Flat wire stator and motor

Abstract

The invention discloses a flat wire stator, which comprises a stator core and a flat wire stator winding, and is characterized in that the stator core is provided with a plurality of stator slots which are arranged at equal intervals along the circumferential direction and extend along the axial direction of the 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, 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 one side 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 technical field of motors, and in particular to a flat wire stator and a motor. Background Art

[0002] At present, the motor stator is an important part of motors such as generators and starters. The stator is an important part of the motor. The stator consists of three parts: the stator core, the stator winding and the frame. The main function of the stator is to generate a rotating magnetic field, while the main function of the rotor is to be cut by the magnetic lines of force in the rotating magnetic field to generate output current. At the same time, the stator winding can be divided into round wire and flat wire. The difference between the flat wire motor and the round wire motor lies in the way the copper wire is formed. The flat wire is conducive to the improvement of the motor slot full rate. Generally, the slot full rate of the round wire motor is about 50%, while the slot full rate of the flat wire motor can reach more than 70%. The improvement of the slot full rate means that more copper can be filled under the premise of unchanged space, the resistance of the motor is reduced, and the copper loss is reduced under the same current.

[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 synchronously achieve the reasonable arrangement of the lead-in wires and lead-out wires. Summary of the invention

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

[0005] To achieve the above objectives, the technical solution adopted in the present application is: to provide a flat wire stator, comprising: a stator core and a flat wire stator winding, the stator core is provided with a plurality of stator slots arranged equidistantly along the circumferential direction and extending axially along the 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 of the stator slots 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 a side away from the inner diameter space of the stator core.

[0006] As a preferred embodiment, 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 arranged on the inner side, and the inner side is a 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 a PIN wire spanning a full distance, a PIN wire spanning a long distance, and a PIN wire spanning a 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, the PIN wires spanning 2-3 layers of the full distance, the PIN wires spanning 4-5 layers of the full distance, the PIN wires spanning 5-5 layers of the long distance, and the 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] Further preferably, the structures of the full-distance PIN lines spanning 2-3 layers, the full-distance PIN lines spanning 4-5 layers, the long-distance PIN lines spanning 5-5 layers, and the short-distance PIN lines spanning 5-5 layers are the same.

[0011] Further preferably, the PIN wire includes a welding end, a twist 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 at one end surface of the stator core, and the welding end is located at the other end surface of the stator core; wherein the twist 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 ends.

[0012] Further preferably, 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 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] Further preferably, 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 wire 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, the present application also provides a motor, which includes: a motor rotor and a motor stator, the motor stator is connected to the motor rotor, and the motor stator is specifically a flat wire stator of any one of the above items.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] Through the arrangement of the lead-in wires and the lead-out wires, the stator core is very compact in the circumferential direction, which enables easy bus arrangement and simple structure; the winding envelope at both ends of the stator core is larger than the inner diameter of the core, and the rotor can be freely assembled at both ends; the types of PIN wires used are few, and at the same time, the wiring scheme achieves a balance between space and potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a flat wire stator;

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

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

[0020] Figure 4 It is a structural schematic diagram of the stator core;

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

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

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

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

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

[0026] Fig.10 It is a schematic diagram of the structure of the PIN line across 5-5 layers;

[0027] Fig.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, stator winding; 12, stator slot; 13, stator core inner diameter space; 14, three-phase winding; 20a, PIN wire across 2-3 layers; 20b, PIN wire across 4-5 layers; 20c, long-distance PIN wire across 5-5 layers; 20d, short-distance PIN wire across 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 line; 40, lead-in line; 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 the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present 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 the present application.

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

[0032] The terms "including" 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 comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[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 power is applied, 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 larger functional structure, including multiple turns of wire and an insulating layer. The PIN wire is a component that constitutes a part of the coil. In the flat wire stator 1 of the present 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. The PIN wire usually has a specific structure, including a welding end, a twist section, a straight section, a U-shaped end, etc., which is mainly used to realize the flow of current in a specific path in the stator winding 11 and connect different coil parts.

[0034] Therefore, in a preferred embodiment, see specifically Figures 1 to 4The present application provides a flat wire stator 1, comprising: a stator core 10 and a flat wire stator winding 11, the stator core 10 is provided with a plurality of stator slots 12 which are arranged equidistantly along the circumferential direction and extend axially along the stator core 10; the flat wire stator winding 11 comprises a three-phase winding 14, the three-phase winding 14 comprises a plurality of coils, the plurality of coils are wound in the stator slots 12, each stator slot 12 is provided with an odd number of layers of PIN wires, and the lead-in wires 40 and the lead-out wires 30 in the coils are arranged on the two outermost layers of PIN wires, and the outer side is a side away from the inner diameter space 13 of the stator core.

[0035] As a preferred embodiment, the PIN wire in the present application document is provided with five layers, that is, correspondingly, the stator slots 12 in the stator core 10 have a total of five slot layers.

[0036] 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 set 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 the present 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 outermost two layers of PIN wires, see Figure 2 In contrast, the innermost side of the flat wire stator 1 is a same-layer PIN wire setting, 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 a 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 outermost two layers of the lead-in wire 40 and the lead-out wire 30, thereby realizing an easier arrangement of the external busbar, a simple structure, and a higher power density of the flat wire stator 1 with a stacked winding setting.

[0037] As another preferred embodiment, the innermost side of the stator core 10 is provided with PIN wires of the same layer, and both the 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.

[0038] Further preferably, each phase in the three-phase winding 14 includes a first branch and a second branch, and the first branch and the second branch are both composed of a PIN wire spanning a full distance, a PIN wire spanning a long distance, and a PIN wire spanning a short distance; wherein the PIN wires include, arranged along the radial direction of the stator core 10 from the outside to the inside as follows: a lead-out wire 30 of a full distance, an lead-in wire 40 of a full distance, a PIN wire 20a spanning 2-3 layers of a full distance, a PIN wire 20b spanning 4-5 layers of a full distance, a PIN wire 20c spanning 5-5 layers of a long distance, and a PIN wire 20d spanning 5-5 layers of a short distance.

[0039] 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 .

[0040] More preferably, the structures of the full-distance PIN line 20a spanning 2-3 layers, the full-distance PIN line 20b spanning 4-5 layers, the long-distance PIN line 20c spanning 5-5 layers, and the short-distance PIN line 20d spanning 5-5 layers are the same.

[0041] 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.

[0042] Further preferably, the lead-out wire 30 of the full pitch has the same structure as the lead-in wire 40 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 12.

[0043] It should be noted that the same structure mentioned above refers to the same cross-layer and same span PIN lines, which have the same structure. In addition, due to certain designs, such as 1-1 layer PIN full spacing, two types of PIN lines will be designed.

[0044] It is further preferred that the short-distance PIN wire 20d spanning 5-5 layers and the long-distance PIN wire 20c spanning 5-5 layers 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-distance PIN wire 20d spanning 5-5 layers and the long-distance PIN wire 20c spanning 5-5 layers 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.

[0045] Among them, it should be noted that the full-pitch is a PIN line spanning 6 slot pitches, that is, the PIN line spanning 1-7 slot pitches is a full-pitch PIN line, the long-pitch is a PIN line spanning 7 slot pitches, that is, the PIN line spanning 1-8 slot pitches is a long-pitch PIN line, and the PIN line spanning 5 slot pitches is a short-pitch PIN line, spanning 1-6 slot pitches.

[0046] 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-span 2-3 layer PIN wire 20a, the full-span 4-5 layer PIN wire 20b, the long-span 5-5 layer PIN wire 20c and the short-span 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 single 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, and the structural nodes are the same, so they are uniformly labeled.

[0047] Furthermore, see specifically Figures 5 to 11 , Fig.11 The wiring method is specifically shown. The full-spacing PIN line 20a spanning 2-3 layers, the full-spacing PIN line 20b spanning 4-5 layers, the long-spacing PIN line 20c spanning 5-5 layers, and the short-spacing PIN line 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, wherein 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 line is inserted into the stator slot 12 of the corresponding stator core 10.

[0048] 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 via the corresponding first welding end 21 or the second welding end 27.

[0049] It should also be noted that, see Figure 8 and Fig. 9 There are two twisting directions of the first twisting section 22 and the second twisting section 26 in the full-pitch 2-3 layer PIN line 20a, which are respectively Fig. 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 the figure are twisted toward the middle direction.

[0050] Among them, see Figure 7 In the PIN line 20b of the entire distance 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.

[0051] See Fig.10 In the short-distance 5-5 layer PIN line 20d, 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.

[0052] See also Fig.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.

[0053] It should be noted that the short-distance 5-5 layer PIN wire 20d and the long-distance 5-5 layer PIN wire are arranged as the innermost same layer PIN wires and are all formed radially outward to be larger than the inner diameter of the core.

[0054] contrast Fig. 9 and Fig.10 The direction in which the first twist section 22 and the second twist section 26 in the full-distance 2-3 layer PIN line 20a twist in the same direction is opposite to the direction in which the first twist section 22 and the second twist section 26 in the long-distance 5-5 layer PIN line 20c twist in the same direction.

[0055] See also Figure 5 and Figure 6 In the lead-out line 30 arranged with a full pitch, there is only one twisting direction of the first twisting section 22 and the second twisting section 26, that is, the first twisting section 22 and the second twisting section 26 twist in opposite directions. Similarly, in the lead-in line 40 arranged with a full pitch, there is also only one twisting direction of the first twisting section 22 and the second twisting section 26, that is, the first twisting section 22 and the second twisting section 26 twist in the same direction.

[0056] That is, the first twisting section 22 in 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.

[0057] Among them, when the current enters the three-phase winding 14 through the lead-in wire 40 in the flat wire stator winding 11, since the three-phase winding 14 is connected by PIN wires of different spans, the current flows in a specific path. Under the magnetic field of the stator core 10, according to the principle of electromagnetic induction, the energized winding will generate a magnetic field. The current in the three-phase winding 14 changes with time, and the generated magnetic field also changes continuously. The stator magnetic field interacts with the rotor magnetic field in the motor, thereby generating electromagnetic force to drive the rotor to rotate. At the same time, the working efficiency of the flat wire stator 1 is affected by the following factors: the design of the winding structure and the design of the stator core 10. Specifically, the design of the span PIN wire will affect the distribution and intensity of the magnetic field. The appropriate span combination can make the magnetic field more uniform and improve the efficiency of the motor. Coil distribution, the uniform distribution of multiple coils in the circumferential direction of the core affects the stability and symmetry of the magnetic field. The more uniform the distribution, the more stable the interaction of the magnetic field and the higher the efficiency. The arrangement of the lead-in and lead-out wires 30, the way in which they are arranged on the two outermost layers of PIN wires, if unreasonable, may cause 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, and unreasonable size may reduce efficiency.

[0058] Therefore, in the actual operation process, the flat wire stator 1 in the present application document is constituted 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 of 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.

[0059] The arrangement of PIN wires of different spans in different slot layers of the stator core 10 makes the distribution of the magnetic field more reasonable, which helps to improve the efficiency and performance of the motor. At the same time, multiple coils are evenly distributed around the core, ensuring the uniformity and stability of the magnetic field. The specific arrangement of the lead-in and lead-out wires 30 and the setting of the innermost PIN wires in the same layer, while achieving spatial and potential balance, also optimizes the current flow path and the magnetic field generation effect, so that the entire motor system can operate efficiently and stably.

[0060] Furthermore, in another preferred embodiment, the present application also provides a motor, which includes: a motor rotor and a motor stator, the motor stator is connected to the motor rotor, and the motor stator is specifically any one of the flat wire stators 1 mentioned above, and the motor has the beneficial effects of any one of the flat wire stators 1 mentioned above.

[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 by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and 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 attached claims and their equivalents.

Claims

1. A flat wire stator, characterized in that: include: A stator core and a flat wire stator winding, wherein the stator core is provided with a plurality of stator slots which are arranged equidistantly in the circumferential direction and extend axially along the stator core; The flat wire stator winding includes a three-phase winding, and the three-phase winding includes a plurality of coils, and the plurality of coils are wound in the stator slots, each of the stator slots 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 a side away from the inner diameter space of the stator core.

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

3. The flat wire stator according to claim 1, characterized in that: 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 a side close to the inner diameter space of the stator core.

4. The flat wire stator according to claim 3, characterized in that: Each phase of the three-phase winding includes a first branch and a second branch, and the first branch and the second branch are connected by a PIN line spanning a full distance, a PIN line spanning a long distance, and a PIN line spanning a short distance; Among them, the PIN wires include, arranged along the radial direction of the stator core from the outer side to the inner side 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 according to claim 1, characterized in that: 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 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 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 line 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 twisting 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 corresponding welding ends.

8. The flat wire stator according to claim 6, characterized in that: 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 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.

9. The flat wire stator according to claim 4, characterized in that: The short-distance PIN wires spanning 5-5 layers and the long-distance PIN wires spanning 5-5 layers are arranged in the stator core closest to the inner same-layer PIN wires, and the wire 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. A motor, characterized in that: The motor comprises: Motor rotor; A motor stator, wherein the motor stator is connected to the motor rotor, and the motor stator is specifically a flat wire stator as described in any one of claims 1-9.

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