Lead frame, insulating framework, insulating framework assembly, motor stator and motor

Abstract

The utility model relates to a lead frame, an insulation framework, an insulation framework assembly, a motor stator and a motor. The lead frame comprises a winding guide structure and a first installation structure. The winding guide structure is arranged on the side surface of the lead frame and is used for guiding a winding path of a lead; the first mounting structure is arranged on the end face of the lead frame and is used for being detachably and fixedly connected with the insulating framework; when a winding path needs to be replaced, only different lead frames need to be provided, and the whole insulating framework does not need to be subjected to mold opening again, so that the production and material costs are reduced; and the slot filling rate can be ensured, and the influence on the performance of the motor is small.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a conductor frame, an insulating frame, an insulating frame component, a motor stator and a motor. Background Art

[0002] In order to improve the stability of winding and prevent confusion in routing, a wire groove can be provided on the surface of the insulating skeleton in the motor. However, only one wire groove can be provided on an insulating skeleton, which means that it can only correspond to one winding path. When the winding path needs to be changed, a new insulating skeleton mold needs to be re-opened, which is costly. Therefore, how to change different winding paths at a low cost is a difficult problem in the current production of insulating skeletons. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned related technologies, the purpose of the present application is to provide a wire rack, an insulating skeleton, a motor stator and a motor, aiming to solve the problem of high cost of re-issuing a new insulating skeleton mold when replacing the winding path of the wire in the motor.

[0004] A wire rack includes a winding guide structure and a first mounting structure;

[0005] The winding guide structure is arranged on the side of the wire rack and is used to guide the winding path of the wire;

[0006] The first mounting structure is arranged on the end surface of the lead frame and is used for being detachably fixedly connected to the insulating frame.

[0007] The wire rack uses the winding guide structure thereon to guide the winding path of the wire, and can be detachably fixed to the insulating frame; when the winding path needs to be changed, only a different wire rack needs to be provided, and there is no need to re-open the mold of the entire insulating frame, which reduces the production and material costs. In addition, the wire rack sets the first mounting structure and the winding guide structure on different surfaces, so that the two are arranged separately, which reduces the structural or strength requirements of the side of the wire rack, for example, there is no need to set the mounting structure on the side of the wire rack or consider the mounting strength; the design of the winding guide structure is more flexible, which is conducive to reducing the space occupied by the winding guide structure, thereby leaving more space for the wire, ensuring the slot fill rate, and having little impact on the performance of the motor.

[0008] Optionally, the winding guide structure includes a plurality of bar grids arranged at intervals; through slots are formed between adjacent bar grids, so that the wires are arranged based on the bar grids and the through slots.

[0009] Optionally, the lead frame includes a first winding guide structure and a second winding guide structure respectively arranged on two side surfaces of the lead frame.

[0010] Optionally, the first mounting structure includes a main body plate, and the main body plate is provided with a first buckle or a first slot for engaging and fixing with the insulating frame.

[0011] Optionally, the first mounting structure includes a main body plate, and a first adhesive layer is provided on the inner side of the main body plate, and the first adhesive layer is used to bond and fix the lead frame to the insulating frame.

[0012] Based on the same inventive concept, the present application further provides an insulating frame, the insulating frame comprising an end face and a side face; a second mounting structure is provided on the end face of the insulating frame, the second mounting structure is used to be detachably fixedly connected to the first mounting structure of the lead frame, so that the lead frame is mounted on the outer surface of the insulating frame; wherein the second mounting structure comprises at least one of the following:

[0013] A second card slot or a second card buckle;

[0014] Second adhesive layer.

[0015] The insulating frame is provided with a second mounting structure, which can detachably mount the lead frame on the outer surface of the insulating frame; when the winding path needs to be changed, only a different lead frame needs to be provided, and the entire insulating frame does not need to be re-molded, thereby reducing production and material costs. In addition, the second mounting structure is arranged on the end surface, which has little impact on the winding space, helps to ensure the slot fill rate, and has little impact on the performance of the motor.

[0016] Based on the same inventive concept, the present application also provides an insulating skeleton assembly, comprising an insulating skeleton and the above-mentioned lead frame, wherein the insulating skeleton comprises an end face and a side face;

[0017] The conductor is mounted on the outer surface of the insulating frame; the end surface of the insulating frame is fixedly connected to the first mounting structure of the conductor frame, and the winding guide structure of the conductor frame is located on the side surface of the insulating frame.

[0018] The insulating skeleton assembly is equipped with the lead frame. When the winding path needs to be changed, only a different lead frame needs to be provided, and the entire insulating skeleton does not need to be re-molded, thereby reducing production and material costs. In addition, the lead frame is installed and matched on the end surface of the insulating skeleton, which has little impact on the winding space, helps to ensure the slot fill rate, and has little impact on the performance of the motor.

[0019] Optionally, the insulating skeleton assembly includes two wire racks; an opening for inserting the insulating skeleton is provided at an end opposite to the end surface of the wire rack, so that the two wire racks can be inserted from both ends of the insulating skeleton respectively.

[0020] Based on the same inventive concept, the present application also provides a motor stator, including a stator core and the above-mentioned insulating frame assembly; the stator core includes a yoke portion and a tooth portion, and the insulating frame is arranged on the outer surface of the tooth portion.

[0021] The above-mentioned motor stator adopts the above-mentioned insulating skeleton assembly. When the winding path needs to be changed, only a different wire frame needs to be provided, and there is no need to re-mold the entire insulating skeleton, thereby reducing production and material costs; and the slot fill rate is high and the motor performance is good.

[0022] Based on the same inventive concept, the present application also provides a motor, which includes a rotor and the above-mentioned motor stator.

[0023] The winding path of the wire in the motor can be guided by the wire frame, the winding path is stable, and the slot fill rate is high. When the winding path needs to be changed, only a different wire frame needs to be provided, and there is no need to re-open the mold of the entire insulation frame, which is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a lead frame provided in an embodiment of the utility model;

[0025] Figure 2 A schematic structural diagram of a first frame of an insulating frame provided in an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the installation and disassembly of the insulating frame assembly and the stator core blocks provided in the embodiment of the utility model;

[0027] Figure 4 A schematic diagram of an insulating frame assembly provided in an embodiment of the utility model being installed on a stator core block;

[0028] Figure 5 for Figure 4 Schematic diagram of top view;

[0029] Figure 6 for Figure 5 Schematic diagram of the cross section along line AA;

[0030] Figure 7 A cross-sectional schematic diagram of an insulating skeleton assembly of another structure provided by an embodiment of the utility model installed on a stator core block;

[0031] Description of reference numerals:

[0032] 1- conductor frame; 11- winding guide structure; 111- bar grid; 112- through slot; 12- first mounting structure; 121- first slot; 122- first buckle; 123- main body plate; 13- opening; 2- insulating frame; 201- first frame; 202- second frame; 21- second mounting structure; 211- second buckle; 212- second slot; 22- accommodation space; 23- insertion opening; 3- stator core block; 31- part of yoke; 32- tooth portion; 100- insulating frame assembly. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] Example:

[0036] This embodiment provides a lead frame 1, which is used for winding a motor. Figures 1 to 7 The lead frame 1 includes a winding guide structure 11 and a first mounting structure 12 .

[0037] The winding guide structure 11 is a structure for guiding the winding path of the wire, and is arranged on the side of the wire frame 1. The wire is the wire of the motor winding. During the winding process of the motor, the winding path of the wire is guided by the winding guide structure 11, which can improve the accuracy and stability of the wire position. It can be understood that the specific structure of the winding guide structure 11 can be set according to needs to correspond to the required winding path.

[0038] The first mounting structure 12 is a structure arranged on the end surface of the conductor frame 1, which can fix the conductor frame 1 to the insulating frame 2. It should be noted that in the present application, the end surface of each structure (such as the conductor frame 1, the insulating frame 2) refers to the surface in the axial direction of the stator core after it is arranged on the stator core; the side surface of each structure refers to the surface extending along the axial direction of the stator core after it is arranged on the stator core. Figure 6 or Figure 7 In the figure, the upper and lower surfaces in the direction of the figure are end surfaces, and the left and right surfaces are side surfaces. The lead frame 1 in the present application has at least one end surface and one side surface.

[0039] The lead frame 1 in this embodiment can be detachably fixedly connected to the insulating frame 2. When the motor winding needs to change the wire path, only a different lead frame 1 is needed, and there is no need to re-open the mold of the entire insulating frame 2, which reduces the production and material costs. The winding guide structure 11 and the first mounting structure 12 of the lead frame 1 are respectively located on the side and end surface thereof. The structural design of the two has little interference, which is conducive to ensuring a higher slot fill rate and has little impact on the performance of the motor.

[0040] In order to have a higher slot fill rate, in some embodiments, the winding guide structure 11 includes a plurality of bar grids 111 arranged at intervals. Figure 1 As shown, through grooves 112 are formed between adjacent bar grids 111, so that the wires are arranged based on the bar grids 111 and the through grooves 112. The through grooves 112 mean that there is no physical structure between the adjacent bar grids 111, which can make more space for winding. The arrangement of the bar grids 111 and the through grooves 112 makes the overall volume of the winding guide structure 11 smaller, that is, it occupies less space, leaving more space for winding in the winding slot, so that it can have a higher slot fill rate. In practical applications, the winding path can be guided by controlling the direction and spacing of the bar grids 111 and the through grooves 112 therebetween; by using a wire rack 1 with different directions and spacing of the bar grids 111 and the through grooves 112 therebetween, it is possible to guide different winding paths.

[0041] In other embodiments, the winding guide structure 11 may not be formed with the through groove 112. For example, the winding guide structure 11 may be a plate-shaped structure with grooves formed thereon, and the winding path of the wire is guided by the grooves. Since there is no need to consider the space for arranging the installation structure and the strength requirement of the winding guide structure 11 is lower, the thickness of the plate-shaped winding guide structure 11 can be set to be smaller, and the volume of the winding guide structure 11 can also be reduced to ensure the slot fill rate.

[0042] It can be seen that since the first mounting structure 12 is disposed on the end surface of the lead frame 1, a non-substantial structure such as the through slot 112 can be formed without affecting the stability of the installation. In other embodiments, the winding guide structure 11 can also be formed in other forms. Since the winding guide structure 11 is less concerned with the requirements of the mounting structure, its design method is very flexible, which helps to achieve a higher slot fill rate.

[0043] In order to better cooperate with the insulating frame 2 and ensure the stability and accuracy of the wire guidance, the wire guide structure 11 on the wire frame 1 can be set to two. That is, the wire frame 1 can include a first wire guide structure 11 and a second wire guide structure 11, and the first wire guide structure 11 and the second wire guide structure 11 are respectively arranged on two sides of the wire frame 1. For example Figure 1As shown, in this example, the conductor frame 1 is U-shaped as a whole, and has winding guide structures 11 on both sides. Among them, an opening 13 is formed at the other end opposite to the first mounting structure 12, and the insulating skeleton 2 can be placed into the conductor frame 1 through the opening 13, so that the conductor frame 1 fits the outer surface of the insulating skeleton 2 (the surface on the side away from the stator core). The winding guide structures 11 arranged on both sides sandwich the insulating skeleton 2 in the middle, and can also help find the position during installation, assist in positioning, and ensure that the position of the wire is more accurate. Of course, in other embodiments, only one winding guide structure 11 may be provided on the conductor frame 1.

[0044] The first mounting structure 12 may include a structure such as a snap-fit ​​structure that needs to be fixed with the mounting structure (second mounting structure 21) on the insulating frame 2. For example, in some embodiments, the first mounting structure 12 may include a first snap-fitting groove 121 or a first snap-fitting buckle 122; correspondingly, the second mounting structure 21 on the insulating frame 2 may include a second snap-fitting buckle 211 that matches the first snap-fitting groove 121, or a second snap-fitting groove 212 that matches the first snap-fitting buckle 122. The first snap-fitting buckle 122 and the second snap-fitting buckle 211 may have a certain elasticity to facilitate snap-fitting and disassembly.

[0045] In other examples, the first mounting structure 12 and the second mounting structure 21 may also be in other forms, such as a threaded connection structure. The connection is achieved by mounting structures that can cooperate with each other, such as a snap-fit ​​structure, and its stability is higher. It should be noted that the serial numbers such as "first" and "second" in this application are only used to distinguish structures with similar names and do not represent other limitations.

[0046] The first mounting structure 12 may also be a structure that is fixed by bonding or other methods without setting an additional structure on the insulating frame 2. For example, the first mounting structure 12 includes a first bonding layer, and the first bonding layer may be a structure with bonding ability such as an adhesive layer set on the lead frame 1, which is used to fix the lead frame 1 to the insulating frame 2 by bonding. The first bonding layer or other methods do not require setting a matching structure at the end, and the compatibility is good, and it can be applied to most insulating frames 2.

[0047] In some embodiments, the first mounting structure 12 may include a main body plate 123, which is mainly used to provide an area for forming or setting structures such as buckles and slots, or to directly contact the insulating frame 2 to achieve a fixed connection. The main body plate 123 can be connected to the winding guide structure 11 to ensure that the winding guide structure 11 is stably arranged, thereby making the overall structure of the lead frame 1 relatively stable and having a certain strength.

[0048] The first buckle 122 or the first slot 121 or the first adhesive layer and other structures for achieving fixed connection can be arranged on the main plate 123. Among them, the first buckle 122 or the first adhesive layer can be arranged on the inner side of the main plate 123 (the side facing the insulation frame 2) to contact with the structure on the insulation frame 2.

[0049] exist Figures 1 to 6 In the example, the first mounting structure 12 includes a first card slot 121, and the second mounting structure 21 on the insulating frame 2 includes a second card buckle 211. The first card slot 121 is provided on the main body plate 123 and penetrates the thickness direction of the main body plate 123. The first card slot 121 penetrating the main body plate 123 can expose the second card buckle 211, which is more convenient for disassembly in some implementation processes. Figure 7 , and also illustrates a structure in which the first installation structure 12 includes a first buckle 122. The first buckle 122 is disposed on the inner side of the main body plate 123 and is matched and connected with the second buckle slot 212 on the insulating frame 2.

[0050] This embodiment also provides an insulating frame 2, such as Figure 2 As shown, the insulating frame 2 includes an end face and a side face. Corresponding to the first mounting structure 12 of the lead frame 1 in the above example, a second mounting structure 21 is provided on the end face of the insulating frame 2; the second mounting structure 21 is used to be detachably fixedly connected to the first mounting structure 12 of the lead frame 1, so that the lead frame 1 is mounted on the outer surface of the insulating frame 2.

[0051] Exemplarily, the second mounting structure 21 may include a snap-fit ​​structure. For example, the second mounting structure 21 may include a second snap-fitting groove 212 or a second snap-fitting buckle 211. The second mounting structure 21 may also be a structure that is fixedly connected by bonding or the like. For example, the second mounting structure 21 includes a second bonding layer. The second bonding layer may be a structure with bonding ability such as an adhesive layer disposed on the insulating frame 2, and is used to fix the lead frame 1 to the insulating frame 2 by bonding. When the second mounting structure 21 includes a second bonding layer, the first mounting structure 12 may include a first bonding layer. The first bonding layer may be disposed on the inner side of the main body plate 123, and the first bonding layer and the second bonding layer may be bonded and fixed to each other. The first mounting structure 12 may also not be provided with a first bonding layer, and the second bonding layer may be directly bonded and fixed to the main body plate 123.

[0052] In some embodiments, the insulating frame 2 can be divided into two parts: a first frame 201 and a second frame 202, wherein the first frame 201 and the second frame 202 can be relatively assembled. The first frame 201 and the second frame 202 can be completely the same or different.

[0053] like Figure 3As shown, the first frame 201 and the second frame 202 may have the same or substantially the same structure. This embodiment takes the first frame 201 as an example for description, and the second frame 202 will not be repeated. Figures 2 to 4 The first frame 201 has a receiving space 22 formed therein, and the receiving space 22 is used to receive the teeth 32 of the stator core. The first frame 201 includes two opposite ends, one of which has an insertion opening 23 connected to the receiving space 22. When the first frame 201 is mounted on the stator core, the teeth 32 of the stator core can enter the receiving space 22 through the insertion opening 23.

[0054] It should be noted that, for ease of understanding, the illustrations of the present application only illustrate a portion of the stator core, namely, a stator core block 3. The stator core can be composed of a plurality of stator core blocks 3 assembled in a circle, and a stator core block 3 includes a portion of a yoke 31 and at least one tooth 32. In other embodiments, the stator core can also be a full-circle structure, and the lead frame 1 of this embodiment can also be applicable.

[0055] If the insulating frame 2 is provided with a second mounting structure 21, the second mounting structure 21 can be provided on the outer side of the end opposite to the insertion opening 23 (the side away from the stator core). The structure of the first frame 201 and the second frame 202 can be U-shaped as a whole. When the first frame 201 and the second frame 202 are assembled, the insertion openings 23 of the two are opposite, and the respective accommodating spaces 22 respectively accommodate a part of the tooth portion 32 of the stator core.

[0056] The present embodiment also provides an insulating skeleton assembly 100, which includes an insulating skeleton 2 and the lead frame 1 of the above example. It should be noted that the insulating skeleton 2 used in the insulating skeleton assembly 100 can be the insulating skeleton 2 of the above example, that is, it can include a second mounting structure 21, which cooperates with the first mounting structure 12 to be fixedly connected to the lead frame 1. In some embodiments, the insulating skeleton assembly 100 can also use any other form of insulating skeleton 2, as long as the first mounting structure 12 of the lead frame 1 can achieve a fixed connection with the insulating skeleton 2, for example, the first mounting structure 12 includes a first adhesive layer, as long as the first adhesive layer can contact and bond with the insulating skeleton 2, the fixed connection can be completed. It can be seen that in some embodiments, the lead frame 1 of the present application can also be compatible with the traditional insulating skeleton 2.

[0057] The insulating skeleton assembly 100 of this embodiment can be provided with wires, and the winding path of the wires can be guided by the wire frame 1 to ensure the stability of the wire setting. When the winding path needs to be changed, the insulating skeleton 2 can be reused without replacement, and only the wire frame 1 needs to be replaced, which is highly flexible and low cost.

[0058] like Figures 4 to 7As shown, the conductor frame 1 is arranged on the outer surface of the insulating skeleton 2. Among them, the end surface of the insulating skeleton 2 is fixedly connected to the first mounting structure 12 of the conductor frame 1. When a second mounting structure 21 is provided on the end surface of the insulating skeleton 2, the second mounting structure 21 on the end surface of the insulating skeleton 2 cooperates with the first mounting structure 12 of the conductor frame 1 to achieve fixed connection. When the conductor frame 1 is arranged on the insulating skeleton 2, the winding guide structure 11 is on the side surface (i.e., the side surface) of the insulating skeleton 2. The wound wire will be arranged along the two end surfaces and two side surfaces of the insulating skeleton 2, and at least one of the two side surfaces where the wire is located has a winding guide structure 11.

[0059] In some embodiments, the insulating skeleton assembly 100 includes two lead frames 1. Figure 3 or Figure 4 As shown, an opening 13 for inserting the insulating frame 2 is provided at one end of the lead frame 1 opposite to the end face, and the openings 13 of the two lead frames 1 are opposite to each other, and are inserted from both ends of the insulating frame 2. In practical applications, the winding guide structures 11 of the two opposite lead frames 1 can be contacted and spliced ​​to ensure that the winding guide structures 11 cover the side of the insulating frame 2 as much as possible. In some examples, the winding guide structures 11 of the two opposite lead frames 1 may not be in contact with each other, and a certain interval is allowed, which has lower requirements on production precision and is conducive to reducing costs.

[0060] The present embodiment also provides a motor stator, which includes a stator core and an insulating skeleton assembly 100 of the above embodiment. The stator core includes a yoke and a tooth portion 32, and the insulating skeleton 2 is arranged on the outer surface of the tooth portion 32. The yoke can be an annular or quasi-annular structure, wherein there is a hollow inner circle area, and the rotor of the motor will be arranged in the inner circle area. One end of the tooth portion 32 is connected to the yoke, and each tooth portion 32 can be axially arranged on the inner side of the yoke. In the motor stator, there are multiple teeth 32, and a winding area is formed between two adjacent teeth 32, and the wire is wound around the tooth portion 32 and accommodated in the winding area. The yoke and tooth portion 32 of the motor stator in this embodiment can be a full-circle formed structure, or can be composed of a plurality of stator core blocks 3 spliced ​​together. Since the structure of the tooth portion 32 is determined, the size of the winding area is fixed, and thus the space that can be used to accommodate the wire directly affects the slot fill rate. Since the conductor frame 1 of this embodiment is installed on the end surface and the winding guide structure 11 is arranged on the side, more space can be reserved for the conductor in some implementation processes, so that the slot fill rate of the motor stator is high, which is beneficial to improving the motor performance.

[0061] Since the aforementioned insulating skeleton assembly 100 is arranged on the tooth portion 32, the winding path of the wire on the motor stator will be guided by the winding guide structure 11 on the wire frame 1, the winding on the motor stator has high stability, and the winding path can be adjusted flexibly at a lower cost.

[0062] In addition, this embodiment also provides a motor, including a rotor and the motor stator of the above example. The rotor can be located at the center of the motor stator and cooperate with the motor stator to achieve rotation. Due to the use of the above electronic stator, the winding of the motor is stable and accurate, and the cost of changing the winding path is low.

[0063] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made according to the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A lead frame for motor winding, characterized in that: It includes a winding guide structure and a first mounting structure; The winding guide structure is arranged on the side of the wire rack and is used to guide the winding path of the wire; The first mounting structure is arranged on the end surface of the lead frame and is used for being detachably fixedly connected to the insulating frame.

2. The lead frame according to claim 1, wherein: The winding guide structure includes a plurality of bar grids arranged at intervals; through slots are formed between adjacent bar grids, so that the wires are arranged based on the bar grids and the through slots.

3. The lead frame according to claim 2, wherein: The lead frame includes a first winding guide structure and a second winding guide structure respectively arranged on two side surfaces of the lead frame.

4. The lead frame according to any one of claims 1 to 3, characterized in that: The first mounting structure comprises a main body plate, and the main body plate is provided with a first buckle or a first slot for being engaged and fixed with the insulating frame.

5. The lead frame according to any one of claims 1 to 3, characterized in that: The first mounting structure comprises a main body plate, and a first adhesive layer is arranged on the inner side of the main body plate. The first adhesive layer is used to bond and fix the lead frame to the insulating frame.

6. An insulating skeleton, characterized in that: The insulating frame includes an end face and a side face; a second mounting structure is provided on the end face of the insulating frame, and the second mounting structure is used to be detachably fixedly connected to the first mounting structure of the lead frame according to any one of claims 1 to 5, so that the lead frame is mounted on the outer surface of the insulating frame; wherein the second mounting structure includes at least one of the following: A second card slot or a second card buckle; Second adhesive layer.

7. An insulating skeleton assembly, characterized in that: It comprises an insulating frame and the lead frame according to any one of claims 1 to 5, wherein the insulating frame comprises an end face and a side face; The conductor is mounted on the outer surface of the insulating frame; the end surface of the insulating frame is fixedly connected to the first mounting structure of the conductor frame, and the winding guide structure of the conductor frame is located on the side surface of the insulating frame.

8. The insulating skeleton assembly according to claim 7, characterized in that: The insulating frame assembly includes two lead frames; an opening for inserting the insulating frame is provided at one end opposite to the end surface of the lead frame, so that the two lead frames can be inserted from both ends of the insulating frame respectively.

9. A motor stator, characterized in that: It comprises a stator core and the insulating skeleton assembly as claimed in claim 7 or 8; the stator core comprises a yoke portion and a tooth portion, and the insulating skeleton is arranged on the outer surface of the tooth portion.

10. A motor, characterized in that: The electric machine comprises a rotor and the electric machine stator according to claim 9.

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