A flat wire motor stator and motor

Abstract

This utility model discloses a flat wire motor stator, including a stator core and stator windings. The stator core has a ring-shaped structure, and multiple stator slots are provided on the inner sidewall of the stator core. All the stator slots are evenly distributed along the circumferential inner sidewall of the stator core. This utility model can reduce the voltage difference between branches by balancing the number and span of the hairpin wires in each branch, thereby reducing the probability of circulating current and avoiding affecting the motor's working efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a flat wire motor stator and motor. Background Technology

[0002] With the depletion of oil resources and increasing demands for greenhouse gas emissions, new energy vehicles are gaining popularity. Among them, flat wire motors, as a type of new energy motor, are increasingly being used in new energy vehicles due to their advantages such as high efficiency, good heat dissipation, and good vibration resistance.

[0003] In flat wire motors, the copper wires in the stator windings are formed into flat wires. Flat wires are beneficial to improving the slot fill factor of the motor. The improvement of the slot fill factor means that more copper can be filled without changing the space, which reduces the resistance of the motor.

[0004] In existing technologies, flat-wire motors mainly employ wave-wound or multi-layered winding structures. Designing the flat wires as multi-layered effectively reduces the motor's AC resistance. However, as the number of flat wires increases, the winding connection becomes more complex, which limits the motor's practical applications. Specifically:

[0005] 1. In a multi-parallel branch structure, especially with three or more branches, the different positions of the hairpin relative to the magnet in each branch, influenced by the magnetic field generated by the magnetic poles, will create a voltage difference between the branches, thus forming a circulating current. This circulating current will reduce motor efficiency, thereby shortening the vehicle's driving range.

[0006] 2. The copper wire span varies greatly and the arrangement is relatively complex, resulting in high mold investment costs.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] This utility model provides a flat wire motor stator and motor, aiming to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a flat wire motor stator, comprising a stator core and stator windings; the stator core has an annular structure, and multiple stator slots are provided on the inner sidewall of the stator core, all of which are evenly distributed along the circumferential inner sidewall of the stator core; each stator slot has N slot layers arranged radially along the stator core, and the slot layers are configured for wiring of the stator windings; the flat wire motor stator is used for a flat wire motor with Z stator slots and P pole pairs; the stator windings include three-phase windings. Each phase winding includes multiple branches, all of which are connected in parallel, and each branch is composed of multiple conductors connected in series. The conductors include hairpin conductors and lead conductors connected in series. Only the hairpin conductors have a span. The span of the hairpin conductors is equal to the pitch y. The pitch y is one of y=τ, y=τ+1, and y=τ-1, and the pole pitch τ=Z / 2P. The multiple branches include the first branch, the second branch, the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, and the eighth branch. The lead conductors in each branch are connected to the same external copper busbar to achieve parallel connection.

[0010] The relevant content in the above plan is explained as follows:

[0011] In the above scheme, the voltage difference between branches can be reduced by balancing the number and span of the hairpin wires in each branch, thereby reducing the probability of circulating current and avoiding affecting the motor's working efficiency.

[0012] In the above scheme, the span refers to the number of slots spanned by the two effective sides of the hairpin wire embedded in the stator slot, that is, the number of slots between the two stator slots after the first straight segment and the second straight segment are embedded in the two stator slots respectively.

[0013] In the above scheme, the number of pole pairs P refers to the number of positive or negative magnetic poles of the flat wire motor in this application.

[0014] Specifically, in this application, the number of positive or negative magnetic poles of the flat wire motor is 8, that is, the pitch y is one of 6, 7, or 5.

[0015] External copper busbars are a common method in existing technologies, and will not be elaborated on here.

[0016] A further technical solution is provided, wherein the three-phase winding includes a U-phase winding, a V-phase winding, and a W-phase winding; the U-phase winding is obtained by rotating the stator core axis as a reference and deflecting it by 360° / (2Pm)×2 angles in a first direction; the V-phase winding is obtained by rotating the stator core axis as a reference and deflecting it by 360° / (2Pm)×2 angles in a first direction; P is the number of pole pairs, m is the number of phases, and the number of phases is 3.

[0017] With the above design, after the position of the U-phase winding is determined, the V-phase winding can be obtained by simply deflecting it by 360° / (2Pm)×2. Then, the V-phase winding can be deflected by 360° / (2Pm)×2 to obtain the W-phase winding. This can improve wiring efficiency and eliminate the need to frequently consider the copper wire span during wiring.

[0018] It should be noted that the first direction in this application is clockwise.

[0019] In a further technical solution, the number of groove layers N is 8, and the directions of the 8 groove layers from the groove opening to the groove bottom are a, b, c, d, e, f, g and h respectively; wherein, the lead wire is only set in layer a or layer h.

[0020] The above design allows for the rapid determination of the positions of the hairpin wires and lead-out wires, enabling operators to locate them simply by considering the span of the hairpin wires within the stator slots. This further improves wiring efficiency.

[0021] A further technical solution includes a hairpin wire comprising a connecting segment, a first straight segment, a second straight segment, a first bent segment, and a second bent segment; the first straight segment is embedded in one stator slot, and the second straight segment is embedded in another stator slot, the two being parallel and symmetrical and spaced apart; the same end of the first straight segment and the second straight segment are respectively positioned and connected to the two ends of the connecting segment, the end of the first straight segment away from the connecting segment is connected to the first bent segment, and the end of the second straight segment away from the connecting segment is connected to the second bent segment; the first bent segment and the second bent segment are bent in opposite directions along the circumference of the stator core, and both extend to the outside of the stator slot; the span between the first straight segment and the second straight segment in the stator slot is equal to the pitch y; the pitch y is one of y=τ, τ+1, and τ-1, and the pole pitch τ=Z / 2P.

[0022] In the above scheme, the first bend segment and the second bend segment are used as welding ends. That is, when adjacent hairpin wires are welded, the first bend segment or the second bend segment on one hairpin wire is connected to the second bend segment or the first bend segment on the other hairpin wire.

[0023] In the above scheme, the fixing of the hairpin wire can be quickly achieved by determining the span. Specifically, since the lead wires are only set in layer a or layer h, and the number of lead wires is determined, the number of hairpin wires can also be quickly confirmed.

[0024] A further technical solution is provided, wherein the hairpin wire includes a connecting segment, a first straight segment, a second straight segment, a first bent segment, and a second bent segment; the first straight segment is embedded in one stator slot, and the second straight segment is embedded in another stator slot, the two being parallel and symmetrical and spaced apart; the same end of the first straight segment and the second straight segment are respectively positioned and connected to the two ends of the connecting segment, the end of the first straight segment away from the connecting segment is connected to the first bent segment, and the end of the second straight segment away from the connecting segment is connected to the second bent segment, the first bent segment and the second bent segment are bent in opposite directions along the circumference of the stator core, and both extend to the outside of the stator slot; the radial layer combination of the first straight segment and the second straight segment is: (layer b and layer a) or (layer d and layer c) or (layer f and layer e) or (layer b and layer c) or (layer d and layer e) or (layer f and layer g) or (layer h and layer g); in each combination, the layers of the first straight segment and the second straight segment are adjacent.

[0025] The above design is used to quickly determine the position of the stator slot and the position of the slot layer of the first and second straight segments in the hairpin wire.

[0026] In a further technical solution, the number of phases in the three-phase winding is m, m=3, and the number of branches is k; the total number of lead-out conductors is 2km; the number of conductors is L, L=(Z (number of slots)*N (number of layers)-2*k (number of branches)*m (number of phases)) / 2+2km; the total number of hairpin conductors is L-2km; the number of lead-out conductors per phase winding is 2k, and the number of hairpin conductors per phase winding is (L-2km) / m.

[0027] With the above design, the number of lead wires and hairpin wires can be quickly determined, thereby enabling operators to further improve wiring efficiency during wiring.

[0028] Specifically, since the number of phases m=3 and the number of branches k=8, the total number of lead-out wires is 2km, 2km=48, and the number of wires is L, L=(96 (number of slots)*8 (number of layers)-2*8 (number of branches)*3 (number of phases)) / 2+2*8 (number of branches)*3 (number of phases)=408. The total number of hairpin wires is L-2km, L-2km=360. The number of lead-out wires per phase winding is 2k, 2k=16. The number of hairpin wires per phase winding is (L-2km) / m, (L-2km) / m=120. Therefore, there are 2 lead-out wires and 15 hairpin wires in each branch.

[0029] A further technical solution is that the lead wire includes a third bent section, a lead section located on the outside of the stator core end, and a third straight section configured to be embedded in the stator slot and extending along the stator axis; the lead section, the third straight section, and the third bent section are connected in sequence, and the third bent section extends to the outside of the stator slot and bends along the circumference of the stator core.

[0030] The third bend serves as the welding end.

[0031] With the above design, the lead-out wire serves as a component that connects to external wires, which generally refer to copper busbars.

[0032] Since there are 8 branches, the lead wires on each branch will be connected to the same copper busbar to achieve parallel connection.

[0033] During welding, the third, first, and second bends serve as the welding ends and are located at the lower end of the stator core; the lead-out section is located at the upper end of the stator core. This layout allows the operator to focus solely on welding the lower end of the stator core.

[0034] A further technical solution, based on the U-phase winding, when the number of branches k=8, the number of slots Z=96, the number of layers N=8, and the number of phases m=3, the number of lead wires in the U-phase winding is 2k=16, and the number of hairpin wires (L-2km) / m=120; wherein, the first branch has 2 lead wires and 15 hairpin wires; in the first branch, the connection route of the 2 lead wires and 15 hairpin wires in the stator slot is: 1 slot a layer - 7 slot b layer - 14 slot a layer - 20 Slot b layer - 25 Slot a layer - 31 Slot b layer - 38 Slot a layer - 44 Slot b layer - 50 Slot c layer - 56 Slot d layer - 61 Slot c layer - 67 Slot d layer - 74 Slot c layer - 80 Slot d layer - 85 Slot c layer - 91 Slot d layer - 1 Slot e layer - 7 Slot f layer - 14 Slot e layer - 20 Slot f layer - 25 Slot e layer - 31 Slot f layer - 38 Slot e layer - 44 Slot f layer - 50 Slot g layer - 56 Slot h layer - 61 Slot g layer - 67 Slot h layer - 74 Slot g layer - 80 Slot h layer - 85 Slot g layer - 91 Slot h layer.

[0035] Since the lead wires in the first branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0036] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the second branch within the stator slot is as follows: Slot 2a layer - Slot 8b layer - Slot 13a layer - Slot 19b layer - Slot 26a layer - Slot 32b layer - Slot 37a layer - Slot 43b layer - Slot 49c layer - Slot 55d layer - Slot 62c layer - Slot 68d layer - Slot 73c layer - Slot 79d layer - Slot 86c layer - Slot 92d layer - Slot 2e layer - Slot 8f layer - Slot 13e layer - Slot 19f layer - Slot 26e layer - Slot 32f layer - Slot 37e layer - Slot 43f layer - Slot 49g layer - Slot 55h layer - Slot 62g layer - Slot 68h layer - Slot 73g layer - Slot 79h layer - Slot 86g layer - Slot 92h layer.

[0037] Since the lead wires in the second branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0038] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the third branch within the stator slot is as follows: Slot 1 (h layer) - Slot 91 (g layer) - Slot 86 (h layer) - Slot 80 (g layer) - Slot 73 (h layer) - Slot 67 (g layer) - Slot 62 (h layer) - Slot 56 (g layer) - Slot 50 (f layer) - Slot 44 (e layer) - Slot 37 (f layer) - Slot 31 (e layer) - Slot 26 (f layer) - Slot 20 (e layer) - Slot 13 (f layer) - Slot 7 (e layer) - Slot 1 (d layer) - Slot 91 (c layer) - Slot 86 (d layer) - Slot 80 (c layer) - Slot 73 (d layer) - Slot 67 (c layer) - Slot 62 (d layer) - Slot 56 (c layer) - Slot 50 (b layer) - Slot 44 (a layer) - Slot 37 (b layer) - Slot 31 (a layer) - Slot 26 (b layer) - Slot 20 (a layer) - Slot 13 (b layer) - Slot 7 (a layer).

[0039] Since the lead wires in the third branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0040] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the fourth branch within the stator slot is as follows: Slot 2h layer - Slot 92g layer - Slot 85h layer - Slot 79g layer - Slot 74h layer - Slot 68g layer - Slot 61h layer - Slot 55g layer - Slot 49f layer - Slot 43e layer - Slot 38f layer - Slot 32e layer - Slot 25f layer - Slot 19e layer - Slot 14f layer - Slot 8e layer - Slot 2d layer - Slot 92c layer - Slot 85d layer - Slot 79c layer - Slot 74d layer - Slot 68c layer - Slot 61d layer - Slot 55c layer - Slot 49b layer - Slot 43a layer - Slot 38b layer - Slot 32a layer - Slot 25b layer - Slot 19a layer - Slot 14b layer - Slot 8a layer.

[0041] Since the lead wires in the fourth branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0042] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the fifth branch within the stator slot is as follows: 49 slot a layer - 55 slot b layer - 62 slot a layer - 68 slot b layer - 73 slot a layer - 79 slot b layer - 86 slot a layer - 92 slot b layer - 2 slot c layer - 8 slot d layer - 13 slot c layer - 19 slot d layer - 26 slot c layer - 32 slot d layer - 37 slot c layer - 43 slot d layer - 49 slot e layer - 55 slot f layer - 62 slot e layer - 68 slot f layer - 73 slot e layer - 79 slot f layer - 86 slot e layer - 92 slot f layer - 2 slot g layer - 8 slot h layer - 13 slot g layer - 19 slot h layer - 26 slot g layer - 32 slot h layer - 37 slot g layer - 43 slot h layer.

[0043] Since the lead wires in the fifth branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0044] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the stator slots of the sixth branch is as follows: 50 slot a layer - 56 slot b layer - 61 slot a layer - 67 slot b layer - 74 slot a layer - 80 slot b layer - 85 slot a layer - 91 slot b layer - 1 slot c layer - 7 slot d layer - 14 slot c layer - 20 slot d layer - 25 slot c layer - 31 slot d layer - 38 slot c layer - 44 slot d layer - 50 slot e layer - 56 slot f layer - 61 slot e layer - 67 slot f layer - 74 slot e layer - 80 slot f layer - 85 slot e layer - 91 slot f layer - 1 slot g layer - 7 slot h layer - 14 slot g layer - 20 slot h layer - 25 slot g layer - 31 slot h layer - 38 slot g layer - 44 slot h layer.

[0045] Since the lead wires in the sixth branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0046] In a further technical solution, the connection route of the 2 lead wires and 15 hairpin wires in the stator slots of the seventh branch is as follows: 49 slot h layer - 43 slot g layer - 38 slot h layer - 32 slot g layer - 25 slot h layer - 19 slot g layer - 14 slot h layer - 8 slot g layer - 2 slot f layer - 92 slot e layer - 85 slot f layer - 79 slot e layer - 74 slot f layer - 68 slot e layer - 61 slot f layer - 55 slot e layer - 49 slot d layer - 43 slot c layer - 38 slot d layer - 32 slot c layer - 25 slot d layer - 19 slot c layer - 14 slot d layer - 8 slot c layer - 2 slot b layer - 92 slot a layer - 85 slot b layer - 79 slot a layer - 74 slot b layer - 68 slot a layer - 61 slot b layer - 55 slot a layer.

[0047] Since the lead wires in the seventh branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0048] In a further technical solution, the connection route of the two lead wires and 15 hairpin wires in the stator slots of the eighth branch is as follows: 50 slot h layer - 44 slot g layer - 37 slot h layer - 31 slot g layer - 26 slot h layer - 20 slot g layer - 13 slot h layer - 7 slot g layer - 1 slot f layer - 91 slot e layer - 86 slot f layer - 80 slot e layer - 73 slot f layer - 67 slot e layer - 62 slot f layer - 56 slot e layer - 50 slot d layer - 44 slot c layer - 37 slot d layer - 31 slot c layer - 26 slot d layer - 20 slot c layer - 13 slot d layer - 7 slot c layer - 1 slot b layer - 91 slot a layer - 86 slot b layer - 80 slot a layer - 73 slot b layer - 67 slot a layer - 62 slot b layer - 56 slot a layer.

[0049] Since the lead wires in the eighth branch have no span, and the types of hairpin wire spans are limited (only 3 types), only one of the three spans needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0050] This utility model also provides a flat wire motor, including a flat wire motor stator.

[0051] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0052] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0053] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0054] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0055] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0056] The working principle and advantages of this utility model are as follows:

[0057] This invention reduces the voltage difference between branches by balancing the number and span of the hairpin wires in each branch, thereby reducing the probability of circulating current and preventing the motor's working efficiency from being affected. Attached Figure Description

[0058] Appendix Figure 1 This is a schematic diagram of the stator core structure in an embodiment of the present utility model;

[0059] Appendix Figure 2 This is a schematic diagram of the stator winding wiring on the stator core in an embodiment of the present invention;

[0060] Appendix Figure 3 This is a schematic diagram of the stator winding structure in an embodiment of the present utility model;

[0061] Appendix Figure 4 This is a schematic diagram of the hairpin wire structure in an embodiment of the present utility model;

[0062] Appendix Figure 5 This is a schematic diagram of the lead wire structure in an embodiment of the present utility model;

[0063] Appendix Figure 6 This is a schematic diagram of the wiring principle of the hairpin wire and the lead wire in the first branch (U-phase winding) in the embodiment of this utility model.

[0064] Appendix Figure 7 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the second branch (U-phase winding) in an embodiment of the present invention.

[0065] Appendix Figure 8 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the third branch (U-phase winding) in this embodiment of the utility model.

[0066] Appendix Figure 9 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the fourth branch (U-phase winding) in this embodiment of the utility model.

[0067] Appendix Figure 10 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the fifth branch (U-phase winding) in this embodiment of the present invention.

[0068] Appendix Figure 11This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the sixth branch (U-phase winding) in this embodiment of the utility model.

[0069] Appendix Figure 12 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the seventh branch (U-phase winding) in this embodiment of the utility model.

[0070] Appendix Figure 13 This is a schematic diagram of the wiring principle of the hairpin wire and lead wire in the eighth branch (U-phase winding) in this embodiment of the utility model.

[0071] Appendix Figure 14 This is a schematic diagram of the stator slot layer in an embodiment of the present invention (from the slot opening to the bottom of the slot).

[0072] In the above attached diagram: 1. Stator core; 2. Stator winding; 3. Stator slot; 4. Conductor; 5. Hairpin conductor; 6. Lead-out conductor; 7. Connecting section; 8. First straight section; 9. Second straight section; 10. First bent section; 11. Second bent section; 12. Lead-out section; 13. Third straight section; 14. Third bent section. Detailed Implementation

[0073] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0074] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0075] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0076] See appendix Figures 1-14As shown, a flat wire motor stator includes a stator core 1 and a stator winding 2. The stator core 1 has an annular structure, and multiple stator slots 3 are provided on the inner sidewall of the stator core 1. All stator slots 3 are evenly distributed along the circumferential inner sidewall of the stator core 1. Each stator slot 3 has N slot layers arranged radially along the stator core 1. The slot layers are configured for wiring of the stator winding 2. The flat wire motor stator is used for a flat wire motor with Z stator slots 3 and P pole pairs. The stator winding 2 includes a three-phase winding, and each phase winding is wrapped with... It includes multiple branches, all of which are connected in parallel, and each branch is composed of multiple conductors 4 connected in series; the conductors 4 include hairpin conductors 5 and lead conductors 6 connected in series; wherein, only the hairpin conductors 5 have a span; the span of the hairpin conductors 5 is equal to the pitch y; the pitch y is one of y=τ, y=τ+1, y=τ-1, and the pole pitch τ=Z / 2P; the multiple branches include the first branch, the second branch, the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, and the eighth branch; the lead conductors 6 in each branch are connected to the same external copper busbar to achieve parallel connection.

[0077] In this invention, the voltage difference between branches can be reduced by balancing the number and span of the hairpin wires 5 in each branch, thereby reducing the probability of circulating current and preventing the motor's working efficiency from being affected.

[0078] In this embodiment, the span refers to the number of slots crossed by the two effective sides of the hairpin wire 5 embedded in the stator slot 3, that is, the number of slots between the two stator slots 3 after the first straight segment 8 and the second straight segment 9 are respectively embedded in the two stator slots 3.

[0079] In this embodiment, the number of pole pairs P refers to the number of positive or negative magnetic poles of the flat wire motor in this application.

[0080] Specifically, in this application, the number of positive or negative magnetic poles of the flat wire motor is 8, that is, the pitch y is one of 6, 7, or 5.

[0081] Preferably, the three-phase winding includes a U-phase winding, a V-phase winding, and a W-phase winding; the U-phase winding is obtained by rotating the stator core 1 axis by 360° / (2Pm)×2 angles in a first direction to obtain the V-phase winding, and the V-phase winding is obtained by rotating the stator core 1 axis by 360° / (2Pm)×2 angles in a first direction to obtain the W-phase winding; P is the number of pole pairs, m is the number of phases, and the number of phases is 3.

[0082] With the above design, after the position of the U-phase winding is determined, the V-phase winding can be obtained by simply deflecting it by 360° / (2Pm)×2. Then, the V-phase winding can be deflected by 360° / (2Pm)×2 to obtain the W-phase winding. This can improve wiring efficiency and eliminate the need to frequently consider the copper wire span during wiring.

[0083] It should be noted that the first direction in this application is clockwise.

[0084] The angle of deflection is 360° / (2Pm)×2, which is 360° / (2*8*3)×2=15°. Since this application has 96 slots, the angle between adjacent stator slots 3 is 3.75°. Rotating 15° means rotating 4 stator slots 3 clockwise.

[0085] Preferably, the number of groove layers N is 8, and the directions of the 8 groove layers from the groove opening to the groove bottom are a, b, c, d, e, f, g and h respectively; wherein, the lead wire 6 is only set in layer a or layer h.

[0086] With the above design, the positions of the hairpin wire 5 and the lead wire 6 can be quickly determined, allowing the operator to locate the hairpin wire 5 simply by measuring its span within the stator slot 3. This further improves wiring efficiency.

[0087] Preferably, the hairpin wire 5 includes a connecting segment 7, a first straight segment 8, a second straight segment 9, a first bent segment 10, and a second bent segment 11; the first straight segment 8 is embedded in one stator slot 3, and the second straight segment 9 is embedded in another stator slot 3, which are parallel and symmetrical and spaced apart; the same end of the first straight segment 8 and the second straight segment 9 are respectively positioned and connected to the two ends of the connecting segment 7, the end of the first straight segment 8 away from the connecting segment 7 is connected to the first bent segment 10, and the end of the second straight segment 9 away from the connecting segment 7 is connected to the second bent segment 11. The first bent segment 10 and the second bent segment 11 are bent in opposite directions along the circumference of the stator core 1, and both extend to the outside of the stator slot 3; the span between the first straight segment 8 and the second straight segment 9 in the stator slot 3 is equal to the pitch y; the pitch y is one of y=τ, τ+1, and τ-1, and the pole distance τ=Z / 2P.

[0088] In this embodiment, the first bending segment 10 and the second bending segment 11 are used as welding ends. That is, when adjacent hairpin wires 5 are welded, the first bending segment 10 or the second bending segment 11 on one hairpin wire 5 is connected to the second bending segment 11 or the first bending segment 10 on the other hairpin wire 5.

[0089] In this embodiment, the hairpin wire 5 can be quickly fixed by determining the span. Specifically, since the lead wire 6 is only set in layer a or layer h, and the number of lead wire 6 is determined, the number of hairpin wire 5 can also be quickly confirmed.

[0090] Preferably, the hairpin wire 5 includes a connecting segment 7, a first straight segment 8, a second straight segment 9, a first bent segment 10, and a second bent segment 11; the first straight segment 8 is embedded in one stator slot 3, and the second straight segment 9 is embedded in another stator slot 3, the two being parallel and symmetrical and spaced apart; the ends of the first straight segment 8 and the second straight segment 9 are respectively positioned and connected to the two ends of the connecting segment 7, and the end of the first straight segment 8 away from the connecting segment 7 is connected to the first bent segment 10, the second straight segment 9... The end of segment 9 furthest from connecting segment 7 is connected to the second bending segment 11. The first bending segment 10 and the second bending segment 11 are bent in opposite directions along the circumference of the stator core 1, and both extend to the outside of the stator slot 3. The radial layer combination of the first straight segment 8 and the second straight segment 9 is: (layer b and layer a) or (layer d and layer c) or (layer f and layer e) or (layer b and layer c) or (layer d and layer e) or (layer f and layer g) or (layer h and layer g). In each combination, the layers of the first straight segment 8 and the second straight segment 9 are adjacent.

[0091] The above design is used to quickly determine the position of the stator slot 3 and the position of the slot layer of the first straight segment 8 and the second straight segment 9 in the hairpin wire 5.

[0092] Preferably, the number of phases in the three-phase winding is m, m=3, and the number of branches is k; the total number of lead-out conductors 6 is 2km; the number of conductors 4 is L, L=(Z (number of slots)*N (number of layers)-2*k (number of branches)*m (number of phases)) / 2+2km; the total number of hairpin conductors 5 is L-2km; the number of lead-out conductors 6 per phase winding is 2k, and the number of hairpin conductors 5 per phase winding is (L-2km) / m.

[0093] With the above design, the number of lead wires 6 and hairpin wires 5 can be quickly determined, thereby enabling operators to further improve wiring efficiency during wiring.

[0094] Specifically, since the number of phases m=3 and the number of branches k=8, the total number of lead-out wires 6 is 2km, 2km=48. The number of wires 4 is L, L=(96 (number of slots)*8 (number of layers)-2*8 (number of branches)*3 (number of phases)) / 2+2*8 (number of branches)*3 (number of phases)=408. The total number of hairpin wires 5 is L-2km, L-2km=360. The number of lead-out wires 6 per phase winding is 2k, 2k=16. The number of hairpin wires 5 per phase winding is (L-2km) / m, (L-2km) / m=120. Therefore, there are 2 lead-out wires 6 and 15 hairpin wires 5 in each branch.

[0095] Preferably, the lead wire 6 includes a third bent section 14, a lead section 12 located on the outer side of the end of the stator core 1, and a third straight section 13 configured to be embedded in the stator slot 3 and extending along the stator axis; the lead section 12, the third straight section 13 and the third bent section 14 are connected in sequence, and the third bent section 14 extends to the outside of the stator slot 3 and bends along the circumference of the stator core 1.

[0096] The third bend segment 14 exists as a welding end.

[0097] With the above design, the lead wire 6 serves as a component that connects to the external wire 4, which generally refers to a copper busbar.

[0098] Since there are 8 branches, the lead wire 6 of each branch will be connected to the same copper busbar to achieve parallel connection.

[0099] During welding, the third bend section 14, the first bend section 10, and the second bend section 11 serve as welding ends and are located at the lower end of the stator core 1; the lead-out section 12 is located at the upper end of the stator core 1. This layout allows the operator to focus solely on welding operations at the lower end of the stator core 1.

[0100] It should be noted that, with Figure 2 and Figure 3 For example, when the two lead wires 6 and the 15 hairpin wires 5 are soldered, they are connected by the bending section at the lower end. For instance, when the lead wire 6 is connected to the hairpin wire 5, the third bending section 14 in the lead wire 6 is soldered to the first bending section 10 or the second bending section 11 in the hairpin wire 5; when adjacent hairpin wires 5 are connected, the first bending section 10 or the second bending section 11 in one hairpin wire 5 is connected to the second bending section 11 or the first bending section 10 in the other hairpin wire 5.

[0101] In each branch, there are 2 lead-out wires 6 and 15 hairpin wires 5, so most of them are connected by adjacent hairpin wires 5.

[0102] Preferably, based on the U-phase winding, when the number of branches k=8, the number of slots Z=96, the number of layers N=8, and the number of phases m=3, the number of lead wires 6 in the U-phase winding is 2k=16, and the number of hairpin wires 5 is (L-2km) / m=120; wherein, there are 2 lead wires 6 and 15 hairpin wires 5 in the first branch; in the first branch, the connection route of the 2 lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is: slot 1a layer-slot 7b layer-slot 14a layer-2 0 slot b layer - 25 slot a layer - 31 slot b layer - 38 slot a layer - 44 slot b layer - 50 slot c layer - 56 slot d layer - 61 slot c layer - 67 slot d layer - 74 slot c layer - 80 slot d layer - 85 slot c layer - 91 slot d layer - 1 slot e layer - 7 slot f layer - 14 slot e layer - 20 slot f layer - 25 slot e layer - 31 slot f layer - 38 slot e layer - 44 slot f layer - 50 slot g layer - 56 slot h layer - 61 slot g layer - 67 slot h layer - 74 slot g layer - 80 slot h layer - 85 slot g layer - 91 slot h layer.

[0103] Since the lead wire 6 in the first branch has no span, and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0104] Preferably, in the second branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: 2 slot a layer - 8 slot b layer - 13 slot a layer - 19 slot b layer - 26 slot a layer - 32 slot b layer - 37 slot a layer - 43 slot b layer - 49 slot c layer - 55 slot d layer - 62 slot c layer - 68 slot d layer - 73 slot c layer - 79 slot d layer - 86 slot c layer - 92 slot d layer - 2 slot e layer - 8 slot f layer - 13 slot e layer - 19 slot f layer - 26 slot e layer - 32 slot f layer - 37 slot e layer - 43 slot f layer - 49 slot g layer - 55 slot h layer - 62 slot g layer - 68 slot h layer - 73 slot g layer - 79 slot h layer - 86 slot g layer - 92 slot h layer.

[0105] Since the lead wire 6 in the second branch has no span, and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0106] Preferably, in the third branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: slot 1h layer - slot 91g layer - slot 86h layer - slot 80g layer - slot 73h layer - slot 67g layer - slot 62h layer - slot 56g layer - slot 50f layer - slot 44e layer - slot 37f layer - slot 31e layer - slot 26f layer - slot 20e layer - slot 13f layer - slot 7e layer - slot 1d layer - slot 91c layer - slot 86d layer - slot 80c layer - slot 73d layer - slot 67c layer - slot 62d layer - slot 56c layer - slot 50b layer - slot 44a layer - slot 37b layer - slot 31a layer - slot 26b layer - slot 20a layer - slot 13b layer - slot 7a layer.

[0107] Since the lead wire 6 in the third branch has no span and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0108] Preferably, in the fourth branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: slot 2h layer - slot 92g layer - slot 85h layer - slot 79g layer - slot 74h layer - slot 68g layer - slot 61h layer - slot 55g layer - slot 49f layer - slot 43e layer - slot 38f layer - slot 32e layer - slot 25f layer - slot 19e layer - slot 14f layer - slot 8e layer - slot 2d layer - slot 92c layer - slot 85d layer - slot 79c layer - slot 74d layer - slot 68c layer - slot 61d layer - slot 55c layer - slot 49b layer - slot 43a layer - slot 38b layer - slot 32a layer - slot 25b layer - slot 19a layer - slot 14b layer - slot 8a layer.

[0109] Since the lead wire 6 in the fourth branch has no span and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0110] Preferably, in the fifth branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: 49 slot a layer - 55 slot b layer - 62 slot a layer - 68 slot b layer - 73 slot a layer - 79 slot b layer - 86 slot a layer - 92 slot b layer - 2 slot c layer - 8 slot d layer - 13 slot c layer - 19 slot d layer - 26 slot c layer - 32 slot d layer - 37 slot c layer - 43 slot d layer - 49 slot e layer - 55 slot f layer - 62 slot e layer - 68 slot f layer - 73 slot e layer - 79 slot f layer - 86 slot e layer - 92 slot f layer - 2 slot g layer - 8 slot h layer - 13 slot g layer - 19 slot h layer - 26 slot g layer - 32 slot h layer - 37 slot g layer - 43 slot h layer.

[0111] Since the lead wire 6 in the fifth branch has no span, and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0112] Preferably, in the sixth branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: 50 slot a layer - 56 slot b layer - 61 slot a layer - 67 slot b layer - 74 slot a layer - 80 slot b layer - 85 slot a layer - 91 slot b layer - 1 slot c layer - 7 slot d layer - 14 slot c layer - 20 slot d layer - 25 slot c layer - 31 slot d layer - 38 slot c layer - 44 slot d layer - 50 slot e layer - 56 slot f layer - 61 slot e layer - 67 slot f layer - 74 slot e layer - 80 slot f layer - 85 slot e layer - 91 slot f layer - 1 slot g layer - 7 slot h layer - 14 slot g layer - 20 slot h layer - 25 slot g layer - 31 slot h layer - 38 slot g layer - 44 slot h layer.

[0113] Since the lead wire 6 in the sixth branch has no span and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0114] Preferably, in the seventh branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: slot h layer 49 - slot g layer 43 - slot h layer 38 - slot g layer 32 - slot g layer 25 - slot h layer 19 - slot g layer 14 - slot h layer 8 - slot g layer 2 - slot f layer 92 - slot e layer 85 - slot f layer 79 - slot e layer 74 - slot f layer 68 - slot e layer 61 - slot f layer 55 - slot e layer 49 - slot d layer 43 - slot c layer 38 - slot c layer 32 - slot c layer 25 - slot d layer 19 - slot c layer 14 - slot d layer 8 - slot c layer 2 - slot b layer 92 - slot a layer 85 - slot b layer 79 - slot a layer 74 - slot b layer 68 - slot b layer 61 - slot a layer 55.

[0115] Since the lead wire 6 in the seventh branch has no span and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0116] Preferably, in the eighth branch, the connection route of the two lead wires 6 and the 15 hairpin wires 5 in the stator slot 3 is as follows: 50 slot h layer - 44 slot g layer - 37 slot h layer - 31 slot g layer - 26 slot h layer - 20 slot g layer - 13 slot h layer - 7 slot g layer - 1 slot f layer - 91 slot e layer - 86 slot f layer - 80 slot e layer - 73 slot f layer - 67 slot e layer - 62 slot f layer - 56 slot e layer - 50 slot d layer - 44 slot c layer - 37 slot d layer - 31 slot c layer - 26 slot d layer - 20 slot c layer - 13 slot d layer - 7 slot c layer - 1 slot b layer - 91 slot a layer - 86 slot b layer - 80 slot a layer - 73 slot b layer - 67 slot a layer - 62 slot b layer - 56 slot a layer.

[0117] Since the lead wire 6 in the eighth branch has no span and the hairpin wire 5 has only three span options, only one of the three span options needs to be selected in practice. This design effectively avoids circulating currents between multiple parallel branches of each phase winding, thereby improving motor efficiency.

[0118] It should be noted that, in order to further balance the electromotive force and avoid circulating current, the number of slots per pole per phase is q = Z / (2Pm), q = 96 / (2 * 8 * 3) = 3. That is, a 16-pole, 96-slot motor normally has 2 slots allocated per pole per phase. For details, please refer to... Figures 6-13 .

[0119] This utility model also provides a flat wire motor, including a flat wire motor stator.

[0120] Additionally, the following description is provided for all lead-out conductors 6 that are only installed on layer a or layer h:

[0121] The wiring method for all lead wires 6 set only on layer a or layer h is as follows: (There are a total of 48 lead wires 6, 16 per phase and 2 per branch in the three-phase winding)

[0122] In the U-phase winding, in the first branch, the third straight segment 13 of one lead wire 6 is embedded in the first slot a layer, and the third straight segment 13 of the other lead wire 6 is embedded in the 91st slot h layer; in the second branch, the third straight segment 13 of one lead wire 6 is embedded in the 2nd slot a layer, and the third straight segment 13 of the other lead wire 6 is embedded in the 92nd slot h layer; in the third branch, the third straight segment 13 of one lead wire 6 is embedded in the 1st slot h layer, and the third straight segment 13 of the other lead wire 6 is embedded in the 7th slot a layer; in the fourth branch, the third straight segment 13 of one lead wire 6 is embedded in the 2nd slot h layer, and the third straight segment 13 of the other lead wire 6 is embedded in the 8th slot a layer; In the fifth branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 49, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 43; in the sixth branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 50, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 44; in the seventh branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 49, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 55; in the eighth branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 50, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 56.

[0123] In the V-phase winding, in the first branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 5, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 95; in the second branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 6, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 96; in the third branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 5, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 11; in the fourth branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 6, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 12. In the fifth branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 53, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 47; in the sixth branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 54, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 48; in the seventh branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 53, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 59; in the eighth branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 54, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 60.

[0124] In the W-phase winding, the third straight segment 13 of one lead wire 6 in the first branch is embedded in layer a of slot 9, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 3; the third straight segment 13 of one lead wire 6 in the first branch is embedded in layer a of slot 10, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 4; the third straight segment 13 of one lead wire 6 in the first branch is embedded in layer h of slot 9, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 15; the third straight segment 13 of one lead wire 6 in the first branch is embedded in layer h of slot 10, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 16. In the first branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 57, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 51; in the first branch, the third straight segment 13 of one lead wire 6 is embedded in layer a of slot 58, and the third straight segment 13 of the other lead wire 6 is embedded in layer h of slot 52; in the first branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 57, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 63; in the first branch, the third straight segment 13 of one lead wire 6 is embedded in layer h of slot 58, and the third straight segment 13 of the other lead wire 6 is embedded in layer a of slot 64.

[0125] Table 1. The wiring method for all lead-out conductors 6 that are only installed on layer a or layer h is as follows:

[0126] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A flat wire motor stator, characterized in that: Including stator core (1) and stator winding (2); The stator core (1) has an annular structure, and a plurality of stator slots (3) are provided on the inner sidewall of the stator core (1). All the stator slots (3) are evenly distributed along the circumferential inner sidewall of the stator core (1). Each of the stator slots (3) is provided with N slot layers along the radial direction of the stator core (1), and the slot layers are configured for wiring of the stator windings (2). The flat wire motor stator is used for a flat wire motor with a number of Z stator slots (3) and a number of P pole pairs. The stator winding (2) includes a three-phase winding. Each phase winding in the three-phase winding includes multiple branches. All branches are connected in parallel, and each branch is composed of multiple conductors (4) connected in series. The conductor (4) includes a hairpin conductor (5) and a lead conductor (6) arranged in series; wherein only the hairpin conductor (5) has a span; The span of the hairpin wire (5) is equal to the pitch y; The pitch y is one of y=τ, y=τ+1, and y=τ-1, and the polar distance τ=Z / 2P; The plurality of said branches include the first branch, the second branch, the third branch, the fourth branch, the fifth branch, the sixth branch, the seventh branch, and the eighth branch; The lead wires (6) in each branch are connected to the same external copper busbar to achieve parallel connection.

2. The flat wire motor stator according to claim 1, characterized in that: The three-phase winding includes a U-phase winding, a V-phase winding, and a W-phase winding; The U-phase winding is based on the axis of the stator core (1) and deflected by 360° / (2Pm)×2 in the first direction to obtain the V-phase winding. The V-phase winding is based on the axis of the stator core (1) and deflected by 360° / (2Pm)×2 in the first direction to obtain the W-phase winding. P is the number of pole pairs and m is the number of phases, where the number of phases is 3.

3. The flat wire motor stator according to claim 2, characterized in that: The number of groove layers N is 8, and the directions of the 8 groove layers from the groove opening to the groove bottom are a, b, c, d, e, f, g and h respectively; The lead wire (6) is only set in layer a or layer h.

4. The flat wire motor stator according to claim 1, characterized in that: The hairpin wire (5) includes a connecting section (7), a first straight section (8), a second straight section (9), a first bent section (10), and a second bent section (11). The first straight segment (8) is embedded in one stator slot (3), and the second straight segment (9) is embedded in another stator slot (3). The two are parallel and symmetrical and are set apart. The ends of the first straight segment (8) and the second straight segment (9) are respectively positioned and connected to the two ends of the connecting segment (7). The end of the first straight segment (8) away from the connecting segment (7) is connected to the first bent segment (10), and the end of the second straight segment (9) away from the connecting segment (7) is connected to the second bent segment (11). The first bent segment (10) and the second bent segment (11) are bent in opposite directions along the circumference of the stator core (1), and both extend to the outside of the stator slot (3). The span between the first straight segment (8) and the second straight segment (9) in the stator slot (3) is equal to the pitch y; The pitch y is one of y=τ, τ+1, τ-1, and the polar distance τ=Z / 2P.

5. The flat wire motor stator according to claim 3, characterized in that: The hairpin wire (5) includes a connecting section (7), a first straight section (8), a second straight section (9), a first bent section (10), and a second bent section (11). The first straight segment (8) is embedded in one stator slot (3), and the second straight segment (9) is embedded in another stator slot (3). The two are parallel and symmetrical and are set apart. The ends of the first straight segment (8) and the second straight segment (9) are respectively positioned and connected to the two ends of the connecting segment (7). The end of the first straight segment (8) away from the connecting segment (7) is connected to the first bent segment (10), and the end of the second straight segment (9) away from the connecting segment (7) is connected to the second bent segment (11). The first bent segment (10) and the second bent segment (11) are bent in opposite directions along the circumference of the stator core (1), and both extend to the outside of the stator slot (3). The radial layer combination of the first straight segment (8) and the second straight segment (9) is as follows: (layer b and layer a) or (layer d and layer c) or (layer f and layer e) or (layer b and layer c) or (layer d and layer e) or (layer f and layer g) or (layer h and layer g). In each combination, the first straight segment (8) and the second straight segment (9) are located on adjacent layers.

6. The flat wire motor stator according to claim 1, characterized in that: The number of phases in the three-phase winding is m, m=3, and the number of branches is k; The total number of the lead-out conductors (6) is 2km; The number of the wires (4) is L, where L = (Z*N - 2*k*m) / 2 + 2km; the total number of the hairpin wires (5) is L - 2km; The number of lead wires (6) for each phase winding is 2k, and the number of hairpin wires (5) for each phase winding is (L-2km) / m.

7. The flat wire motor stator according to claim 1, characterized in that: The lead wire (6) includes a third bent section (14), a lead section (12) located on the outside of the end of the stator core (1), and a third straight section (13) configured to be embedded in the stator slot (3) and extending along the stator axis. The lead-out section (12), the third straight section (13) and the third bent section (14) are connected in sequence. The third bent section (14) extends to the outside of the stator slot (3) and bends along the circumference of the stator core (1).

8. The flat wire motor stator according to claim 3, characterized in that: Based on the U-phase winding, when the number of branches k=8, the number of slots Z=96, the number of layers N=8, and the number of phases m=3, the number of lead wires (6) in the U-phase winding is 2k=16, and the number of hairpin wires (5) is (L-2km) / m=120. Among them, the number of lead wires (6) in the first to eighth branches is 2 and the number of hairpin wires (5) is 15.

9. A flat wire motor, characterized in that: Includes the flat wire motor stator as described in any one of claims 1-8.

Images