Continuous wave winding structure, stator assembly and motor

Abstract

The utility model relates to a continuous wave winding structure, a stator assembly and a motor, the continuous wave winding structure is used for the stator assembly, the number of pole pairs of the stator assembly is p, the stator assembly further comprises an iron core part, 48 conductor grooves are formed in the iron core part at equal intervals in the circumferential direction, each conductor groove is provided with n groove layers in the radial direction, the continuous wave winding structure comprises three phases of winding circuits, the winding circuit of each phase comprises m winding branches connected in parallel, each winding branch comprises two continuous winding wires, the two continuous winding wires are welded to be connected in series, one continuous winding wire is subjected to wave winding in a first winding direction, the other continuous winding wire is subjected to wave winding in a second winding direction, and m is an integer greater than or equal to 2; the first winding direction is opposite to the second winding direction. According to the winding structure, the problem that too many welding spots are caused when the winding structure is formed by welding and winding a plurality of hairpin coils can be avoided, so that the structural stability of the winding structure is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a continuous wave winding structure, a stator assembly and an electric machine. BACKGROUND

[0002] The power assembly of a new energy vehicle usually includes an electric machine, which can specifically adopt a flat wire electric machine. The stator assembly of the flat wire electric machine usually includes an iron core piece and a winding structure wound on the iron core piece, and the winding structure is usually wound by flat hairpin coils. The hairpin coil is usually provided with a plurality of hairpin coils, and the plurality of hairpin coils are connected by welding. After welding, a plurality of welding points are formed. For the 48-slot parallel multi-branch three-phase winding structure commonly used in the prior art, the welding points usually reach more than two hundred, and the reliability of the welding points is required to be higher. When the welding points have defects, the stator assembly is difficult to realize its application function. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a continuous wave winding structure, a stator assembly and an electric machine to improve the problem of too many welding points in the 48-slot parallel multi-branch three-phase winding structure in the prior art.

[0004] In a first aspect, the present application provides a continuous wave winding structure, which is used in a stator assembly, the pole pair number of the stator assembly is p, the stator assembly further includes an iron core piece, the iron core piece is provided with 48 conductor slots at equal intervals in the circumferential direction, the conductor slots are provided with n slot layers in the radial direction, the continuous wave winding structure includes three-phase winding lines, each phase winding line includes m parallel winding branches, each winding branch includes a continuous winding line, the continuous winding line is provided with two continuous winding lines, the two continuous winding lines are welded to be connected in series, one of the continuous winding lines is wave-wound in a first winding direction, the other continuous winding line is wave-wound in a second winding direction, and the first winding direction and the second winding direction are opposite.

[0005] In one embodiment, the continuous winding line includes a continuous effective edge and a continuous hairpin edge, the continuous effective edge and the continuous hairpin edge are provided with a plurality of edges, and the plurality of continuous effective edges and the plurality of continuous hairpin edges are integrally formed, the continuous effective edge is arranged in the conductor slot, and the continuous hairpin edge connects two adjacent continuous effective edges.

[0006] In one of the embodiments, one end of the continuous winding wire is arranged as a continuous welding terminal, the continuous welding terminals of the two continuous winding wires are connected to be directly connected in series; and / or, the two continuous winding wires are connected in series through a reverse wire, wherein the reverse wire comprises a reverse connecting wire and two reverse welding terminals, the two reverse welding terminals are arranged to correspondingly connect with the continuous welding terminals of the two continuous winding wires respectively, and the reverse connecting wire connects the two reverse welding terminals.

[0007] In one of the embodiments, p=4, the three phases of the stator assembly are U phase, V phase and W phase respectively, and the winding lines of the V phase and the W phase are sequentially translated by 4 and 8 conductor slots respectively from the winding lines of the U phase.

[0008] In one of the embodiments, each winding branch enters the wire from the innermost side of the conductor slot and exits the wire from the innermost side of the conductor slot; or, each winding branch enters the wire from the outermost side of the conductor slot and exits the wire from the outermost side of the conductor slot.

[0009] In one of the embodiments, n=8, m=4, the first winding branch of the U phase is:

[0010] 3#L1-10#L2-15#L2-22#L2-27#L3-34#L4-39#L4-46#L4-4#L5-11#L6-16#L6-23#L6-28#L7-35#L8-40#L8-47#L8-4#L8-47#L7-40#L7-35#L7-28#L6-23#L5-16#L5-11#L5-3#L4-46#L3-39#L3-34#L3-27#L2-22#L1-15#L1-10#L1;

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

[0012] 4#L1-9#L2-16#L2-21#L2-28#L3-33#L4-40#L4-45#L4-5#L5-10#L6-17#L6-22#L6-29#L7-34#L8-41#L8-46#L8-5#L8-46#

[0013] L7-41#L7-34#L7-29#L6-22#L5-17#L5-10#L5-4#L4-45#L3-40#L3-33#L3-28#L2-21#L1-16#L1-9#L1;

[0014] The third winding branch of the U phase is:

[0015] 27 #L1-34 #L2-39 #L2-46 #L2-3 #L3-10 #L4-15 #L4-22 #L4-28 #L5-35 #L6-40 #L6-47 #L6-4 #L7-11 #L8-16 #L8-23 #L8-28 #L8-23 #L7-16 #L7-11 #L7-4 #L6-47 #L5-40 #L5-35 #L5-27 #L4-22 #L3-15 #L3-10 #L3-3 #L2-46 #L1-39 #L1-34 #L1;

[0016] The fourth winding branch of the U phase is:

[0017] 28 #L1-33 #L2-40 #L2-45 #L2-4 #L3-9 #L4-16 #L4-21 #L4-29 #L5-34 #L6-41 #L6-46 #L6-5 #L7-10 #L8-17 #L8-22 #L8-29 #L8-22 #L7-17 #L7-10 #L7-5 #L6-46 #L5-41 #L5-34 #L5-28 #L4-21 #L3-16 #L3-9 #L3-4 #L2-45 #L1-40 #L1-33 #L1.

[0018] In one of the embodiments, the continuous wave winding structure further comprises phase copper bars, each of which corresponds to one of the three phases of the stator assembly, and each of the phase copper bars is connected to the entry position of the m winding branches of the corresponding phase.

[0019] In one of the embodiments, the continuous wave winding structure further comprises a star point copper bar, which corresponds to the m winding branches, and the star point copper bar is connected to the exit position of the corresponding winding branches of the three phases.

[0020] In a second aspect, the application provides a stator assembly, which comprises any one of the continuous wave winding structures provided by the application.

[0021] In a third aspect, the application provides an electric machine, which comprises any one of the stator assemblies provided by the application.

[0022] By reasonably setting the winding mode and direction of the two continuous winding wires in any winding branch of the 48-slot parallel multi-branch three-phase winding structure, the application can avoid the problem of excessive welding points caused by welding of a plurality of hairpin coils, thereby improving the structural stability of the winding structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure schematic diagram of the stator assembly suitable for the continuous wave winding structure provided by the first embodiment of the application.

[0024] Figure 2 Structure diagram of a conductor slot of a stator assembly to which the continuous wave winding structure provided in Embodiment One of the present application is applicable;

[0025] Figure 3 Structure diagram of a first winding branch of a U-phase of the continuous wave winding structure provided in Embodiment One of the present application;

[0026] Figure 4 Structure diagram of an existing wave winding;

[0027] Figure 5 Winding diagram of a first winding branch of a U-phase of the continuous wave winding structure provided in Embodiment One of the present application;

[0028] Figure 6 Structure diagram of a second winding branch of a U-phase of the continuous wave winding structure provided in Embodiment One of the present application;

[0029] Figure 7 Winding diagram of a U-phase of the continuous wave winding structure provided in Embodiment One of the present application;

[0030] Figure 8 Winding diagram of the continuous wave winding structure provided in Embodiment One of the present application.

[0031] Reference signs: 100, continuous winding wire; 110, continuous effective edge; 120, continuous card edge; 130, continuous welding terminal; 200, reverse wire; 210, reverse connecting wire; 220, reverse welding terminal; 300, phase copper bar; 400, star point copper bar; 500, core piece; 510, conductor slot; 600, wave winding; 610, wave winding effective edge; 620, wave winding welding end; 630, wave winding card end. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0033] It should be noted that the diagrams provided in the present embodiments only schematically illustrate the basic concept of the present application.

[0034] The structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the utility model. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the functions and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0035] The orientation or positional relationship referred to in the specification, such as "up", "down", "left", "right", "middle", "vertical", "horizontal", "horizontal", "inner", "outer", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] Embodiment one

[0037] Embodiment one of the present application provides a continuous wave winding structure, as shown in Figures 1 to 8 The continuous wave winding structure is used for a stator assembly, the pole pair number of the stator assembly is p, and the stator assembly further includes a core member 500, the core member 500 is provided with 48 conductor slots 510 at equal intervals in the circumferential direction, and the conductor slots 510 are provided with n slot layers in the radial direction. The continuous wave winding structure includes three-phase winding circuits, each phase winding circuit includes m parallel winding branches, each winding branch includes two continuous winding wires 100, the two continuous winding wires 100 are welded to be connected in series, one of the two continuous winding wires 100 is wave-wound in a first winding direction, and the other continuous winding wire 100 is wave-wound in a second winding direction, and the first winding direction and the second winding direction are opposite.

[0038] As shown in Figure 1 and Figure 2As shown, in the embodiment, it is exemplarily illustrated that the number of pole pairs of the stator assembly is p, i.e. it includes p pairs of poles, and the number of poles of the stator assembly is 2p. The stator assembly can include a core member 500 and a winding structure, and the winding structure is wound on the core member 500, wherein the core member 500 can be provided as a hollow cylindrical structure, and the conductor slots 510 can be provided on the inner side of the core member 500, and 48 conductor slots 510 can be provided at equal intervals along the circumferential direction of the core member 500. For any conductor slot 510, n slot layers are provided, and the L1 slot layer, the L2 slot layer, …, and the Ln slot layer of the conductor slot 510 are sequentially provided along the radial direction of the core member 500 from inside to outside. Wherein, “n” can be preferably a positive integer not less than 4, “Ln” represents the nth slot layer of the conductor slot 510; “Ln” is only for facilitating the description of the slot layers of the conductor slot 510, and is not used to limit it in any way. In some embodiments, the slot layer number of the conductor slot 510 can also be represented by other marks.

[0039] As shown in Figure 1 and Figure 3 The winding structure is partially wound in the conductor slot 510 of the stator core, and can be provided as a structure similar to a rotary body, and the two ends thereof can extend out of the end of the stator core. The winding structure can include three-phase winding circuits, and in the embodiment, each phase winding circuit includes m parallel winding branches, and m can be preferably a positive integer not less than 2. For any winding branch, it includes two continuous winding wires 100, and the continuous winding wire 100 can be integrally formed by using a conductor material, for example, a flat enameled wire. The two continuous winding wires 100 are connected in series by welding one end thereof. When winding, one continuous winding wire 100 is wave-wound in a first winding direction, and the other continuous winding wire 100 is wave-wound in a second winding direction. The first winding direction and the second winding direction are both circumferential directions of the core member 500, and the directions are opposite; for example, the first winding direction is the clockwise direction of the core member 500, and the second winding direction is the counterclockwise direction of the core member 500.

[0040] As shown in Figure 4As shown, it should be noted that the winding structure in the prior art adopts several wave winding coils 600 for winding when wave winding is performed. The wave winding coil 600 is specifically provided as one of U-shaped hairpin coils, which can specifically include a wave winding effective edge 610, a wave winding welding end 620 and a wave winding hairpin end 630, wherein the wave winding effective edge 610 is provided as two and is respectively arranged in the two conductor grooves 510. The wave winding welding end 620 corresponds to the wave winding effective edge 610 one by one, and the two wave winding welding ends 620 are arranged at the same end of the two wave winding effective edges 610 and extend in directions away from each other. The wave winding hairpin end 630 connects the other end of the two wave winding effective edges 610, and the wave winding hairpin end 630 can be usually provided as a structure similar to a "V" letter. When the two wave winding coils 600 are connected, one wave winding welding end 620 is close to each other, and the two wave winding coils 600 are connected through the two wave winding welding ends 620 close to each other, and the two wave winding welding ends 620 close to each other are welded and fixed to form a welding point, and the two wave winding welding ends 620 close to each other also have a structure similar to a "V" letter.

[0041] As shown, Figure 3 In the present application, for any continuous winding wire 100, after winding once on the core member 500 in the shape of the wave winding coil 600, the next winding is performed in the shape of the wave winding coil 600, that is, two continuous wave winding coils 600 are formed. It can be seen that any continuous winding wire 100 in the present application corresponds to several continuous wave winding coils 600, and two continuous winding wires 100 correspond to two continuous wave windings in opposite directions.

[0042] It can be understood that by reasonably setting the winding method and direction of the two continuous winding wires 100 in any winding branch of the 48-slot parallel multi-branch three-phase winding structure, the problem of too many welding points caused by welding of several hairpin coils to form the winding structure can be avoided, thereby improving the structural stability of the winding structure.

[0043] Specifically, the continuous winding wire 100 includes continuous effective edges 110 and continuous hairpin edges 120, and the continuous effective edges 110 and the continuous hairpin edges 120 are provided as several, and the several continuous effective edges 110 and the several continuous hairpin edges 120 are integrally formed, the continuous effective edges 110 are arranged in the conductor grooves 510, and the continuous hairpin edges 120 connect the two adjacent continuous effective edges 110.

[0044] As shown, Figure 3 and Figure 5As shown, in the embodiment, the continuous effective edge 110 and the continuous card edge 120 are integrally formed, which can be formed by winding the enameled wire into a specific shape. The continuous effective edge 110 is arranged in the conductor groove 510, and is arranged in several strips; the continuous card edge 120 is also arranged in several strips, which is used to connect two adjacent continuous effective edges 110, and the continuous card edge 120 can also be arranged in a shape similar to a "V" shape. It is not difficult to see that the continuous card edge 120 can be regarded as a combination of one wave winding card end 630 or two wave winding welding ends 620 in the existing wave winding coil 600; and the two adjacent continuous effective edges 110 can be regarded as two wave winding effective edges 610 in the existing wave winding coil 600. It should be noted that when one continuous winding wire 100 includes an even number of continuous effective edges 110, it can be regarded as a combination of several wave winding coils 600. When one continuous winding wire 100 includes an odd number of continuous effective edges 110, it can be regarded as a combination of several wave winding coils 600 plus one-half wave winding coil 600.

[0045] It can be understood that, by reasonably arranging the structure of the continuous winding wire 100, the continuous winding wire 100 can be continuously wound on the core member 500 in a wave winding manner, so as to obtain the required winding structure.

[0046] More specifically, one end of the continuous winding wire 100 is arranged as a continuous welding terminal 130, and the continuous welding terminals 130 of the two continuous winding wires 100 are connected to be directly connected in series; and / or, the two continuous winding wires 100 are connected in series through a reverse wire 200, wherein the reverse wire 200 includes a reverse connecting wire 210 and a reverse welding terminal 220, the reverse welding terminal 220 is arranged in two, and is connected with the continuous welding terminal 130 of the two continuous winding wires 100 one by one, and the reverse connecting wire 210 connects the two reverse welding terminals 220.

[0047] As shown in FIG. 6, in the embodiment, the two continuous winding wires 100 are connected in series through the continuous welding terminals 130 at one end. Figure 3 and Figure 5 As shown, in the embodiment, the two continuous winding wires 100 are welded at one end, and the two ends used for welding are the continuous welding terminals 130. The two reverse welding terminals 220 can be directly welded and fixed, so that the two continuous winding wires 100 are directly connected in series.

[0048] As shown in FIG. 6, in the embodiment, the two continuous winding wires 100 are connected in series through the continuous welding terminals 130 at one end. Figure 6As shown, of course, two reverse welding terminals 220 can also be welded and fixed with the reverse wire 200, so that two continuous winding wires 100 are connected in series with interval. The reverse wire 200 can also be integrally formed, for example, it is also prepared by using a flat enameled wire, which can include reverse welding terminals 220 connected with the continuous welding terminals 130 one by one and a reverse connecting wire 210 connecting the two reverse welding terminals 220.

[0049] In the embodiment, the two connection modes of the two continuous winding wires 100 can be reasonably selected according to actual needs, for example, when the connection positions of the two continuous winding wires 100 are close to each other, the two continuous winding wires 100 can be directly connected in series; when the connection positions of the two continuous winding wires 100 are far away from each other, the two continuous winding wires 100 can be indirectly connected in series through the reverse wire 200, and the length of the reverse wire 200 can be reasonably set according to actual needs. It should be noted that the connection positions of the two continuous winding wires 100 are the two continuous effective edges 110 adjacent in the winding sequence, and the distance between the connection positions of the two continuous winding wires 100 is the number of the conductor slots 510 between the two continuous effective edges 110.

[0050] It can be understood that, by reasonably setting the connection mode of the two continuous winding wires 100, i.e., directly connecting in series or indirectly connecting in series through the reverse wire 200, the two continuous winding wires 100 can be wound in the first winding direction and the second winding direction respectively to form a winding branch of the winding structure, thereby facilitating the winding of the required winding structure.

[0051] More specifically, p = 4, the three phases of the stator assembly are U phase, V phase and W phase, and the winding lines of the V phase and the W phase are obtained by sequentially translating the winding lines of the U phase by 4 and 8 conductor slots 510.

[0052] As shown in FIGS. 1, 2 and 3, Figure 7 and Figure 8 As shown in the embodiment, the number of pole pairs of the stator assembly can be 4 pole pairs, i.e., the number of poles is 8 poles; and the three phases of the stator assembly can be U phase, V phase and W phase, in which the serial numbers "U", "V" and "W" are only used for describing the three phases of the stator assembly, and do not limit the three phases. In some embodiments, the three phases of the stator assembly can also be represented by other serial numbers. According to the foregoing parameters, the winding structure in the embodiment is a 48-slot 8-pole three-phase winding structure. In order to ensure three-phase balance, the winding lines of the U phase can be sequentially translated by 48 / (3*4) = 4 and 2*48 / (3*4) = 8 conductor slots 510 along the first winding direction or the second winding direction, to obtain the winding lines of the V phase and the W phase, respectively.

[0053] It can be understood that the embodiment is suitable for the stator assembly with the reasonable pole pair number of the winding structure, and the translation relationship between the three winding lines is reasonably set, so as to facilitate the three-phase balance of the winding structure obtained by winding.

[0054] More specifically, each winding branch enters the conductor slot 510 at the innermost side of the conductor slot 510 and exits the conductor slot 510 at the innermost side of the conductor slot 510; or each winding branch enters the conductor slot 510 at the outermost side of the conductor slot 510 and exits the conductor slot 510 at the outermost side of the conductor slot 510.

[0055] As shown in Figure 3 In the embodiment, it is exemplarily illustrated that the innermost side of the conductor slot 510 is entered, that is, wound in the L1 slot layer of the conductor slot 510, and the outermost side of the conductor slot 510 is entered, that is, wound in the Ln slot layer of the conductor slot 510. For any winding branch, the first continuous winding line 100 is wound in the L1 slot layer, and the other continuous winding line 100 is wound in the L1 slot layer. Alternatively, the first continuous winding line 100 of any winding branch is wound in the Ln slot layer, and the other continuous winding line 100 is wound in the Ln slot layer.

[0056] It can be understood that the embodiment can make each winding branch enter or exit at the innermost side or the outermost side of the conductor slot 510 by reasonably setting the entering position and the exiting position of each winding branch; according to the arrangement of the phase copper bar 300 or the star point copper bar 400 according to the foregoing entering position and exiting position, the structure of the phase copper bar 300 or the star point copper bar 400 can be simplified, and the structure of the busbar assembly is further prepared, so that the structure of the busbar assembly is more simple, and the connection of the three winding lines is more stable.

[0057] More specifically, n = 8, m = 4, the first winding branch of the U phase is:

[0058] 3#L1-10#L2-15#L2-22#L2-27#L3-34#L4-39#L4-46#L4-4#L5-11#L6-16#L6-23#L6-28#L7-35#L8-40#L8-47#L8-4#L8-47#L7-40#L7-35#L7-28#L6-23#L5-16#L5-11#L5-3#L4-46#L3-39#L3-34#L3-27#L2-22#L1-15#L1-10#L1;

[0059] The second winding branch of the U phase is:

[0060] 4 #L1-9 #L2-16 #L2-21 #L2-28 #L3-33 #L4-40 #L4-45 #L4-5 #L5-10 #L6-17 #L6-22 #L6-29 #L7-34 #L8-41 #L8-46 #L8-5 #L8-46

[0061] L7-41 #L7-34 #L7-29 #L6-22 #L5-17 #L5-10 #L5-4 #L4-45 #L3-40 #L3-33 #L3-28 #L2-21 #L1-16 #L1-9 #L1;

[0062] The third winding branch of the U phase is:

[0063] 27 #L1-34 #L2-39 #L2-46 #L2-3 #L3-10 #L4-15 #L4-22 #L4-28 #L5-35 #L6-40 #L6-47 #L6-4 #L7-11 #L8-16 #L8-23 #L8-28 #L8-23 #L7-16 #L7-11 #L7-4 #L6-47 #L5-40 #L5-35 #L5-27 #L4-22 #L3-15 #L3-10 #L3-3 #L2-46 #L1-39 #L1-34 #L1;

[0064] The fourth winding branch of the U phase is:

[0065] 28 #L1-33 #L2-40 #L2-45 #L2-4 #L3-9 #L4-16 #L4-21 #L4-29 #L5-34 #L6-41 #L6-46 #L6-5 #L7-10 #L8-17 #L8-22 #L8-29 #L8-22 #L7-17 #L7-10 #L7-5 #L6-46 #L5-41 #L5-34 #L5-28 #L4-21 #L3-16 #L3-9 #L3-4 #L2-45 #L1-40 #L1-33 #L1.

[0066] As Figure 2 shown in the drawings, in the present embodiment, it is exemplarily illustrated that the conductor slot 510 can be provided with 8 slot layers, and the winding line of any phase of the winding structure can include 4 parallel winding branches. According to the foregoing parameters, the winding structure can be a 48-slot 8-pole 8-layer parallel 4-branch three-phase winding structure.

[0067] As Figure 1As shown, in the present embodiment, the 48 conductor slots 510 can be sequentially numbered by the serial numbers "1#"- "48#", respectively; similarly, the serial numbers "1#"- "48#" are merely for the convenience of describing the 48 conductor slots 510, and do not serve to limit them in any way, any conductor slot 510 in the circumferential direction of the core member 500 can be used as the conductor slot 510 with serial number "1". In some embodiments, the conductor slots 510 can also be numbered by other serial numbers. In the present embodiment, the first winding direction can be the direction in which the serial numbers of the conductor slots 510 increase, and the second winding direction can be the direction in which the serial numbers of the conductor slots 510 decrease. It should be noted that when a continuous winding wire 100 winds around the conductor slot 510 with serial number "48#" in the first winding direction, it completes a turn on the core member 500, and is then renumbered from "1#" to "48#", for example, when a continuous winding wire 100 winds to the conductor slot 510 with serial number "50#", it actually winds in the conductor slot 510 with serial number "2#".

[0068] As shown, the first winding branch of the U-phase is taken as an example for illustration. Figure 5 As shown, the first winding branch of the U-phase is taken as an example for illustration.

[0069] The line corresponding to "3#L1-10#L2-15#L2-22#L2-27#L3-34#L4-39#L4-46#L4-4#L5-11#L6-16#L6-23#L6-28#L7-35#L8-40#L8-47#L8" represents the first continuous winding wire 100 of the first winding branch of the U-phase; wherein "3#L1" corresponds to the line representing the in-line position of the first winding branch of the U-phase, the first continuous effective edge 110 of which is wound in the L1 slot layer of the conductor slot 510 with serial number "3#", refer to U1 in Figure 5 ; and the line corresponding to "10#L2" represents that the first continuous winding wire 100 is wound in the L2 slot layer of the conductor slot 510 with serial number "10#" after the in-line position, across 7 conductor slots 510.

[0070] The line corresponding to "4#L8-47#L7-40#L7-35#L7-28#L6-23#L5-16#L5-11#L5-3#L4-46#L3-39#L3-34#L3-27#L2-22#L1-15#L1-10#L1" represents the second continuous winding wire 100 of the U-phase. Wherein "10#L1" corresponds to the line representing the out-line position of the first winding branch of the U-phase, the last continuous effective edge 110 of which is wound in the L1 slot layer of the conductor slot 510 with serial number "10#", refer to X1 in Figure 5 .

[0071] The two continuous effective edges 110 adjacent to the connection of the first continuous winding line 100 and the second continuous winding line 100 of the first winding branch of the U phase are respectively wound in the L8 slot layer of the conductor slot 510 with the serial number of “47#” and the L8 slot layer of the conductor slot 510 with the serial number of “4#”, at this time, the two continuous welding terminals 130 of the first continuous winding line 100 and the second continuous winding line 100 need to cross 5 conductor slots 510 when welding and fixing, and the number is relatively small; based on this, the two continuous welding terminals 130 can be directly connected.

[0072] As shown in Figure 7 , the second, third and fourth winding branches of the U phase are the same. The second winding branch of the U phase is in by the L1 slot layer of the conductor slot 510 with the serial number of “4#”, refer to U2 in Figure 7 ; at the same time, it is out by the L1 slot layer of the conductor slot 510 with the serial number of “9#”, refer to X2 in Figure 7 ; and the two continuous effective edges 110 adjacent to the connection of the first continuous winding line 100 and the second continuous winding line 100 of the second winding branch of the U phase are respectively wound in the L8 slot layer of the conductor slot 510 with the serial number of “46#” and the L8 slot layer of the conductor slot 510 with the serial number of “5#”, at this time, the two continuous welding terminals 130 of the first continuous winding line 100 and the second continuous winding line 100 need to cross 7 conductor slots 510 when welding and fixing, and the number is relatively large; based on this, the two continuous welding terminals 130 can be connected through the reverse line 200.

[0073] The third winding branch of the U phase is in by the L1 slot layer of the conductor slot 510 with the serial number of “27#”, refer to U3 in Figure 7 ; at the same time, it is out by the L1 slot layer of the conductor slot 510 with the serial number of “34#”, refer to X3 in Figure 7 ; and the two continuous effective edges 110 adjacent to the connection of the first continuous winding line 100 and the second continuous winding line 100 of the third winding branch of the U phase are respectively wound in the L8 slot layer of the conductor slot 510 with the serial number of “23#” and the L8 slot layer of the conductor slot 510 with the serial number of “28#”, at this time, the two continuous welding terminals 130 of the first continuous winding line 100 and the second continuous winding line 100 need to cross 5 conductor slots 510 when welding and fixing, and the number is relatively large; based on this, the two continuous welding terminals 130 can be directly connected.

[0074] The fourth winding branch of the U phase is in by the L1 slot layer of the conductor slot 510 with the serial number of “28#”, refer to U4 in Figure 7 ; at the same time, it is out by the L1 slot layer of the conductor slot 510 with the serial number of “33#”, refer to X4 in Figure 7The first continuous winding line 100 and the second continuous winding line 100 at the connection position of the fourth winding branch of the U phase are respectively wound in the L8 slot layer of the conductor slot 510 with the serial number of "22#", and the L8 slot layer of the conductor slot 510 with the serial number of "29#", at this time, the two continuous welding terminals 130 of the first continuous winding line 100 and the second continuous winding line 100 need to cross 7 conductor slots 510 when welded and fixed, and the number is relatively large; based on this, the two continuous welding terminals 130 can be connected through the reverse line 200.

[0075] As shown in Figure 8 , and since the winding line of the V phase and the winding line of the W phase can be obtained by sequentially translating the winding line of the U phase by 4 and 8 conductor slots 510, respectively, the incoming line positions of the first, second, third and fourth winding branches of the V phase are the lines corresponding to "7#", "8#", "31#" and "32#", respectively, with reference to V1, V2, V3 and V4 in Figure 8 ; the outgoing line positions of the first, second, third and fourth winding branches of the V phase are the lines corresponding to "14#", "13#", "38#" and "37#", respectively, with reference to Y1, Y2, Y3 and Y4 in FIG. 8. Figure 8 The incoming line positions of the first, second, third and fourth winding branches of the W phase are the lines corresponding to "11#", "12#", "35#" and "36#", respectively, with reference to W1, W2, W3 and W4 in Figure 8 ; the outgoing line positions of the first, second, third and fourth winding branches of the W phase are the lines corresponding to "18#", "17#", "42#" and "41#", respectively, with reference to Z1, Z2, Z3 and Z4 in

[0076] Specifically, the continuous wave winding structure further comprises a phase copper bar 300, the phase copper bar 300 corresponds to one of the three phases of the stator assembly, and the phase copper bar 300 is connected to the incoming line positions of the m winding branches of the corresponding phase.

[0077] As shown in Figure 8 , in this embodiment, it is exemplarily illustrated that the phase copper bar 300 can be provided as three, and corresponds to one of the three phases of the stator assembly. The phase copper bar 300 can be distinguished by the corresponding phase, for example, the phase copper bar 300 corresponding to the U phase can be referred to as the U phase copper bar 300. The phase copper bar 300 is connected to the incoming line positions of the m winding branches of the corresponding phase, for example, the U phase copper bar 300 is connected to the aforementioned U1, U2, U3 and U4.

[0078] It can be understood that, by providing the phase copper bar 300, the embodiment facilitates the connection of the incoming line positions of the m winding branches of the same phase, so as to obtain the required winding structure.

[0079] Specifically, the continuous wave winding structure further comprises m star point copper bars 400, each of which corresponds to one of the m winding branches, and each of the star point copper bars 400 is connected to the outgoing line position of the corresponding winding branch of the three phases.

[0080] As shown in Figure 8 Figure 8 In this embodiment, it is exemplarily illustrated that the star point copper bars 400 can be provided as m, and correspond to the m winding branches. Each of the star point copper bars 400 is connected to the outgoing line position of the corresponding winding branch, for example, the star point copper bar 400 corresponding to the first winding branch is connected to X1, Y1 and Z1.

[0081] It can be understood that, by providing the star point copper bars 400, the outgoing line positions of the corresponding winding branches of the three phases are connected, so as to obtain the winding structure.

[0082] The implementation principle of the continuous wave winding structure provided by the embodiment one of the present application is as follows:

[0083] The core member 500 is prepared into a shape, and then the winding structure is wound on the core member 500. When winding, one continuous winding wire 100 is waved along a first winding direction, and the other continuous winding wire 100 is waved along a second winding direction, and the two continuous winding wires 100 are connected in series.

[0084] By reasonably setting the winding mode and winding direction of the two continuous winding wires 100 in any winding branch of the 48-slot parallel multi-branch three-phase winding structure, the present application can avoid the problem of too many welding points caused by welding the winding structure by a plurality of hairpin coils, thereby improving the structural stability of the winding structure.

[0085] Embodiment two

[0086] The embodiment two of the present application provides a stator assembly, which comprises any one of the continuous wave winding structures provided by the present application.

[0087] Embodiment three

[0088] The embodiment three of the present application provides an electric machine, which comprises any one of the stator assemblies provided by the present application.

[0089] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0090] The above embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A continuous wave winding structure, characterized in that, The continuous wave winding structure is used for a stator assembly, the stator assembly has p pole pairs, the stator assembly also includes a core (500), the core (500) is provided with 48 conductor slots (510) at equal intervals along the circumference, the conductor slots (510) are provided with n slot layers along the radial direction, the continuous wave winding structure includes three phase winding lines, each phase winding line includes m parallel winding branches, each winding branch includes a continuous winding line (100), two continuous winding lines (100) are provided, the two continuous winding lines (100) are welded to be connected in series, one of the continuous winding lines (100) is wave-wound in a first winding direction, the other continuous winding line (100) is wave-wound in a second winding direction, the first winding direction and the second winding direction are opposite.

2. The continuous wave winding structure according to claim 1, characterized in that, The continuous winding wire (100) includes a continuous effective edge (110) and a continuous hairpin edge (120). Both the continuous effective edge (110) and the continuous hairpin edge (120) are provided with a plurality of them, and the plurality of continuous effective edges (110) and the plurality of continuous hairpin edges (120) are integrally formed. The continuous effective edge (110) is disposed in the conductor groove (510), and the continuous hairpin edge (120) connects two adjacent continuous effective edges (110).

3. The continuous wave winding structure according to claim 2, characterized in that, One end of the continuous winding wire (100) is configured as a continuous welding terminal (130), and the continuous welding terminals (130) of the two continuous winding wires (100) are connected to be directly connected in series; and / or, the two continuous winding wires (100) are connected in series through a reverse wire (200), wherein the reverse wire (200) includes a reverse connecting wire (210) and a reverse welding terminal (220), and two reverse welding terminals (220) are provided, and are respectively connected to the continuous welding terminals (130) of the two continuous winding wires (100) one by one, and the reverse connecting wire (210) connects the two reverse welding terminals (220).

4. The continuous wave winding structure according to claim 3, characterized in that, p=4, the three phases of the stator assembly are U phase, V phase and W phase respectively, the winding line of the V phase and the winding line of the W phase are obtained by sequentially shifting the winding line of the U phase by 4 and 8 of the conductor slots (510).

5. The continuous wave winding structure according to claim 4, characterized in that, Each winding branch enters from the innermost side of the conductor groove (510) and exits from the innermost side of the conductor groove (510); or, each winding branch enters from the outermost side of the conductor groove (510) and exits from the outermost side of the conductor groove (510).

6. The continuous wave winding structure according to claim 5, characterized in that, When n=8 and m=4, the first winding branch of phase U is: 3#L1-10#L2-15#L2-22#L2-27#L3-34#L4-39#L4-46#L4-4#L5-11#L6-16#L6-23#L6-28#L7-35#L8-40#L8-47#L8- 4#L8-47#L7-40#L7-35#L7-28#L6-23#L5-16#L5-11#L5-3#L4-46#L3-39#L3-34#L3-27#L2-22#L1-15#L1-10#L1; The second winding branch of the U phase is: 4#L1-9#L2-16#L2-21#L2-28#L3-33#L4-40#L4-45#L4-5#L5-10#L6-17# L6-22#L6-29#L7-34#L8-41#L8-46#L8-5#L8-46# L7-41#L7-34#L7-29#L6-22#L5-17#L5-10#L5-4#L4-45#L3-40#L3-33#L3-28#L2-21#L1-16#L1-9#L1; The third winding branch of the U phase is: 27#L1-34#L2-39#L2-46#L2-3#L3-10#L4-15#L4-22#L4-28#L5-35#L6-40#L6-47#L6-4#L7-11#L8-16#L8-23#L8- 28#L8-23#L7-16#L7-11#L7-4#L6-47#L5-40#L5-35#L5-27#L4-22#L3-15#L3-10#L3-3#L2-46#L1-39#L1-34#L1; The fourth winding branch of the U phase is: 28#L1-33#L2-40#L2-45#L2-4#L3-9#L4-16#L4-21#L4-29#L5-34#L6-41#L6-46#L6-5#L7-10#L8-17#L8-22#L8- 29#L8-22#L7-17#L7-10#L7-5#L6-46#L5-41#L5-34#L5-28#L4-21#L3-16#L3-9#L3-4#L2-45#L1-40#L1-33#L1.

7. The continuous wave winding structure according to claim 1, characterized in that, The continuous wave winding structure also includes a phase copper busbar (300), which corresponds one-to-one with the three phases of the stator assembly. The phase copper busbar (300) is connected to the input position of the m winding branches of its corresponding phase.

8. The continuous wave winding structure according to claim 1, characterized in that, The continuous wave winding structure also includes a star copper busbar (400), which corresponds one-to-one with m winding branches. The star copper busbar (400) is connected to the output position of the corresponding winding branch of the three phases.

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

10. An electric motor, characterized in that, The motor includes the stator assembly as described in claim 9.

Images