Cross-layer outgoing line winding structure, stator assembly and motor

Abstract

The invention relates to a cross-layer outgoing line winding structure, a stator assembly and a motor, an iron core piece is provided with Z conductor grooves at equal intervals along the circumferential direction, the winding structure comprises three phases of winding circuits, and the winding circuit of any phase comprises two winding branches; and when Z / 6 is an odd number, the second winding branch is subjected to wire incoming from the first layer, then sequentially wound, then wound in the nth layer again, then sequentially wound, and then sequentially circulated until the last circulating winding process, and in the last circulating winding process, when the second winding branch is sequentially wound from the nth layer, the second winding branch is wound in the nth layer. A cross-layer wire is directly wound in an nth layer from a first layer layer by layer and then is sequentially wound, and the wire is discharged from the first layer. The incoming and outgoing line positions of the three-phase lap winding structure are more concentrated, the size of the small busbar assembly can be reduced, the preparation difficulty of the small busbar assembly can be reduced, and meanwhile, the risk that the busbar assembly fails due to vibration when the motor works can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a cross-layer winding structure, a stator assembly and a motor. Background Art

[0002] The motor can be used as one of the components of the power system of new energy vehicles, and its stator assembly can include an iron core and a three-phase winding structure wound on the iron core, that is, the winding structure includes winding circuits of three phases. In the process of motor development, the number of parallel winding branches of the winding circuit of each phase is often adjusted to be compatible with the development of high-voltage motors and low-voltage motors at the same time. At this time, the winding structure can adopt a stacking winding method. The three-phase stacked winding structure in the prior art can adopt a centralized input and output line solution to reduce the size of the busbar assembly and reduce the risk of failure due to vibration during motor operation. However, in the existing three-phase stacked winding structure, the input and output positions of several winding branches of any phase are only set adjacent to each other, and the effect of centralized input and output lines still needs to be further improved. Summary of the invention

[0003] Based on this, the present application provides a cross-layer winding structure, a stator assembly and a motor to improve the problem in the prior art that the effect of concentrated input and output wires of the three-phase stacked winding structure needs to be improved.

[0004] In a first aspect, the present application provides a cross-layer outgoing winding structure, the cross-layer outgoing winding structure is used for a stator assembly, the number of phases of the stator assembly is three phases, the number of poles is 2p, the stator assembly further comprises an iron core member, the iron core member is provided with Z conductor slots at equal intervals along the circumferential direction, wherein Z is a natural number that is an integer multiple of 6, any of the conductor slots is provided with n slot layers, wherein n is an even number not less than 4, the 1st, 2nd...nth layers of the conductor slots are arranged sequentially from the outside to the inside, the cross-layer outgoing winding structure comprises winding circuits of three phases, the winding circuit of any phase comprises two parallel winding branches, any winding branch adopts a stacked winding method, and comprises a plurality of stacked coils;

[0005] When Z / 6 is an odd number, in the two winding branches of any phase, the first winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then it is cycled in sequence until the wire comes out from the nth layer; the second winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then it is cycled in sequence. Then, the circuit is circulated successively until the last winding process. In the last winding process, when the second winding branch is wound on the n-1...2, 1 layers in the nth layer, it is directly wound from the 1st layer to the nth layer layer by layer through the cross-layer line, and then wound on the n-1...2, 1 layers in sequence, and the wires are led out from the 1st layer, so that the wire entry positions of the two winding branches of the same phase are respectively the 1st layers of two consecutive conductor slots, and the wire exit positions are respectively the 1st layers and nth layers of the same conductor slot;

[0006] When Z / 6 is an even number, in the two winding branches of any phase, the first winding branch enters the wire from the 1st layer, and is then wound in the 2nd, 3rd, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1th ... 2nd, 1st layers in sequence, and then cycles in sequence until the wire comes out from the 1st layer; the second winding branch enters the wire from the 1st layer, and is then wound in the 2nd, 3rd ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1th ... 2, 1 layer, and then circulate in sequence until the last winding process. In the last winding process, when the second winding branch is wound from the 1st layer to the 2nd, 3rd...nth layer in sequence, it is directly wound from the nth layer to the 1st layer through the cross-layer line, and then is wound in the 2nd, 3rd...nth layer in sequence, and the line is led out from the nth layer, so that the incoming line position of the two winding branches of the same phase is the 1st layer of two consecutive conductor slots, and the outgoing line position is the 1st and nth layers of the same conductor slot.

[0007] In one embodiment, the cross-layer line includes a cross-layer welding end and a cross-layer connecting line. There are two cross-layer welding ends, which are respectively arranged close to the 1st layer and the nth layer of the conductor slot. The cross-layer connecting line is connected between the two cross-layer welding ends.

[0008] In one embodiment, the lapped coil includes a lapped effective edge, a lapped welding end and a lapped hairpin end. The lapped effective edge is arranged in the conductor slot, and there are two lapped effective edges. The two lapped effective edges are arranged at intervals. The lapped welding end is connected to the lapped effective edges one by one. The two lapped welding ends are arranged at the same end of the two lapped effective edges and extend in a direction approaching each other. The lapped hairpin end is connected between the other ends of the two lapped effective edges.

[0009] In one of the embodiments, the two cross-layer welding ends of the cross-layer line are respectively connected to one of the stacked welding ends of the stacked coil, so that the cross-layer line connects the two stacked coils, and the two stacked welding ends connected to the two cross-layer welding ends of the cross-layer line extend in a direction approaching each other.

[0010] In one of the embodiments, any winding branch also includes a connecting coil, and a plurality of the stacked coils of any winding branch form a plurality of stacked windings. The cross-layer line connects the last two stacked windings of the second winding branch, and the connecting coil connects the other two consecutive stacked windings. The connecting coil includes a connecting effective edge, a connecting welding end, and a connecting hairpin end. The connecting effective edge is arranged in the conductor slot, and there are two of them. The two connecting effective edges are arranged at intervals, and the connecting welding ends are connected to the connecting effective edges one by one. The two connecting welding ends are arranged at the same end of the two connecting effective edges and extend in the same direction. The connecting hairpin end is connected between the other ends of the two connecting effective edges.

[0011] In one embodiment, Z=54, P=3, n=8, the three phases of the stator assembly are U phase, V phase and W phase, the winding circuits of the V phase and the W phase are obtained by translating the winding circuit of the U phase by 6 and 12 conductor slots respectively, and the first winding branch of the U phase is:

[0012] 1.1-10.2-1.3-10.4-1.5-10.6-1.7-10.8-19.8-10.7-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-20.7-29.8-38.8-29.7-38.6-29.5-38.4-29.3-38.2-29.1-21.1-30.2-21.3-30.4- 21.5-30.6-21.7-30.8-39.8-30.7-39.6-30.5-39.4-30.3-39.2-30.1-38.1-47.2-38.3-47.4-38.5-47.6-38.7-47.8-1.8-46.7-1.6-46.5-1.4-46.3-1.2-46.1-39.1-48.2-39.3-48.4-39.5-48.6-39.7-48.8;

[0013] The second winding branch of the U phase is:

[0014] 2.1-11.2-2.3-11.4-2.5-11.6-2.7-11.8-20.8-11.7-20.6-11.5-20.4-11.3-20.2-11.1-3.1-12.2-3.3-12.4-3.5-12.6-3.7-12.8-21.8-12.7-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4- 19.5-28.6-19.7-28.8-37.8-28.7-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3-46.4-37.5-46.6-37.7-46.8-2.8-47.7-2.6-47.5-2.4-47.3-2.2-47.1-3.8-48.7-3.6-48.5-3.4-48.3-3.2-48.1.

[0015] In one of the embodiments, the cross-layer outgoing winding structure further includes phase copper bars, which correspond one-to-one to the three phases of the stator assembly, and the phase copper bars are connected to the incoming line positions of the two winding branches of the corresponding phases.

[0016] In one of the embodiments, the cross-layer outgoing line winding structure further includes a star point copper bar, and the star point copper bar is connected to the outgoing line positions of a total of 6 winding branches of three phases.

[0017] In a second aspect, the present application provides a stator assembly, wherein the stator assembly includes any one of the cross-layer winding structures provided in the present application.

[0018] In a third aspect, the present application provides a motor, comprising any one of the stator assemblies provided in the present application.

[0019] The present application reasonably arranges the cross-layer mode of the two parallel winding branches of any phase in the three-phase stacked winding structure, that is, the first winding branch adopts the winding mode of layer-by-layer cyclic winding, and the second winding branch directly crosses from the innermost layer to the outermost layer or directly crosses from the outermost layer to the innermost layer through the cross-layer line in the last cyclic winding, so that the incoming line positions of the two winding branches of the same phase can be the first layer of two consecutive conductor slots respectively, and the outgoing line positions can be the first layer and the nth layer of the same conductor slot respectively, thereby making the incoming and outgoing line positions of the three-phase stacked winding structure more concentrated; when the busbar assembly is subsequently prepared to be reduced, the present application can reduce its size and reduce its preparation difficulty, and at the same time can reduce the risk of failure of the busbar assembly due to vibration during motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A schematic diagram of the structure of a stator assembly to which the cross-layer winding structure provided in the first embodiment of the present application is applicable;

[0021] Figure 2 A schematic diagram of a conductor slot layer of a stator assembly to which the cross-layer winding structure provided in Embodiment 1 of the present application is applicable;

[0022] Figure 3 A winding circuit diagram of a cross-layer winding structure provided in Example 1 of the present application;

[0023] Figure 4 A winding circuit diagram of the first winding branch of the U phase of the cross-layer outgoing winding structure provided in the first embodiment of the present application;

[0024] Figure 5 A winding circuit diagram of the second winding branch of the U phase of the cross-layer outgoing winding structure provided in the first embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of a cross-layer wire of a cross-layer output winding structure provided in the first embodiment of the present application;

[0026] Figure 7 A schematic structural diagram of a stacked coil with a cross-layer winding structure provided in the first embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of the connection coil of the cross-layer winding structure provided in the first embodiment of the present application;

[0028] Fig. 9 This is a schematic structural diagram of the star-point copper busbar of the cross-layer winding structure provided in Example 1 of the present application.

[0029] Figure numerals: 100, stacked coil; 110, stacked effective edge; 120, stacked welding end; 130, stacked hairpin end; 200, cross-layer line; 210, cross-layer welding end; 220, cross-layer connecting line; 300, connecting coil; 310, connecting effective edge; 320, connecting welding end; 330, connecting hairpin end; 400, core member; 410, conductor slot; 500, phase copper busbar; 600, star point copper busbar; 610, copper busbar member; 620, star point terminal. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0032] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0033] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] Embodiment 1

[0035] Embodiment 1 of the present application provides a cross-layer winding structure, such as Figures 1 to 9 As shown, the cross-layer outgoing winding structure is used for a stator assembly, the number of phases of the stator assembly is three phases, the number of poles is 2p, the stator assembly also includes an iron core 400, the iron core 400 is provided with Z conductor slots 410 at equal intervals along the circumferential direction, wherein Z is a natural number that is an integer multiple of 6, any conductor slot 410 is provided with n slot layers, wherein n is an even number not less than 4, the 1st, 2nd ... nth layers of the conductor slot 410 are arranged sequentially from the outside to the inside, the cross-layer outgoing winding structure includes winding circuits of three phases, the winding circuit of any phase includes two parallel winding branches, any winding branch adopts a stacked winding method, and includes a plurality of stacked coils 100;

[0036] When Z / 6 is an odd number, in the two winding branches of any phase, the first winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then cycles in sequence until the wire comes out from the nth layer; the second winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence. , and then circulate in sequence until the last winding process. In the last winding process, when the second winding branch is wound on the n-1...2, 1 layers in sequence from the nth layer, it is directly wound from the 1st layer to the nth layer through the cross-layer line 200, and then wound on the n-1...2, 1 layers in sequence, and the wires are led out from the 1st layer, so that the incoming positions of the two winding branches of the same phase are the 1st layers of two consecutive conductor slots 410, and the outgoing positions are the 1st and nth layers of the same conductor slot 410;

[0037] When Z / 6 is an even number, in the two winding branches of any phase, the first winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then it is circulated in sequence until the wire comes out from the first layer; the second winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then This cycle is repeated until the last winding cycle. In the last winding cycle, when the second winding branch is wound from the 1st layer to the 2nd, 3rd, ...nth layers, it is directly wound from the nth layer to the 1st layer layer by layer through the cross-layer line 200, and then is wound on the 2nd, 3rd, ...nth layers in sequence, and the wires are led out from the nth layer, so that the incoming positions of the two winding branches of the same phase are the 1st layers of two consecutive conductor slots 410, and the outgoing positions are the 1st and nth layers of the same conductor slot 410, respectively.

[0038] like Figure 1 and Figure 2As shown, in this embodiment, it is exemplarily explained that the number of pole pairs of the stator assembly can be p, that is, the stator assembly includes p pairs of magnetic poles, where p is a positive integer, such as p=1, 2 or 3. The stator assembly can specifically include a core member 400 and a winding structure wound on the core member 400, wherein the core member 400 can include a plurality of stator punchings, and the plurality of stator punchings can be prepared by stacking. The core member 400 can be cylindrical and can be hollow, and Z conductor slots 410 can be arranged at equal intervals along its circumference on its inner side, and at least part of the winding structure is wound in the conductor slot 410; wherein Z is a natural number that is an integer multiple of 6, such as Z=36, 48 or 54. According to the distribution of the winding structure in the conductor slot 410, the conductor slot 410 can be divided into n slot layers along the radial direction of the core member 400, wherein n is an even number not less than 4, such as n=4, 6 or 8. Meanwhile, the first, second, ... nth layers of the conductor slot 410 are arranged in sequence from outside to inside, that is, the first layer of the conductor slot 410 is located at the outermost side, and the nth layer of the conductor slot 410 is located at the innermost side.

[0039] like Figure 3 As shown, in this embodiment, the winding structure wound on the core member 400 is a cross-layer winding structure, which includes three-phase winding circuits, and the winding circuit of any phase includes two parallel winding branches, and any winding branch includes a plurality of stacked coils 100, and the plurality of stacked coils 100 are wound in a stacked manner to form a three-phase stacked winding.

[0040] like Figure 4 and Figure 5 As shown, during the winding process, the two winding branches of any phase are wound in a specific cross-layer manner. In this embodiment, when the winding branch is wound layer by layer from the outermost to the innermost, that is, from the 1st layer to the nth layer; or when the winding branch is wound layer by layer from the innermost to the outermost, that is, from the nth layer to the 1st layer, it can be regarded as a single cycle winding of the winding branch. When Z / 6 is an odd number, any winding branch undergoes an odd number of cycles of winding. If it enters the wire from the 1st layer, it should exit the wire from the nth layer; and when Z / 6 is an even number, any winding branch undergoes an even number of cycles of winding. If it enters the wire from the 1st layer, it should exit the wire from the 1st layer.

[0041] like Figure 4 As shown, in the two winding branches of any phase, when Z / 6 is an odd number, for example Z=54, the first winding branch enters the line from the 1st layer, and is then wound in the 2nd, 3rd, ... nth layers in sequence, completing one cycle winding; then it is wound again in the nth layer, and then it is wound in the n-1...2nd, 1st layers in sequence, completing another cycle winding; then it circulates in sequence until the line comes out from the nth layer, completing an odd number of cycle windings.

[0042] like Figure 5 As shown, the second winding branch enters the first layer, and then is wound in the second, third, and nth layers in sequence, that is, one cycle winding is completed; then it is wound in the nth layer again, and then it is wound in the n-1, second, and first layers in sequence, that is, another cycle winding is completed; then it is cycled in sequence until the last cycle winding process. It is not difficult to understand that in the penultimate cycle winding process, the second winding branch undergoes an even number of cycle windings, which is wound from the nth layer to the n-1, second, and first layers in sequence. In particular, in the last cycle winding process, the second winding branch no longer continues to be wound from the first layer, but is directly wound from the first layer of the penultimate cycle winding to the nth layer through the cross-layer line 200 to start the last cycle winding, and then is wound in the n-1, second, and first layers in sequence, and the wire comes out from the first layer.

[0043] In this embodiment, the aforementioned winding method is adopted so that the incoming positions of the two winding branches of the same phase can be the first layer of two consecutive conductor slots 410 respectively, and the outgoing positions can be the first layer and the nth layer of the same conductor slot 410 respectively.

[0044] When Z / 6 is an even number, for example Z=54, the first winding branch enters the line from the 1st layer, and is then wound in the 2nd, 3rd, ... nth layers in sequence, completing one cycle of winding; then it is wound again in the nth layer, and then in the n-1...2nd, 1st layers in sequence, completing another cycle of winding; then it circulates in sequence until the line comes out from the 1st layer, completing an even number of cycle windings.

[0045] The second winding branch enters the wire from the 1st layer, and then is wound in the 2nd, 3rd, ... nth layers in sequence, that is, one cycle winding is completed; then it is wound again in the nth layer, and then it is wound in the n-1th ... 2nd, 1st layers in sequence, that is, another cycle winding is completed; then it is cycled in sequence until the last winding process. It is not difficult to understand that in the penultimate cycle winding process, the second winding branch undergoes an even number of cycle windings, which is wound from the 1st layer to the 2nd, 3rd ... nth layers in sequence. In particular, in the last cycle winding process, the second winding branch no longer continues to be wound from the nth layer, but is directly wound from the nth layer of the penultimate cycle winding to the 1st layer through the cross-layer line 200 to start the last cycle winding, and then is wound in the 2nd, 3rd ... nth layers in sequence, and the wire comes out from the nth layer.

[0046] Similarly, using the aforementioned winding method, the inlet positions of the two winding branches of the same phase can still be the first layer of two consecutive conductor slots 410 respectively, and the outlet positions can still be the first layer and the nth layer of the same conductor slot 410 respectively.

[0047] In summary, the present application reasonably sets the cross-layer mode of the two parallel winding branches of any phase in the three-phase stacked winding structure, that is, the first winding branch adopts a layer-by-layer cyclic winding mode, and the second winding branch directly crosses from the innermost layer to the outermost layer or directly from the outermost layer to the innermost layer through the cross-layer line 200 during the last cyclic winding, so that the incoming line positions of the two winding branches of the same phase can be the first layer of two consecutive conductor slots 410 respectively, and the outgoing line positions can be the first layer and the nth layer of the same conductor slot 410 respectively, thereby making the incoming and outgoing line positions of the three-phase stacked winding structure more concentrated; when the busbar assembly is subsequently prepared to be reduced, the present application can reduce its size and reduce its preparation difficulty, and at the same time can reduce the risk of failure of the busbar assembly due to vibration during motor operation.

[0048] Specifically, the cross-layer line 200 includes a cross-layer welding end 210 and a cross-layer connecting line 220 . There are two cross-layer welding ends 210 , which are respectively arranged close to the 1st layer and the nth layer of the conductor slot 410 . The cross-layer connecting line 220 is connected between the two cross-layer welding ends 210 .

[0049] like Figure 5 and Figure 6 As shown, in this embodiment, it is exemplarily explained that the winding circuits of the three phases are specifically in a structure similar to a rotating body after winding is completed, which is coaxially arranged with the iron core member 400, and its two ends extend beyond the two ends of the iron core member 400. The cross-layer wire 200 can be specifically arranged on one end surface of the winding circuits of the three phases to facilitate its routing, thereby realizing the cross-layer connection of the winding branch from the innermost side to the outermost side or from the outermost side to the innermost side.

[0050] In this embodiment, the cross-layer wire 200 can be prepared in an integrated manner, and specifically can be made of the same material as the stacked coil 100 of the winding structure, such as a flat enameled wire, and the enameled wire can include a copper wire and an insulating material wrapped outside the copper wire. The cross-layer wire 200 can include a cross-layer welding end 210 and a cross-layer connecting wire 220, wherein the cross-layer welding end 210 is set to two, and the two cross-layer welding ends 210 are respectively connected to the first layer of the second-to-last cycle winding of the second winding branch and the nth layer of the last cycle winding, or respectively connected to the nth layer of the second-to-last cycle winding of the second winding branch and the first layer of the last cycle winding. The cross-layer connecting wire 220 connects the two cross-layer welding ends 210 so that the winding branch can be wound continuously.

[0051] It can be understood that this embodiment, by reasonably arranging the structure of the cross-layer wire 200, facilitates the cross-layer connection of the winding branch from the innermost to the outermost or from the outermost to the innermost, thereby obtaining the desired cross-layer output winding structure.

[0052] More specifically, the lapped coil 100 includes a lapped effective edge 110, a lapped welding end 120 and a lapped hairpin end 130. The lapped effective edge 110 is arranged in the conductor slot 410, and there are two lapped effective edges 110. The two lapped effective edges 110 are arranged at intervals. The lapped welding ends 120 are connected to the lapped effective edges 110 one by one. The two lapped welding ends 120 are arranged at the same end of the two lapped effective edges 110 and extend in a direction approaching each other. The lapped hairpin end 130 is connected between the other ends of the two lapped effective edges 110.

[0053] like Figure 7 As shown, in this embodiment, it is exemplarily explained that the stacked coil 100 can also be prepared in an integrated manner. When the stacked coil 100 is prepared from a flat enameled wire, the stator assembly is suitable for a flat wire motor. The stacked coil 100 may include two stacked effective edges 110, two stacked welding ends 120 and one stacked hairpin end 130, wherein the stacked effective edges 110 are all arranged in the conductor slot 410 and arranged in one of the slot layers of the conductor slot 410. The two stacked effective edges 110 of the stacked coil 100 are arranged at intervals, and the number of conductor slots 410 spaced between the two stacked effective edges 110 is the pitch of the stacked coil 100. The two stacked welding ends 120 are respectively arranged at the same end of the two stacked effective edges 110, and the two stacked welding ends 120 extend obliquely in a direction close to each other. The lapped hairpin end 130 connects the other ends of the two lapped effective edges 110, and can be set to a shape similar to a "V", and the tip of the "V" can face the outside of the stator core. When two lapped coils 100 are connected, the two lapped coils 100 are connected through one of their lapped welding ends 120, and the two lapped welding ends 120 can be fixed by welding. It is not difficult to see that the two ends of the winding circuit of the three phases extending to the outside of the stator core are respectively composed of the lapped welding ends 120 of a plurality of lapped coils 100 and the lapped hairpin end 130.

[0054] It can be understood that, in this embodiment, by reasonably arranging the structure of the stacked coil 100 , it is convenient to stack a plurality of stacked coils 100 , and then to obtain the desired cross-layer winding structure.

[0055] More specifically, the two cross-layer welding ends 210 of the cross-layer wire 200 are respectively connected to a stacking welding end 120 of a stacked coil 100, so that the cross-layer wire 200 connects the two stacking coils 100, and the two stacking welding ends 120 connected to the two cross-layer welding ends 210 of the cross-layer wire 200 extend in a direction approaching each other.

[0056] like Figure 1 and Figure 5As shown, in this embodiment, it is exemplified that the cross-layer wire 200 can be used to connect two stacked coils 100. In the two stacked coils 100, the cross-layer mode of the two stacked effective sides 110 of one stacked coil 100 should be the n-1th layer and the nth layer, and the cross-layer mode of the two stacked effective sides 110 of the other stacked coil 100 should be the 1st layer and the 2nd layer. When the cross-layer wire 200 is connected to the two stacked coils 100, its two cross-layer welding ends 210 can be respectively connected to the stacked welding ends 120 corresponding to the 1st layer and the stacked welding ends 120 corresponding to the nth layer of the two stacked coils 100, and the connection method of welding and fixing can still be adopted when connecting. The stacked welding ends 120 corresponding to the 1st layer and the stacked welding ends 120 corresponding to the nth layer also extend in a direction close to each other, so that the two cross-layer welding ends 210 are adjacent to each other along the circumferential direction of the core member 400.

[0057] It can be understood that in this embodiment, the two stacked welding ends 120 extending in a direction approaching each other in two stacked coils 100 are connected by a cross-layer wire 200, so that the span of the cross-layer wire 200 along the circumferential direction of the core member 400 can be relatively small, so that the cross-layer wire 200 has a relatively small size, and thus the preparation and processing process of the cross-layer wire 200 can be made more convenient, and at the same time, the connection of the cross-layer wire 200 in the winding branch can be made less likely to fail due to vibration.

[0058] More specifically, any winding branch also includes a connecting coil 300, and the several stacked coils 100 of any winding branch form a several stacked windings. The cross-layer line 200 connects the last two stacked windings of the second winding branch. The connecting coil 300 connects the other two consecutive stacked windings. The connecting coil 300 includes a connecting effective edge 310, a connecting welding end 320 and a connecting hairpin end 330. The connecting effective edge 310 is arranged in the conductor slot 410, and there are two of them. The two connecting effective edges 310 are arranged at intervals. The connecting welding ends 320 are connected to the connecting effective edges 310 one by one. The two connecting welding ends 320 are arranged at the same end of the two connecting effective edges 310 and extend in the same direction. The connecting hairpin end 330 is connected between the other ends of the two connecting effective edges 310.

[0059] like Figure 8As shown, in this embodiment, it is exemplified that any winding branch also includes a connecting coil 300, and the connecting coil 300 can also be prepared in an integrated manner, and can also be made of a flat enameled wire. The connecting coil 300 also has two effective sides arranged in the conductor slot 410, namely, the connecting effective sides 310, and the number of conductor slots 410 spaced between the two connecting effective sides 310 is the pitch of the connecting coil 300. The connecting coil 300 also includes two connecting welding ends 320, and the two connecting welding ends 320 are respectively connected to the same end of the two connecting effective sides 310, and extend in the same direction. The connecting coil 300 also includes a connecting hairpin end 330, and the connecting hairpin end 330 can also be set to a shape similar to a "V" shape, and is connected between the other ends of the two connecting effective sides 310. When each winding branch is stacked, it forms a plurality of stacked windings. The connecting coil 300 is used to connect two consecutive stacked windings, and is specifically connected to two stacked coils 100. When connected, the two connecting welding ends 320 of the connecting coil 300 are respectively connected to one lap-wound welding end 120 of a lap-wound coil 100, and the connection method can still be welding fixation. It is not difficult to see that since the lap-wound coil 100 and the connecting coil 300 both include two effective sides, and the number of slot layers n of the conductor slot 410 is an even number, any winding branch can be fed with the lap-wound coil 100, and in addition to including a number of lap-wound coils 100 during the cyclic winding process, it can also include a connecting coil 300, and any winding branch can be fed with the lap-wound coil 100. It should be noted that since the last cyclic winding of the second winding branch of any phase adopts a cross-layer winding method through a cross-layer wire 200, in the second winding branch, the last two lap-wound groups are connected through the cross-layer wire 200 without the need to set a connecting coil 300.

[0060] It can be understood that, by providing the connecting coil 300 and by reasonably arranging the structure of the connecting coil 300, the present embodiment facilitates the first winding branch of any phase to be wound in a layer-by-layer loop with a plurality of stacked coils 100 and the connecting coil 300; and facilitates the second winding branch to be wound in a layer-by-layer loop with a plurality of stacked coils 100 and the connecting coil 300, and to continue winding in a layer-by-layer loop after crossing the layers with the cross-layer wire 200, thereby obtaining the desired cross-layer output winding structure.

[0061] More specifically, Z=54, P=3, n=8, the three phases of the stator assembly are U phase, V phase and W phase, the winding circuits of V phase and W phase are obtained by translating the winding circuit of U phase by 6 and 12 conductor slots 410 respectively, and the first winding branch of U phase is:

[0062] 1.1-10.2-1.3-10.4-1.5-10.6-1.7-10.8-19.8-10.7-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-20.7-29.8-38.8-29.7-38.6-29.5-38.4-29.3-38.2-29.1-21.1-30.2-21.3-30.4- 21.5-30.6-21.7-30.8-39.8-30.7-39.6-30.5-39.4-30.3-39.2-30.1-38.1-47.2-38.3-47.4-38.5-47.6-38.7-47.8-1.8-46.7-1.6-46.5-1.4-46.3-1.2-46.1-39.1-48.2-39.3-48.4-39.5-48.6-39.7-48.8;

[0063] The second winding branch of phase U is:

[0064] 2.1-11.2-2.3-11.4-2.5-11.6-2.7-11.8-20.8-11.7-20.6-11.5-20.4-11.3-20.2-11.1-3.1-12.2-3.3-12.4-3.5-12.6-3.7-12.8-21.8-12.7-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4- 19.5-28.6-19.7-28.8-37.8-28.7-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3-46.4-37.5-46.6-37.7-46.8-2.8-47.7-2.6-47.5-2.4-47.3-2.2-47.1-3.8-48.7-3.6-48.5-3.4-48.3-3.2-48.1.

[0065] In this embodiment, for example, this embodiment takes a three-phase stacked winding structure with 54 slots, 6 poles and 8 layers as an example. The marks "U", "V" and "W" are only for the convenience of describing the three phases of the stator assembly, and are not used to limit them. In some embodiments, the three phases of the stator assembly can also be represented by other marks. Similarly, the serial numbers "1"-"54" are also for the convenience of describing the 54 conductor slots 410 on the core member 400, and are not used to limit them. Any conductor slot 410 on the core member 400 can be used as the conductor slot 410 with the serial number "1".

[0066] like Figure 4 As shown, in this embodiment, the first winding branch of the U phase is taken as an example. The line corresponding to "1.1-10.2" represents the first lapped coil 100, and its two lapped effective sides 110 are respectively arranged in the first layer of the conductor slot 410 with the serial number "1" and the second layer of the conductor slot 410 with the serial number "10", and the pitch is 9 slots; at the same time, it means that the first winding branch of the U phase is fed from the first layer of the conductor slot 410 with the serial number "1", and the first layer of the conductor slot 410 with the serial number "10" is connected to the conductor slot 410 with the serial number "10". Figure 3 and Figure 4 The subsequent winding lines are similar, where "1.7-10.8" represents the first connected coil 300, whose two connected effective sides 310 are respectively arranged in the 7th layer of the conductor slot 410 with the serial number "1" and the 8th layer of the conductor slot 410 with the serial number "10", and the pitch is 9 slots.

[0067] The circuit corresponding to "1.1-10.2-1.3-10.4-1.5-10.6" is the first stacked winding, and the circuit corresponding to "19.8-10.7-19.6-10.5-19.4-10.3-19.2-10.1" is the second stacked winding. The two stacked windings are connected through the connecting coil 300 corresponding to "1.7-10.8". It is not difficult to see that "1.1-10.2-1.3-10.4-1.5-10.6-1.7-10.8" corresponds to the first cycle winding, which includes three stacked coils 100 and one connecting coil 300;

[0068] “19.8-10.7-19.6-10.5-19.4-10.3-19.2-10.1” corresponds to the second cycle winding, which includes four stacked coils 100 .

[0069] At the same time, the line corresponding to "39.7-48.8" indicates the last lapped coil 100, whose two lapped effective sides 110 are arranged in the 7th layer of the conductor slot 410 with the serial number "39" and the 8th layer of the conductor slot 410 with the serial number "48", respectively, and the pitch is 9 slots; at the same time, it indicates that the first winding branch of the U phase is connected to the 8th layer of the conductor slot 410 with the serial number "48", referring to Figure 3 and Figure 4 X1 in.

[0070] like Figure 5 As shown, the second winding branch of the U phase is similar, wherein the line corresponding to "2.1-11.2" is the first stacked coil 100, which also indicates that the second winding branch of the U phase is the first layer of the conductor slot 410 with the serial number "2", referring to Figure 3 and Figure 5and "3.2-48.1" corresponds to the last lapped coil 100, which also indicates that the second winding branch of the U phase is the first layer of the conductor slot 410 with the serial number "48", as shown in FIG. Figure 3 and Figure 5 It is not difficult to see that the first winding branch and the second winding branch of the U phase enter the first layer of two consecutive conductor slots 410 and exit the eighth layer of the same conductor slot 410 .

[0071] like Figure 3 As shown, in this embodiment, the winding circuits of the V phase and the W phase can be obtained by translating the winding circuit of the U phase by 6 and 12 conductor slots 410 respectively, which can ensure the balance between the three phases. Based on this, the two winding branches of the V phase are connected to the lines corresponding to "7.1" and "8.1" respectively. Figure 3 V1 and V2 in the diagram; at the same time, the two winding branches of phase V are connected by the lines corresponding to "54.8" and "54.1", refer to Figure 3 The two winding branches of phase W are connected by the lines corresponding to "13.1" and "14.1" respectively. Figure 3 W1 and W2 in the figure; at the same time, the two winding branches of phase W are connected by the lines corresponding to "6.8" and "6.1" respectively, refer to Figure 3 Z1 and Z2 in .

[0072] Specifically, the cross-layer outgoing winding structure further includes a phase copper bar 500, which corresponds to the three phases of the stator assembly one by one, and the phase copper bar 500 is connected to the incoming line positions of the two winding branches of the corresponding phase.

[0073] like Figure 3As shown, in this embodiment, the cross-layer outgoing winding structure also includes a phase copper bar 500 that connects two winding branches of the same phase in parallel. Three phase copper bars 500 can be provided, and the three phase copper bars 500 correspond to the three phases of the stator assembly one by one. When connected, the phase copper bar 500 is connected to the incoming line positions of the two winding branches of the corresponding phase. For example, the phase copper bar 500 corresponding to U is connected to the aforementioned U1 and U2, and U1 and U2 correspond to the stacked hairpin ends 130 of the stacked coil 100. It is not difficult to understand that since U1 and U2 are the first layers of two continuous conductor slots 410, respectively, the phase copper bar 500 can even be a simple arc-shaped bar extending circumferentially along the core member 400, and its material can specifically be a flat enameled wire. Under this structure, the phase copper bar 500 is easy to prepare and process, and it can maintain a high stability after being installed and fixed. In some embodiments, the three phase copper bars 500 can also be prepared as an integral busbar assembly. For example, the three phase copper bars 500 are fixed together by injection molding material. Under the premise that the sizes of the three phase copper bars 500 are relatively small, the busbar assembly also has a relatively small size and a relatively simple structure.

[0074] Specifically, the cross-layer outgoing line winding structure further includes a star point copper bar 600, and the star point copper bar 600 is connected to the outgoing line positions of a total of 6 winding branches of three phases.

[0075] like Figure 3 and Fig. 9 As shown, in this embodiment, the cross-layer outgoing winding structure also includes a star point copper bar 600, which is used to connect the outgoing line positions of the winding lines of the three phases. The star point copper bar 600 can be set as one, and is connected to the outgoing line positions of the three phases, a total of 6 winding lines. The star point copper bar 600 can include a copper bar 610 and a star point terminal 620, wherein the star point terminal 620 can be set to 6, and corresponds to and is connected to the outgoing line positions of the 6 winding branches respectively. Referring to the aforementioned X1, X2, Y1, Y2, Z1 and Z2, X1, X2, Y1, Y2, Z1 and Z2 also correspond to the stacked hairpin end 130 of the stacked coil 100. The copper bar 610 connects the 6 copper bar terminals, which can be set as an arc segment and extends along the circumference of the core member 400. Meanwhile, the copper busbar 610 may also be disposed between the innermost side and the outermost side of the winding lines of the three phases.

[0076] It can be understood that, in this embodiment, by providing the star-point copper busbar 600, the outlet positions of the winding circuits of the three phases can be connected so that the cross-layer outlet winding structure forms a three-phase circuit; and since the two winding branches of any phase are outlet from the 1st and nth layers of the same conductor slot 410, the star-point copper busbar 600 can have a smaller span, and when it is connected to the winding circuits of the three phases, it can be stably, evenly and effectively supported at the innermost and outermost sides of the core member 400, thereby ensuring stability after installation and fixation.

[0077] It is not difficult to understand that, in some embodiments, the star point copper bar 600 can also be injection molded together with the three phase copper bars 500 to form a busbar assembly, for example, the injection material is divided into two sections, one of which extends between the three phase copper bars 500, and the other section is coated on the star point copper bar 600, and the two sections of injection material are integrally molded. In other embodiments, the three cross-layer wires 200 can also be injection molded in the busbar assembly, for example, the injection material is divided into one more section, and the section of injection material is used to coat the three cross-layer wires 200, so that the cross-layer wires 200 can be installed and arranged together with the phase copper bars 500 and the star point copper bar 600, thereby further reducing the difficulty of preparing the winding structure, while ensuring the stability of each welding position, so that it is not easy to fail due to vibration.

[0078] The implementation principle of a cross-layer winding structure provided in the first embodiment of the present application is as follows:

[0079] The core member 400 is prepared and formed, and then a plurality of stacked coils 100 and a connecting coil 300 are wound on the core member 400. When winding a winding branch of any phase, if Z / 6 is an odd number, the first winding branch enters the first layer, and then is wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then is circulated in sequence until the wire is output from the nth layer; the second winding branch enters the first layer, and then is wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence. In the last winding process, when the second winding branch is wound in layers n-1...2, 1 in sequence from the nth layer, it is directly wound in the nth layer from the first layer through the cross-layer line 200, and then wound in layers n-1...2, 1 in sequence, and the wire is discharged from the first layer, so that the inlet position of the two winding branches of the same phase is the first layer of two consecutive conductor slots 410, and the outlet position is the first layer and the second layer of the same conductor slot 410. nth layer; if Z / 6 is an even number, the first winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then wound again in the nth layer, and then wound in the n-1 ... 2nd, 1st layers in sequence, and then cycled in sequence until the wire comes out from the first layer; the second winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then wound again in the nth layer, and then wound in the n-1 ... 2nd, 1st layers in sequence, and then cycled in sequence , until the last cycle winding process, in the last cycle winding process, when the second winding branch is wound from the first layer to the 2nd, 3rd, ... nth layers in sequence, it is directly wound from the nth layer to the first layer layer by layer through the cross-layer wire 200, and then wound in the 2nd, 3rd, ... nth layers in sequence, and the wire is discharged from the nth layer, so that the incoming positions of the two winding branches of the same phase are the first layer of two consecutive conductor slots 410, respectively, and the outgoing positions are the first layer and the nth layer of the same conductor slot 410. The cross-layer wire 200 is installed and arranged together with the three phase copper bars 500 and the star point copper bar 600, and the cross-layer wire 200 is injection molded into one with the three phase copper bars 500 and the star point copper bar 600 through the injection molding material, and the phase copper bar 500 is connected to the incoming positions of the two winding branches of the corresponding phase, and the star point copper bar 600 is connected to the outgoing positions of the six winding branches of the three phases.

[0080] The present application reasonably arranges the cross-layer mode of the two parallel winding branches of any phase in the three-phase stacked winding structure, that is, the first winding branch adopts the winding mode of layer-by-layer cyclic winding, and the second winding branch directly crosses from the innermost layer to the outermost layer or directly crosses from the outermost layer to the innermost layer through the cross-layer line 200 during the last cyclic winding, so that the incoming line positions of the two winding branches of the same phase can be the first layer of two consecutive conductor slots 410 respectively, and the outgoing line positions can be the first layer and the nth layer of the same conductor slot 410 respectively, thereby making the incoming and outgoing line positions of the three-phase stacked winding structure more concentrated; when the busbar assembly is subsequently prepared to be reduced, the present application can reduce its size and reduce its preparation difficulty, and at the same time can reduce the risk of failure of the busbar assembly due to vibration during motor operation.

[0081] Embodiment 2

[0082] Embodiment 2 of the present application provides a stator assembly, and the stator assembly includes any cross-layer winding structure provided in the present application.

[0083] Embodiment 3

[0084] Embodiment 3 of the present application provides a motor, and the motor includes any stator assembly provided in the present application.

[0085] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A cross-layer winding structure, characterized in that: The cross-layer outgoing winding structure is used for a stator component, the number of phases of the stator component is three phases, the number of poles is 2p, the stator component further comprises an iron core member (400), the iron core member (400) is provided with Z conductor slots (410) at equal intervals along the circumferential direction, wherein Z is a natural number that is an integer multiple of 6, any of the conductor slots (410) is provided with n slot layers, wherein n is an even number not less than 4, the first, second, ... nth layers of the conductor slots (410) are arranged in sequence from the outside to the inside, the cross-layer outgoing winding structure comprises three-phase winding circuits, any phase winding circuit comprises two parallel winding branches, any winding branch adopts a stacked winding method, and comprises a plurality of stacked coils (100); When Z / 6 is an odd number, in the two winding branches of any phase, the first winding branch enters the first layer, is then wound in the second, third, ... nth layers in sequence, is then wound again in the nth layer, and is then wound in the n-1 ... 2nd, 1st layers in sequence, and then cycles in sequence until the wire comes out from the nth layer; the second winding branch enters the first layer, is then wound in the second, third, ... nth layers in sequence, is then wound again in the nth layer, and is then wound in the n-1 ... 2nd, 1st layers in sequence, and then cycles in sequence until the wire comes out from the nth layer; The last cyclic winding process, in which when the second winding branch is wound in layers n-1...2, 1 in sequence from the nth layer, it is directly wound in layers n-1...2, 1 through the cross-layer line (200) from the first layer to the nth layer, and then wound in layers n-1...2, 1 in sequence, and the wires are led out from the first layer, so that the wire entry positions of the two winding branches of the same phase are respectively the first layers of two consecutive conductor slots (410), and the wire exit positions are respectively the first layers and n layers of the same conductor slot (410); When Z / 6 is an even number, in the two winding branches of any phase, the first winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then it is circulated in sequence until the wire comes out from the first layer; the second winding branch enters the first layer, and is then wound in the second, third, ... nth layers in sequence, and then is wound again in the nth layer, and then is wound in the n-1 ... 2nd, 1st layers in sequence, and then The process is circulated successively until the last winding process. In the last winding process, when the second winding branch is wound from the first layer to the second, third, ... n layers in sequence, it is directly wound from the nth layer to the first layer through the cross-layer line (200), and then wound in the second, third, ... n layers in sequence, and the wires are output from the nth layer, so that the incoming wire positions of the two winding branches of the same phase are the first layers of two consecutive conductor slots (410), and the outgoing wire positions are the first and n layers of the same conductor slot (410).

2. The cross-layer winding structure according to claim 1, characterized in that: The cross-layer output winding structure according to claim 1 is characterized in that the cross-layer line (200) includes a cross-layer welding end (210) and a cross-layer connecting line (220), two cross-layer welding ends (210) are provided, and are respectively arranged close to the 1st layer and the nth layer of the conductor slot (410), and the cross-layer connecting line (220) is connected between the two cross-layer welding ends (210).

3. The cross-layer winding structure according to claim 2, characterized in that: The lapped coil (100) comprises a lapped effective edge (110), a lapped welding end (120) and a lapped hairpin end (130); the lapped effective edge (110) is arranged in the conductor slot (410), and two lapped effective edges (110) are arranged, and the two lapped effective edges (110) are arranged at intervals; the lapped welding end (120) is connected to the lapped effective edge (110) in a one-to-one correspondence; the two lapped welding ends (120) are arranged at the same end of the two lapped effective edges (110) and extend in a direction approaching each other; and the lapped hairpin end (130) is connected between the other ends of the two lapped effective edges (110).

4. The cross-layer winding structure according to claim 3 is characterized in that: The two cross-layer welding ends (210) of the cross-layer wire (200) are respectively connected to one of the stacked welding ends (120) of one of the stacked coils (100), so that the cross-layer wire (200) connects the two stacked coils (100), and the two stacked welding ends (120) connected to the two cross-layer welding ends (210) of the cross-layer wire (200) extend in a direction approaching each other.

5. The cross-layer winding structure according to claim 4, characterized in that: Any winding branch further comprises a connecting coil (300), and a plurality of the stacked coils (100) of any winding branch form a plurality of stacked windings, the cross-layer wire (200) connects the last two stacked windings of the second winding branch, and the connecting coil (300) connects the other two consecutive stacked windings, and the connecting coil (300) comprises a connecting effective edge (310), a connecting welding end (320) and a connecting hairpin end (330), the connecting effective edge (310) is arranged in the conductor slot (410), and two of the connecting effective edges (310) are arranged at intervals, the connecting welding end (320) is connected to the connecting effective edge (310) in a one-to-one correspondence, the two connecting welding ends (320) are arranged at the same end of the two connecting effective edges (310) and extend in the same direction, and the connecting hairpin end (330) is connected between the other ends of the two connecting effective edges (310).

6. The cross-layer winding structure according to claim 5, characterized in that: The cross-layer outgoing winding structure according to claim 5 is characterized in that Z=54, P=3, n=8, the three phases of the stator assembly are U phase, V phase and W phase respectively, the winding circuits of the V phase and the W phase are obtained by translating the winding circuit of the U phase by 6 and 12 conductor slots (410) respectively, and the first winding branch of the U phase is: 1.1-10.2-1.3-10.4-1.5-10.6-1.7-10.8-19.8-10.7-19.6-10.5-19.4-10.3-19.2-10.1-20.1-29.2-20.3-29.4-20.5-29.6-20.7-29.8-38.8-29.7-38.6-29.5-38.4-29.3-38.2-29.1-21.1-30.2-21.3-30.4-21.5-30.6-21.7-30.8-39.8-30.7-39.6-30.5-39.4-30.3-39.2-30.1-38.1-47.2-38.3-47.4-38.5-47.6-38.7-47.8-1.8-46.7-1.6-46.5-1.4-46.3-1.2-46.1-39.1-48.2-39.3-48.4-39.5-48.6-39.7-48.8； The second winding branch of the U phase is: 2.1-11.2-2.3-11.4-2.5-11.6-2.7-11.8-20.8-11.7-20.6-11.5-20.4-11.3-20.2-11.1-3.1-12.2-3.3-12.4-3.5-12.6-3.7-12.8-21.8-12.7-21.6-12.5-21.4-12.3-21.2-12.1-19.1-28.2-19.3-28.4-19.5-28.6-19.7-28.8-37.8-28.7-37.6-28.5-37.4-28.3-37.2-28.1-37.1-46.2-37.3-46.4-37.5-46.6-37.7-46.8-2.8-47.7-2.6-47.5-2.4-47.3-2.2-47.1-3.8-48.7-3.6-48.5-3.4-48.3-3.2-48.1。 7. The cross-layer winding structure according to claim 1, characterized in that: The cross-layer outgoing winding structure further comprises a phase copper bar (500), wherein the phase copper bar (500) corresponds one-to-one to the three phases of the stator assembly, and the phase copper bar (500) is connected to the incoming line positions of the two winding branches of the corresponding phase.

8. The cross-layer winding structure according to claim 1, characterized in that: The cross-layer outgoing line winding structure further comprises a star point copper bar (600), and the star point copper bar (600) is connected to the outgoing line positions of a total of six winding branches of three phases.

9. A stator assembly, characterized in that: The stator assembly includes the cross-layer winding structure as described in any one of claims 1-8.

10. A motor, characterized in that: The electric machine comprises the stator assembly of claim 9.

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