Flat wire stator and motor

Abstract

The invention discloses a flat wire stator and a motor, and the flat wire stator comprises a stator core and a stator winding, and the stator core is provided with a plurality of stator grooves which are distributed at equal intervals in the circumferential direction and extend in the axial direction of the stator core; the 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 an even number of 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 iron core. Therefore, the lead-in wire and the lead-out wire are arranged on the outermost side, connection with an external circuit is facilitated, structural complexity and potential fault risks caused by shuttling of the circuit in the stator iron core are avoided, meanwhile, precious space near the inner diameter of the stator iron core is not occupied, and arrangement compactness of the internal winding is guaranteed.

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] Currently in the field of motor technology, the flat wire stator is a key component of the motor, and its performance directly affects the overall performance of the motor. Traditional stator design faces many technical difficulties and urgently needs innovation and optimization.

[0003] Early stator cores lacked sufficient consideration in the design of the number of slots. The number of slots was small and the arrangement was irregular, which could not provide sufficient and uniform winding space for the windings. This resulted in an unbalanced distribution of the windings on the stator, which not only made it difficult to achieve a balance between space and potential, but also greatly reduced the electromagnetic performance and operating stability of the motor. For example, in some industrial motors, due to unreasonable stator slot design, the motor frequently experienced problems such as vibration and abnormal heating during operation, which seriously affected the normal use and life of the equipment. At the same time, the designs in related technologies often randomly arrange the lead-in and lead-out wires inside the stator core, and the lines shuttle between the layers of windings. This not only makes the internal structure of the stator complex, increases the difficulty of winding and production costs, but also easily causes potential faults such as line short circuits and open circuits. Once a fault occurs, it is extremely difficult to troubleshoot and repair, which seriously affects production continuity. Summary of the invention

[0004] The purpose of the present application is to provide a flat wire stator and a motor to solve the problem of unreasonable flat wire stator structure design.

[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 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 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 even 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 preference, 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.

[0007] As another preferred embodiment, each phase of the three-phase winding includes a first branch, a second branch and a third branch, and each branch is 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 are arranged in sequence from the outer side to the inner side along the radial direction of the stator core as follows: a PIN wire spanning 1-1 layers at a full distance, a PIN wire spanning 2-3 layers at a full distance, a PIN wire spanning 4-5 layers at a full distance, a PIN wire spanning 6-6 layers at a long distance and a PIN wire spanning 6-6 layers at a short distance, and the PIN wire includes a first welding end, a first twist section, a first straight section, a U-shaped end, a second straight section, a second twist section and a second welding end connected in sequence.

[0008] Further preferably, the stator core comprises a U-shaped side and a welding side, and the welding ends of the lead-in wire and the lead-out wire are arranged on the same side and are located on the welding side of the stator core.

[0009] It is further preferred that the first twist section and the second twist section in the full-span PIN line spanning 1-1 layers, the long-span PIN line spanning 6-6 layers, and the short-span PIN line spanning 6-6 layers twist in the same direction; the first twist section and the second twist section of the full-span PIN line spanning 2-3 layers and the full-span PIN line spanning 4-5 layers twist in opposite directions, respectively twisting to both sides away from the center direction.

[0010] Preferably, the long-distance PIN line spanning 6-6 layers and the short-distance PIN line spanning 6-6 layers are arranged as innermost PIN lines of the same layer, and are both formed and arranged radially toward the outer side.

[0011] Preferably, the U-shaped end includes a first inclined segment, a cross-layer segment and a second inclined segment which are sequentially connected, the first inclined end is connected to the first straight segment, and the second inclined segment is connected to the second straight segment.

[0012] Further preferably, the long-distance 6-6 layer PIN line is extended with a planar section at the cross-layer section position, and the planar section cooperates with the cross-layer section to transitionally connect the first inclined section and the second inclined section.

[0013] Preferably, the long-distance 6-6 layer PIN line is provided with two U-shaped end structures, one of which is provided on the side of the cross-layer segment close to the first oblique line segment; and the other is provided on the side of the cross-layer segment close to the second oblique line segment.

[0014] Preferably, a motor is further provided, comprising: a motor rotor; and 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 the above.

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

[0016] The stator slots provided in this application document are numerous and evenly spaced, which can provide sufficient and regular winding space for the stator winding, making the distribution of the winding on the stator core more uniform, thereby achieving a balance in space and potential, and ensuring the stability of the motor operation; the 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 and evenly distributed around the stator core, while achieving a balance in space and potential. This uniform distribution makes the magnetic field generated by the three-phase winding more reasonably distributed, reduces electromagnetic interference, improves the electromagnetic performance of the motor, and makes the structure of the entire flat wire stator more regular, which is convenient for installation and maintenance. Each stator slot is provided with an even number 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, with the outer side being the side away from the inner diameter space of the stator core. In this way, the lead-in wires and lead-out wires are placed on the outermost side to facilitate connection with the external circuit, avoiding the structural complexity and potential failure risks caused by the lines running inside the stator core. At the same time, it does not occupy the precious space near the inner diameter of the stator core, ensuring the compactness of the internal winding layout. 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 flat wire stator from a side view;

[0019] Figure 3 It is a structural schematic diagram of the stator core;

[0020] Figure 4 This is a structural diagram of the same-direction twist PIN line;

[0021] Figure 5 Another structural schematic diagram of the same-direction twist PIN line;

[0022] Figure 6 This is a schematic diagram of the structure of the reverse twist PIN line;

[0023] Figure 7 It is a schematic diagram of the structure of the PIN line (line type 1) across 6-6 layers;

[0024] Figure 8 It is a schematic diagram of the structure from a top-down perspective of a PIN line (line type 1) across 6-6 layers;

[0025] Fig. 9 It is a schematic diagram of the structure of the PIN line (line type 2) across 6-6 layers;

[0026] Fig.10It is a schematic diagram of the structure from a top-down perspective of a PIN line (type 2) across 6-6 layers.

[0027] 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, same direction twist PIN wire; 20b, reverse twist PIN wire; 20c, 6-6 layer PIN wire (line type 1); 20d, 6-6 layer PIN wire (line type 2); 21, first welding end; 22, first twist section; 23, first straight section; 24, U-shaped end; 241, first inclined section; 242, cross-layer section; 243, second inclined section; 244, plane section; 25, second straight section; 26, second twist section; 27, second welding end; 30, lead-out line; 40, lead-in line; 50, welding side; 60, U-shaped side. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In a preferred embodiment, see Figures 1 to 10The present application document provides a flat wire stator 1, comprising: a stator core 10 and a stator winding 11, wherein 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, and preferably, the stator core 10 has 54 stator slots 12 which are arranged equidistantly along the circumferential direction; the stator winding 11 comprises a three-phase winding 14, and the three-phase winding 14 comprises a plurality of coils, and the plurality of coils are wound in the stator slots 12 and evenly distributed circumferentially along the stator core 10, and balance in space and potential is achieved at the same time. Each stator slot 12 is provided with an even 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 the side away from the inner diameter space 13 of the stator core.

[0033] 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 wires 30 (full pitch), lead-in wires 40 (full pitch), PIN wires across different layers (full pitch), PIN wires across 6-6 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] Among them, a large number of stator slots 12 arranged at equal intervals can provide sufficient and regular winding space for the stator winding 11, so that the distribution of the winding on the stator core 10 is more uniform, thereby achieving a balance in space and potential, and ensuring the stability of the motor operation; the stator winding 11 includes a three-phase winding 14, and the three-phase winding 14 includes a plurality of coils, and the plurality of coils are wound in the stator slots 12 and evenly distributed in the circumference of the stator core 10, while achieving a balance in space and potential. This uniform distribution method makes the magnetic field distribution generated by the three-phase winding 14 more reasonable, reduces electromagnetic interference, improves the electromagnetic performance of the motor, and makes the structure of the entire flat wire stator 1 more regular, which is convenient for installation and maintenance. Each stator slot 12 is provided with an even number 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. In this way, the lead-in wire 40 and the lead-out wire 30 are placed on the outermost side, which is convenient for connection with the external circuit, avoiding the structural complexity and potential fault risks caused by the lines running inside the stator core 10, and at the same time not occupying the valuable space near the inner diameter of the stator core 10, ensuring the compactness of the internal winding arrangement. At the same time, through the arrangement of the lead-in wire 40 and the lead-out wire 30, the stator core 10 is very compact in the circumferential direction, which can realize easy bus arrangement and simple structure; the winding envelope at both ends of the stator core 10 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 small, saving production and manufacturing costs.

[0035] As a preferred embodiment, the PIN wires in the present application document are arranged with six layers, and correspondingly, the slot layers of the stator slots 12 in the stator core 10 have a total of six layers. At the same time, the innermost side of the stator core 10 is arranged with the same layer of PIN wires, and both the long-distance and short-distance PIN wires are arranged on the inner side. The PIN wires of the innermost layer are arranged so that their radial envelope size is larger than the inner diameter of the stator core 10, wherein the inner side is the side close to the inner diameter space 13 of the stator core. The design of the six layers of PIN wires and the corresponding six layers of slot layers, on the one hand, increases the number of winding turns, improves the electromagnetic induction capability of the motor, and improves the power density; on the other hand, the special arrangement of the innermost layer of PIN wires, the radial envelope size is larger than the inner diameter, and there is no need to borrow the inner diameter space of the core, so that the arrangement of the entire stator winding 11 is relatively compact, avoiding the occupation of the inner diameter space of the core, facilitating the subsequent installation and adaptation of other components, and ensuring the rationality of the internal structure of the motor.

[0036] As another preferred embodiment, each phase of the three-phase winding 14 includes a first branch, a second branch and a third branch, and each branch is composed of a PIN wire across a full distance, a PIN wire across a long distance and a PIN wire across a short distance; wherein, in the present application document, a full distance is a span of nine slots, a long distance is a span of ten slots, and a short distance is a span of seven slots. The PIN wires are arranged in sequence from the outside to the inside along the radial direction of the stator core 10 as follows: a PIN wire across 1-1 layers of full distance, a PIN wire across 2-3 layers of full distance, a PIN wire across 4-5 layers of full distance, a PIN wire across 6-6 layers of long distance and a PIN wire across 6-6 layers of short distance, and the PIN wires 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. Reasonable PIN wire radial layering allows PIN wires of different spans to be arranged in an orderly manner in space, which is convenient for winding processing and fully utilizes the space of stator slot 12, making the winding structure compact and further improving the motor performance.

[0037] Among them, the three-phase winding 14 structure of the three branches provided in the present application document enables the winding structure of the three branches to generate a more complex and delicate magnetomotive force waveform in terms of electromagnetic performance optimization. By reasonably configuring the PIN lines across the full distance, long distance and short distance in each branch, the harmonic components of the magnetomotive force can be more accurately regulated. At the same time, from the perspective of fault tolerance, when one of the branches has faults such as short circuit and open circuit, the remaining two branches can still maintain a certain operating capacity to avoid instantaneous shutdown of the motor. This redundant design provides a certain buffer space for the continuous operation of the motor, so that the system has time to take corresponding protection measures or switch to a backup power supply, etc., reducing the production interruption losses caused by sudden failures, and is particularly suitable for some industrial production processes that have strict requirements on operation continuity, such as automated production lines, uninterruptible power supply systems, etc.

[0038] In terms of manufacturing process adaptability, the design of three branches provides more flexibility for the winding process. The winding parameters of each branch can be adjusted more finely according to different stator core 10 structures, wire slot sizes, and electromagnetic performance targets, including the span selection of PIN wires, the number of layers, etc. This enables the flat wire stator 1 of the present application to better adapt to diverse production and manufacturing conditions, reduce process difficulty, and improve production efficiency.

[0039] Further preferably, the stator core 10 includes a U-shaped side 60 and a welding side 50, and the welding ends of the lead-in wire 40 and the lead-out wire 30 are arranged on the same side and located on the welding side 50 of the stator core 10. The U-shaped end 24 of the PIN wire is arranged on the U-shaped side 60 of the stator core 10, the first welding section and the second welding section are both arranged on the welding side 50, and the first straight section 23 and the second straight section 25 are inserted into the corresponding stator slot 12.

[0040] For further preference, see Figure 4 and Figure 5 , the same-direction twisting PIN line 20a, the twisting directions of the first twisting section 22 and the second twisting section 26 in the full-distance 1-1 layer PIN line, the long-distance 6-6 layer PIN line and the short-distance 6-6 layer PIN line are all the same direction twisting; Figure 6 It is a reverse twist PIN wire 20b. The first twist section 22 and the second twist section 26 of the full-pitch PIN wire spanning 2-3 layers and the full-pitch PIN wire spanning 4-5 layers are both twisted in opposite directions, respectively twisting to both sides away from the center direction. Such a twist design is optimized according to the position and functional requirements of the PIN wires in different layers. The same-direction twist facilitates the centralized arrangement of lines on a specific layer to reduce line crossing, and the reverse twist avoids interference with adjacent layers. The combination of the two ensures that the PIN wire is wound regularly on the stator core 10, fully utilizes the space, and improves the overall compactness and reliability of the winding.

[0041] Preferably, the long-distance PIN wires across 6-6 layers and the short-distance PIN wires across 6-6 layers are arranged as the innermost same-layer PIN wires, and are both formed and arranged radially outward. This innermost same-layer and radially outward arrangement, on the one hand, utilizes the space near the axis inside the core to increase the number of winding turns and improve the electromagnetic induction capability; on the other hand, it does not occupy the inner diameter channel of the core, ensuring the installation space of other components, making the arrangement of the entire stator winding 11 more compact, maintaining the simplicity and efficiency of the internal structure of the motor.

[0042] Preferably, the U-shaped end 24 includes a first inclined section 241, a cross-layer section 242, and a second inclined section 243 which are sequentially connected, the first inclined end is connected to the first straight section 23, and the second inclined section 243 is connected to the second straight section 25. This multi-section structural design of the U-shaped end 24 can flexibly adapt to the transition between different layers of the stator core 10, ensure the smoothness of the PIN wire from the straight section to the U-shaped bend, reduce stress concentration, prevent the PIN wire from breaking at the bend, improve the mechanical strength and reliability of the winding, and optimize space utilization to avoid interference with other components.

[0043] Specifically, the cross-layer segment 242 realizes a smooth transition of the PIN wire between different radial layers of the stator core 10, avoiding the line bending dead angle caused by inter-layer jumping. This makes the internal current transmission of the PIN wire smoother, reduces the problem of increased local resistance caused by excessive bending, thereby reducing power loss and improving the electrical efficiency of the motor. On the other hand, in terms of spatial layout, it cleverly utilizes the tiny gaps between the layers of the stator core 10, so that the PIN wire can be wound tightly around the core without reserving a large space to accommodate the abrupt bending structure, making the layout of the entire stator winding 11 more compact, improving space utilization, and facilitating the miniaturization of the motor.

[0044] Further preferably, the long-distance 6-6 layer PIN wire is extended with a plane section 244 at the position of the cross-layer section 242. The plane section 244 cooperates with the cross-layer section 242 to transitionally connect the first inclined section 241 and the second inclined section 243. The setting of the plane section 244 makes the stator axial height of the entire flat wire stator 1 at a relatively low level. The addition of the plane section 244 effectively reduces the axial fluctuation of the PIN wire, avoids the excessive axial dimension caused by the bending of the U-shaped end 24, makes the flat wire stator 1 more compact in the axial structure, is conducive to the overall flattening design of the motor, meets the needs of some application scenarios with strict restrictions on the space height, and expands the scope of application of the motor.

[0045] Specifically, the setting of the plane section 244 is of great significance for optimizing the axial structure of the flat wire stator 1. The plane section 244 cooperates with the cross-layer section 242 to transitionally connect the first inclined section 241 and the second inclined section 243. The most intuitive effect is that the axial height of the stator of the entire flat wire stator 1 is at a relatively low level. In some application scenarios with strict restrictions on space height, such as the electric drive system of new energy vehicles and small power units in aerospace equipment, every reduction in the axial dimension can free up valuable installation space for other key components. Moreover, a lower axial height also means that the center of gravity of the motor as a whole is lower, which can reduce the vibration and shaking caused by the high center of gravity during operation, enhance the stability of the motor operation, further reduce noise generation, and improve the overall reliability of the equipment.

[0046] Preferably, see Figures 7 to 10 , the long-distance 6-6 layer PIN line is provided with two U-shaped end 24 structures, one of which is Figure 7 and Figure 8 The cross-layer PIN line (line type 1) 20c in the embodiment of FIG. 1 is provided on one side of the cross-layer segment 242 close to the first oblique line segment; Fig. 9 and Fig.10 The 6-6 layer PIN wire (line type two) 20d, in which the cross-layer segment 242 is arranged close to one side of the second oblique segment, provides two U-shaped end 24 structures, which provides more process options for PIN wire winding. It can be flexibly matched according to the specific size, winding space and electromagnetic performance requirements of the stator core 10, optimizes the adaptability of the winding and the core, and further enhances the flexibility and customization ability of the motor design to meet diverse market demands.

[0047] Specifically, the advantages of line type 1 or even line type 2 are that when the slot space on the side of the stator core 10 close to the oblique line segment is relatively abundant, selecting this line type can make full use of the space on this side. It makes the transition from the first straight line segment 23 in the PIN line to the cross-layer segment 242 more natural and smooth, reduces the risk of line interference, and is particularly suitable for situations where the opening direction or internal structure of the slot makes one side more convenient for winding operations, thereby improving the winding efficiency.

[0048] Furthermore, the flat wire stator 1 in the present application document is combined with the PIN wire of the line type 1 and the line type 2, so that the PIN wire can perfectly adapt to the stator core 10 of different shapes and different internal layouts, whether the wire slot opening is irregular or there is a complex installation structure around the core, it can ensure that the winding is tightly and orderly wound, and maximize the space utilization of the stator core 10. Further, the line type 1 optimizes the current path and enhances the electromagnetic induction effect based on the magnetic field distribution characteristics of the wire slot of the cross-layer segment 242 close to the first oblique line segment area, and cooperates with the line type 2 to adjust the cross-layer direction of the second oblique line segment through the cross-layer segment 242, so as to optimize the magnetic field uniformity from multiple angles.

[0049] Preferably, a motor is also provided, comprising: a motor rotor; a motor stator, the motor stator being connected to the motor rotor, and the motor stator being specifically a flat wire stator 1 as described above, so that the motor has the beneficial effects of any of the flat wire stators 1 described above, which will not be described in detail here.

[0050] 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 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 stator winding includes a three-phase winding, and the three-phase winding includes a plurality of coils. The plurality of coils are wound in the stator slots, and each stator slot is provided with an even number of layers of PIN wires, and the lead-in wires and lead-out wires 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 of the stator core.

2. 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.

3. The flat wire stator according to claim 2, characterized in that: Each phase of the three-phase winding includes a first branch, a second branch and a third branch, and each branch is 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 wire is arranged in sequence from the outer side to the inner side along the radial direction of the stator core as follows: a PIN wire spanning 1-1 layers with a full pitch, a PIN wire spanning 2-3 layers with a full pitch, a PIN wire spanning 4-5 layers with a full pitch, a PIN wire spanning 6-6 layers with a long pitch, and a PIN wire spanning 6-6 layers with a short pitch, and the PIN wire includes a first welding end, a first twist section, a first straight section, a U-shaped end, a second straight section, a second twist section, and a second welding end connected in sequence.

4. The flat wire stator according to claim 1, characterized in that: The stator core comprises a U-shaped side and a welding side, and the welding ends of the lead-in wire and the lead-out wire are arranged on the same side and are located on the welding side of the stator core.

5. The flat wire stator according to claim 3, characterized in that: The first twisting section and the second twisting section in the full-distance 1-1 layer PIN line, the long-distance 6-6 layer PIN line and the short-distance 6-6 layer PIN line all twist in the same direction; The first twist section and the second twist section of the full-pitch PIN line spanning 2-3 layers and the full-pitch PIN line spanning 4-5 layers both twist in opposite directions, respectively twisting toward both sides away from the center.

6. The flat wire stator according to claim 3, characterized in that: The long-distance PIN line spanning 6-6 layers and the short-distance PIN line spanning 6-6 layers are arranged as the innermost PIN lines of the same layer, and are both formed and arranged radially toward the outer side.

7. The flat wire stator according to claim 3, characterized in that: The U-shaped end includes a first inclined segment, a cross-layer segment and a second inclined segment which are sequentially connected. The first inclined end is connected to the first straight segment, and the second inclined segment is connected to the second straight segment.

8. The flat wire stator according to claim 7, characterized in that: The long-distance 6-6 layer PIN line is extended with a plane section at the cross-layer section position, and the plane section cooperates with the cross-layer section to transitionally connect the first inclined section and the second inclined section.

9. The flat wire stator according to claim 8, characterized in that: The long-distance 6-6 layer PIN line is provided with two U-shaped end structures, one of which is provided on the side of the cross-layer segment close to the first oblique line segment; The other is arranged on a side of the cross-layer segment close to the second oblique line segment.

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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