Flat wire stator winding

Abstract

The utility model discloses a flat wire stator winding, the flat wire stator winding acts in stator slots of a stator core, the flat wire stator winding comprises a three-phase winding, the three-phase winding comprises a plurality of coils, the plurality of coils are wound in the stator slots, each stator slot is provided with odd number layers of PIN wires, and lead-in wires and lead-out wires in the coils are arranged on two layers of PIN wires on the outermost side, and the outer side is far away from the inner diameter space of the stator core. Through the arrangement of the lead-in wire and the lead-out wire, the stator core is very compact in the circumferential direction, and the busbar is easy to arrange and simple in structure; winding envelopes at the two ends of the stator core are larger than the inner diameter of the core, and the two ends of the rotor can be freely assembled. And the types of the used PIN wires are few, and meanwhile, the wiring scheme realizes the balance of space and potential.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a flat wire stator winding. Background Art

[0002] Currently, motor stators are a crucial component of motors such as generators and starters. The stator is a crucial part of an electric motor. The stator consists of three parts: the stator core, flat-wire stator windings, and the motor frame. The stator's primary function is to generate a rotating magnetic field, while the rotor's primary function is to be cut by magnetic lines of force within the rotating magnetic field, generating output current. Flat-wire stator windings can be further categorized as round wire or flat wire. Flat-wire motors differ from round-wire motors in the way the copper wire is formed. Flat wire facilitates a higher slot fill rate. While round-wire motors typically have a slot fill rate of around 50%, flat-wire motors can achieve a slot fill rate of over 70%. This higher slot fill rate allows for more copper to be packed into the motor while maintaining the same space, reducing the motor's resistance and, at the same current, lowering copper losses.

[0003] However, the existing flat wire stator has certain defects in the winding method. Under the premise of ensuring that the inner diameter space of the core is not occupied during the winding process, it is impossible to achieve the balance of space and potential at the same time, and it is impossible to achieve the reasonable arrangement of the lead-in wires and lead-out wires at the same time. Utility Model Content

[0004] The purpose of the present application is to provide a flat wire stator winding to solve the defects generated in the above flat wire stator winding process.

[0005] To achieve the above objectives, the technical solution adopted in this application is: providing a flat wire stator winding, the flat wire stator winding acting on the stator slot of the stator core, the flat wire stator winding including: a three-phase winding, the three-phase winding including multiple coils, multiple coils wound in the stator slots, each stator slot is provided with an odd number of layers of PIN wires, and the lead-in wires and lead-out wires in the coils are arranged on the outermost two layers of PIN wires, and the outer side is the side away from the inner diameter space of the stator core.

[0006] As a preference, the odd-numbered PIN lines are provided with five layers.

[0007] As another preferred embodiment, the innermost side of the stator core is provided with PIN wires of the same layer, and both long-distance and short-distance PIN wires are provided on the inner side, and the inner side is the side close to the inner diameter space of the stator core.

[0008] Further preferably, each phase of the three-phase winding includes a first branch and a second branch, and the first branch and the second branch are both composed of PIN wires spanning the full distance, PIN wires spanning the long distance, and PIN wires spanning the short distance; wherein the PIN wires include, arranged along the radial direction of the stator core from the outside to the inside as follows: the lead-out wires of the full distance, the lead-in wires of the full distance, PIN wires spanning 2-3 layers of the full distance, PIN wires spanning 4-5 layers of the full distance, PIN wires spanning 5-5 layers of the long distance, and PIN wires spanning 5-5 layers of the short distance.

[0009] Further preferably, the U-shaped end and the welding end of the coil are respectively located at opposite ends of the stator core, and the welding ends of the lead-in wire and the lead-out wire are located at opposite ends of the stator core.

[0010] More preferably, the structures of the full-pitch PIN lines spanning 2-3 layers, the full-pitch PIN lines spanning 4-5 layers, the long-pitch PIN lines spanning 5-5 layers, and the short-pitch PIN lines spanning 5-5 layers are the same.

[0011] Further preferably, the PIN wire includes a welding end, a twisted section, a straight section and a U-shaped end connected in sequence; the straight section is inserted into the slot layer corresponding to the stator slot, the U-shaped end is located on one end surface of the stator core, and the welding end is located on the other end surface of the stator core; wherein the twisted section is inserted into the corresponding stator slot in the straight section and then twisted, and each of the PIN wires is welded and connected via the corresponding welding end.

[0012] Further preferably, the lead-out wires of the full pitch have the same structure as the lead-in wires of the full pitch, and both include a welding end, a twisting section, and a straight section connected in sequence; wherein the twisting section is twisted after the straight section is inserted into the corresponding stator slot.

[0013] It is further preferred that the short-distance PIN wires spanning 5-5 layers and the long-distance PIN wires spanning 5-5 layers are arranged closest to the inner same-layer PIN wires in the stator core, and the diameters of the short-distance PIN wires spanning 5-5 layers and the long-distance PIN wires spanning 5-5 layers are both formed toward the outside, so that the envelope size of the PIN wire arrangement is larger than the inner diameter of the stator core.

[0014] Furthermore, a plurality of stator slots are provided, and the plurality of stator slots are equidistantly arranged along the circumference of the stator core and extend axially along the stator core.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The arrangement of lead-in and lead-out wires makes the stator core very compact in the circumferential direction, enabling easy busbar arrangement and a simple structure. The winding envelope at both ends of the stator core is larger than the core inner diameter, allowing the rotor to be freely assembled at both ends. A small number of PIN wires are used, and the wiring scheme achieves a balance between space and potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the flat wire stator;

[0018] Figure 2 This is a schematic diagram of the structure of the stator core lead-out terminal in the flat wire stator;

[0019] Figure 3 This is a schematic diagram of the structure of the welding end of the stator core in the flat wire stator;

[0020] Figure 4 Schematic diagram of the structure of the stator core;

[0021] Figure 5 It is a structural diagram of the lead-in line;

[0022] Figure 6 It is a structural diagram of the lead wire;

[0023] Figure 7 This is a schematic diagram of the structure of the PIN line across 4-5 layers;

[0024] Figure 8 This is a structural diagram of a twisting method in a PIN line spanning 2-3 layers;

[0025] Figure 9 This is a structural diagram of another twisting method in the PIN line across 2-3 layers;

[0026] Figure 10 This is a schematic diagram of the structure of the PIN line across 5-5 layers;

[0027] Figure 11 This is the wiring diagram of the flat wire stator in this application.

[0028] In the figure: 1. Flat wire stator; 10. Stator core; 11. Flat wire stator winding; 12. Stator slot; 13. Inner diameter space of stator core; 14. Three-phase winding; 20a. PIN wire spanning 2-3 layers; 20b. PIN wire spanning 4-5 layers; 20c. Long-distance PIN wire spanning 5-5 layers; 20d. Short-distance PIN wire spanning 5-5 layers; 21. First welding end; 22. First twist section; 23. First straight section; 24. U-shaped end; 25. Second straight section; 26. Second twist section; 27. Second welding end; 30. Lead-out wire; 40. Lead-in wire; 50. Stator core welding end; 60. Stator core lead-out end. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0033] At the same time, it should be noted that the coil is a conductive winding part formed by winding multiple turns of flat copper wire in the slots of the stator core 10 according to a specific winding scheme. Its main function is to generate a magnetic field after being energized, and interact with the rotor magnetic field in the motor to generate electromagnetic force to drive the rotor to rotate. The coil as a whole is a large functional structure, including multiple turns of wire and insulation layer and other parts. PIN wire is a component that constitutes a coil. In the flat wire stator 1 of this application document, there are different types of PIN wires, such as lead-out PIN wires (full pitch), lead-in wires 40 (full pitch), PIN wires across different layers (full pitch), PIN wires across 5-5 layers (long distance or short distance), etc. These PIN wires are combined to form a coil through a specific connection method, such as welding. PIN wires usually have a specific structure, including welding ends, twisted sections, straight sections, U-shaped ends, etc., which are mainly used to realize the flow of current in a specific path in the flat wire stator winding 11 and connect different coil parts.

[0034] Therefore, in a preferred embodiment, see Figures 1 to 11The present application provides a flat wire stator winding 11, which acts on the stator slot 12 of the stator core 10. The flat wire stator winding 11 includes: a three-phase winding 14, which includes multiple coils. The multiple coils are wound in the stator slot 12, and each stator slot 12 is provided with an odd number of layers of PIN wires, and the lead-in wire 40 and the lead-out wire 30 in the coil are arranged on the outermost two layers of PIN wires, and the outer side is the side away from the inner diameter space 13 of the stator core.

[0035] Similarly, a plurality of stator slots 12 are provided. The plurality of stator slots 12 are equidistantly arranged along the circumference of the stator core 10 and extend axially along the stator core 10 . The stator core 10 cooperates with the flat wire stator winding 11 to form the flat wire stator 1 .

[0036] As a preferred embodiment, the PIN wires in the present application are provided with five layers, that is, correspondingly, the stator slots 12 in the stator core 10 have a total of five slot layers.

[0037] Among them, the number of stator slots 12 is 48, which are arranged around the stator core 10. The three-phase winding 14 and the multiple coils are evenly distributed in the circumferential direction of the stator core 10, thereby achieving a balance effect of space and potential at the same time. At the same time, since the flat wire stator 1 in this application document has a five-layer PIN wire setting, and correspondingly, the lead-in wire 40 and the lead-out wire 30 are set on the two outermost layers of PIN wires, see Figure 2 In contrast, the innermost side of the flat wire stator 1 is arranged with the same layer of PIN wires, and the long-distance and short-distance PIN wires are arranged on the inner side. Therefore, when the stator core 10 in the present application document is used in the motor, it can ensure that the motor is balanced in inductance. At the same time, the spatial angle of the flat wire stator 1 is very small, which is convenient for arranging the two outermost layers of the lead-in wire 40 and the lead-out wire 30, thereby realizing easier arrangement of the external busbar, simple structure, and higher power density of the flat wire stator 1 with stacked winding arrangement.

[0038] As another preferred embodiment, the innermost side of the stator core 10 is provided with PIN wires of the same layer, and both long-distance and short-distance PIN wires are provided on the inner side, which is the side close to the inner diameter space 13 of the stator core.

[0039] Further preferably, each phase of the three-phase winding 14 includes a first branch and a second branch, and the first branch and the second branch are both connected by PIN wires spanning full distances, PIN wires spanning long distances, and PIN wires spanning short distances; wherein the PIN wires include, arranged from the outside to the inside of the stator core 10 radially, as follows: full-distance lead-out wires 30, full-distance lead-in wires 40, full-distance PIN wires spanning 2-3 layers 20a, full-distance PIN wires spanning 4-5 layers 20b, long-distance PIN wires spanning 5-5 layers 20c, and short-distance PIN wires spanning 5-5 layers 20d.

[0040] More preferably, the U-shaped end 24 and the welding end of the coil are respectively located at opposite ends of the stator core 10 , and the welding ends of the lead-in wire 40 and the lead-out wire 30 are located at opposite ends of the stator core 10 .

[0041] More preferably, the structures of the full-pitch PIN line spanning 2-3 layers 20a, the full-pitch PIN line spanning 4-5 layers 20b, the long-pitch PIN line spanning 5-5 layers 20c, and the short-pitch PIN line spanning 5-5 layers 20d are the same.

[0042] Further preferably, the PIN wire includes a welding end, a twist section, a straight section and a U-shaped end 24 connected in sequence; the straight section is inserted into the slot layer of the corresponding stator slot 12, the U-shaped end 24 is located at one end surface of the stator core 10, and the welding end is located at the other end surface of the stator core 10; wherein, the twist section is inserted into the corresponding stator slot 12 in the straight section and then twisted, and each PIN wire is welded and connected through the corresponding welding end.

[0043] Further preferably, the full-pitch lead-out wire 30 has the same structure as the full-pitch lead-in wire 40 and both include a welding end, a twisting section, and a straight section connected in sequence; wherein the twisting section is twisted after the straight section is inserted into the corresponding stator slot 12 .

[0044] It should be noted that the "same structure" mentioned above refers to the same structure for PIN lines with the same span and the same pitch. In some designs, such as 1-1 layer PIN pitch, two different PIN line structures may be designed.

[0045] Further preferably, the short-spacing 5-5-layer PIN wire 20d and the long-spacing 5-5-layer PIN wire 20c are arranged as the PIN wires of the same layer closest to the inner side of the stator core 10, and the diameters of the short-spacing 5-5-layer PIN wire 20d and the long-spacing 5-5-layer PIN wire 20c are both formed outward, so that the envelope size of the PIN wire arrangement is larger than the inner diameter of the stator core 10.

[0046] Among them, it should be noted that the full-pitch is the PIN line spanning 6 slot pitches, that is, the PIN line spanning 1-7 slot pitches is the full-pitch PIN line, the long-pitch is the PIN line spanning 7 slot pitches, that is, the PIN line spanning 1-8 slot pitches is the long-pitch PIN line, and the PIN line spanning 5 slot pitches is the short-pitch PIN line, spanning 1-6 slot pitches.

[0047] At the same time, in order to achieve the beneficial effects of the flat wire stator 1 in the present application document, the present application document provides a specific PIN wire twisting method in a specific embodiment, and it should be noted that the welding ends, twist sections, straight sections and U-shaped ends 24 mentioned in the full-pitch 2-3 layer PIN wire 20a, the full-pitch 4-5 layer PIN wire 20b, the long-pitch 5-5 layer PIN wire 20c and the short-pitch 5-5 layer PIN wire 20d, the lead-in wire 40 and the lead-out wire 30 are uniformly labeled in a single cross-layer PIN wire structure or a separate lead-in and lead-out PIN wire structure. For example, the lead-in wire 40 includes a first welding end 21, a first twist section 22, a first straight section 23, a second twist section 26 and a second welding end 27. Similarly, the lead-out wire 30 also includes a first welding end 21, a first twist section 22, a first straight section 23, a second twist section 26 and a second welding end 27. The structural nodes are the same, so they are uniformly labeled.

[0048] Furthermore, see specifically Figures 5 to 11 , Figure 11 The wiring method is specifically shown. The full-spacing PIN wire 20a spanning 2-3 layers, the full-spacing PIN wire 20b spanning 4-5 layers, the long-spacing PIN wire 20c spanning 5-5 layers, and the short-spacing PIN wire 20d spanning 5-5 layers all include a first welding end 21, a first twist section 22, a first straight section 23, a U-shaped end 24, a second straight section 25, a second twist section 26, and a second welding end 27 connected in sequence. Among them, the first straight section 23 and the second straight section 25 are respectively inserted into the slot layers of the corresponding stator slot 12, the U-shaped end 24 is located on one end face side of the stator core 10, and the first welding end 21, the first twist section 22, the second twist section 26, and the second welding end 27 are located on the other end face side of the stator core 10. At the same time, the first twist section 22 and the second twist section 26 are twisted after the PIN wire is inserted into the stator slot 12 of the corresponding stator core 10.

[0049] Similarly, the lead-out wire 30 and the lead-in wire 40 both include a first welding end 21, a first twist section 22, a first straight section 23, a second twist section 26, and a second welding end 27 connected in sequence, wherein the first twist section 22 and the second twist section 26 are twisted after the PIN wire is inserted into the corresponding stator slot 12 in the stator core 10, and the above-mentioned PIN wires are welded and connected through the corresponding first welding end 21 or the second welding end 27.

[0050] It should also be noted that, see Figure 8 and Figure 9 There are two twisting directions of the first twisting section 22 and the second twisting section 26 in the PIN line 20a of the full distance spanning 2-3 layers, respectively. Figure 9 In the embodiment, the first twisting section 22 and the second twisting section 26 twist in the same direction, and Figure 8The first twisting section 22 and the second twisting section 26 shown in FIG are twisted toward the middle direction.

[0051] Among them, see Figure 7 In the PIN line 20b spanning 4-5 layers, the first twist section 22 and the second twist section 26 have only one twisting direction, that is, the first twist section 22 and the second twist section 26 twist toward the middle direction.

[0052] See Figure 10 In the short-distance 5-5 layer PIN line 20d, the first twisting section 22 and the second twisting section 26 have only one twisting direction, that is, the first twisting section 22 and the second twisting section 26 twist in the same direction.

[0053] See also Figure 10 In the long-distance 5-5 layer PIN line 20c, the first twist section 22 and the second twist section 26 have only one twist direction, that is, the first twist section 22 and the second twist section 26 twist in the same direction.

[0054] It should be noted that the short-distance PIN wire 20d spanning 5-5 layers and the long-distance PIN wire spanning 5-5 layers are arranged as the innermost PIN wires in the same layer and are all formed radially outward to be larger than the inner diameter of the core.

[0055] contrast Figure 9 and Figure 10 The first twist section 22 and the second twist section 26 in the full-length 2-3 layer PIN wire 20a twist in the same direction, and the first twist section 22 and the second twist section 26 in the long-length 5-5 layer PIN wire 20c twist in the same direction are opposite.

[0056] See also Figure 5 and Figure 6 In the lead-out line 30 set at a full pitch, the first twisting section 22 and the second twisting section 26 have only one twisting direction, that is, the first twisting section 22 and the second twisting section 26 twist in opposite directions. Similarly, in the lead-in line 40 set at a full pitch, the first twisting section 22 and the second twisting section 26 also have only one twisting direction, that is, the first twisting section 22 and the second twisting section 26 twist in the same direction.

[0057] That is, the first twisting section 22 of the lead-in wire 40 and the lead-out wire 30 twists in the same direction, and the second twisting section 26 twists in the opposite direction.

[0058] When current enters the three-phase winding 14 through the lead-in wires 40 in the flat wire stator winding 11, the current flows in a specific path because the three-phase winding 14 is connected by PIN wires of different spans. Under the influence of the magnetic field of the stator core 10, the energized winding generates a magnetic field based on the principle of electromagnetic induction. The current in the three-phase winding 14 varies over time, and the resulting magnetic field also varies continuously. The stator magnetic field interacts with the rotor magnetic field in the motor, generating an electromagnetic force that drives the rotor to rotate. The operating efficiency of the flat wire stator 1 is also affected by the following factors: the design of the winding structure and the design of the stator core 10. Specifically, the design of the PIN wire spans affects the distribution and intensity of the magnetic field. A suitable span combination can make the magnetic field more uniform, thereby improving motor efficiency. The coil distribution and the uniformity of the multiple coils around the core's circumference affect the stability and symmetry of the magnetic field. The more uniform the distribution, the more stable the magnetic field interaction and the higher the efficiency. Improper placement of the lead-in and lead-out wires 30, especially their placement on the outermost two layers of PIN wires, can lead to increased resistance or magnetic field interference, affecting efficiency. The relationship between the radial envelope size of the innermost same-layer PIN wire arrangement and the inner diameter of the stator core 10 will affect space utilization and magnetic field distribution. An unreasonable size may reduce efficiency.

[0059] Therefore, in actual operation, the flat wire stator 1 in the present application document is formed by the twisting setting and winding method of the above-mentioned PIN wire. Therefore, the flat wire stator 1 in the present application document can ensure the balance of space and potential while being provided with a unique 5-layer PIN wire structure provided by the flat wire stator 1. At the same time, the innermost same-layer PIN wire is arranged so that its radial envelope size is larger than the inner diameter of the stator core 10, so that the winding arrangement of the entire flat wire stator 1 is relatively compact, and there is no need to borrow the inner diameter space 13 of the stator core.

[0060] PIN wires of varying spans are arranged in different slot layers of the stator core 10, resulting in a more balanced magnetic field distribution, helping to improve motor efficiency and performance. Furthermore, the uniform distribution of multiple coils around the core ensures a uniform and stable magnetic field. The specific arrangement of the lead-in and lead-out wires 30, as well as the placement of the innermost PIN wires in the same layer, not only achieves spatial and potential balance, but also optimizes the current flow path and magnetic field generation, enabling efficient and stable operation of the entire motor system.

[0061] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A flat wire stator winding, characterized in that: The flat wire stator winding acts on the stator slots of the stator core, and the flat wire stator winding includes: The three-phase winding includes multiple coils, each of which is wound in the stator slots. Each stator slot is provided with an odd number of layers of PIN wires, and the lead-in wires and lead-out wires in the coils are provided on the two outermost layers of PIN wires, where the outer side is the side away from the inner diameter space of the stator core.

2. The flat wire stator winding according to claim 1, characterized in that The odd-numbered PIN lines are provided with five layers.

3. The flat wire stator winding according to claim 1, wherein: The innermost side of the stator core is provided with PIN wires of the same layer, and both long-distance and short-distance PIN wires are provided on the inner side, and the inner side is the side close to the inner diameter space of the stator core.

4. The flat wire stator winding according to claim 3, characterized in that: Each phase of the three-phase winding includes a first branch and a second branch, wherein the first branch and the second branch are connected by a PIN wire spanning a full distance, a PIN wire spanning a long distance, and a PIN wire spanning a short distance; Among them, the PIN wires include, arranged in the radial direction of the stator core from the outside to the inside as follows: the lead-out wires with full pitch, the lead-in wires with full pitch, the PIN wires spanning 2-3 layers with full pitch, the PIN wires spanning 4-5 layers with full pitch, the PIN wires spanning 5-5 layers with long pitch, and the PIN wires spanning 5-5 layers with short pitch.

5. The flat wire stator winding according to claim 1, wherein: The U-shaped end and the welding end of the coil are respectively located at two opposite ends of the stator core, and the welding ends of the lead-in wire and the lead-out wire are located at two opposite ends of the stator core.

6. The flat wire stator winding according to claim 4, characterized in that The structures of the full-distance PIN line spanning 2-3 layers, the full-distance PIN line spanning 4-5 layers, the long-distance PIN line spanning 5-5 layers, and the short-distance PIN line spanning 5-5 layers are the same.

7. The flat wire stator winding according to claim 6, characterized in that: The PIN line includes a welding end, a twist section, a straight section and a U-shaped end connected in sequence; The straight segment is inserted into the slot layer corresponding to the stator slot, the U-shaped end is located at one end surface of the stator core, and the welding end is located at the other end surface of the stator core; The twisted section is inserted into the corresponding stator slot of the straight section and then twisted, and the PIN wires are connected by welding through corresponding welding ends.

8. The flat wire stator winding according to claim 6, wherein: The lead-out wire of the full pitch has the same structure as the lead-in wire of the full pitch, and both include a welding end, a twist section, and a straight section connected in sequence; Wherein, the twisting section is twisted after the straight section is inserted into the corresponding stator slot.

9. The flat wire stator winding according to claim 4, wherein: The short-distance PIN wires spanning 5-5 layers and the long-distance PIN wires spanning 5-5 layers are arranged closest to the inner same-layer PIN wires in the stator core, and the diameters of the short-distance PIN wires spanning 5-5 layers and the long-distance PIN wires spanning 5-5 layers are both formed toward the outside, so that the envelope size of the PIN wire arrangement is larger than the inner diameter of the stator core.

10. The flat wire stator winding according to any one of claims 1 to 9, characterized in that: A plurality of stator slots are provided, and the plurality of stator slots are arranged equidistantly along the circumference of the stator core and extend axially along the stator core.

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