EP4038728A1 - Bobinage électrique pour une machine électrique tournante - Google Patents
Bobinage électrique pour une machine électrique tournanteInfo
- Publication number
- EP4038728A1 EP4038728A1 EP20780238.0A EP20780238A EP4038728A1 EP 4038728 A1 EP4038728 A1 EP 4038728A1 EP 20780238 A EP20780238 A EP 20780238A EP 4038728 A1 EP4038728 A1 EP 4038728A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pins
- conductive
- feed
- crossing
- supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02K3/28—Layout of windings or of connections between windings
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/06—Embedding prefabricated windings in the machines
- H02K15/062—Windings in slots; Salient pole windings
- H02K15/063—Windings for large electric machines, e.g. bar windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/06—Embedding prefabricated windings in the machines
- H02K15/062—Windings in slots; Salient pole windings
- H02K15/064—Windings consisting of separate segments
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/06—Embedding prefabricated windings in the machines
- H02K15/062—Windings in slots; Salient pole windings
- H02K15/065—Windings consisting of complete sections, e.g. coils or waves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes 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
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
-
- 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
- H02K3/04—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
- H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
-
- 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
- H02K3/48—Fastening of windings on the stator or rotor structure 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
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
Definitions
- the invention relates in particular to an electrical winding for an active part such as a stator or a rotor of a rotating electrical machine.
- the invention relates more particularly to an electrical winding made from conductive pins.
- a reversible machine is a rotating electrical machine capable of working in a reversible manner, on the one hand, as an electric generator in alternator function and, on the other hand, as an electric motor for example to start the heat engine of the motor vehicle. .
- a rotating electrical machine consists of a movable rotor rotating about an axis and a stationary stator.
- the stator comprises a body having a yoke forming a part of revolution about an axis passing through the center of the stator.
- the body has teeth extending radially from the yoke towards the center of the stator and defining notches around which an electrical coil is disposed.
- the coil is formed by a plurality of conductive pins partially housed in the notches of the body and electrically connected in pairs via their ends to form a continuous electrical path.
- each pin comprises two conductive segments substantially parallel to each other and connected by an angled junction so as to form a “U”.
- the conductive segments are inserted at a first axial end face of the stator, in two separate notches, so that the conductive segments are substantially parallel to the axis of revolution of the stator.
- the same notch can accommodate several segments belonging to separate pins thus forming different layers of conductive segment.
- the free ends of the conductive segments, protruding from a second axial end face of the stator, are then connected together so as to form electrical paths generating magnetic fields along the teeth of the body when they are traversed by a current. electric.
- the conductive pins are connected in pairs so as to form different sets, each set being able in particular to correspond to an electrical supply phase.
- the stator has three separate assemblies to allow a three-phase current supply to the winding.
- Such a winding requires a certain number of connections between the supply pins forming the inputs and outputs of each phase in order to connect the phases together and thus ensure the coupling of the desired coil and also between the supply pins and the electronic modules of the coil. corresponding power to connect said inputs and outputs of each phase to said modules.
- the feed pins may be located in the notch on outer layers of the coil.
- the feed pins are not surrounded radially by other pins.
- Power pins with only one conductive segment are then not properly held in the notch.
- their free end can move radially towards the outside of the coil.
- the free ends can then come into contact with another element of the rotating electrical machine such as the rotor, for the pins arranged on the inner layer of the stator, or one of the flanges of the casing, for the pins arranged on the outer layer of the stator. stator, and damage the rotating electrical machine.
- the free ends can also come to bear against the teeth of the stator body or of the cylinder head and thus damage the enamel which covers them and create short circuits.
- the present invention aims to make it possible to avoid the drawbacks of the prior art.
- the present invention therefore relates to an electrical winding for an active part, formed in particular of a stator or a rotor, of a rotating electrical machine, the active part comprising a body having an annular yoke around a axis and a plurality of teeth extending from a lateral face of the cylinder head in a radial direction so as to define notches, said notches being open on a first axial end face and on a second end face axial body.
- the electrical winding has at least one phase system comprising several electrical phases each comprising a set of pins being electrically connected to each other and each having at least one conductive segment, said conductive segments intended to be housed in the same notch form N layers.
- Said set of pins has at least a first feed pin and a second feed pin each forming a phase input or output.
- each feed pin has a feed end extending from the associated conductive segment outside of the notch.
- at least part of a first feed end is arranged on an inner periphery of the coil, said first end extending a conductive segment arranged in an outer layer.
- a second supply end is arranged on an outer periphery of the coil, said second end extending a conductive segment arranged in an inner layer, the inner periphery being closer to G axis as the outer periphery and said inner and outer layers forming edge layers.
- first feed end and the second feed end each have a crossing portion arranged circumferentially facing each other.
- the first feed pin extends in an outer layer of a notch and the second feed pin extends in an inner layer of a notch, said inner and outer layers forming edge layers.
- the conductive segments of said first and second feed pins are arranged respectively in the outer layer and in the inner layer of the same notch.
- edge layer is understood to mean a layer located at an inner or outer radial end of the coil, that is to say a layer which is not central.
- the feed pins are arranged in layers respectively forming the inner periphery and the outer periphery of the coil. This arrangement of the feed pins in edge layers as opposed to central layers simplifies the connections between the coils within the phase by allowing these connections to be made between central layers which are therefore adjacent.
- each notch comprises N segments belonging to different pins.
- a layer is formed by a single segment of a pin.
- the first end and the second end are spaced apart, in a circumferential direction, from each other.
- the crossing parts are spaced from each other and are therefore not in contact. This is to prevent potential short circuits between the power supply ends ⁇
- said first and second supply ends each have a connecting part adjacent to the associated conductive segment, a connection part intended to be connected to an electronic assembly of the electrical machine and a crossing part arranged between said. connecting part and said associated connecting part, said connecting and connecting parts of a same supply end being opposed to each other, in a radial direction with respect to the crossing part of said same end feeder and the crossing portions of the first and second feed ends extending opposite each other in a circumferential direction.
- the pins are intended to form chignons on either side of the axial end faces of the stator body respectively.
- the crossing parts are arranged axially at a distance from the buns.
- the crossing parts extend between the outer periphery and the inner periphery of the coil and in particular in a radially central portion between said peripheries. This makes it possible to simplify the process for making the winding by applying the same stresses on the supply ends.
- the crossing portions may extend into an inner edge portion or an outer edge portion of the coil.
- a first assembly arranged on one of the peripheries of the coil and formed of feed pins of different phases, comprises at least one feed end having a crossing part and at least one other feed end not. showing no crossing part.
- a second assembly arranged on one of the peripheries of the coil different from the periphery of the first assembly and formed of feed pins of different phases, comprises at least one feed end having a crossing part and at least another feed end not having a crossing part.
- Each assembly therefore comprises at least one supply end forming a phase input and at least one other supply end forming a phase output.
- feed end not having a crossing part is meant a feed end extending substantially axially on the same periphery as that in which its associated conductive segment is arranged.
- all of the feed ends could have crossing parts. Still for example, when an assembly comprises two feed ends having crossing parts, the feed end not having a crossing part is arranged circumferentially between said end parts having a crossing part. Similarly, when an assembly includes a feed end having a portion of crossing, said feed end having the crossing part is arranged circumferentially between the end parts not having a crossing part.
- the coil comprises at least one holding member arranged to hold, at least in a radial direction, two supply ends not having a crossing part.
- the retainer makes it possible to hold the feed ends of the feed pins to prevent said ends from moving and coming into contact with either the stator body or the rotor or the casing of the rotating electrical machine.
- the retaining member may form an interconnector making it possible to connect the power supply ends to one another or to connect the power supply ends to the electronic assembly.
- the retaining member may have a conductive trace.
- the conductive trace can be at least partially covered by an electrically insulating material.
- the retaining member can be formed only from an electrically insulating material.
- the pins other than the feed pins are each formed of two conductive segments interconnected at one of their end extending from the first axial end face of the body, called the first end, and connected. to different pins at the other of their end extending from the second axial end face of the body, called the second end, the first ends of the feed pins extending from said first end face axial.
- the first feed pin has a different shape from that of the second feed pin.
- each power pin has a single conductive segment and two ends.
- the two ends of the first feed pin extend in opposite circumferential directions relative to each other and the two ends of the second feed pin extend in the same circumferential direction. .
- the coil comprises a first group of conductive pins whose conductive segments are each arranged in two distinct layers and separated from each other by at least one intermediate layer, a second group of conductive pins the conductive segments of which are each arranged in two distinct layers and separated from each other by at least one intermediate layer, the layers comprising the first group of pins being distinct from the layers having the second group of pins and a connecting pin for connecting the first group of pins to the second group of pins.
- the conductive segments of the connection pin are arranged in two adjacent layers.
- adjacent layers is understood to mean successive layers which are not separated by another layer. This simplifies the insertion of the pins during the winding process and also simplifies the shape of the connecting pin.
- the adjacent layers in which the conductive segments of the connection pin are arranged are central layers.
- central layer is meant a layer which is surrounded by two other layers and which is therefore not at the edge of the notch.
- each conductive segment of a power pin is intended to be disposed in one of the notches comprising a conductive segment of a connection pin.
- the power pins are used to connect the winding to an electronic power and / or control module.
- each phase comprising a plurality of conductive pins, at least one connection pin and a number of feed pins equal to twice the number of connection pins.
- the layers comprising the conductive segments of the conductive pins of the first group of pins are alternated with the layers comprising the conductive segments of the conductive pins of the second group of pins.
- the inner radial layer includes a conductive segment of a conductive pin of the first group of pins
- the outer radial layer includes a conductive segment of a conductive pin of the second group of pins.
- the conductive pins of the first group of pins respectively have different shapes from those of the conductive pins of the second group of pins.
- the conductive pins of the first group of pins each comprise two free ends respectively extending the two conductive segments, said ends being curved so as to approach each other in a circumferential direction.
- the conductive pins of the second group of pins each comprise two free ends respectively extending the two conductive segments, said ends being curved so as to move away from each other in a circumferential direction.
- a subject of the present invention is also an active part of a rotating electrical machine, formed in particular of a stator or of a rotor, which comprises an electrical winding as described above.
- the present invention also relates to a rotating electrical machine comprising an active part, formed in particular of a stator or of a rotor, which comprises an electrical winding as described above.
- the rotating electric machine can advantageously form an alternator, an alternator-starter, a reversible machine or an electric motor.
- FIG. 1 shows, schematically and partially, a sectional view of an example of a rotating electric machine.
- FIG. 2 schematically represents a perspective view of the stator of FIG. 1.
- FIG. 3 schematically shows a sectional view along a radial plane of part of the stator of Figure 2.
- FIG. 4 schematically shows a perspective view of a conductive pin of the first group of pins of the stator of Figure 2.
- FIG. 5 schematically shows a perspective view of a conductive pin of the second group of pins of the stator of Figure 2.
- FIG. 6 schematically shows a perspective view of a connecting pin of the stator of Figure 2.
- FIG. 7 schematically shows a perspective view of a first supply pin of the stator of Figure 2.
- FIG. 8 schematically shows a perspective view of a second stator feed pin of Figure 2.
- FIG. 9 partially shows an electrical diagram of the stator winding of FIG. 2.
- FIG. 10 shows, schematically and partially, a perspective view of the stator according to an example of the invention.
- FIG. 11 show, respectively and schematically, an axial top view of a part of the winding comprising traces of interconnection according to the example of FIG. 10.
- the [Fig. 12] schematically represents an example of a retaining member.
- FIG. 1 represents an example of a compact and polyphase rotary electrical machine 10, in particular for a motor vehicle.
- This machine 10 converts mechanical energy into electrical energy, in alternator mode, and can operate in motor mode to transform electrical energy into mechanical energy.
- This rotary electric machine 10 is, for example, an alternator, an alternator-starter, a reversible machine or an electric motor.
- the machine 10 comprises a casing 11. Inside this casing 11, it further comprises a shaft 13, a rotor 12 integral in rotation with the shaft 13 and a stator 15 surrounding the rotor 12.
- the rotational movement of the rotor 12 takes place around an X axis.
- the axial direction corresponds to the X axis, passing through the shaft 13 at its center, while the radial orientations correspond to planes concurrent, and in particular perpendicular, to the X axis.
- the internal name corresponding to an element oriented towards the axis, or more close to the axis with respect to a second element, the external name designating a distance from the axis.
- the housing 11 comprises a front flange 16 and a rear flange 17 which are assembled together. These flanges 16, 17 are hollow in shape and each carry a central bearing coupled to a respective ball bearing 18, 19 to allow rotation of the shaft 13.
- the housing 11 comprises fixing means 14 allowing mounting the rotary electric machine 10 in the vehicle.
- a drive member 20 such as a pulley or a pinion can be fixed on a front end of the shaft 13.
- This member makes it possible to transmit the rotational movement to the shaft or to the shaft to transmit its movement. rotation.
- the front / rear denominations refer to this member.
- a front face is a face oriented in the direction of the organ while a rear face is a face oriented in the opposite direction of said organ.
- the front flange 16 and the rear flange 17 are here arranged so as to form a chamber for the circulation of a cooling liquid such as water or oil.
- the flanges could include openings for the passage of a flow of cooling air generated by the rotation of at least one fan integral in rotation with the rotor or the shaft.
- the rotor 12 is formed from a bundle of sheets housing permanent magnets forming the magnetic poles.
- the rotor could be a claw rotor comprising two pole wheels and a rotor coil.
- the stator 15 comprises a body 21 formed of a bundle of sheets provided with notches 22, equipped with notch insulation 23 for mounting an electric winding 24.
- the winding passes through the notches of the. body 21 and form a front bun 25a and a rear bun 25b on either side of the body of the stator.
- the coil 24 is formed of one or more phases comprising at least one electrical conductor and being electrically connected to an electronic assembly 26.
- the electronic assembly 26, which is here mounted on the casing 11, comprises at least one electronic power module making it possible to control at least one phase of the winding 24.
- the power module forms a voltage rectifier bridge to transform the alternating voltage generated into a direct voltage and vice versa.
- the electronic assembly could be deported from the machine.
- FIGS 2 and 3 show in more detail the stator 15.
- the body of the stator 21 is formed of a yoke 27 of annular shape around the axis X and a plurality of teeth 28 extending radially in the direction of the center. stator from the yoke, and in particular here from a side face forming an internal wall of the yoke 27.
- the teeth 28 are distributed angularly regularly around the perimeter of the annular body, with successive spaces formed between them to so as to define the notches 22 extending in series around the periphery of the annular body of the stator, each notch being delimited by two successive teeth.
- the teeth define 48 notches distributed along the circumference of the stator body, these notches being arranged to form support for the electric winding 24.
- a different number of notches can be used such as 96, 84. , 72, 60. It is understood that this number depends in particular on the application of the machine, on the diameter of the stator and on the number of poles of the rotor.
- the notches 22 are open on a first axial end face 29a and a second axial end face 29b of the stator body 21.
- the notches pass axially right through the body and open out on the two opposite axial end faces of the stator.
- axial end faces is meant faces perpendicular or substantially perpendicular to the axis of revolution X of the stator.
- each phase comprises a plurality of conductive pins 30, 31, a connection pin 32 and two power pins 33, 34.
- each pin conductive 30, 31 is formed of two conductive segments 30A, 30B, 31 A, 31B extending axially in the notches 22 and which are for this purpose substantially parallel to each other. Said conductive segments are connected to each other through an angled junction 30C, 31C which is also conductive so as to form an electrical continuity.
- the connecting pin 32 is formed of two conductive segments 32A, 32B extending axially in the notches 22 and which are for this purpose substantially parallel to each other. Said conductive segments are connected to each other via a 32C angled junction which is also conductive so as to form an electrical continuity.
- the conductive segments 30A, 30B, 31A, 31B, 32A, 32B of the same pin 30, 31, 32 are arranged in two notches separate from each other.
- Each angled junction 30C, 31C, 32C can have two inclined portions 30D, 31D, 32D meeting to form a vertex 30E, 31E, 32E.
- the bent junctions 30C, 31C, 32C are here formed integrally and in particular come from material with the associated conductive segments.
- each pin 30, 31, 32 is formed integrally in the shape of a U.
- the bent junctions can be formed in two parts connected together for example by welding, each part of the bent junction being made from material with the associated driver segment.
- each pin 30, 31, 32 is formed by two sub-pins, each being I-shaped.
- the feed pins 33, 34 are each formed of a conductive segment 33A, 34A extending axially into the notches 22.
- the various conductive segments arranged in the same notch are superimposed in order to form a stack of N layers Ci, it being understood that these N layers are present in each of the notches so that annular circles that are substantially coaxial with each other are formed on the periphery of the stator.
- these layers are four in number and numbered from C1 to C4, according to their stacking order in the notches 22.
- the first layer C1 corresponds to the outer layer
- the second layer C2 corresponds to a directly adjacent outer central layer.
- the third layer C3 corresponds to the internal central layer directly adjacent to the second layer C2
- the fourth layer C4 corresponds to the internal layer.
- Layers C1 and C4 form border layers and layers C2 and C3 form core layers.
- the first layer C1 is thus occupied by the conductive segment closest to the cylinder head 27 and the layer C4 is thus occupied by the conductive segment closest to the notch opening, that is to say the closest of the X axis.
- the invention is not limited to this single embodiment so that a greater number of conductive segments can be stacked in each notch, for example 6, 8 or 10 conductors.
- a layer is formed by a single conductive segment.
- each notch 22 comprises N conductive segments aligned radially with respect to each other on a single line and each forming a layer Ci.
- the conductive segments each have a substantially rectangular section facilitating their stacking in the notch. .
- Figures 4, 5, 6 and 7 illustrate the different shapes of pins forming the electrical coil 24.
- the description below is given in relation to a phase of the electrical coil, those skilled in the art will understand that all the phases are formed. in an identical manner.
- the conductive pins 30, 31 forming the first or second groups of pins are differentiated by the free ends 30F, 31F of the conductive segments, axially opposite from the bent junctions 30C, 31C.
- FIG. 4 shows a conductive pin 30 of the first group of pins, all of the pins 30 of the first group being of identical shape.
- This conductive pin 30 is characterized by two free ends 30F of conductive segments which are curved so as to approach each other. More particularly, the free ends 30F of the conductive segments are folded over to overlap one another in a radial direction. The distance between the two free ends 30F of the conductive segments of the same pin 30 is smaller than the distance between these two conductive segments 30A, 30B in their straight portion housed in the notches.
- FIG. 5 shows a conductive pin 31 of the second group of pins, all the pins 31 of the second group being of identical shape.
- This conductive pin 31 is characterized by two free ends 31F of conductive segments which are curved so as to move away from one another.
- the spacing between the two free ends 31F of the conductive segments of the same pin 31 is greater than the spacing between these two conductive segments 31A, 31B in their straight portion housed in the notches. More particularly, the conductive segments 31 A, 31B of the same pin are spaced apart by a pitch P so as to be respectively inserted into a notch E and into a notch E + P, and the free ends 31F of these conductive segments are respectively spaced by a step 2P.
- connection pin 32 which are characterized in particular by two free ends 32F of conductive segments which are curved so as to maintain the same spacing as that of the conductive segments 32A, 32B.
- the spacing between the two free ends 32F of the conductive segments of the same pin 32 is similar to the spacing between these two conductive segments 32A, 32B in their straight portion housed in the notches. More particularly, the conductive segments 32 A, 32B of the same pin are spaced apart by a pitch P so as to be respectively inserted into a notch E and into a notch E + P, and the free ends 32F of these conductive segments are respectively spaced at the same pitch P.
- FIG. 7 shows a first feed pin 33 which has a single conductive segment 33 A, a first end 33G, called the feed end, and a second end 33F, called the free end.
- the free end 33F is disposed on the same side of the stator as the free ends 30F, 31F, 32F of the other pins and the supply end 33G is disposed on the axially opposite side, that is to say on the side of the junctions cubits 30C, 31C, 32C.
- the ends 33F, 33G are bent in opposite circumferential directions, that is, said ends are not axially superimposed.
- Figure 8 shows a second feed pin 34 which has a single conductive segment 34A and a first end 33G, referred to as the feed end, and a second end 33F, referred to as the free end.
- the free end 34F is disposed on the same side of the stator as the free ends 30F, 31F, 32F of the other pins and the supply end 34G is disposed on the axially opposite side, that is to say on the side of the junctions cubits 30C, 31C, 32C.
- the ends 34F, 34G are bent in the same direction, that is to say that said ends are axially superimposed.
- the particular arrangement of the feed ends 33G, 34G will be described in more detail below with reference to Figure 10.
- each pin 30, 31, 32, 33, 34 is arranged so that on the one hand its conductive segments extend in two distinct notches E and E + P, separated by a pitch P, and that on the other hand each bent junction is disposed at the level of the first axial end face 29a while the free ends are disposed at the level of the second axial end face 29b and are interconnected by so as to generate electrical continuity in the winding from one pin to another.
- each pin 30, 31, 32, 33, 34 is arranged so that on the one hand its conductive segments extend in two distinct notches E and E + P, separated by a pitch P, and that on the other hand each bent junction is disposed at the level of the first axial end face 29a while the free ends are disposed at the level of the second axial end face 29b and are interconnected by so as to generate electrical continuity in the winding from one pin to another.
- the free ends of conductive segments arranged in a first layer C1 and the free ends of conductive segments arranged in a second layer C2 are interconnected and the free ends conductive segments arranged in a third layer C3 and the free ends of conductive segments arranged in a fourth layer C4 are interconnected.
- These connections are for example made by soldering.
- the conductive segments 30A, 30B, 31A, 31B, 32A, 32B, 33A, 34A of the same pin are connected to one another at one of their ends by an angled junction 30C, 31C, 32C and, each, to another pin at their free end 30F, 31F, 32F, 33F, 34F.
- the first group of conductive pins 30 form a so-called outer group, which comprises the pins 30 whose conductive segments 30A, 30B are housed in the notches so as to form the first outer layer C1 and the third inner central layer C3.
- the second group of conductive pins 31 form a so-called inner group, which comprises the pins 31 of which conductive segments 31A, 31B are housed in the notches so as to form the fourth inner layer C4 and the second outer central layer C2.
- the two groups of pins are nested, that is to say arranged so that one of the conductive segments of the pins 30 of the outer group is located in the notches more to the interior as one of the conductive segments of the pins 31 of the interior group.
- a conductive pin 30 belonging to the first group is arranged in the stator so as to have a conductive segment 30A occupying a first layer C1 in a notch E and a conductive segment 30B occupying a third layer C3 in a notch E + P.
- a conductive pin 31 belonging to the second group is arranged in the stator so as to have a conductive segment 31 A occupying a second layer C2 in the notch E and a conductive segment 31B occupying a fourth layer C4 in a notch E + P .
- the conductive pins 30, 31 are arranged so that the conductive segments of the same conductive pin occupy separate notches with a radial offset of two layers from one notch to the other, or in other words with the interposition of an intermediate layer between the two layers occupied by the conductive segments of this same pin.
- This radial offset corresponds to the interposition of a conductive segment belonging to a conductive pin of the other group.
- the result of this particular arrangement is an alignment of the bent junctions at the level of the first axial end face 29a of the stator body 21 so that the adjacent bent junctions are substantially parallel to each other. This increases the compactness of the bun.
- connection pin 32 is arranged to electrically connect the first group of conductive pins 30 to the second group of conductive pins 31 and thus form a single electrical path and form a phase of the winding electrical 24.
- this connection pin 32 closes the electrical circuit and allows an appropriate flow of current through the winding, in particular so that, on the one hand, the current flows in the same direction in each of the conductive segments housed in the same notch. , and that on the other hand the current flows generally in one direction in a notch and in the opposite direction in the notches spaced by a pitch P and -P.
- the first conductive segment 32A of the connection pin 32 is disposed in one of the layers associated with the first group of conductive pins 30 and the second conductive segment 32B of said pin is arranged in one of the layers associated with the second group of conductive pins 31.
- This arrangement gives advantages of electrical connection of the coil. Indeed, it makes it possible to connect all the conductive pins 30, 31 via a connection pin 32 in the shape of a U, that is to say of a shape similar to that of the conductive pins with two conductive segments connected to each other by a junction cubit. With this arrangement, the electric winding 24 therefore does not include a special pin allowing the reversal of the direction of the current in order to respect the direction of flow of the electric current in the notches. Thus, this makes it possible to simplify the electrical winding and its assembly process.
- the first conductive segment 32A of the connection pin 32 is arranged in the third layer C3 and the second conductive segment 32B of said pin is arranged in the second layer C2.
- the conductive segments 32A, 32B of the connection pin are arranged in two adjacent layers in a radial direction of two different notches, that is to say that there is no interposition of a intermediate layer between the two layers occupied by the conductive segments of this same pin 32. This allows the angled junction 32C of the connecting pin to be integrated into the bun and not to increase the height of the bun by passing through- above another pin portion.
- feed pins 33, 34 are arranged in a notch so that their respective conductive segments 33A, 34A are disposed in a layer adjacent to the layer of the same notch comprising the conductive segment 32 A, 32B of a connection pin 32.
- a conductive segment 33A of a supply pin 33 to occupy a first layer C1 in said notch E.
- a conductive segment 34A is provided a feed pin 34 to occupy a fourth layer C4 in said notch E + P, spaced by a pitch P with respect to said notch E.
- the feed pins 33, 34 are thus arranged in border layers so as to e Surround the connection pin 32 with the same phase whose conductive segments 32A, 32B are arranged in central layers.
- connection pin 32 is associated with a pair of supply pins 33, 34 as can be seen in FIG. 2 in particular.
- an electrical winding 24 comprising six phases also comprises six pairs of supply pins 33, including six first supply pins 33 and six second supply pins 34, and six connection pins 32.
- the number conductive pins 30, 31 depends on the number of notches in the stator and therefore on the application of the desired rotary electrical machine, in particular the desired performance and the space available, knowing that there are as many pins conductors 30 of the first group as conductive pins 31 of the second group.
- the supply ends 33G, 34G form current inputs and / or outputs of the corresponding phase.
- one end 33G, 34G of one of the supply pins is connected, directly or via an interconnection device, to one end 33G, 34G of a supply pin d.
- the feed pins 33, 34 are arranged along the electrical coil 24 respectively in the first outer layer C1 and in the fourth inner layer C4.
- the first feed pins 33 together with their feed end 33G are disposed in the outer layer C1 and the second feed pins 34 and their feed end 34G are disposed in the inner layer C4. It is of course possible to reverse this arrangement of the feed pins without departing from the scope of the invention.
- FIG. 10 represents an exemplary embodiment of the invention in which is illustrated a part of the winding of the stator and in particular of the bun from which extend the supply ends 33G, 34G.
- four of the six feed ends 33G, 34G each have a crossing part 33G2, 34G2 and the other two feed ends 33G, 34G not having a crossing part and extend in one direction. substantially axial from their associated conductive segment 33 A, 34A.
- the feed ends having no crossing part are arranged circumferentially between the feed ends having the crossing parts.
- only two of the six feed ends 33G, 34G may each have a crossing portion 33G2, 34G2 and the other four feed ends 33G, 34G not having a crossing portion.
- the feed ends having crossing parts could then be arranged circumferentially between the feed ends not having crossing parts.
- Each of said four power supply ends has a connecting portion 33G1, 34G1 adjacent to the associated conductive segment 33A, 34A, a connection portion 33G3, 34G3 electrically connected to the electronic assembly 26 and a crossing portion 33G2, 34G2 arranged between said connecting part and said associated connecting part.
- Said parts extend continuously one after the other from the conductive segment of the same supply pin and substantially form a straight line which extends inclined with respect to an axial direction. This inclined straight line extends from one of the peripheries of the coil to the radially opposite periphery.
- said connecting and connecting portions of a same supply end are opposed to each other, in a radial direction with respect to the crossing portion of said same supply end which forms a substantially part.
- Two feed pins 33, 34 whose conductive segments extend in the same notch 22, have feed ends of the same type, that is to say either of the type comprising a crossing part or of the type not having no crossing part.
- the crossing portions 33G2, 34G2 of supply end of pins arranged in the same notch extend opposite and at a distance from each other in a circumferential direction. There is therefore no contact between the crossing parts. This spacing is in particular of the order of a few millimeters.
- the crossing parts 33G2, 34G2 are arranged at a distance from an axial end of the bun 25a from which the feed ends extend. Said crossing parts are therefore axially spaced from the axial end of the bun. This axial spacing is for example between 5 mm and 35 mm.
- the feed end 33G has a connecting portion 33G1 extending from an outer periphery of the coil and a connecting portion 33G3 extending to an inner periphery of said coil.
- the feed end 34G has a link portion 34G1 extending from an inner periphery of the coil and a connection portion 34G3 extending to an outer periphery of said coil.
- the output of one phase is connected to the input of another phase of the same phase system to form a triangle-type coupling.
- Each of these connections between the phase inputs and outputs is also connected to a current source included in particular in an electronic power and / or control module of the electronic assembly 26.
- connection parts 33G, 34G are arranged along the electrical coil 24 so that their connection parts 33G3, 34G3 are grouped into a first set 36 and a second set 37 for each phase system.
- the connection parts of the same assembly are axially aligned with the same Ci layer of the notch.
- the first assembly 36 comprises connection parts arranged above the outer layer C1 and the second assembly comprises connection parts arranged above the inner layer C4.
- the electrical coil 24 comprises two systems each comprising three phases.
- the coil here comprises two first sets 36 and two second sets 37 each comprising three connection parts 33G3, 34G3.
- the structures of the assemblies may be the same or different from one phase system to another.
- Each of the assemblies 36, 37 comprises at least a connection part forming a phase input and a connection part forming a phase output.
- each assembly 36, 37 comprises either two connection parts forming phase inputs and a connection part forming a phase output or two connection parts forming phase outputs and a connection part forming an input phase.
- the assemblies of the same phase system have complementary architectures to each other.
- each set includes a phase connection part of said phase system.
- each connection part belongs to a different phase.
- FIG. 11 shows an example in which the first assembly 36 comprises two connection parts forming phase outputs and a connection part forming a phase input and the second assembly 37 comprises two connection parts forming phase inputs and a part connection forming a phase output.
- the connection parts are arranged on the same layer of the notch and therefore extend over a circumferential portion of the coil.
- the ends forming the phase output / input are alternated, in a circumferential direction. That is to say that for an assembly comprising two phase outputs and one phase input, said phase input is disposed circumferentially between the phase outputs. Similarly, for an assembly comprising two phase inputs and one phase output, said phase output is disposed circumferentially between the phase inputs.
- the distance, in a circumferential direction, between the feed ends is identical within the same assembly 36, 37.
- the same assembly 36, 37 comprises at least one connection part 33G3 and at least one connection part 34G3 belonging to two different supply pins 33, 34.
- This alternation of the phase inputs / outputs within a same set is created here by the inversion of the connection parts 33G3, 34G3 for only some of the supply ends of the phase system which are the supply ends having a crossing part.
- the first set includes the connection part forming the phase output then the second set includes the connection part forming the phase input.
- FIG. 11 illustrates an example in which the first assembly 36 comprises in the following order: the connection part forming the output of the third phase O / Z + 2, then the connection part forming the input of the first phase I / Z, then the connection part forming the output of the second phase O / Z + 1.
- the second set 37 complementary to said first set 36, then comprises in the following order: the connection part forming the input of the third phase I / Z + 2, then the connection part forming the output of the first phase O / Z, then the connection part forming the input of the second phase I / Z + l.
- the supply ends 33G, 34G are interconnected for example here by means of an interconnection trace 38.
- Each interconnection trace is for example soldered to the associated connection parts and may comprise a portion of connection with a module of the electronic assembly 26.
- the traces 38 are not, for example, overmolded in an electrically insulating material to facilitate the making of these connections and to guarantee good electrical insulation between them and between said traces and the vertices 30E, 31E, 32E of the other winding pins.
- connection part forming the phase input of the third phase I / Z + 2 is connected to the connection part forming the phase output of the second phase O / Z + 1
- connection part forming the phase output of the first phase O / Z is connected to the connection part forming the phase input of the second phase I / Z + 1
- connection part forming the phase output of the third phase O / Z + 3 is connected to the connection part forming the phase input of the first phase I / Z.
- a holding member 39 can be arranged between said ends and thus prevent said ends from moving in particular in a radial direction towards the end. outward or inward with respect to the X axis.
- the retainer 39 therefore maintains two feed ends which are arranged in the same notch and on different edge layers, each of the layers forming a radial end of the coil.
- the retaining member 39 is mounted in contact with the axial end of the rear chignon 25a which extends axially in the direction of the electronic assembly 26.
- a radial face of the retaining member 39 serving as the surface of 'support is therefore in contact with at least one vertex 30E, 31E, 32E of one of the pins 30, 31, 32.
- the holding member could be mounted at a distance from the bun and therefore not be in contact with him.
- the electrical winding 24 comprises only two power supply ends not having a crossing part, the winding then comprises a single holding member 39.
- the coil could then include two retaining members 39, one for each pair of ends.
- the holding member may include a first part 40 making it possible to hold the feed end 33G of the first feed pin 33, a second part 41 making it possible to hold the feed end 34G of the second feed pin.
- food 34 and part of connection 42 arranged between said parts 40, 41.
- the connection part is arranged radially between said two parts.
- FIG. 12 illustrates an example of a retaining member 39 which has the shape of a bar comprising two axially through holes 43 each allowing the insertion of one of the supply ends 33G, 34G.
- the retaining member 39 could be in the form of a bar comprising two notches each allowing the insertion, in particular by snap-fastening, of the supply ends 33G, 34G.
- the retainer 39 is formed from an electrically insulating material such as plastic.
- the retaining member can be formed in one piece, that is to say that the first part 40, the second part 41 and the connecting part 42 are made from one piece together to form a single piece.
- Figure 9 a schematic illustration of a coil part in accordance with what has been described above.
- the number of notches has been limited, it being understood that what follows can be extended without difficulty by those skilled in the art to achieve the complete winding, the other notches of the stator also comprising stacks of conductive segments.
- the pins of the same phase are shown in bold, the pins of the other phases being shown in transparency.
- the current is introduced, in a first direction of orientation, into the coil 24 via the supply end 34G of a first supply pin 34 forming the input of the electric current of the illustrated sentence on the side of the first axial end face 29a.
- the current flows, in stacked conductive segments, in the same direction for a given notch, and in an opposite direction for a notch spaced apart by one step. P or -P.
- Notch E + P is moved away from notch E by a predetermined pitch P, according to a first sense of orientation.
- the pitch P corresponds to the interposition of five notches between a notch E and a notch E + P.
- This conductive segment 34A arranged so as to form part of the fourth layer C4 in this notch E, has at its free end 34F, on the side of the second axial end face 29b, a shape folded back on itself similar to that of a conductive segment 30F of a conductive pin 30 of the first group of pins that it replaces in this layer.
- the free end 34F of the supply pin is connected, at the level of the second axial end face 29b of the stator, to the free end 31F of a conductive pin 31 of the second group of pins, one of the conductive segments of which occupies the third layer C3 in an EP notch.
- the two free ends 34F, 31F are arranged Moon next to P other, in particular in a direction radial and are electrically connected at a contact point 35, this contact point being able to be produced by welding, so as to allow the flow of an electric current through the conductive segments, in the same direction, in each notch .
- the direction of current flow is represented by the arrows overlapping the conductive pins. As a result, the current is caused to flow, from the second axial end face 29b to the first axial end face 29a, via the conductive segment 31B in the third layer C3 of the notch EP, as illustrated. by arrow F2.
- the conductive segment 31B occupying the third layer C3 in the notch EP, forms part of a conductive pin 31 belonging to the second group of pins so that this conductive segment is extended, at the level of the first axial end face 29a, by P intermediate an angled junction 31C, in a conductive segment 31 A occupying the first layer C1 in a notch E-2P separated by a space P with respect to the notch EP, in the opposite direction to the first direction orientation.
- the current is caused to flow, from the first axial end face 29a to the second axial end face 29b, via the conductive segment 31A in the first layer C1 of the notch E-2P, as illustrated. by arrow F4.
- the winding continuity is achieved by connecting P free end 31F of the conductive segment 31A occupying the first layer C1 in the slot E + 2P, to the free end 30F of a conductive segment 30A occupying the second layer C2 in the slot E + P, said ends 31F, 30F being arranged side by side in a radial direction and electrically connected by a contact point 35 at the second axial end face 29a.
- the current is then caused to loop in the first direction of orientation and to flow from the second axial end face 29b to the first axial end face 29a, in the second layer C2 of the E + P slot via the conductive segment 30A of a conductive pin 30 of the first group of pins, as illustrated by the arrow F3, then to circulate in the bent junction 30C of said conductive pin 30 then to circulate from the first axial end face 29a towards the second axial end face 29b, in the fourth layer C4 of the slot E + 2P via the conductive segment 30B of the said conductive pin 30. It can be seen from the above that in the slot E + 2P, the currents flowing in the first layer C1 and in the fourth layer C4 both flow in the same direction.
- the current then flows successively in a direction opposite to the first direction of orientation, via a point of contact 35, to a conductive segment 31B housed in the third layer C3 of the slot.
- E + P then via the bent junction 31C to a conductive segment 31 A of the same conductive pin 31 in the first layer C1 of the notch E.
- the current is caused to flow following a point of contact 35, from the second axial end face 29b towards the first axial end face 29a in the first direction of orientation, in the second layer C2 of the notch E via a conductive segment 32A of the connection pin 32 then, following the bent junction 32C, from the first axial end face 29a to the second axial end face 29b, in the third layer C3 of the notch E + P via a conductive segment 32B of said connecting pin 32.
- the continuity of the winding is then achieved, in accordance with what has just been described, by passing from a conductive segment of the first layer C1 to the third layer C3 and from the fourth layer C4 to the second layer C2 on the side of the junctions. elbows forming part of the conductive pins, and passing from the second layer C2 to the first layer C1 and from the third layer C3 to the fourth layer C4 by contact points 35, in particular welds, at the second face of axial end 29b, so that the flow of current in the same direction in each notch is achieved.
- the current is then caused to flow in accordance with what has been described above, from one conductive pin to another, until it flows in the notch EP at the level of the first layer C1 in which the conductive segment 33A is arranged. of the supply pin 33 forming via its supply end 33G the current output of the illustrated phase.
- the present invention finds applications in particular in the field of alternators, alternator-starters, electric motors or even reversible machines, but it could also be applied to any type of rotating machine.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Windings For Motors And Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1910985A FR3101736B1 (fr) | 2019-10-04 | 2019-10-04 | Bobinage électrique pour une machine électrique tournante |
| PCT/EP2020/077564 WO2021064122A1 (fr) | 2019-10-04 | 2020-10-01 | Bobinage électrique pour une machine électrique tournante |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4038728A1 true EP4038728A1 (fr) | 2022-08-10 |
Family
ID=69743309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20780238.0A Pending EP4038728A1 (fr) | 2019-10-04 | 2020-10-01 | Bobinage électrique pour une machine électrique tournante |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20220255390A1 (fr) |
| EP (1) | EP4038728A1 (fr) |
| JP (1) | JP7479460B2 (fr) |
| KR (1) | KR102820203B1 (fr) |
| CN (1) | CN114503398B (fr) |
| FR (1) | FR3101736B1 (fr) |
| WO (1) | WO2021064122A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11909285B2 (en) | 2021-11-30 | 2024-02-20 | Ford Global Technologies, Llc | Hairpin winding electric machine |
| US12341389B2 (en) | 2021-11-30 | 2025-06-24 | Ford Global Technologies, Llc | Hairpin winding electric machine |
| DE102021006172A1 (de) * | 2021-12-14 | 2023-06-15 | ENGIRO GmbH | Stator für eine rotierende Drehfeldmaschine |
| US11949305B2 (en) * | 2022-01-24 | 2024-04-02 | Ford Global Technologies, Llc | Parallel path hairpin winding connection with the lead terminals and neutral terminal bridges on the crown side |
| DE102023203099A1 (de) * | 2023-04-04 | 2024-10-10 | Zf Friedrichshafen Ag | Kompakte Hairpin-Wicklung |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69827195T2 (de) * | 1997-05-26 | 2006-03-09 | Denso Corp., Kariya | Wicklungsanordnung eines Ständers eines Wechselstromgenerators für Fahrzeuge |
| WO1998054822A1 (fr) * | 1997-05-26 | 1998-12-03 | Denso Corporation | Alternateur pour vehicule |
| EP1109290B1 (fr) * | 1999-12-14 | 2005-03-02 | Mitsubishi Denki Kabushiki Kaisha | Enroulements du stator d'un alternateur |
| JP4496651B2 (ja) * | 2001-01-19 | 2010-07-07 | 株式会社デンソー | 車両用交流発電機 |
| JP4046270B2 (ja) * | 2002-05-24 | 2008-02-13 | 三菱電機株式会社 | 回転電機の固定子 |
| JP4131478B2 (ja) * | 2006-05-24 | 2008-08-13 | 三菱電機株式会社 | 回転電機の巻線端部成形装置および成形方法 |
| US8686610B2 (en) * | 2008-07-01 | 2014-04-01 | Mitsubishi Electric Corporation | Automotive dynamoelectric stator |
| JP5704394B2 (ja) * | 2010-03-31 | 2015-04-22 | 株式会社デンソー | 回転電機の固定子 |
| WO2015072285A1 (fr) * | 2013-11-12 | 2015-05-21 | 日立オートモティブシステムズ株式会社 | Stator et machine électrique rotative équipée du stator |
| JP6566262B2 (ja) * | 2016-03-17 | 2019-08-28 | 株式会社デンソー | 回転電機の固定子 |
| DE102016226264A1 (de) * | 2016-12-28 | 2018-06-28 | Robert Bosch Gmbh | Stator einer elektrischen Maschine |
| CN109586466B (zh) * | 2017-09-29 | 2021-09-21 | 比亚迪股份有限公司 | 定子组件和具有其的电机和车辆 |
-
2019
- 2019-10-04 FR FR1910985A patent/FR3101736B1/fr active Active
-
2020
- 2020-10-01 CN CN202080069239.8A patent/CN114503398B/zh active Active
- 2020-10-01 US US17/765,747 patent/US20220255390A1/en not_active Abandoned
- 2020-10-01 WO PCT/EP2020/077564 patent/WO2021064122A1/fr not_active Ceased
- 2020-10-01 KR KR1020227010924A patent/KR102820203B1/ko active Active
- 2020-10-01 EP EP20780238.0A patent/EP4038728A1/fr active Pending
- 2020-10-01 JP JP2022520623A patent/JP7479460B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220069953A (ko) | 2022-05-27 |
| FR3101736B1 (fr) | 2021-10-15 |
| CN114503398A (zh) | 2022-05-13 |
| JP7479460B2 (ja) | 2024-05-08 |
| FR3101736A1 (fr) | 2021-04-09 |
| CN114503398B (zh) | 2025-02-14 |
| US20220255390A1 (en) | 2022-08-11 |
| JP2022552650A (ja) | 2022-12-19 |
| KR102820203B1 (ko) | 2025-06-12 |
| WO2021064122A1 (fr) | 2021-04-08 |
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