Support for a stator coil of a rotary electric machine

Abstract

A support (4) for a stator coil (3) of a rotary electric machine (1), the support comprising: • a receiving portion (5) intended to successively receive a mounting template (10) and then a stator tooth (31), the receiving portion (5) passing through the support (4) in a given direction (8), • a main surface (6) intended to receive a winding (32) of an electrical wire, the winding being made around the given direction (8), and • a means (7) for reducing a force exerted by the winding (32) of electrical wire on the main surface (6) before, during or after a replacement of the mounting template (10) with the stator tooth (31) in the receiving portion (5) of the coil support (4).

Description

Description Title of the invention: Stator coil support for a rotating electric machine.

[0001] The invention relates to a stator coil support of a rotating electrical machine. The invention also relates to a stator equipped with coil supports according to the invention. The invention further relates to a vehicle equipped with such a stator.

[0002] Rotating electrical machines are highly efficient. However, the manufacturing process for such machines requires overcoming significant challenges. In particular, existing devices and methods for installing coils of electrical wire around a stator have drawbacks. Indeed, to be fast and efficient, winding the electrical wire around the stator teeth must be done by exerting significant tension on the electrical wire, which risks damaging the support on which the wire is wound in the short or medium term. In addition, the high tension of the electrical wire risks undoing the ends of the winding.

[0003] The purpose of the invention is to provide a stator coil support that overcomes the above drawbacks and improves stator coil supports known from the prior art. In particular, the invention makes it possible to produce a stator coil support that is simple and reliable and that limits the effects of the high tension of the electric wire on the coil support and improves the robustness of the wire coils arranged on a stator, while preserving the insulating properties of the support.

[0004] To this end, the invention relates to a stator coil support of a rotating electric machine, the support comprising: • a housing intended to successively receive a mounting template, then a stator tooth, the housing passing through the support in a given direction, • a main surface intended to receive a winding of an electric wire, the winding being carried out around the given direction, and • a means for reducing a force exerted by the electric wire winding on the main surface, before, during or after a replacement of the mounting jig by the stator tooth in the housing of the coil holder.

[0005] In one embodiment, the main surface is a continuous surface.

[0006] In one embodiment, the reduction means is disposed on a given face of the housing.

[0007] In one embodiment, a section of the housing along a plane perpendicular to the given direction is substantially trapezoidal in shape, and the given face is a larger base of the trapezoid.

[0008] In one embodiment, the reducing means comprises at least one slot extending in the first direction in a thickness of the support under the given face of the housing, so that, - when a force exerted on the main surface by the electric wire winding is less than a first threshold, F at least one slot creates a first free space in the thickness of the support, and - when a force exerted on the main surface by the electric wire winding is greater than the first threshold, the first free space created by F at least one slot is partially or totally reduced.

[0009] In one embodiment, F at least one slot is a slot centered on the given face or at least one lateral slot of the given face.

[0010] In one embodiment, the given face comprises a groove opening onto the housing, and a removable portion inserted into the groove, a depth of the groove being greater than a thickness of the removable portion, such that - when a force exerted on the main surface by the wire winding is less than a second threshold, there is a second free space between the removable part and a stator tooth or a mounting jig inserted into the housing, and - when a force exerted on the main surface by the electric wire winding is greater than the second threshold, the second free space between the removable part and a stator tooth or a mounting jig inserted into the housing is partially or totally reduced.

[0011] The invention further relates to an arrangement comprising a stator tooth and a coil holder according to the invention, the stator tooth being arranged in the housing of the coil holder.

[0012] In one embodiment, the given face of the housing of the coil support comprises a first locking device adapted to cooperate with a second locking device disposed on the stator tooth.

[0013] The invention relates to a method of mounting an arrangement according to the invention comprising: - a step of inserting a mounting template into the housing of the arrangement's coil holder, then - a step of winding an electric wire on the main surface of the coil holder of the arrangement, then - a step of replacing the mounting template with the stator tooth of the arrangement in the housing, then, optionally, - a step of locking the coil holder of the arrangement on the stator tooth of the arrangement.

[0014] Other details, features and advantages will become more clearly apparent upon reading the detailed description given below, for informational and non-limiting purposes, in relation to with the different examples of realization illustrated in the following figures:

[0015] [Fig.l] schematically represents a motor vehicle equipped with a stator coil support according to the invention.

[0016] [Fig.2] represents a stator tooth equipped with a coil support according to a first embodiment of the invention.

[0017] [Fig.3] shows a coil holder according to one embodiment of the invention.

[0018] [Fig.4] is a top view of a spool holder according to a first embodiment of the invention, a mounting jig being inserted into the spool holder.

[0019] [Fig.5] is a top view of a spool holder according to a second embodiment of the invention, a mounting jig being inserted into the spool holder.

[0020] [Fig.6] is a top view of a spool holder according to a third embodiment of the invention, a mounting jig being inserted into the spool holder.

[0021] [Fig.7] is a top view of a spool holder according to the first embodiment of the invention.

[0022] [Fig.8] is a perspective view of a spool holder according to the first embodiment of the invention.

[0023] [Fig.9] illustrates different steps of using a centered slot of a coil holder according to the first embodiment of the invention.

[0024] [Fig.10] is a top view of a reel holder according to the second embodiment of the invention.

[0025] [Fig.l 1] is a detailed top view of a side slot of a coil holder according to the second embodiment of the invention.

[0026] [Fig.12] is a perspective view of a coil holder according to the second embodiment of the invention.

[0027] [Fig.13] is a detailed perspective view of a side slot of a coil holder according to the second embodiment of the invention.

[0028] [Fig.14] illustrates different steps of using a side slot of a coil holder according to the second embodiment of the invention.

[0029] [Fig.15] is a first perspective view of a reel holder according to the third embodiment of the invention.

[0030] [Fig.16] is a second perspective view of a spool holder according to the third embodiment of the invention.

[0031] [Fig.17] is a first top view of a reel holder according to the third embodiment of the invention.

[0032] [Fig.18] is a second top view of a spool holder according to the third embodiment of the invention.

[0033] [Fig.19] illustrates different stages of using a removable part of a support coil according to the second embodiment of the invention.

[0034] [Fig.20] is a first illustration of a role of a side slot of a coil holder according to the second embodiment of the invention.

[0035] [Fig.21] is a second illustration of a role of a side slot of a coil holder according to the second embodiment of the invention.

[0036] [Fig.22] is a sectional view illustrating a step of locking a coil support according to the invention on a stator tooth.

[0037] [Fig.23] is a perspective view illustrating a step of locking a coil support according to the invention on a stator tooth.

[0038] An embodiment of a motor vehicle 100 is described below with reference to [Fig. 1]. The motor vehicle 100 may be an electric or hybrid motor vehicle. Also, the vehicle 100 may be a private vehicle, a utility vehicle or one dedicated to public transport.

[0039] The motor vehicle 100 is equipped with an electric motor 1, of the rotating electric machine type, comprising a rotor 2 and a stator 3.

[0040] Various embodiments of the electric motor 1 are conceivable, including an axial flux machine with a rolled stator, or an axial flux machine with separate stator teeth, or a radial flux machine with open stator slots, or a radial flux machine with open stator slots or with semi-open (radial and / or axial) stator slots. The invention can further be applied to rotor windings in a radial flux machine.

[0041] The stator 3 can be made of rolled steel and / or sintered soft magnetic composite material.

[0042] In the embodiment presented in this document, the stator 3 is crown-shaped and comprises a plurality of teeth 31. Each tooth 31 of the stator 3 here has the shape of an angular section of the crown. The shape of a tooth is therefore substantially trapezoidal.

[0043] Each tooth 31 of the stator is surrounded by a coil support 4 according to the invention. Each coil support 4 receives a winding 32 of conductive wire, and a current flow in the winding 32 generates an electromagnetic field.

[0044] In addition, the rotor 2 comprises permanent magnets, or magnetically conductive poles, and it is rotated under the action of the magnetic field generated by the flow of current in the windings 32.

[0045] In the remainder of the document, the term "coil support 4" designates a coil support according to the invention. [Fig. 2] illustrates a stator tooth equipped with a coil support 4 according to a first embodiment 41 of the invention.

[0046] A 4 spool holder includes: - a housing 5 intended to successively receive a mounting template 10, then a stator tooth 31, the housing 5 passing through the support 4 in a given direction 8, - a main surface 6 intended to receive a winding 32 of an electric wire, the winding 32 being carried out around the given direction 8, and - a means 7 for reducing a force exerted by the winding 32 of electric wire on the main surface 6, before, during or after a replacement of the mounting template 10 by the stator tooth 31 in the housing 5 of the coil support 4.

[0047] Three embodiments 41, 42, 43 of the coil support 4 are mainly described in this document. The three embodiments 41, 42, 43 differ from each other in particular by the embodiment of the means 7 for reducing a force exerted by the winding 32 of electric wire on the main surface 6.

[0048] In the embodiments described, the reduction means 7 is arranged on a given face 51 of the housing 5.

[0049] Optionally, the coil support 4 is made, in whole or in part, from a material making it possible to insulate the windings 32 from an electromagnetic field generated by the stator 3. Thus, advantageously the support can be insulating. In particular the main surface 6 is advantageously made from such a material. Said material can be - plastic, for example Polyphthalamide (PPA) or Polyphenylene sulfide (PPS), - plastic containing a magnetically and electrically non-conductive filler, in particular fiberglass and / or a mineral filler. These solutions can be combined with magnetically conductive load zones (e.g. including iron powder, fiber, mesh, etc.) and / or with magnetically conductive parts, such as soft magnetic composite (SMC) bars.

[0050] The main surface 6 is an outer surface of the coil support 4 on which a winding of electric wire 32 is carried out.

[0051] The main surface 6 is a very thin support which is placed in direct contact with the electric wire winding. In the remainder of the document, the main surface 6 may also be called insulator 6 or insulating surface 6.

[0052] The main surface 6 forms a first straight cylinder. In the described embodiments, the base of the first cylinder is substantially trapezoidal.

[0053] Likewise, the housing 5 is a hole whose shape is a second right cylinder. Advantageously, the generating line of the second right cylinder is parallel to the generating line of the first right cylinder.

[0054] In the described embodiments, the base of the second cylinder is substantially trapezoidal, so as to adapt to the shape of a tooth 31 of the stator 3. In addition, the face given face 51 of the housing 5 is a larger base of the trapezoid formed by the housing 5. In an alternative embodiment, the given face 51 of the housing 5 could be a smaller base of the trapezoid formed by the housing 5.

[0055] The housing 5 is intended to successively receive a mounting template 10, then a stator tooth 31. In other words, the housing 5 is an opening passing through the coil support 4, this opening being intended to contain: - a mounting template 10, during a step E2 of winding the electric wire around the main surface, and / or - both the mounting template 10 and a stator tooth 31, during a step E3 of transferring the coil support 4 onto the stator tooth 31, and / or - the stator tooth 31 alone, at the end of the transfer step E3, or during a step E4 of locking the coil support 4 on the stator tooth.

[0056] The mounting template 10 is a male part complementary to the housing 5 and substantially reproducing the shape of a stator tooth 31. It has deformation resistance characteristics capable of preventing damage or deformation of the coil support 4 during the winding steps E2 and E3 of transfer.

[0057] Each coil holder 4 is equipped with a reduction means 7, capable of reducing a force exerted by the winding 32 of electric wire on the main surface 6 during at least one step among the winding steps E2, E3 of transfer and E4 of locking.

[0058] Furthermore, as illustrated by figures 4 to 6, the geometry of the mounting template 10 is advantageously adapted to the geometry of the reduction means 7. In particular, a main face 11 of the mounting template 10, intended to be arranged against the given face 51 of the housing 5, comprises an arrangement 12, 13, 14 collaborating with the reduction means 7.

[0059] Furthermore, the given face 51 of the housing 5 may comprise a first locking device 9 capable of collaborating with a second locking device 33 arranged on a stator tooth 31 to prevent movement of the coil support 4 in the given direction 8. In an embodiment more specifically visible in [Fig. 3], the first locking device 9 is a projecting portion 9 produced on the given face 51 of the housing 5, capable of collaborating with a notch 33 arranged on the stator tooth 31.

[0060] When a first locking device 9 is arranged on the given face 51, the geometry of the mounting template 10 may be adapted, in particular to take advantage of the presence of the first locking device 9, as will be more particularly described for the third embodiment 41 of the coil support 4.

[0061] Figures 7 to 14 illustrate the first and second embodiments 41, 42 of a coil support 4, in which the coil support 4 is a single piece and the reduction means 7 is an arrangement made in the thickness of the support 4.

[0062] In the first and second embodiments 41, 42, the reduction means 7 comprises at least one slot 71, 72, 73 extending in the given direction 8 in a thickness of the support under the given face 51 of the housing 5, so that, - when a force exerted on the main surface 6 by the winding 32 of electric wire is less than a first threshold SI, the at least one slot 71, 72, 73 creates a first free space 11 in the thickness of the support, and - when a force exerted on the main surface 61 by the winding of electric wire is greater than the first threshold SI, the first free space 44 created by the at least one slot 71, 72, 73 is partially or totally reduced.

[0063] In the first and second embodiments presented 41, 42, the at least one slot 71, 72, 73 is a centered slot 71 on the given face 51 (called "centered slot 71" in the remainder of the document) or the at least one slot is a lateral slot 72, 73 of the given face 51 (called "lateral slot 72, 73" in the remainder of the document).

[0064] Figures 7-9 illustrate the first embodiment 41 of a spool holder in which the at least one slot is a centered slot 71.

[0065] The centered slot 71 is made on the given face 51 of the housing 5. As can be seen in [Fig.9], the centered slot 71 is intended to collaborate with an arrangement 12 of the mounting template 10 when winding electric wire around the coil support 4. Then the centered slot 71 is intended to remain free when the coil support 4 is arranged on a stator tooth 31.

[0066] In the embodiment presented, the arrangement 12 made on the template is an insert 12 intended to be placed in the centered slot 71 of the given face 51 of the housing 5. Thus, when inserting the mounting template 10 into the housing 5, the insert 12 fills the centered slot 71.

[0067] Figures 10 to 14 illustrate the second embodiment 42 in which the at least one slot corresponds to two side slots 72, 73.

[0068] The lateral slots 72, 73 are made on the given face 51 of the housing 5. As can be seen in [Fig. 14], a central zone 52 of the given face 51 is located between the lateral slots 72, 73. The central zone 52 is intended to collaborate with an arrangement 13 of the template 10, in particular a support element 13 made in the template 10, so as to preserve the free space created by the lateral slots during winding of electric wire around the coil support 4.

[0069] In the third embodiment 43 illustrated by figures 15 to 20, the given face comprises a groove 74 opening onto the housing, and a removable part 75 inserted into the groove 74, a depth of the groove 74 being greater than a thickness of the removable part 75, so that - when a force F2 exerted on the main surface 6 by the winding of electric wire is less than a second threshold S2, there is a free space between the removable part 75 and a tooth 31 or a template 10 inserted in the housing, and - when a force F2 exerted on the main surface 6 by the winding of electric wire is greater than the second threshold S2, the free space between the removable part and a tooth or a template inserted in the housing is partially or totally reduced.

[0070] The removable part 75 comprises an external face 754 intended to be oriented towards the main surface 6. The removable part further comprises an internal central face 752 extended on either side by two internal shoulders 753. The internal central face 752 and the shoulders 753 are intended to be oriented towards the housing 5.

[0071] The internal central face 752 can advantageously collaborate with an arrangement 14 of the template 10, in particular a support element 14 produced in the template 10, so as to preserve a free space between the internal shoulders 753 and the main face 11 of the template 10 during winding of electric wire around the coil support 4.

[0072] In the third embodiment 43 of the coil holder 4, a projecting portion 9 may be arranged on the inner central face 752 of the removable part. As illustrated in [Fig.22], the projecting portion 9 then advantageously plays a role in positioning the removable part 75 inside the groove 74, - on the one hand when a mounting template 10 is inserted into the housing 5, and - on the other hand when a stator tooth 31 is inserted into the housing 5, the stator tooth being equipped with a notch capable of collaborating with the projecting portion.

[0073] The invention further relates to a method of mounting a stator according to the invention, comprising: - a step El of inserting a mounting template 10 into the housing 5 of the coil support 4, then - a step E2 of winding an electric wire on the main surface 6 of the coil support 4, then - a step E3 of replacing the mounting template 10 with a stator tooth 31 in the housing 5, and optionally, - a step E4 of locking the coil support 4 on the tooth 31.

[0074] The step E1 of inserting a mounting template 10 into the housing 5 of the coil holder 4 is illustrated by figures 9, 14 and 19, - [Fig.9] illustrating a first mode of execution of step E1 for a coil support 4 according to the first embodiment 41, - [Fig.14] illustrating a second mode of execution of step E1 for a coil support 4 according to the second embodiment 42, - [Fig.19] illustrating a third mode of execution of step E1 for a coil support 4 according to the third embodiment 43,

[0075] In the first execution mode of step El, we use - a coil support 4 according to the first embodiment 41 of the invention, and - a mounting template 10 having an insert 12 intended to be placed in the centered slot 71 of the given face 51 of the housing 5.

[0076] In this way, when inserting the mounting template 10 into the housing 5, the insert 12 fills the centered slot 71.

[0077] In the second execution mode of step El, we use - a coil support 4 according to the second embodiment 42 of the invention, and - a mounting template 10 having a support element 13 intended to exert a force on the given face of the housing 5, in particular a force on a central zone 52 of the given face of the housing 5.

[0078] Thus, when inserting the mounting template 10 into the housing 5, the support element 18 is placed against the central area 52, thus protecting a space reserved for the side slots.

[0079] In the third execution mode of step El, we use - a coil support 4 according to the third embodiment 43 of the invention, and - a mounting template 10 having an arrangement 14, in particular a support element 14, intended to exert a force on the removable part of the coil support 4.

[0080] Step E1 thus makes it possible to establish collaboration between the coil support 4 and the mounting template 10, so as to protect the coil support 4 against deformation or alteration during step E2.

[0081] In step E2, an electric wire is wound onto the main surface 6 of the coil holder 4. For reasons of efficiency and speed of execution, the winding is carried out with a high winding tension. In other words, the mechanical tension of the electric wire wound around the main surface 6 generates a high pressure on the main surface 6.

[0082] As can be seen in [Fig.9], in step E2, the spool holder 4 according to the first embodiment 41 of the invention makes it possible to wind wire around the spool holder 4 while preserving the space of the centered slot 71, thanks to the insert 12 placed in the centered slot 71.

[0083] Similarly, [Fig. 14] illustrates the fact that, in step E2, the spool support 4 according to the second embodiment 42 of the invention makes it possible to wind wire around the spool support 4 while preserving the space of the lateral slots 72, 73. Indeed, the support element 13, which abuts on a central zone 52 of the given face 51 of the housing 5, preserves the space of the lateral slots 72, 73.

[0084] Similarly, [Fig.19] illustrates that, in step E2, the coil support 4 according to the third embodiment 43 of the invention makes it possible to wind wire around the spool support while preserving a free space between the internal shoulders 753 and the main face 11 of the template 10. In fact, the support element 14, which is in abutment on the internal central face 752 of the removable part 75, preserves said free space.

[0085] Then we move on to step E3 of replacing the mounting template 10 with the stator tooth 31 in the housing.

[0086] Step E3 can be implemented by first completely extracting the mounting jig 10 to release the housing 5 before inserting the stator tooth 31. Alternatively, the insertion of the stator tooth 31 can be done simultaneously with the extraction of the jig, as illustrated in [Fig. 22] showing a coil support 4 according to the third embodiment 43. The removable part 75 is first pressed against the mounting jig 10. Then the stator tooth 31 is inserted into the housing 5 and it pushes the jig 10 towards the top of the coil support 4. Gradually, the contact surface between the jig 10 and the removable part 75 decreases, and the contact surface between the stator tooth 31 and the coil support 4 increases, until the total extraction of the mounting jig 10.

[0087] Once the transfer of the coil support 4 onto the stator tooth 31 is carried out, then the reduction means advantageously allows a reduction in the force exerted by the winding 32 on the main surface 6, i.e. on the insulator 6.

[0088] In fact, thanks to the reduction means 7, the transfer of the coil support 4 onto the stator tooth 31 frees up a space which allows a slight release of the tension of the winding 32, so as to preserve the winding 32 and the insulator 6.

[0089] [Fig. 20] illustrates the effect of the reduction means 7, in particular the effect of the lateral slots 72, 73 made on the main face 51 of the housing 5 in the second embodiment of the invention.

[0090] During the winding step E2, the support element 13 of the mounting jig 10 exerts a force which counters the tension exerted by the electric wire during its winding under high tension on the main surface 6. The free space 44 of the slots 72, 73 is thus preserved.

[0091] Then, during step E3, the coil support is transferred onto a stator tooth 31. However, the volume occupied by the tooth 31 is substantially less than the volume occupied by the mounting template 10. The tension exerted by the winding 32 on the main surface 6 tends to reduce the free space 44, which reduces the tension of the winding 32 and thus preserves the main surface 6 and the coil support 4 in general.

[0092] The different embodiments 71, 72, 73, 74, 75 of the reduction means 7 aim to preserve a free space in the housing 5 during the winding step E2 so as to allow a release of the winding 32 in the step E3 of transfer of coil support 4 to stator tooth 31.

[0093] [Fig. 21] generically illustrates the effect of the reducing means 7. The housing 5 is slightly larger than a stator tooth 31. For example, a radial dimension 53 of the housing may be 0.1 millimeters larger than a radial dimension 34 of a stator tooth 31. An arrangement in the mounting jig 10 allows the wire winding 32 to be carried out while preserving a clearance corresponding to a difference between the radial dimension 53 of the housing 5 and the radial dimension of the tooth 31. When the mounting jig 10 is replaced by a stator tooth 31, then the tension exerted by the winding 32 on the main surface 6 tends to reduce the clearance 44, which decreases the tension of the winding 32 and thus preserves the main surface 6 and the coil support 4 generally.

[0094] In other words, the reduction means 7 gives a form of elasticity to the coil support 4. This elasticity is used to protect the main surface 6 and the winding 32 when installing the coil support 4 on a stator tooth 31. This elasticity also makes it possible to preserve the condition of the main surface 6 and the winding 32 in the longer term.

[0095] Then, optionally, we continue with step E4 of locking the coil support 4 on the tooth 31 illustrated by figures 21 and 22. The locking step is implemented thanks to a collaboration between - on the one hand, a first locking device 9 arranged on the reel support 4, in particular the removable part 75, and - on the other hand, a second locking device 33 arranged on the stator tooth 31.

[0096] In the embodiment illustrated by [Fig.22], the first locking device 9 is a projecting portion of the removable part 75, and the second locking device 33 is a notch 33 made in the stator tooth.

[0097] Thus, when the second device 33 of the stator tooth 31 is opposite the first device 9 of the coil support 4, the projecting part 9 is housed in the notch 33, which locks the position of the coil support 4 on the stator tooth 31.

[0098] Indeed, as illustrated by figures 22 and 23, the presence of the projecting portion 9 on the given face 51 creates a free space between the given face 51 and the mounting template 10. The mounting template 10 generates a thrust PI oriented from the template towards the given face 51, in particular towards the removable part 75 inserted in the groove 74. In this configuration, the removable part 75 is pushed to the bottom of the groove, and a first free space 76 is created between the shoulders 753 and the edges of the groove 742, 743.

[0099] Then a stator tooth 31 equipped with a notch 33 capable of collaborating with the projecting portion 9 arranged on the internal central face 752 of the housing 5 is inserted into the housing 5. the removable part 75. As long as the projecting part 9 has not reached the notch 33, the stator tooth generates a thrust P2 oriented from the tooth 31 towards the given face 51.

[0100] On the other hand, when the projecting portion 9 is housed in the notch 33, then the collaboration between the notch 33 and the projecting portion 9 allows the removable part 75 to move closer to the stator tooth 31, which creates a second free space 77 between the external face 754 of the removable part 75 and the bottom of the groove 740. The internal central face 752 of the removable part 75 is then in contact with the stator tooth 31, and exerts a thrust P3 directed from the winding towards the tooth 31. The position of the coil support 33 is thus locked, by the collaboration between the notch 33 and the projecting portion 9, and by the thrust P3.

[0101] Finally, the coil holder according to the invention has the function of optimizing the mounting processes of stator coils, the optimization relating to the quality of the conductive wire winding and the robustness of the insulating part. For this purpose, the invention makes it possible to reduce the force exerted by the electric wire winding on the main surface of the coil holder, i.e. on the insulator, before, during or after the installation of the coil holder on a stator tooth.

[0102] The proposed solution is simple to implement and allows for a more efficient winding process.

[0103] Due to the reduction in mechanical stresses on the insulation, the invention also makes it possible to reduce the dimensions of the insulation - and more specifically the thickness of the insulation. The electrical performance of the machine is thus improved.

[0104] The invention also makes it possible to optimize the creepage distance of the winding.

[0105] The invention is further applicable to electric motors for electric vehicles and in particular for hybrid electric vehicles, in particular to future electric and hybrid vehicles equipped with axial flux electric machines. The invention also applies to all electric machines requiring the implementation of a linear winding process. In addition, the invention can be applied to various devices using an electric motor, for example a crane, an elevator, an airplane, a motorcycle, a train, a wind turbine, etc.

Claims

Claims

1. Support (4) for a stator coil (3) of a rotating electric machine (1), the support comprising: • a housing (5) intended to successively receive a mounting template (10), then a stator tooth (31), the housing (5) passing through the support (4) in a given direction (8), • a main surface (6) intended to receive a winding (32) of an electric wire, the winding being carried out around the given direction (8), and • a means (7) for reducing a force exerted by the winding (32) of electric wire on the main surface (6), before, during or after a replacement of the mounting template (10) by the stator tooth (31) in the housing (5) of the coil support (4).

2. Stator coil support (4) according to the preceding claim, characterized in that the main surface (6) is a continuous surface.

3. Stator coil support according to one of the preceding claims, characterized in that the reduction means (7) is arranged on a given face (51) of the housing (5).

4. Stator coil support according to one of the preceding claims, characterized in that a section of the housing (5) along a plane perpendicular to the given direction (8) is substantially trapezoidal in shape, and in that the given face (51) is a larger base of the trapezoid.

5. Stator coil support according to one of the preceding claims, characterized in that the reduction means (7) comprises at least one slot (71, 72, 73) extending in the first direction in a thickness of the support under the given face (51) of the housing, so that, - when a force exerted on the main surface by the winding (32) of electric wire is less than a first threshold (SI), the at least one slot (71, 72, 73) creates a first free space (44) in the thickness of the support, and - when a force exerted on the main surface by the winding (32) of electric wire is greater than the first threshold (SI), the first free space (44) created by the at least one slot (71, 72, 73) is partially or totally reduced.

6. Stator coil support according to the preceding claim, characterized in that F at least one slot is a centered slot (71) on the given face (51) or at least one lateral slot (72, 73) of the given face (51).

7. Stator coil support according to one of claims 3 or 4, characterized in that the given face (51) comprises a groove (74) opening onto the housing (5), and a removable part (75) inserted into the groove (74), a depth of the groove being greater than a thickness of the removable part (75), so that - when a force exerted on the main surface (6) by the electric wire winding (32) is less than a second threshold (S2), there is a second free space (45) between the removable part (75) and a stator tooth (31) or a mounting jig (10) inserted in the housing (5), and - when a force exerted on the main surface (6) by the electric wire winding (32) is greater than the second threshold (S2), the second free space (45) between the removable part (75) and a stator tooth (31) or a mounting jig (10) inserted in the housing (5) is partially or totally reduced.

8. Arrangement (20) comprising a stator tooth (31) and a coil support (4) according to one of the preceding claims, characterized in that the stator tooth (31) is arranged in the housing (5) of the coil support (4).

9. Arrangement (20) according to the preceding claim, characterized in that the given face (51) of the housing (5) of the coil support (4) comprises a first locking device (9) capable of collaborating with a second locking device (33) arranged on the stator tooth (31).

10. Method for mounting an arrangement according to the preceding claim, characterized in that it comprises: a step (El) of inserting a mounting template (10) into the housing (5) of the coil support of the arrangement (20), then a step (E2) of winding an electric wire on the main surface (6) of the coil support (4) of the arrangement (20), then a step (E3) of replacing the mounting template (10) with the stator tooth (31) of the arrangement (20) in the housing (5), then, optionally, a step (E4) of locking the coil support (4) of the arrangement (20) on the stator tooth (31) of the arrangement

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