Flat wire motor winding

Abstract

The invention provides a flat wire motor winding which comprises a stator body and three coil groups, any coil group is provided with three parallel branches, any branch comprises a forward winding and a corresponding reverse winding, any forward winding circulates according to a first span group in the arrangement direction of stator grooves and is continuously wound in the stator grooves, and any reverse winding circulates according to a second span group in the arrangement direction of the stator grooves. The winding layer is circularly and continuously wound on the winding layer according to a first layer distance group along the arrangement direction of the winding layer; any reverse winding circulates along the arrangement direction of the stator slots according to a second span group and is continuously wound in the stator slots, and circulates along the arrangement direction of the winding layers according to a second layer pitch group and is continuously wound on the winding layers; the flat wire motor winding provided by the embodiment of the invention needs two types of wire shapes when being wound along the arrangement direction of the stator slots and the arrangement direction of the winding layers, so that the production difficulty can be reduced, the potential balance of each branch can be maintained, and each forward winding and each reverse winding can be continuously wound from the initial slot position to the final slot position respectively, so that the production efficiency is improved. And the production process can be simplified.

Description

Technical Field

[0001] The present application relates to the field of components of motor windings arranged in slots, in particular to a flat wire motor winding. Background Art

[0002] Stator windings are mainly divided into two types: round wire and flat wire. Compared with traditional round wire windings, flat wire windings can significantly improve the efficiency, power density, torque density and other key performance indicators of the motor. In the current market, the mainstream flat wire windings mostly use Hairpin line shape. However, this structure has some challenges: on the one hand, due to the different line shapes of each parallel branch, as the number of parallel branches increases, the number of line shapes required for motor winding processing also increases, which not only makes the production process more complicated, but also increases the difficulty of manufacturing; on the other hand, each coil in the Hairpin winding usually needs to be assembled through multiple welding. Since the quality of each welding point is directly related to the operating life of the entire motor, the more welding points there are, the higher the probability and risk of failure, which makes it difficult to effectively guarantee the consistency and reliability of the product. Summary of the invention

[0003] The embodiment of the present application provides a flat wire motor winding, which is used to solve the problems of complex flat wire winding production process and insufficient product reliability.

[0004] In some embodiments, a flat wire motor winding is provided, comprising a stator body and three coil groups, wherein the stator body comprises m winding layers, wherein m=2n+1, n is a positive integer and n≥1, the stator body has 54 stator slots along its circumference and any of the stator slots forms a slot position in any of the winding layers; any of the coil groups has three parallel branches, and any of the branches comprises a forward winding and a corresponding reverse winding, and any of the forward windings is circulated and continuously wound in the stator slots according to a first span group along the stator slot arrangement direction, and is circulated and continuously wound in the winding layer according to a first layer spacing group along the winding layer arrangement direction. layer; any of the reverse windings is cyclically and continuously wound in the stator slots according to the second span group along the stator slot arrangement direction, and is cyclically and continuously wound on the winding layer according to the second layer distance group along the winding layer arrangement direction; the first span group is the number of stator slots spaced sequentially when each of the forward windings is wound in one cycle; the second span group is the number of stator slots spaced sequentially when each of the reverse windings is wound in one cycle; the first layer distance group is the number of winding layers spaced sequentially when each of the forward windings is wound in one cycle; the second span group is the number of winding layers spaced sequentially when each of the reverse windings is wound in one cycle.

[0005] In some embodiments, the three coil groups are respectively a first phase line group, a second phase line group and a third phase line group, the first phase line group includes a first U-phase branch, a second U-phase branch and a third U-phase branch; the second phase line group includes a first V-phase branch, a second V-phase branch and a third V-phase branch; the third phase line group includes a first W-phase branch, a second W-phase branch and a third W-phase branch; wherein,

[0006] The coil shapes of the first U-phase branch, the first V-phase branch and the first W-phase branch are the same; the coil shapes of the second U-phase branch, the second V-phase branch and the second W-phase branch are the same; the coil shapes of the third U-phase branch, the third V-phase branch and the third W-phase branch are the same.

[0007] In some embodiments, the first phase line group and the second phase line group are integrally translated by three stator slots along a first direction to form the second phase line group, and the second phase line group is integrally translated by three stator slots along the first direction to form a third phase line group, and the first direction is the arrangement direction of the stator slots.

[0008] In some embodiments, the number of stator slots sequentially spaced when each of the forward windings is wound in one cycle is k1, k2, k3, k4, k5, k6, wherein k1, k2, k3, k4, k5 and k6 are positive integers, k1+k2+k3+k4+k5+k6=54;

[0009] The number of stator slots spaced sequentially when each reverse winding is wound in one cycle is j1, j2, j3, j4, j5, j6, wherein j1, j2, j3, j4, j5 and j6 are positive integers, j1+j2+j3+j4+j5+j6=54.

[0010] In some embodiments, the number of winding layers of each forward winding in one cycle is q1, q2, q3, q4, q5, q6, wherein q1, q2, q3, q4, q5 and q6 are natural numbers, q1+q2+q3+q4+q5+q6=2;

[0011] The number of winding layers spaced sequentially when each reverse winding is wound in one cycle is p1, p2, p3, p4, p5, p6, where p1, p2, p3, p4, p5 and p6 are natural numbers, p1+p2+p3+p4+p5+p6=2.

[0012] In some embodiments, the starting slots of the forward windings of the three parallel branches in the same coil group are arranged in sequence and adjacent to each other along the stator slot arrangement direction. When the number of stator slots between the starting slot and the next slot of the forward winding of one of the parallel branches is ki, i is any integer from 1 to 6,

[0013] If 0<i+4<6, the number of stator slots between the positive windings of adjacent parallel branches from the starting slot to the next slot is k(i+4);

[0014] If i+4>6, the number of stator slots between the positive windings of adjacent parallel branches from the starting slot to the next slot is k(i+2).

[0015] In some embodiments, the winding layers of the stator body are sequentially arranged from inside to outside as 1 to m, the stator slot numbers are sequentially arranged from 1 to 54, and the actual coordinates of any slot of the stator body are [x, y], wherein x represents the winding layer number, x is any one of the winding layers 1 to m, and y represents the stator slot number, y is any one of 1 to 54;

[0016] The actual coordinates of any of the slots have corresponding nominal coordinates [a, b], where a represents the nominal number of the winding layer, b represents the nominal number of the stator slot, a is an integer greater than 0 and less than or equal to m, and b is an integer; x of any of the actual numbers of the winding layer is equal to the corresponding nominal number of the winding layer a; when the nominal number of the stator slot b≤0 or b>54, the corresponding actual number of the stator slot y=b+54t, and t takes an integer when 0<y≤54;

[0017] When the forward winding is wound from the nominal coordinates [a1, b1] of the slot, if the number of stator slots separated by the forward winding when it reaches the next slot is k1, the nominal serial numbers of the stator slots passed by the forward winding in one cycle are:

[0018] b1, b1-k1, b1-k1-k2, b1-k1-k2-k3, b1-k1-k2-k3-k4, b1-k1-k2-k3-k4-k5, b1-k1-k2-k3-k4-k5-k6;

[0019] If the number of winding layers between which the forward winding reaches the next slot is q1, the nominal numbers of the stator slots that the forward winding passes through in one cycle are:

[0020] a1-q1, a1-q1-q2, a1-q, a1-q1-q2-q3, a1-q1-q2-q3-q4, a1-q1-q2-q3-q4-q5, a1-q1-q2-q3-q4-q5-q6.

[0021] In some embodiments, when the reverse winding is wound from the nominal coordinates of the slot [a2, b2], if the number of stator slots separated by the reverse winding when reaching the next slot is j1, the nominal sequence numbers of the stator slots passed by the forward winding in one cycle are:

[0022] b2, b2+j1, b2+j1+j2, b2+j1+j2+j3, b2+j1+j2+j3+j4, b2+j1+j2+j3+j4+j5, b2+j1+j2+j3+j4+j5+j6;

[0023] If the number of winding layers between which the reverse winding reaches the next slot is p1, the nominal numbers of the stator slots that the reverse winding passes through in one cycle are:

[0024] a2, a2+p1, a2+p1+p2, a2+p1+p2+p3, a2+p1+p2+p3+p4, a2+p1+p2+p3+p4+p5, a2+p1+p2+p3+p4+p5+p6.

[0025] In some embodiments, when the forward winding is wound from the outermost layer, q1=q2=q3=q4=0, q5=q6=1;

[0026] When the reverse winding is wound from the first layer, p1=1, p2=p3=p4=p5=0, and p6=1.

[0027] In some embodiments, k1=7, k2=9, k3=10, k4=9, k5=10, k6=9;

[0028] j1=7, j2=9, j3=10, j4=9, j5=10, j6=9.

[0029] In some embodiments, any of the forward windings is continuously wound along the forward direction of the current from the mth layer according to the first span group and the first layer distance group until a=0 in the nominal coordinate and starts to be wound in the reverse direction, and any of the reverse windings is continuously wound from the 1st layer according to the second span group and the second layer distance group until a=m+1 in the nominal coordinate and stops.

[0030] In some embodiments, when any of the forward windings is continuously wound according to the first span group to the nominal coordinate of the slot position where a=0, if the corresponding actual serial number of the stator slot is Zb, where Zb is any integer value from 1 to 54, then the actual coordinates of the starting slot of the reverse winding corresponding to the forward winding are [1, Zb].

[0031] In some embodiments, each of the forward windings comprises an inlet terminal and a first connection terminal, each of the forward windings is introduced from the outermost layer of the m winding layers and led out from the innermost layer of the winding layers along the forward direction of the current, and the current flows in the forward direction from the inlet terminal to the first connection terminal;

[0032] Each of the reverse windings comprises an outlet terminal and a second connection terminal, each of the reverse windings is introduced from the innermost layer of the m winding layers and led out from the outermost layer of the winding layers along the positive direction of the current, and the positive direction of the current flows from the second connection terminal to the outlet terminal;

[0033] The first connection end of each forward winding is welded to the second connection end of the corresponding reverse winding.

[0034] In some embodiments, the input ends of the three coil groups are respectively connected to a U-phase power supply, a V-phase power supply, and a W-phase power supply, and the output ends of the three coil groups are connected together through a bus.

[0035] In some embodiments, each of the inlet terminals and the corresponding outlet terminals are located on the same end side of the stator body.

[0036] In the flat wire motor winding provided in the embodiment of the present application, on the one hand, since each forward winding is wound according to the first span group along the stator slot arrangement direction and is wound according to the first layer spacing group along the winding layer arrangement direction, the linear shapes of each forward winding in the three coil groups along the stator slot arrangement direction are the same, and the linear shapes of each forward winding along the winding layer arrangement direction are also the same. Similarly, the linear shapes of each reverse winding along the stator slot arrangement direction are the same, and the linear shapes of each reverse winding along the winding layer arrangement direction are also the same. That is, in this embodiment, two linear shapes are required when winding along the stator slot arrangement direction and the winding layer arrangement direction, respectively, which can reduce the difficulty of production and keep the potential balance of each branch at the same time.

[0037] On the other hand, in this embodiment, each forward winding and each reverse winding can be wound continuously from the starting slot to the end slot, which can simplify the production process. And the coil of any branch can be formed by simply connecting the end of the forward winding with the beginning of the corresponding reverse winding, which can reduce the number of welding points, thereby ensuring the consistency and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a schematic diagram of the structure of the flat wire motor winding in some embodiments of the present application;

[0040] Figure 2 yes Figure 1 Schematic diagram of the distribution of stator slots and winding layers in the embodiment;

[0041] Figure 3 yes Figure 1 Schematic diagram of the end connection of the flat wire motor winding in the embodiment;

[0042] Figure 4 is a schematic diagram of the winding principle of one branch of a coil group in some embodiments of the present application;

[0043] Figure 5 yes Figure 4 A schematic diagram of the winding principle of another branch of the same coil group in the embodiment;

[0044] Figure 6 yes Figure 4 A schematic diagram of the winding principle of another branch of the same coil group in the embodiment;

[0045] Figure 7 yes Figure 4 Schematic diagram of the arrangement relationship of three coil groups in the stator slots in the embodiment.

[0046] In the above drawings:

[0047] 10. stator body; 11. winding layer; 12. stator slot;

[0048] 20, coil assembly; 201, branch circuit; 2011, first connection end; 2012, second connection end; 2013, outlet end; 2014, inlet end;

[0049] 21, first phase line group; 211, first U-phase branch; 212, second U-phase branch; 213, third U-phase branch; 22, second phase line group; 221, first V-phase branch; 222, second V-phase branch; 223, third V-phase branch; 23, third phase line group; 231, first W-phase branch; 232, second W-phase branch; 233, third W-phase branch;

[0050] 31. U-phase power supply; 32. V-phase power supply; 33. W-phase power supply. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0052] In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products or equipment.

[0053] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of the flat wire motor winding in some embodiments of the present application; Figure 2 yes Figure 1 Schematic diagram of the distribution of stator slots and winding layers in the embodiment; Figure 3 yes Figure 1 Schematic diagram of the end connection of the flat wire motor winding in the embodiment.

[0054] The embodiment of the present application provides a flat wire motor winding, including a stator body 10 and three coil groups 20, wherein the stator body 10 includes m winding layers 11, wherein m=2n+1, n is a positive integer and n≥1, the stator body 10 has 54 stator slots 12 along its circumference and any stator slot 12 forms a slot position in any winding layer 11; any coil group 20 has three parallel branches 201, and any branch 201 is connected to the stator body 10. 01 include a forward winding and a corresponding reverse winding. Any forward winding circulates along the arrangement direction of the stator slots 12 according to the first span group and is continuously wound in the stator slots 12, and circulates along the arrangement direction of the winding layer 11 according to the first layer distance group and is continuously wound on the winding layer 11; any reverse winding circulates along the arrangement direction of the stator slots 12 according to the second span group and is continuously wound in the stator slots 12, and circulates along the arrangement direction of the winding layer 11 according to the second layer distance group and is continuously wound on the winding layer 11.

[0055] The first span group is the number of stator slots 12 spaced apart in sequence when each forward winding is wound in one cycle; the second span group is the number of stator slots 12 spaced apart in sequence when each reverse winding is wound in one cycle; the first layer distance group is the number of winding layers 11 spaced apart in sequence when each forward winding is wound in one cycle; the second span group is the number of winding layers 11 spaced apart in sequence when each reverse winding is wound in one cycle.

[0056] The number of stator slots 12 between the starting slot position and the next slot position of each forward winding may be different, and each forward winding may be periodically and continuously wound starting from different values ​​in the first span group.

[0057] Likewise, the number of stator slots 12 between the starting slot position and the next slot position of each reverse winding may be different, and each forward winding may be periodically and continuously wound starting from different values ​​in the second span group.

[0058] In some embodiments, the number of winding layers 11 between the starting slot and the next slot of each forward winding is the same, and each forward winding can be periodically and continuously wound from the same value in the first layer spacing group. The number of winding layers 11 between the starting slot and the next slot of each reverse winding is the same, and each reverse winding can be periodically and continuously wound from the same value in the second layer spacing group.

[0059] See also Figures 4 to 6 , Figure 4 is a schematic diagram of the winding principle of one branch of a coil group in some embodiments of the present application; Figure 5 yes Figure 4 A schematic diagram of the winding principle of another branch of the same coil group in the embodiment; Figure 6 yes Figure 4 A schematic diagram of the winding principle of another branch of the same coil group in the embodiment.

[0060] Figures 4 to 6 The upward arrows in the middle form the forward windings in each branch 201, and the downward arrows form the reverse windings in each branch 201. The longitudinal digital numbers 1 to 54 are the numbers of the stator slots 12, and the transverse digital numbers 1 to 9 are the numbers of the winding layers 11. Figure 4 The number of stator slots 12 that are sequentially spaced when the forward winding of the branch 201 is wound from the 9th layer 13th stator slot 12 to the 7th layer 13th stator slot 12 is the first span group followed by the forward winding, which is the same as Figure 5 The number of stator slots 12 that are sequentially spaced when the forward winding of the branch 201 is wound from the 49th stator slot 12 of the 9th layer to the 49th stator slot 12 of the 7th layer is the same, and is also the same as Figure 6 The number of stator slots 12 that are sequentially spaced when the forward winding of the branch 201 is wound from the 31st stator slot 12 of the 9th layer to the 31st stator slot 12 of the 7th layer. Figures 4 to 6 Each branch 201 is cyclically wound along the arrangement direction of the stator slots 12 according to the same first span group.

[0061] In this embodiment, since each forward winding is continuously wound along the arrangement direction of the stator slots 12 according to the first span group, and is continuously wound along the arrangement direction of the winding layer 11 according to the first layer spacing group, the line shape of each forward winding in the three coil groups 20 along the arrangement direction of the stator slots 12 is the same, and the line shape of each forward winding along the arrangement direction of the winding layer 11 is also the same. Similarly, the line shape of each reverse winding along the arrangement direction of the stator slots 12 is the same, and the line shape of each reverse winding along the arrangement direction of the winding layer 11 is also the same. That is to say, in this embodiment, two line shapes are required when winding along the arrangement direction of the stator slots 12 and the arrangement direction of the winding layer 11, respectively, which can reduce the difficulty of production and keep the potential balance of each branch 201. In the production process, the coil group 20 is generally wound on the stator body 10 by winding with a wire embedding device for automated production. The more line shapes are required, the higher the cost of the wire embedding equipment. In this embodiment, the number of line shapes required is small, which can reduce the equipment cost.

[0062] In addition, in this embodiment, each forward winding can be periodically wound from the starting slot to the end slot according to the first span group and the first layer distance group, and each reverse winding can be wound from the starting slot to the end slot according to the second span group and the second layer distance group, which can simplify the production process. And it is only necessary to connect the end of the forward winding with the head end of the corresponding reverse winding to form the coil of any branch 201, which can reduce the number of welding points, thereby ensuring the consistency and reliability of the product.

[0063] See also Figure 4 In some embodiments, each forward winding includes an inlet terminal 2014 and a first connection terminal 2011. Each forward winding is introduced from the outermost layer of the m winding layers 11 and led out from the innermost layer of the winding layers 11 along the forward direction of the current, and the current flows forward from the inlet terminal 2014 to the first connection terminal 2011; each reverse winding includes an outlet terminal 2013 and a second connection terminal 2012. Each reverse winding is introduced from the innermost layer of the m winding layers 11 and led out from the outermost layer of the winding layers 11 along the forward direction of the current, and the current flows forward from the second connection terminal 2012 to the outlet terminal 2013; the first connection terminal 2011 of each forward winding is welded to the second connection terminal 2012 of the corresponding reverse winding.

[0064] Optionally, the incoming line ends 2014 of different parallel branches 201 in any coil group 20 are adjacent.

[0065] Optionally, each inlet terminal 2014 and the corresponding outlet terminal 2013 are located on the same end side of the stator body 10 .

[0066] In this embodiment, each branch 201 only requires one welding point. In this embodiment, each of the three coil groups 20 includes three parallel branches 201 , so a total of nine welding points are required.

[0067] See also Figure 3 and Figure 4 In some embodiments, the three coil groups 20 are respectively a first phase line group 21, a second phase line group 22 and a third phase line group 23, wherein the first phase line group 21 includes a first U-phase branch 211, a second U-phase branch 212 and a third U-phase branch 213; the second phase line group 22 includes a first V-phase branch 221, a second V-phase branch 222 and a third V-phase branch 223; the third phase line group 23 includes a first W-phase branch 231, a second W-phase branch 232 and a third W-phase branch 233. During the production process of the flat wire motor winding, the first phase wire group 21 can be continuously wound, the inlet end 2014 of the first U-phase branch 211, the first connection end 2011 of the first U-phase branch 211, the second connection end 2012 of the first U-phase branch 211, the outlet end 2013 of the first U-phase branch 211, the inlet end 2014 of the second U-phase branch 212, the first connection end 2011 of the second U-phase branch 212, the second connection end 2012 of the second U-phase branch 212, the outlet end 2013 of the second U-phase branch 212, and the inlet end 2014 of the third U-phase branch 213 , the first connection end 2011 of the third U-phase branch 213, the second connection end 2012 of the third U-phase branch 213, and the outlet end 2013 of the third U-phase branch 213 are connected in sequence, and the first phase line group 21 is continuously wound and formed by the wire embedding equipment, and then the outlet end 2013 of the first U-phase branch 211 and the inlet end 2014 of the second U-phase branch 212 are cut off, and the outlet end 2013 of the second U-phase branch 212 and the inlet end 2014 of the third U-phase branch 213 are cut off, and there is no need to weld the first connection end 2011 and the corresponding second connection end 2012. Similarly, the second phase line group 22 and the third phase line group 23 can also be continuously wound according to this method, which will not be repeated here.

[0068] The terms "first", "second", and "third" in this embodiment are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features.

[0069] In some embodiments, the coil shapes of the first U-phase branch 211, the first V-phase branch 221, and the first W-phase branch 231 are the same; the coil shapes of the second U-phase branch 212, the second V-phase branch 222, and the second W-phase branch 232 are the same; and the coil shapes of the third U-phase branch 213, the third V-phase branch 223, and the third W-phase branch 233 are the same. In the branches 201 with the same coil shape, the number of stator slots 12 between the starting slot and the next slot of each forward winding is the same, and each forward winding can be wound periodically and continuously from the same value in the first span group. The number of stator slots 12 between the starting slot and the next slot of each reverse winding is the same, and each reverse winding can be wound periodically and continuously from the same value in the second span group; and the number of winding layers 11 between the starting slot and the next slot of each forward winding is the same, and the number of winding layers 11 between the starting slot and the next slot of each reverse winding is the same.

[0070] In this embodiment, during the production process of the flat wire motor winding, one coil can be used to continuously wind the first U-phase branch 211, the first V-phase branch 221, and the first W-phase branch 231, and then the outlet end 2013 of the first U-phase branch 211 and the inlet end 2014 of the first V-phase branch 221 are cut off, and the outlet end 2013 of the first V-phase branch 221 and the inlet end 2014 of the first W-phase branch 231 are cut off. Similarly, the second U-phase branch 212, the second V-phase branch 222, and the second W-phase branch 232 can be continuously wound and formed; the third U-phase branch 213, the third V-phase branch 223, and the third W-phase branch 233 can be continuously wound and formed.

[0071] The wire embedding equipment can perform winding in a continuous and identical line shape during operation, further reducing the complexity of the process and improving the production efficiency of the flat wire motor winding.

[0072] See also Figure 7 , Figure 7 yes Figure 4 Schematic diagram of the arrangement relationship of three coil groups in the stator slots in the embodiment. Figure 7 The E direction in is the first direction, Figure 7 The dashed box indicates Figure 4 The stator slot numbers that the forward windings in each coil group 20 in the embodiment pass through in sequence in one cycle. Further, the first phase line group 21 and the second phase line group 22 are integrally translated by three stator slots 12 along the first direction to form the second phase line group 22, and the second phase line group 22 is integrally translated by three stator slots 12 along the first direction to form the third phase line group 23, and the first direction is the arrangement direction of the stator slots 12.

[0073] In this embodiment, the continuous windings in each winding layer 11 in the same stator slot 12 are in phase, and there is no need to use insulating paper to separate the branches 201 of each layer. The cross-sectional area of ​​the continuous wave winding that can be accommodated by the stator slot 12 is increased, which can improve the slot fill rate and the current passing through the wave winding, which is beneficial to improving the output torque of the motor.

[0074] See also Figure 3 In some embodiments, the inlet terminals 2014 of the three coil groups 20 are respectively connected to the U-phase power supply 31, the V-phase power supply 32 and the W-phase power supply 33, and the outlet terminals 2013 of the three coil groups 20 are connected together through a bus.

[0075] In some embodiments, the winding layers of the stator body are arranged from the inside to the outside as 1 to m, the stator slot numbers are 1 to 54, and the actual coordinates of any slot of the stator body are [x, y], where x represents the actual number of the winding layer, x is any one of the winding layers 1 to m, and y represents the actual number of the stator slot, y is any one of 1 to 54.

[0076] The actual coordinates of any slot have corresponding nominal coordinates [a, b], where a represents the nominal number of the winding layer, b represents the nominal number of the stator slot, a is an integer greater than 0 and less than or equal to m, and b is an integer.

[0077] The number of stator slots spaced sequentially when the forward winding is wound in one cycle is k1, k2, k3, k4, k5, k6, where k1, k2, k3, k4, k5 and k6 are positive integers, k1+k2+k3+k4+k5+k6=54.

[0078] Further, k1=7, k2=9, k3=10, k4=9, k5=10, k6=9.

[0079] When the forward winding is wound from the stator slot b1 and the number of stator slots between which the forward winding passes when it reaches the next stator slot is k1, the nominal numbers of the stator slots that the forward winding passes through in one cycle are:

[0080] b1, b1-k1, b1-k1-k2, b1-k1-k2-k3, b1-k1-k2-k3-k4, b1-k1-k2-k3-k4-k5, b1-k1-k2-k3-k4-k5-k6 。

[0081] When the nominal number of the stator slot is b≤0 or b>54, the corresponding actual number of the stator slot is y=b+54t, where t is an integer when 0<y≤54. For example, when b1=13, b=b1-45=-32, then y=b+54=22.

[0082] In some embodiments, the number of winding layers of each forward winding in one cycle is q1, q2, q3, q4, q5, q6, wherein q1, q2, q3, q4, q5 and q6 are natural numbers, q1+q2+q3+q4+q5+q6=2.

[0083] Specifically, when the forward winding is wound from the a1th layer, if the number of winding layers between the forward winding and the next slot is q1, the nominal numbers of the stator slots that the forward winding passes through in one cycle are:

[0084] a1-q1, a1-q1-q2, a1-q, a1-q1-q2-q3, a1-q1-q2-q3-q4, a1-q1-q2-q3-q4-q5, a1-q1-q2-q3-q4-q5-q6.

[0085] The actual serial number x of any winding layer is equal to the corresponding nominal serial number a of the winding layer. If a1=m, q1=q2=q3=q4=0, q5=q6=1.

[0086] In some embodiments, the number of stator slots spaced sequentially when each reverse winding is wound in one cycle is j1, j2, j3, j4, j5, j6, where j1, j2, j3, j4, j5 and j6 are positive integers, j1+j2+j3+j4+j5+j6=54.

[0087] Further, j1=7, j2=9, j3=10, j4=9, j5=10, j6=9.

[0088] When the reverse winding is wound from the stator slot No. b2 and the number of stator slots between which the reverse winding passes when it reaches the next stator slot is j1, the nominal numbers of the stator slots that the reverse winding passes through in one cycle are:

[0089] b2, b2+j1, b2+j1+j2, b2+j1+j2+j3, b2+j1+j2+j3+j4, b2+j1+j2+j3+j4+j5, b2+j1+j2+j3+j4+j5+j6.

[0090] When b≤0 or b>54 in the nominal serial number of the stator slot, the corresponding actual serial number of the stator slot is y=b+54t, wherein t is an integer when 0<y≤54.

[0091] In some embodiments, the number of winding layers of each reverse winding in one cycle is p1, p2, p3, p4, p5, p6, wherein p1, p2, p3, p4, p5 and p6 are natural numbers, p1+p2+p3+p4+p5+p6=2.

[0092] When the forward winding starts from the a2th layer, if the number of winding layers between the reverse winding and the next slot is p1, the nominal numbers of the stator slots that the reverse winding passes through in one cycle are:

[0093] a2, a2+p1, a2+p1+p2, a2+p1+p2+p3, a2+p1+p2+p3+p4, a2+p1+p2+p3+p4+p5, a2+p1+p2+p3+p4+p5+p6.

[0094] Specifically, when the reverse winding is wound from the a2=1th layer, p1=1, p2=p3=p4=p5=0, and p6=1.

[0095] In some embodiments, any forward winding is continuously wound in the forward direction of the current from the mth layer according to the first span group and the first layer distance group until a=0 in the nominal coordinates and starts to be reversely wound, and any reverse winding is continuously wound from the 1st layer according to the second span group and the first layer distance group until a=m+1 in the nominal coordinates and stops.

[0096] The number of stator slots in the first span group of the forward winding and the second span group of the reverse winding is the same. When any forward winding is continuously wound according to the first span group to the nominal coordinate of the slot position a=0, if the corresponding stator slot actual serial number is Zb, and Zb is any integer value from 1 to 54, then the actual coordinate of the starting slot position of the reverse winding corresponding to the forward winding is [1, Zb].

[0097] In some embodiments, the starting slots of the forward windings in the three parallel branches in the same coil group are arranged in sequence and adjacent to each other along the stator slot arrangement direction, and when the number of stator slots between the starting slot and the next slot of the forward winding of one of the parallel branches is ki, i is any integer from 1 to 6. If 0<i+4<6, the number of stator slots between the starting slot and the next slot of the forward windings of adjacent parallel branches is k(i+4); if i+4>6, the number of stator slots between the starting slot and the next slot of the forward windings of adjacent parallel branches is k(i+2).

[0098] For example, the starting slots of the forward windings in the first U-phase branch, the first V-phase branch and the first W-phase branch are arranged sequentially and adjacently along the stator slot arrangement direction, the number of stator slots between the starting slot and the next slot of the forward winding of the first U-phase branch is k1, the number of stator slots between the starting slot and the next slot of the forward winding of the first V-phase branch is k5, and the number of stator slots between the starting slot and the next slot of the forward winding of the first W-phase branch is k3.

[0099] In some embodiments, let m be the number of winding layers, m∈2n+1 (n is a positive integer, and n≥1), when the forward winding of the first U-phase branch is wound from the stator slot b1 of the m-th layer and the number of stator slots between the first and next slots is k1=7, the nominal coordinates of the slots that the forward winding in the first U-phase branch passes through in sequence are as follows:

[0100] [m, b1], [m, (b1-7)], [m, (b1-16)], [m, (b1-26)], [m, (b1-35)], [(m-1), (b1-45)], [(m-2), (b1-54)], [(m-2), (( b1-54)-7)], [(m-2), ((b1-54)-16)], [(m-2), ((b1-54)-26)], [(m-2), ((b1-54)-35)], [(m-3), ((b1-54)-45)]……

[0101] When the reverse winding in the first U-phase branch starts to be wound from the stator slot position b2 of the first layer and the number of stator slots between which the reverse winding reaches the next stator slot is j2=9,

[0102] The nominal coordinates of the slots through which the reverse winding passes in the first U-phase branch are as follows:

[0103] [1, b2], [2, (b2+9)], [2, (b2+19)], [2, (b2+28)], [2, (b2+37)], [2, (b2+47)], [3, (b2+54)], [4, ((b2+54)+ 9)], [4, ((b2+54)+19)], [4, ((b2+54)+28)], [4, ((b2+54)+37)], [4, ((b2+54)+47)], [5, ((b2+54)+54)]…

[0104] Among them, if the number of winding layers m is 3, the forward winding in the first U-phase branch is calculated at [(m-3), ((b1-54)-45)] and a=m-3=0, then the nominal coordinates of the forward winding in the first U-phase branch at the terminal slot are [(m-2), ((b1-54)-35)]. The reverse winding in the first U-phase branch is calculated at [4, ((b2+54)+9)] and a=4=m+1, so the nominal coordinates of the reverse winding in the first U-phase branch at the terminal slot are [3, (b2+54)]. Obviously, ((b1-54)-35)<0, b2=b1-89+54t, t is an integer when 0<b2≤54.

[0105] Furthermore, when the number of winding layers is 3, the forward winding of the first U-phase branch is wound starting from the 13th stator slot and the number of stator slots between the next slot is k1=7, the actual coordinates and nominal coordinates of the forward winding in the first U-phase branch at the starting slot are [3, 13].

[0106] The nominal coordinates of the terminal slot of the forward winding are [1, -76], and the actual coordinates are [1, 32].

[0107] The forward winding is continuously wound according to the first span group and the first layer distance group until the nominal coordinates of the slot when a=0 are [(m-3), ((b1-54)-45)]=[0,-86], and the actual coordinates are [0,22]. Then the starting slot of the reverse winding corresponding to the forward winding is [1,22]. The actual coordinates and nominal coordinates of the reverse winding at the starting slot are [1,22], the nominal coordinates at the end slot are [3,76], and the actual coordinates at the end slot are [3,22].

[0108] If the number of winding layers is 5, and the forward winding of the first U-phase branch is wound from the stator slot b1 and the number of stator slots between the first and second slots is k3=10, the nominal coordinates of the slots that the forward winding of the first U-phase branch passes through in sequence are as follows:

[0109] [5,b1], [5,(b1-10)], [5,(b1-19)], [5,(b1-29)], [5,(b1-38)], [4,(b1-45)], [3, (b1-54)], [3, ((b1-54)-10)], [3, ((b1-54)-19)], [3, ((b1-54)-29)], [3, ( (b1-54)-38)], [2, ((b1-54)-45)], [1, ((b1-54)-54)], [1, (((b1-54)-54)-10) ], [1, (((b1-54)-54)-19)], [1, (((b1-54)-54)-29)], [1, (((b1-54)-54)-38)]

[0110] When the number of winding layers is 5, the reverse winding of the first U-phase branch is wound from the stator slot b2 and the number of stator slots between the first and second slots is j6=9, the nominal coordinates of the slots that the reverse winding in the first U-phase branch passes through in sequence are as follows:

[0111] [1, b2], [2, (b2+9)], [2, (b2+16)], [2, (b2+25)], [2, (b2+35)], [2, (b2+44)], [3, (b2+54)], [4, ((b2+54) +9)], [4, ((b2+54)+16)], [4, ((b2+54)+25)], [4, ((b2+54)+35)], [4, ((b2+54)+44)], [5, ((b2+54)+54)]

[0112] Furthermore, when the number of winding layers is 5, the forward winding of the first U-phase branch is wound from the 15th stator slot and the number of stator slots between the first and next slots is k3=10, the actual coordinates of the slots that the forward winding in the first U-phase branch passes through in sequence are as follows:

[0113] [5,15], [5,5], [5,50], [5,40], [5,31], [4,24], [3,15], [3,5], [3,50], [3,40], [3,31], [2,24], [1,15], [1,5], [1,50], [1,43], [1,31]

[0114] The forward winding is continuously wound according to the first span group and the first layer distance group until the actual stator slot number corresponding to a=0 in the nominal coordinates of the slot is Zb=24, and the starting slot of the reverse winding corresponding to the forward winding is [1, 24].

[0115] The reverse winding of the first U-phase branch is wound starting from the 24th stator slot. The actual coordinates of the slots that the reverse winding of the first U-phase branch passes through in sequence are as follows:

[0116] [1,24], [2,33], [2,40], [2,49], [2,5], [2,14], [3,24], [4,33], [4,40], [4,49], [4,5], [4,14], [5,24]

[0117] In some embodiments, taking m=9 as an example, the first U-phase branch is wound from the 13th stator slot and the number of stator slots between the first and next slots is k1=7. The actual coordinates of the slots that the forward winding in the first U-phase branch passes through in sequence are as follows:

[0118] [9,13], [9,6], [9,51], [9,41], [9,32], [8,22], [7,13], [7,6], [7,51], [7,41], [7,32], [6,22], [5,13], [5,6], [5,51], [5,41], [5,32], [4,22], [3,13], [3,6], [3,51], [3,41], [3,32], [2,22], [1,13], [1,6], [1,51], [1,41], [1,32]

[0119] The actual coordinates of the slots through which the reverse winding passes in the first U-phase branch are as follows:

[0120] [1,22], [2,31], [2,41], [2,50], [2,6], [2,15], [3,22], [4,31], [4,41], [4,50], [4,6], [4,15], [5,22], [6,31], [6,41], [6,50], [6,6], [6,15], [7,22], [8,31], [8,41], [8,50], [8,6], [8,15], [9,22]

[0121] The second U-phase branch is wound from the 14th stator slot and the number of stator slots between the next slot is k5=10. The actual coordinates of the slots that the forward winding in the second U-phase branch passes through in sequence are as follows:

[0122] [9,14], [9,4], [9,49], [9,42], [9,33], [8,23], [7,14], [7,4], [7,49], [7,42], [7,33], [6,23], [5,14], [5,4], [5,49], [5,42], [5,33], [4,23], [3,14], [3,4], [3,49], [3,42], [3,33], [2,23], [1,14], [1,4], [1,49], [1,42], [1,33]

[0123] The actual coordinates of the slots through which the reverse winding in the second U-phase branch passes in sequence are as follows:

[0124] [1,23], [2,32], [2,42], [2,51], [2,4], [2,13], [3,3], [4,32], [4,42], [4,51], [4,4], [4,13], [5,23], [6,32], [6,42], [6,51], [6,4], [6,13], [7,23], [8,32], [8,42], [8,51], [8,4], [8,13], [9,23]

[0125] The third U-phase branch is wound from the 15th stator slot and the number of stator slots between the next slot is k3=10. The actual coordinates of the slots that the forward winding in the third U-phase branch passes through in sequence are as follows:

[0126] [9,15], [9,5], [9,50], [9,40], [9,31], [8,24], [7,15], [7,5], [7,50], [7,40], [7,31], [6,24], [5,15], [5,5], [5,50], [5,40], [5,31], [4,24], [3,15], [3,5], [3,50], [3,40], [3,31], [3,24], [2,15], [2,5], [2,50], [2,40], [2,31]

[0127] The actual coordinates of the slots through which the reverse winding in the third U-phase branch passes in sequence are as follows:

[0128] [1,24], [2,33], [2,40], [2,49], [2,5], [2,14], [3,24], [4,33], [4,40], [4,49], [4,5], [4,14], [5,24], [6,33], [6,40], [6,49], [6,5], [6,14], [7,24], [8,33], [8,40], [8,49], [8,5], [8,14], [9,24]

[0129] The actual coordinates of the slots that the forward winding in the first V-phase branch passes through in sequence are as follows:

[0130] [9,16], [9,9], [9,54], [9,44], [9,35], [8,25], [7,16], [7,9], [7,54], [7,44], [7,35], [6,25], [5,16], [5,9], [5,54], [5,44], [5,35], [4,25], [3,16], [3,9], [3,54], [3,44], [3,35], [2,25], [1,16], [1,9], [1,54], [1,44], [1,35]

[0131] The actual coordinates of the slots through which the reverse winding in the first V-phase branch passes in sequence are as follows:

[0132] [1,25], [2,34], [2,44], [2,53], [2,9], [2,18], [3,25], [4,34], [4,44], [4,53], [4,9], [4,18], [5,25], [6,34], [6,44], [6,53], [6,9], [6,18], [7,25], [8,34], [8,44], [8,53], [8,9], [8,18], [9,25]

[0133] The actual coordinates of the slots that the forward winding in the second V-phase branch passes through in sequence are as follows:

[0134] [9,17], [9,7], [9,52], [9,45], [9,36], [8,26], [7,17], [7,7], [7,52], [7,45], [7,36], [6,26], [5,17], [5,7], [5,52], [5,45], [5,36], [4,26], [3,17], [3,7], [3,52], [3,45], [3,36], [2,26], [1,17], [1,7], [1,52], [1,45], [1,36]

[0135] The actual coordinates of the slots through which the reverse winding in the second V-phase branch passes in sequence are as follows:

[0136] [1,26], [2,35], [2,45], [2,54], [2,7], [2,26], [3,6], [4,35], [4,45], [4,54], [4,7], [4,16], [5,26], [6,35], [6,45], [6,54], [6,7], [6,16], [7,26], [8,35], [8,45], [8,54], [8,7], [8,16], [9,26]

[0137] The actual coordinates of the slots that the forward winding in the third V-phase branch passes through in sequence are as follows:

[0138] [9,18], [9,8], [9,53], [9,43], [9,34], [8,27], [7,18], [7,8], [7,53], [7,43], [7,34], [6,27], [5,18], [5,8], [5,53], [5,43], [5,34], [4,27], [3,18], [3,8], [3,53], [3,43], [3,34], [3,27], [2,18], [2,8], [2,53], [2,43], [2,34]

[0139] The actual coordinates of the slots through which the reverse winding in the third V-phase branch passes in sequence are as follows:

[0140] [1,27], [2,36], [2,43], [2,52], [2,8], [2,17], [3,27], [4,36], [4,43], [4,52], [4,8], [4,17], [5,27], [6,36], [6,43], [6,52], [6,8], [6,17], [7,27], [8,36], [8,43], [8,52], [8,8], [8,17], [9,27]

[0141] The actual coordinates of the slots that the forward winding in the first W-phase branch passes through in sequence are as follows:

[0142] [9,19], [9,12], [9,3], [9,47], [9,38], [8,28], [7,19], [7,12], [7,57], [7,47], [7,38], [6,28], [5,19], [5,12], [5,3], [5,47], [5,38], [4,28], [3,19], [3,12], [3,3], [3,47], [3,38], [2,28], [1,19], [1,12], [1,3], [1,47], [1,38]

[0143] The actual coordinates of the slots through which the reverse winding in the first W-phase branch passes in sequence are as follows:

[0144] [1,28], [2,38], [2,48], [2,2], [2,12], [2,21], [3,28], [4,37], [4,47], [4,2], [4,12], [4,21], [5,28], [6,37], [6,47], [6,56], [6,12], [6,21], [7,28], [8,37], [8,47], [8,2], [8,12], [8,21], [9,28]

[0145] The actual coordinates of the slots that the forward winding in the second W-phase branch passes through in sequence are as follows:

[0146] [9,20], [9,10], [9,1], [9,48], [9,39], [8,29], [7,20], [7,10], [7,1], [7,48], [7,39], [6,29], [5,20], [5,10], [5,1], [5,48], [5,39], [4,29], [3,20], [3,10], [3,1], [3,48], [3,39], [2,29], [1,20], [1,10], [1,1], [1,48], [1,39]

[0147] The actual coordinates of the slots through which the reverse winding in the second W-phase branch passes in sequence are as follows:

[0148] [1,29], [2,38], [2,48], [2,3], [2,10], [2,29], [3,9], [4,38], [4,48], [4,3], [4,10], [4,19], [5,29], [6,38], [6,48], [6,3], [6,10], [6,19], [7,29], [8,38], [8,48], [8,3], [8,10], [8,19], [9,29]

[0149] The actual coordinates of the slots that the forward winding in the third W-phase branch passes through in sequence are as follows:

[0150] [9,21], [9,11], [9,2], [9,46], [9,37], [8,30], [7,21], [7,11], [7,2], [7,46], [7,37], [6,30], [5,21], [5,11], [5,2], [5,46], [5,37], [4,30], [3,21], [3,11], [3,2], [3,46], [3,37], [3,30], [2,21], [2,11], [2,2], [2,46], [2,37]

[0151] The actual coordinates of the slots through which the reverse winding in the third W-phase branch passes in sequence are as follows:

[0152] [1,30], [2,39], [2,46], [2,1], [2,11], [2,20], [3,30], [4,39], [4,46], [4,1], [4,11], [4,20], [5,30], [6,39], [6,46], [6,1], [6,11], [6,20], [7,30], [8,39], [8,46], [8,1], [8,11], [8,20], [9,30]

[0153] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0154] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A flat wire motor winding, characterized in that: include: A stator body, the stator body comprising m winding layers, wherein m=2n+1, n is a positive integer and n≥1, the stator body having 54 stator slots along its circumference and any of the stator slots forming a slot position in any of the winding layers; Three coil groups, each of which has three parallel branches, each of which includes a forward winding and a corresponding reverse winding, each of which is circulated and continuously wound in the stator slots according to a first span group along the stator slot arrangement direction, and is circulated and continuously wound on the winding layer according to a first layer distance group along the winding layer arrangement direction; each of which is circulated and continuously wound in the stator slots according to a second span group along the stator slot arrangement direction, and is circulated and continuously wound on the winding layer according to a second layer distance group along the winding layer arrangement direction; The first span group is the number of stator slots spaced apart in sequence when each forward winding is wound in one cycle; the second span group is the number of stator slots spaced apart in sequence when each reverse winding is wound in one cycle; the first layer spacing group is the number of winding layers spaced apart in sequence when each forward winding is wound in one cycle; the second span group is the number of winding layers spaced apart in sequence when each reverse winding is wound in one cycle.

2. The flat wire motor winding according to claim 1, characterized in that: The three coil groups are respectively a first phase line group, a second phase line group and a third phase line group, the first phase line group includes a first U-phase branch, a second U-phase branch and a third U-phase branch; the second phase line group includes a first V-phase branch, a second V-phase branch and a third V-phase branch; the third phase line group includes a first W-phase branch, a second W-phase branch and a third W-phase branch; wherein, The coil shapes of the first U-phase branch, the first V-phase branch and the first W-phase branch are the same; the coil shapes of the second U-phase branch, the second V-phase branch and the second W-phase branch are the same; the coil shapes of the third U-phase branch, the third V-phase branch and the third W-phase branch are the same.

3. The flat wire motor winding according to claim 2, characterized in that: The first phase line group and the second phase line group are integrally shifted by three stator slots along a first direction to form the second phase line group, and the second phase line group is integrally shifted by three stator slots along the first direction to form a third phase line group, and the first direction is the arrangement direction of the stator slots.

4. The flat wire motor winding according to any one of claims 1 to 3, characterized in that: The number of stator slots that are sequentially spaced when each of the forward windings is wound in one cycle is k1, k2, k3, k4, k5, k6, wherein k1, k2, k3, k4, k5 and k6 are positive integers, k1+k2+k3+k4+k5+k6=54; The number of stator slots spaced sequentially when each reverse winding is wound in one cycle is j1, j2, j3, j4, j5, j6, wherein j1, j2, j3, j4, j5 and j6 are positive integers, j1+j2+j3+j4+j5+j6=54.

5. The flat wire motor winding according to claim 4, characterized in that: The number of winding layers of each forward winding in one cycle is q1, q2, q3, q4, q5, q6, wherein q1, q2, q3, q4, q5 and q6 are natural numbers, q1+q2+q3+q4+q5+q6=2; The number of winding layers spaced sequentially when each reverse winding is wound in one cycle is p1, p2, p3, p4, p5, p6, where p1, p2, p3, p4, p5 and p6 are natural numbers, p1+p2+p3+p4+p5+p6=2.

6. The flat wire motor winding according to claim 5, characterized in that: The starting slots of the forward windings of the three parallel branches in the same coil group are arranged in sequence and adjacent to each other along the stator slot arrangement direction. When the number of stator slots between the starting slot and the next slot of the forward winding of one of the parallel branches is ki, i is any integer from 1 to 6, If 0<i+4<6, the number of stator slots between the positive windings of adjacent parallel branches from the starting slot to the next slot is k(i+4); If i+4>6, the number of stator slots between the positive windings of adjacent parallel branches from the starting slot to the next slot is k(i+2).

7. The flat wire motor winding according to claim 6, characterized in that: The winding layers of the stator body are sequentially arranged from inside to outside as 1 to m, and the stator slot numbers are sequentially arranged from 1 to 54. The actual coordinates of any slot position of the stator body are [x, y], wherein x represents the winding layer number, and x is any one of the winding layers 1 to m, and y represents the stator slot number, and y is any one of 1 to 54; The actual coordinates of any of the slots have corresponding nominal coordinates [a, b], where a represents the nominal number of the winding layer, b represents the nominal number of the stator slot, a is an integer greater than 0 and less than or equal to m, and b is an integer; x of any of the actual numbers of the winding layer is equal to the corresponding nominal number of the winding layer a; when the nominal number of the stator slot b≤0 or b>54, the corresponding actual number of the stator slot y=b+54t, and t takes an integer when 0<y≤54; When the forward winding is wound from the nominal coordinates [a1, b1] of the slot, if the number of stator slots separated by the forward winding when it reaches the next slot is k1, the nominal serial numbers of the stator slots passed by the forward winding in one cycle are: b1, b1-k1, b1-k1-k2, b1-k1-k2-k3, b1-k1-k2-k3-k4, b1-k1-k2-k3-k4-k5, b1-k1-k2-k3-k4-k5-k6; If the number of winding layers between which the forward winding reaches the next slot is q1, the nominal numbers of the stator slots that the forward winding passes through in one cycle are: a1-q1, a1-q1-q2, a1-q, a1-q1-q2-q3, a1-q1-q2-q3-q4, a1-q1-q2-q3-q4-q5, a1-q1-q2-q3-q4-q5-q6.

8. The flat wire motor winding according to claim 6, characterized in that: When the reverse winding is wound from the nominal coordinates of the slot [a2, b2], if the number of stator slots separated by the reverse winding when it reaches the next slot is j1, the nominal numbers of the stator slots passed by the forward winding in one cycle are: b2, b2+j1, b2+j1+j2, b2+j1+j2+j3, b2+j1+j2+j3+j4, b2+j1+j2+j3+j4+j5, b2+j1+j2+j3+j4+j5+j6; If the number of winding layers between which the reverse winding reaches the next slot is p1, the nominal numbers of the stator slots that the reverse winding passes through in one cycle are: a2, a2+p1, a2+p1+p2, a2+p1+p2+p3, a2+p1+p2+p3+p4, a2+p1+p2+p3+p4+p5, a2+p1+p2+p3+p4+p5+p6.

9. The flat wire motor winding according to claim 7, characterized in that: When the forward winding is wound from the outermost layer, q1=q2=q3=q4=0, q5=q6=1; When the reverse winding is wound from the first layer, p1=1, p2=p3=p4=p5=0, and p6=1.

10. The flat wire motor winding according to claim 7, characterized in that: k1=7, k2=9, k3=10, k4=9, k5=10, k6=9; j1=7, j2=9, j3=10, j4=9, j5=10, j6=9.

11. The flat wire motor winding according to claim 7, characterized in that: Any of the forward windings is continuously wound along the forward direction of the current from the mth layer according to the first span group and the first layer distance group until a=0 in the nominal coordinate and then starts to be wound in the reverse direction; any of the reverse windings is continuously wound from the 1st layer according to the second span group and the second layer distance group until a=m+1 in the nominal coordinate and then stops.

12. The flat wire motor winding according to claim 11, characterized in that: When any of the forward windings is continuously wound according to the first span group to the nominal coordinate of the slot position a=0, if the actual serial number of the corresponding stator slot is Z b , Z b is any integer value from 1 to 54, then the actual coordinates of the starting slot of the reverse winding corresponding to the forward winding are [1, Z b ].

13. The flat wire motor winding according to any one of claims 1 to 3, characterized in that: Each of the forward windings comprises an inlet terminal and a first connection terminal, each of the forward windings is introduced from the outermost layer of the m winding layers and led out from the innermost layer of the winding layers along the forward direction of the current, and the forward current flows from the inlet terminal to the first connection terminal; Each of the reverse windings comprises an outlet terminal and a second connection terminal, each of the reverse windings is introduced from the innermost layer of the m winding layers and led out from the outermost layer of the winding layers along the positive direction of the current, and the positive direction of the current flows from the second connection terminal to the outlet terminal; The first connection end of each forward winding is welded to the second connection end of the corresponding reverse winding.

14. The flat wire motor winding according to claim 13, characterized in that: The inlet ends of the three coil groups are connected to a U-phase power supply, a V-phase power supply and a W-phase power supply respectively, and the outlet ends of the three coil groups are connected together through a bus bar.

15. The flat wire motor winding according to claim 14, characterized in that: Each of the inlet terminals and the corresponding outlet terminals are located on the same end side of the stator body.

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