises at least one winding comprising electrically conductive elements 37, 38.
• the alternator for a motor vehicle comprises a stator 13 provided with a body 14 carrying several phases 20 to 25 each comprising, on the one hand, an input El to E ' 3 and an output SI to S'3 located outside the body 14 of the stator 13, and on the other hand, electrically conductive elements 37, 38 which are arranged in a network on either side of the body 14 of the stator 13 to form a first 12 and a second 12 'buns which pass through said body.
• the electrically conductive elements 37, 38 are interconnected to form said networks and connect the input of the phase to the output of the phase by forming at least one winding.
• These conductive elements are here in the form of bars.
• the bars here have a rectangular section and advantageously belong to pins.
• the conductive elements are here mounted in pairs in the radial direction in the notches; the length of the bars being parallel to the lateral edges of the notches.
• an alternator of the type indicated above is characterized in that one of the chignon carries on one side of the body 14 of the stator 13 three inputs El to E3 - E'1 to E'3, an electrically conductive connecting part 50 of circumferential orientation connecting together said inputs El to E3 and another 51 the inputs E'1 to E'3.
• Each connecting part is formed by an attached connecting piece or connected pin portions.
• the connecting part here metallic, for example made of copper, therefore makes it possible to form the neutral point in a compact, simple and economical manner. This part is light and allows to reduce the weight of the stator.
• the connection part makes it possible to standardize the inputs El to E3 - E'1 to E'3, here of the same length and identical section.
• the connecting part advantageously has the same section as that of the inputs.
• phase inputs and outputs have identical sections to those of the electrically conductive elements, in particular for economic reasons.
• the connecting part 50, 51 is generally connected by welding to said inputs.
• the connecting part 50, 51 has, according to one characteristic, an annular sector shape to reduce the size and the electrical resistance of the stator 13.
• This sector has a length in a circumferentially oriented arc, a width and a height.
• the height or thickness is less than the width.
• the annular sector constituting the connecting part 50, 51 has an axial orientation width to minimize the diametral size of the stator and avoid any interference with the external periphery of axial orientation of the support 15, 16 of the alternator.
• the width is oriented radially. In the embodiment shown in Figures 2 to 11 this connecting part therefore consists of an independent part in the form of a curved bar.
• This connecting piece 50, 51 is covered with a layer of electrically insulating material and is stripped at the level of the inputs El to E3 - E'1 to E'3 for its welding to them.
• the part 50, 51 is enameled.
• the entries are welded across the width of the part 50.51. More precisely, the entrances having a rectangular section, it is the width of the entrances which is welded over the width of the part 50.51, that is to say flat.
• the inputs El to E3 of FIGS. 2 to 4 are located on a circumference of the same diameter as that on which the outputs SI to S3 are implanted with the presence of a slight clearance between the connecting piece and the two outputs S2, S3 surrounded by room 50; the other output SI is circumferentially offset with respect to the part 50.
• the inputs E'1 to E'3 and the connecting piece 50, 51 are located on a circumference of diameter different from that on which the outputs S'1 to S3 are located associated with said inputs.
• the inputs E'1 to E'3 and the connecting piece 50, 51 are located on a circumference of diameter greater than that on which the outputs S'1 to S'3 are located associated with said inputs.
• This arrangement facilitates the connection of the outputs S'1 to S'3 with the straightening device 11 because the outputs are closer radially to the device 11.
• the positioning of the connecting piece 50, 51 and its attachment to the entries are simpler and faster.
• the structures can be reversed so that, as a variant, the inputs E1 to E3 - E'1 to E'3 and the connecting piece 50, 51 are located on a circumference of diameter smaller than that on which the outlets are located. SI to S3 - S'1 to S'3 associated with said inputs.
• the outputs SI to S3 - S'1 to S'3 belong to the same bun 12, 12 'as the inputs El to E3 - E'1 to E'3 and extend in axial projection relative to the inputs
• the outputs are located at the rear of the stator 13 and are adapted to pass in a known manner through the rear bearing 16 to connect to the rectifying device 11 with diodes.
• the length of the outlets therefore depends on the position of the device 11.
• the outputs SI to S3 - S'1 to S'3 do not belong to the same bun 12, 12 'as the inputs El to E3 - E'1 to E'3. In all cases the outlets extend in axial projection relative to the bun concerned.
• the buns 12, 12 ′ are axially of the same axial length due in particular to the presence of the fan 9.
• one of the buns is axially longer than the other.
• the connecting piece may be adjacent to the tops of the electrically conductive elements 37, 38, which here are electrically insulated from one another and from the pack of sheets, which the stator 13 presents in known manner for forming the body 14.
• these elements 37, 38 as well as the inputs El to E3 - E'1 to E'3 and the outputs SI to S3 - S'1 to S'3 are covered with a layer of electrically insulating material.
• these constituents are enamelled.
• the position of the connecting piece may vary.
• the connecting piece 50, 51 can be located axially between the tops of the electrically conductive elements 37, 38, formed by the axial ends of these elements 37, 38 belonging to the bun 12, 12 ′ concerned, and the body 14 of the stator 13. The room the link is therefore located axially between the tops of the bun and the body 14.
• the connecting piece is located at one of the internal or external peripheries of the bun concerned.
• the connecting piece is located at the outer periphery of the bun 12 thus partially surrounded by this piece in order to hinder the ventilation of this bun as little as possible.
• this part is located at the internal periphery of the bun.
• the electrically conductive elements 37, 38 the inputs and outputs are in the form of metal bars of rectangular section and the body 14 of the stator 13 has, as mentioned above, a pack of sheets provided with notches 39, 39 ′ traversed by the electrically conductive elements 37, 38.
• the conductive elements 37 are, as mentioned above, bars of rectangular section here shaped in a U shape and therefore have branches mounted by axial threading in the notches 39, 39 'and a bottom connecting the branches to the outside of the body 14
• the ends of the branches are connected together by welding to the outside of the body 14.
• the distance between two notches 39, 39 ′ containing the branches intended to be welded to each other corresponding to a magnetic pole pitch between a North pole and a South pole of the rotor.
• the bottoms of the TJ are twisted so that one of the branches of the U, called the upper branch, is mounted in the bottom of a notch while the other branch, called the lower branch, is mounted at the level of the through part d 'a next notch of the same phase.
• the conductive elements 37 are therefore mounted in lower and upper layers in the notches, being electrically isolated from each other.
• the electrically conductive elements 37 are connected in series between the inputs and outputs concerned to constitute at least one winding per phase.
• phase windings are here of the corrugated type so that in known manner the phase windings are offset circumferentially with respect to each other.
• the welded ends of the branches and the bottoms of the U of the electrically conductive elements 37 are therefore arranged in networks on either side of the body 14 of the stator 13 to form the first bun 12 'and the second chumble 12.
• the chignon 12, located at the rear of the alternator, includes the inputs and outputs of the phases as well as the bottoms of the U forming the heads of the pins 37 constituting the electrically conductive elements.
• the bun 12 ' has the welded ends of the pins 37 passing axially through the body 14. This arrangement facilitates the manufacture of the stator 13.
• the pins 37 are in two parts so that the welds exist at the heads of the pins 37 and of the bun 12.
• the pins and therefore the bars can be of round or square section.
• the buns 12, 12 ′ are of short length.
• the rotor 4 has polar wheels each provided with eight teeth which corresponds to 16 magnetic poles (8 poles per wheel 6, 7) while the stator has 96 notches.
• this number depends on the applications. For example, we can adopt a layout with 12 magnetic poles and 72 notches. As a variant, each pole wheel 6, 7 has 7 poles.
• each phase has two windings and a pair of conductive elements 37 are provided per notch 39.
• 38 shows inversion pins as described in the document WO 92/0657, to which reference will be made for more details, for connecting the first winding to a second winding of the same phase.
• the reversing pins 38 extend axially and circumferentially. They are each located below an outlet.
• each pair of adjacent notches of the same phase is offset from the next pair of adjacent notches of this phase by a number of notches necessary for mounting the windings of the other phases.
• the conductive elements are therefore mounted superimposed in each notch to form at least one pair of conductive elements mounted superimposed and formation of a lower layer or inner layer and an upper layer or outer layer.
• a single connecting piece 50 is provided to connect the three inputs El to E3 and constitute the neutral point.
• the windings of the same phase are connected in series.
• the windings are mounted in parallel so that there are six phases as shown in FIGS. 5 to 7.
• each notch 39 ′ and the alternator of the hexaphase type therefore comprises, in addition to phases 20 to 22, constituting a first series of three phases, a second series of three phases 23 to 25 with for each of them respectively an input E ′ I to E'3 and an output S'1 to S'3.
• Two series of three inputs and two series of three outputs are therefore planned.
• Both series of three phases are connected in parallel so that two rectifying devices, for example diodes, are provided. These two devices are in an embodiment mounted side by side and symmetrically as in the document FR - A 2 687 861.
• the two series of three phases each have a neutral point as visible in Figure 6 so that there are two connecting pieces 50, 51 each connecting together the three inputs of the same series of three phases.
• the connecting pieces 50, 51 are offset circumferentially with respect to each other by being located on the same circumference with a diameter greater than that of the location of the outlets.
• one of the series includes windings mounted in a triangle so that only one connecting part is provided.
• the entries are formed by half-pins each comprising a rectilinear middle portion passing axially through a notch 39, 39 ′ and two end portions extending on either side of the middle portion.
• the inputs are circumferentially offset from the outputs, while in Figures 5 to 7 the inputs and outputs are aligned radially. In all cases, the outputs and the inputs belong to a bar passing through the body 14.
• Each terminal portion of an entry has an inclined portion connecting to the middle portion and extended by a free rectilinear portion. It is therefore the free and rectilinear parts of axial orientation which are intended to be welded to the connecting piece 50, 51.
• the inputs belong to branches mounted at the outer periphery of the notches 39, 39 '.
• FIGS. 8 to 16 show several alternative arrangements of the connecting parts 50, 51.
• the terminal part of the inputs is shorter so that the electrical resistance is further reduced.
• Each connecting part 50, 51 is formed by a part in the form of an annular segment which is welded by its width (flat) to the appropriate lateral face of each end part.
• the connecting piece 50 is adjacent to the relevant axial end of the body 14 of the stator.
• the straight free ends of each end portion of the inlets and are bent in the circumferential or peripheral direction and constitute tabs on which is then welded a connecting piece. It is the thickness of the part which is used for welding; the tabs increasing the welding area.
• this part is situated at the level of the tops of the buns which distances it from the windings of the phases.
• two first neutral inputs are connected by a pin 160 having a portion extending circumferentially and being in one piece with the inclined portions of two pins forming two inputs E2-E3 which succeed the periphery of the bun.
• the third neutral input El has an end portion which is curved in the circumferential direction. It extends to the part 160 so as to be able to be connected to the latter by a single connection point produced for example in the form of a weld 162 by electron beam. Welding is therefore carried out, considering the rectangular section of the pin 160, at the level of the length of the pin.
• the end portion 160 ′ is welded to the face of the part 160 which is axially external.
• the portion 160 ′ of the third neutral input El can extend beyond the welding point by a free portion of axial orientation 163 of short length, as in FIG. 14, or of very long length, as on the FIG. 15. This latter arrangement is particularly advantageous for connecting the three inputs to the current rectifying device 11.
• the two inputs E2, E3 connected by the peripheral pin portion 160 are not consecutive following the periphery of the bun (12, 12 '), the third input El being interposed between them.
• the connecting part 50, 51 constitutes an extension of a rectilinear part of an inlet, here El, axially passing through a notch 39, 39 '.
• the connecting part has the form of an annular sector of axial orientation to which the other two inputs E2, E3 are connected, for example by welding.
• the end of each input E2, E3 is curved so as to form a fixing lug parallel to the part 50, 51, under the latter in the axial direction of the stator.
• the part 50, 51 is located at the top of the bun. It is possible in this way to connect the neutral point with two welds connecting three conductors.
• the lower pair of the first notch is connected by the bottom of the U of the pins to the upper pair placed in a third consecutive notch of the same phase; the second and third notches being arranged symmetrically on either side of the first notch, being separated from the latter by a number of notches necessary for the implantation of the electrically conductive elements of the other phases.
• the alternator is an alternator-starter, ie a reversible machine constituting an alternator when the pulley is driven by the engine of the motor vehicle or a starter to drive the vehicle engine via the pulley as described for example.
• alternator-starter ie a reversible machine constituting an alternator when the pulley is driven by the engine of the motor vehicle or a starter to drive the vehicle engine via the pulley as described for example.
• one of the bearings 15, 16 carries at least one sensor, for example of the magnetic type for detect the passage of a magnetic target carried by the rotor.
• the righting bridge is then a righting and control bridge, which in one embodiment is located outside the reversible alternator.
• the phase outputs are then connected to a connector carried by the alternator and connected to the rectification and control device by a cable.
• the electrical machine according to the invention with a connecting part is a high power machine, compact, low noise and well cooled.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Synchronous Machinery (AREA)
• Windings For Motors And Generators (AREA)
• Insulation, Fastening Of Motor, Generator Windings (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Motor Or Generator Cooling System (AREA)
• Permanent Magnet Type Synchronous Machine (AREA)

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Publications (1)

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• 2001
  • 2001-10-19 FR FR0113553A patent/FR2819117B1/fr not_active Expired - Fee Related
  • 2001-12-21 US US10/204,565 patent/US7145273B2/en not_active Expired - Lifetime
  • 2001-12-21 WO PCT/FR2001/004147 patent/WO2002050976A2/fr active Application Filing
  • 2001-12-21 EP EP01990612A patent/EP1264386A2/de not_active Withdrawn
  • 2001-12-21 MX MXPA02008076A patent/MXPA02008076A/es active IP Right Grant
  • 2001-12-21 KR KR1020027010869A patent/KR20020076319A/ko not_active Application Discontinuation
  • 2001-12-21 MX MXPA02008077A patent/MXPA02008077A/es active IP Right Grant
  • 2001-12-21 EP EP01989658A patent/EP1344297A2/de not_active Withdrawn
  • 2001-12-21 WO PCT/FR2001/004148 patent/WO2002050977A2/fr active Application Filing
  • 2001-12-21 JP JP2002551965A patent/JP4173734B2/ja not_active Expired - Fee Related
  • 2001-12-21 KR KR1020027010867A patent/KR20020076318A/ko not_active Application Discontinuation
  • 2001-12-21 FR FR0116658A patent/FR2818822B1/fr not_active Expired - Fee Related
  • 2001-12-21 US US10/204,566 patent/US6930424B2/en not_active Expired - Lifetime
  • 2001-12-21 JP JP2002551966A patent/JP2004516785A/ja active Pending

Non-Patent Citations (2)

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