Multi-branch winding structure, stator assembly and motor

Abstract

The invention relates to a multi-branch winding structure, a stator assembly and a motor, the multi-branch winding structure comprises winding circuits of three phases and star point copper bars, and the winding circuit of any phase comprises n winding branches connected in parallel; the wire outlet positions of the 3n winding branches of the three phases are sequentially arranged at intervals in the circumferential direction of the iron core part, three continuous wire outlet positions in the circumferential direction of the iron core part correspond to one winding branch of the three phases respectively, and at least two wire outlet positions correspond to different winding branches of the three phases; the number of the star point copper bars is n, any star point copper bar is connected with three continuous wire outlet positions in the circumferential direction of the iron core piece, and the n star point copper bars are arranged at intervals in the circumferential direction. According to the star-point copper bar, the situation of interference between the star-point copper bars in the circumferential direction can be reduced, so that the bending portions of the star-point copper bars are reduced, meanwhile, the situation that every two adjacent star-point copper bars are arranged in a staggered mode in the radial direction is avoided, the structure of the star-point copper bars is simplified, and the vibration resistance of the star-point copper bars is improved.

Description

Technical Field

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

[0002] like Figure 1 As shown, the stator assembly of the motor may include an iron core 400 and a winding structure wound on the iron core 400. Figure 2 , wherein the winding structure can be a three-phase winding structure, which can include winding circuits of three phases, and the winding circuits of the three phases can be connected to the star point copper bus 100 to form a three-phase circuit. As for the winding circuit of each phase, it can include several parallel winding branches; when the star point copper bus 100 is connected, it can adopt a star connection method to reduce the span of the star point copper bus 100 along the circumferential direction and thereby achieve the purpose of reducing the size of the star point copper bus 100. In detail, the star point copper bus 100 can correspond one-to-one to several winding branches, and the star point copper bus 100 can be connected to the outlet positions of the same winding branch corresponding to the three phases. As Figure 2 As shown, for example, the three phases of the winding structure are U phase, V phase and W phase, and each phase includes 4 winding branches. The outgoing line positions of the 4 winding branches of U phase are X1, X2, X3 and X4, the outgoing line positions of the 4 winding branches of V phase are Y1, Y2, Y3 and Y4, and the outgoing line positions of the 4 winding branches of W phase are W1, W2, W3 and W4; at this time, the star point copper busbars 100 are set to 4 to correspond to the 4 winding branches, and the star point copper busbar 100 corresponding to the first winding branch is connected to X1, Y1 and Z1, and the other 3 star point copper buses 100 are connected in the same way. However, in the prior art winding structure, the outlet positions of the same winding branch of the three phases are arranged non-continuously along the circumferential direction. For example, there is X2 between "Y1 and Z1" in X1, Y1 and Z1 of the same winding branch. In this case, the four star-point copper bars 100 overlap along the circumferential direction. To avoid short circuits, the four star-point copper bars 100 need to be arranged at intervals. Common methods include partially bending the star-point copper bar 100 and radially staggering two adjacent star-point copper bars 100. This makes the structure of the star-point copper bar 100 complex, thereby reducing the vibration resistance of the star-point copper bar 100 and increasing the scrap rate during stamping. Summary of the Invention

[0003] Based on this, the present application provides a multi-branch winding structure, a stator assembly and a motor to improve the problem in the prior art that the three-phase winding branches of the winding structure are connected to the star-point copper bus using a star connection method, which results in a complex structure of the star-point copper bus, reduced vibration resistance of the star-point copper bus, and a high scrap rate during stamping.

[0004] In a first aspect, the present application provides a multi-branch winding structure, which is used for a stator assembly. The stator assembly further includes an iron core member. The multi-branch winding structure is arranged on the iron core member. The multi-branch winding structure includes winding lines of three phases and a star-point copper bar. The winding line of any one phase includes n parallel winding branches, where n is a positive integer not less than 2. The outgoing positions of the 3n winding branches in total of the three phases are arranged at intervals in sequence along the circumferential direction of the iron core member. Three consecutive outgoing positions along the circumferential direction of the iron core member respectively correspond to one of the winding branches of the three phases, and at least 2 of the outgoing positions correspond to different winding branches of the three phases. The number of the star-point copper bars is n. Any one of the star-point copper bars is connected to three consecutive outgoing positions along the circumferential direction of the iron core member, and the n star-point copper bars are arranged at intervals in the circumferential direction.

[0005] In one embodiment, the star-point copper bar includes a first copper bar member and copper bar terminals. There are 3 copper bar terminals, which are respectively connected to one of the outgoing positions, and the first copper bar member connects the 3 copper bar terminals.

[0006] In one embodiment, the winding lines of the three phases are wound on the iron core member to form a winding body structure. Both ends of the winding body structure along the axial direction of the iron core member extend outside the iron core member, and the star-point copper bar is arranged on one side of the end face of the winding body structure.

[0007] In one embodiment, the outgoing positions of the 3n winding branches in total of the three phases are arranged at the innermost or outermost side in the radial direction of the winding body structure, and the first copper bar member is arranged at the middle position in the radial direction of the winding body structure.

[0008] In one embodiment, the multi-branch winding structure further includes phase copper bars. There are 3 phase copper bars, which correspond to the three phases one by one, and the phase copper bars are connected to the incoming positions of the n winding branches of the corresponding phases.

[0009] In one embodiment, the phase copper bar includes a second copper bar member and busbars. There are n busbars, and the n winding branches of the phase corresponding to the phase copper bar correspond to the n busbars of the phase copper bar one by one. One end of the busbar is connected to the incoming position of the winding branch, and the second copper bar member connects the other ends of the n busbars of the phase copper bar.

[0010] In one embodiment, at least the middle parts of the busbars extend along the circumferential direction of the winding body structure, and are all arranged on the outer peripheral side of the end part of the winding body structure.

[0011] In one embodiment, the three phases of the multi-branch winding structure are the U phase, the V phase, and the W phase respectively. The iron core member is provided with 60 stator slots along the circumferential direction. Each stator slot is sequentially provided with 8 slot layers, namely L1-L8, along the radial direction of the iron core member, n = 4. The first winding branch of the U phase is:

[0012] 1L1-13L2-2L1-14L2-3L1-15L2-4L1-16L2-5L1-17L2-5L3-17L4-4L3-16L4-3L3-15L4-2L3-14L4-1L3-13L4-1L5-13L6-2L5-14L6-3L5-15L6-4L5-16L6-5L5-17L6-5L7-17L8-4L7-16L8-3L7-15L8-2L7-14L8-1L7-13L8;

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

[0014] 28L8-16L7-29L8-17L7-30L8-18L7-31L8-19L7-32L8-20L7-32L6-20L5-31L6-19L5-30L6-18L5-29L6-17L5-28L6-16L5-28L4-16L3-29L4-17L3-30L4-18L3-31L4-19L3-32L4-20L3-32L2-20L1-31L2-19L1-30L2-18L1-29L2-17L1-28L2-16L1;

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

[0016] 31L1-43L2-32L1-44L2-33L1-45L2-34L1-46L2-35L1-47L2-35L3-47L4-34L3-46L4-33L3-45L4-32L3-44L4-31L3-43L4-3L5-43L6-32L5-44L6-33L5-45L6-34L5-46L6-35L5-47L6-35L7-47L8-34L7-46L8-33L7-45L8-32L7-44L8-31L7-43L8;

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

[0018] 58L8-46L7-59L8-47L7-60L8-48L7-61L8-49L7-62L8-50L7-62L6-50L5-61L6-49L5-60L6-48L5-59L6-47L5-58L6-46L5-58L4-46L3-59L4-47L3-60L4-48L3-61L4-49L3-62L4-50L3-62L2-50L1-61L2-49L1-60L2-48L1-59L2-47L1-58L2-46L1;

[0019] The winding circuit of the V phase and the winding circuit of the U phase are respectively obtained by translating the winding circuit of the U phase by 10 and 20 stator slots in sequence.

[0020] In a second aspect, the present application provides a stator assembly, and the stator assembly includes any one of the multi-branch winding structures provided by the present application.

[0021] In a third aspect, the present application provides an electric motor, and the electric motor includes any one of the stator assemblies provided by the present application.

[0022] By connecting the star point copper bars to the outgoing line positions of different winding branches of the three phases, when the outgoing line positions of the 3n winding branches of the three phases in the multi-branch winding structure are such that every consecutive 3 outgoing line positions in the circumferential direction correspond to one winding branch of the three phases and at least 2 winding branches are different winding branches of the three phases, the circumferential interference between the star point copper bars can be reduced, so as to reduce the bending parts of the star point copper bars, and at the same time avoid arranging two adjacent star point copper bars in a radially misaligned manner, thereby simplifying the structure of the star point copper bars, improving the vibration resistance of the star point copper bars, and facilitating the stamping process of the star point copper bars. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a stator assembly provided by the prior art;

[0024] Figure 2 It is a winding diagram of a multi-branch winding structure provided by the prior art;

[0025] Figure 3 It is a winding diagram of the multi-branch winding structure provided in Embodiment 1 of the present application when showing the star point copper bars;

[0026] Figure 4 It is a schematic structural diagram of a stator assembly applicable to the multi-branch winding structure provided in Embodiment 1 of the present application;

[0027] Figure 5 It is a schematic structural diagram of the star point copper bar of the multi-branch winding structure provided in Embodiment 1 of the present application;

[0028] Figure 6 For Figure 4 An enlarged view of part A in

[0029] Figure 7 The winding diagram when showing the phase copper bar of the multi-branch winding structure provided in the first embodiment of the present application;

[0030] Figure 8 The structural schematic diagram of the phase copper bar of the multi-branch winding structure provided in the first embodiment of the present application;

[0031] Figure 9 The winding diagram of the winding line of phase U of the multi-branch winding structure provided in the first embodiment of the present application;

[0032] Figure 10 The structural schematic diagram of the stacked winding coil of the multi-branch winding structure provided in the first embodiment of the present application.

[0033] Reference numerals: 100, star point copper bar; 110, first copper bar member; 120, copper bar terminal; 200, phase copper bar; 210, second copper bar member; 220, bus bar; 230, fixing structure; 300, winding body structure; 310, stacked winding coil; 311, stacked effective side; 312, stacked welding end; 313, stacked hairpin end; 320, welding terminal; 400, iron core member; 410, stator slot. Detailed implementation manners

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the 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.

[0035] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner.

[0036] The structures, ratios, sizes, etc. depicted in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0037] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] Embodiment 1

[0039] Embodiment 1 of the present application provides a multi-branch winding structure, as Figures 3 to 10 shown, the multi-branch winding structure is used for a stator assembly, the stator assembly further includes a core member 400, the multi-branch winding structure is arranged on the core member 400, the multi-branch winding structure includes winding lines of three phases and a neutral copper bar 100, any one of the winding lines includes n parallel winding branches, where n is a positive integer; the outlet positions of the 3n winding branches of the three phases are sequentially arranged at intervals along the circumferential direction of the core member 400, and 3 consecutive outlet positions along the circumferential direction of the core member 400 respectively correspond to one of the winding branches of the three phases, and at least 2 of the outlet positions correspond to different winding branches of the three phases; the number of neutral copper bars 100 is n, and any one of the neutral copper bars 100 is connected to 3 consecutive outlet positions along the circumferential direction of the core member 400, and the n neutral copper bars 100 are arranged at intervals along the circumferential direction.

[0040] As Figure 3 and Figure 4 shown, in this embodiment, by way of example, the stator assembly may include a core member 400 and a winding structure wound on the core member 400. The number of phases of the stator assembly may be three phases, and correspondingly, the winding structure may include winding lines of three phases. For any one of the winding lines, it includes n parallel winding branches, where n is a positive integer not less than 2, such as n = 2, 3, or 4, etc., so that the winding structure constitutes a multi-branch winding structure. And for any one of the winding branches, it may include a plurality of hairpin coils, and the plurality of hairpin coils are sequentially connected to each other. Of course, in some embodiments, any one of the winding branches may also be continuously wound by one or several conductors.

[0041] As Figure 3As shown, any winding branch leads out from the lead-out position during winding. It is not difficult to see that a total of 3n winding lines for the three phases can form 3n lead-out positions arranged at intervals in the circumferential direction of the iron core member 400. Among the 3n lead-out positions arranged at intervals in the circumferential direction of the iron core member 400, three consecutive lead-out positions respectively correspond to one winding branch of the three phases, and at least 2 lead-out positions correspond to different winding branches of the three phases. Among the total of 3n winding branches for the three phases, the 3 first winding branches of the three phases are the same winding branch, and any second winding branch of the three phases is a different winding branch from the other 2 first winding branches.

[0042] As Figure 3 shown, for example, the three phases of the stator assembly can be the U phase, the V phase, and the W phase respectively. The winding line of any phase includes 4 winding branches; the 4 winding branches of the U phase can be U1X1, U2X2, U3X3, and U4X4 respectively, the 4 winding branches of the V phase can be V1Y1, V2Y2, V3Y3, and V4Y4 respectively, and the 4 winding branches of the W phase can be W1Z1, W2Z2, W3Z3, and W4Z4 respectively. Among them, U1X1, V1Y1, and W1Z1 are respectively the first winding branches of the U phase, the V phase, and the W phase, so U1X1, V1Y1, and W1Z1 form the same winding branch. And U1X1 and V1Y1 are respectively the first winding branches of the U phase and the V phase, and W2Z2 is the second winding branch of the W phase, so U1X1 and V1Y1 and W2Z2 form different winding branches. Furthermore, U1X1 is the first winding branch of the U phase, V2Y2 is the second winding branch of the V phase, and W3Z3 is the third winding branch of the W phase, so U1X1, V2Y2, and W3Z3 are different from each other in winding branches.

[0043] Among them, the lead-out positions of the 4 winding branches of the U phase can be X1, X2, X3, and X4 respectively, the lead-out positions of the 4 winding branches of the V phase are Y1, Y2, Y3, and Y4, and the lead-out positions of the 4 winding branches of the W phase are Z1, Z2, Z3, and Z4. For example, three consecutive lead-out positions in the circumferential direction of the iron core member 400 can be X1, Y2, and Z1, which respectively correspond to the U phase, the V phase, and the W phase, and the U phase and the V phase and the W phase are different winding branches. Three consecutive lead-out positions in the circumferential direction of the iron core member 400 can also be X1, Y2, and Z3, which respectively correspond to the U phase, the V phase, and the W phase, and the U phase, the V phase, and the W phase are different from each other in winding branches.

[0044] As Figure 3 and Figure 4As shown, in this embodiment, the multi-branch winding structure may further include a star point copper bar 100. The star point copper bar 100 is used to connect to the outgoing line positions of the winding branches of three phases, so that the winding lines of the three phases form a three-phase circuit. The number of star point copper bars 100 may be the same as the number of winding branches of any one phase, that is, set to n. The outgoing line positions of a total of 3n winding branches of the three phases can be grouped into n groups with every consecutive 3 as a group. The n groups of outgoing line positions correspond one-to-one with the n star point copper bars 100, and the star point copper bar 100 is connected to its corresponding 3 outgoing line positions; and the n star point copper bars 100 are also arranged at circumferential intervals along the iron core member 400.

[0045] It can be understood that in this application, by connecting the star point copper bar 100 to the outgoing line positions of different winding branches of the three phases, when the outgoing line positions of a total of 3n winding branches of the three phases in the multi-branch winding structure are such that every consecutive 3 outgoing line positions in the circumferential direction correspond to one winding branch of the three phases and at least 2 winding branches are different winding branches of the three phases, the circumferential interference between the star point copper bars 100 can be reduced, so as to reduce the bending parts of the star point copper bars 100, and at the same time to avoid arranging two adjacent star point copper bars 100 in a radial misalignment manner, thereby simplifying the structure of the star point copper bars 100, improving the vibration resistance of the star point copper bars 100, and facilitating the stamping process of the star point copper bars 100.

[0046] Specifically, the star point copper bar 100 includes a first copper bar member 110 and copper bar terminals 120. There are 3 copper bar terminals 120, which are respectively connected to one outgoing line position, and the first copper bar member 110 connects the 3 copper bar terminals 120.

[0047] Such as Figure 3 and Figure 5 As shown, in this embodiment, by way of example, the star point copper bar 100 may include a first copper bar member 110 and copper bar terminals 120, and the first copper bar member 110 and the copper bar terminals 120 may be integrally formed. There are 3 copper bar terminals 120, which are respectively connected in one-to-one correspondence with the 3 outgoing line positions corresponding to the star point copper bar 100. For example, the 3 copper bar terminals 120 of the star point copper bar 100 corresponding to the outgoing line positions X1, Y2, and Z1 are respectively connected to X1, Y2, and Z1, and the connection method may be welding. The first copper bar member 110 is connected to all 3 copper bar terminals 120, so that the outgoing line positions of these 3 winding branches form a "star point".

[0048] It can be understood that in this embodiment, by setting the star point copper bar 100 to 3 copper bar terminals 120 and the first copper bar member 110 connecting the 3 copper bar terminals 120, the star point copper bar 100 can have a relatively simple structure, which is convenient for its preparation and processing when the star point copper bar 100 adopts a stamping process, and at the same time reduces its scrap rate.

[0049] More specifically, the winding lines of the three phases are wound on the iron core member 400 to form a winding body structure 300. The two ends of the winding body structure 300 along the axial direction of the iron core member 400 extend out of the iron core member 400, and the star point copper bar 100 is disposed on one side of the end face of the winding body structure 300.

[0050] As Figure 4 shown, in this embodiment, for exemplary illustration, when the winding lines of the three phases are all wound on the iron core member 400, the winding lines of the three phases can form a winding body structure 300. The winding body structure 300 can be coaxially arranged with the iron core member 400, and the two ends of the winding body structure 300 along the axial direction can extend out of the iron core member 400. The star point copper bar 100 can be disposed at one end of the winding body structure 300 formed by the winding lines of the three phases and is located on one side of its end face.

[0051] It can be understood that in this embodiment, by disposing the star point copper bar 100 on one side of the end face of the winding body structure 300 formed by the winding lines of the three phases, it is convenient to connect the star point copper bar 100 to the outgoing line positions of the winding lines of the three phases.

[0052] More specifically, the outgoing line positions of a total of 3n winding branches of the three phases are disposed at the innermost or outermost side in the radial direction of the winding body structure 300, and the first copper bar member 110 is disposed at the middle position in the radial direction of the winding body structure 300.

[0053] As Figure 4 and Figure 6 shown, in this embodiment, for exemplary illustration, for any winding branch, its outgoing line position can extend a small distance along the axial direction of the winding body structure 300 to form a welding terminal 320. The outgoing line positions of a total of 3n winding branches of the three phases can be disposed at the innermost or outermost side in the radial direction of the winding body structure 300, that is, the welding terminals 320 can be disposed at the innermost or outermost side in the radial direction of the winding body structure 300; for example, when n = 4, among the outgoing line positions of the 4 winding branches of the winding line of any phase, 2 are located at the innermost side in the radial direction of the winding body structure 300, and the other 2 are located at the outermost side in the radial direction of the winding body structure 300. When the star point copper bar 100 is connected to the outgoing line position of its corresponding winding branch, specifically, the copper bar terminal 120 can be connected to the welding terminal 320, and the connection method can also be welding. At this time, the first copper bar member 110 can be arranged between the innermost and outermost sides in the radial direction of the winding body structure 300, that is, at the middle position in the radial direction of the winding body structure 300; and the copper bar terminal 120 can be arranged in the width direction of the first copper bar member 110 to facilitate connection with the welding terminal 320.

[0054] It can be understood that in this embodiment, by setting the outlet positions of the 3n winding branches in total of the three phases at the innermost or outermost side in the radial direction of the winding body structure 300, and setting the first copper busbar 110 at the middle position in the radial direction of the winding body structure 300, it is convenient to arrange the star point copper busbar 100 on one side of the end face of the winding body structure 300 formed by the winding lines of the three phases, so as to realize the stable connection between the star point copper busbar 100 and the winding lines of the three phases, and further improve the vibration resistance of the star point copper busbar 100.

[0055] More specifically, the multi-branch winding structure further includes phase copper busbars 200. The phase copper busbars 200 are provided in 3 numbers and correspond one by one to the three phases. The phase copper busbars 200 are connected to the inlet positions of the n winding branches of the corresponding phases.

[0056] As Figure 4 and Figure 7 shown, in this embodiment, by way of example, the multi-branch winding structure further includes phase copper busbars 200. The phase copper busbars 200 are used to connect to the inlet positions of the winding branches of the three phases, so that the winding lines of the three phases form a three-phase circuit. The number of the phase copper busbars 200 can correspond to the number of phases, that is, 3 are provided. The phase copper busbars 200 are connected to the inlet positions of the n winding branches of the corresponding phases, so that the n winding branches of this phase are in parallel.

[0057] In the foregoing example, when the winding line of any phase includes 4 winding branches, and the 4 winding branches of the U phase can be U1X1, U2X2, U3X3 and U4X4 respectively, the 4 winding branches of the V phase can be V1Y1, V2Y2, V3Y3 and V4Y4 respectively, and the 4 winding branches of the W phase can be W1Z1, W2Z2, W3Z3 and W4Z4 respectively, the inlet positions of the 4 winding branches of the U phase can be U1, U2, U3 and U4 respectively, the inlet positions of the 4 winding branches of the V phase are V1, V2, V3 and V4, the inlet positions of the 4 winding branches of the W phase are W1, W2, W3 and W4, and the phase copper busbar 200 corresponding to the U phase can be called the U-phase copper busbar 200, which is connected to W1, W2, W3 and W4.

[0058] It can be understood that in this embodiment, by setting the phase copper busbars 200, it is convenient to form a three-phase circuit in the multi-branch winding structure, so that the multi-branch winding structure meets the use requirements.

[0059] More specifically, the phase copper busbar 200 includes a second copper busbar 210 and a bus bar 220. The bus bar 220 is provided in n numbers, and the n winding branches of the phase corresponding to the phase copper busbar 200 correspond one by one to the n bus bars 220 of the phase copper busbar 200. One end of the bus bar 220 is connected to the inlet position of the winding branch, and the second copper busbar 210 is connected to the other ends of the n bus bars 220 of the phase copper busbar 200.

[0060] As Figure 7 and Figure 8 shown, in this embodiment, by way of example, the phase copper busbar 200 may include a second copper busbar member 210 and a busbar 220. The busbar 220 may be provided in n pieces and correspond one by one to the n winding branches of the phase copper busbar 200; one end of the busbar 220 may be connected to the incoming line position of the corresponding winding branch, and the connection method may be fixed by welding. The second copper busbar member 210 then connects the other ends of the n busbars 220 to achieve the purpose of paralleling the n winding branches; the connection method between the second copper busbar member 210 and the other ends of the busbars 220 may also be welding.

[0061] It can be understood that in this embodiment, by setting the star point copper busbar 100 as n busbars 220 and the second copper busbar member 210 for connecting the ends of the n busbars 220, it is convenient for the second copper busbar member 210 to be connected to the incoming line positions of the n winding branches of its corresponding phase.

[0062] More specifically, at least the middle part of the busbar 220 extends along the circumferential direction of the winding body structure 300 and is arranged on the outer peripheral side of the end of the winding body structure 300.

[0063] As Figure 4 shown, in this embodiment, by way of example, the busbar 220 may be set as a circular strip structure, which may be made of a conductive material and has elasticity. For example, the busbar 220 is a circular strip structure made of copper material. The second copper busbar members 210 of the three phase copper busbars 200 may be arranged adjacent to each other along the circumferential direction of the winding body structure 300 for convenient centralized extraction. The busbar 220 may extend from the second copper busbar member 210 to the incoming line position of its corresponding winding branch. When extending, the middle part of the busbar 220 may extend along the circumferential direction of the winding body structure 300 and be arranged on the outer peripheral side of the end of the winding body structure 300. To prevent the busbar 220 from contacting the winding body structure 300 and causing a short circuit, the busbar 220 may also be spaced from the winding body structure 300 through a fixing structure 230, and the fixing structure 230 may be an insulating component formed by injection molding. When several busbars 220 are extending, the fixing structure 230 may also connect several busbars 220 of different phases at the same time and space several busbars 220 of different phase copper busbars 200. At this time, the fixing structure 230 may further improve the stability when the three phase copper busbars 200 are connected to the winding lines of the three phases. For any winding branch, its incoming line position may also extend a short distance along the axial direction of the winding body structure 300 to form the aforementioned welding terminal 320; when the phase copper busbar 200 is connected to the winding branch, specifically, the end of the busbar 220 may be connected to the welding terminal 320, and the connection method may also be welding.

[0064] As Figure 4 and Figure 5 shown, in this embodiment, when n = 4 and among the wire-in positions of the 4 winding branches of the winding line of any phase, 2 are also located at the innermost side in the radial direction of the winding body structure 300, while the other 2 are located at the outermost side in the radial direction of the winding body structure 300, the busbar 220 connected to the 2 wire-in positions located at the innermost side in the radial direction of the winding body structure 300 needs to span across the winding body structure 300 in the radial direction, that is, it needs to extend from the outermost side to the innermost side of the winding body structure 300, and there will be an interference situation with the star point copper bar 100. At this time, the first copper bar part 110 of the star point copper bar 100 can be bent along the axial direction of the winding body structure 300, and the busbar 220 can pass through directly below the bending part of the first copper bar part 110. Of course, in some embodiments, the busbar 220 can also pass over the first copper bar part 110 directly above. And the busbar 220 connected to the 2 wire-in positions located at the outermost side in the radial direction of the winding body structure 300 does not need to span across the winding body structure 300 in the radial direction, so there is no interference between it and the star point copper bar 100.

[0065] It can be understood that in this embodiment, by extending the middle part of the busbar 220 along the circumferential direction of the winding body structure 300 and arranging it on the outer peripheral side of the winding body structure 300, the interference between the phase copper bar 200 and the star point copper bar 100 arranged on one side of the end face of the winding body structure 300 can be minimized, so that at least the star point copper bar 100 has a relatively simple structure and is easier to remain stable after being connected to the winding lines of three phases, and at the same time, it is convenient for its processing.

[0066] More specifically, the three phases of the multi-branch winding structure are the U phase, the V phase, and the W phase respectively. The iron core part 400 is provided with 60 stator slots 410 along the circumferential direction. Each stator slot 410 is sequentially provided with 8 slot layers L1 - L8 along the radial direction of the iron core part 400. n = 4, and the first winding branch of the U phase is:

[0067] 1L1 - 13L2 - 2L1 - 14L2 - 3L1 - 15L2 - 4L1 - 16L2 - 5L1 - 17L2 - 5L3 - 17L4 - 4L3 - 16L4 - 3L3 - 15L4 - 2L3 - 14L4 - 1L3 - 13L4 - 1L5 - 13L6 - 2L5 - 14L6 - 3L5 - 15L6 - 4L5 - 16L6 - 5L5 - 17L6 - 5L7 - 17L8 - 4L7 - 16L8 - 3L7 - 15L8 - 2L7 - 14L8 - 1L7 - 13L8;

[0068] The second winding branch of the U phase is:

[0069] 28L8-16L7-29L8-17L7-30L8-18L7-31L8-19L7-32L8-20L7-32L6-20L5-31L6-19L5-30L6-18L5-29L6-17L5-28L6-16L5- 28L4-16L3-29L4-17L3-30L4-18L3-31L4-19L3-32L4-20L3-32L2-20L1-31L2-19L1-30L2-18L1-29L2-17L1-28L2-16L1;

[0070] The third winding branch of phase U is:

[0071] 31L1-43L2-32L1-44L2-33L1-45L2-34L1-46L2-35L1-47L2-35L3-47L4-34L3-46L4-33L3-45L4-32L3-44L4-31L3-43L4 -3L5-43L6-32L5-44L6-33L5-45L6-34L5-46L6-35L5-47L6-35L7-47L8-34L7-46L8-33L7-45L8-32L7-44L8-31L7-43L8;

[0072] The fourth winding branch of phase U is:

[0073] 58L8-46L7-59L8-47L7-60L8-48L7-61L8-49L7-62L8-50L7-62L6-50L5-61L6-49L5-60L6-48L5-59L6-47L5-58L6-46L5- 58L4-46L3-59L4-47L3-60L4-48L3-61L4-49L3-62L4-50L3-62L2-50L1-61L2-49L1-60L2-48L1-59L2-47L1-58L2-46L1;

[0074] The V-phase winding circuit and the U-phase winding circuit are obtained by sequentially shifting the U-phase winding circuit by 10 and 20 stator slots 410 respectively.

[0075] like Figure 3 As shown, in this embodiment, the three phases of the multi-branch winding structure can be respectively U-phase, V-phase, and W-phase, where "U", "V", and "W" are only used to facilitate the description of the three phases of the multi-branch winding structure and are not used to limit them in any way. In some embodiments, the three phases of the multi-branch winding structure can also be represented by other symbols.

[0076] In this embodiment, the iron core member 400 may be provided with 60 stator slots 410 at equal intervals in the circumferential direction, and the middle part of the winding body structure 300 formed by the winding lines of three phases is arranged in the stator slots 410. Similarly, the serial numbers "1" - "60" are only for facilitating the description of the 60 stator slots 410 of the iron core member 400, and are not used for any limitation thereof. At the same time, any stator slot 410 in the circumferential direction of the iron core member 400 may be used as the stator slot 410 with the serial number "1".

[0077] As Figure 3 shown, in this embodiment, any stator slot 410 is provided with a total of 8 slot layers L1 - L8 along the radial direction of the iron core member 400, and the slot layers L1 to L8 may be arranged in sequence from the inside to the outside in the radial direction of the iron core member 400. Similarly, "L1" - "L8" are only for facilitating the description of the 8 slot layers of the stator slot 410, and are not used for any limitation thereof. In some embodiments, the 8 slot layers of the stator slot 410 may also be represented by other markings.

[0078] As Figure 9 [[ID=!0]]and Figure 10 shown, in this embodiment, any winding branch may include a plurality of hairpin coils. Hereinafter, the first winding branch of the U phase will be taken as an example for illustration. The first winding branch of the U phase may adopt an overlapping winding method. At this time, the hairpin coil is an overlapping coil 310, which includes integrally formed overlapping effective sides 311, overlapping welding ends 312, and overlapping hairpin ends 313. The overlapping effective sides 311 are provided in two, and the two overlapping effective sides 311 are arranged in parallel. The overlapping welding ends 312 are provided in two, and the two overlapping welding ends 312 correspond to the two overlapping effective sides 311 one by one, and the two overlapping welding ends 312 are arranged at the same end of the two overlapping effective sides 311 and extend in the direction of approaching each other. The overlapping hairpin end 313 is provided in one, and it may be set in a shape similar to a "V" shape, and the two ends of the opening of its "V" shape may be respectively connected to the other ends of the two overlapping effective sides 311. During winding, the two overlapping effective sides 311 of the overlapping coil 310 respectively correspond to two stator slots 410, and the overlapping effective sides 311 are arranged in the stator slots 410; and the number of stator slots 410 spaced between the two stator slots 410 is the pitch of the overlapping coil 310. The overlapping hairpin ends 313 of a plurality of overlapping coils 310 are all arranged outside the same end of the iron core member 400, and the overlapping welding ends 312 of a plurality of overlapping coils 310 are all arranged outside the other end of the iron core member 400. Two consecutive overlapping coils 310 are respectively connected through one of their overlapping welding ends 312, and the two overlapping welding ends 312 may adopt a welding connection method.

[0079] As Figure 9As shown, in the first winding branch of the U phase, the winding line corresponding to "1L1 - 13L2" represents the first stacked winding coil 310. Its two stacked effective sides 311 are respectively wound in the L1 slot layer numbered "1" and the L2 slot layer numbered "13", and its pitch is 12 slots. Similarly, for the subsequent winding lines, among which the winding line corresponding to "1L7 - 13L8" represents the last stacked winding coil 310. Its two stacked effective sides 311 are respectively wound in the L7 slot layer numbered "1" and the L8 slot layer numbered "13", and its pitch is 12 slots. It should be noted that the incoming line position of the first winding branch of the U phase is the stacked winding welding end 312 of the first stacked winding coil 310 near the stacked effective side 311 represented by "1L1". Refer to Figure 5 U1 in. This stacked winding welding end 312 extends a short distance axially to form a welding terminal 320 for facilitating the connection of the bus bar 220. And the outgoing line position of the first winding branch of the U phase is the stacked winding welding end 312 of the last stacked winding coil 310 near the stacked effective side 311 represented by "13L8". Refer to Figure 5 X1 in. This stacked winding welding end 312 also extends a short distance axially to form a welding terminal 320 for facilitating the connection of the copper bar terminal 120.

[0080] As Figure 9 shown, the same applies to the second, third, and fourth winding branches of the U phase. Among them, the incoming line position and the outgoing line position of the second winding branch of the U phase refer to Figure 9 U2 and X2 in respectively. The incoming line position and the outgoing line position of the third winding branch of the U phase refer to Figure 9 U3 and X3 in respectively. The incoming line position and the outgoing line position of the fourth winding branch of the U phase refer to Figure 9 U4 and X4 in respectively.

[0081] As Figure 3 shown, the winding line of the V phase and the winding line of the U phase can be obtained by translating the winding line of the U phase by 10 and 20 stator slots 410 in sequence respectively. The winding line of the V phase and the winding line of the U phase are obtained in the same way. Among them, the incoming line position and the outgoing line position of the first winding branch of the V phase refer to Figure 3 V1 and Y1 in respectively. The incoming line position and the outgoing line position of the second winding branch of the V phase refer to Figure 3 V2 and Y2 in respectively. The incoming line position and the outgoing line position of the third winding branch of the V phase refer to Figure 3 V3 and Y3 in respectively. The incoming line position and the outgoing line position of the fourth winding branch of the U phase refer to Figure 3 V4 and Y4 in respectively. The incoming line position and the outgoing line position of the first winding branch of the W phase refer to Figure 3W1 and Z1 therein, the inlet position and the outlet position of the second winding branch of the W phase respectively refer to Figure 3 W2 and Z2 therein, the inlet position and the outlet position of the third winding branch of the W phase respectively refer to Figure 3 W3 and Z3 therein, the inlet position and the outlet position of the fourth winding branch of the W phase respectively refer to Figure 3 W4 and Z4 therein.

[0082] As Figure 3 shown, it is not difficult to see that in this embodiment, among the outlet positions of the 12 winding branches in total of the three phases, they can be X1, Z4, Y1, X2, Z1, Y2, X3, Z2, Y3, X4, Z3 and Y4 adjacent to each other in sequence along the circumferential direction of the iron core member 400. These 12 outlet positions can be divided into the following four groups: Y4, X1 and Z4; Y1, X2 and Z1; Y2, X3 and Z2; Y3, X4 and Z3, and the 4 star point copper bars 100 are respectively connected to these 4 groups of outlet positions.

[0083] In some embodiments, the 12 outlet positions can also be divided into the following four groups: X1, Z4 and Y1; X2, Z1 and Y2; X3, Z2 and Y3; X4, Z3 and Y4. In other embodiments, the 12 outlet positions can also be divided into the following four groups: Z4, Y1 and X2; Z1, Y2 and X3; Z2, Y3 and X4; Z3, Y4 and X1.

[0084] Of course, in some embodiments, n can also be other positive integers not less than 2, such as 2, 3 and 5, etc.; and the number of stator slots 410 arranged along the circumferential direction of the iron core member 400 can also be other numbers, such as 36, 48 and 72, etc.; at the same time, the number of slot layers of any stator slot 410 can also be other numbers, such as 4, 5 or 6, etc. And any winding branch can also adopt other winding methods, such as wave winding, concentric winding or a combination of multiple winding methods.

[0085] The implementation principle of a multi-branch winding structure provided in the first embodiment of the present application is:

[0086] Wind the winding lines of three phases around the iron core member 400 to form the winding body structure 300; then connect the star point copper bar 100 and the phase copper bars 200 to the winding lines of three phases respectively. A total of 3n winding lines of three phases can form 3n outlet positions arranged at intervals in the circumferential direction of the iron core member 400. Among the 3n outlet positions arranged at intervals in the circumferential direction of the iron core member 400, three consecutive outlet positions respectively correspond to one winding branch of three phases, and at least two outlet positions correspond to different winding branches of three phases. The outlet positions of a total of 3n winding branches of three phases can be divided into n groups with every three consecutive ones as a group. The n groups of outlet positions correspond one-to-one to n star point copper bars 100, and the star point copper bar 100 is connected to its corresponding three outlet positions; and the n star point copper bars 100 are also arranged at intervals in the circumferential direction of the iron core member 400.

[0087] In this application, by connecting the star point copper bar 100 to the outlet positions of different winding branches of three phases, when the outlet positions of a total of 3n winding branches of three phases in the multi-branch winding structure are such that every three consecutive outlet positions in the circumferential direction correspond to one winding branch of three phases and at least two winding branches are different winding branches of three phases, the circumferential interference between the star point copper bars 100 can be reduced, so as to reduce the bending parts of the star point copper bars 100, and at the same time avoid arranging two adjacent star point copper bars 100 in a radially misaligned manner, thereby simplifying the structure of the star point copper bars 100, improving the vibration resistance of the star point copper bars 100, and facilitating the stamping process of the star point copper bars 100.

[0088] Embodiment 2

[0089] Embodiment 2 of this application provides a stator assembly, and the stator assembly includes any multi-branch winding structure provided by this application.

[0090] Embodiment 3

[0091] Embodiment 3 of this application provides a motor, and the motor includes any stator assembly provided by this application.

[0092] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered to be within the scope described in this specification.

[0093] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A multi-branch winding structure, characterized in that, The multi-branch winding structure is used for a stator assembly, and the stator assembly further includes an iron core member (400). The multi-branch winding structure is arranged on the iron core member (400). The multi-branch winding structure includes winding circuits of three phases and a star-point copper bar (100). Each winding circuit of any phase includes n parallel winding branches, where n is a positive integer not less than 2; The outgoing positions of the 3n winding branches of the three phases are sequentially arranged at intervals along the circumference of the iron core member (400). Three consecutive outgoing positions along the circumference of the iron core member (400) respectively correspond to one of the winding branches of the three phases, and at least 2 of the outgoing positions correspond to different winding branches of the three phases; The number of the star-point copper bars (100) is n. Any one of the star-point copper bars (100) is connected to three consecutive outgoing positions along the circumference of the iron core member (400), and the n star-point copper bars (100) are arranged at intervals along the circumference.

2. The multi-branch winding structure according to claim 1, wherein The star-point copper bar (100) includes a first copper bar member (110) and copper bar terminals (120). There are 3 copper bar terminals (120) provided to be respectively connected to one of the outgoing positions, and the first copper bar member (110) connects the 3 copper bar terminals (120).

3. The multi-branch winding structure according to claim 2, wherein The winding circuits of the three phases are wound on the iron core member (400) to form a winding body structure (300). The winding body structure (300) extends out of the iron core member (400) at both axial ends of the iron core member (400), and the star-point copper bar (100) is arranged on one side of the end face of the winding body structure (300).

4. The multi-branch winding structure according to claim 3, wherein, The outgoing positions of the 3n winding branches of the three phases are arranged at the innermost or outermost side in the radial direction of the winding body structure (300), and the first copper bar member (110) is arranged at the middle position in the radial direction of the winding body structure (300).

5. The multi-branch winding structure according to claim 4, wherein The multi-branch winding structure further includes phase copper bars (200). There are 3 phase copper bars (200) provided and they correspond to the three phases one by one. The phase copper bars (200) are connected to the incoming positions of the n winding branches of the corresponding phases.

6. The multi-branch winding structure according to claim 5, characterized in that, The phase copper bar (200) includes a second copper bar member (210) and busbars (220). There are n busbars (220) provided. The n winding branches of the phase corresponding to the phase copper bar (200) correspond to the n busbars (220) of the phase copper bar (200) one by one. One end of the busbar (220) is connected to the incoming position of the winding branch, and the second copper bar member (210) connects the other ends of the n busbars (220) of the phase copper bar (200).

7. The multi-branch winding structure according to claim 6, characterized in that, The busbar (220) extends at least in the middle along the circumference of the winding body structure (300), and is arranged on the outer peripheral side of the end of the winding body structure (300).

8. The multi-branch winding structure according to claim 7, characterized in that: The three phases of the multi-branch winding structure are phase U, phase V, and phase W respectively. The iron core member (400) is provided with 60 stator slots (410) along the circumferential direction. Each of the stator slots (410) is sequentially provided with 8 slot layers L1-L8 along the radial direction of the iron core member (400), n = 4. The first winding branch of phase U is: 1L1-13L2-2L1-14L2-3L1-15L2-4L1-16L2-5L1-17L2-5L3-17L4-4L3-16L4-3L3-15L4-2L3-14L4-1L3-13L4-1L5-13L6-2L5-14L6-3L5-15L6-4L5-16L6-5L5-17L6-5L7-17L8-4L7-16L8-3L7-15L8-2L7-14L8-1L7-13L8; The second winding branch of phase U is: 28L8-16L7-29L8-17L7-30L8-18L7-31L8-19L7-32L8-20L7-32L6-20L5-31L6-19L5-30L6-18L5-29L6-17L5-28L6-16L5-28L4-16L3-29L4-17L3-30L4-18L3-31L4-19L3-32L4-20L3-32L2-20L1-31L2-19L1-30L2-18L1-29L2-17L1-28L2-16L1; The third winding branch of phase U is: 31L1-43L2-32L1-44L2-33L1-45L2-34L1-46L2-35L1-47L2-35L3-47L4-34L3-46L4-33L3-45L4-32L3-44L4-31L3-43L4-3L5-43L6-32L5-44L6-33L5-45L6-34L5-46L6-35L5-47L6-35L7-47L8-34L7-46L8-33L7-45L8-32L7-44L8-31L7-43L8; The fourth winding branch of phase U is: 58L8-46L7-59L8-47L7-60L8-48L7-61L8-49L7-62L8-50L7-62L6-50L5-61L6-49L5-60L6-48L5-59L6-47L5-58L6-46L5-58L4-46L3-59L4-47L3-60L4-48L3-61L4-49L3-62L4-50L3-62L2-50L1-61L2-49L1-60L2-48L1-59L2-47L1-58L2-46L1; The winding circuit of phase V and the winding circuit of phase U are obtained by sequentially translating the winding circuit of phase U by 10 and 20 of the stator slots (410) respectively.

9. A stator assembly, characterized in that, The stator assembly includes a multi-branch winding structure as described in any one of claims 1-8.

10. A motor, characterized in that, The motor includes a stator assembly as described in claim 9.

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