Three-phase flat wire stator winding, motor stator and winding wiring process

Abstract

The invention relates to a three-phase flat wire stator winding, a motor stator and a winding wiring process, the stator winding comprises a stator iron core and flat wire windings, the stator iron core is provided with a plurality of stator slots, the flat wire windings are arranged in 2n layers along the radial direction of the stator slots, n is greater than or equal to 1, and n is a natural number; the flat wire winding comprises a plurality of U-shaped winding units, one end of each winding unit is located on a 2k-1 layer, and the other end of each winding unit is located on a 2k layer; the flat wire winding comprises diversion parts and series connection parts, the flat wire winding deflects towards a first direction from a half diversion part of a 2n layer and a 2k-1 layer led out from a welding end, and deflects towards a second direction from a series connection part of a 2n layer led out from a welding end of the flat wire winding, the rest half diversion parts and a 2k layer; the (2k-1) th layer, led out from the welding end, of the flat wire winding is connected with the (2k) th layer through the series connection part, the (2k) th layer, led out from the welding end, of the flat wire winding is connected with the (2k + 1) th layer through the diversion part, k is larger than or equal to 1 and smaller than n, and k is a natural number. Compared with the prior art, the invention has the advantages of few flat wire specifications, low flat wire wiring difficulty and the like.

Description

Technical Field

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

[0002] Compared with traditional round wire motors, flat wire motors have a higher slot fill factor advantage. At the same raw material cost, they can obtain a more significant motor power density. Moreover, due to the relatively large rigidity of the flat wire structure itself, it has an inhibitory effect on armature noise, making flat wire motor vehicles have better driving comfort. Therefore, in today's new energy vehicle industry, flat wire motors are gradually replacing round wire motors.

[0003] When the flat wire stator has a large number of Upin flat copper wires, and there are mutual nesting and crossing of wire types during the wire insertion process, for example, there are flat copper wires occupying layers 2 and 3 between the flat copper wires occupying layers 1 and 2 and layers 3 and 4, it is easy to make mistakes in wire insertion, which is not conducive to product production. Therefore, it is necessary to ensure the regularity of the wire insertion scheme of the flat wire stator. Further, in order to reduce the types of wire types used in the winding, there are related technical solutions to adjust the Upin flat copper wires with two different spans in the axial direction of the stator into Upin flat copper wires with a unified span. However, through experiments, the Upin flat copper wires with a unified span will cause circulating current in the motor, resulting in unbalanced windings, generating excessive copper losses, iron losses, and even harmonic losses, causing the motor to overheat, seriously affecting the motor performance.

[0004] Currently, the flat wire stator still has the following problems: (1) The flat wire stator winding is composed of flat copper wires of various shape specifications. The multi-wire type flat wire stator requires more forming molds, not only the manufacturing cost of the stator is relatively high, but also the mold switching is time-consuming and laborious; (2) The flat wire stator needs to perform insulation treatment on the flat copper wires with the insulation paint removed. If the flat wire stator has an Ipin wire type, it means that the positions where the paint is removed exist at both ends of the stator at the same time, and the stator needs to perform insulation treatment in two steps, increasing the process time and affecting the production line beat; (3) The flat wire motor stator needs multiple busbar copper bars to be connected to the stator winding. When the number of copper bars is large, the connection between the flat wire winding and the copper bar will be very difficult, and even make it difficult to mass-produce the product. (4) Some flat copper wires of the flat wire stator may be smaller than the inner diameter of the stator core, resulting in that the rotor matching the stator can only be assembled in one direction, restricting the flexibility of the application of the flat wire stator. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the existing technology that the flat wire winding is composed of flat copper wires of various specifications, with high manufacturing cost, and the process is relatively complex when inserting wires of various specifications, increasing the process time and the wire insertion error rate, and to provide a three-phase flat wire stator winding, a motor stator, and a winding wiring process.

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

[0007] This solution provides a three-phase flat wire stator winding, including a stator core and a flat wire winding. A plurality of stator slots are provided on the stator core. The flat wire winding passes through the stator slots and is led out from the welding end of the stator core. The flat wire winding is radially arranged in 2n layers along the stator slots, where n≥1 and n is a natural number;

[0008] The flat wire winding includes a plurality of U-shaped winding units. One end of the winding unit is located in the (2k - 1)th layer, and the other end is located in the 2kth layer; the winding unit includes a first flat wire and two second flat wires arranged side by side continuously, and the second flat wires are cross-arranged with the first flat wire;

[0009] The flat wire winding includes a current guiding part and a series connection part. Half of the current guiding part of the 2nth layer led out from the welding end of the flat wire winding and the (2k - 1)th layer deflect in the first direction, and the series connection part of the 2nth layer led out from the welding end of the flat wire winding, the remaining half of the current guiding part and the 2kth layer deflect in the second direction; the (2k - 1)th layer led out from the welding end of the flat wire winding is connected to the 2kth layer through the series connection part, and the 2kth layer led out from the welding end of the flat wire winding is connected to the (2k + 1)th layer through the current guiding part, where k≥1 and k<n, and k is a natural number.

[0010] Further, the flat wire winding is a three-phase winding. Two adjacent winding units in the circumferential direction of the flat wire winding form the phase structure of the three-phase winding. The phase structures belonging to the same phase along the circumferential direction of the flat wire winding are connected through the series connection part, and the phase structures belonging to the same phase along the axial direction of the flat wire winding are connected through the current guiding part.

[0011] Further, the stator winding further includes a U-phase copper bar, a V-phase copper bar, a W-phase copper bar and a neutral line copper bar. The current guiding part of the first layer led out from the welding end of the stator core of the flat wire winding includes 3 continuous phase structures. One winding unit of each phase structure is respectively connected to the U-phase copper bar, the V-phase copper bar and the W-phase copper bar, and the other winding unit of each phase structure is connected to the neutral line copper bar.

[0012] Further, the span of the first flat wire is 11, and the span of the second flat wire is 8.

[0013] Further, the first direction is the clockwise direction facing the welding end of the stator core, and the second direction is the counterclockwise direction facing the welding end of the stator core.

[0014] Further, the current-carrying portion of the 2n-th layer led out from the welding end of the stator core of the flat wire winding includes 6 continuously arranged winding units, and 3 consecutive ones of the winding units are deflected in the first direction, and the remaining 3 consecutive winding units are deflected in the second direction.

[0015] Further, the series portion is formed by flat wires led out from the welding end of the stator core of each winding unit of the same phase in the same two layers of the flat wire winding and deflected in opposite directions.

[0016] Further, the number of poles of the stator core is Q, and Q is a positive even number. The flat wire led out from the welding end of the stator core of the winding unit is deflected by a first angle in the first direction and by a second angle in the second direction. The range of the sum of the first angle and the second angle is between 360 / Q - 5 and 360 / Q + 5 degrees.

[0017] This solution also provides a wiring process for a three-phase flat wire stator winding, including the following steps:

[0018] S1: Insert the two ends of the second flat wire with a span of 8 in the 1st and 2nd layers of the flat wire winding into the stator slots respectively, and then insert the two ends of the first flat wire with a span of 11 in the 1st and 2nd layers of the flat wire winding into the stator slots respectively, to complete the wire insertion of the 1st and 2nd layers of the flat wire winding.

[0019] S2: Repeat S1, and sequentially arrange the (2k + 1)-th layer and the (2k + 2)-th layer of the flat wire winding in the corresponding stator slots of the stator core until all the flat wire windings are arranged in the stator slots.

[0020] S3: Perform a twisting process on the leading ends of the flat wires of each layer extending from the welding end of the stator core. Twist the flat wire of the (2k - 1)-th layer led out from the welding end of the flat wire winding and half of the current-carrying portion of the 2n-th layer in the clockwise direction, and then twist the flat wire of the 2k-th layer led out from the welding end of the flat wire winding, the series portion of the 2n-th layer, and the remaining half of the current-carrying portion in the counterclockwise direction.

[0021] S4: Connect the twisted pins correspondingly to complete the wiring of the three-phase flat wire stator winding.

[0022] This solution also provides an electric motor stator including the above three-phase flat wire stator winding.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) In this solution, the flat wire winding only includes flat wires of two specifications and is composed of several winding units with the same flat wire arrangement structure. Inserting each winding unit into the stator slots as required can complete the wire insertion. The wire insertion rule of the flat wire winding is simple, the wire insertion difficulty is low, and the wire insertion error rate is reduced. Moreover, the flat wire winding has a lead-out end from the welding end of the stator core, and the flat wires of adjacent layers are twisted in opposite directions. With the connection of the current guiding part and the series connection part, a complete circuit is formed, avoiding the use of type-I flat wires, reducing the wire arrangement and processing time of type-I flat wires, and optimizing the process rhythm.

[0025] (2) For the wire arrangement of the existing flat wire winding, generally, a special cross-layer connecting flat wire is set, which will increase the wire arrangement difficulty and the cost of flat wires. In this solution, the flat wires led out from the welding ends of adjacent layers of the flat wire winding are deflected in opposite directions, and the corresponding flat wires between different layers are processed and welded, avoiding the use of cross-layer flat wires, further simplifying the flat wire structure, and the cross-layer connection structure is simple and reliable.

[0026] (3) In order to reduce the linear specifications, flat copper wires with a unified pitch can be used, but it will cause circulating current in the motor, making the winding unbalanced, generating excessive copper loss, iron loss and even harmonic loss, resulting in excessive heating of the motor and seriously affecting the performance of the motor. In this application, it is composed of two types of flat wires with pitches of 8 and 11, and with the symmetrical and balanced arrangement of the three-phase circuit of the flat wire winding, the generation of circulating current in the flat wire winding is eliminated, ensuring the safety of the motor during long-term operation.

[0027] (4) In this solution, first insert the flat wire with a pitch of 8 into the corresponding stator slots of the first and second layers, then insert the flat wire with a pitch of 11 into the corresponding stator slots to complete the wire insertion of the first and second layers. Then, arrange the entire flat wire winding in the stator slots in sequence to complete the wire insertion. After that, twist and weld the lead-out ends of the flat wire winding at the welding ends, making the wiring process of the motor flat wire winding simpler and improving the production efficiency. Brief Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the stator of the flat wire motor provided by the present invention;

[0029] Figure 2 It is a cross-sectional view of the stator of the flat wire motor provided by the present invention;

[0030] Figure 3 It is a schematic structural diagram of the welding end of the stator of the flat wire motor provided by the present invention;

[0031] Figure 4 It is a schematic end face structure diagram of the stator core provided by the present invention;

[0032] Figure 5 Provided by the present invention Figure 4 Partial enlarged view of area A therein;

[0033] Figure 6 Schematic structural diagram of the winding unit with two ends respectively located on the first layer and the second layer provided by the present invention;

[0034] Figure 7 Schematic structural diagram of the winding unit with two ends respectively located on the third layer and the fourth layer provided by the present invention;

[0035] Figure 8 Schematic structural diagram of the winding unit with two ends respectively located on the fifth layer and the sixth layer provided by the present invention;

[0036] Figure 9 Schematic structural diagram of the winding unit with two ends respectively located on the seventh layer and the eighth layer provided by the present invention;

[0037] In the figure: 1, stator core; 2, flat wire winding; 3, busbar copper; 11, stator slot; 12, welding end; 21, winding unit; 211, first flat wire; 212, second flat wire; 201, Upin-1-2-11 flat copper wire; 202, Upin-1-2-8 flat copper wire; 203, Upin-3-4-11 flat copper wire; 204, Upin-3-4-8 flat copper wire; 205, Upin-5-6-11 flat copper wire; 206, Upin-5-6-8 flat copper wire; 207, Upin-7-8-11 flat copper wire; 208, Upin-7-8-8 flat copper wire; 301, U-phase copper bar; 302, V-phase copper bar; 303, W-phase copper bar; 304, center line copper bar. Detailed implementation manners

[0038] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0039] 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 claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0043] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0044] Embodiment 1

[0045] As Figures 1 to 6 shown, this embodiment provides a three-phase flat wire stator winding, including a stator core 1 and a flat wire winding ②. The stator core 1 is provided with a plurality of stator slots 11. The flat wire winding 2 passes through the stator slots 11 and is led out from the welding end of the stator core 1. The flat wire winding 2 is radially arranged in 2n layers along the stator slots 11, where n≥1 and n is a natural number;

[0046] The flat wire winding 2 includes a plurality of U-shaped winding units 21. One end of the winding unit 21 is located in the (2k - 1)th layer, and the other end is located in the 2kth layer; the winding unit 21 includes a first flat wire 211 and two second flat wires 212 arranged side by side and continuously, and the second flat wires 212 are cross-arranged with the first flat wire 211;

[0047] The flat wire winding 2 includes a current guiding part and a series part. Half of the current guiding part of the 2nth layer led out from the welding end of the flat wire winding 2 and the (2k - 1)th layer deflect in the first direction, and the series part of the 2nth layer led out from the welding end of the flat wire winding 2, the remaining half of the current guiding part, and the 2kth layer deflect in the second direction; the (2k - 1)th layer led out from the welding end of the flat wire winding 2 is connected to the 2kth layer through the series part, and the 2kth layer led out from the welding end of the flat wire winding 2 is connected to the (2k + 1)th layer through the current guiding part, where k≥1 and k<n, and k is a natural number.

[0048] By using flat wires of two specifications, the flat wire winding 2 is disassembled into several winding units 21 with the same flat wire arrangement structure. The winding units 21 are arranged to form the flat wire winding. Each winding unit 21 can be inserted into the stator slots as required to complete the wire insertion. The wire insertion rule of the flat wire winding is simple, the wire insertion difficulty is low, and the wire insertion error rate is reduced. Moreover, the flat wire winding 21 is led out from the lead end of the welded end 12 of the stator core. The flat wires of adjacent two layers are twisted in opposite directions. With the connection of the current guiding part and the series connection part, the series connection between the same-phase different winding units of the three-phase winding is completed to obtain a connected circuit, avoiding the use of type-I flat wires, reducing the wire arrangement and processing time of type-I flat wires, optimizing the process beat, reducing the production cost, and further simplifying the arrangement of flat wires.

[0049] Specifically, the flat wire winding is a three-phase winding. Two adjacent winding units 21 in the circumferential direction of the flat wire winding 2 form the phase structure of the three-phase winding. The phase structures belonging to the same phase along the circumferential direction of the flat wire winding 2 are connected through the series connection part, and the phase structures belonging to the same phase along the axial direction of the flat wire winding 2 are connected through the current guiding part.

[0050] The stator winding further includes a U-phase copper bar 301, a V-phase copper bar 302, a W-phase copper bar 303 and a neutral line copper bar 304. The current guiding part of the first layer led out from the welded end of the stator core 1 of the flat wire winding 2 includes 3 continuous phase structures. One winding unit 21 of each phase structure is respectively connected to the U-phase copper bar, the V-phase copper bar and the W-phase copper bar, and the other winding unit 21 of each phase structure is connected to the neutral line copper bar.

[0051] The flat wires led out from the welded ends of adjacent two layers of the flat wire winding are deflected in opposite directions, and the flat wires corresponding to different layers are processed and welded, avoiding the use of cross-layer flat wires, reducing the wire arrangement difficulty and flat wire cost, further simplifying the flat wire structure, and the connection structure between the cross-layer flat wires is simple and reliable.

[0052] Optionally, the span of the first flat wire 211 is 11, and the span of the second flat wire 212 is 8.

[0053] The flat wire winding is formed by arranging two flat wires with spans of 8 and 11. With the symmetrical and balanced arrangement of the three-phase circuit of the flat wire winding, the generation of the flat wire winding circulating current is eliminated, ensuring the safety of the long-term operation of the motor.

[0054] Specifically, the first direction is the clockwise direction facing the welded end of the stator core 1, and the second direction is the counterclockwise direction facing the welded end of the stator core 1.

[0055] Furthermore, the 2nth layer of the flat wire winding 2, extending from the welded end of the stator core 1, includes six consecutively arranged winding units 21, with three consecutive winding units 21 deflected in a first direction and the remaining three consecutive winding units 21 deflected in a second direction. The series connection consists of winding units 21 of the same phase located in the same two layers of the flat wire winding 2, welded together from the welded end of the stator core 1, deflected in opposite directions.

[0056] By designing the flat wire stator to have welding end outlets, not only the number of wire types required for the flat wire stator is reduced, but also all the ends of the flat copper wires are gathered on one side of the welding end, simplifying the insulation treatment process of the finished flat wire stator.

[0057] Furthermore, the number of poles of the stator core 1 is Q, and Q is a positive even number. The winding unit 21 is deflected by a first angle in the first direction and a second angle in the second direction by the lead-out flat wire from the welding end of the stator core 1. The sum of the first angle and the second angle ranges from 360 / Q-5 to 360 / Q+5 degrees.

[0058] The flat wire motor stator can transform a 6-branch winding into a 3-branch winding by changing the torsion angle of the flat copper wire in the outermost area of the flat wire stator welding end. Then, only 4 copper bars are needed to realize the circuit connection of the three-branch winding stator, which reduces the welding difficulty and improves the production efficiency.

[0059] This embodiment also provides a wiring process for a three-phase flat wire stator winding, comprising the following steps:

[0060] S1: Inserting the two ends of the second flat wire 212 with a span of 8 located in the first and second layers of the flat wire winding 2 into the stator slots 11 respectively. Then, inserting the two ends of the first flat wire 211 with a span of 11 located in the first and second layers of the flat wire winding 2 into the stator slots 11 respectively. This completes the insertion of the first and second layers of the flat wire winding 2.

[0061] S2: Repeat S1 to sequentially arrange the 2k+1th layer and the 2k+2th layer of the flat wire winding 2 in the corresponding stator slots 11 of the stator core 1 until all the flat wire windings 2 are arranged in the stator slots 11;

[0062] S3: Twist the lead-out ends of the rectangular wires of each layer extending from the welded end of the stator core 1. Twist the rectangular wires of the 2k-1th layer and half of the guide portion of the 2nth layer of the rectangular wire winding 2 from the welded end in a clockwise direction. Then, twist the rectangular wires of the 2kth layer, the series connection portion of the 2nth layer, and the remaining half of the guide portion of the rectangular wire winding 2 from the welded end in a counterclockwise direction.

[0063] S4: Connect the twisted pins accordingly to complete the wiring of the three-phase flat wire stator winding.

[0064] First, insert the flat wire with a span of 8 into the corresponding stator slots of the first and second layers, and then insert the flat wire with a span of 11 into the corresponding stator slots to complete the wire insertion of the first and second layers. Then, set all the flat wire windings in the stator slots in sequence to complete the wire insertion. After that, twist and weld the lead-out ends of the flat wire windings at the welding ends, making the wiring process of the motor flat wire windings simpler and improving the production efficiency.

[0065] This embodiment also provides a motor stator, including the above-mentioned three-phase flat wire stator winding.

[0066] Combined with the above implementation manners, this embodiment also provides a more specific implementation manner, including:

[0067] As Figure 1 shown, this embodiment provides a flat wire motor stator, including a stator core 1, a flat wire winding 2, and a busbar copper row 3. As Figure 2 , 3 , 4 shown, the flat wire winding 2 is jointly composed of a number of Upin-1-2-11 flat copper wires 201, Upin-1-2-8 flat copper wires 202, Upin-3-4-11 flat copper wires 203, Upin-3-4-8 flat copper wires 204, Upin-5-6-11 flat copper wires 205, Upin-5-6-8 flat copper wires 206, Upin-7-8-11 flat copper wires 207, and Upin-7-8-8 flat copper wires 208. The busbar copper row 3 is composed of a U-phase copper row 301, a V-phase copper row 302, a W-phase copper row 303, and a neutral line copper row 304.

[0068] The 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; the 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. Due to the obvious regularity of the line type distribution, the wire insertion process of the flat wire motor stator is reduced, and the risk of incorrect operation is reduced.

[0069] The sizes of the wire coils at both ends of the flat wire stator do not exceed the inner diameter of the stator core, resulting in that the rotor matching the stator can only be assembled in one direction, restricting the flexibility of the application of the flat wire stator.

[0070] In this embodiment, taking n = 4, the number of slots S of the stator core 1 = 54, and the number of pole pairs Q = 6 as an example. The three phases of U, V, and W are balanced, and each branch of U1, U2, U3, V1, V2, V3, W1, W2, and W3 is balanced, which can avoid the influence of circulating current;

[0071] The specific flat wire distribution structure is:

[0072] As shown Figure 6 in the figure, 36 flat copper wires of Upin-1-2-8 are used. The two ends of the flat copper wires are respectively inserted into the s2 iron core slots of the L2 layer and the s10 iron core slots of the L1 layer, the s3 iron core slots of the L2 layer and the s11 iron core slots of the L1 layer, the s5 iron core slots of the L2 layer and the s13 iron core slots of the L1 layer, the s6 iron core slots of the L2 layer and the s14 iron core slots of the L1 layer, the s8 iron core slots of the L2 layer and the s16 iron core slots of the L1 layer, the s9 iron core slots of the L2 layer and the s17 iron core slots of the L1 layer, the s11 iron core slots of the L2 layer and the s19 iron core slots of the L1 layer, the s12 iron core slots of the L2 layer and the s20 iron core slots of the L1 layer, the s14 iron core slots of the L2 layer and the s22 iron core slots of the L1 layer, the s15 iron core slots of the L2 layer and the s23 iron core slots of the L1 layer, the s17 iron core slots of the L2 layer and the s25 iron core slots of the L1 layer, the s18 iron core slots of the L2 layer and the s26 iron core slots of the L1 layer, the s20 iron core slots of the L2 layer and the s28 iron core slots of the L1 layer, the s21 iron core slots of the L2 layer and the s29 iron core slots of the L1 layer, the s23 iron core slots of the L2 layer and the s31 iron core slots of the L1 layer, the s24 iron core slots of the L2 layer and the s32 iron core slots of the L1 layer, the s26 iron core slots of the L2 layer and the s34 iron core slots of the L1 layer, the s27 iron core slots of the L2 layer and the s35 iron core slots of the L1 layer, the s29 iron core slots of the L2 layer and the s37 iron core slots of the L1 layer, the s30 iron core slots of the L2 layer and the s38 iron core slots of the L1 layer, the s32 iron core slots of the L2 layer and the s40 iron core slots of the L1 layer, the s33 iron core slots of the L2 layer and the s41 iron core slots of the L1 layer, the s35 iron core slots of the L2 layer and the s43 iron core slots of the L1 layer, the s36 iron core slots of the L2 layer and the s44 iron core slots of the L1 layer, the s38 iron core slots of the L2 layer and the s46 iron core slots of the L1 layer, the s39 iron core slots of the L2 layer and the s47 iron core slots of the L1 layer, the s41 iron core slots of the L2 layer and the s49 iron core slots of the L1 layer, the s42 iron core slots of the L2 layer and the s50 iron core slots of the L1 layer, the s44 iron core slots of the L2 layer and the s52 iron core slots of the L1 layer, the s45 iron core slots of the L2 layer and the s53 iron core slots of the L1 layer, the s47 iron core slots of the L2 layer and the s1 iron core slots of the L1 layer, the s48 iron core slots of the L2 layer and the s2 iron core slots of the L1 layer, the s50 iron core slots of the L2 layer and the s4 iron core slots of the L1 layer, the s51 iron core slots of the L2 layer and the s5 iron core slots of the L1 layer, the s53 iron core slots of the L2 layer and the s6 iron core slots of the L1 layer, the s54 iron core slots of the L2 layer and the s7 iron core slots of the L1 layer.

[0073] Use 18 flat copper wires of Upin-1-2-11. Insert the two ends of the flat copper wires into the s1 iron core slots of the L2 layer and the s12 iron core slots of the L1 layer, the s4 iron core slots of the L2 layer and the s15 iron core slots of the L1 layer, the s7 iron core slots of the L2 layer and the s18 iron core slots of the L1 layer, the s10 iron core slots of the L2 layer and the s21 iron core slots of the L1 layer, the s13 iron core slots of the L2 layer and the s24 iron core slots of the L1 layer, the s16 iron core slots of the L2 layer and the s27 iron core slots of the L1 layer, the s19 iron core slots of the L2 layer and the s30 iron core slots of the L1 layer, the s22 iron core slots of the L2 layer and the s33 iron core slots of the L1 layer, the s25 iron core slots of the L2 layer and the s36 iron core slots of the L1 layer, the s28 iron core slots of the L2 layer and the s39 iron core slots of the L1 layer, the s31 iron core slots of the L2 layer and the s42 iron core slots of the L1 layer, the s34 iron core slots of the L2 layer and the s45 iron core slots of the L1 layer, the s37 iron core slots of the L2 layer and the s48 iron core slots of the L1 layer, the s40 iron core slots of the L2 layer and the s51 iron core slots of the L1 layer, the s43 iron core slots of the L2 layer and the s54 iron core slots of the L1 layer, the s46 iron core slots of the L2 layer and the s3 iron core slots of the L1 layer, the s49 iron core slots of the L2 layer and the s6 iron core slots of the L1 layer, the s52 iron core slots of the L2 layer and the s9 iron core slots of the L1 layer respectively.

[0074] So far, the setting of the first layer and the second layer of the flat wire winding 2 is completed.

[0075] Such as Figure 7As shown, 36 flat copper wires of Upin-3-4-8 are used. The two ends of the flat copper wires are respectively inserted into the s2 iron core slots of the L4 layer and the s10 iron core slots of the L3 layer, the s3 iron core slots of the L4 layer and the s11 iron core slots of the L3 layer, the s5 iron core slots of the L4 layer and the s13 iron core slots of the L3 layer, the s6 iron core slots of the L4 layer and the s14 iron core slots of the L3 layer, the s8 iron core slots of the L4 layer and the s16 iron core slots of the L3 layer, the s9 iron core slots of the L4 layer and the s17 iron core slots of the L3 layer, the s11 iron core slots of the L4 layer and the s19 iron core slots of the L3 layer, the s12 iron core slots of the L4 layer and the s20 iron core slots of the L3 layer, the s14 iron core slots of the L4 layer and the s22 iron core slots of the L3 layer, the s15 iron core slots of the L4 layer and the s23 iron core slots of the L3 layer, the s17 iron core slots of the L4 layer and the s25 iron core slots of the L3 layer, the s18 iron core slots of the L4 layer and the s26 iron core slots of the L3 layer, the s20 iron core slots of the L4 layer and the s28 iron core slots of the L3 layer, the s21 iron core slots of the L4 layer and the s29 iron core slots of the L3 layer, the s23 iron core slots of the L4 layer and the s31 iron core slots of the L3 layer, the s24 iron core slots of the L4 layer and the s32 iron core slots of the L3 layer, the s26 iron core slots of the L4 layer and the s34 iron core slots of the L3 layer, the s27 iron core slots of the L4 layer and the s35 iron core slots of the L3 layer, the s29 iron core slots of the L4 layer and the s37 iron core slots of the L3 layer, the s30 iron core slots of the L4 layer and the s38 iron core slots of the L3 layer, the s32 iron core slots of the L4 layer and the s40 iron core slots of the L3 layer, the s33 iron core slots of the L4 layer and the s41 iron core slots of the L3 layer, the s35 iron core slots of the L4 layer and the s43 iron core slots of the L3 layer, the s36 iron core slots of the L4 layer and the s44 iron core slots of the L3 layer, the s38 iron core slots of the L4 layer and the s46 iron core slots of the L3 layer, the s39 iron core slots of the L4 layer and the s47 iron core slots of the L3 layer, the s41 iron core slots of the L4 layer and the s49 iron core slots of the L3 layer, the s42 iron core slots of the L4 layer and the s50 iron core slots of the L3 layer, the s44 iron core slots of the L4 layer and the s52 iron core slots of the L3 layer, the s45 iron core slots of the L4 layer and the s53 iron core slots of the L3 layer, the s47 iron core slots of the L4 layer and the s1 iron core slots of the L3 layer, the s_{48} iron core slots of the L4 layer and the s2 iron core slots of the L3 layer, the s50 iron core slots of the L4 layer and the s4 iron core slots of the L3 layer, the s51 iron core slots of the L4 layer and the s5 iron core slots of the L3 layer, the s53 iron core slots of the L4 layer and the s6 iron core slots of the L3 layer, the s54 iron core slots of the L4 layer and the s7 iron core slots of the L3 layer.

[0076] Use 18 flat copper wires of Upin-3-4-11. Insert the two ends of the flat copper wires into the s1 iron core slots of layer L4 and the s12 iron core slots of layer L3, the s4 iron core slots of layer L4 and the s15 iron core slots of layer L3, the s7 iron core slots of layer L4 and the s18 iron core slots of layer L3, the s10 iron core slots of layer L4 and the s21 iron core slots of layer L3, the s13 iron core slots of layer L4 and the s24 iron core slots of layer L3, the s16 iron core slots of layer L4 and the s27 iron core slots of layer L3, the s19 iron core slots of layer L4 and the s30 iron core slots of layer L3, the s22 iron core slots of layer L4 and the s33 iron core slots of layer L3, the s25 iron core slots of layer L4 and the s36 iron core slots of layer L3, the s28 iron core slots of layer L4 and the s39 iron core slots of layer L3, the s31 iron core slots of layer L4 and the s42 iron core slots of layer L3, the s34 iron core slots of layer L4 and the s45 iron core slots of layer L3, the s37 iron core slots of layer L4 and the s48 iron core slots of layer L3, the s40 iron core slots of layer L4 and the s51 iron core slots of layer L3, the s43 iron core slots of layer L4 and the s54 iron core slots of layer L3, the s46 iron core slots of layer L4 and the s3 iron core slots of layer L3, the s49 iron core slots of layer L4 and the s6 iron core slots of layer L3, and the s52 iron core slots of layer L4 and the s9 iron core slots of layer L3 respectively in the stator iron core.

[0077] So far, the setting of the 3rd and 4th layers of the flat wire winding 2 is completed.

[0078] Such as Figure 8As shown, 36 flat copper wires of Upin-5-6-8 are used. The two ends of the flat copper wires are respectively inserted into the s2 iron core slots of the L6 layer and the s10 iron core slots of the L5 layer, the s3 iron core slots of the L6 layer and the s11 iron core slots of the L5 layer, the s5 iron core slots of the L6 layer and the s13 iron core slots of the L5 layer, the s6 iron core slots of the L6 layer and the s14 iron core slots of the L5 layer, the s8 iron core slots of the L6 layer and the s16 iron core slots of the L5 layer, the s9 iron core slots of the L6 layer and the s17 iron core slots of the L5 layer, the s11 iron core slots of the L6 layer and the s19 iron core slots of the L5 layer, the s12 iron core slots of the L6 layer and the s20 iron core slots of the L5 layer, the s14 iron core slots of the L6 layer and the s22 iron core slots of the L5 layer, the s15 iron core slots of the L6 layer and the s23 iron core slots of the L5 layer, the s17 iron core slots of the L6 layer and the s25 iron core slots of the L5 layer, the s18 iron core slots of the L6 layer and the s26 iron core slots of the L5 layer, the s20 iron core slots of the L6 layer and the s28 iron core slots of the L5 layer, the s21 iron core slots of the L6 layer and the s29 iron core slots of the L5 layer, the s23 iron core slots of the L6 layer and the s31 iron core slots of the L5 layer, the s24 iron core slots of the L6 layer and the s32 iron core slots of the L5 layer, the s26 iron core slots of the L6 layer and the s34 iron core slots of the L5 layer, the s27 iron core slots of the L6 layer and the s35 iron core slots of the L5 layer, the s29 iron core slots of the L6 layer and the s37 iron core slots of the L5 layer, the s30 iron core slots of the L6 layer and the s38 iron core slots of the L5 layer, the s32 iron core slots of the L6 layer and the s40 iron core slots of the L5 layer, the s33 iron core slots of the L6 layer and the s41 iron core slots of the L5 layer, the s35 iron core slots of the L6 layer and the s43 iron core slots of the L5 layer, the s36 iron core slots of the L6 layer and the s44 iron core slots of the L5 layer, the s38 iron core slots of the L6 layer and the s46 iron core slots of the L5 layer, the s39 iron core slots of the L6 layer and the s47 iron core slots of the L5 layer, the s41 iron core slots of the L6 layer and the s49 iron core slots of the L5 layer, the s42 iron core slots of the L6 layer and the s50 iron core slots of the L5 layer, the s44 iron core slots of the L6 layer and the s52 iron core slots of the L5 layer, the s45 iron core slots of the L6 layer and the s53 iron core slots of the L5 layer, the s47 iron core slots of the L6 layer and the s1 iron core slots of the L5 layer, the s48 iron core slots of the L6 layer and the s2 iron core slots of the L5 layer, the s50 iron core slots of the L6 layer and the s4 iron core slots of the L5 layer, the s51 iron core slots of the L6 layer and the s5 iron core slots of the L5 layer, the s53 iron core slots of the L6 layer and the s6 iron core slots of the L5 layer, the s54 iron core slots of the L6 layer and the s7 iron core slots of the L5 layer.

[0079] Use 18 flat copper wires of Upin - 5 - 6 - 11, and insert the two ends of the flat copper wires into the s1 iron core slots of the L6 layer and the s12 iron core slots of the L5 layer, the s4 iron core slots of the L6 layer and the s15 iron core slots of the L5 layer, the s7 iron core slots of the L6 layer and the s18 iron core slots of the L5 layer, the s10 iron core slots of the L6 layer and the s21 iron core slots of the L5 layer, the s13 iron core slots of the L6 layer and the s24 iron core slots of the L5 layer, the s16 iron core slots of the L6 layer and the s27 iron core slots of the L5 layer, the s19 iron core slots of the L6 layer and the s30 iron core slots of the L5 layer, the s22 iron core slots of the L6 layer and the s33 iron core slots of the L5 layer, the s25 iron core slots of the L6 layer and the s36 iron core slots of the L5 layer, the s28 iron core slots of the L6 layer and the s39 iron core slots of the L5 layer, the s31 iron core slots of the L6 layer and the s42 iron core slots of the L5 layer, the s34 iron core slots of the L6 layer and the s45 iron core slots of the L5 layer, the s37 iron core slots of the L6 layer and the s48 iron core slots of the L5 layer, the s40 iron core slots of the L6 layer and the s51 iron core slots of the L5 layer, the s43 iron core slots of the L6 layer and the s54 iron core slots of the L5 layer, the s46 iron core slots of the L6 layer and the s3 iron core slots of the L5 layer, the s49 iron core slots of the L6 layer and the s6 iron core slots of the L5 layer, the s52 iron core slots of the L6 layer and the s9 iron core slots of the L5 layer respectively.

[0080] So far, the setting of the 5th and 6th layers of the flat wire winding 2 is completed.

[0081] Such as Figure 9As shown, 36 flat copper wires of Upin-7-8-8 are used. The two ends of the flat copper wires are respectively inserted into the s2 iron core slots of the L8 layer and the s10 iron core slots of the L7 layer, the s3 iron core slots of the L8 layer and the s11 iron core slots of the L7 layer, the s5 iron core slots of the L8 layer and the s13 iron core slots of the L7 layer, the s6 iron core slots of the L8 layer and the s14 iron core slots of the L7 layer, the s8 iron core slots of the L8 layer and the s16 iron core slots of the L7 layer, the s9 iron core slots of the L8 layer and the s17 iron core slots of the L7 layer, the s11 iron core slots of the L8 layer and the s19 iron core slots of the L7 layer, the s12 iron core slots of the L8 layer and the s20 iron core slots of the L7 layer, the s14 iron core slots of the L8 layer and the s22 iron core slots of the L7 layer, the s15 iron core slots of the L8 layer and the s23 iron core slots of the L7 layer, the s17 iron core slots of the L8 layer and the s25 iron core slots of the L7 layer, the s18 iron core slots of the L8 layer and the s26 iron core slots of the L7 layer, the s20 iron core slots of the L8 layer and the s28 iron core slots of the L7 layer, the s21 iron core slots of the L8 layer and the s29 iron core slots of the L7 layer, the s23 iron core slots of the L8 layer and the s31 iron core slots of the L7 layer, the s24 iron core slots of the L8 layer and the s32 iron core slots of the L7 layer, the s26 iron core slots of the L8 layer and the s34 iron core slots of the L7 layer, the s27 iron core slots of the L8 layer and the s35 iron core slots of the L7 layer, the s29 iron core slots of the L8 layer and the s37 iron core slots of the L7 layer, the s30 iron core slots of the L8 layer and the s38 iron core slots of the L7 layer, the s32 iron core slots of the L8 layer and the s40 iron core slots of the L7 layer, the s33 iron core slots of the L8 layer and the s41 iron core slots of the L7 layer, the s35 iron core slots of the L8 layer and the s43 iron core slots of the L7 layer, the s36 iron core slots of the L8 layer and the s44 iron core slots of the L7 layer, the s38 iron core slots of the L8 layer and the s46 iron core slots of the L7 layer, the s39 iron core slots of the L8 layer and the s47 iron core slots of the L7 layer, the s41 iron core slots of the L8 layer and the s49 iron core slots of the L7 layer, the s42 iron core slots of the L8 layer and the s50 iron core slots of the L7 layer, the s44 iron core slots of the L8 layer and the s52 iron core slots of the L7 layer, the s45 iron core slots of the L8 layer and the s53 iron core slots of the L7 layer, the s47 iron core slots of the L8 layer and the s1 iron core slots of the L7 layer, the s48 iron core slots of the L8 layer and the s2 iron core slots of the L7 layer, the s50 iron core slots of the L8 layer and the s4 iron core slots of the L7 layer, the s51 iron core slots of the L8 layer and the s5 iron core slots of the L7 layer, the s53 iron core slots of the L8 layer and the s6 iron core slots of the L7 layer, the s54 iron core slots of the L8 layer and the s7 iron core slots of the L7 layer.

[0082] Use 18 flat copper wires of Upin-7-8-11. Insert the two ends of the flat copper wires into the s1 iron core slots of layer L8 and the s12 iron core slots of layer L7, the s4 iron core slots of layer L8 and the s15 iron core slots of layer L7, the s7 iron core slots of layer L8 and the s18 iron core slots of layer L7, the s10 iron core slots of layer L8 and the s21 iron core slots of layer L7, the s13 iron core slots of layer L8 and the s24 iron core slots of layer L7, the s16 iron core slots of layer L8 and the s27 iron core slots of layer L7, the s19 iron core slots of layer L8 and the s30 iron core slots of layer L7, the s22 iron core slots of layer L8 and the s33 iron core slots of layer L7, the s25 iron core slots of layer L8 and the s36 iron core slots of layer L7, the s28 iron core slots of layer L8 and the s39 iron core slots of layer L7, the s31 iron core slots of layer L8 and the s42 iron core slots of layer L7, the s34 iron core slots of layer L8 and the s45 iron core slots of layer L7, the s37 iron core slots of layer L8 and the s48 iron core slots of layer L7, the s40 iron core slots of layer L8 and the s51 iron core slots of layer L7, the s43 iron core slots of layer L8 and the s54 iron core slots of layer L7, the s46 iron core slots of layer L8 and the s3 iron core slots of layer L7, the s49 iron core slots of layer L8 and the s6 iron core slots of layer L7, the s52 iron core slots of layer L8 and the s9 iron core slots of layer L7 of the stator iron core respectively.

[0083] So far, the settings of the 7th and 8th layers of the flat wire winding 2 are completed.

[0084] After twisting the flat copper wires of each layer extending from the welding end of the stator iron core. The welding ends of layers L1, L3, L5 and L7 are twisted in the direction of increasing stator slot number, and the welding ends of layers L2, L4 and L6 are twisted in the direction of decreasing stator slot number. Among them, the s7, s8, s9, s10, s11, s12, s13, s14 and s15 iron core slots of layer L8 are twisted in the direction of increasing stator slot number, and the lead wires of the other slots in layer L8 are twisted in the direction of decreasing stator slot number.

[0085] The flat copper wires of the s52, s53, s54, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15 iron core slots in layer L1 are connected to the copper busbar. The flat copper wires of the s52, s53, s54, s4, s5, s6, s10, s11, s12 iron core slots in layer L1 are connected to the neutral copper busbar 304; the flat copper wires of the s1, s2, s3 iron core slots are connected to the U-phase copper busbar 301; the flat copper wires of the s7, s8, s9 iron core slots are connected to the V-phase copper busbar 302; the flat copper wires of the s13, s14, s15 iron core slots are connected to the W-phase copper busbar 303.

[0086] The flat copper wire in slot s51 of layer L1 is connected to the lead wire in slot s6 of layer L2. The flat copper wire in slot s50 of layer L1 is connected to the lead wire in slot s5 of layer L2. The flat copper wire in slot s49 of layer L1 is connected to the lead wire in slot s4 of layer L2. The flat copper wire in slot s48 of layer L1 is connected to the lead wire in slot s3 of layer L2. The flat copper wire in slot s47 of layer L1 is connected to the lead wire in slot s2 of layer L2. The flat copper wire in slot s46 of layer L1 is connected to the lead wire in slot s1 of layer L2. The flat copper wire in slot s45 of layer L1 is connected to the lead wire in slot s54 of layer L2. The flat copper wire in slot s44 of layer L1 is connected to the lead wire in slot s53 of layer L2. The flat copper wire in slot s43 of layer L1 is connected to the lead wire in slot s52 of layer L2. The flat copper wire in slot s42 of layer L1 is connected to the lead wire in slot s51 of layer L2. The flat copper wire in slot s41 of layer L1 is connected to the lead wire in slot s50 of layer L2. The flat copper wire in slot s40 of layer L1 is connected to the lead wire in slot s49 of layer L2. The flat copper wire in slot s39 of layer L1 is connected to the lead wire in slot s48 of layer L2. The flat copper wire in slot s38 of layer L1 is connected to the lead wire in slot s47 of layer L2. The flat copper wire in slot s37 of layer L1 is connected to the lead wire in slot s46 of layer L2. The flat copper wire in slot s36 of layer L1 is connected to the lead wire in slot s45 of layer L2. The flat copper wire in slot s35 of layer L1 is connected to the lead wire in slot s44 of layer L2. The flat copper wire in slot s34 of layer L1 is connected to the lead wire in slot s43 of layer L2. The flat copper wire in slot s33 of layer L1 is connected to the lead wire in slot s42 of layer L2. The flat copper wire in slot s32 of layer L1 is connected to the lead wire in slot s41 of layer L2. The flat copper wire in slot s31 of layer L1 is connected to the lead wire in slot s40 of layer L2. The flat copper wire in slot s30 of layer L1 is connected to the lead wire in slot s39 of layer L2. The flat copper wire in slot s29 of layer L1 is connected to the lead wire in slot s38 of layer L2. The flat copper wire in slot s28 of layer L1 is connected to the lead wire in slot s37 of layer L2. The flat copper wire in slot s27 of layer L1 is connected to the lead wire in slot s36 of layer L2. The flat copper wire in slot s26 of layer L1 is connected to the lead wire in slot s35 of layer L2. The flat copper wire in slot s25 of layer L1 is connected to the lead wire in slot s34 of layer L2. The flat copper wire in slot s24 of layer L1 is connected to the lead wire in slot s33 of layer L2. The flat copper wire in slot s23 of layer L1 is connected to the lead wire in slot s32 of layer L2. The flat copper wire in slot s22 of layer L1 is connected to the lead wire in slot s31 of layer L2. The flat copper wire in slot s21 of layer L1 is connected to the lead wire in slot s30 of layer L2. The flat copper wire in slot s20 of layer L1 is connected to the lead wire in slot s29 of layer L2. The flat copper wire in slot s19 of layer L1 is connected to the lead wire in slot s28 of layer L2. The flat copper wire in slot s18 of layer L1 is connected to the lead wire in slot s27 of layer L2. The flat copper wire in slot s17 of layer L1 is connected to the lead wire in slot s26 of layer L2. The flat copper wire in slot s16 of layer L1 is connected to the lead wire in slot s25 of layer L2.

[0087] The flat copper wire in slot s24 of layer L2 is connected to the lead wire in slot s15 of layer L3. The flat copper wire in slot s23 of layer L2 is connected to the lead wire in slot s14 of layer L3. The flat copper wire in slot s22 of layer L2 is connected to the lead wire in slot s13 of layer L3. The flat copper wire in slot s21 of layer L2 is connected to the lead wire in slot s12 of layer L3. The flat copper wire in slot s20 of layer L2 is connected to the lead wire in slot s11 of layer L3. The flat copper wire in slot s19 of layer L2 is connected to the lead wire in slot s10 of layer L3. The flat copper wire in slot s18 of layer L2 is connected to the lead wire in slot s9 of layer L3. The flat copper wire in slot s17 of layer L2 is connected to the lead wire in slot s8 of layer L3. The flat copper wire in slot s16 of layer L2 is connected to the lead wire in slot s7 of layer L3. The flat copper wire in slot s15 of layer L2 is connected to the lead wire in slot s6 of layer L3. The flat copper wire in slot s14 of layer L2 is connected to the lead wire in slot s5 of layer L3. The flat copper wire in slot s13 of layer L2 is connected to the lead wire in slot s4 of layer L3. The flat copper wire in slot s12 of layer L2 is connected to the lead wire in slot s3 of layer L3. The flat copper wire in slot s11 of layer L2 is connected to the lead wire in slot s2 of layer L3. The flat copper wire in slot s10 of layer L2 is connected to the lead wire in slot s1 of layer L3. The flat copper wire in slot s9 of layer L2 is connected to the lead wire in slot s54 of layer L3. The flat copper wire in slot s8 of layer L2 is connected to the lead wire in slot s53 of layer L3. The flat copper wire in slot s7 of layer L2 is connected to the lead wire in slot s52 of layer L3.

[0088] The flat copper wire in slot s51 of layer L3 is connected to the lead wire in slot s6 of layer L4. The flat copper wire in slot s50 of layer L3 is connected to the lead wire in slot s5 of layer L4. The flat copper wire in slot s49 of layer L3 is connected to the lead wire in slot s4 of layer L4. The flat copper wire in slot s48 of layer L3 is connected to the lead wire in slot s3 of layer L4. The flat copper wire in slot s47 of layer L3 is connected to the lead wire in slot s2 of layer L4. The flat copper wire in slot s46 of layer L3 is connected to the lead wire in slot s1 of layer L4. The flat copper wire in slot s45 of layer L3 is connected to the lead wire in slot s54 of layer L4. The flat copper wire in slot s44 of layer L3 is connected to the lead wire in slot s53 of layer L4. The flat copper wire in slot s43 of layer L3 is connected to the lead wire in slot s52 of layer L4. The flat copper wire in slot s42 of layer L3 is connected to the lead wire in slot s51 of layer L4. The flat copper wire in slot s41 of layer L3 is connected to the lead wire in slot s50 of layer L4. The flat copper wire in slot s40 of layer L3 is connected to the lead wire in slot s49 of layer L4. The flat copper wire in slot s39 of layer L3 is connected to the lead wire in slot s48 of layer L4. The flat copper wire in slot s38 of layer L3 is connected to the lead wire in slot s47 of layer L4. The flat copper wire in slot s37 of layer L3 is connected to the lead wire in slot s46 of layer L4. The flat copper wire in slot s36 of layer L3 is connected to the lead wire in slot s45 of layer L4. The flat copper wire in slot s35 of layer L3 is connected to the lead wire in slot s44 of layer L4. The flat copper wire in slot s34 of layer L3 is connected to the lead wire in slot s43 of layer L4. The flat copper wire in slot s33 of layer L3 is connected to the lead wire in slot s42 of layer L4. The flat copper wire in slot s32 of layer L3 is connected to the lead wire in slot s41 of layer L4. The flat copper wire in slot s31 of layer L3 is connected to the lead wire in slot s40 of layer L4. The flat copper wire in slot s30 of layer L3 is connected to the lead wire in slot s39 of layer L4. The flat copper wire in slot s29 of layer L3 is connected to the lead wire in slot s38 of layer L4. The flat copper wire in slot s28 of layer L3 is connected to the lead wire in slot s37 of layer L4. The flat copper wire in slot s27 of layer L3 is connected to the lead wire in slot s36 of layer L4. The flat copper wire in slot s26 of layer L3 is connected to the lead wire in slot s35 of layer L4. The flat copper wire in slot s25 of layer L3 is connected to the lead wire in slot s34 of layer L4. The flat copper wire in slot s24 of layer L3 is connected to the lead wire in slot s33 of layer L4. The flat copper wire in slot s23 of layer L3 is connected to the lead wire in slot s32 of layer L4. The flat copper wire in slot s22 of layer L3 is connected to the lead wire in slot s31 of layer L4. The flat copper wire in slot s21 of layer L3 is connected to the lead wire in slot s30 of layer L4. The flat copper wire in slot s20 of layer L3 is connected to the lead wire in slot s29 of layer L4. The flat copper wire in slot s19 of layer L3 is connected to the lead wire in slot s28 of layer L4. The flat copper wire in slot s18 of layer L3 is connected to the lead wire in slot s27 of layer L4. The flat copper wire in slot s17 of layer L3 is connected to the lead wire in slot s26 of layer L4. The flat copper wire in slot s16 of layer L3 is connected to the lead wire in slot s25 of layer L4.

[0089] The flat copper wire in slot s24 of layer L4 is connected to the lead wire in slot s15 of layer L3. The flat copper wire in slot s23 of layer L4 is connected to the lead wire in slot s14 of layer L3. The flat copper wire in slot s22 of layer L4 is connected to the lead wire in slot s13 of layer L3. The flat copper wire in slot s21 of layer L4 is connected to the lead wire in slot s12 of layer L3. The flat copper wire in slot s20 of layer L4 is connected to the lead wire in slot s11 of layer L3. The flat copper wire in slot s19 of layer L4 is connected to the lead wire in slot s10 of layer L3. The flat copper wire in slot s18 of layer L4 is connected to the lead wire in slot s9 of layer L3. The flat copper wire in slot s17 of layer L4 is connected to the lead wire in slot s8 of layer L3. The flat copper wire in slot s16 of layer L4 is connected to the lead wire in slot s7 of layer L3. The flat copper wire in slot s15 of layer L4 is connected to the lead wire in slot s6 of layer L3. The flat copper wire in slot s14 of layer L4 is connected to the lead wire in slot s5 of layer L3. The flat copper wire in slot s13 of layer L4 is connected to the lead wire in slot s4 of layer L3. The flat copper wire in slot s12 of layer L4 is connected to the lead wire in slot s3 of layer L3. The flat copper wire in slot s11 of layer L4 is connected to the lead wire in slot s2 of layer L3. The flat copper wire in slot s10 of layer L4 is connected to the lead wire in slot s1 of layer L3. The flat copper wire in slot s9 of layer L4 is connected to the lead wire in slot s54 of layer L3. The flat copper wire in slot s8 of layer L4 is connected to the lead wire in slot s53 of layer L3. The flat copper wire in slot s7 of layer L4 is connected to the lead wire in slot s52 of layer L3.

[0090] The flat copper wire in slot s51 of layer L5 is connected to the lead wire in slot s6 of layer L6, the flat copper wire in slot s50 of layer L5 is connected to the lead wire in slot s5 of layer L6, the flat copper wire in slot s49 of layer L5 is connected to the lead wire in slot s4 of layer L6, the flat copper wire in slot s48 of layer L5 is connected to the lead wire in slot s3 of layer L6, the flat copper wire in slot s47 of layer L5 is connected to the lead wire in slot s2 of layer L6, the flat copper wire in slot s46 of layer L5 is connected to the lead wire in slot s1 of layer L6, the flat copper wire in slot s45 of layer L5 is connected to the lead wire in slot s54 of layer L6, the flat copper wire in slot s44 of layer L5 is connected to the lead wire in slot s53 of layer L6, the flat copper wire in slot s43 of layer L5 is connected to the lead wire in slot s52 of layer L6, the flat copper wire in slot s42 of layer L5 is connected to the lead wire in slot s51 of layer L6, the flat copper wire in slot s41 of layer L5 is connected to the lead wire in slot s50 of layer L6, the flat copper wire in slot s40 of layer L5 is connected to the lead wire in slot s49 of layer L6, the flat copper wire in slot s39 of layer L5 is connected to the lead wire in slot s48 of layer L6, the flat copper wire in slot s38 of layer L5 is connected to the lead wire in slot s47 of layer L6, the flat copper wire in slot s37 of layer L5 is connected to the lead wire in slot s46 of layer L6, the flat copper wire in slot s36 of layer L5 is connected to the lead wire in slot s45 of layer L6, the flat copper wire in slot s35 of layer L5 is connected to the lead wire in slot s44 of layer L6, the flat copper wire in slot s34 of layer L5 is connected to the lead wire in slot s43 of layer L6, the flat copper wire in slot s33 of layer L5 is connected to the lead wire in slot s42 of layer L6, the flat copper wire in slot s32 of layer L5 is connected to the lead wire in slot s41 of layer L6, the flat copper wire in slot s31 of layer L5 is connected to the lead wire in slot s40 of layer L6, the flat copper wire in slot s30 of layer L5 is connected to the lead wire in slot s39 of layer L6, the flat copper wire in slot s29 of layer L5 is connected to the lead wire in slot s38 of layer L6, the flat copper wire in slot s28 of layer L5 is connected to the lead wire in slot s37 of layer L6, the flat copper wire in slot s27 of layer L5 is connected to the lead wire in slot s36 of layer L6, the flat copper wire in slot s26 of layer L5 is connected to the lead wire in slot s35 of layer L6, the flat copper wire in slot s25 of layer L5 is connected to the lead wire in slot s34 of layer L6, the flat copper wire in slot s24 of layer L5 is connected to the lead wire in slot s33 of layer L6, the flat copper wire in slot s23 of layer L5 is connected to the lead wire in slot s32 of layer L6, the flat copper wire in slot s22 of layer L5 is connected to the lead wire in slot s31 of layer L6, the flat copper wire in slot s21 of layer L5 is connected to the lead wire in slot s30 of layer L6, the flat copper wire in slot s20 of layer L5 is connected to the lead wire in slot s29 of layer L6, the flat copper wire in slot s19 of layer L5 is connected to the lead wire in slot s28 of layer L6, the flat copper wire in slot s18 of layer L5 is connected to the lead wire in slot s27 of layer L6, the flat copper wire in slot s17 of layer L5 is connected to the lead wire in slot s26 of layer L6, the flat copper wire in slot s16 of layer L5 is connected to the lead wire in slot s25 of layer L6.

[0091] The flat copper wire in slot s24 of layer L6 is connected to the lead wire in slot s15 of layer L5. The flat copper wire in slot s23 of layer L6 is connected to the lead wire in slot s14 of layer L5. The flat copper wire in slot s22 of layer L6 is connected to the lead wire in slot s13 of layer L5. The flat copper wire in slot s21 of layer L6 is connected to the lead wire in slot s12 of layer L5. The flat copper wire in slot s20 of layer L6 is connected to the lead wire in slot s11 of layer L5. The flat copper wire in slot s19 of layer L6 is connected to the lead wire in slot s10 of layer L5. The flat copper wire in slot s18 of layer L6 is connected to the lead wire in slot s9 of layer L5. The flat copper wire in slot s17 of layer L6 is connected to the lead wire in slot s8 of layer L5. The flat copper wire in slot s16 of layer L6 is connected to the lead wire in slot s7 of layer L5. The flat copper wire in slot s15 of layer L6 is connected to the lead wire in slot s6 of layer L5. The flat copper wire in slot s14 of layer L6 is connected to the lead wire in slot s5 of layer L5. The flat copper wire in slot s13 of layer L6 is connected to the lead wire in slot s4 of layer L5. The flat copper wire in slot s12 of layer L6 is connected to the lead wire in slot s3 of layer L5. The flat copper wire in slot s11 of layer L6 is connected to the lead wire in slot s2 of layer L5. The flat copper wire in slot s10 of layer L6 is connected to the lead wire in slot s1 of layer L5. The flat copper wire in slot s9 of layer L6 is connected to the lead wire in slot s54 of layer L5. The flat copper wire in slot s8 of layer L6 is connected to the lead wire in slot s53 of layer L5. The flat copper wire in slot s7 of layer L6 is connected to the lead wire in slot s52 of layer L5.

[0092] The flat copper wire in slot s51 of layer L7 is connected to the lead wire in slot s6 of layer L8. The flat copper wire in slot s50 of layer L7 is connected to the lead wire in slot s5 of layer L8. The flat copper wire in slot s49 of layer L7 is connected to the lead wire in slot s4 of layer L8. The flat copper wire in slot s48 of layer L7 is connected to the lead wire in slot s3 of layer L8. The flat copper wire in slot s47 of layer L7 is connected to the lead wire in slot s2 of layer L8. The flat copper wire in slot s46 of layer L7 is connected to the lead wire in slot s1 of layer L8. The flat copper wire in slot s45 of layer L7 is connected to the lead wire in slot s54 of layer L8. The flat copper wire in slot s44 of layer L7 is connected to the lead wire in slot s53 of layer L8. The flat copper wire in slot s43 of layer L7 is connected to the lead wire in slot s52 of layer L8. The flat copper wire in slot s42 of layer L7 is connected to the lead wire in slot s51 of layer L8. The flat copper wire in slot s41 of layer L7 is connected to the lead wire in slot s50 of layer L8. The flat copper wire in slot s40 of layer L7 is connected to the lead wire in slot s49 of layer L8. The flat copper wire in slot s39 of layer L7 is connected to the lead wire in slot s48 of layer L8. The flat copper wire in slot s38 of layer L7 is connected to the lead wire in slot s47 of layer L8. The flat copper wire in slot s37 of layer L7 is connected to the lead wire in slot s46 of layer L8. The flat copper wire in slot s36 of layer L7 is connected to the lead wire in slot s45 of layer L8. The flat copper wire in slot s35 of layer L7 is connected to the lead wire in slot s44 of layer L8. The flat copper wire in slot s34 of layer L7 is connected to the lead wire in slot s43 of layer L8. The flat copper wire in slot s33 of layer L7 is connected to the lead wire in slot s42 of layer L8. The flat copper wire in slot s32 of layer L7 is connected to the lead wire in slot s41 of layer L8. The flat copper wire in slot s31 of layer L7 is connected to the lead wire in slot s40 of layer L8. The flat copper wire in slot s30 of layer L7 is connected to the lead wire in slot s39 of layer L8. The flat copper wire in slot s29 of layer L7 is connected to the lead wire in slot s38 of layer L8. The flat copper wire in slot s28 of layer L7 is connected to the lead wire in slot s37 of layer L8. The flat copper wire in slot s27 of layer L7 is connected to the lead wire in slot s36 of layer L8. The flat copper wire in slot s26 of layer L7 is connected to the lead wire in slot s35 of layer L8. The flat copper wire in slot s25 of layer L7 is connected to the lead wire in slot s34 of layer L8. The flat copper wire in slot s24 of layer L7 is connected to the lead wire in slot s33 of layer L8. The flat copper wire in slot s23 of layer L7 is connected to the lead wire in slot s32 of layer L8. The flat copper wire in slot s22 of layer L7 is connected to the lead wire in slot s31 of layer L8. The flat copper wire in slot s21 of layer L7 is connected to the lead wire in slot s30 of layer L8. The flat copper wire in slot s20 of layer L7 is connected to the lead wire in slot s29 of layer L8. The flat copper wire in slot s19 of layer L7 is connected to the lead wire in slot s28 of layer L8. The flat copper wire in slot s18 of layer L7 is connected to the lead wire in slot s27 of layer L8. The flat copper wire in slot s17 of layer L7 is connected to the lead wire in slot s26 of layer L8. The flat copper wire in slot s16 of layer L7 is connected to the lead wire in slot s25 of layer L8.

[0093] The flat copper wire in slot s24 of layer L8 is connected to the lead wire in slot s15 of layer L8, the flat copper wire in slot s23 of layer L8 is connected to the lead wire in slot s14 of layer L8, the flat copper wire in slot s22 of layer L8 is connected to the lead wire in slot s13 of layer L8, the flat copper wire in slot s21 of layer L8 is connected to the lead wire in slot s12 of layer L8, the flat copper wire in slot s20 of layer L8 is connected to the lead wire in slot s11 of layer L8, the flat copper wire in slot s19 of layer L8 is connected to the lead wire in slot s10 of layer L8, the flat copper wire in slot s18 of layer L8 is connected to the lead wire in slot s9 of layer L8, the flat copper wire in slot s17 of layer L8 is connected to the lead wire in slot s8 of layer L8, and the flat copper wire in slot s16 of layer L8 is connected to the lead wire in slot s7 of layer L8.

[0094] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning, or limited experiments based on the concept of the present invention on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A three-phase flat wire stator winding, comprising a stator core (1) and a flat wire winding (2). A plurality of stator slots (11) are provided on the stator core (1). The flat wire winding (2) passes through the stator slots (11) and is led out from the welding end of the stator core (1), characterized in that, The flat wire winding (2) is radially arranged in 2n layers along the stator slots (11), where n≥1 and n is a natural number; The flat wire winding (2) includes a plurality of U-shaped winding units (21). One end of the winding unit (21) is located in the (2k - 1)-th layer, and the other end is located in the 2k-th layer. The winding unit (21) includes a first flat wire (211) and two second flat wires (212) arranged side by side continuously. The second flat wires (212) are arranged crosswise with respect to the first flat wire (211); The flat wire winding (2) includes a current guiding part and a series connection part. Half of the current guiding part of the 2n-th layer led out from the welding end of the flat wire winding (2) and the (2k - 1)-th layer deflect in the first direction. The series connection part of the 2n-th layer led out from the welding end of the flat wire winding (2), the remaining half of the current guiding part, and the 2k-th layer deflect in the second direction. The (2k - 1)-th layer led out from the welding end of the flat wire winding (2) is connected to the 2k-th layer through the series connection part. The 2k-th layer led out from the welding end of the flat wire winding (2) is connected to the (2k + 1)-th layer through the current guiding part, where k≥1 and k<n, and k is a natural number.

2. The three-phase flat wire stator winding according to claim 1, wherein The flat wire winding is a three-phase winding. Two adjacent winding units (21) in the circumferential direction of the flat wire winding (2) form the phase structure of the three-phase winding. The phase structures belonging to the same phase in the circumferential direction of the flat wire winding (2) are connected through the series connection part. The phase structures belonging to the same phase in the axial direction of the flat wire winding (2) are connected through the current guiding part.

3. A three-phase flat wire stator winding according to claim 2, characterized in that, The stator winding further includes a U-phase copper bar, a V-phase copper bar, a W-phase copper bar, and a neutral line copper bar. The current guiding part of the first layer led out from the welding end of the stator core (1) of the flat wire winding (2) includes 3 continuous phase structures. One winding unit (21) of each phase structure is respectively connected to the U-phase copper bar, the V-phase copper bar, and the W-phase copper bar. The other winding unit (21) of each phase structure is connected to the neutral line copper bar.

4. A three-phase flat wire stator winding according to claim 1, wherein, The span of the first flat wire (211) is 11, and the span of the second flat wire (212) is 8.

5. A three-phase flat wire stator winding according to claim 1, characterized in that, The first direction is the clockwise direction facing the welding end of the stator core (1), and the second direction is the counterclockwise direction facing the welding end of the stator core (1).

6. A three-phase flat wire stator winding according to claim 1, characterized in that, The current guiding part of the 2n-th layer led out from the welding end of the stator core (1) of the flat wire winding (2) includes 6 continuously arranged winding units (21). Among them, 3 continuous winding units (21) deflect in the first direction, and the remaining 3 continuous winding units (21) deflect in the second direction.

7. A three-phase flat wire stator winding according to claim 1, wherein The series connection part is formed by welding flat wires that deflect in opposite directions and are led out from the welding end of the stator core (1) of the winding units (21) of the same phase in the same two layers of the flat wire winding (2).

8. A three-phase flat wire stator winding according to claim 1, characterized in that, The number of poles of the stator core (1) is Q, and Q is a positive even number. The flat wire led out from the welding end of the stator core (1) of the winding unit (21) deflects by a first angle in the first direction and by a second angle in the second direction. The sum of the first angle and the second angle ranges from 360 / Q - 5 to 360 / Q + 5 degrees.

9. A wiring process for a three-phase flat wire stator winding according to any one of claims 1-8, characterized in that, Including the following steps: S1: Insert the two ends of the second flat wire (212) with a span of 8 in the 1st and 2nd layers of the flat wire winding (2) into the stator slots (11) respectively, and then insert the two ends of the first flat wire (211) with a span of 11 in the 1st and 2nd layers of the flat wire winding (2) into the stator slots (11) respectively, thus completing the wire insertion for the 1st and 2nd layers of the flat wire winding (2). S2: Repeat S1, and successively arrange the (2k + 1)-th layer and the (2k + 2)-th layer of the flat wire winding (2) in the corresponding stator slots (11) of the stator core (1) until the entire flat wire winding (2) is arranged in the stator slots (11). S3: Perform a twisting process on the lead-out ends of the flat wires of each layer extending from the welding end of the stator core (1). Twist the flat wire of the (2k - 1)-th layer led out from the welding end of the flat wire winding (2) and half of the current-carrying part of the 2n-th layer in the clockwise direction, and then twist the flat wire of the 2k-th layer led out from the welding end of the flat wire winding (2), the series part of the 2n-th layer, and the remaining half of the current-carrying part in the counterclockwise direction. S4: Connect the twisted pins correspondingly to complete the wiring of the three-phase flat wire stator winding.

10. A motor stator, characterized in that, Comprising a three-phase flat wire stator winding according to any one of claims 1 - 8.

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