Three-phase flat wire stator winding and motor stator

Abstract

The invention relates to a three-phase flat wire stator winding, which comprises a stator iron core and flat wire windings, and is characterized in that six-branch flat wire windings are connected in series to form a three-branch flat wire winding through a plurality of connecting flat wires with the same span; a plurality of iron core grooves are evenly distributed in the inner side of the stator iron core in the circumferential direction, and the U-shaped flat wires penetrate through the iron core grooves and are led out from the welding end of the stator iron core. The (2k-1) th layer of U-shaped flat wire led out from the welding end deflects towards the first direction by a first angle; the U-shaped flat wire of the 2k layer led out from the welding end deflects towards a second direction by a second angle; the (2k + 1) th layer of U-shaped flat wire led out from the welding end deflects towards the first direction by a third angle; the (2k + 2) th layer of U-shaped flat wire led out from the welding end deflects towards the second direction by a fourth angle; the sum of the first angle and the second angle and the sum of the third angle and the fourth angle range from 55 degrees to 65 degrees, and the first angle, the third angle and the fourth angle are not equal; wherein k is an odd number. Compared with the prior art, the invention has the advantages of low manufacturing difficulty, high safety and the like.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a three-phase flat wire stator winding and a motor stator. Background Art

[0002] In recent years, flat wire motors have demonstrated better economy and driving comfort in the automotive industry with better power density, better heat dissipation and lower noise. Therefore, in today's new energy track, the market share of flat wire motors is increasing year by year. However, the production line investment of flat wire motors is high, the technology iteration of flat wire motors is fast, and higher requirements are placed on electromagnetic, structural, and process personnel related to motor design.

[0003] Conventional flat wire motors require the required flat copper wires to be bent into U-shape and I-shape, namely Upin wire and Ipin wire, and then insert Upin wire and Ipin wire into the stator core from the hairpin end, and then connect the flat copper wires at the stator core welding end to achieve circuit conduction of each branch. Finally, a large number of three-phase copper bars, neutral copper bars, and bridge copper bars are used to connect each branch to ensure the safe operation of the motor.

[0004] At present, flat wire stators still have the following problems: (1) Flat wire stator windings are composed of flat copper wires of various shapes and specifications. The more wire types there are, the more molding molds are required, and the higher the stator manufacturing cost; (2) When welding flat wire stators, in order to improve the insulation performance, a certain safety distance needs to be set between the two adjacent layers of the twist head end. If the high-voltage motor needs to increase the safety distance, the copper wire consumption will increase significantly; (3) Most flat wire motors have flat copper wires with different numbers of slots, and flat wires with different numbers of slots are likely to increase the end height of the stator. (4) The line layout of the flat wire winding is scattered, and multiple line types are crossed with each other. The wiring process is complicated, and wiring errors are difficult to detect. Summary of the invention

[0005] The purpose of the present invention is to provide a three-phase flat wire stator winding and a motor stator to overcome the defects in the above-mentioned prior art that when welding a flat wire stator, in order to increase the insulation performance, a certain safety distance needs to be set between two adjacent layers of the twist head end. If the high-voltage motor needs to increase the safety distance, the copper wire consumption will be significantly increased and the difficulty of wiring will be increased.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a three-phase flat wire stator winding, comprising a stator core and a flat wire winding, wherein the flat wire winding is a 6-branch flat wire winding, wherein the U-shaped flat wire comprises a plurality of connecting flat wires with the same span, wherein the connecting flat wires connect the 6-branch flat wire windings in series into a 3-branch flat wire winding; wherein a plurality of core slots are evenly distributed in the circumferential direction on the inner side of the stator core, wherein the flat wire winding comprises a plurality of U-shaped flat wires, wherein the U-shaped flat wires pass through the core slots and are led out from the welding end of the stator core, wherein the core slots comprise multiple layers of U-shaped flat wires;

[0008] The U-shaped flat wire of the 2k-1 layer led out from the welding end is deflected toward the first direction at a first angle; the U-shaped flat wire of the 2k layer led out from the welding end is deflected toward the second direction at a second angle; the U-shaped flat wire of the 2k+1 layer led out from the welding end is deflected toward the first direction at a third angle; the U-shaped flat wire of the 2k+2 layer led out from the welding end is deflected toward the second direction at a fourth angle; the sum of the first angle and the second angle and the sum of the third angle and the fourth angle are in the range of 55-65°, and the first angle, the third angle and the fourth angle are not equal to each other; wherein k is an odd number.

[0009] Specifically, the first direction is a clockwise direction opposite to the welding end, and the second direction is a counterclockwise direction opposite to the welding end.

[0010] Preferably, the sum of the first angle and the second angle is equal to the sum of the third angle and the fourth angle.

[0011] Preferably, the first branch and the fifth branch, the second branch and the sixth branch, and the third branch and the fourth branch of the flat wire winding are respectively connected by connecting flat wires, and two ends of the connecting flat wires are respectively located at the same layer of different core slots.

[0012] Preferably, both ends of the connecting flat wire are located at one end of the core slot close to the central axis of the stator core, and the connecting flat wire contacts the inner side wall of the core slot.

[0013] Preferably, the stator core includes 54 core slots, and each phase winding of the flat wire winding is arranged in sequence from the S1 core slot in the direction of increasing core slot number. The core slots of the stator core include an L1 slot layer, and the number of the connecting flat wires is 9. One end of each connecting flat wire is respectively inserted into the L1 layer S46 core slot, the L1 layer S47 core slot, the L1 layer S48 core slot, the L1 layer S49 core slot, the L1 layer S50 core slot of the stator core. core slot, L1 layer S51 core slot, L1 layer S52 core slot, L1 layer S53 core slot and L1 layer S54 core slot; the other end of each connecting flat wire is respectively inserted into the L1 layer S1 core slot, L1 layer S2 core slot, L1 layer S3 core slot, L1 layer S4 core slot, L1 layer S5 core slot, L1 layer S6 core slot, L1 layer S7 core slot, L1 layer S8 core slot and L1 layer S9 core slot of the stator core.

[0014] Preferably, the U-shaped flat wire includes a connecting flat wire, a first flat wire and a second flat wire, the connecting flat wire is used to connect branches of the flat wire winding, the second flat wire is combined with the first flat wire to form the main part of the flat wire winding, the second flat wire is located at the outer end of the first flat wire, the tops of the connecting flat wire and the first flat wire are pointed structures, and the top of the second flat wire is a flat top structure.

[0015] Preferably, the flat wire winding further comprises an I-shaped flat wire, the I-shaped flat wire is respectively connected to the power input end and the power output end of each branch, the I-shaped flat wire is located at the bottom of the core slot, and the I-shaped flat wire is arranged in a plurality of core slots with consecutive serial numbers;

[0016] The stator core includes 54 core slots, and the phase windings of the flat wire windings are arranged in sequence from the S1 core slot in the direction of increasing core slot numbers. The core slots of the stator core include an L8 slot layer, and the number of I-type flat wires is 18. One end of each I-type flat wire is respectively inserted into the S1 core slot, S2 core slot, S3 core slot, S4 core slot, S5 core slot, S6 core slot, S7 core slot, S8 core slot, S9 core slot, S10 core slot, S11 core slot, S12 core slot, S13 core slot, S14 core slot, S15 core slot, S16 core slot, S17 core slot and S18 core slot of the L8 layer.

[0017] Preferably, the stator winding comprises a symmetrically distributed U phase, a V phase and a W phase, each of which has three branches, the input ends of the three branches of the U phase are respectively connected to the I-type flat wires in the S1 core slot, the S2 core slot and the S3 core slot, and the output ends corresponding to the three branches of the U phase are respectively connected to the I-type flat wires in the S12 core slot, the S10 core slot and the S11 core slot;

[0018] The input ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S7 core slot, the S8 core slot and the S9 core slot, and the corresponding output ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S18 core slot, the S16 core slot and the S17 core slot;

[0019] The input ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S13 core slot, the S14 core slot and the S15 core slot, and the corresponding output ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S6 core slot, the S4 core slot and the S5 core slot.

[0020] As a general technical concept, the present solution also provides a motor stator, including the above-mentioned three-phase flat wire stator winding.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) In this scheme, the U-shaped flat wires whose stator core welding ends are located at the odd-numbered layers of the core slots are deflected in a first direction at a certain angle, and the corresponding U-shaped flat wires whose stator core welding ends are located at the even-numbered layers of the core slots are deflected in a second direction at a certain angle. At the same time, the deflection angles of the U-shaped flat wires at the welding ends of the layers are set to different values, so that the connection points of the U-shaped flat wires have a larger distance between each other after deflection, which is convenient for subsequent welding operations on the one hand, and improves the insulation between the flat wires on the other hand, thereby improving the safety performance of the flat wire winding.

[0023] (2) This solution uses U-shaped flat wires with the same span and arranges the U-shaped flat wires in the same layer of the core slots, connecting the six-branch flat wire windings in series into three-branch flat wire windings, thereby reducing the types of U-shaped flat wires and the cost of processing and producing the U-shaped flat wires. At the same time, the U-shaped flat wires are arranged in the same layer of the core slots, making the arrangement more regular, reducing the difficulty of installing the U-shaped flat wires and improving the accuracy and efficiency of installing the flat wire windings.

[0024] (3) This solution sets the top of the connecting flat wire and the first flat wire, i.e., the flat wire with spans of 8 and 9, to a pointed top structure, and sets the top of the second flat wire, i.e., the flat wire with span 11, to a flat top structure. Considering that the second flat wire is arranged on the outside of the first flat wire, the top of the second flat wire is set to a flat top structure to facilitate the coordination between the two, while reducing the end height of the flat wire winding and improving the axial bearing capacity of the flat wire winding. Since the number of the second flat wires is small, the second flat wire is chosen to be set to a flat top structure, which reduces the overall manufacturing difficulty of the U-shaped flat wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of the flat wire stator provided by the present invention;

[0026] Figure 2 A cross-sectional view of a flat wire stator provided by the present invention;

[0027] Figure 3 A schematic structural diagram of a stator core welding end provided by the present invention;

[0028] Figure 4 for Figure 3 A magnified view of the local structure at point A in the middle;

[0029] Figure 5 A schematic diagram of the end surface structure of the stator core provided by the present invention;

[0030] Figure 6 for Figure 5 A partial enlarged view of

[0031] Figure 7 A branch connection line diagram of the flat wire winding provided by the present invention;

[0032] Figure 8 A schematic diagram of the connection between the busbar and the I-shaped flat wire provided by the present invention;

[0033] Fig. 9 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the 7th and 8th layers of the stator core respectively;

[0034] Fig.10 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the sixth and seventh layers of the stator core respectively;

[0035] Fig.11 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the fifth and sixth layers of the stator core respectively;

[0036] Fig.12 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the 4th and 5th layers of the stator core respectively;

[0037] Fig.13 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the third and fourth layers of the stator core respectively;

[0038] Fig.14 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the second and third layers of the stator core respectively;

[0039] Fig.15 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention, with its two ends occupying the first layer and the second layer of the stator core respectively;

[0040] Fig.16 A schematic diagram of a U-shaped flat copper wire connection provided by the present invention with both ends located at the first layer of the stator core;

[0041] In the figure: 1. stator core, 11. hairpin end, 12. welding end, 2. flat wire winding, 201. Upin-1-1-9 flat copper wire, 202. Upin-1-2-11 flat copper wire, 203. Upin-1-2-8 flat copper wire, 204. Upin-2-3-11 flat copper wire, 205. Upin-2-3-8 flat copper wire, 206. Upin-3-4-11 flat copper wire, 207. Upin-3-4-8 flat copper wire, 208. Upin-4-5-11 flat copper wire, 209 .Upin-4-5-8 flat copper wire, 210.Upin-5-6-11 flat copper wire, 211.Upin-5-6-8 flat copper wire, 212.Upin-6-7-11 flat copper wire, 213.Upin-6-7-8 flat copper wire, 214.Upin-7-8-11 flat copper wire, 215.Upin-7-8-8 flat copper wire, 216.Ipin flat copper wire; 3.Bus busbar, 301.U phase copper busbar, 302.V direction copper busbar, 303.W phase copper busbar, 304.Neutral line copper busbar. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0046] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] Example 1

[0049] This embodiment provides a three-phase flat wire stator winding, such as Figure 1 As shown, it includes a stator core 1 and a flat wire winding 2, wherein the flat wire winding is a 6-branch flat wire winding, wherein the U-shaped flat wire includes a plurality of connecting flat wires with the same span, wherein the connecting flat wires connect the 6-branch flat wire windings in series into a 3-branch flat wire winding; a plurality of core slots are evenly distributed circumferentially on the inner side of the stator core 1, and the flat wire winding 2 includes a plurality of U-shaped flat wires, wherein the U-shaped flat wires pass through the core slots and are led out from the welding end of the stator core 1, and the core slots include multiple layers of U-shaped flat wires;

[0050] The U-shaped flat wire of the 2k-1 layer led out from the welding end is deflected toward the first direction at a first angle; the U-shaped flat wire of the 2k layer led out from the welding end is deflected toward the second direction at a second angle; the U-shaped flat wire of the 2k+1 layer led out from the welding end is deflected toward the first direction at a third angle; the U-shaped flat wire of the 2k+2 layer led out from the welding end is deflected toward the second direction at a fourth angle; the sum of the first angle and the second angle and the sum of the third angle and the fourth angle are in the range of 55-65°, and the first angle, the third angle and the fourth angle are not equal to each other; wherein k is an odd number.

[0051] The first direction is the clockwise direction opposite to the welding end, that is, the direction in which the core slot number increases, and the second direction is the counterclockwise direction opposite to the welding end, that is, the direction in which the core slot number increases. The sum of the first angle and the second angle is equal to the sum of the third angle and the fourth angle.

[0052] By deflecting the U-shaped flat wire whose stator core welding end is located in the odd-numbered layers of the core slot toward the direction close to the central axis of the stator core 1 by a certain angle, the corresponding U-shaped flat wire whose stator core welding end is located in the even-numbered layers of the core slot is deflected toward the direction away from the central axis of the stator core 1 by a certain angle, and at the same time setting the deflection angle of each layer of the U-shaped flat wire at the welding end to different values, so that the connection points of the U-shaped flat wire have a larger spacing between each other after deflection, on the one hand, it is convenient for subsequent welding operations, and on the other hand, it improves the insulation between the flat wires, thereby improving the safety performance of the flat wire winding. In this embodiment, the first angle is selected as 30 degrees, the second angle is selected as 30 degrees, the third angle is selected as 33.3 degrees, and the fourth angle is selected as 26.7 degrees. The twisting angles of each layer of the twisting end of the flat wire stator are set to different values. After twisting, the connection points of the Upin flat copper wire can have a larger spacing between each other, thereby increasing the insulation performance and safety performance of the flat wire stator.

[0053] As a preferred implementation, the first branch and the fifth branch, the second branch and the sixth branch, and the third branch and the fourth branch of the flat wire winding are respectively connected by connecting flat wires, and both ends of the connecting flat wires are located at the same layer of different core slots.

[0054] By using U-shaped flat wires of the same span and arranging the U-shaped flat wires in the same layer of the core slots, the six-branch flat wire windings are connected in series into three-branch flat wire windings, thereby reducing the types of U-shaped flat wires and the cost of processing and producing the U-shaped flat wires.

[0055] Both ends of the connecting flat wire are located at one end of the core slot close to the central axis of the stator core 1, and the connecting flat wire contacts the inner wall of the core slot. The connecting flat wire is evenly arranged on the innermost side of the stator core 1, which is more regular, convenient for fixing and reduces the error rate, thereby improving production efficiency.

[0056] The stator core 1 includes 54 core slots. The phase windings of the flat wire winding 2 are arranged in sequence from the S1 core slot in the direction of increasing core slot numbers. The core slots of the stator core 1 include an L1 slot layer. The number of connecting flat wires is 9. One end of each connecting flat wire is respectively inserted into the L1 layer S46 core slot, the L1 layer S47 core slot, the L1 layer S48 core slot, the L1 layer S49 core slot, the L1 layer S50 core slot, and the L1 layer S51 core slot of the stator core 1. 1 layer S51 core slot, L1 layer S52 core slot, L1 layer S53 core slot and L1 layer S54 core slot; the other end of each connecting flat wire is respectively inserted into the L1 layer S1 core slot, L1 layer S2 core slot, L1 layer S3 core slot, L1 layer S4 core slot, L1 layer S5 core slot, L1 layer S6 core slot, L1 layer S7 core slot, L1 layer S8 core slot and L1 layer S9 core slot of the stator core 1.

[0057] The U-shaped flat wire includes a connecting flat wire, a first flat wire and a second flat wire. The connecting flat wire is used to connect the branch of the flat wire winding. The second flat wire is combined with the first flat wire to form the main part of the flat wire winding. The second flat wire is located at the outer end of the first flat wire. The tops of the connecting flat wire and the first flat wire are pointed structures, and the top of the second flat wire is a flat top structure. By designing the ends of a part of the flat copper wires to be pointed tops with relatively simple manufacturing processes, and designing the ends of the other part of the flat copper wires to be flat top structures with more stable external force resistance, not only the production process difficulty of the flat wire stator can be reduced, but also the wire package height of the flat wire winding can be reduced.

[0058] In this embodiment, Upin-7-8-8, Upin-6-7-8, Upin-5-6-8, Upin-4-5-8, Upin-3-4-8, Upin-2-3-8, Upin-1-2-8, and Upin-1-1-9, which have a large number of Upin wires, are designed to have a pointed top structure, and Upin-7-8-11, Upin-6-7-11, Upin-5-6-11, Upin-4-5-11, Upin-3-4-11, Upin-2-3-11, and Upin-1-2-11, which have a small number of Upin wires and bear a large external load, are designed to have a flat top structure, thereby reducing the manufacturing difficulty of the flat wire stator, reducing the end height of the flat wire winding, and improving the carrying capacity of the stator.

[0059] The flat wire winding 2 also includes an I-type flat wire, which is respectively connected to the power input end and the power output end of each branch, and is located at the bottom of the core slot. The I-type flat wire is arranged in a plurality of core slots with consecutive serial numbers.

[0060] The stator core 1 includes 54 core slots, and the phase windings of the flat wire winding 2 are arranged in sequence from the S1 core slot in the direction of increasing core slot numbers. The core slots of the stator core 1 include an L8 slot layer, and the number of I-type flat wires is 18. One end of each I-type flat wire is respectively inserted into the S1 core slot, S2 core slot, S3 core slot, S4 core slot, S5 core slot, S6 core slot, S7 core slot, S8 core slot, S9 core slot, S10 core slot, S11 core slot, S12 core slot, S13 core slot, S14 core slot, S15 core slot, S16 core slot, S17 core slot and S18 core slot of the L8 layer.

[0061] The stator winding includes symmetrically distributed U phase, V phase and W phase, each of which has three branches, the input ends of the three branches of the U phase are respectively connected to the I-shaped flat wires in the S1 core slot, the S2 core slot and the S3 core slot, and the output ends corresponding to the three branches of the U phase are respectively connected to the I-shaped flat wires in the S12 core slot, the S10 core slot and the S11 core slot;

[0062] The input ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S7 core slot, the S8 core slot and the S9 core slot, and the corresponding output ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S18 core slot, the S16 core slot and the S17 core slot;

[0063] The input ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S13 core slot, the S14 core slot and the S15 core slot, and the corresponding output ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S6 core slot, the S4 core slot and the S5 core slot.

[0064] This embodiment also provides a specific wiring structure of the flat wire winding, which is:

[0065] A flat wire motor stator comprises a stator core 1, a flat wire winding 2, and a busbar 3. Figure 2-5 As shown, the flat wire winding 2 is composed of a number of Upin-1-1-9 flat copper wires 201, Upin-1-2-11 flat copper wires 202, Upin-1-2-8 flat copper wires 203, Upin-2-3-11 flat copper wires 204, Upin-2-3-8 flat copper wires 205, Upin-3-4-11 flat copper wires 206, Upin-3-4-8 flat copper wires 207, Upin-4-5- The busbar 3 is composed of a U-phase copper bar 301, a V-phase copper bar 302, a W-phase copper bar 303, and a neutral copper bar 304.

[0066] In this embodiment, the stator core 1 includes 8 layers of flat wires, the first angle is 30°, the second angle is 30°, the third angle is 33.3°, and the fourth angle is 26.7°. The three phases U, V, and W are balanced, and the branches U1, U2, U3, V1, V2, V3, W1, W2, and W3 are balanced to avoid the influence of circulating current.

[0067] Among them, Upin-ABC refers to a U-shaped flat copper wire, one end of which is inserted into the A layer of the stator core, and the other end is inserted into the B layer of the stator core. The difference in the number of slots between the A layer and the B layer is C.

[0068] like Figure 6-8 As shown, 18 Ipin flat copper wires 216 are used to insert into the S1, S2 ... S18 core slots of the L8th layer of the stator core 1. Figure 6As shown, the flat wire winding branch is connected, the Ipin flat copper wire 216 led out of the S1, S2, S3 core slots is the current input line U1+, U2+ and U3+, U1+, U2+, U3+ are connected to the U phase copper bar 301; the Ipin flat copper wire 216 led out of the S7, S8, S9 core slots is the current input line V1+, V2 and V3+, V1+, V2+, V3+ are connected to the V phase copper bar 302; S13, S14, S The Ipin flat copper wires 216 led out of the 15 core slots are current input wires W1+, W2+ and W3+, and W1+, W2+, and W3+ are connected to the W-phase copper bar 303; the Ipin flat copper wires 216 led out of the S4, S5, S6, S10, S11, S12, S16, S17, and S18 core slots are current output wires W5-, W6-, W6-, U5-, U6-, U4-, V5-, V6-, and V4-. W5-, W6-, W4-, U5-, U6-, U4-, V5-, V6-, and V4- are connected to the neutral copper bar 304. In this way, all the Ipin wires are gathered in the 18 core slots adjacent to each other in the L8 layer of the stator core 1. Since the 18 core slots are adjacent to each other, the coverage of the busbar is reduced, and the flat wire winding 2 only requires 4 copper bars to achieve the connection of the flat wire winding, which simplifies the welding process and is conducive to improving production efficiency.

[0069] like Fig. 9As shown, 24 Upin-7-8-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L7 layer S11 core slot and the L8 layer S19 core slot, the L7 layer S12 core slot and the L8 layer S20 core slot, the L7 layer S14 core slot and the L8 layer S22 core slot, the L7 layer S15 core slot and the L8 layer S23 core slot, the L7 layer S17 core slot and the L 8-layer S25 core slot, L7-layer S18 core slot and L8-layer S26 core slot, L7-layer S20 core slot and L8-layer S28 core slot, L7-layer S21 core slot and L8-layer S29 core slot, L7-layer S23 core slot and L8-layer S31 core slot, L7-layer S24 core slot and L8-layer S31 core slot, L7-layer S26 core slot and L8-layer S34 core slot, L The 7th layer S27 core slot and the L8th layer S35 core slot, the L7th layer S29 core slot and the L8th layer S37 core slot, the L7th layer S30 core slot and the L8th layer S38 core slot, the L7th layer S32 core slot and the L8th layer S40 core slot, the L7th layer S33 core slot and the L8th layer S41 core slot, the L7th layer S35 core slot and the L8th layer S43 core slot, the L7th layer S36 core slot and The L8 layer S44 core slot, the L7 layer S38 core slot and the L8 layer S46 core slot, the L7 layer S39 core slot and the L8 layer S47 core slot, the L7 layer S41 core slot and the L8 layer S49 core slot, the L7 layer S42 core slot and the L8 layer S50 core slot, the L7 layer S44 core slot and the L8 layer S52 core slot, the L7 layer S45 core slot and the L8 layer S53 core slot;

[0070] Use 12 Upin-7-8-11 flat copper wires, and insert the two ends of the flat copper wires into the L7 layer S10 core slot and the L8 layer S21 core slot, the L7 layer S13 core slot and the L8 layer S24 core slot, the L7 layer S16 core slot and the L8 layer S27 core slot, the L7 layer S19 core slot and the L8 layer S30 core slot, the L7 layer S22 core slot and the L8 layer S33 core slot, and the L7 layer S34 core slot. The core slots of layer S25 and layer S36 of layer L8, the core slots of layer S28 of layer L7 and layer S39 of layer L8, the core slots of layer S31 of layer L7 and layer S42 of layer L8, the core slots of layer S34 of layer L7 and layer S45 of layer L8, the core slots of layer S37 of layer L7 and layer S48 of layer L8, the core slots of layer S40 of layer L7 and layer S51 of layer L8, the core slots of layer S43 of layer L7 and layer S54 of layer L8;

[0071] The Upin-7-8-8 end is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the Upin-7-8-11 end as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0072] like Fig.10As shown, 12 Upin-6-7-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L6 layer S1 core slot and the L7 layer S47 core slot, the L6 layer S2 core slot and the L7 layer S48 core slot, the L6 layer S4 core slot and the L7 layer S50 core slot, the L6 layer S5 core slot and the L7 layer S51 core slot, the L6 layer S7 core slot and the L7 layer S53 core slot, The L6 layer S8 core slot and the L7 layer S54 core slot, the L6 layer S10 core slot and the L7 layer S2 core slot, the L6 layer S11 core slot and the L7 layer S3 core slot, the L6 layer S13 core slot and the L7 layer S5 core slot, the L6 layer S14 core slot and the L7 layer S6 core slot, the L6 layer S16 core slot and the L7 layer S8 core slot, the L6 layer S17 core slot and the L7 layer S9 core slot;

[0073] Use 6 Upin-6-7-11 flat copper wires and insert the two ends of the flat copper wires into the L6 layer S3 core slot and the L7 layer S46 core slot, the L6 layer S6 core slot and the L7 layer S49 core slot, the L6 layer S9 core slot and the L7 layer S52 core slot, the L6 layer S12 core slot and the L7 layer S1 core slot, the L6 layer S15 core slot and the L7 layer S4 core slot, and the L6 layer S18 core slot and the L7 layer S7 core slot of the stator core.

[0074] The Upin-6-7-8 end is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the Upin-6-7-11 end as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0075] like Fig.11As shown, 24 Upin-5-6-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L5 layer S11 core slot and the L6 layer S19 core slot, the L5 layer S12 core slot and the L6 layer S20 core slot, the L5 layer S14 core slot and the L6 layer S22 core slot, the L5 layer S15 core slot and the L6 layer S23 core slot, the L5 layer S17 core slot and the L 6-layer S25 core slot, L5-layer S18 core slot and L6-layer S26 core slot, L5-layer S20 core slot and L6-layer S28 core slot, L5-layer S21 core slot and L6-layer S29 core slot, L5-layer S23 core slot and L6-layer S31 core slot, L5-layer S24 core slot and L6-layer S31 core slot, L5-layer S26 core slot and L6-layer S34 core slot, L 5-layer S27 core slot and L6-layer S35 core slot, L5-layer S29 core slot and L6-layer S37 core slot, L5-layer S30 core slot and L6-layer S38 core slot, L5-layer S32 core slot and L6-layer S40 core slot, L5-layer S33 core slot and L6-layer S41 core slot, L5-layer S35 core slot and L6-layer S43 core slot, L5-layer S36 core slot and The L6 layer S44 core slot, the L5 layer S38 core slot and the L6 layer S46 core slot, the L5 layer S39 core slot and the L6 layer S47 core slot, the L5 layer S41 core slot and the L6 layer S49 core slot, the L5 layer S42 core slot and the L6 layer S50 core slot, the L5 layer S44 core slot and the L6 layer S52 core slot, the L5 layer S45 core slot and the L6 layer S53 core slot;

[0076] Use 12 Upin-5-6-11 flat copper wires, insert the two ends of the stator core into the L5 layer S10 core slot and the L6 layer S21 core slot, the L5 layer S13 core slot and the L6 layer S24 core slot, the L5 layer S16 core slot and the L6 layer S27 core slot, the L5 layer S19 core slot and the L6 layer S30 core slot, the L5 layer S22 core slot and the L6 layer S33 core slot, and the L5 layer S The 25 core slot and the L6 layer S36 core slot, the L5 layer S28 core slot and the L6 layer S39 core slot, the L5 layer S31 core slot and the L6 layer S42 core slot, the L5 layer S34 core slot and the L6 layer S45 core slot, the L5 layer S37 core slot and the L6 layer S48 core slot, the L5 layer S40 core slot and the L6 layer S51 core slot, the L5 layer S43 core slot and the L6 layer S54 core slot;

[0077] The Upin-5-6-8 end is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the Upin-5-6-11 end as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0078] like Fig.12As shown, 12 Upin-4-5-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L4 layer S1 core slot and the L5 layer S47 core slot, the L4 layer S2 core slot and the L5 layer S48 core slot, the L4 layer S4 core slot and the L5 layer S50 core slot, the L4 layer S5 core slot and the L5 layer S51 core slot, the L4 layer S7 core slot and the L5 layer S53 core slot, The L4 layer S8 core slot and the L5 layer S54 core slot, the L4 layer S10 core slot and the L5 layer S2 core slot, the L4 layer S11 core slot and the L5 layer S3 core slot, the L4 layer S13 core slot and the L5 layer S5 core slot, the L4 layer S14 core slot and the L5 layer S6 core slot, the L4 layer S16 core slot and the L5 layer S8 core slot, the L4 layer S17 core slot and the L5 layer S9 core slot;

[0079] Use 6 Upin-4-5-11 flat copper wires and insert the two ends of the flat copper wires into the L4 layer S3 core slot and the L5 layer S46 core slot, the L4 layer S6 core slot and the L5 layer S49 core slot, the L4 layer S9 core slot and the L5 layer S52 core slot, the L4 layer S12 core slot and the L5 layer S1 core slot, the L4 layer S15 core slot and the L5 layer S4 core slot, and the L4 layer S18 core slot and the L5 layer S7 core slot of the stator core.

[0080] The end of Upin-4-5-8 is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the end of Upin-4-5-11 as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0081] like Fig.13As shown, 24 Upin-3-4-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L3 layer S11 core slot and the L4 layer S19 core slot, the L3 layer S12 core slot and the L4 layer S20 core slot, the L3 layer S14 core slot and the L4 layer S22 core slot, the L3 layer S15 core slot and the L4 layer S23 core slot, the L3 layer S17 core slot and the L 4-layer S25 core slot, L3-layer S18 core slot and L4-layer S26 core slot, L3-layer S20 core slot and L4-layer S28 core slot, L3-layer S21 core slot and L4-layer S29 core slot, L3-layer S23 core slot and L4-layer S31 core slot, L3-layer S24 core slot and L4-layer S31 core slot, L3-layer S26 core slot and L4-layer S34 core slot, L 3-layer S27 core slot and L4-layer S35 core slot, L3-layer S29 core slot and L4-layer S37 core slot, L3-layer S30 core slot and L4-layer S38 core slot, L3-layer S32 core slot and L4-layer S40 core slot, L3-layer S33 core slot and L4-layer S41 core slot, L3-layer S35 core slot and L4-layer S43 core slot, L3-layer S36 core slot and The L4 layer S44 core slot, the L3 layer S38 core slot and the L4 layer S46 core slot, the L3 layer S39 core slot and the L4 layer S47 core slot, the L3 layer S41 core slot and the L4 layer S49 core slot, the L3 layer S42 core slot and the L4 layer S50 core slot, the L3 layer S44 core slot and the L4 layer S52 core slot, the L3 layer S45 core slot and the L4 layer S53 core slot;

[0082] Use 12 Upin-3-4-11 flat copper wires, insert the two ends of the stator core into the L3 layer S10 core slot and the L4 layer S21 core slot, the L3 layer S13 core slot and the L4 layer S24 core slot, the L3 layer S16 core slot and the L4 layer S27 core slot, the L3 layer S19 core slot and the L4 layer S30 core slot, the L3 layer S22 core slot and the L4 layer S33 core slot, and the L3 layer S The 25 core slot and the L4 layer S36 core slot, the L3 layer S28 core slot and the L4 layer S39 core slot, the L3 layer S31 core slot and the L4 layer S42 core slot, the L3 layer S34 core slot and the L4 layer S45 core slot, the L3 layer S37 core slot and the L4 layer S48 core slot, the L3 layer S40 core slot and the L4 layer S51 core slot, the L3 layer S43 core slot and the L4 layer S54 core slot;

[0083] The Upin-3-4-8 end is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the Upin-3-4-11 end as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0084] like Fig.14As shown, 12 Upin-2-3-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L2 layer S1 core slot and the L3 layer S47 core slot, the L2 layer S2 core slot and the L3 layer S48 core slot, the L2 layer S4 core slot and the L3 layer S50 core slot, the L2 layer S5 core slot and the L3 layer S51 core slot, the L2 layer S7 core slot and the L3 layer S53 core slot, The L2 layer S8 core slot and the L3 layer S54 core slot, the L2 layer S10 core slot and the L3 layer S2 core slot, the L2 layer S11 core slot and the L3 layer S3 core slot, the L2 layer S13 core slot and the L3 layer S5 core slot, the L2 layer S14 core slot and the L3 layer S6 core slot, the L2 layer S16 core slot and the L3 layer S8 core slot, the L2 layer S17 core slot and the L3 layer S9 core slot;

[0085] Use 6 Upin-2-3-11 flat copper wires and insert the two ends of the flat copper wires into the L2 layer S3 core slot and the L3 layer S46 core slot, the L2 layer S6 core slot and the L3 layer S49 core slot, the L2 layer S9 core slot and the L3 layer S52 core slot, the L2 layer S12 core slot and the L3 layer S1 core slot, the L2 layer S15 core slot and the L3 layer S4 core slot, and the L2 layer S18 core slot and the L3 layer S7 core slot of the stator core.

[0086] The end of Upin-2-3-8 is designed as a pointed top structure to reduce the difficulty of Upin flat copper wire manufacturing process. By setting the end of Upin-2-3-11 as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0087] like Fig.15As shown, 24 Upin-1-2-8 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L1 layer S11 core slot and the L2 layer S19 core slot, the L1 layer S12 core slot and the L2 layer S20 core slot, the L1 layer S14 core slot and the L2 layer S22 core slot, the L1 layer S15 core slot and the L2 layer S23 core slot, the L1 layer S17 core slot and the L 2-layer S25 core slot, L1-layer S18 core slot and L2-layer S26 core slot, L1-layer S20 core slot and L2-layer S28 core slot, L1-layer S21 core slot and L2-layer S29 core slot, L1-layer S23 core slot and L4-layer S31 core slot, L1-layer S24 core slot and L2-layer S31 core slot, L1-layer S26 core slot and L2-layer S34 core slot, L The 1st layer S27 core slot and the L2 layer S35 core slot, the L1 layer S29 core slot and the L2 layer S37 core slot, the L1 layer S30 core slot and the L2 layer S38 core slot, the L1 layer S32 core slot and the L2 layer S40 core slot, the L1 layer S33 core slot and the L2 layer S41 core slot, the L1 layer S35 core slot and the L2 layer S43 core slot, the L1 layer S36 core slot and The L2 layer S44 core slot, the L1 layer S38 core slot and the L2 layer S46 core slot, the L1 layer S39 core slot and the L2 layer S47 core slot, the L1 layer S41 core slot and the L2 layer S49 core slot, the L1 layer S42 core slot and the L2 layer S50 core slot, the L1 layer S44 core slot and the L2 layer S52 core slot, the L1 layer S45 core slot and the L2 layer S53 core slot;

[0088] Use 12 Upin-1-2-11 flat copper wires, insert the two ends of the stator core into the L1 layer S10 core slot and the L2 layer S21 core slot, the L1 layer S13 core slot and the L2 layer S24 core slot, the L1 layer S16 core slot and the L2 layer S27 core slot, the L1 layer S19 core slot and the L2 layer S30 core slot, the L1 layer S22 core slot and the L2 layer S33 core slot, and the L1 layer S The 25 core slot and the L2 layer S36 core slot, the L1 layer S28 core slot and the L2 layer S39 core slot, the L1 layer S31 core slot and the L2 layer S42 core slot, the L1 layer S34 core slot and the L2 layer S45 core slot, the L1 layer S37 core slot and the L2 layer S48 core slot, the L1 layer S40 core slot and the L2 layer S51 core slot, the L1 layer S43 core slot and the L2 layer S54 core slot;

[0089] The Upin-1-2-8 end is designed as a pointed top structure to reduce the difficulty of the Upin flat copper wire manufacturing process. By setting the Upin-1-2-11 end as a flat top, not only can the end height of the continuous flat wire stator be reduced, but also when the flat copper wire is pressed into the stator, its flat structure can stably withstand external loads and reduce the deformation of the flat copper wire.

[0090] like Fig.16As shown, 9 Upin-1-1-9 flat copper wires are used, and the two ends of the flat copper wires are respectively inserted into the L1 layer S46 core slot and the L1 layer S1 core slot, the L1 layer S47 core slot and the L1 layer S2 core slot, the L1 layer S48 core slot and the L1 layer S3 core slot, the L1 layer S49 core slot and the L1 layer S4 core slot, the L1 layer S50 core slot and the L1 layer S5 core slot, the L1 layer S51 core slot and the L1 layer S6 core slot, the L1 layer S52 core slot and the L1 layer S7 core slot, the L1 layer S53 core slot and the L1 layer S8 core slot, and the L1 layer S54 core slot and the L1 layer S9 core slot.

[0091] Since the 9 Upin-1-1-9 are arranged overlapping each other, there is only one layer in the axial height direction, which is conducive to the wiring process.

[0092] Upin-7-8-8, Upin-5-6-8, Upin-3-4-8 and Upin-1-2-8 flat copper wires have the same spatial arrangement order; Upin-7-8-11, Upin-5-6-11, Upin-3-4-11 and Upin-1-2-11 flat copper wires have the same spatial arrangement order; Upin-6-7-8, Upin-4-5-8 and Upin-2-3-8 have the same spatial arrangement order; Upin-6-7-11, Upin-4-5-11 and Upin-2-3-11 have the same spatial arrangement order; Upin-1-1-9 flat copper wires are arranged overlapping each other. Due to the obvious regularity of the linear distribution, the wire insertion process of the flat wire motor stator is reduced, and the risk of incorrect operation is reduced.

[0093] Optionally, the L1 layer and L5 layer led out from the stator core welding end are rotated 30° in the direction of decreasing core slot number; the L2 layer and L6 layer led out from the stator core welding end are rotated 30° in the direction of increasing core slot number; the L3 layer and L7 layer led out from the stator core welding end are rotated 33.3° in the direction of decreasing core slot number, and the L4 layer and L8 layer led out from the stator core welding end are rotated 26.7° in the direction of increasing core slot number. By connecting the twisted flat copper wire, not only can the circuit connection between the L1 layer and the L2 layer, the L3 layer and the L4 layer, the L5 layer and the L6 layer, and the L7 layer and the L8 layer be realized, but also the connection positions of the flat copper wires are ensured to have a larger spacing between each other, thereby increasing the safety performance of the flat wire stator.

[0094] This embodiment provides a motor stator, such as Figure 1As shown, the motor stator includes a stator core and the above-mentioned flat wire stator winding, and the inner wall of the stator core is circumferentially provided with 54 core slots, each core slot has 8 layers of phase windings in the same phase, and the flat wires in each core slot are arranged according to the above-mentioned flat wire arrangement method. It can be understood that in practical applications, the number of winding layers of each core slot includes but is not limited to 8 layers, and can also be 2 layers, 4 layers, or 6 layers, etc., and its winding method can refer to the above-mentioned 8-layer winding method.

[0095] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A three-phase flat wire stator winding, comprising a stator core (1) and a flat wire winding (2), characterized in that: The flat wire winding is a 6-branch flat wire winding, the U-shaped flat wire comprises a plurality of connecting flat wires with the same span, the connecting flat wires connect the 6-branch flat wire windings in series to form a 3-branch flat wire winding; a plurality of core slots are evenly distributed in the circumferential direction on the inner side of the stator core (1), the flat wire winding (2) comprises a plurality of U-shaped flat wires, the U-shaped flat wires pass through the core slots and are led out from the welding end of the stator core (1), and the core slots comprise multiple layers of U-shaped flat wires; The U-shaped flat wire of the 2k-1 layer led out from the welding end is deflected toward the first direction at a first angle; the U-shaped flat wire of the 2k layer led out from the welding end is deflected toward the second direction at a second angle; the U-shaped flat wire of the 2k+1 layer led out from the welding end is deflected toward the first direction at a third angle; the U-shaped flat wire of the 2k+2 layer led out from the welding end is deflected toward the second direction at a fourth angle; the sum of the first angle and the second angle and the sum of the third angle and the fourth angle are in the range of 55-65°, and the first angle, the third angle and the fourth angle are not equal to each other; wherein k is an odd number.

2. A three-phase flat wire stator winding according to claim 1, characterized in that: The first direction is a clockwise direction opposite to the welding end, and the second direction is a counterclockwise direction opposite to the welding end.

3. A three-phase flat wire stator winding according to claim 1, characterized in that: The sum of the first angle and the second angle is equal to the sum of the third angle and the fourth angle.

4. A three-phase flat wire stator winding according to claim 1, characterized in that: The first branch and the fifth branch, the second branch and the sixth branch, and the third branch and the fourth branch of the flat wire winding are respectively connected by connecting flat wires, and two ends of the connecting flat wires are respectively located at the same layer of different core slots.

5. A three-phase flat wire stator winding according to claim 4, characterized in that: Both ends of the connecting flat wire are located at one end of the core slot close to the central axis of the stator core (1), and the connecting flat wire contacts the inner side wall of the core slot.

6. A three-phase flat wire stator winding according to claim 4, characterized in that: The stator core (1) comprises 54 core slots, each phase winding of the flat wire winding (2) is arranged in sequence from the S1 core slot in the direction of increasing core slot number, the core slots of the stator core (1) comprise an L1 slot layer, the number of the connecting flat wires is 9, one end of each connecting flat wire is respectively inserted into the L1 layer S46 core slot, the L1 layer S47 core slot, the L1 layer S48 core slot, the L1 layer S49 core slot, the L1 layer S The other ends of the connecting flat wires are respectively inserted into the L1 layer S1 core slot, the L1 layer S2 core slot, the L1 layer S3 core slot, the L1 layer S4 core slot, the L1 layer S5 core slot, the L1 layer S6 core slot, the L1 layer S7 core slot, the L1 layer S8 core slot and the L1 layer S9 core slot of the stator core (1).

7. The three-phase flat wire stator winding according to claim 1, characterized in that: The U-shaped flat wire includes a connecting flat wire, a first flat wire and a second flat wire. The connecting flat wire is used to connect branches of the flat wire winding. The second flat wire is combined with the first flat wire to form the main part of the flat wire winding. The second flat wire is located at the outer end of the first flat wire. The tops of the connecting flat wire and the first flat wire are pointed structures, and the top of the second flat wire is a flat structure.

8. The three-phase flat wire stator winding according to claim 1, characterized in that: The flat wire winding (2) further comprises an I-shaped flat wire, wherein the I-shaped flat wire is respectively connected to the power input end and the power output end of each branch, the I-shaped flat wire is located at the bottom of the iron core slot, and the I-shaped flat wire is arranged in a plurality of iron core slots with consecutive serial numbers; The stator core (1) comprises 54 core slots, and each phase winding of the flat wire winding (2) is arranged in sequence from the S1 core slot in the direction of increasing core slot number. The core slots of the stator core (1) comprise an L8 slot layer, and the number of the I-type flat wires is 18. One end of each I-type flat wire is respectively inserted into the S1 core slot, S2 core slot, S3 core slot, S4 core slot, S5 core slot, S6 core slot, S7 core slot, S8 core slot, S9 core slot, S10 core slot, S11 core slot, S12 core slot, S13 core slot, S14 core slot, S15 core slot, S16 core slot, S17 core slot and S18 core slot of the L8 layer.

9. A three-phase flat wire stator winding according to claim 8, characterized in that: The stator winding comprises a symmetrically distributed U phase, a V phase and a W phase, wherein the U phase, the V phase and the W phase each have three branches, the input ends of the three branches of the U phase are respectively connected to the I-shaped flat wires in the S1 core slot, the S2 core slot and the S3 core slot, and the output ends corresponding to the three branches of the U phase are respectively connected to the I-shaped flat wires in the S12 core slot, the S10 core slot and the S11 core slot; The input ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S7 core slot, the S8 core slot and the S9 core slot, and the corresponding output ends of the three branches of the V phase are respectively connected to the I-type flat wires in the S18 core slot, the S16 core slot and the S17 core slot; The input ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S13 core slot, the S14 core slot and the S15 core slot, and the corresponding output ends of the three branches of the W phase are respectively connected to the I-type flat wires in the S6 core slot, the S4 core slot and the S5 core slot.

10. A motor stator, characterized in that: It comprises a three-phase flat wire stator winding as described in any one of claims 1-9.

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