CN219740067U - First insulating framework, stator assembly and motor - Google Patents

Abstract

The utility model provides a first insulating framework, a stator assembly and a motor, wherein the first insulating framework is provided with a first side wall close to the peripheral wall of a stator core, a wire passing groove is formed in the first side wall, two groups of limiting structures are further arranged on the first side wall and are respectively positioned on two sides of the wire passing groove, each group of limiting structures comprises a first boss, a second boss and a third boss which are sequentially and alternately distributed, and the three bosses are distributed on the first side wall in a staggered manner along the axial direction and the circumferential direction of the stator core. According to the utility model, by enabling the bosses on the two sides of the wire passing groove to be distributed on the first side wall in a staggered manner, the effective control range of the dispersed bosses is enlarged, and particularly, the distance between the two bosses for limiting the wire inlet and outlet of the same phase winding is enlarged, so that the point location distribution for limiting the wire inlet and outlet of the three phase winding is more reasonable, and the limiting effect is better.

Description

First insulating framework, stator assembly and motor

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a first insulating framework, a stator assembly and a motor.

Background

At present, the separated insulating framework is widely applied, and compared with the traditional integral insulating framework, each independent module of the separated insulating framework can be independently wound, so that the slot filling rate and winding efficiency of the motor are greatly improved. The winding arrangement modes of the separated type and the integral type insulating frameworks are the same, three-phase windings are required to be separated during winding, the windings are not crossed, certain interphase insulation is guaranteed, ignition short circuit caused by the fact that enameled wires are damaged is prevented, and motor manufacturing quality is improved. The split insulating frame generally includes a first insulating frame and a second insulating frame inserted on the poles from both axial ends of the stator core. The first insulating framework is provided with a wire passing groove for winding wire inlet and outlet, three bosses which are distributed at intervals up and down are arranged on two sides of the wire passing groove, and the three bosses limit and comb the wire inlet and outlet of the three-phase winding respectively so as to prevent the wire inlet and outlet of the three-phase winding from going up and down, thereby driving the winding to move or leading to the intersection between three phase wires. However, in the axial direction of the stator core, three bosses are distributed on the first insulating skeleton side by side, and the three bosses side by side are next to the wire passing groove (as shown in fig. 11), so that the span between two bosses of the same phase is smaller, and a longer-distance wire on two adjacent first insulating skeletons is not limited, and the limiting effect of each boss on the wire inlet and outlet of the three-phase winding is poor.

Disclosure of Invention

Therefore, the utility model provides the first insulating framework, which can solve the problem that the limiting effect of each boss on the inlet and outlet wires of the three-phase winding is poor due to the fact that the position design of each boss on the existing first insulating framework is not reasonable enough.

In order to solve the problems, the utility model provides a first insulating framework, which is used for being assembled on a stator core, wherein the first insulating framework is provided with a first side wall close to the outer peripheral wall of the stator core, a wire passing groove for winding wire inlet and outlet is formed in the first side wall, two groups of limiting structures are further arranged on the first side wall, the two groups of limiting structures are respectively positioned on two sides of the wire passing groove, each group of limiting structures comprises a first boss, a second boss and a third boss which are sequentially and alternately distributed, and the first boss, the second boss and the third boss are staggered on the first side wall along the axial direction and the circumferential direction of the stator core.

In some embodiments, the plane where any cross section of the stator core is located is a reference plane, the vertical projections of the first boss, the second boss and the third boss in the reference plane are respectively a first projection, a second projection and a third projection, a first side and a second side opposite to each other are arranged between the first projection and the second projection, a first included angle a1 is formed between the first side and the second side, a third side and a fourth side opposite to each other are arranged between the second projection and the third projection, and a second included angle a2 is formed between the third side and the fourth side, wherein a1=a2.

In some embodiments, in the circumferential direction of the stator core, two opposite inner walls of the wire passing groove are each configured with a groove group, and the groove group includes a first wire clamping groove, a second wire clamping groove and a third wire clamping groove which are sequentially distributed at intervals.

In some embodiments, the first slot corresponds to a height position of a first boss on the first side wall, the second slot corresponds to a height position of a second boss on the first side wall, and the third slot corresponds to a height position of a third boss on the first side wall in an axial direction of the stator core.

In some embodiments, in the axial direction of the stator core, the height of the first side wall is h, and the slot widths of the first slot, the second slot and the third slot are the same and h1, and 0.15h is less than or equal to h1 is less than or equal to 0.2h.

In some embodiments, the diameter of the wire used to form the winding is phi, the first boss has a first bottom surface, the second boss has a second bottom surface, the third boss has a third bottom surface, the first slot has a first inner wall, the second slot has a second inner wall, the third slot has a third inner wall, the vertical distance between the first bottom surface and the first inner wall, the vertical distance between the second bottom surface and the second inner wall, the vertical distance between the third bottom surface and the third inner wall are equal, and d is 0.ltoreq.d.ltoreq.phi.

In some embodiments, the first boss, the second boss and the third boss have the same height and h2, and 0.5h1.ltoreq.h2.ltoreq.1.5h1-phi.

In some embodiments, the groove depths of the first, second and third wire clamping grooves are the same, and the groove width of the wire passing groove is the same as the groove depth of the third wire clamping groove and is w, and w is more than or equal to 1.43 phi and less than or equal to 2.14 phi.

The utility model also provides a stator assembly comprising the first insulating framework.

In some embodiments, a second insulating framework is further assembled on the stator core, the first insulating framework is opposite to the second insulating framework along the axial direction of the stator core, the second insulating framework is provided with a second side wall close to the outer peripheral wall of the stator core, an operation groove is formed in the second side wall, a binding wire buckle connected with the second side wall is arranged in the operation groove, the height of the second side wall is h3 along the axial direction of the stator core, and the groove depth of the operation groove is h4, and 0.33h3 is less than or equal to h4 and less than or equal to 0.5h3; the width of the second side wall is w1, and the groove width of the operation groove is w2, and w2 is more than or equal to 0.196w1 and less than or equal to 0.262w1.

In some embodiments, the diameter of the wire used to form the winding is phi, the binding-wire buckle comprises a wire clamping part, the wire clamping part is positioned in the operation groove, the width of the wire clamping part is w3, the height of the wire clamping part is h5, w2-5 phi is less than or equal to w3 and less than or equal to w2-3 phi, and 0.33h4 is less than or equal to h5 and less than or equal to 0.5h4.

In some embodiments, the binding-wire buckle further comprises a binding-wire portion, the clip wire portion is connected with the second side wall through the binding-wire portion, and the width w4 of the binding-wire portion is 0.3w3.ltoreq.w4.ltoreq.0.5w3.

The utility model also provides a motor comprising the stator assembly.

The utility model provides a first insulating framework, a stator assembly and a motor, wherein bosses on two sides of a wire passing groove are distributed on the first side wall of the first insulating framework in a staggered manner, so that the effective control range of each scattered boss is enlarged, and particularly the span between two bosses for limiting the wire inlet and outlet of the same phase winding is enlarged, so that wires which cannot have a longer distance on two adjacent first insulating frameworks are not limited, namely the point location distribution for limiting the wire inlet and outlet of a three-phase winding is more reasonable, and the limiting effect is better.

Drawings

FIG. 1 is an exploded view of a stator assembly according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a stator assembly according to an embodiment of the present utility model;

FIG. 3 is a side view of a first insulating skeleton of a stator assembly according to an embodiment of the present utility model;

FIG. 4 is a top view of a first insulating skeleton of a stator assembly according to an embodiment of the present utility model;

FIG. 5 is a front view of a first insulating skeleton of a stator assembly according to an embodiment of the present utility model;

FIG. 6 is a front view of a second insulating skeleton of a stator assembly according to an embodiment of the present utility model;

FIG. 7 is a side view of a second insulating skeleton of a stator assembly in accordance with an embodiment of the present utility model;

FIG. 8 is a front view of a second insulating skeleton of a stator assembly in accordance with an embodiment of the present utility model;

fig. 9 is a side view of a pole of a stator core of a stator assembly according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of an inlet and outlet wire of one of the three phase windings of a stator assembly according to an embodiment of the present utility model routed on a first insulating frame;

FIG. 11 is a front view of a first insulating skeleton of a prior art stator assembly;

FIG. 12 is a thickness comparison of a slot insulation structure of a stator assembly according to an embodiment of the present utility model and a prior art stator assembly;

fig. 13 is a graph comparing effective slot area of an electric machine according to an embodiment of the present utility model with a prior art electric machine.

The reference numerals are expressed as:

1. a stator core; 2. a first insulating skeleton; 3. a second insulating skeleton; 4. a pole; 5. wire passing grooves; 6. a first boss; 7. a second boss; 8. a third boss; 9. a first wire clamping groove; 10. a second wire clamping groove; 11. a third wire clamping groove; 12. an operation groove; 13. binding wire buckle; 131. a wire clamping part; 132. binding wire part; 14. a connection structure; 15. a clamping groove.

Detailed Description

Referring now to fig. 1 to 13 in combination, there is provided a stator assembly according to an embodiment of the present utility model, including: stator core 1 and first insulating skeleton 2, stator core 1 has utmost point post 4, first insulating skeleton 2 assembles on utmost point post 4, first insulating skeleton 2 has the first lateral wall that is close to stator core 1 periphery wall, it is used for winding inlet wire and wire groove 5 of leading out to construct on the first lateral wall, still be provided with two sets of limit structure on the first lateral wall, and two sets of limit structure are in the both sides of wire groove 5 respectively, every limit structure of group all includes first boss 6 of interval distribution in proper order, second boss 7 and third boss 8, along stator core 1's axial and circumference direction, first boss 6, second boss 7 and third boss 8 dislocation distribution on first lateral wall. In this technical scheme, through making each boss of wire casing 5 both sides all misplaced distribution on the first lateral wall of first insulating skeleton 2, then the effective control range increase of each boss after the dispersion, especially the distance increase between two bosss that go on spacing to the business turn over line of same looks winding for can not have longer one section distance's wire not by spacing on two adjacent first insulating skeleton 2 anymore, also carry out spacing point position distribution to the business turn over line of three-phase winding more reasonable promptly, make spacing effect better. The wire passing groove 5 is located on the center line of the first side wall and is close to the pole 4 where the winding is needed, so that the winding path can be effectively reduced.

Referring to fig. 4, the plane where any cross section of the stator core 1 is located is taken as a reference plane, vertical projections of the first boss 6, the second boss 7 and the third boss 8 in the reference plane are respectively a first projection, a second projection and a third projection, opposite first edges and second edges are formed between the first projection and the second projection, a first included angle a1 is formed between the first edges and the second edges, opposite third edges and fourth edges are formed between the second projection and the third projection, and a second included angle a2 is formed between the third edges and the fourth edges, wherein a1=a2. Therefore, the bosses on the two sides of the wire passing groove 5 are uniformly distributed, which is beneficial to distinguishing and planning the wire inlet and outlet of different phase windings, so that the wire inlet and outlet of the three-phase windings are distributed more orderly, and the boss drawing process is convenient to implement. Further, the first lateral wall is the arc wall, and the one side that first boss 6, second boss 7 and third boss 8 deviate from the first lateral wall is first arcwall face, and first arcwall face is the same with the camber of first lateral wall.

Referring to fig. 11 in combination, only the wire passing groove 5 is formed on the first insulating frame 2 in the prior art, and when the inlet and outlet wires of the three-phase winding enter and exit the wire passing groove 5, the positions of the inlet and outlet wires in the wire passing groove 5 are not limited, and the inlet and outlet wires can go up and down, which is most likely to cause the inlet and outlet wires to cross in the wire passing groove 5. In view of this, the present utility model is configured with groove groups on two opposite inner walls of the wire passing groove 5, the groove groups including a first wire clamping groove 9, a second wire clamping groove 10 and a third wire clamping groove 11 which are sequentially and alternately distributed, as shown in fig. 1. The three wire clamping grooves can limit the inlet and outlet wires of the three-phase winding, so that the inlet and outlet wires are respectively limited at different heights, and the cross between the inlet and outlet wires is prevented.

As shown in fig. 1, 5 and 10, in the axial direction of the stator core 1, the first slot 9 corresponds to the height position of the first boss 6 on the first side wall, the second slot 10 corresponds to the height position of the second boss 7 on the first side wall, and the third slot 11 corresponds to the height position of the third boss 8 on the first side wall, so that the inlet and outlet wires of the three-phase winding are simultaneously constrained by the slot and the boss at the same height position, and the height position of the inlet and outlet wires of the three-phase winding in the process of crossing wires is firmer.

Referring to fig. 5, the height of the first side wall is h, the slot widths of the first slot 9, the second slot 10 and the third slot 11 are the same and h1, and when h is less than or equal to 10mm and less than or equal to 15mm, the effect of the slot structure on the structural strength of the first insulating frame 2 is greater, preferably, 0.15h is less than or equal to 0.2h.

Referring to fig. 5 in combination, the diameter of the wire for forming the winding is Φ, the first boss 6 has a first bottom surface, the second boss 7 has a second bottom surface, the third boss 8 has a third bottom surface, the first slot 9 has a first inner wall, the second slot 10 has a second inner wall, the third slot 11 has a third inner wall, the vertical distance between the first bottom surface and the first inner wall, the vertical distance between the second bottom surface and the second inner wall, the vertical distance between the third bottom surface and the third inner wall are equal, and d. When the distance between the bottom of the boss and the lowest part of the corresponding wire clamping groove is overlarge, the wire inlet and outlet of the winding can be loosened up and down in the wire crossing process, and when the bottom of the boss is lower than the lowest part of the wire clamping groove, the wire inlet and outlet of the winding needs to pass through a section of axial distance, so that the wire inlet and outlet path is relatively longer, the motor resistance is increased, the motor efficiency is reduced, and preferably, d is more than or equal to 0 and less than or equal to phi. Wherein the first inner wall of the first wire clamping groove 9 is flush with the bottom of the wire passing groove 5.

Referring to fig. 5, the heights of the first boss 6, the second boss 7 and the third boss 8 are the same and h2, after the bottom positions of the bosses are determined, the height h2 of the boss is still limited, preferably, 0.5h1.ltoreq.h2 is not more than 1.5h1-phi, so that the influence on the wire inlet and outlet of the previous phase winding when the boss is too high can be avoided, and the processing difficulty of parts is increased when the boss is too low.

Referring to FIG. 5, the first, second and third wire clamping grooves 9, 10, 11 have the same groove depth, and the width of the wire passing groove 5 is the same as the groove depth of the third wire clamping groove 11 and w, preferably, w is 1.43 phi less than or equal to 2.14 phi. The groove width of the wire passing groove 5 and the groove depth of each wire clamping groove can be limited, and the structural strength of the first insulating framework 2 is prevented from being reduced when the groove width and the groove depth are large; when the slot width and the slot depth are smaller, the windings are easy to rub with the slot walls so as to drop paint and wires, and then contact with other phase windings, thereby causing a short circuit phenomenon.

As shown in fig. 1, 2 and 8, the pole 4 is further provided with a second insulating frame 3, the first insulating frame 2 is opposite to the second insulating frame 3 along the axial direction of the stator core 1, the second insulating frame 3 has a second side wall close to the outer peripheral wall of the stator core 1, an operation slot 12 is configured on the second side wall, and a binding wire buckle 13 connected with the second side wall is arranged in the operation slot 12. The main function of the second insulating framework 3 is different from that of the first insulating framework 2, the first insulating framework 2 is required to complete the arrangement problem of the inlet wires and the outlet wires of the three-phase windings, and the second insulating framework 3 is only required to collect and fix the three-phase windings. When the winding of the three-phase winding is completed, in order to prevent the three-phase outgoing lines from affecting the winding arrangement of the first insulating frame 2, the three-phase outgoing lines need to be fixed on the binding wire buckle 13 of the second insulating frame 3. When the three-phase winding is fixed, insulating sleeves with different colors firstly insulate and distinguish each phase winding, then the three-phase winding is wound and summarized by the insulating wires, and finally the insulating wires are bound on the binding wire buckle 13 to finish the intersection and fixation of the three-phase winding lead-out wires. The binding-wire buckle 13 is equivalent to a binding-wire positioning column in a traditional insulating framework, and the lead-out wire is fixed on the binding-wire buckle 13, so that the rotor can be prevented from scraping the stator lead-out wire when rotating at a high speed. The height of the second side wall is h3, the groove depth of the operation groove 12 is h4, and preferably, h4 is more than or equal to 0.33h3 and less than or equal to 0.5h3 along the axial direction of the stator core 1; the width of the second side wall is w1, and the groove width of the operation groove 12 is w2, preferably, 0.196w 1. Ltoreq.w2.ltoreq.0.262 w1. This makes it possible to limit the width and height of the operation groove 12, thereby enabling to meet the processing requirements and not to affect the structural strength of the second insulating frame 3. Further, the binding-wire buckle 13 is located on the center wire of the second side wall.

Referring to fig. 8 in combination, the binding-wire buckle 13 includes a clamping wire portion 131 and a binding wire portion 132, the clamping wire portion 131 is connected with the second side wall through the binding wire portion 132, the clamping wire portion 131 has a width w3, a height h5, and a width w4 of the binding wire portion 132. The lead wire is bound on the binding-wire portion 132, and the clip wire portion 131 limits the lead wire to prevent the lead wire from falling off the binding-wire portion 132. The binding wire 132 is easy to fall off when wide and break when narrow, resulting in unsuccessful binding wire; the width and the height of the wire clamping part 131 are smaller, so that effective limit cannot be formed on the bound outgoing wires, the bound outgoing wires are easy to fall off, when the width of the wire clamping part 131 is larger, the distance between the wire clamping part 131 and the inner wall of the operation groove 12 can be smaller than the diameter of a wire, the wire binding cannot be completed, preferably, w2-5 phi is less than or equal to w3 phi is less than or equal to w2-3 phi, and 0.33h4 is less than or equal to h5 and less than or equal to 0.5h4; w4 is more than or equal to 0.3w3 and less than or equal to 0.5w3.

Referring to fig. 2 and 9, a pair of engagement structures 14 are further disposed at one end of the second insulating frame 3 facing the first insulating frame 2, two clamping grooves 15 are respectively formed at two sides of the main body portion of the pole 4, when the first insulating frame 2 and the second insulating frame 3 are assembled on the pole 4, the two engagement structures 14 are respectively clamped into the two clamping grooves 15, and part of the first insulating frame 2 is overlapped on the two engagement structures 14, so that the wall thickness of the insulating frame can be effectively reduced, and the effective groove area of the motor is increased. Because the matching mode of the upper and lower insulating frameworks has lower requirements on the thickness of the slot insulating structure, the thickness of the slot insulating structure does not need to be increased so as to thin the end part to realize the matching of the upper and lower insulating frameworks, so that the slot insulating thickness of the stator core is reduced by 40 percent compared with that of the traditional insulating frameworks, as shown in fig. 12, and the effective slot area of the stator core is increased by 9.68 percent, as shown in fig. 13.

Fig. 10 shows a crossover path of a certain phase winding of a certain 9-slot 6-pole three-phase motor, in general, winding in-out line arrangement is sequentially performed from bottom to top, when the winding sequence is performed from phase C, the phase a boss is located at the top, when the winding sequence is performed from phase a, and the phase C boss is located at the top. Taking the winding of the phase A winding as an example, during winding, the phase A winding enters the wire clamping groove from one side according to the direction, the wire inlet position is fixed by the boss at the lowest layer, then the wire is wound on the tooth part, after the winding is completed, the wire is led out from the other wire clamping groove at the same height according to the same direction, the wire outlet position is fixed by the boss at the lowest layer at the other side, then the wire enters the corresponding tooth part of the phase A again through two identical insulating framework modules for winding until the phase A winding is completed, then the phase B winding is carried out, and so on. Because each independent skeleton has universality during winding, the winding direction can be clockwise or anticlockwise, the winding material is not limited, and the winding material can be copper wire material or aluminum wire.

According to an embodiment of the present utility model, there is also provided an electric machine including the above-described stator assembly.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (13)

1. The utility model provides a first insulation skeleton for assemble on stator core (1), its characterized in that, first insulation skeleton (2) have and be close to the first lateral wall of stator core (1) periphery, it is used for winding inlet wire and wire groove (5) of being qualified for next round of competitions to construct on the first lateral wall, still be provided with two sets of limit structure on the first lateral wall, and two sets of limit structure is in respectively cross the both sides of wire groove (5), every group limit structure all includes first boss (6), second boss (7) and third boss (8) of interval distribution in proper order, follow on the axial and the circumference direction of stator core (1), first boss (6), second boss (7) and third boss (8) are in dislocation distribution on the first lateral wall.

2. The first insulating framework according to claim 1, characterized in that a plane where any cross section of the stator core (1) is located is a reference plane, vertical projections of the first boss (6), the second boss (7) and the third boss (8) in the reference plane are respectively a first projection, a second projection and a third projection, opposite first edges and second edges are formed between the first projection and the second projection, a first included angle a1 is formed between the first edges and the second edges, opposite third edges and a fourth edge are formed between the second projection and the third projection, and a second included angle a2 is formed between the third edges and the fourth edges.

3. The first insulating skeleton according to claim 1, characterized in that, in the circumferential direction of the stator core (1), groove groups are formed on two opposite inner walls of the wire passing groove (5), and the groove groups comprise a first wire clamping groove (9), a second wire clamping groove (10) and a third wire clamping groove (11) which are distributed at intervals in sequence.

4. A first insulating skeleton according to claim 3, characterized in that the first card slot (9) corresponds to the height position of a first boss (6) on the first side wall in the axial direction of the stator core (1), the second card slot (10) corresponds to the height position of a second boss (7) on the first side wall, and the third card slot (11) corresponds to the height position of a third boss (8) on the first side wall.

5. A first insulating frame according to claim 3, wherein the height of the first side wall is h in the axial direction of the stator core (1), the slot widths of the first slot (9), the second slot (10) and the third slot (11) are the same and h1 is 0.15 h.ltoreq.h1.ltoreq.0.2 h.

6. The first insulating frame according to claim 5, characterized in that the diameter of the wire used to form the winding is Φ, the first boss (6) has a first bottom surface, the second boss (7) has a second bottom surface, the third boss (8) has a third bottom surface, the first card slot (9) has a first inner wall, the second card slot (10) has a second inner wall, the third card slot (11) has a third inner wall, the vertical distance between the first bottom surface and the first inner wall, the vertical distance between the second bottom surface and the second inner wall, the vertical distance between the third bottom surface and the third inner wall are equal, and d, 0-d- Φ.

7. The first insulating framework of claim 6, wherein the heights of the first boss (6), the second boss (7) and the third boss (8) are the same and h2, and h2 is more than or equal to 0.5h1 and less than or equal to 1.5h1-phi.

8. The first insulating framework according to claim 6, wherein the groove depths of the first clamping groove (9), the second clamping groove (10) and the third clamping groove (11) are the same, the groove widths of the wire passing grooves (5) and the third clamping groove (11) are the same, and w is 1.43 phi less than or equal to w less than or equal to 2.14 phi.

9. A stator assembly comprising the first insulating skeleton of any one of claims 1 to 8.

10. The stator assembly according to claim 9, characterized in that the stator core (1) is further provided with a second insulating framework (3), the first insulating framework (2) is opposite to the second insulating framework (3) along the axial direction of the stator core (1), the second insulating framework (3) is provided with a second side wall close to the outer peripheral wall of the stator core (1), an operation groove (12) is formed on the second side wall, a binding wire buckle (13) connected with the second side wall is arranged in the operation groove (12), the height of the second side wall is h3 along the axial direction of the stator core (1), and the groove depth of the operation groove (12) is h4,0.33h3 is less than or equal to h4 and less than or equal to 0.5h3; the width of the second side wall is w1, and the groove width of the operation groove (12) is w2, and w2 is more than or equal to 0.196w1 and less than or equal to 0.262w1.

11. The stator assembly according to claim 10, characterized in that the diameter of the wire used to form the winding is phi, the binding-wire clasp (13) comprises a wire-clamping portion (131), the wire-clamping portion (131) is located in the operation slot (12), the width of the wire-clamping portion (131) is w3, the height is h5, w2-5 phi +.w3 +.w2-3 phi, 0.33h4 +.h5 +.0.5h4.

12. The stator assembly according to claim 11, characterized in that the binding-wire clasp (13) further comprises a binding-wire portion (132), the clamping wire portion (131) being connected to the second side wall by the binding-wire portion (132), the binding-wire portion (132) having a width w4,0.3w3 ∈w4 ∈0.5w3.

13. An electric machine comprising a stator assembly as claimed in any one of claims 9 to 12.