Multi-branch winding structure with concentrated wire inlet and wire outlet, stator assembly and motor

Abstract

The invention relates to a multi-branch winding structure capable of centralizing wire inlet and wire outlet, a stator assembly and a motor, the multi-branch winding structure comprises a U phase winding circuit, a V phase winding circuit and a W phase winding circuit, the winding circuit of each phase comprises two winding branches, each winding branch comprises a plurality of lap-wound coils, and the lap-wound coils have two types; each winding branch also comprises a connecting coil, and the connecting coil has six line types; or, the winding circuit of each phase comprises three winding branches, each winding branch comprises a plurality of lap-wound coils, and the lap-wound coils have two types; and each winding branch also comprises a connecting coil, and the connecting coil has four types of line types. According to the three-phase winding, the problem that incoming wires and outgoing wires are concentrated due to the fact that a 54-slot, 6-pole and 6-layer three-phase winding structure shares a coil to be compatible with development of two parallel branches and three parallel branches in the prior art can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a multi-branch winding structure with centralized input and output lines, 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, which usually includes a stator assembly, and the stator assembly can be mainly composed of a stator core and a winding structure wound on the stator core. For a three-phase motor, the winding structure usually includes three-phase winding circuits, and the winding circuit of each phase can include several parallel winding branches, each winding branch includes several coils, and several coils are wound in the conductor slot of the stator core in a specific winding manner. The winding structure also usually includes a phase copper bar and a star point copper bar, which are used to properly connect the incoming line position and the outgoing line position of the winding branch to form a three-phase short circuit. For the three-phase winding structure with 54 slots, 6 poles and 6 layers, in order to meet the development of both high-voltage motors and low-voltage motors, it can save development costs by using the winding structure of the two motor products to share coils. For example, the winding structure of 2 parallel branches and the winding structure of 3 parallel branches can be set as a stacked winding, and the two winding structures share coils. However, the two winding structures of the common coil in the prior art have the problem that the incoming wires and the outgoing wires are not centralized. Summary of the invention

[0003] Based on this, the present application provides a multi-branch winding structure, stator assembly and motor with centralized input and output lines to improve the problem of centralized input and output lines in the existing three-phase winding structure with 54 slots, 6 poles and 6 layers, in order to be compatible with the development of parallel 2 branches and parallel 3 branches and share coils.

[0004] In a first aspect, the present application provides a multi-branch winding structure with concentrated input and output lines, the multi-branch winding structure with concentrated input and output lines is used for a stator assembly, the number of phases of the stator assembly is three phases, the number of poles is six poles, the stator assembly also includes a stator core, the inner side of the stator core is provided with 54 conductor slots at equal intervals along the circumferential direction, the first layer, the second layer ... the sixth layer of the conductor slots are arranged in sequence from the outside to the inside, the multi-branch winding structure with concentrated input and output lines includes winding circuits of three phases in total, namely, U, V and W, the winding circuit of each phase is completely arranged in three consecutive conductor slots, and 6 conductor slots are evenly spaced, the winding circuit of the V phase and the winding circuit of the W phase are obtained by translating the winding circuit of the U phase by 6 and 12 conductor slots respectively along the same winding direction;

[0005] Wherein, the winding circuit of each phase includes two winding branches, the line entry positions of the two winding branches are the first layer and the sixth layer of two conductor slots arranged at intervals among the three consecutive conductor slots, and the line exit positions of the two winding branches are the first layer and the sixth layer of two conductor slots arranged at intervals among the other three consecutive conductor slots; each winding branch includes a plurality of stacked coils, the stacked coils include two stacked effective edges, the stacked effective edges are arranged in one of the slot layers of the conductor slots, the number of the conductor slots spaced between the two stacked effective edges of the stacked coils is the pitch of the stacked coils, and the stacked coils have two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots and spanning the fourth layer. The first layer and the fifth layer, several stacked coils are connected to form a stacked winding group; each winding branch also includes a connecting coil, the connecting coil includes two connecting effective sides, the connecting effective sides are also arranged in one of the slot layers of the conductor slots, the connecting coil connects two adjacent stacked winding groups, the number of the conductor slots spaced between the two connecting effective sides of the connecting coil is the pitch of the connecting coil, and the connecting coil has 6 line types: a pitch of 7 slots and spanning the 1st layer and the 1st layer, a pitch of 8 slots and spanning the 1st layer and the 1st layer, a pitch of 10 slots and spanning the 1st layer and the 1st layer, a pitch of 7 slots and spanning the 6th layer and the 6th layer, a pitch of 8 slots and spanning the 6th layer and the 6th layer, and a pitch of 10 slots and spanning the 6th layer and the 6th layer;

[0006] Alternatively, the winding line of each phase includes three winding branches, the line entry positions of the three winding branches are the sixth layer of three consecutive conductor slots, and the line exit positions of the three winding branches are the sixth layer of another three consecutive conductor slots; each winding branch includes a plurality of stacked coils, the stacked coils include two stacked effective sides, the stacked effective sides are arranged in one of the slot layers of the conductor slots, the number of the conductor slots spaced between the two stacked effective sides of the stacked coil is the pitch of the stacked coil, and the stacked coils have two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots and spanning the fourth layer. The first and the fifth layers, several stacked coils are connected to form a stacked winding; each winding branch also includes a connecting coil, the connecting coil includes two connecting effective edges, the connecting effective edges are also arranged in one of the slot layers of the conductor slots, the connecting coil connects two adjacent stacked windings, the number of the conductor slots spaced between the two connecting effective edges of the connecting coil is the pitch of the connecting coil, and the connecting coil has 4 line types: a pitch of 7 slots and spanning the 1st layer and the 1st layer, a pitch of 10 slots and spanning the 1st layer and the 1st layer, a pitch of 7 slots and spanning the 6th layer and the 6th layer, and a pitch of 10 slots and spanning the 6th layer and the 6th layer.

[0007] In one embodiment, the lapped coil further includes a lapped welding end and a lapped hairpin end, and there are two lapped welding ends, which correspond one-to-one to the two lapped effective edges and are arranged at the same end of the two lapped effective edges, and the two lapped welding ends extend in a direction approaching each other, and the lapped hairpin end connects the other ends of the two lapped effective edges; the connecting coil further includes a connecting welding end and a connecting hairpin end, and there are two connecting welding ends, which correspond one-to-one to the two connected effective edges and are arranged at the same end of the two connected effective edges, and the two connecting welding ends extend in the same direction, and the connecting hairpin end connects the other ends of the two connected effective edges.

[0008] In one embodiment, each winding branch also includes an introduction wire and a lead-out wire, and the introduction wire includes an introduction effective edge, an introduction welding end and an introduction hairpin end. When the winding circuit of each phase includes two winding branches, the introduction effective edge is arranged on the first layer or the sixth layer of a conductor slot; when the winding circuit of each phase includes three winding branches, the introduction effective edge is arranged on the sixth layer of a conductor slot, and the introduction welding end and the introduction hairpin end are arranged at both ends of the introduction effective edge; the lead-out wire includes an lead-out effective edge, a lead-out welding end and a lead-out hairpin end. When the winding circuit of each phase includes two winding branches, the lead-out effective edge is arranged on the first layer or the sixth layer of a conductor slot; when the winding circuit of each phase includes three winding branches, the lead-out effective edge is arranged on the sixth layer of a conductor slot, and the lead-out welding end and the lead-out hairpin end are arranged at both ends of the lead-out effective edge.

[0009] In one embodiment, when the winding circuit of each phase includes two winding branches, the first winding branch of the U phase is:

[0010] 3.1-48.2-3.3-48.4-3.5-48.6-38.6-47.5-38.4-47.3-38.2-47.1-1.1-46.2-1.3-46.4-1.5-46.6-39.6-48.5-39.4-48.3-39.2-48.1-2.1-47.2-2.3-47. 4-2.5-47.6-37.6-46.5-37.4-46.3-37.2-46.1-39.1-30.2-39.3-30.4-39.5-30.6-20.6-29.5-20.4-29.3-20.2-29.1-37.1-28.2-37.3-28.4-37.5-28.6;

[0011] The second winding branch of the U phase is:

[0012] 1.6-10.5-1.4-10.3-1.2-10.1-2.6-20.1-11.2-20.3-11.4-20.5-11.6-3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-2.6-11.5-2.4-1 1.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-21.6-30.5-21.4-30.3-21.2-30.1.

[0013] In one embodiment, when the winding circuit of each phase includes three winding branches, the first winding branch of the U phase is:

[0014] 1.6-10.5-1.4-10.3-1.2-10.1-20.1-11.2-20.3-11.4-20.5-11.6-21.6-30.5-21.4-30.3-21.2-30.1-37.1-28.2-37.3-28.4-37.5-28.6-38.6-47.5-38.4-47.3-38.2-47.1-3.1-48.2-3.3-48.4-3.5-48.6;

[0015] The second winding branch of the U phase is:

[0016] 2.6-11.5-2.4-11.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-39.6-48.5-39.4-48.3-39.2-48.1-1.1-46.2-1.3-46.4-1.5-46.6;

[0017] The third winding branch of the U phase is:

[0018] 3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-20.6-29.5-20.4-29.3-20.2-29.1-39.1-30.2-39.3-30.4-39.5-30.6-37.6-46.5-37.4-46.3-37.2-46.1-2.1-47.2-2.3-47.4-2.5-47.6.

[0019] In one embodiment, the multi-branch winding structure with centralized incoming and outgoing lines also includes a phase copper bar, which corresponds one-to-one to three phases. The phase copper bar includes a first copper bar piece and a first terminal. The first terminal corresponds one-to-one to and is connected to the incoming line positions of all winding branches of the phase corresponding to the phase copper bar, and the first copper bar piece connects all of the first terminals.

[0020] In one embodiment, the multi-branch winding structure with centralized incoming and outgoing lines also includes a star-point copper bar, which includes a second copper bar piece and a second terminal, the second terminals correspond one-to-one to and are connected to the outgoing line positions of all winding branches of the three phases, and the second copper bar piece connects all the second terminals.

[0021] In one of the embodiments, the multi-branch winding structure with concentrated incoming and outgoing lines further includes a structural member, and the structural member fixes all the phase copper bars together, or fixes all the phase copper bars and the star point copper bar together.

[0022] In a second aspect, the present application provides a stator assembly, which includes any one of the multi-branch winding structures with concentrated input and output lines provided in the present application.

[0023] In a third aspect, the present application provides a motor, comprising any one of the stator assemblies provided in the present application.

[0024] By reasonably setting the types and line types of U-shaped coils, the present application can make the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 2 parallel branches include all the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel branches, that is, the U-shaped coils used in the winding structure of 3 parallel branches are all from the winding structure of 2 parallel branches, so as to be compatible with the development of 54 slots, 6 poles, 6 layers, 3 parallel branches and 2 parallel branches. At the same time, by reasonably setting the line-in position and line-out position of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches, the present application can make the line-in position and line-out position of the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches relatively concentrated. Therefore, the present application can effectively improve the problem of concentrated incoming and outgoing lines in the existing technology of a three-phase winding structure with 54 slots, 6 poles and 6 layers, which is compatible with the development of parallel 2 branches and parallel 3 branches and has a shared coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a stator assembly applicable when the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application is a parallel 2-branch winding structure;

[0026] Figure 2 A schematic diagram of the structure of a stator assembly applicable when the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application is a parallel three-branch winding structure;

[0027] Figure 3 A schematic diagram of a conductor slot structure of a stator assembly to which the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application is applicable;

[0028] Figure 4 A winding circuit diagram when the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application is a parallel 2-branch winding structure;

[0029] Figure 5 A winding circuit diagram when the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application is a parallel three-branch winding structure;

[0030] Figure 6 A schematic diagram of the structure of a stacked coil with a multi-branch winding structure having concentrated input and output lines provided in the first embodiment of the present application;

[0031] Figure 7 A schematic diagram of the structure of the connection coil of the multi-branch winding structure with concentrated input and output lines provided in the first embodiment of the present application;

[0032] Figure 8 A schematic diagram of the structure of the lead-in wire of the multi-branch winding structure with centralized incoming and outgoing wires provided in the first embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the structure of the lead-out wires of a multi-branch winding structure with concentrated input and output wires provided in the first embodiment of the present application;

[0034] Fig.10 A winding circuit diagram of the first winding branch of the U phase when the multi-branch winding structure with concentrated input and output provided in the first embodiment of the present application is a parallel 2-branch winding structure;

[0035] Fig.11 A winding circuit diagram of the first winding branch of the U phase when the multi-branch winding structure with concentrated input and output provided in the first embodiment of the present application is a parallel three-branch winding structure;

[0036] Fig.12 A schematic diagram of the structure of a phase copper bar of a multi-branch winding structure with concentrated incoming and outgoing lines provided in the first embodiment of the present application;

[0037] Fig.13 A schematic structural diagram of the Xingdian copper busbar with a multi-branch winding structure with centralized incoming and outgoing lines provided in Example 1 of the present application.

[0038] : 100, lap-wound coil; 110, lap-wound effective edge; 120, lap-wound welding end; 130, lap-wound hairpin end; 200, connection coil; 210, connection effective edge; 220, connection welding end; 230, connection hairpin end; 300, lead-in wire; 310, lead-in effective edge; 320, lead-in welding end; 330, lead-in hairpin end; 400, lead-out wire; 410, lead-out effective edge; 420, lead-out welding end; 430, lead-out hairpin end; 500, phase copper bar; 510, first copper bar component; 520, first terminal; 600, star point copper bar; 610, second copper bar component; 620, second terminal; 700, structural component; 800, stator core; 810, conductor slot. DETAILED DESCRIPTION

[0039] 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.

[0040] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0041] 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.

[0042] 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.

[0043] Embodiment 1

[0044] Embodiment 1 of the present application provides a multi-branch winding structure with centralized input and output lines, such as Figures 1 to 13 As shown, the multi-branch winding structure with concentrated input and output lines is used for the stator assembly. The number of phases of the stator assembly is three phases, the number of poles is six poles, and the stator assembly also includes a stator core 800. The inner side of the stator core 800 is provided with 54 conductor slots 810 at equal intervals along the circumferential direction. The first layer, the second layer ... the sixth layer of the conductor slots 810 are arranged in sequence from the outside to the inside. The multi-branch winding structure with concentrated input and output lines includes winding circuits of three phases, U, V and W. The winding circuit of each phase is completely arranged in three consecutive conductor slots 810, and is evenly spaced by six conductor slots 810. The winding circuit of the V phase and the winding circuit of the W phase are obtained by translating the winding circuit of the U phase by 6 and 12 conductor slots 810 respectively along the same winding direction.

[0045] The winding circuit of each phase includes two winding branches, the line entry positions of the two winding branches are the first layer and the sixth layer of two conductor slots 810 spaced apart in three consecutive conductor slots 810, and the line exit positions of the two winding branches are the first layer and the sixth layer of two conductor slots 810 spaced apart in another three consecutive conductor slots 810; each winding branch includes a plurality of stacked coils 100, the stacked coils 100 include two stacked effective edges 110, the stacked effective edges 110 are arranged in one of the slot layers of the conductor slots 810, the number of conductor slots 810 spaced apart by the two stacked effective edges 110 of the stacked coil 100 is the pitch of the stacked coil 100, and the stacked coil 100 has two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots. and spans the 4th and 5th layers, a plurality of stacked coils 100 are connected to form stacked windings; each winding branch further comprises a connecting coil 200, the connecting coil 200 comprises two connecting effective edges 210, the connecting effective edges 210 are also arranged in one of the slot layers of the conductor slots 810, the connecting coil 200 connects two adjacent stacked windings, the number of the conductor slots 810 spaced between the two connecting effective edges 210 of the connecting coil 200 is the pitch of the connecting coil 200, and the connecting coil 200 has 6 line types: a pitch of 7 slots and spans the 1st layer and the 1st layer, a pitch of 8 slots and spans the 1st layer and the 1st layer, a pitch of 10 slots and spans the 1st layer and the 1st layer, a pitch of 7 slots and spans the 6th layer and the 6th layer, a pitch of 8 slots and spans the 6th layer and the 6th layer, and a pitch of 10 slots and spans the 6th layer and the 6th layer;

[0046] Alternatively, the winding circuit of each phase includes three winding branches, the line entry positions of the three winding branches are the sixth layer of three consecutive conductor slots 810, and the line exit positions of the three winding branches are the sixth layer of another three consecutive conductor slots 810; each winding branch includes a plurality of stacked coils 100, the stacked coils 100 include two stacked effective sides 110, the stacked effective sides 110 are arranged in one of the slot layers of the conductor slots 810, the number of conductor slots 810 spaced between the two stacked effective sides 110 of the stacked coil 100 is the pitch of the stacked coil 100, and the stacked coil 100 has two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots and spanning the first and second layers. On the 4th and 5th layers, several stacked coils 100 are connected to form stacked windings; each winding branch also includes a connecting coil 200, the connecting coil 200 includes two connecting effective edges 210, and the connecting effective edges 210 are also arranged in one of the slot layers of the conductor slots 810. The connecting coil 200 connects two adjacent stacked windings, and the number of conductor slots 810 spaced between the two connecting effective edges 210 of the connecting coil 200 is the pitch of the connecting coil 200. The connecting coil 200 has 4 line types: a pitch of 7 slots and spans the 1st layer and the 1st layer, a pitch of 10 slots and spans the 1st layer and the 1st layer, a pitch of 7 slots and spans the 6th layer and the 6th layer, and a pitch of 10 slots and spans the 6th layer and the 6th layer.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, it is exemplarily explained that the stator assembly may include a stator core 800 and a winding structure wound on the stator core 800. The stator core 800 may be formed by stacking a number of punching sheets, which may be set as a hollow cylindrical structure. The conductor slot 810 may be arranged on the inner side of the stator core 800, and 54 conductor slots 810 may be arranged at equal intervals along the circumference of the stator core 800. The conductor slot 810 may be provided with 6 slot layers along the radial direction of the customized core; at the same time, based on the axis of the stator core 800 from the inside to the outside, the 6 slot layers may be defined as the first layer, the second layer... the sixth layer of the conductor slot 810 in sequence. The winding structure may be wound on the stator core 800, and part of it may be wound in the conductor slot 810.

[0048] like Figure 4 and Figure 5As shown, the stator assembly can be applied to a three-phase motor, and the three phases of the stator assembly can be U phase, V phase and W phase, respectively, wherein 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, other marks can also be used to represent the three phases of the stator assembly. Correspondingly, the winding structure includes winding circuits for three phases, namely, winding circuits for three phases in total, namely, U phase, V phase and W phase. For any phase, its winding circuit is completely arranged in three consecutive conductor slots 810, that is, all slot layers of the three consecutive conductor slots 810 are occupied; at the same time, its winding circuit is evenly spaced by 6 conductor slots 810. In order to ensure the balance of the three phases, the winding branches of the V phase and the W phase can be obtained by translating the winding branch of the U phase by 54 / (3*6 / 2)=6 and 54*2 / (3*6 / 2)=12 conductor slots 810 in sequence.

[0049] like Figure 6 and Figure 7 As shown, in this embodiment, the winding circuit of any phase in the three phases includes 2 or 3 winding branches, that is, the winding structure in this embodiment is a multi-branch winding structure. Each winding branch is formed by connecting a plurality of coils, and the portion of the coil arranged in the conductor slot 810 can be called its effective side. When the coil has two effective sides, its shape can be called a U-shaped coil because it is similar to a "U" shape. The winding branches in this embodiment include two types of U-shaped coils, namely, a stacked coil 100 and a connecting coil 200; wherein the stacked coil 100 is used for stacking each winding branch, and the stacking shape has a plurality of stacked windings, and the connecting coil 200 is used to connect two consecutive stacked windings. The number of conductor slots 810 spaced between the two effective sides of the U-shaped coil is the pitch of the coil, for example, the pitch of the U-shaped coil can be 7 slots, 8 slots or 10 slots, etc. At the same time, according to actual winding needs, the two effective sides of the U-shaped coil can be arranged in the same slot layer of the two conductor slots 810, for example, the two effective sides of the U-shaped coil span the 1st layer and the 1st layer, or span the 6th layer and the 6th layer; they can also be arranged in different slot layers of the two conductor slots 810, for example, the two effective sides of the U-shaped coil span the 2nd layer and the 3rd layer, or span the 4th layer and the 5th layer.

[0050] It is not difficult to see that, in the same type of coil, the pitch of the U-shaped coil and the span of its two effective sides determine the line type of the U-shaped coil. For example, in the same type of U-shaped coil, the line type of the U-shaped coil with a pitch of 7 slots is different from that of the U-shaped coil with a pitch of 8 slots; for another example, in the same type of U-shaped coil, the line type of the U-shaped coil spanning the 1st layer and the 1st layer is different from that of the U-shaped coil spanning the 2nd layer and the 3rd layer. It should be noted that, since the 6 slot layers of the conductor slot 810 are arranged at different positions in the radial direction of the stator core 800, when the two U-shaped coils belong to the same type and have the same pitch, even if the two effective sides of the two U-shaped coils span two adjacent slot layers, there are cases where they are not of the same line type. For example, in the same type of U-shaped coil, the U-shaped coil with a pitch of 9 slots and spanning the 2nd layer and the 3rd layer is still a different line type from the U-shaped coil with a pitch of 9 slots and spanning the 4th layer and the 5th layer.

[0051] like Figure 4 As shown, in this embodiment, when the winding branch of any phase includes two parallel winding branches, the plurality of stacked coils 100 of any winding branch have two line types, and the pitch of the stacked coils 100 of the two line types is 9 slots, wherein the two stacked effective sides 110 of the stacked coils 100 of one line type span the 2nd layer and the 3rd layer, and the two stacked effective sides 110 of the stacked coils 100 of the other line type span the 4th layer and the 5th layer. It is not difficult to understand that when the two stacked coils 100 are reversely wound, they can also be used to span the 3rd layer and the 2nd layer, and span the 5th layer and the 4th layer, respectively. At the same time, the several connecting coils 200 of any winding branch have 6 line types, 3 of which are arranged at the innermost side of the winding structure, and their two connecting effective edges 210 span the 1st layer and the 1st layer, and their pitches are 7 slots, 8 slots and 10 slots respectively; the other 3 are arranged at the outermost side of the winding structure, and their two connecting effective edges 210 span the 6th layer and the 6th layer, and their pitches are 7 slots, 8 slots and 10 slots respectively.

[0052] During the winding process, the two winding branches of any phase are fed with wires from the first and sixth layers of two conductor slots 810 spaced apart from each other among the three continuous conductor slots 810. For example, one winding branch is fed with wires from the sixth layer of the conductor slot 810 numbered "m", and the other winding branch is fed with wires from the first layer of the conductor slot 810 numbered "m+2", where m is a positive integer not greater than 72. The two winding branches of any phase are fed with wires from the first and sixth layers of two conductor slots 810 spaced apart from each other among the three continuous conductor slots 810. For example, one winding branch is fed with wires from the first layer of the conductor slot 810 numbered "n", and the other winding branch is fed with wires from the sixth layer of the conductor slot 810 numbered "n+2", where n is a positive integer and is not equal to m.

[0053] It should be noted that in the winding structure of 54 slots, 6 layers and 2 parallel branches, each phase occupies a total of 54*6 / 3=108 layers, and each winding branch occupies 108 / 2=54 layers. Based on the line type of the stacked coil 100 and the connecting coil 200 of each winding branch, it is preferably wound from the inside to the outside or from the right outside to the inside. Therefore, when the winding branch enters the wire at the 6th layer, it can exit the wire from the 1st layer; and when the winding branch enters the wire at the 1st layer, it can exit the wire from the 6th layer.

[0054] like Figure 5 As shown, in this embodiment, when the winding branch of any phase includes three parallel winding branches, the plurality of stacked coils 100 of any winding branch still have two line types, and the two line types are the same as the two line types of the stacked coils 100 when the winding branch of any phase includes two parallel winding branches, that is, the stacked coils 100 have two line types with a pitch of 9 slots and two stacked effective sides 110 spanning the 2nd layer and the 3rd layer and spanning the 4th layer and the 5th layer. The plurality of connected coils 200 of any winding branch have four line types, two of which are arranged at the innermost side of the winding structure, and the two connected effective sides 210 span the 1st layer and the 1st layer, and the pitches are 7 slots and 10 slots respectively; the other two are arranged at the outermost side of the winding structure, and the two connected effective sides 210 span the 6th layer and the 6th layer, and the pitches are 7 slots and 10 slots respectively. It is not difficult to see that when the winding branches of any phase include three parallel winding branches, the four line types connecting the coil 200 are included in the six line types connecting the coil 200 when the winding branches of any phase include two parallel winding branches.

[0055] During the winding process, the three winding branches of any phase enter the sixth layer of three consecutive conductor slots 810, for example, the entry positions of the three winding branches of any phase are p.6, (p+1).6 and (p+2).6, where "p.6" represents the sixth layer of the conductor slot 810 with the serial number "p"; similarly, p is a positive integer not greater than 72. The three winding branches of any phase exit the sixth layer of another three consecutive conductor slots 810, for example, the entry positions of the three winding branches of any phase are q.6, (q+1).6 and (q+2).6, where q is a positive integer and is not equal to p.

[0056] It can be understood that, by reasonably setting the types and line types of U-shaped coils, the present application can make the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 2 parallel branches include all the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel branches, that is, the U-shaped coils used in the winding structure of 3 parallel branches are all from the winding structure of 2 parallel branches, so as to be compatible with the development of 54 slots, 6 poles, 6 layers, 3 parallel branches and 2 parallel branches. At the same time, by reasonably setting the line-in position and line-out position of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches, the present application can make the line-in position and line-out position of the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches relatively concentrated. Therefore, the present application can effectively improve the problem of concentrated incoming and outgoing lines in the existing technology of a three-phase winding structure with 54 slots, 6 poles and 6 layers, which is compatible with the development of parallel 2 branches and parallel 3 branches and has a shared coil.

[0057] Specifically, the lapped coil 100 also includes a lapped welding end 120 and a lapped hairpin end 130, and two lapped welding ends 120 are provided, and the two lapped welding ends 120 correspond one-to-one to the two lapped effective edges 110, and are arranged at the same end of the two lapped effective edges 110, and the two lapped welding ends 120 extend in a direction approaching each other, and the lapped hairpin end 130 connects the other ends of the two lapped effective edges 110; the connecting coil 200 also includes a connecting welding end 220 and a connecting hairpin end 230, and two connecting welding ends 220 are provided, and the two connecting welding ends 220 correspond one-to-one to the two connecting effective edges 210, and are arranged at the same end of the two connecting effective edges 210, and the two connecting welding ends 220 extend in the same direction, and the connecting hairpin end 230 connects the other ends of the two connecting effective edges 210.

[0058] like Figure 6 As shown, in this embodiment, it is exemplified that the coil can be prepared and formed by a conductor in one piece, for example, the coils are all wound by flat copper wire, and the stator assembly is suitable for a flat wire motor. The lapped coil 100 also includes a lapped welding end 120 and a lapped hairpin end 130, wherein the lapped welding end 120 is provided with two, which are respectively connected to the same end of the two lapped effective edges 110, and the two lapped welding ends 120 extend in a direction close to each other. The lapped hairpin end 130 is provided with only one, which can be provided in a shape similar to a "V", and its "V"-shaped opening connects the other ends of the two lapped effective edges 110, so that the lapped coil 100 is in a shape similar to a "U". When two lapped coils 100 are connected, one lapped coil 100 is connected to one lapped welding end 120 of the other lapped coil 100 through one lapped welding end 120 thereof, and the two lapped welding ends 120 can be welded and fixed.

[0059] like Figure 7 As shown, similarly, the connecting coil 200 also includes two connecting welding ends 220 and a connecting hairpin end 230, and the two connecting welding ends 220 extend in the same direction to facilitate the connection of two consecutive lap windings. The connecting hairpin end 230 can be set to a shape similar to the lap winding hairpin end 130, so that the connecting coil 200 is in a shape similar to a "U" shape. It is not difficult to understand that the connecting coil 200 is connected to two lap winding coils 100, one of the connecting effective edges 210 is connected to a lap winding welding section of one lap winding coil 100, and the other connecting effective edge 210 is connected to a lap winding welding end 120 of another lap winding group. Similarly, the connecting welding end 220 and the lap winding welding end 120 can also be welded and fixed.

[0060] It can be understood that this embodiment reasonably sets the shapes of the stacked coil 100 and the connecting coil 200, so as to facilitate the stacking of the stacked coil 100 and the stacking of the windings, and facilitate the connecting coil 200 to connect two consecutive stacked windings, so as to obtain the required winding structure by winding, thereby achieving the effect of concentrating the input and output positions while being compatible with the development of parallel 2 branches and parallel 3 branches.

[0061] More specifically, each winding branch further includes an introduction wire 300 and an outlet wire 400, the introduction wire 300 includes an introduction effective edge 310, an introduction welding end 320 and an introduction hairpin end 330, when each phase winding line includes two winding branches, the introduction effective edge 310 is arranged on the first layer or the sixth layer of a conductor slot 810, when each phase winding line includes three winding branches, the introduction effective edge 310 is arranged on the sixth layer of a conductor slot 810, the introduction welding end 320 and the introduction hairpin end 330 are arranged At both ends of the lead-in effective edge 310; the lead-out wire 400 includes a lead-out effective edge 410, a lead-out welding end 420 and a lead-out card end 430. When the winding circuit of each phase includes two winding branches, the lead-out effective edge 410 is arranged on the first layer or the sixth layer of a conductor slot 810. When the winding circuit of each phase includes three winding branches, the lead-out effective edge 410 is arranged on the sixth layer of a conductor slot 810, and the lead-out welding end 420 and the lead-out card end 430 are arranged at both ends of the lead-out effective edge 410.

[0062] like Figure 8 and Fig. 9As shown, in this embodiment, it is exemplarily explained that when the coil has only one effective side, its shape can be called an I-shaped coil because it is similar to an "I" shape. The winding branches in this embodiment include two types of I-shaped coils, namely, the lead-in wire 300 and the lead-out wire 400. Each winding branch uses the lead-in wire 300 as the line-in position and the lead-out wire 400 as the line-out position. The lead-in wire 300 can include an effective lead-in side 310 and an lead-in welding end 320 and an lead-in hairpin end 330 connected to both ends of the effective lead-in side 310. When the winding circuit of each phase includes two winding branches, the effective lead-in side 310 is arranged at the first layer or the sixth layer of a conductor slot 810; and when the winding circuit of each phase includes three winding branches, the effective lead-in side 310 is arranged at the sixth layer of a conductor slot 810. The lead-out wire 400 may include a lead-out effective edge 410, a lead-out welding end 420 connected to both ends of the lead-out effective edge 410, and a lead-out card end 430. When the winding circuit of each phase includes two winding branches, the lead-out effective edge 410 is arranged at the first layer or the sixth layer of a conductor slot 810; and when the winding circuit of each phase includes three winding branches, the lead-out effective edge 410 is arranged at the sixth layer of a conductor slot 810. The lead-in wire 300 and the lead-out wire 400 are both connected to a stacked coil 100. When connected, the lead-in welding end 320 of the lead-in wire 300 and the lead-out welding end 420 of the lead-out wire 400 can be welded and fixed to a stacked welding end 120 of the stacked coil 100.

[0063] It can be understood that, in this embodiment, by using the lead-in wire 300 as the starting position of winding of each winding branch, and the lead-out wire 400 as the ending position of winding of each branch, and reasonably setting the shapes of the lead-in wire 300 and the lead-out wire 400, it is convenient to set the stacked coil 100 to a line type spanning the 2nd and 3rd layers and the 4th and 5th layers, and at the same time, it is convenient to set the connecting coil 200 to a line type spanning the 1st and 1st layers and the 6th and 6th layers.

[0064] Specifically, when the winding circuit of each phase includes two winding branches, the first winding branch of the U phase is:

[0065] 3.1-48.2-3.3-48.4-3.5-48.6-38.6-47.5-38.4-47.3-38.2-47.1-1.1-46.2-1.3-46.4-1.5-46.6-39.6-48.5-39.4-48.3-39.2-48.1-2.1-47.2-2.3-47. 4-2.5-47.6-37.6-46.5-37.4-46.3-37.2-46.1-39.1-30.2-39.3-30.4-39.5-30.6-20.6-29.5-20.4-29.3-20.2-29.1-37.1-28.2-37.3-28.4-37.5-28.6;

[0066] The second winding branch of phase U is:

[0067] 1.6-10.5-1.4-10.3-1.2-10.1-2.6-20.1-11.2-20.3-11.4-20.5-11.6-3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-2.6-11.5-2.4-1 1.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-21.6-30.5-21.4-30.3-21.2-30.1.

[0068] In this embodiment, for example, the 54 conductor slots 810 of the stator core 800 may be numbered sequentially using serial numbers “1-54”, and the serial numbers “1-54” are only for the convenience of describing the conductor slots 810 and are not used to impose any limitation thereon.

[0069] like Fig.10 As shown, the first winding branch of the U phase is used as an example for explanation. The line corresponding to "3.1" represents the lead-in line 300, and its lead-in effective edge 310 is arranged in the first layer of the conductor slot 810 with the serial number "3". Figure 3 and Fig.10U1 in the figure. The line corresponding to "48.2-3.3" represents a lapped coil 100 with a pitch of 9 slots, and its two lapped effective sides 110 are respectively arranged in the second layer of the conductor slot 810 with the serial number "48" and the third layer of the conductor slot 810 with the serial number "3". The line corresponding to "48.4-3.5" represents a lapped coil 100 with a pitch of 9 slots, and its two lapped effective sides 110 are respectively arranged in the fourth layer of the conductor slot 810 with the serial number "48" and the fifth layer of the conductor slot 810 with the serial number "3"; and the line "48.2-3.3-48.4-3.5" represents the first lapped winding group. The line corresponding to "48.6-38.6" indicates a connection coil 200 with a pitch of 10 slots, and its two connection effective sides 210 are arranged in the 6th layer of the conductor slot 810 with the serial number "48" and the 6th layer of the conductor slot 810 with the serial number "38" respectively. The subsequent lines can be obtained in the same way, among which the line corresponding to "47.5-38.4-47.3-38.2" indicates the second stacked winding, and "47.5-38.4", "47.3-38.2", "46.2-1.3", "46.4-1.5", "48.5-39.4", "48.3-39.2", "47.2-2.3", "47.4-2.5", "46.5-37.4", "46 .3-37.2", "30.2-39.3", "30.4-39.5", "29.5-20.4", "29.3-20.2", "28.2-37.3" and "28.4-37.5" corresponding lines all represent the stacked coil 100; it is not difficult to see that in the first winding branch of the U phase, the stacked coil 100 has two line types, that is, the pitch is 9 slots and spans the 2nd and 3rd layers and spans the 4th and 5th layers. The lines corresponding to "47.1-1.1", "46.6-39.6", "48.1-2.1", "47.6-37.6", "46.1-39.1", "30.6-20.6" and "29.1-37.1" are all connecting coils 200; it is not difficult to see that in the first winding branch of the U phase, the connecting coil 200 has 6 line types, namely, a pitch of 7 slots and spanning the 1st layer and the 1st layer, a pitch of 8 slots and spanning the 1st layer and the 1st layer, a pitch of 10 slots and spanning the 1st layer and the 1st layer, a pitch of 7 slots and spanning the 6th layer and the 6th layer, a pitch of 8 slots and spanning the 6th layer and the 6th layer, and a pitch of 10 slots and spanning the 6th layer and the 6th layer. The line corresponding to "28.6" represents the lead-out line 400, whose lead-out effective edge 410 is arranged on the 6th layer of the conductor slot 810 numbered "28", refer to Figure 3 and Fig.10 X1 in.

[0070] The second winding branch of phase U is similar, where the line corresponding to "1.6" indicates the lead-in line 300, see Figure 3U2 in the diagram. The line corresponding to "30.1" indicates the lead wire 400, see Figure 3 X2 in.

[0071] The winding line of the V phase can be obtained by translating the winding line of the U phase by 6 conductor slots 810 in the direction of increasing conductor slot numbers. The entry positions of the two winding branches are the lines corresponding to "9.1" and "7.6", respectively. Figure 3 V1 and V2 in the figure; the outlet positions of the two winding branches are the lines corresponding to "34.6" and "36.1", refer to Figure 3 The winding line of the W phase can be obtained by translating 12 conductor slots 810 in the direction of increasing the serial number of the conductor slots 810 of the winding line of the U phase. The entry positions of the two winding branches are the lines corresponding to "15.1" and "13.6", respectively. Figure 3 W1 and W2 in the figure; the outlet positions of the two winding branches are the lines corresponding to "40.6" and "42.1", refer to Figure 3 Z1 and Z2 in .

[0072] More specifically, when the winding circuit of each phase includes three winding branches, the first winding branch of the U phase is:

[0073] 1.6-10.5-1.4-10.3-1.2-10.1-20.1-11.2-20.3-11.4-20.5-11.6-21.6-30.5-21.4-30.3-21.2-30.1-37.1-28.2-37.3-28.4-37.5-28.6-38.6-47.5-38.4-47.3-38.2-47.1-3.1-48.2-3.3-48.4-3.5-48.6;

[0074] The second winding branch of phase U is:

[0075] 2.6-11.5-2.4-11.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-39.6-48.5-39.4-48.3-39.2-48.1-1.1-46.2-1.3-46.4-1.5-46.6;

[0076] The third winding branch of phase U is:

[0077] 3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-20.6-29.5-20.4-29.3-20.2-29.1-39.1-30.2-39.3-30.4-39.5-30.6-37.6-46.5-37.4-46.3-37.2-46.1-2.1-47.2-2.3-47.4-2.5-47.6.

[0078] like Fig.11 As shown, in this embodiment, it is exemplarily explained that, similarly, in the first winding branch of the U phase, the line corresponding to "1.6" represents the lead-in line 300, and the reference Figure 4 and Fig.11 The lines corresponding to "10.5-1.4", "10.3-1.2", "11.2-20.3", "11.4-20.5", "30.5-21.4", "30.3-21.2", "28.2-37.3", "28.4-37.5", "47.5-38.4", "47.3-38.2", "48.2-3.3" and "48.4-3.5" all represent the stacked coil 100; it is not difficult to see that in the first winding branch of the U phase, the stacked coil 100 has two line types, that is, the pitch is 9 slots and spans the second and third layers and the fourth and fifth layers. The lines corresponding to "10.1-20.1", "11.6-21.6", "30.1-37.1", "28.6-38.6" and "47.1-3.1" are all connecting coils 200; it is not difficult to see that in the first winding branch of the U phase, the connecting coil 200 has four line types, namely, a pitch of 7 slots and spanning the 1st layer and the 1st layer, a pitch of 10 slots and spanning the 1st layer and the 1st layer, a pitch of 7 slots and spanning the 6th layer and the 6th layer, and a pitch of 10 slots and spanning the 6th layer and the 6th layer. The line corresponding to "48.6" represents the lead-out line 400, refer to Figure 4 and Fig.11 X1 in.

[0079] It can be understood that when the U phase includes three winding branches, the two line types of the stacked coil 100 and the four line types of the connecting coil 200 are all included in the two line types of the stacked coil 100 and the six line types of the connecting coil 200 in the winding structure of two branches.

[0080] The second winding branch of phase U is similar, where the line corresponding to "2.6" represents the lead-in line 300, see Figure 4 U2 in the figure. The line corresponding to "46.6" indicates the lead wire 400, refer to Figure 4X2 in the figure. The same is true for the third winding branch of phase U, where the line corresponding to "3.6" represents the lead-in line 300, see Figure 4 U3 in the figure. The line corresponding to "47.6" indicates the lead wire 400, refer to Figure 4 X3 in.

[0081] The winding line of the V phase can be obtained by translating the winding line of the U phase by 6 conductor slots 810 in the direction of increasing conductor slot numbers. The entry positions of the three winding branches are the lines corresponding to "7.6", "8.6" and "9.6", respectively. Figure 4 V1, V2 and V3 in the figure; the outlet positions of the three winding branches are "52.6", "53.6" and "54.6" corresponding lines, refer to Figure 4 The winding line of the W phase can be obtained by translating 12 conductor slots 810 in the direction of increasing the serial number of the conductor slots 810 of the winding line of the U phase. The entry positions of the three winding branches are the lines corresponding to "13.6", "14.6" and "15.6", respectively. Figure 4 W1, W2 and W3 in the figure; the outlet positions of the three winding branches are the lines corresponding to "4.6", "5.6" and "6.6", respectively. Figure 4 Z1, Z2 and Z3 in .

[0082] Specifically, the multi-branch winding structure with centralized incoming and outgoing lines also includes a phase copper bar 500, which corresponds one-to-one to the three phases. The phase copper bar 500 includes a first copper bar piece 510 and a first terminal 520. The first terminal 520 corresponds one-to-one to and is connected to the incoming line positions of all winding branches of the phase corresponding to the phase copper bar 500, and the first copper bar piece 510 connects all the first terminals 520.

[0083] like Figure 3 , Figure 4 and Fig.12As shown, in this embodiment, it is exemplarily explained that the winding structure also includes a phase copper bar 500, and three phase copper bars 500 are provided, and correspond to the three phases of the stator assembly one by one. The phase copper bar 500 is used to connect all winding branches of the same phase in parallel, and includes a first copper bar piece 510 and a first terminal 520. The first copper bar piece 510 and the first terminal 520 can be integrally formed. The number of the first terminals 520 corresponds to the number of winding branches of the phase corresponding to the phase copper bar 500. For example, when each phase includes 2 winding branches, the first terminal 520 is set to 2. The first terminal 520 can be connected to the lead-in hairpin end 330 of the lead-in wire 300 of the corresponding winding branch. For example, in the winding structure of 2 branches, the two first terminals 520 of the phase copper bar 500 corresponding to U are respectively connected to the aforementioned U1 and U2. When connected, the first terminal 520 and the lead-in hairpin end 330 can be welded and fixed. The first copper bar 510 may be configured to be arc-shaped, which connects all the first terminals 520 .

[0084] It can be understood that, in this embodiment, by providing the lead-in wire 300 and reasonably arranging the structure of the lead-in wire 300, it is convenient to connect all winding branches of the same phase in parallel to obtain the desired winding structure.

[0085] More specifically, the multi-branch winding structure with centralized incoming and outgoing lines also includes a star-point copper busbar 600, which includes a second copper busbar 610 and a second terminal 620. The second terminal 620 corresponds to and is connected to the outgoing line positions of all winding branches of the three phases, and the second copper busbar 610 connects all the second terminals 620.

[0086] like Figure 3 , Figure 4 and Fig.13 As shown, in this embodiment, the winding structure also includes a star point copper bar 600, which can be set to only one, and is used to connect the outlet positions of all winding branches of the three phases. The star point copper bar 600 includes a second copper bar 610 and a second terminal 620, and the second copper bar 610 and the second terminal 620 can also be integrally formed. The number of second terminals 620 corresponds to the number of all winding branches of the three phases. For example, when each phase includes 2 winding branches, the second terminals 620 are provided with 3*2=6. The second terminal 620 can be connected to the lead-out terminal 430 of the lead-out wire 400 of the corresponding winding branch. For example, in the winding structure of 2 branches, the 6 second terminals 620 are respectively connected to the aforementioned X1, X2, Y1, Y2, Z1 and Z2. When connected, the second terminal 620 and the lead-out terminal 430 can be welded and fixed. The second copper bar 610 can be set to an arc shape, which connects all the second terminals 620.

[0087] It can be understood that, in this embodiment, by providing the lead wire 400 and reasonably arranging the structure of the lead wire 400, it is convenient to connect the lead wire positions of all winding branches of the three phases to obtain the required winding structure.

[0088] More specifically, the multi-branch winding structure with centralized incoming and outgoing lines further includes a structural member 700 , which fixes all the phase copper bars 500 together, or fixes all the phase copper bars 500 and the star point copper bar 600 together.

[0089] like Figure 1 As shown, in this embodiment, it is exemplarily explained that the structural member 700 can be made of injection molding material. When the star point copper bar 600 does not overlap with the three phase copper bars 500 and is far away from each other, the three phase copper bars 500 can be injection molded in the structural member 700 so that the three phase copper bars 500 are fixed together; and when the star point copper bar 600 overlaps with the three phase copper bars 500 or is close to each other, the three phase coppers and the star point copper bar 600 can be injection molded in the structural member 700 so that the three phase coppers and the star point copper bar 600 are fixed together. The three phase copper bars 500 fixed together, or the three phase copper bars 500 and the star point copper bar 600 form an integral busbar assembly. In the busbar assembly formed by the three phase copper bars 500 and the star point copper bar 600, the three phase copper bars 500 are insulated from the star point copper bar 600 to avoid short circuit. It is not difficult to understand that when the incoming and outgoing line positions are relatively concentrated, the sizes of the phase copper bus 500 and the star point copper bus 600 are relatively small, which makes it more convenient to prepare the busbar assembly; at the same time, the prepared busbar assembly is not prone to failure due to vibration during motor operation.

[0090] The implementation principle of a multi-branch winding structure with centralized input and output lines provided in the first embodiment of the present application is as follows:

[0091] When preparing the winding structure, the number of parallel winding branches of any phase of the winding structure is selected according to actual needs, and then the winding circuits of the three phases are wound on the stator core 800 according to the actual selection. For any winding branch, it is introduced with an introduction wire 300, and is lap-wound with a lap-wound coil 100, and a lap-wound winding is formed, and two adjacent lap-wound windings are connected with a connecting coil 200, and finally the lead-out wire 400 is used for lead-out. Subsequently, the three phase copper bars 500 and the star point copper bar 600 corresponding to the winding circuits of the three phases are prepared, and the three phase copper bars 500 and the star point copper bar 600 are fixed together by the structural member 700; then the phase copper bar 500 and the star point copper bar 600 are connected to the winding circuits of the three phases.

[0092] By reasonably setting the types and line types of U-shaped coils, the present application can make the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 2 parallel branches include all the types and line types of U-shaped coils in the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel branches, that is, the U-shaped coils used in the winding structure of 3 parallel branches are all from the winding structure of 2 parallel branches, so as to be compatible with the development of 54 slots, 6 poles, 6 layers, 3 parallel branches and 2 parallel branches. At the same time, by reasonably setting the line-in position and line-out position of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches, the present application can make the line-in position and line-out position of the three-phase winding structure of 54 slots, 6 poles, 6 layers, 3 parallel winding branches and 2 parallel winding branches relatively concentrated. Therefore, the present application can effectively improve the problem of concentrated incoming and outgoing lines in the existing technology of a three-phase winding structure with 54 slots, 6 poles and 6 layers, which is compatible with the development of parallel 2 branches and parallel 3 branches and has a shared coil.

[0093] Embodiment 2

[0094] Embodiment 2 of the present application provides a stator assembly, and the stator assembly includes any multi-branch winding structure with concentrated input and output lines provided in the present application.

[0095] Embodiment 3

[0096] Embodiment 3 of the present application provides a motor, which includes any stator assembly provided in the present application.

[0097] 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.

[0098] 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 multi-branch winding structure with centralized incoming and outgoing lines, characterized in that: The multi-branch winding structure with concentrated input and output lines is used for a stator assembly, the number of phases of the stator assembly is three phases, the number of poles is six poles, the stator assembly further comprises a stator core (800), the inner side of the stator core (800) is provided with 54 conductor slots (810) at equal intervals along the circumferential direction, the first layer, the second layer ... the sixth layer of the conductor slots (810) are arranged in sequence from the outside to the inside, the multi-branch winding structure with concentrated input and output lines comprises winding circuits of three phases in total, namely, U, V and W, the winding circuit of each phase is completely arranged in three consecutive conductor slots (810), and six conductor slots (810) are evenly spaced, the winding circuit of the V phase and the winding circuit of the W phase are obtained by translating the winding circuit of the U phase by six and 12 conductor slots (810) respectively along the same winding direction; The winding circuit of each phase comprises two winding branches, the line entry positions of the two winding branches are the first layer and the sixth layer of two conductor slots (810) arranged at intervals among three consecutive conductor slots (810), and the line exit positions of the two winding branches are the first layer and the sixth layer of two conductor slots (810) arranged at intervals among another three consecutive conductor slots (810); each winding branch comprises a plurality of stacked coils (100), the stacked coils (100) The coil (100) comprises two lapped effective sides (110), the lapped effective sides (110) being arranged in one of the slot layers of the conductor slots (810), the number of the conductor slots (810) spaced between the two lapped effective sides (110) of the lapped coil (100) being the pitch of the lapped coil (100), the lapped coil (100) having two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots and spanning the fourth and fifth layers, a plurality of the lapped coils (100) being connected to form a lapped winding group; each winding branch further comprises a connecting coil (200), the connecting coil (200) comprising two connecting effective sides (210), the connecting effective sides (210) also being arranged in one of the slot layers of the conductor slots (810), the connecting coil (200) connecting two adjacent lapped winding groups, the two connecting coils (200) The number of the conductor slots (810) connected to the effective edge (210) interval is the pitch of the connection coil (200), and the connection coil (200) has 6 line types: a pitch of 7 slots and spanning the 1st layer and the 1st layer, a pitch of 8 slots and spanning the 1st layer and the 1st layer, a pitch of 10 slots and spanning the 1st layer and the 1st layer, a pitch of 7 slots and spanning the 6th layer and the 6th layer, a pitch of 8 slots and spanning the 6th layer and the 6th layer, and a pitch of 10 slots and spanning the 6th layer and the 6th layer; Alternatively, the winding line of each phase includes three winding branches, the line entry positions of the three winding branches are the sixth layer of three consecutive conductor slots (810), and the line exit positions of the three winding branches are the sixth layer of another three consecutive conductor slots (810); each winding branch includes a plurality of stacked coils (100), the stacked coils (100) include two stacked effective edges (110), the stacked effective edges (110) are arranged in one slot layer of the conductor slots (810), the number of the conductor slots (810) spaced between the two stacked effective edges (110) of the stacked coil (100) is the pitch of the stacked coil (100), and the stacked coil (100) has two line types: a pitch of 9 slots and spanning the second and third layers, and a pitch of 9 slots and spanning the fourth layer. The invention relates to a method for producing a lap winding system, wherein the lap winding system comprises a first layer and a fifth layer, and a plurality of the lap winding coils (100) are connected to form a lap winding group; each winding branch further comprises a connecting coil (200), the connecting coil (200) comprises two connecting effective edges (210), the connecting effective edges (210) are also arranged in one of the slot layers of the conductor slots (810), the connecting coil (200) connects two adjacent lap winding groups, the number of the conductor slots (810) spaced between the two connecting effective edges (210) of the connecting coil (200) is the pitch of the connecting coil (200), and the connecting coil (200) has four line types: a pitch of 7 slots and spanning the first layer and the first layer, a pitch of 10 slots and spanning the first layer and the first layer, a pitch of 7 slots and spanning the sixth layer and the sixth layer, and a pitch of 10 slots and spanning the sixth layer and the sixth layer.

2. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 1 is characterized in that: The lapped coil (100) further comprises a lapped welding end (120) and a lapped hairpin end (130), wherein two lapped welding ends (120) are provided, and the two lapped welding ends (120) correspond to the two lapped effective edges (110) one by one and are provided at the same end of the two lapped effective edges (110), and the two lapped welding ends (120) extend in a direction approaching each other, and the lapped hairpin end (130) connects the other end of the two lapped effective edges (110). one end; the connecting coil (200) further comprises a connecting welding end (220) and a connecting hairpin end (230), two connecting welding ends (220) are provided, the two connecting welding ends (220) correspond one to one with the two connecting effective edges (210), and are provided at the same end of the two connecting effective edges (210), the two connecting welding ends (220) extend in the same direction, and the connecting hairpin end (230) connects the other ends of the two connecting effective edges (210).

3. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 2 is characterized in that: Each winding branch further comprises an introduction wire (300) and an outlet wire (400), wherein the introduction wire (300) comprises an introduction effective edge (310), an introduction welding end (320) and an introduction hairpin end (330); when the winding line of each phase comprises two winding branches, the introduction effective edge (310) is arranged on the first layer or the sixth layer of a conductor slot (810); when the winding line of each phase comprises three winding branches, the introduction effective edge (310) is arranged on the sixth layer of a conductor slot (810), and the introduction welding end (320) and the introduction hairpin end (330) are arranged on the first layer or the sixth layer of the conductor slot (810). The lead-out wire (400) includes an effective lead-out edge (410), a welding lead-out end (420) and a card lead-out end (430); when the winding line of each phase includes two winding branches, the effective lead-out edge (410) is arranged on the first layer or the sixth layer of a conductor slot (810); when the winding line of each phase includes three winding branches, the effective lead-out edge (410) is arranged on the sixth layer of a conductor slot (810); the welding lead-out end (420) and the card lead-out end (430) are arranged at both ends of the effective lead-out edge (410).

4. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 3 is characterized in that: When the winding circuit of each phase includes two winding branches, the first winding branch of the U phase is: 3.1-48.2-3.3-48.4-3.5-48.6-38.6-47.5-38.4-47.3-38.2-47.1-1.1-46.2-1.3-46.4-1.5-46.6-39.6-48.5-39.4-48.3-39.2-48.1-2.1-47.2-2.3-47.4-2.5-47.6-37.6-46.5-37.4-46.3-37.2-46.1-39.1-30.2-39.3-30.4-39.5-30.6-20.6-29.5-20.4-29.3-20.2-29.1-37.1-28.2-37.3-28.4-37.5-28.6； The second winding branch of the U phase is: 1.6-10.5-1.4-10.3-1.2-10.1-2.6-20.1-11.2-20.3-11.4-20.5-11.6-3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-2.6-11.5-2.4-11.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-21.6-30.5-21.4-30.3-21.2-30.1。 5. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 3, characterized in that: When the winding circuit of each phase includes three winding branches, the first winding branch of the U phase is: 1.6-10.5-1.4-10.3-1.2-10.1-20.1-11.2-20.3-11.4-20.5-11.6-21.6-30.5-21.4-30.3-21.2-30.1-37.1-28.2-37.3-28.4-37.5-28.6-38.6-47.5-38.4-47.3-38.2-47.1-3.1-48.2-3.3-48.4-3.5-48.6； The second winding branch of the U phase is: 2.6-11.5-2.4-11.3-2.2-11.1-21.1-12.2-21.3-12.4-21.5-12.6-19.6-28.5-19.4-28.3-19.2-28.1-38.1-29.2-38.3-29.4-38.5-29.6-39.6-48.5-39.4-48.3-39.2-48.1-1.1-46.2-1.3-46.4-1.5-46.6； The third winding branch of the U phase is: 3.6-12.5-3.4-12.3-3.2-12.1-19.1-10.2-19.3-10.4-19.5-10.6-20.6-29.5-20.4-29.3-20.2-29.1-39.1-30.2-39.3-30.4-39.5-30.6-37.6-46.5-37.4-46.3-37.2-46.1-2.1-47.2-2.3-47.4-2.5-47.6。 6. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 1, characterized in that: The multi-branch winding structure with centralized incoming and outgoing lines also includes a phase copper bar (500), the phase copper bar (500) corresponds one-to-one to the three phases, the phase copper bar (500) includes a first copper bar piece (510) and a first terminal (520), the first terminal (520) corresponds one-to-one to and is connected to the incoming line positions of all winding branches of the phase corresponding to the phase copper bar (500), and the first copper bar piece (510) is connected to all the first terminals (520).

7. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 6, characterized in that: The multi-branch winding structure with centralized incoming and outgoing lines also includes a star point copper bar (600), the star point copper bar (600) includes a second copper bar piece (610) and a second terminal (620), the second terminal (620) corresponds to and is connected to the outgoing line positions of all winding branches of the three phases, and the second copper bar piece (610) connects all the second terminals (620).

8. The multi-branch winding structure with concentrated incoming and outgoing lines according to claim 7, characterized in that: The multi-branch winding structure with concentrated incoming and outgoing lines further comprises a structural member (700), wherein the structural member (700) fixes all the phase copper bars (500) together, or fixes all the phase copper bars (500) and the star point copper bar (600) together.

9. A stator assembly, characterized in that: The stator assembly comprises a multi-branch winding structure with concentrated incoming and outgoing lines as described in any one of claims 1 to 8.

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

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