A flat wire motor stator, a flat wire motor and a vehicle

Abstract

This invention discloses a flat-wire motor stator, including stator windings and a stator core. The stator core has multiple core slots circumferentially arranged. The stator windings include multi-phase windings, each phase winding including winding lines. Each winding line includes a branch, and each branch includes multiple main coil groups and auxiliary coil groups alternately connected in series on the circumferential core slots of the stator core. The main coil group includes multiple coils passing through two adjacent pairs of core slots and connected in series, wherein the coils in the middle layer span between adjacent layers, and the innermost and outermost coils are located in the same layer. The auxiliary coil group includes at least two coils passing through the same pair of core slots and connected in series, with the coil located in the middle layer and spanning between adjacent layers. A flat-wire motor, including a flat-wire motor stator, is also disclosed. A vehicle, including a flat-wire motor, is also disclosed. This flat-wire motor stator, flat-wire motor, and vehicle have advantages such as good symmetry, reduced losses, increased efficiency, and improved service life.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a flat wire motor stator, a flat wire motor, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicle technology, the performance requirements for drive motors, as one of the key actuators in electric vehicles, are becoming increasingly stringent. Currently, high speed, lightweight design, and high efficiency have become the development trends for drive motors, placing higher demands on their power density, high-efficiency range, and heat dissipation capabilities.

[0003] Stator windings can be divided into round wire and flat wire. Compared with round wire windings, flat wire windings can effectively improve the slot fill factor, reduce copper losses, and thus improve motor efficiency. They can also reduce the height of the winding ends, thereby reducing motor size and increasing power / torque density. However, flat wire windings inherently exhibit the skin effect, especially in high-speed motors where the skin effect is more pronounced. To reduce the skin effect, the number of conductors in the stator slots is generally increased, such as 4, 6, 8, or 10 layers.

[0004] Since the conductors of each parallel branch are distributed at different positions within the iron core slot, if the branches are asymmetrical, it will lead to significant differences in back EMF, resistance, and inductance, thereby forming circulating current, increasing additional losses and efficiency, and causing local overheating of the motor windings, thus reducing the service life of the motor.

[0005] The winding arrangement and connection method of flat wire motors is one of the challenges in the design of this type of motor. Existing coil arrangement methods generally have the following problems:

[0006] 1) The existence of unbalanced winding circuits will lead to differences in back EMF, resistance, inductance, etc., resulting in a decrease in motor performance; it will also cause circulating current between different branch windings, increase additional losses in the motor, and cause local overheating of the motor.

[0007] 2) There are many irregularly shaped coils. The presence of irregularly shaped coils increases the difficulty of coil manufacturing and is not conducive to mass production.

[0008] 3) There are many types of coils and the arrangement is complicated; a large number of busbars and busbars are needed to connect the branches and center points of each phase winding, which will increase the height of the winding ends and increase the axial length of the motor. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a flat wire motor stator, flat wire motor and vehicle that can eliminate the phase difference between different branches, reduce losses, increase efficiency and improve service life.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A flat-wire motor stator includes a stator winding and a stator core. The stator core has multiple core slots circumferentially. The stator winding includes multi-phase windings, each phase winding including one or more sets of parallel winding lines. Each set of winding lines includes two or four parallel branches. Each branch includes multiple main coil groups and auxiliary coil groups alternately connected in series on the circumferential core slots of the stator core. The main coil group includes multiple coils that pass through two adjacent pairs of core slots and are connected in series. The coils in the middle layer span between two adjacent layers, and the innermost and outermost coils are located in the same layer. The auxiliary coil group includes at least two coils that pass through the same pair of core slots and are connected in series. These coils are located in the middle layer and span between two adjacent layers.

[0012] As a further improvement to the above technical solution:

[0013] The coil includes a coil body and a bent portion. The coil body includes two through-slot portions respectively inserted into two iron core slots and a connecting portion connected to one end of the two through-slot portions. The bent portion is located at the other end of the two through-slot portions and forms a welded end.

[0014] The two bent sections of the coil located in the middle layer bend inwards in the width direction of the coil body.

[0015] The two bends located in the innermost and outermost coils bend towards one side in the width direction of the coil body.

[0016] Each winding circuit includes two parallel branches, which are designated as the first branch A and the second branch B, respectively. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12, and the second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11-b12. The core slots are numbered sequentially starting from number 1, and each coil in each core slot is stacked in m layers along the depth direction of the core slot, where m is an even number greater than or equal to 4.

[0017] The pitch of A3-a4 and A5-a6 is y, where y is a positive integer;

[0018] The two through-slots of A1-a2 are located in core slots h and j+1 respectively, and are both located in the first layer along the slot opening direction of the core slot bottom. jh = y. The two through-slots of A3-a4 are located in core slots h+1 and j+1 respectively, and are located in the second and third layers along the slot opening direction of the core slot bottom, respectively. This continues until the two through-slots of A(2m-7)-a(2m-6) are located in core slots h+1 and j+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot bottom, respectively. A(2m- 5) The two through-slots of A(2m-4) are located in core slots h+1 and j respectively, and are both located in the m-th layer of the core slot bottom along the slot opening direction. The two through-slots of A(2m-3)-a(2m-2) are located in core slots j+y and j respectively, and are located in the m-1 and m-2 layers of the core slot bottom along the slot opening direction, respectively, until the two through-slots of A(4m-13)-a(4m-12) are located in core slots j+y and j respectively, and are located in the 3rd and 2nd layers of the core slot bottom along the slot opening direction, respectively.

[0019] The two through-slots of B1-b2 are located in core slots h+1 and j, respectively, and are both located in the first layer along the slot opening direction from the bottom of the core slot. The two through-slots of B3-b4 are located in core slots h and j, respectively, and are located in the second and third layers along the slot opening direction from the bottom of the core slot, respectively. This continues until the two through-slots of B(2m-7)-b(2m-6) are located in core slots h and j, respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction from the bottom of the core slot, respectively. The two through-slots of B(2m-5)-b(2m-4) are... The root through-slots are located in core slots h and j+1 respectively, and are both located in the m-th layer along the slot opening direction of the core slot. The two through-slots of B(2m-3)-b(2m-2) are located in core slots j+y+1 and j+1 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the core slot respectively, until the two through-slots of B(4m-13)-b(4m-12) are located in core slots j+y+1 and j+1 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the core slot respectively.

[0020] A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on.

[0021] B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on.

[0022] The coil connection sequence is from layer 1 to layer m, and then from layer m back to layer 1, repeating this circumferential cycle around the stator core.

[0023] The values ​​are m=6 and y=6.

[0024] Each winding circuit includes four parallel branches, which are designated as branch A, branch B, branch C, and branch D, respectively. Branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12. Branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11-b12. 2. The third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, and C11-c12; the fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, and D11-d12; the core slots are numbered sequentially starting from number 1, and each coil in each core slot is stacked in m layers along the depth direction of the core slot, where m is an even number greater than or equal to 4;

[0025] The pitch of A3-a4 and A5-a6 is y, where y is a positive integer;

[0026] The two through-slots of A1-a2 are located in core slots h and j+1 respectively, and are both located in the first layer along the slot opening direction of the core slot bottom. jh = y. The two through-slots of A3-a4 are located in core slots h+1 and j+1 respectively, and are located in the second and third layers along the slot opening direction of the core slot bottom, respectively. This continues until the two through-slots of A(2m-7)-a(2m-6) are located in core slots h+1 and j+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot bottom, respectively. A(2m- 5) The two through-slots of A(2m-4) are located in core slots h+1 and j respectively, and are both located in the m-th layer of the core slot bottom along the slot opening direction. The two through-slots of A(2m-3)-a(2m-2) are located in core slots j+y and j respectively, and are located in the m-1 and m-2 layers of the core slot bottom along the slot opening direction, respectively, until the two through-slots of A(4m-13)-a(4m-12) are located in core slots j+y and j respectively, and are located in the 3rd and 2nd layers of the core slot bottom along the slot opening direction, respectively.

[0027] The two through-slots of B1-b2 are located in core slots h+1 and j, respectively, and are both located in the first layer along the slot opening direction from the bottom of the core slot. The two through-slots of B3-b4 are located in core slots h and j, respectively, and are located in the second and third layers along the slot opening direction from the bottom of the core slot, respectively. This continues until the two through-slots of B(2m-7)-b(2m-6) are located in core slots h and j, respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction from the bottom of the core slot, respectively. The two through-slots of B(2m-5)-b(2m-4) are... The root through-slots are located in core slots h and j+1 respectively, and are both located in the m-th layer along the slot opening direction of the core slot. The two through-slots of B(2m-3)-b(2m-2) are located in core slots j+y+1 and j+1 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the core slot respectively, until the two through-slots of B(4m-13)-b(4m-12) are located in core slots j+y+1 and j+1 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the core slot respectively.

[0028] The two through-slots of C1-c2 are located in core slots h+zy and j+zy+1 respectively, and are both located in the first layer along the slot opening direction of the slot bottom. The two through-slots of C3-c4 are located in core slots h+zy+1 and j+zy+1 respectively, and are located in the second and third layers along the slot opening direction of the slot bottom, respectively. This continues until the two through-slots of C(2m-7)-c(2m-6) are located in core slots h+zy+1 and j+zy+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the slot bottom, respectively. The through-slots of C(2m-5)-c(2m-4)... Two through-slots are located in core slots h+zy+1 and j+zy, respectively, and are both located in the m-th layer along the slot opening direction of the core slot bottom. Two through-slots of C(2m-3)-c(2m-2) are located in core slots j+zy+y and j+zy, respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the core slot bottom, respectively, until two through-slots of C(4m-13)-c(4m-12) are located in core slots j+zy+y and j+zy, respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the core slot bottom, respectively. The z is an even number greater than or equal to 2.

[0029] The two through-slots of D1-d2 are located in core slots h+zy+1 and j+zy respectively, and are both located in the first layer along the slot opening direction of the core slot bottom. The two through-slots of D3-d4 are located in core slots h+zy and j+zy respectively, and are located in the second and third layers along the slot opening direction of the core slot bottom, respectively. This continues until the two through-slots of D(2m-7)-d(2m-6) are located in core slots h+zy and j+zy respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot bottom, respectively. The two through-slots of D(2m-5)-d(2m-4) are... The root through-slots are located in core slots h+zy and j+zy+1 respectively, and are both located in the m-th layer along the slot opening direction of the core slot bottom. The two through-slots of D(2m-3)-d(2m-2) are located in core slots j+zy+y+1 and j+zy+1 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the core slot bottom respectively, until the two through-slots of D(4m-13)-d(4m-12) are located in core slots j+zy+y+1 and j+zy+1 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the core slot bottom respectively.

[0030] A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on.

[0031] B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on.

[0032] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end, and so on.

[0033] D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end, and so on.

[0034] The coils of each branch are connected sequentially from the first layer to the mth layer, and then sequentially from the mth layer to the first layer, thus circulating around the stator core in a circumferential manner.

[0035] The given values ​​are m = 6, y = 6, and z = 4.

[0036] A flat wire motor, comprising the aforementioned flat wire motor stator.

[0037] A vehicle comprising the aforementioned motor.

[0038] Compared with the prior art, the advantages of the present invention are as follows:

[0039] This invention discloses a flat-wire motor stator, in which each branch includes multiple main coil groups and auxiliary coil groups alternately connected in series on the circumferential core slots of the stator core. The main coil group includes multiple coils threaded through two adjacent pairs of core slots and connected in series, wherein the coils in the middle layer span between adjacent layers, and the innermost and outermost coils are located on the same layer. The auxiliary coil group includes at least two coils threaded through the same pair of core slots and connected in series, located in the middle layer and spanning between adjacent layers. This improves the symmetry of the winding circuit and the overall symmetry, eliminates phase differences between different branches, reduces losses, increases efficiency, and extends service life. Furthermore, the two slot-passing portions of the innermost and outermost coils are located on the same layer, facilitating assembly and mass production.

[0040] The flat wire motor of the present invention includes the above-mentioned flat wire motor stator, and also has the advantages described above for the flat wire motor stator. Moreover, the overall structure is simple, the size is small, and the working stability is high.

[0041] The vehicle of the present invention, including the above-described flat wire motor, also has the advantages described in the flat wire motor stator above. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the connecting part facing upwards.

[0043] Figure 2 This is a first-view three-dimensional structural diagram of the main coil group of the flat wire motor stator of the present invention.

[0044] Figure 3 This is a second-view three-dimensional structural diagram of the main coil group of the flat wire motor stator of the present invention.

[0045] Figure 4 This is a schematic diagram of the installation structure of the main coil assembly of the flat wire motor stator of the present invention.

[0046] Figure 5 This is a schematic diagram of the innermost coil of the flat wire motor stator of the present invention.

[0047] Figure 6 This is a schematic diagram of the structure of the intermediate layer coil of the flat wire motor stator of the present invention.

[0048] Figure 7 This is a schematic diagram of the outermost coil of the flat wire motor stator of the present invention.

[0049] Figure 8 This is a schematic diagram of the stator winding arrangement of the flat wire motor stator of the present invention in Embodiment 1.

[0050] Figure 9 This is a schematic diagram of the stator winding arrangement of the flat wire motor stator of the present invention in Embodiment 2.

[0051] The labels in the diagram represent:

[0052] 1. Stator winding; 11. Coil body; 111. Through slot; 112. Connecting part; 12. Bending part; 2. Stator core; 3. Core slot. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Example 1:

[0055] Figures 1 to 8 This invention illustrates an embodiment of a flat wire motor stator. The flat wire motor stator includes a stator winding 1 and a stator core 2. The stator core 2 has a plurality of core slots 3 arranged circumferentially. The stator winding 1 includes multi-phase windings. Each phase winding includes one or more sets of winding lines connected in parallel. Each set of winding lines includes two or four parallel branches. Each branch includes a plurality of main coil groups and auxiliary coil groups that are alternately connected in series on the circumferential core slots of the stator core 2. The main coil group includes a plurality of coils that pass through two adjacent pairs of core slots 3 and are connected in series with each other. The coils in the middle layer are located across two adjacent layers, and the coils in the innermost and outermost layers are located in the same layer. The auxiliary coil group includes at least two coils that pass through the same pair of core slots 3 and are connected in series with each other. These coils are located in the middle layer and are located across two adjacent layers.

[0056] This flat-wire motor stator includes multiple main coil groups and auxiliary coil groups, alternately connected in series on the circumferential core slots of the stator core 2 in each branch. The main coil group includes multiple coils threaded through two adjacent pairs of core slots 3 and connected in series. The coils in the middle layer span between adjacent layers, while the innermost and outermost coils are located on the same layer. The auxiliary coil group includes at least two coils threaded through the same pair of core slots 3 and connected in series. This coil is located in the middle layer and spans between adjacent layers. This design improves the symmetry of the winding circuit and the overall symmetry, eliminates phase differences between different branches, reduces losses, increases efficiency, and extends service life. Furthermore, the two slot-passing portions 111 of the innermost and outermost coils are located on the same layer, facilitating assembly and mass production.

[0057] In this embodiment, as Figures 5 to 7 As shown, the coil includes a coil body 11 and a bending portion 12. The coil body 11 includes two through-slot portions 111 (arranged parallel to each other) that pass through two iron core slots respectively, and a connecting portion 112 connected to one end of the two through-slot portions 111. The bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. The connecting portion 112 is V-shaped or arc-shaped, making the coil body 11 U-shaped or V-shaped. Since all coils use the same type (U-shaped or V-shaped), dissimilar coils and bridging coils are eliminated, reducing the variety of coil types, thereby facilitating assembly and mass production, and improving production efficiency.

[0058] In this embodiment, as Figure 6 As shown, the two bent portions 12 of the coil located in the middle layer of the core slot 3 are bent inwards towards the width direction of the coil body 11. This facilitates the series connection of the middle layer coils.

[0059] In this embodiment, as Figure 5 and Figure 7 As shown, the two bent portions 12 of the innermost (i.e., the first layer from the bottom to the top of the slot) and outermost (the last layer from the bottom to the top of the slot) coils in the core slot 3 are bent towards one side of the width direction of the coil body 11. Specifically, the two bent portions 12 of the innermost coil in the core slot 3 are bent towards the left side of the width direction of the coil body 11, and the two bent portions 12 of the outermost coil in the core slot 3 are bent towards the right side of the width direction of the coil body 11. This facilitates the series connection of the coil groups of each branch. The two slot-penetrating portions 111 of the innermost and outermost coils in the core slot 3 are located in the same layer, which facilitates assembly and mass production, and improves production efficiency.

[0060] In this embodiment, the neutral points of each coil (such as a48 and b48) are connected by a copper busbar. The height of the copper busbar does not exceed the height of the coil welding end, which not only simplifies the structure but also reduces the height of the winding end, thereby reducing the size of the motor.

[0061] In this embodiment, each winding circuit includes two parallel branches. The two parallel branches of each winding circuit are respectively designated as the first branch A and the second branch B. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11-b12. The core slots 3 are numbered sequentially starting from number 1. Each coil in each core slot 3 is stacked in m layers in the depth direction of the core slot 3, where m is an even number greater than or equal to 4.

[0062] The pitches of A3-a4 and A5-a6 are y, where y is a positive integer;

[0063] The two through-slot sections 111 of A1-a2 are located in core slots h and j+1 respectively, and are both located in the first layer along the slot opening direction of the core slot 3, jh=y. The two through-slot sections 111 of A3-a4 are located in core slots h+1 and j+1 respectively, and are located in the second and third layers along the slot opening direction of the core slot 3, respectively. This continues until the two through-slot sections 111 of A(2m-7)-a(2m-6) are located in core slots h+1 and j+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3, respectively. The two through-slots 111 of A(2m-4) are located in the h+1 and j core slots 3 respectively, and are both located in the m-th layer of the core slot 3 along the slot opening direction. The two through-slots 111 of A(2m-3)-a(2m-2) are located in the j+y and j core slots 3 respectively, and are located in the m-1 and m-2 layers of the core slot 3 along the slot opening direction. This continues until the two through-slots 111 of A(4m-13)-a(4m-12) are located in the j+y and j core slots 3 respectively, and are located in the 3rd and 2nd layers of the core slot 3 along the slot opening direction.

[0064] The two through-slot sections 111 of B1-b2 are located in core slots h+1 and j respectively, and are both located in the first layer along the slot opening direction of the core slot 3. The two through-slot sections 111 of B3-b4 are located in core slots h and j respectively, and are located in the second and third layers along the slot opening direction of the core slot 3 respectively. This continues until the two through-slot sections 111 of B(2m-7)-b(2m-6) are located in core slots h and j respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3 respectively. The two through-slot sections 111 of B(2m-5)-b(2m-4) are... The root through-slots 111 are located in the h and j+1 iron core slots 3 respectively, and are both located in the m-th layer along the slot opening direction of the inner bottom of the iron core slot 3. The two through-slots 111 of B(2m-3)-b(2m-2) are located in the j+y+1 and j+1 iron core slots 3 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively, until the two through-slots 111 of B(4m-13)-b(4m-12) are located in the j+y+1 and j+1 iron core slots 3 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively.

[0065] A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on.

[0066] B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on.

[0067] The coil connection sequence is from layer 1 to layer m, and then from layer m back to layer 1, repeating this circumferential cycle around the stator core 2.

[0068] In this embodiment, m = 6, y = 6, h = 13, j = 19.

[0069] Specifically, taking a 48-slot, 8-pole motor with 2 branches and 6 winding layers as an example, the number of coil layers increases sequentially from the bottom of the slot to the top of the slot. The stator and phase winding wiring diagrams are as follows: Figure 1 and 8 As shown. Branch 1 (first branch A): Aa, Branch 2 (second branch B): Bb; The first group of coils are in pairs (e.g., Figure 5 As shown), the first group consists of concentric U-shaped coils with different spans, and both straight segments of the coil (slot 111) are located in the first layer; the second group of coils consists of two pairs of U-shaped coils with exactly the same span (as shown). Figure 6 As shown), the two straight segments of the coil are located in the second and third layers respectively; the third group of coils is also composed of U-shaped coils with identical spans in pairs, and the two straight segments of the coil are located in the fourth and fifth layers respectively; the fourth group of coils is composed of pairs (as shown). Figure 7 As shown), concentric U-shaped coils with different spans, and both straight segments of the coil are located in the sixth layer; for example, A1-a2 and B1-b2 together form concentric U-shaped coils with different spans, A3-a4 and B3-b4 are U-shaped coil groups with the same span, A5-a6 and B5-b6 are U-shaped coil groups with the same span, and A7-a8 and B7-b8 together form concentric U-shaped coils with different spans. The upper and lower edges (the two through-slots 111 are denoted as the upper and lower edges) of coils A1-a2 and B1-b2 in branches 1 and 2 are both located in the first layer. The pitch of A1-a2 is 7, and the pitch of B1-b2 is 5. Their shapes are as follows. Figure 5 As shown; the pitch of A3-a4 and B3-b4 is both 6, with the upper edge located in the 2nd layer and the lower edge located in the 3rd layer, and their shapes are as follows. Figure 6 As shown; the pitch of coils A5-a6 and B5-b6 is 6, with the upper edge located on the 4th layer and the lower edge on the 5th layer, and their shape is as follows. Figure 6 As shown; the upper and lower edges of coils A7-a8 and B7-b8 are located on the 6th layer, as... Figure 7As shown. Coils A1-a2 are connected to coils A3-a4 at the soldering end, coils A3-a4 are connected to coils A5-a6 at the soldering end, coils A5-a6 are connected to coils A7-a8 at the soldering end, and so on. The coil connection sequence is from layer 1 to layer 6 and then from layer 6 back to layer 1, repeating this cycle. Figure 8 As shown.

[0070] The motor consists of four different coil sets. The first layer of coils has the same bend direction, while the middle two sets have opposite bend directions. These four coil sets are then welded together to form a winding (the main coil set), as shown below. Figure 2 and Figure 3 As shown, each motor has 24 sets of windings, which are transposed by coils with different pitches to eliminate the phase difference between different branches and ensure that each branch is completely symmetrical.

[0071] The stator of this flat-wire motor consists entirely of U-shaped coils, eliminating non-standard coils and bridging coils, which facilitates mass production; it also reduces the variety of U-shaped coils, making mass production easier. The busbar structure is simplified, resulting in a compact design.

[0072] Example 2:

[0073] Figure 9 This invention illustrates another embodiment of the flat wire motor stator. The flat wire motor stator includes a stator winding 1 and a stator core 2. The stator core 2 has a plurality of core slots 3 arranged circumferentially. The stator winding 1 includes multi-phase windings. Each phase winding includes one or more sets of winding lines connected in parallel. Each set of winding lines includes two or four parallel branches. Each branch includes a plurality of main coil groups and auxiliary coil groups that are alternately connected in series on the circumferential core slots of the stator core 2. The main coil group includes a plurality of coils that pass through two adjacent pairs of core slots 3 and are connected in series with each other. The coils in the middle layer are connected across two adjacent layers, and the coils in the innermost and outermost layers are located in the same layer. The auxiliary coil group includes at least two coils that pass through the same pair of core slots 3 and are connected in series with each other. These coils are located in the middle layer and are connected across two adjacent layers.

[0074] This flat-wire motor stator includes multiple main coil groups and auxiliary coil groups, alternately connected in series on the circumferential core slots of the stator core 2 in each branch. The main coil group includes multiple coils threaded through two adjacent pairs of core slots 3 and connected in series. The coils in the middle layer span between adjacent layers, while the innermost and outermost coils are located on the same layer. The auxiliary coil group includes at least two coils threaded through the same pair of core slots 3 and connected in series. This coil is located in the middle layer and spans between adjacent layers. This design improves the symmetry of the winding circuit and the overall symmetry, eliminates phase differences between different branches, reduces losses, increases efficiency, and extends service life. Furthermore, the two slot-passing portions 111 of the innermost and outermost coils are located on the same layer, facilitating assembly and mass production.

[0075] In this embodiment, as Figures 5 to 7 As shown, the coil includes a coil body 11 and a bending portion 12. The coil body 11 includes two through-slot portions 111 (arranged parallel to each other) that pass through two iron core slots respectively, and a connecting portion 112 connected to one end of the two through-slot portions 111. The bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. The connecting portion 112 is V-shaped or arc-shaped, making the coil body 11 U-shaped or V-shaped. Since all coils use the same type (U-shaped or V-shaped), dissimilar coils and bridging coils are eliminated, reducing the variety of coil types, thereby facilitating assembly and mass production, and improving production efficiency.

[0076] In this embodiment, as Figure 6 As shown, the two bent portions 12 of the coil located in the middle layer of the core slot 3 are bent inwards towards the width direction of the coil body 11. This facilitates the series connection of the middle layer coils.

[0077] In this embodiment, as Figure 5 and Figure 7 As shown, the two bent portions 12 of the innermost (i.e., the first layer from the bottom to the top of the slot) and outermost (the last layer from the bottom to the top of the slot) coils in the core slot 3 are bent towards one side of the width direction of the coil body 11. Specifically, the two bent portions 12 of the innermost coil in the core slot 3 are bent towards the left side of the width direction of the coil body 11, and the two bent portions 12 of the outermost coil in the core slot 3 are bent towards the right side of the width direction of the coil body 11. This facilitates the series connection of the coil groups of each branch. The two slot-penetrating portions 111 of the innermost and outermost coils in the core slot 3 are located in the same layer, which facilitates assembly and mass production, and improves production efficiency.

[0078] In this embodiment, the neutral points of each coil (such as a24, b24, c24, d24) are connected by a copper busbar. The height of the copper busbar does not exceed the height of the coil welding end, which not only simplifies the structure but also reduces the height of the winding end, thereby reducing the size of the motor.

[0079] In this embodiment, each winding circuit includes four parallel branches. The four parallel branches of each winding circuit are respectively designated as branch A, branch B, branch C, and branch D. Branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12. Branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11. -b12, the third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, and the fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, D11-d12; the iron core slots 3 are numbered sequentially starting from number 1, and each coil in each iron core slot 3 is stacked in m layers in the depth direction of the iron core slot 3, where m is an even number greater than or equal to 4;

[0080] The pitches of A3-a4 and A5-a6 are y, where y is a positive integer;

[0081] The two through-slot sections 111 of A1-a2 are located in core slots h and j+1 respectively, and are both located in the first layer along the slot opening direction of the core slot 3, jh=y. The two through-slot sections 111 of A3-a4 are located in core slots h+1 and j+1 respectively, and are located in the second and third layers along the slot opening direction of the core slot 3, respectively. This continues until the two through-slot sections 111 of A(2m-7)-a(2m-6) are located in core slots h+1 and j+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3, respectively. The two through-slots 111 of A(2m-4) are located in the h+1 and j core slots 3 respectively, and are both located in the m-th layer of the core slot 3 along the slot opening direction. The two through-slots 111 of A(2m-3)-a(2m-2) are located in the j+y and j core slots 3 respectively, and are located in the m-1 and m-2 layers of the core slot 3 along the slot opening direction. This continues until the two through-slots 111 of A(4m-13)-a(4m-12) are located in the j+y and j core slots 3 respectively, and are located in the 3rd and 2nd layers of the core slot 3 along the slot opening direction.

[0082] The two through-slot sections 111 of B1-b2 are located in core slots h+1 and j respectively, and are both located in the first layer along the slot opening direction of the core slot 3. The two through-slot sections 111 of B3-b4 are located in core slots h and j respectively, and are located in the second and third layers along the slot opening direction of the core slot 3 respectively. This continues until the two through-slot sections 111 of B(2m-7)-b(2m-6) are located in core slots h and j respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3 respectively. The two through-slot sections 111 of B(2m-5)-b(2m-4) are... The root through-slots 111 are located in the h and j+1 iron core slots 3 respectively, and are both located in the m-th layer along the slot opening direction of the inner bottom of the iron core slot 3. The two through-slots 111 of B(2m-3)-b(2m-2) are located in the j+y+1 and j+1 iron core slots 3 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively, until the two through-slots 111 of B(4m-13)-b(4m-12) are located in the j+y+1 and j+1 iron core slots 3 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively.

[0083] The two through-slot sections 111 of C1-c2 are located in core slots h+zy and j+zy+1 respectively, and are both located in the first layer along the slot opening direction of the core slot 3. The two through-slot sections 111 of C3-c4 are located in core slots h+zy+1 and j+zy+1 respectively, and are located in the second and third layers along the slot opening direction of the core slot 3 respectively. This continues until the two through-slot sections 111 of C(2m-7)-c(2m-6) are located in core slots h+zy+1 and j+zy+1 respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3 respectively. C(2m-5)-c(2m-4) The two through-slots 111 are located in the h+zy+1 and j+zy iron core slots 3 respectively, and are both located in the m-th layer along the slot opening direction of the bottom of the iron core slot 3. The two through-slots 111 of C(2m-3)-c(2m-2) are located in the j+zy+y and j+zy iron core slots 3 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the bottom of the iron core slot 3 respectively, until the two through-slots 111 of C(4m-13)-c(4m-12) are located in the j+zy+y and j+zy iron core slots 3 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the bottom of the iron core slot 3 respectively. z is an even number greater than or equal to 2.

[0084] The two through-slot sections 111 of D1-d2 are located in core slots h+zy+1 and j+zy respectively, and are both located in the first layer along the slot opening direction of the core slot 3. The two through-slot sections 111 of D3-d4 are located in core slots h+zy and j+zy respectively, and are located in the second and third layers along the slot opening direction of the core slot 3 respectively. This continues until the two through-slot sections 111 of D(2m-7)-d(2m-6) are located in core slots h+zy and j+zy respectively, and are located in the (m-2) and (m-1) layers along the slot opening direction of the core slot 3 respectively. The two through-slot sections 111 of D(2m-5)-d(2m-4) are... The root through-slots 111 are located in the h+zy and j+zy+1 iron core slots 3 respectively, and are both located in the m-th layer along the slot opening direction of the inner bottom of the iron core slot 3. The two through-slots 111 of D(2m-3)-d(2m-2) are located in the j+zy+y+1 and j+zy+1 iron core slots 3 respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively, until the two through-slots 111 of D(4m-13)-d(4m-12) are located in the j+zy+y+1 and j+zy+1 iron core slots 3 respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot 3 respectively.

[0085] A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on.

[0086] B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on.

[0087] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end, and so on.

[0088] D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end, and so on.

[0089] The coil connection sequence of each branch is from layer 1 to layer m, and then from layer m back to layer 1, thus circulating around the stator core 2 in a circumferential manner.

[0090] In this embodiment, m = 6, y = 6, z = 4. h = number 13, j = 19. The number of core slots 3 is 48.

[0091] The stator of this flat wire motor consists entirely of U-shaped coils, eliminating non-standard coils and bridging coils, which facilitates mass production; reducing the variety of U-shaped coils also facilitates mass production manufacturing.

[0092] Example 3:

[0093] The flat wire motor of this embodiment includes the flat wire motor stator of Embodiment 1 or Embodiment 2. The flat wire motor of the present invention also includes the flat wire motor stator as described above, and also has the advantages described above for the flat wire motor stator, and has a simple overall structure, small size, and high working stability.

[0094] Example 4:

[0095] The vehicle of this embodiment includes the flat wire motor of Embodiment 3. The vehicle of the present invention also includes the flat wire motor stator as described above, and also has the advantages described above for the flat wire motor stator.

[0096] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A flat wire motor stator, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) is provided with a plurality of core slots (3) in the circumferential direction, and the stator winding (1) comprises a multi-phase winding, characterized in that: Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes two parallel branches. Each branch includes multiple main coil groups and secondary coil groups that are alternately connected in series on the circumferential core slots of the stator core (2). The main coil group includes multiple coils that pass through two adjacent pairs of core slots (3) and are connected in series. The coils in the middle layer of the core slot (3) are connected across two adjacent layers. The coils in the innermost and outermost layers of the core slot (3) are located on the same layer. The secondary coil group includes at least two coils that pass through the same pair of core slots (3) and are connected in series. The coils of the secondary coil group are located in the middle layer and are connected across two adjacent layers. Each of the winding lines has two parallel branches, designated as the first branch A and the second branch B. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11-b12. The core slots (3) are numbered sequentially starting from number 1. Each coil in each core slot (3) is stacked in m layers in the depth direction of the core slot (3), where m is an even number greater than or equal to 4. The pitch of A3-a4 and A5-a6 is y, where y is a positive integer; The two through-slots (111) of A1-a2 are located in the h and j+1 iron core slots (3) respectively, and are both located in the first layer along the slot opening direction of the inner bottom of the iron core slot (3), where jh=y. The two through-slots (111) of A3-a4 are located in the h+1 and j+1 iron core slots (3) respectively, and are located in the second and third layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, until the two through-slots (111) of A(2m-7)-a(2m-6) are located in the h+1 and j+1 iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. 5) The two through-slots (111) of A(2m-4) are located in the h+1 and j core slots (3) respectively, and are both located in the m layer of the core slot (3) along the slot opening direction. The two through-slots (111) of A(2m-3)-a(2m-2) are located in the j+y and j core slots (3) respectively, and are located in the m-1 and m-2 layers of the core slot (3) along the slot opening direction. Until the two through-slots (111) of A(4m-13)-a(4m-12) are located in the j+y and j core slots (3) respectively, and are located in the 3rd and 2nd layers of the core slot (3) along the slot opening direction. The two through-slot sections (111) of B1-b2 are located in core slots h+1 and j respectively, and are both located in the first layer along the slot opening direction of the core slot (3). The two through-slot sections (111) of B3-b4 are located in core slots h and j respectively, and are located in the second and third layers along the slot opening direction of the core slot (3) respectively. This continues until the two through-slot sections (111) of B(2m-7)-b(2m-6) are located in core slots h and j respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the core slot (3) respectively. The two through-slot sections (111) of B(2m-5)-b(2m-4) are located in core slots h and j respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the core slot (3) respectively. The root through-slot (111) is located in the h and j+1 iron core slots (3) respectively, and is located in the m layer along the slot opening direction of the inner bottom of the iron core slot (3). The two through-slots (111) of B (2m-3)-b (2m-2) are located in the j+y+1 and j+1 iron core slots (3) respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, until the two through-slots (111) of B (4m-13)-b (4m-12) are located in the j+y+1 and j+1 iron core slots (3) respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on. B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on. The coil connection sequence is from the first layer to the m layer, and then from the m layer to the first layer, and so on, circumferentially cycling around the stator core (2).

2. The flat wire motor stator according to claim 1, characterized in that: The coil includes a coil body (11) and a bent portion (12). The coil body (11) includes two slotted portions (111) that pass through two iron core slots (3) respectively and a connecting portion (112) connected to one end of the two slotted portions (111). The bent portion (12) is located at the other end of the two slotted portions (111) and forms a welding end.

3. The flat wire motor stator according to claim 2, characterized in that: The two bent portions (12) of the coil located in the middle layer are bent inward toward the width direction of the coil body (11).

4. The flat wire motor stator according to claim 3, characterized in that: The two bends (12) located in the innermost and outermost coils bend toward one side of the width direction of the coil body (11).

5. The flat wire motor stator according to claim 1, characterized in that: The values ​​are m=6 and y=6.

6. A flat wire motor stator, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) is provided with a plurality of core slots (3) in the circumferential direction, and the stator winding (1) comprises a multi-phase winding, characterized in that: Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes four parallel branches. Each branch includes multiple main coil groups and secondary coil groups that are alternately connected in series on the circumferential core slots of the stator core (2). The main coil group includes multiple coils that pass through two adjacent pairs of core slots (3) and are connected in series. The coils in the middle layer of the core slot (3) are connected across two adjacent layers. The coils in the innermost and outermost layers of the core slot (3) are located on the same layer. The secondary coil group includes at least two coils that pass through the same pair of core slots (3) and are connected in series. The coils of the secondary coil group are located in the middle layer and are connected across two adjacent layers. The four parallel branches of each winding line are respectively designated as branch A, branch B, branch C, and branch D. Branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, and A11-a12. Branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, and B11-b12. Branch C includes coils... C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, the fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, D11-d12; the iron core slots (3) are numbered sequentially starting from number 1, and each coil in each iron core slot (3) is stacked in m layers in the depth direction of the iron core slot (3), where m is an even number greater than or equal to 4; The pitch of A3-a4 and A5-a6 is y, where y is a positive integer; The two through-slots (111) of A1-a2 are located in the h and j+1 iron core slots (3) respectively, and are both located in the first layer along the slot opening direction of the inner bottom of the iron core slot (3), where jh=y. The two through-slots (111) of A3-a4 are located in the h+1 and j+1 iron core slots (3) respectively, and are located in the second and third layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, until the two through-slots (111) of A(2m-7)-a(2m-6) are located in the h+1 and j+1 iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. 5) The two through-slots (111) of A(2m-4) are located in the h+1 and j core slots (3) respectively, and are both located in the m layer of the core slot (3) along the slot opening direction. The two through-slots (111) of A(2m-3)-a(2m-2) are located in the j+y and j core slots (3) respectively, and are located in the m-1 and m-2 layers of the core slot (3) along the slot opening direction. Until the two through-slots (111) of A(4m-13)-a(4m-12) are located in the j+y and j core slots (3) respectively, and are located in the 3rd and 2nd layers of the core slot (3) along the slot opening direction. The two through-slot sections (111) of B1-b2 are located in core slots h+1 and j respectively, and are both located in the first layer along the slot opening direction of the core slot (3). The two through-slot sections (111) of B3-b4 are located in core slots h and j respectively, and are located in the second and third layers along the slot opening direction of the core slot (3) respectively. This continues until the two through-slot sections (111) of B(2m-7)-b(2m-6) are located in core slots h and j respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the core slot (3) respectively. The two through-slot sections (111) of B(2m-5)-b(2m-4) are located in core slots h and j respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the core slot (3) respectively. The root through-slot (111) is located in the h and j+1 iron core slots (3) respectively, and is located in the m layer along the slot opening direction of the inner bottom of the iron core slot (3). The two through-slots (111) of B (2m-3)-b (2m-2) are located in the j+y+1 and j+1 iron core slots (3) respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, until the two through-slots (111) of B (4m-13)-b (4m-12) are located in the j+y+1 and j+1 iron core slots (3) respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. The two through-slots (111) of C1-c2 are located in the h+zy and j+zy+1 iron core slots (3) respectively, and are both located in the first layer along the slot opening direction of the inner bottom of the iron core slot (3). The two through-slots (111) of C3-c4 are located in the h+zy+1 and j+zy+1 iron core slots (3) respectively, and are located in the second and third layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. This continues until the two through-slots (111) of C(2m-7)-c(2m-6) are located in the h+zy+1 and j+zy+1 iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. The two through-slots (111) of C(2m-5)-c(2m-4) are located in the h+zy+1 and j+zy+1 iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. Two through-slots (111) are located in the h+zy+1 and j+zy iron core slots (3) respectively, and are both located in the m-th layer along the slot opening direction of the inner bottom of the iron core slot (3). The two through-slots (111) of C(2m-3)-c(2m-2) are located in the j+zy+y and j+zy iron core slots (3) respectively, and are located in the m-1 and m-2 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, until the two through-slots (111) of C(4m-13)-c(4m-12) are located in the j+zy+y and j+zy iron core slots (3) respectively, and are located in the 3rd and 2nd layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively, where z is an even number greater than or equal to 2; The two through-slots (111) of D1-d2 are located in the h+zy+1 and j+zy iron core slots (3) respectively, and are both located in the first layer along the slot opening direction of the inner bottom of the iron core slot (3). The two through-slots (111) of D3-d4 are located in the h+zy and j+zy iron core slots (3) respectively, and are located in the second and third layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. Until the two through-slots (111) of D(2m-7)-d(2m-6) are located in the h+zy and j+zy iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. The two through-slots (111) of D(2m-5)-d(2m-4) are located in the h+zy and j+zy iron core slots (3) respectively, and are located in the m-2 and m-1 layers along the slot opening direction of the inner bottom of the iron core slot (3) respectively. The root through-slot (111) is located in the h+zy and j+zy+1 iron core slots (3) respectively, and is located in the m-th layer of the inner bottom of the iron core slot (3) along the slot opening direction. The two through-slots (111) of D(2m-3)-d(2m-2) are located in the j+zy+y+1 and j+zy+1 iron core slots (3) respectively, and are located in the m-1 and m-2 layers of the inner bottom of the iron core slot (3) along the slot opening direction, until the two through-slots (111) of D(4m-13)-d(4m-12) are located in the j+zy+y+1 and j+zy+1 iron core slots (3) respectively, and are located in the 3rd and 2nd layers of the inner bottom of the iron core slot (3) along the slot opening direction. A1-a2 are connected to A3-a4 at the welding end, A3-a4 coil is connected to A5-a6 at the welding end, A5-a6 is connected to A7-a8 at the welding end, A7-a8 is connected to A9-a10 at the welding end, A9-a10 is connected to A11-a12 at the welding end, and so on. B1-b2 is connected to B3-b4 at the welding end, B3-b4 coil is connected to B5-b6 at the welding end, B5-b6 is connected to B7-b8 at the welding end, B7-b8 is connected to B9-b10 at the welding end, B9-b10 is connected to B11-b12 at the welding end, and so on. C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end, and so on. D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end, and so on. The coil connection sequence of each branch is from the first layer to the m layer, and then from the m layer to the first layer, thus circulating around the stator core (2) in a circumferential manner.

7. The flat wire motor stator according to claim 6, characterized in that: The values ​​are m=6, y=6, and z=4.

8. A flat wire motor, characterized in that: The flat wire motor stator includes any one of claims 1 to 7.

9. A vehicle, characterized in that: Includes the motor as described in claim 8.

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