Odd-layer winding structure, stator assembly and motor

Abstract

The utility model relates to an odd-layer winding structure, a stator assembly and a motor, the number of poles of the stator assembly is 2p, the number of phases of the stator assembly is three, a stator core is provided with 72 stator slots, each stator slot has seven slot layers, the winding structure comprises winding circuits of three phases, the winding circuit of each phase comprises two winding branches which are connected in parallel, and the winding branches are connected in parallel. Each winding branch enters from the a groove layer, is sequentially wound in the b groove layer, the c groove layer, the d groove layer, the e groove layer, the f groove layer and the g groove layer, then is continuously wound in the g groove layer, is sequentially wound in the f groove layer, the e groove layer, the d groove layer, the c groove layer, the b groove layer and the a groove layer, and then is circulated until outgoing from the a groove layer is carried out; and the two winding branches of any phase enter from the two continuous stator slots and exit from the two continuous stator slots. When a busbar assembly is prepared, the winding structure provided by the utility model can reduce the structural span of the busbar assembly, and reduces the risk that the busbar assembly loses efficacy due to vibration at the same time.

Description

Technical Field

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

[0002] The motor can be used as an important component of the power system of new energy vehicles, and can specifically be a drive motor or a generator. The motor generally includes a motor housing, a stator assembly and a rotor assembly, wherein the stator assembly is fixed in the motor housing, and the rotor assembly passes through the inner side of the stator assembly and is rotatably arranged in the motor housing. The stator assembly may include a winding structure, and the winding structure may be formed by winding a plurality of coils. Depending on the winding method of the coil, the winding structure may be a stacked winding. In a traditional 72-slot parallel 2-branch three-phase stacked winding, the winding structure is generally set to an even number of layers, such as 6 layers, 8 layers or 10 layers. However, the winding structure with an even number of layers usually has the problem of high power and low torque. In order to meet the peak torque output, there is an improved method in the prior art to optimize the winding structure with an even number of layers to a winding structure with an odd number of layers, for example, a winding structure with 7 layers. However, after the improvement of the existing odd-layer winding structure, the incoming and outgoing positions are not centralized. When the phase copper busbar at the incoming position and the star point copper busbar at the outgoing position are integrated into an integral busbar assembly, the structural span is large and is prone to failure due to vibration. Utility Model Content

[0003] Based on this, the present application provides an odd-layer winding structure, a stator assembly and a motor to improve the problem of non-centralized input and output positions of the three-phase stacked winding with 72 slots, 7 layers and 2 branches in parallel in the prior art.

[0004] In the first aspect, the present application provides an odd-layer winding structure, which is used for a stator assembly. The number of poles of the stator assembly is 2p poles and the number of phases is three phases. The stator assembly also includes a stator core, and the stator core is provided with 72 stator slots along the circumferential direction. The stator slots have a, b, c, d, e, f and g, a total of 7 slot layers. The slot layers a, b, c, d, e, f and g are respectively close to the axis of the stator core in the radial direction of the stator core. The odd-layer winding structure includes winding lines of three phases, U, V and W, and the winding lines of each phase include two parallel winding lines. The winding branches of each winding branch enter from the a slot layer and are wound in the b, c, d, e, f and g slot layers in sequence, and then continue to be wound in the g slot layer, and then are wound in the f, e, d, c, b and a slot layers in sequence, and then the cycle is repeated until the wire is output from the a slot layer; the two winding branches of any phase enter from two consecutive stator slots and output from two consecutive stator slots; the winding circuits of the V phase and the W phase are obtained by sequentially shifting the winding circuit of the U phase by 72 / 3p stator slots and 72*2 / 3p stator slots, respectively.

[0005] In one embodiment, each winding branch includes several first coils, which are used for stacking. The first coils include a first effective edge, a first welding end and a first hairpin end. There are two first effective edges, which are spaced apart in two stator slots. There are two first welding ends, which are respectively connected to one end of the two first effective edges on the same side. The two first welding ends are close to each other, and the first hairpin end is connected to the other end of the two first effective edges on the same side.

[0006] In one embodiment, each winding branch also includes a second coil, and several first coils are stacked to form several stacked windings. The second coil connects two consecutive stacked windings. The second coil includes a second effective edge, a second welding end, and a second hairpin end. There are two second effective edges, which are spaced apart in the two stator slots. There are two second welding ends, which are respectively connected to one end of the two second effective edges on the same side. The two second welding ends extend in the same direction, and the second hairpin end connects the other end of the two second effective edges on the same side.

[0007] In one embodiment, each winding branch further includes an introduction wire and a lead-out wire, each winding branch is introduced by the introduction wire and led out by the lead-out wire, the introduction wire includes an introduction effective edge, an introduction welding end and an introduction hairpin end, the introduction welding end and the introduction hairpin end are respectively arranged at the two ends of the introduction effective edge, and are arranged on the same side of the introduction effective edge, the lead-out wire includes an output effective edge, a lead-out welding end and a output hairpin end, the lead-out welding end and the output hairpin end are respectively arranged at the two ends of the output effective edge, and are arranged on the same side of the output effective edge.

[0008] In one embodiment, p=4, the first winding branch of the U phase is:

[0009] 1a-10b-1c-10d-1e-10f-1g-10g-19f-10e-19d-10c-19b-10a-20a-29b-20c-29d-20e-29f-20g-29 g-38f-29e-38d-29c-38b-29a-21a-30b-21c-30d-21e-30f-21g-30g-39f-30e-39d-30c-39b-30a- 38a-47b-38c-47d-38e-47f-38g-47g-55f-46e-55d-46c-55b-46a-39a-48b-39c-48d-39e-48f-39 g-48g-56f-47e-56d-47c-56b-47a-55a-64b-55c-64d-55e-64f-55g-64g-3f-66e-3d-66c-3b-66a;

[0010] The second winding branch of the U phase is:

[0011] 2a-11b-2c-11d-2e-11f-2g-11g-20f-11e-20d-11c-20b-11a-3a-12b-3c-12d-3 e-12f-3g-12g-21f-12e-21d-12c-21b-12a-19a-28b-19c-28d-19e-28f-19g-28 g-37f-28e-37d-28c-37b-28a-37a-46b-37c-46d-37e-46f-37g-46g-57f-48e-5 7d-48c-57b-48a-56a-65b-56c-65d-56e-65f-56g-65g-2f-65e-2d-65c-2b-65a.

[0012] In one embodiment, the odd-layer winding structure further includes a phase copper busbar, which corresponds one-to-one to the three phases, and is connected to the incoming line positions of the two winding branches of the corresponding phases. The phase copper busbar includes a first copper busbar piece and a first terminal, and the first terminal is connected one-to-one to the winding branches, and the first copper busbar piece is connected to the two first terminals.

[0013] In one embodiment, the odd-layer winding structure also includes a star-point copper busbar, which is connected to the outgoing line positions of a total of 6 winding branches of three phases. The star-point copper busbar includes a second copper busbar and a second terminal, the second terminal corresponds one-to-one to the winding branch, and the second copper busbar is connected to 6 second terminals.

[0014] In one embodiment, the phase copper bars and the star-point copper bar are fixed together via a fixing structure, and the three phase copper bars and the star-point copper bar are insulated.

[0015] In a second aspect, the present application provides a stator assembly, which includes any odd-layer winding structure provided in the present application.

[0016] In a third aspect, the present application provides a motor, comprising any one of the stator assemblies provided in the present application.

[0017] The present application winds each winding branch in a stator slot through a reasonable slot layer sequence, and can obtain a winding structure with 72 slots, 7 layers, and 2 branches in parallel. The present application also arranges the line entry and line exit positions of the two parallel winding branches of each phase in two consecutive stator slots, and by sequentially shifting the winding line of the U phase by 72 / 3p stator slots 710 and 72*2 / 3p stator slots to obtain the winding lines of the V phase and the W phase, respectively, so that the line entry and line exit positions of the total of 6 winding branches of the three phases can be centralized. When preparing a busbar assembly, the winding structure provided by the present application can reduce the structural span of the busbar assembly and reduce the risk of failure of the busbar assembly due to vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a stator assembly to which the odd-layer winding structure provided in Example 1 of the present application is applicable;

[0019] Figure 2 This is a schematic diagram of a conductor slot layer of a stator assembly to which the odd-layer winding structure provided in Example 1 of the present application is applicable;

[0020] Figure 3 A schematic diagram of an odd-layer winding structure provided in Example 1 of the present application;

[0021] Figure 4A schematic structural diagram of a first coil of an odd-layer winding structure provided in Example 1 of the present application;

[0022] Figure 5 A schematic structural diagram of a second coil of an odd-layer winding structure provided in the first embodiment of the present application;

[0023] Figure 6 A schematic structural diagram of the lead-in wire or lead-out wire of the odd-layer winding structure provided in Example 1 of the present application;

[0024] Figure 7 A schematic diagram of the U-phase winding circuit of the odd-layer winding structure provided in Example 1 of the present application;

[0025] Figure 8 A schematic structural diagram of a phase copper bar of an odd-layer winding structure provided in Example 1 of the present application;

[0026] Figure 9 This is a structural schematic diagram of the star point copper busbar of the odd-layer winding structure provided in Example 1 of the present application.

[0027] Figure numerals: 100, first coil; 110, first effective side; 120, first welding end; 130, first hairpin end; 200, second coil; 210, second effective side; 220, second welding end; 230, second hairpin end; 300, lead-in wire; 310, lead-in effective side; 320, lead-in welding end; 330, lead-in hairpin end; 400, lead-out wire; 410, lead-out effective side; 420, lead-out welding end; 430, lead-out hairpin end; 500, phase copper busbar; 510, first copper busbar; 520, first terminal; 600, star point copper busbar; 610, second copper busbar; 620, second terminal; 700, stator core; 710, stator slot. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0030] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not intended to limit the conditions under which the present invention can be implemented. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in this utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0031] Terms such as "upper," "lower," "left," "right," "center," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification to indicate positions or locations are based on those shown in the accompanying drawings and are intended solely for ease of description. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Example 1

[0033] The first embodiment of the present application provides an odd-layer winding structure, which is used for a stator assembly. The stator assembly has 2p poles and three phases. The stator assembly also includes a stator core 700. The stator core 700 is provided with 72 stator slots 710 along the circumferential direction. The stator slots 710 have a total of 7 slot layers, namely a, b, c, d, e, f and g. The slot layers a, b, c, d, e, f and g are arranged radially close to the axis of the stator core 700 in sequence. The odd-layer winding structure includes winding lines for three phases, namely U, V and W. The winding line of each phase includes two parallel winding lines. The two winding branches are connected, each winding branch enters the wire from the a slot layer, and is wound in the b, c, d, e, f and g slot layers in sequence, then continues to be wound in the g slot layer, and then is wound in the f, e, d, c, b and a slot layers in sequence, and then repeats this cycle until the wire is output from the a slot layer; the two winding branches of any phase enter the wire from two consecutive stator slots 710 and output from two consecutive stator slots 710; the winding circuits of the V phase and the W phase are obtained by sequentially shifting the winding circuit of the U phase by 72 / 3p stator slots 710 and 72*2 / 3p stator slots 710, respectively.

[0034] like Figure 1 and Figure 2As shown, in this embodiment, for example, the stator assembly may include a stator core 700 and a winding structure wound on the stator core 700. The winding structure in this application is an odd-layer winding structure. In the stator assembly, the stator core 700 may be formed by punching and stacking a plurality of stators, and it has a hollow cylindrical structure. On the inner side of the stator core 700, 72 stator slots 710 may be arranged at equal intervals along the circumference. For each stator slot 710, 7 slot layers may be provided. Slot layer is used to indicate the radial position of the stator slot 710 along the stator core 700; along the radial direction of the stator core 700, the 7 slot layers of the stator slot 710 may be represented by the serial numbers "a", "b", "c", "d", "e", "f", and "g", respectively. In some embodiments, the slot layers of the stator slot 710 may also be represented by other serial numbers, such as the numbers 1-7. The aforementioned serial numbers are only for the convenience of describing the slot layers of the stator slot 710 and are not used to limit the stator slot 710. Meanwhile, the slot layers a, b, c, d, e, f, and g may be sequentially close to the axis of the stator core 700 along the radial direction of the stator core 700.

[0035] like Figure 1 and Figure 3 As shown, the winding structure is partially wound in the stator slot 710, and the winding structure can be set as a structure similar to a rotating body, which can be coaxially arranged with the stator core 700, and both ends can extend to the outside of the end of the stator core 700. The three phases of the stator assembly can be U phase, V phase and W phase respectively; and correspondingly, the winding structure can include winding circuits of three phases, U, V and W. Similarly, the serial numbers "U", "V" and "W" are only for the convenience of describing the three phases of the stator assembly, and are not used to limit the three phases. For any phase, it includes 2 parallel winding branches. When any winding branch is wound, it enters the wire from the a slot layer, and is wound in the b, c, d, e, f and g slot layers in sequence, and then continues to be wound in the g slot layer, and then is wound in the f, e, d, c, b and a slot layers in sequence;

[0036] That is, the slot layer sequence is “?a-?b-?c-?d-?e-?f-?g-?g-?f-?e-?d-?c-?b-?a”, where “?” represents the serial number of the stator slot 710;

[0037] After that, the loop is repeated in the order of the slot layers. At the same time, any winding branch is routed from slot layer a.

[0038] like Figure 3As shown, in this embodiment, in any phase, when its two winding branches are input, their input positions are distributed in two consecutive stator slots 710, for example, in the two stator slots 710 numbered "1" and "2". At the same time, their output positions when outputting are also distributed in two consecutive stator slots 710. For the three phases, the winding circuit of any phase can be translated to obtain the winding circuits of the other two phases, where "translation" can be understood as moving the winding circuit in the direction of increasing or decreasing the serial number of the stator slot 710. For the U phase in this embodiment, it translates 72 / 3p stator slots 710 and 72*2 / 3p stator slots 710 in turn to obtain the winding circuits of the V phase and the W phase respectively, where p represents the number of pole pairs of the stator assembly. For example, for a three-phase winding structure with 72 slots, 8 poles, 7 layers, and 2 parallel branches, the V-phase and W-phase winding circuits can be obtained by shifting the U-phase winding circuit by 6 and 12 stator slots 710, respectively. It is not difficult to see that the entry and exit locations of the six winding branches across the three phases are relatively concentrated.

[0039] It is understandable that the present application winds each winding branch in the stator slot 710 through a reasonable slot layer sequence, and can obtain a winding structure with 72 slots, 7 layers, and 2 branches in parallel. The present application sets the line entry and line exit positions of the two parallel winding branches of each phase in two consecutive stator slots 710, and by sequentially shifting the winding line of the U phase by 72 / 3p stator slots 710 and 72*2 / 3p stator slots 710 to obtain the winding lines of the V phase and the W phase respectively, the line entry and line exit positions of the total of 6 winding branches of the three phases can be centralized. When preparing a busbar assembly, the winding structure provided by the present application can reduce the structural span of the busbar assembly and reduce the risk of failure of the busbar assembly due to vibration.

[0040] Specifically, each winding branch includes several first coils 100, which are used for stacking. The first coils 100 include a first effective edge 110, a first welding end 120 and a first hairpin end 130. There are two first effective edges 110, which are spaced apart in two stator slots 710. There are two first welding ends 120, which are respectively connected to one end of the two first effective edges 110 on the same side. The two first welding ends 120 are close to each other, and the first hairpin end 130 is connected to the other end of the two first effective edges 110 on the same side.

[0041] like Figure 3 and Figure 4As shown, in this embodiment, for illustrative purposes, the portion of the coil arranged within the stator slot 710 can be referred to as the active side, with the two ends of the active side being connected to a welding end and a hairpin end, respectively. The coil is typically fabricated integrally from copper wire. For example, the coil is made of flat copper wire. In this case, the stator assembly is suitable for a flat wire motor. Two consecutive coils are typically connected by welding, and the two coils can be connected via their welding ends. Each winding branch is stacked using a first coil 100. Due to its U-shaped shape, the first coil 100 can be referred to as an Up-in wire. The first coil 100 has two active sides, namely, first active sides 110, which are arranged within two stator slots 710, respectively. The spacing between the two stator slots 710 is the pitch of the first coil 100. For example, when the two active sides of the first coil 100 are arranged within stator slots 710 numbered "1" and "10," respectively, the pitch of the first coil 100 is 9 slots. Correspondingly, the first coil 100 has two welding ends, namely, first welding ends 120. To facilitate overlapping winding, the two first welding ends 120 are positioned close together. There is only one hairpin end, which can be configured in a V-shaped structure, with the two ends of the V connected to the two first effective sides 110. When the two first coils 100 are connected, they are each welded and secured via one of the first welding ends 120, achieving continuous winding.

[0042] It can be understood that, in this embodiment, by reasonably setting the shape and structure of the first coil 100 , it is convenient for each winding branch to be overlapped, so as to further form a desired winding structure.

[0043] More specifically, each winding branch also includes a second coil 200. Several first coils 100 are stacked to form several stacked windings. The second coil 200 connects two consecutive stacked windings. The second coil 200 includes a second effective edge 210, a second welding end 220 and a second hairpin end 230. There are two second effective edges 210, which are spaced apart in two stator slots 710. There are two second welding ends 220, which are respectively connected to one end of the two second effective edges 210 on the same side. The two second welding ends 220 extend in the same direction. The second hairpin end 230 connects the other end of the two second effective edges 210 on the same side.

[0044] like Figure 3 and Figure 5As shown, in this embodiment, when several first coils 100 are stacked, several stacked windings are formed. Two consecutive stacked windings are connected via a second coil 200. Similarly, the second coil 200 is also an Up-in wire. The second coil 200 includes two second active edges 210, which are also arranged in two stator slots 710. The second coil 200 also has two second welding ends 220, which extend in the same direction. There is also only one hairpin end, which is also configured in a V-shaped structure, with its ends connected to the two second active edges 210. When the second active edge 210 connects two stacked windings, it connects to the two first coils 100, and its two second welding ends 220 are welded to one first welding end 120 of the two first coils 100, thereby achieving the same continuous winding effect.

[0045] It can be understood that, in this embodiment, by reasonably setting the shape and structure of the second coil 200 , it is convenient to connect two consecutive stacked windings, so as to further form a desired winding structure.

[0046] More specifically, each winding branch also includes an introduction wire 300 and a lead-out wire 400. Each winding branch is introduced by the introduction wire 300 and is led out by the lead-out wire 400. The introduction wire 300 includes an introduction effective edge 310, an introduction welding end 320 and an introduction hairpin end 330. The introduction welding end 320 and the introduction hairpin end 330 are respectively arranged at the two ends of the introduction effective edge 310 and on the same side of the introduction effective edge 310. The lead-out wire 400 includes an lead-out effective edge 410, a lead-out welding end 420 and a lead-out hairpin end 430. The lead-out welding end 420 and the lead-out hairpin end 430 are respectively arranged at the two ends of the lead-out effective edge 410 and on the same side of the lead-out effective edge 410.

[0047] like Figure 3 and Figure 6As shown, in this embodiment, each winding branch is wound using an inlet wire 300, followed by a first coil 100 for lap winding. Two consecutive lap windings are connected by a second coil 200, and finally, a lead-out wire 400 is used for winding. The inlet wire 300 and the lead-out wire 400 have similar structures and are shaped like an "I," thus being referred to as "Ip in" wires. Each inlet wire 300 and the lead-out wire 400 includes only one active side: an inlet active side 310 and an outlet active side 410, respectively. Each also includes only one soldering end and one hairpin end: an inlet soldering end 320 and an inlet hairpin end 330, respectively, and an outlet soldering end 420 and an outlet hairpin end 430, respectively. The inlet soldering end 320 and the inlet hairpin end 330 are located at either end of the inlet active side 310. Furthermore, when the inlet soldering end 320 and the inlet hairpin end 330 are located on the same side of the inlet active side 310, they are located on the left and right sides of the inlet active side 310. Similarly, the connection relationship and distribution of the lead-out soldering terminal 420 and the lead-out card terminal 430 with the lead-out effective edge 410 are similar. Both the lead-in wire 300 and the lead-out wire 400 are connected to a first coil 100. During connection, the lead-in wire 300 is welded to a first soldering terminal 120 of the first coil 100 via its lead-in soldering terminal 320; while the lead-out wire 400 is welded to a first soldering terminal 120 of the first coil 100 via its lead-out soldering terminal 420.

[0048] It can be understood that, by providing the lead-in wire 300 and the lead-out wire 400, the lead-in position and the lead-out position of each winding branch can be distributed at the end where the hairpin end of the coil is located, which can avoid the first coil 100 being used for lead-in or lead-out, thereby avoiding the need to extend the first welding end 120 of the first coil 100, thereby reducing the number of wire types of the first coil 100.

[0049] More specifically, p=4, the first winding branch of phase U is:

[0050] 1a-10b-1c-10d-1e-10f-1g-10g-19f-10e-19d-10c-19b-10a-20a-29b-20c-29d-20e-29f-20g-29 g-38f-29e-38d-29c-38b-29a-21a-30b-21c-30d-21e-30f-21g-30g-39f-30e-39d-30c-39b-30a- 38a-47b-38c-47d-38e-47f-38g-47g-55f-46e-55d-46c-55b-46a-39a-48b-39c-48d-39e-48f-39 g-48g-56f-47e-56d-47c-56b-47a-55a-64b-55c-64d-55e-64f-55g-64g-3f-66e-3d-66c-3b-66a;

[0051] The second winding branch of phase U is:

[0052] 2a-11b-2c-11d-2e-11f-2g-11g-20f-11e-20d-11c-20b-11a-3a-12b-3c-12d-3 e-12f-3g-12g-21f-12e-21d-12c-21b-12a-19a-28b-19c-28d-19e-28f-19g-28 g-37f-28e-37d-28c-37b-28a-37a-46b-37c-46d-37e-46f-37g-46g-57f-48e-5 7d-48c-57b-48a-56a-65b-56c-65d-56e-65f-56g-65g-2f-65e-2d-65c-2b-65a.

[0053] like Figure 1 As shown, in this embodiment, for example, the stator slots 710 can be sequentially numbered using the serial numbers "1-72". The serial numbers "1-72" are also only for the convenience of describing the stator slots 710, and are not used to limit the stator slots 710. At the same time, any stator slot 710 in the circumferential direction of the stator core 700 can be numbered "1".

[0054] The winding is explained by taking the first winding branch of phase U as an example.

[0055] like Figure 7 As shown, in this embodiment, the line corresponding to "1a" is the lead-in line 300, and its lead-in effective edge 310 is set in the slot layer a of the stator slot 710 with the serial number "1". Figure 7U1 in FIG. The circuit "10b-1c" corresponds to the first first coil 100, whose two first active sides 110 are respectively arranged in the b slot layer of the stator slot 710 numbered "10" and the c slot layer of the stator slot 710 numbered "1." The pitch of this first coil 100 is 9 slots. The subsequent circuits are similar, with the circuit "10b-1c-10d-1e-10f-1g" corresponding to the first lap winding, and the circuit "10e-19d-10c-19b" corresponding to the second lap winding. These two lap windings are connected by the second coil 200 represented by the circuit "10g-19f," which has a pitch of 9 slots. The same applies to the subsequent winding lines, where "10a-20a" corresponds to the second coil 200, and the pitch of the second coil 200 is 10 slots; "29a-21a" corresponds to the second coil 200, and the pitch of the second coil 200 is 8 slots. The line corresponding to "66a" is the lead-out line 400, and its lead-out effective edge 410 is set in the slot layer a of the stator slot 710 with the serial number "66". Figure 7 X1 in.

[0056] The second winding branch of phase U can be obtained in the same way. Its lead wire 400 corresponds to line "2a". Figure 7 U2 in the figure; the line corresponding to the lead wire 400600 is "65a", refer to Figure 7 X2 in.

[0057] like Figure 3 As shown, in this embodiment, since p=4, the winding structure in this embodiment is a three-phase winding structure with 72 slots, 8 poles, 7 layers and 2 parallel branches. The winding circuits of the V phase and W phase can be obtained by shifting the winding circuit of the U phase by 6 and 12 stator slots 710 respectively. Based on this, the two winding branches of the V phase are connected through "7a" and "8a". Figure 3 V1 and V2 in; at the same time, "71a" and "72a" are connected, refer to Figure 3 The two winding branches of phase W are connected through "13a" and "14a", refer to Figure 3 W1 and W2 in; at the same time, "5a" and "6a" are connected, refer to Figure 3 Z1 and Z2 in .

[0058] It can be understood that this embodiment reasonably sets the winding sequence of the two parallel winding branches of the U phase, so that each winding branch is conveniently connected with the lead-in wire 300 for input, with a plurality of first coils 100 for stacking, with the second coil 200 connecting two consecutive stacked windings, and with the lead-out wire 400 for output, thereby achieving the purpose of winding to obtain the desired winding structure.

[0059] Of course, in some embodiments, the winding structure may not include lead-in wires 300 and lead-out wires 400. In this case, each winding branch has one welded end of a first coil 100 as its lead-in wire and one welded end of a first coil 100 as its lead-out wire. It is readily apparent that in this embodiment, the positions of the coil welded ends are opposite to those in the previous embodiment. For example, in the first winding branch of the U phase, the line corresponding to "1a-10b" represents the first first coil 100, whose two first active edges 110 are respectively located in slot layer a of the stator slot 710 numbered "1" and slot layer b of the stator slot 710 numbered "10." The pitch of this first coil 100 is 9 slots. The following circuits are similarly constructed. The circuit "1a-10b-1c-10d-1e-10f" represents the first lapped winding, and the circuit "19f-10e-19d-10c-19b-10a" represents the second lapped winding. These two lapped windings are connected by the second coil 200 represented by the circuit "1g-10g," which has a pitch of 9 slots. The following winding circuits are similarly constructed, with the circuit "3b-66a" representing the final first coil 100.

[0060] Specifically, the odd-layer winding structure also includes a phase copper bus 500, which corresponds one-to-one to the three phases. The phase copper bus 500 is connected to the incoming line positions of the two winding branches of the corresponding phases. The phase copper bus 500 includes a first copper bus piece 510 and a first terminal 520. The first terminal 520 is connected one-to-one to the winding branches, and the first copper bus piece 510 is connected to the two first terminals 520.

[0061] like Figure 3 and Figure 8 As shown, in this embodiment, it is exemplified that the phase copper busbar 500 is used to connect the two winding branches of any phase in parallel, which corresponds one-to-one to the three phases of the stator assembly, that is, it is set to three. The phase copper busbar 500 may include a first copper busbar piece 510 and a first terminal 520, and the first copper busbar piece 510 and the first terminal 520 may be integrally formed. The first terminal 520 may be set to a flat structure, and the shape of its cross section may be similar to the shape of the cross section of the coil. The first terminal 520 corresponds one-to-one to the winding branch, that is, any phase copper busbar 500 in this embodiment includes two first terminals 520. The first terminal 520 is used to connect to the incoming line position of the winding branch. The first terminal 520 of this embodiment can be welded and fixed to the introduction hairpin end 330 of the introduction line 300, refer to Figure 3U1 U2, V1V2, and W1W2 in the winding structure. The first copper bar 510 can be arc-shaped and arranged along the circumference of the winding structure, connecting the two first terminals 520. It is not difficult to see that the circumferential span of the phase copper bar 500 is the circumferential span of its first copper bar 510, that is, the spacing between its two first terminals 520. In this embodiment, the two parallel winding branches of any phase are connected in two consecutive stator slots 710, so the phase copper bar 500 in this embodiment has a relatively small span.

[0062] It can be understood that, in this embodiment, by providing the phase copper busbar 500 , two winding branches of the same phase are connected in parallel, so that the winding structure forms the required three-phase circuit when the winding is completed.

[0063] More specifically, the odd-layer winding structure also includes a star point copper bus 600, which is connected to the outgoing line positions of the six winding branches of the three phases. The star point copper bus 600 includes a second copper bus 610 and a second terminal 620. The second terminals 620 correspond one-to-one to the winding branches, and the second copper bus 610 is connected to the six second terminals 620.

[0064] like Figure 3 and Figure 9 As shown, in this embodiment, it is exemplified that the star point copper bus 600 is used to connect the outgoing line position of the winding structure, which can be set to only one, and is connected to the outgoing line positions of the three phases, a total of 6 winding branches. The star point copper bus 600 may include a second copper bus 610 and a second terminal 620, and the second copper bus 610 and the second terminal 620 may also be integrally formed. The second terminal 620 corresponds to the 6 winding branches one by one, that is, 6 second terminals 620 are provided. The structure of the second terminal 620 is similar to that of the first terminal 520, and it can be welded and fixed to the lead-out card end 430 of the lead-out wire 400, with reference to FIG. Figure 3 The second copper busbar 610 can also be configured as an arc, connecting the six second terminals 620. Similarly, since the three phases are located at a relatively short distance from each other in this embodiment, the star point copper busbar 600 in this embodiment also has a relatively small span.

[0065] It is understandable that, in this embodiment, by providing the star point copper bus 600 , it is convenient to connect the outgoing line positions of the winding structure, so that the winding structure forms the required three-phase circuit when the winding is completed.

[0066] Of course, in some embodiments, the star point copper bus 600 may also correspond to the number of winding branches of the same phase, that is, in this embodiment, there are two star point copper buses 600, one of which may be connected to the outgoing line positions of the first winding branches of the three phases, and the other star point copper bus 600 may be connected to the outgoing line positions of the second winding branches of the three phases.

[0067] More specifically, the phase copper bars 500 and the star point copper bar 600 are fixed together via a fixing structure, and the three phase copper bars 500 and the star point copper bar 600 are all insulated.

[0068] like Figure 3 As shown, in this embodiment, for illustrative purposes, the three phase copper bars 500 must be insulated from the star point copper bar 600 to prevent short circuits. In this embodiment, the three phase copper bars 500 and the star point copper bar 600 can also be fixed together via a fixing structure to form a busbar assembly, facilitating connection to the three phase windings. The fixing structure can be injection molded. When the three phase copper bars 500 and the star point copper bar 600 are injection molded within the fixing structure, they can maintain high structural stability.

[0069] The implementation principle of an odd-layer winding structure provided in the first embodiment of the present application is as follows:

[0070] When preparing the winding structure, the winding circuits of the three phases are wound on the stator core 700. For any phase, any winding branch enters the a slot layer and is wound in the b, c, d, e, f and g slot layers in sequence, then continues to be wound in the g slot layer, and then is wound in the f, e, d, c, b and a slot layers in sequence, and then repeats this cycle until the wire exits the a slot layer. At the same time, the two winding branches of any phase enter the wire from two consecutive stator slots 710 and exit from two consecutive stator slots 710. The winding circuits of the V phase and the W phase are obtained by sequentially shifting the winding circuit of the U phase by 72 / 3p stator slots 710 and 72*2 / 3p stator slots 710, respectively. At the same time, the three phase copper bars 500 and the star point copper bar 600 are injection molded into one piece through a fixing structure; then the two first terminals 520 of the phase copper bar 500 are respectively welded and fixed to the incoming line positions of the two winding branches of their corresponding phases, and the six second terminals 620 of the star point copper bar 600 are respectively welded and fixed to the outgoing line positions of the six winding branches of the three phases.

[0071] The present application winds each winding branch in a stator slot 710 through a reasonable slot layer sequence, and can obtain a winding structure with 72 slots, 7 layers, and 2 branches in parallel. The present application also arranges the line entry and line exit positions of the two parallel winding branches of each phase in two consecutive stator slots 710, and by sequentially shifting the winding line of the U phase by 72 / 3p stator slots 710 and 72*2 / 3p stator slots 710 to obtain the winding lines of the V phase and the W phase, respectively, so that the line entry and line exit positions of the 6 winding branches of the three phases can be centralized. When preparing a busbar assembly, the winding structure provided by the present application can reduce the structural span of the busbar assembly and reduce the risk of failure of the busbar assembly due to vibration.

[0072] Example 2

[0073] Embodiment 2 of the present application provides a stator assembly, which includes any odd-layer winding structure provided in the present application.

[0074] Example 3

[0075] Embodiment 3 of the present application provides a motor, which includes any stator assembly provided in the present application.

[0076] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An odd-layer winding structure, the odd-layer winding structure being used for a stator assembly, the stator assembly having 2p poles and three phases, the stator assembly further comprising a stator core (700), the stator core (700) being provided with 72 stator slots (710) along a circumferential direction, the stator slots (710) having a total of 7 slot layers, namely, a, b, c, d, e, f, and g, the slot layers a, b, c, d, e, f, and g being arranged in a radial direction of the stator core (700) close to the axis of the stator core (700), and characterized in that: The odd-numbered layer winding structure includes winding circuits for a total of three phases, namely, U, V, and W. The winding circuit of each phase includes two parallel winding branches. Each winding branch enters from the a slot layer and is sequentially wound in the b, c, d, e, f, and g slot layers, then continues to be wound in the g slot layer, and then sequentially wound in the f, e, d, c, b, and a slot layers, and then repeats this cycle until the winding is output from the a slot layer. The two winding branches of any phase enter from two consecutive stator slots (710) and output from two consecutive stator slots (710). The winding circuits of the V phase and the W phase are obtained by sequentially shifting the winding circuit of the U phase by 72 / 3p stator slots (710) and 72*2 / 3p stator slots (710), respectively.

2. The odd-layer winding structure according to claim 1, characterized in that: Each winding branch includes a plurality of first coils (100), the first coils (100) are used for stacking, the first coils (100) include a first effective edge (110), a first welding end (120) and a first hairpin end (130), two first effective edges (110) are provided, and are spaced apart in two stator slots (710), two first welding ends (120) are provided, and are respectively connected to one end of the two first effective edges (110) located on the same side, the two first welding ends (120) are close to each other, and the first hairpin end (130) is connected to the other end of the two first effective edges (110) located on the same side.

3. The odd-layer winding structure according to claim 2, characterized in that: Each winding branch further includes a second coil (200), a plurality of the first coils (100) are stacked to form a plurality of stacked winding groups, the second coil (200) connects two consecutive stacked winding groups, the second coil (200) includes a second effective edge (210), a second welding end (220) and a second hairpin end (230), two second effective edges (210) are provided, and are spaced apart in two stator slots (710), two second welding ends (220) are provided, and are respectively connected to one end of the two second effective edges (210) located on the same side, the two second welding ends (220) extend in the same direction, and the second hairpin end (230) connects the other end of the two second effective edges (210) located on the same side.

4. The odd-layer winding structure according to claim 3, characterized in that: Each winding branch further comprises an incoming wire (300) and an outgoing wire (400). Each winding branch is fed in by the incoming wire (300) and led out by the outgoing wire (400). The incoming wire (300) comprises an incoming effective edge (310), an incoming welding end (320), and an incoming hairpin end (330). The incoming welding end (320) and the incoming hairpin end (330) are respectively arranged at two ends of the incoming effective edge (310) and on the same side of the incoming effective edge (310). The outgoing wire (400) comprises an outgoing effective edge (410), an outgoing welding end (420), and an outgoing hairpin end (430). The outgoing welding end (420) and the outgoing hairpin end (430) are respectively arranged at two ends of the outgoing effective edge (410) and on the same side of the outgoing effective edge (410).

5. The odd-layer winding structure according to claim 3 or 4, characterized in that: The first winding branch of the U phase is: 1a-10b-1c-10d-1e-10f-1g-10g-19f-10e-19d-10c-19b-10a-20a-29b-20c-29d-20e-29f-20g-29 g-38f-29e-38d-29c-38b-29a-21a-30b-21c-30d-21e-30f-21g-30g-39f-30e-39d-30c-39b-30a- 38a-47b-38c-47d-38e-47f-38g-47g-55f-46e-55d-46c-55b-46a-39a-48b-39c-48d-39e-48f-39 g-48g-56f-47e-56d-47c-56b-47a-55a-64b-55c-64d-55e-64f-55g-64g-3f-66e-3d-66c-3b-66a; The second winding branch of the U phase is: 2a-11b-2c-11d-2e-11f-2g-11g-20f-11e-20d-11c-20b-11a-3a-12b-3c-12d-3 e-12f-3g-12g-21f-12e-21d-12c-21b-12a-19a-28b-19c-28d-19e-28f-19g-28 g-37f-28e-37d-28c-37b-28a-37a-46b-37c-46d-37e-46f-37g-46g-57f-48e-5 7d-48c-57b-48a-56a-65b-56c-65d-56e-65f-56g-65g-2f-65e-2d-65c-2b-65a.

6. The odd-layer winding structure according to claim 1, characterized in that: The odd-numbered layer winding structure further includes a phase copper bar (500), wherein the phase copper bar (500) corresponds to the three phases one by one, and the phase copper bar (500) is connected to the line-in positions of the two winding branches of the corresponding phases, and the phase copper bar (500) includes a first copper bar component (510) and a first terminal (520), wherein the first terminal (520) is connected to the winding branches one by one, and the first copper bar component (510) is connected to two first terminals (520).

7. The odd-layer winding structure according to claim 6, characterized in that: The odd-numbered layer winding structure further comprises a star point copper bar (600), wherein the star point copper bar (600) is connected to the outlet positions of a total of six winding branches of three phases, and the star point copper bar (600) comprises a second copper bar (610) and a second terminal (620), wherein the second terminal (620) corresponds one-to-one to the winding branch, and the second copper bar (610) is connected to six second terminals (620).

8. The odd-layer winding structure according to claim 7, characterized in that: The phase copper bars (500) and the star point copper bars (600) are fixed together via a fixing structure, and the three phase copper bars (500) and the star point copper bars (600) are all insulated.

9. A stator assembly, characterized in that: The stator assembly comprises the odd-layer winding structure according to any one of claims 1 to 8.

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

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