Motor stator and motor

Abstract

This invention discloses a motor stator and a motor. The motor stator includes a stator core and a stator winding. The inner wall of the stator core is uniformly provided with multiple axially penetrating stator slots along the circumference. The stator winding is sequentially arranged around the stator core in the multiple stator slots and forms 2N conductor layers from the inside out or from the outside in. The multiple stator slots can be divided into multiple groups. Each group of stator slots corresponds to one stage of a phase of the stator winding. Each phase stator winding is correspondingly arranged in 2X groups of stator slots. The first end of the first conductor portion of the first conductor layer of the first group of stator slots is formed as the inlet end, and the first end of the first conductor portion of the first conductor layer of the second group of stator slots is formed as the outlet end. The inlet and outlet positions of multiple branches in the motor stator are simultaneously located in the innermost or outermost adjacent stator slots of the stator winding, making the connection of the motor end leads convenient and simple, reducing the end size of the motor, and lowering the production cost of the motor.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a motor stator and a motor. Background Technology

[0002] In the existing technology, the winding method of the stator winding of the motor stator results in a large relative distance between the various lead-in or lead-out wires at the end position, which is not convenient for connection. The end size will also increase as a result, which further complicates the structure and process of the motor, increases the production cost, and there is room for improvement. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, the present invention proposes a motor stator in which the lead-in and lead-out positions of multiple branches of the motor stator are simultaneously located in adjacent stator slots of the innermost or outermost layer of the stator winding, making the connection of the motor end lead wires convenient and simple, reducing the end size of the motor, and lowering the production cost of the motor.

[0004] The present invention also proposes a motor having the above-mentioned motor stator.

[0005] According to an embodiment of the present invention, a motor stator includes: a stator core and a stator winding. The inner wall of the stator core is uniformly provided with a plurality of axially penetrating stator slots along the circumference. The stator winding is sequentially arranged around the stator core in the plurality of stator slots, forming 2N conductor layers from the inside out or from the outside in, where N is a positive integer. The stator winding includes multiple phases. The plurality of stator slots can be divided into multiple groups. Each group of stator slots corresponds to a stage in one phase of the stator winding. Each phase of the stator winding is correspondingly arranged in 2X groups of stator slots, where X is an integer. All corresponding stator slot groups are arranged sequentially in a counterclockwise direction. The stator winding includes:

[0006] A first conductor portion is inserted into the stator slot and forms a conductor layer within the stator slot. The first end of the first conductor portion of the 2kth conductor layer of the zth stator slot group is welded to the first end of the first conductor portion of the 2k-1th conductor layer of the z+1th stator slot group, where z is an integer not equal to 1. The first end of the first conductor portion of the 2kth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion of the 2k+1th conductor layer of the first stator slot group. The first end of the first conductor portion of the 2k+1th conductor layer of the second stator slot group is welded to the first end of the first conductor portion of the 2kth conductor layer of the first stator slot group. The first end of the first conductor portion of the 2Nth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion of the 2Nth conductor layer of the first stator slot group.

[0007] The second conductor portion is connected between the second end of the first conductor portion of the 2k-1th conductor layer of the mth stator slot group and the second end of the first conductor portion of the 2kth conductor layer of the m+1th stator slot group, and between the second end of the first conductor portion of the 2k-1th conductor layer of the 2Xth stator slot group and the second end of the first conductor portion of the 2kth conductor layer of the first stator slot group, where m is an integer and k is an integer.

[0008] According to an embodiment of the present invention, the stator of the motor has multiple branches whose lead-in and lead-out positions are simultaneously located in the innermost or outermost adjacent stator slots of the stator winding, which makes the connection of the motor end lead wires convenient and simple, reduces the end size of the motor, and lowers the production cost of the motor.

[0009] In addition, the motor stator according to the embodiments of the invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the first end of the first conductor portion of the first conductor layer of the first group of stator slots is formed as an input end, the first end of the first conductor portion of the first conductor layer of the second group of stator slots is formed as an output end, and the first ends of the remaining first conductor portions are formed as lead portions.

[0011] According to some embodiments of the present invention, a group of stator slots corresponds to four stator slots, and the stator slots corresponding to the group of stator slots are arranged sequentially in a counterclockwise direction, namely, the first slot, the second slot, the third slot, and the fourth slot; each phase winding includes a first branch, a second branch, a third branch, and a fourth branch, and the conductors of the same branch are connected in series. In the same conductor layer corresponding to the four stator slots in a group of stator slots, the first conductor portions of the first branch to the fourth branch are respectively provided, wherein the first conductor portion of the 4m-3th group of stator slots... The 4k-3rd conductor layer of the first slot, the 4kth conductor layer of the second slot, the 4k-1st conductor layer of the third slot and the 4k-2nd conductor layer of the fourth slot, and the 4kth conductor layer of the first slot of the 4m-2 group of stator slots, the 4k-3rd conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-1st conductor layer of the fourth slot, and the 4k-1st conductor layer of the first slot, the 4kth conductor layer of the second slot, the 4k-3rd conductor layer of the third slot and the 4k-2nd conductor layer of the fourth slot of the 4m-1 group of stator slots. The conductor layer, and the first conductor portion of the first slot of the 4m group stator slots, the 4k-2nd conductor layer of the first slot, the 4k-1st conductor layer of the second slot, the 4kth conductor layer of the third slot, and the 4k-3rd conductor layer of the fourth slot, are provided with the first conductor portion of the first branch; the first conductor layer of the first slot, the 4k-2nd conductor layer of the second slot, the 4k-3rd conductor layer of the third slot, and the 4kth conductor layer of the fourth slot of the 4m-3 group stator slots, and the first conductor portion of the first slot of the 4m-2 group stator slots, the 4k-2nd conductor layer of the second slot, and the 4k-3rd conductor layer of the fourth slot, are provided with the first conductor portion of the first branch; The first conductor portion of the second branch is provided in the 4k-1 layer conductor layer, the 4k-3 layer conductor layer of the third slot and the 4k-3 layer conductor layer of the fourth slot, the 4k-2 layer conductor layer of the first slot of the 4m-1 group of stator slots, the 4k-1 layer conductor layer of the third slot and the 4k-3 layer conductor layer of the fourth slot, and the 4k-2 layer conductor layer of the first slot, the 4k-3 layer conductor layer of the second slot, the 4k-2 layer conductor layer of the third slot and the 4k-1 layer conductor layer of the fourth slot of the 4m group of stator slots;The first conductor layer of the third branch is provided in the first conductor layer of the first slot of the 4m-3 group stator slot, the 4k-3rd conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-1st conductor layer of the fourth slot; and in the first slot of the 4m-3 group stator slot, the 4k-3rd conductor layer of the second slot, the 4k-1st conductor layer of the third slot and the 4k-2nd conductor layer of the fourth slot; and in the first slot of the 4m-1 group stator slot, the 4k-1st conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-3rd conductor layer of the fourth slot; and in the first slot of the 4m group stator slot, the 4k-1st conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-3rd conductor layer of the fourth slot; The first conductor portion of the fourth branch is provided in the 4k-2 layer conductor layer of the first slot, the 4k-1 layer conductor layer of the second slot, the 4k layer conductor layer of the third slot, and the 4k-3 layer conductor layer of the fourth slot in the 4m-3 group of stator slots;

[0012] According to some embodiments of the present invention, the ratio of the number of stator slots in the stator core to the number of motor poles is Y. Specifically, when the first conductor portion connected to the second conductor portion in a clockwise direction is located in the first slot of the corresponding stator slot group and the first conductor portion connected in a counterclockwise direction is located in the third slot of the corresponding stator slot group, or when the first conductor portion connected to the second conductor portion in a clockwise direction is located in the second slot of the corresponding stator slot group and the first conductor portion connected in a counterclockwise direction is located in the fourth slot of the corresponding stator slot group, the span of the second conductor portion is Y+2. When the first conductor portion connected to the second conductor portion in a clockwise direction is located in the third slot of the corresponding stator slot group and the first conductor portion connected in a counterclockwise direction is located in the first slot of the corresponding stator slot group, or when the first conductor portion connected to the second conductor portion in a clockwise direction is located in the fourth slot of the corresponding stator slot group and the first conductor portion connected in a counterclockwise direction is located in the second slot of the corresponding stator slot group, the span of the second conductor portion is Y-2.

[0013] According to some embodiments of the present invention, the second conductor portion with a span of Y-2 and the first conductor portion connected at both ends thereto together constitute a first flat wire coil, and the second conductor portion with a span of Y+2 and the first conductor portion connected at both ends thereto together constitute a second flat wire coil.

[0014] According to some embodiments of the present invention, the end of the second end of the second flat wire coil is flattened.

[0015] According to some embodiments of the present invention, in each branch, the first flat wire coil and the second flat wire coil are alternately connected.

[0016] According to some embodiments of the present invention, the first branch, the second branch, the third branch and the fourth branch can be connected in series or in parallel, or two branches can be connected in series and then in parallel.

[0017] According to some embodiments of the present invention, the stator winding includes a three-phase winding with a star connection or a delta connection.

[0018] According to another aspect of the present invention, the motor includes the motor stator described above. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the motor stator according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a motor according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a motor stator according to an embodiment of the present invention;

[0022] Figure 4 This is a partial structural schematic diagram of the motor stator according to an embodiment of the present invention;

[0023] Figure 5 This is a partial structural schematic diagram of the motor stator according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the first flat wire coil according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the second flat wire coil according to an embodiment of the present invention.

[0026] Figure label:

[0027] Motor stator 100, stator core 1, stator slot 11, stator winding 2, first conductor section 21, inlet end 211, outlet end 212, lead section 213, second conductor section 22, first branch 01, second branch 02, third branch 03, fourth branch 04, first flat wire coil 10, second flat wire coil 20. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the prior art, the winding method of the stator winding of the motor stator results in a large relative distance between the various lead-in or lead-out wires at the end position, which is not convenient for connection. The end size will also increase as a result, which further complicates the structure and process of the motor and increases the production cost.

[0031] To address this, this invention provides a motor stator 100 with a new winding method for the stator winding 2. In this motor stator 100, multiple branches under one phase are introduced into and led out from adjacent stator slots 11 under one pole. The introduction and exit positions of the multiple branches are simultaneously located in the innermost or outermost layer of the stator winding 2, making the connection of the motor end lead wires convenient and simple, reducing the end size of the motor, and lowering the production cost of the motor.

[0032] The following is for reference. Figures 1-7 A motor stator 100 according to an embodiment of the present invention is described.

[0033] According to an embodiment of the present invention, the motor stator 100 may include: a stator core 1 and a stator winding 2.

[0034] The stator core 1 has multiple axially penetrating stator slots 11 evenly distributed circumferentially on its inner wall. The stator windings 2 are sequentially arranged around the stator core 1 within these slots, forming 2N conductor layers from the inside out or from the outside in, where N is a positive integer. Figure 1 The first row represents the first and second conductor layers within stator slot 11, the second row represents the third and fourth conductor layers within stator slot 11, and the third row represents the fifth and sixth conductor layers. Figure 2 Each row represents a conductor layer, and each column represents a stator slot 11.

[0035] Furthermore, the stator winding 2 includes multiple phases, and the multiple stator slots 11 can be divided into multiple groups. Each group of stator slots corresponds to one stage in a phase of the stator winding 2. Each phase stator winding 2 is correspondingly set in 2X groups of stator slots, where X is an integer. All corresponding stator slot groups are rotated counterclockwise (e.g., ...). Figure 1 and Figure 2 The OB directions shown are arranged sequentially.

[0036] The stator winding 2 includes a first conductor portion 21 and a second conductor portion 22. The first conductor portion 21 is inserted into the stator slot 11 and forms a conductor layer in the stator slot 11. The second conductor portion 22 is used to connect the two first conductor portions 21 at the second end.

[0037] Specifically, the first end of the first conductor portion 21 of the 2kth conductor layer of the zth stator slot group is welded to the first end of the first conductor portion 21 of the 2k-1th conductor layer of the z+1th stator slot group, where z is an integer not equal to 1. The first end of the first conductor portion 21 of the 2kth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion 21 of the 2k+1th conductor layer of the first stator slot group. The first end of the first conductor portion 21 of the 2Nth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion 21 of the 2Nth conductor layer of the first stator slot group.

[0038] The second conductor is connected between the second end of the first conductor of the 2k-1st conductor layer of the mth stator slot group and the second end of the first conductor of the 2kth conductor layer of the m+1th stator slot group, and between the second end of the first conductor of the 2k-1st conductor layer of the 2Xth stator slot group and the second end of the first conductor of the 2kth conductor layer of the first stator slot group, where m is an integer and k is an integer.

[0039] In other words, the branch of any phase in stator winding 2 is introduced from the first end of the first conductor layer of the first group of stator slots. The second end of the first conductor part 21 of the 2k-1 conductor layer of the m group of stator slots is connected to the second end of the first conductor part 21 of the 2k conductor layer of the m+1 group of stator slots through the second conductor part 22. The first end of the first conductor part 21 of the 2k conductor layer of the z group of stator slots is welded to the first end of the first conductor part 21 of the 2k-1 conductor layer of the z+1 group of stator slots, thereby realizing the series connection between the first conductor parts 21 of every two conductor layers, and each branch will form two independent series lines in every two conductor layers.

[0040] The first end of the first conductor portion 21 of the 2kth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion 21 of the 2k+1th conductor layer of the first stator slot group. In this way, one of the two independent series lines formed in every two conductor layers of each branch can be connected in series to form the first half of the branch.

[0041] The first end of the first conductor portion 21 of the 2k+1th conductor layer of the second set of stator slots is welded to the first end of the first conductor portion 21 of the 2kth conductor layer of the first set of stator slots. In this way, the other of the two independent series lines formed in every two conductor layers of each branch can be connected in series to form the second half of the branch.

[0042] The first end of the first conductor portion 21 of the 2Nth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion 21 of the 2Nth conductor layer of the first stator slot group. This allows the first half and the second half of the branch to be connected in series to form a loop. This makes the lead-in and lead-out positions of multiple branches simultaneously located in the innermost or outermost layer of the stator winding 2, making the connection of the motor end lead wires convenient and simple, reducing the end size of the motor, and lowering the production cost of the motor.

[0043] Furthermore, the entry and exit points of multiple branches in the stator winding of the motor can be located simultaneously in the innermost or outermost adjacent stator slots of the stator winding, making the connection of the motor end lead wires convenient and simple, reducing the end size of the motor, and lowering the production cost of the motor.

[0044] Specifically, combined Figure 1 and Figure 2 In the embodiment shown, taking the first conductor forming 6 conductor layers in the stator slot 11 and each phase stator winding 2 correspondingly arranged in 6 groups of stator slots as an example, the branch of any phase in the stator winding 2 is introduced from the first end of the first conductor portion 21 of the first conductor layer of the corresponding first group of stator slots.

[0045] The first conductor portion 21 is connected between the first end and the second end. Its second end is connected to the second end of the first conductor portion 21 of the second layer of the second set of stator slots via the second conductor portion 22. The first end of the first conductor portion 21 of the second layer of the second set of stator slots is then welded to the first end of the first conductor portion 21 of the first layer of the third set of stator slots. The second end of the first conductor portion 21 of the first layer of the third set of stator slots is connected to the second end of the first conductor portion 21 of the second layer of the fourth set of stator slots via the second conductor portion 22. The first end of the first conductor portion 21 of the second layer of the fourth set of stator slots is welded to the first end of the first conductor portion 21 of the first layer of the fifth set of stator slots. The second end of the first conductor portion 21 of the first layer of the fifth set of stator slots is connected to the second end of the first conductor portion 21 of the second layer of the sixth set of stator slots via the second conductor portion 22.

[0046] The first end of the first conductor portion 21 of the second conductor layer of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the first stator slot group.

[0047] The second end of the first conductor portion 21 of the third conductor layer of the first stator slot group is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the second stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the fourth conductor layer of the second stator slot group is then welded to the first end of the first conductor portion 21 of the third conductor layer of the third stator slot group. The second end of the first conductor portion 21 of the third conductor layer of the third stator slot group is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the fourth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the fourth conductor layer of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the fifth stator slot group. The second end of the first conductor portion 21 of the third conductor layer of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the sixth stator slot group via the second conductor portion 22.

[0048] The first end of the first conductor portion 21 of the fourth conductor layer of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the first stator slot group.

[0049] The second end of the first conductor portion 21 of the fifth conductor layer of the first stator slot group is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the second stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the sixth conductor layer of the second stator slot group is then welded to the first end of the first conductor portion 21 of the fifth conductor layer of the third stator slot group. The second end of the first conductor portion 21 of the fifth conductor layer of the third stator slot group is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the fourth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the sixth conductor layer of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the fifth stator slot group. The second end of the first conductor portion 21 of the fifth conductor layer of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the sixth stator slot group via the second conductor portion 22.

[0050] The first end of the first conductor portion 21 of the sixth conductor layer of the sixth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the first group of stator slots.

[0051] The second end of the first conductor portion 21 of the sixth conductor layer of the first stator slot group is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the sixth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the fifth conductor layer of the sixth stator slot group is then welded to the first end of the first conductor portion 21 of the sixth conductor layer of the fifth stator slot group. The second end of the first conductor portion 21 of the sixth conductor layer of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the fourth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the fifth conductor layer of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the third stator slot group. The second end of the first conductor portion 21 of the sixth conductor layer of the third stator slot group is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the second stator slot group via the second conductor portion 22.

[0052] The first end of the first conductor portion 21 of the fifth conductor layer of the second group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the first group of stator slots.

[0053] The second end of the first conductor portion 21 of the fourth conductor layer of the first stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the sixth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the third conductor layer of the sixth stator slot group is then welded to the first end of the first conductor portion 21 of the fourth conductor layer of the fifth stator slot group. The second end of the first conductor portion 21 of the fourth conductor layer of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the fourth stator slot group via the second conductor portion 22. The first end of the first conductor portion 21 of the third conductor layer of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the third stator slot group. The second end of the first conductor portion 21 of the fourth conductor layer of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the second stator slot group via the second conductor portion 22.

[0054] The first end of the first conductor portion 21 of the third conductor layer of the second group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the first group of stator slots.

[0055] The second end of the first conductor portion 21 of the second conductor layer of the first group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the sixth group of stator slots via the second conductor portion 22. The first end of the first conductor portion 21 of the first conductor layer of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the second conductor layer of the fifth group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the fourth group of stator slots via the second conductor portion 22. The first end of the first conductor portion 21 of the first conductor layer of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the third group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the third group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the second group of stator slots via the second conductor portion 22.

[0056] Finally, the branch in the stator winding 2 is led out from the first end of the first conductor portion 21 of the first conductor layer of the corresponding second set of stator slots.

[0057] In other words, after the motor stator 100 is wound in the above manner, the branch of any phase in the stator winding 2 is introduced from the first end of the first conductor layer of the first group of stator slots and led out from the first end of the first conductor layer of the second group of stator slots. Thus, multiple branches under one phase are introduced into and led out from the adjacent stator slot 11 under one pole. Moreover, the introduction and exit positions of multiple branches are located at the innermost or outermost layer of the stator winding 2, which makes the connection of the motor end lead wires convenient and simple, reduces the end size of the motor, and reduces the production cost of the motor.

[0058] According to an embodiment of the present invention, the stator 100 of the motor has multiple branches whose lead-in and lead-out positions are simultaneously located in the stator slots 11 adjacent to the innermost or outermost layer of the stator winding 2, which makes the connection of the motor end lead wires convenient and simple, reduces the end size of the motor, and lowers the production cost of the motor.

[0059] Combination Figures 1-2 In the embodiment shown, the first end of the first conductor portion 21 of the first conductor layer of the first group of stator slots is formed as the inlet end 211, and the first end of the first conductor portion 21 of the first conductor layer of the second group of stator slots is formed as the outlet end 212. Thus, the inlet end 211 and outlet end 212 of multiple branches in the same phase are simultaneously located in the innermost or outermost adjacent stator slot 11 of the stator winding 2, making the connection of the motor end lead wires convenient and simple, reducing the end size of the motor, and reducing the production cost of the motor.

[0060] Except for the first conductor portion 21 at the aforementioned positions, the first end of the first conductor portion 21 at other positions is formed as a lead portion 213. The first end of the first conductor portion 21 is welded to the first end of the adjacent first conductor portion 21 through the lead portion 213 of the first conductor portion 21. At the first end of the first conductor portion 21 of the 2Nth conductor layer of the first group of stator slots, the lead portion 213 and the second conductor portion 22 are located on the same side of the first conductor portion 21. The second conductor portion 22 and the lead portion 213 connected to the first conductor portion 21 at the other first positions are located on opposite sides of the first conductor portion 21.

[0061] like Figure 1 and Figure 2 As shown, where, Figure 2In this diagram, A corresponds to the first branch 01, B corresponds to the second branch 02, C corresponds to the third branch 03, and D corresponds to the fourth branch 04. A set of stator slots corresponds to four stator slots 11, meaning each pole and each phase in this scheme corresponds to four stator slots 11. The stator slots 11 corresponding to a set of stator slots are arranged sequentially in a counter-clockwise direction, namely the first slot, the second slot, the third slot, and the fourth slot. Each phase winding includes the first branch 01, the second branch 02, the third branch 03, and the fourth branch 04. Conductors in the same branch are connected in series. The first conductor portion 21 of the first branch 01 to the fourth branch 04 is respectively provided in the same conductor layer within the four stator slots 11 of a set of stator slots.

[0062] Furthermore, the ratio of the number of stator slots 11 in the stator core 1 to the number of motor poles is Y, wherein the second conductor portion 22 rotates clockwise (e.g., Figure 1 and Figure 2 When the first conductor portion 21 connected in the OA direction (as shown) is located in the first slot of the corresponding stator slot group and the first conductor portion 21 connected in the counterclockwise direction is located in the third slot of the corresponding stator slot group, or when the first conductor portion 21 connected in the clockwise direction is located in the second slot of the corresponding stator slot group and the first conductor portion 21 connected in the counterclockwise direction is located in the fourth slot of the corresponding stator slot group, the span of the second conductor portion 22 is Y+2. When the first conductor portion 21 connected in the clockwise direction is located in the third slot of the corresponding stator slot group and the first conductor portion 21 connected in the counterclockwise direction is located in the first slot of the corresponding stator slot group, or when the first conductor portion 21 connected in the clockwise direction is located in the fourth slot of the corresponding stator slot group and the first conductor portion 21 connected in the counterclockwise direction is located in the second slot of the corresponding stator slot group, the span of the second conductor portion 22 is Y-2.

[0063] The first conductor layer 21 of the first branch 01 is provided in the first conductor layer 4k-3 of the first slot, the fourth conductor layer 4k of the second slot, the fourth conductor layer 4k-1 of the third slot and the fourth conductor layer 4k-2 of the fourth slot of the fourth m-3 group of stator slots, as well as in the first conductor layer 4k of the first slot, the fourth conductor layer 4k-3 of the second slot, the fourth conductor layer 4k-2 of the third slot and the fourth conductor layer 4k-1 of the fourth slot of the fourth m-3 group of stator slots, as well as in the first conductor layer 4k-1 of the first slot, the fourth conductor layer 4k of the second slot, the fourth conductor layer 4k-3 of the third slot and the fourth conductor layer 4k-2 of the fourth slot of the fourth m group of stator slots.

[0064] Specifically, taking the example of a first conductor forming 6 conductor layers in the stator slot 11, with each phase stator winding 2 correspondingly arranged in 6 groups of stator slots.

[0065] In this case, the first branch 01 of one phase in the stator winding 2 is introduced from the first end of the first conductor portion 21 of the first conductor layer of the first slot of the corresponding first group of stator slots.

[0066] The second end of the first conductor portion 21 of the first conductor layer of the first slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the third slot of the second group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the second conductor layer of the third slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the first conductor layer of the third slot of the third group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the third slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the first slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the second conductor layer of the first slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the first conductor layer of the first slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the first slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the second slot of the third slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2.

[0067] The first end of the first conductor portion 21 of the second conductor layer of the third slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the third slot of the first stator slot group.

[0068] The second end of the first conductor portion 21 of the third conductor layer of the third slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the first slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the fourth conductor layer of the first slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the third conductor layer of the first slot of the third group of stator slots. The second end of the first conductor portion 21 of the third conductor layer of the first slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the first slot of the third group of stator slots via a second conductor portion 22 with a span of Y+2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the fourth conductor layer of the third slot of the fourth stator slot group. The first end of the first conductor section 21 of the fourth conductor layer of the third slot of the fourth stator slot group is welded to the first end of the first conductor section 21 of the third conductor layer of the third slot of the fifth stator slot group. The second end of the first conductor section 21 of the third conductor layer of the third slot of the fifth stator slot group is connected to the second end of the first conductor section 21 of the fourth conductor layer of the first slot of the sixth stator slot group through the second conductor section 22 with a span of Y-2.

[0069] The first end of the first conductor portion 21 of the fourth conductor layer of the first slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the first slot of the first stator slot group.

[0070] The second end of the first conductor portion 21 of the fifth conductor layer of the first slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the third slot in the second group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the sixth conductor layer of the third slot in the second group of stator slots is then welded to the first end of the first conductor portion 21 of the fifth conductor layer of the third slot in the third group of stator slots. The second end of the first conductor portion 21 of the fifth conductor layer of the third slot in the third group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the sixth conductor layer of the first slot of the fourth stator slot group. The first end of the first conductor section 21 of the sixth conductor layer of the first slot of the fourth stator slot group is welded to the first end of the first conductor section 21 of the fifth conductor layer of the first slot of the fifth stator slot group. The second end of the first conductor section 21 of the fifth conductor layer of the first slot of the fifth stator slot group is connected to the second end of the first conductor section 21 of the sixth conductor layer of the third slot of the sixth stator slot group through the second conductor section 22 with a span of Y+2.

[0071] The first end of the first conductor portion 21 of the sixth conductor layer of the third slot of the sixth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the first group of stator slots.

[0072] The span after the first conductor portion 21 of the sixth conductor layer of the third slot of the sixth group of stator slots is connected to the lead portion 213 provided on the first conductor portion 21 of the sixth conductor layer of the fourth slot of the first group of stator slots is Y+1, and the span after the lead portions 213 of the other first conductor portions 21 on the first branch 01 are connected is Y.

[0073] The second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the second slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the sixth conductor layer of the second slot of the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the fourth group of stator slots. The first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the third group of stator slots. The second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the second slot of the second group of stator slots through the second conductor portion 22 with a span of Y+2.

[0074] The first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the second slot of the first group of stator slots.

[0075] The second end of the first conductor portion 21 of the fourth conductor layer of the second slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the fourth slot in the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the third conductor layer of the fourth slot in the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the fourth conductor layer of the fourth slot in the fifth group of stator slots. The second end of the first conductor portion 21 of the fourth conductor layer of the fourth slot in the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the third conductor layer of the second slot of the fourth stator slot group. The first end of the first conductor portion 21 of the third conductor layer of the second slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the second slot of the third stator slot group. The second end of the first conductor portion 21 of the fourth conductor layer of the second slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the fourth slot of the second stator slot group through the second conductor portion 22 with a span of Y-2.

[0076] The first end of the first conductor portion 21 of the third conductor layer of the fourth slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the first group of stator slots.

[0077] The second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the second slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the first conductor layer of the second slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the second conductor layer of the second slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the second slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the fourth slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the third group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the second slot of the second group of stator slots via a second conductor portion 22 with a span of Y+2.

[0078] Finally, the first branch 01 in the phase stator winding 2 is led out from the first end of the first conductor portion 21 of the first conductor layer of the second slot of the corresponding second set of stator slots.

[0079] Furthermore, the first conductor layer 21 of the second branch 02 is provided in the first conductor layer 4k-1 of the first slot, the fourth conductor layer 4k-2 of the second slot, the fourth conductor layer 4k-3 of the third slot and the fourth conductor layer 4k of the fourth slot of the stator slot group 4m-3, as well as the first conductor layer 4k-2 of the first slot, the fourth conductor layer 4k-1 of the second slot, the fourth conductor layer 4k of the third slot and the fourth conductor layer 4k-3 of the fourth slot of the stator slot group 4m-2, as well as the first conductor layer 4k-3 of the first slot, the fourth conductor layer 4k-2 of the second slot, the fourth conductor layer 4k-1 of the third slot and the fourth conductor layer 4k of the fourth slot of the stator slot group 4m-1, as well as the first conductor layer 4k of the first slot, the fourth conductor layer 4k-3 of the second slot, the fourth conductor layer 4k-2 of the third slot and the fourth conductor layer 4k of the fourth slot of the stator slot group 4m.

[0080] Specifically, the second branch 02 of one phase in the stator winding 2 is introduced from the first end of the first conductor portion 21 of the first conductor layer of the third slot of the corresponding first group of stator slots.

[0081] The second end of the first conductor portion 21 of the first conductor layer of the third slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the first slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the second conductor layer of the first slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the first conductor layer of the first slot of the third group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the first slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the third slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the second conductor layer of the third slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the first conductor layer of the first slot of the third slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the first conductor layer of the third slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the first slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y-2.

[0082] The first end of the first conductor portion 21 of the second conductor layer of the first slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the first slot of the first stator slot group.

[0083] The second end of the first conductor portion 21 of the third conductor layer of the first slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the third slot in the second group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the fourth conductor layer of the third slot in the second group of stator slots is then welded to the first end of the first conductor portion 21 of the third conductor layer of the third slot in the third group of stator slots. The second end of the first conductor portion 21 of the third conductor layer of the third slot in the third group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the third slot in the third group of stator slots via a second conductor portion 22 with a span of Y-2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the fourth conductor layer of the first slot of the fourth stator slot group. The first end of the first conductor section 21 of the fourth conductor layer of the first slot of the fourth stator slot group is welded to the first end of the first conductor section 21 of the third conductor layer of the first slot of the fifth stator slot group. The second end of the first conductor section 21 of the third conductor layer of the first slot of the fifth stator slot group is connected to the second end of the first conductor section 21 of the fourth conductor layer of the third slot of the sixth stator slot group through the second conductor section 22 with a span of Y+2.

[0084] The first end of the first conductor portion 21 of the fourth conductor layer of the third slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the third slot of the first stator slot group.

[0085] The second end of the first conductor portion 21 of the fifth conductor layer of the third slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the first slot in the second group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the sixth conductor layer of the first slot in the second group of stator slots is then welded to the first end of the first conductor portion 21 of the fifth conductor layer of the first slot in the third group of stator slots. The second end of the first conductor portion 21 of the fifth conductor layer of the first slot in the third group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the third slot of the fourth stator slot group. The first end of the first conductor portion 21 of the sixth conductor layer of the third slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the third slot of the fifth stator slot group. The second end of the first conductor portion 21 of the fifth conductor layer of the third slot of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the first slot of the sixth stator slot group through the second conductor portion 22 with a span of Y-2.

[0086] The first end of the first conductor portion 21 of the sixth conductor layer of the first slot of the sixth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the first group of stator slots.

[0087] The span after the first conductor portion 21 of the sixth conductor layer of the first slot of the sixth group of stator slots is connected to the lead portion 213 provided on the first conductor portion 21 of the sixth conductor layer of the second slot of the first group of stator slots is Y+1, and the span after the lead portion 213 of the other first conductor portions 21 on the second branch 02 is connected is Y.

[0088] The second end of the first conductor portion 21 of the sixth conductor layer of the second slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot in the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot in the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot in the fifth group of stator slots. The second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot in the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the second slot of the fourth stator slot group. The first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the third stator slot group. The second end of the first conductor portion 21 of the sixth conductor layer of the second slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the second stator slot group through the second conductor portion 22 with a span of Y-2.

[0089] The first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the first group of stator slots.

[0090] The second end of the first conductor portion 21 of the fourth conductor layer of the fourth slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the second slot in the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the third conductor layer of the second slot in the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the fourth conductor layer of the second slot in the fifth group of stator slots. The second end of the first conductor portion 21 of the fourth conductor layer of the second slot in the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the third conductor layer of the fourth slot of the fourth group of stator slots. The first end of the first conductor portion 21 of the third conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the third group of stator slots. The second end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the second slot of the second group of stator slots through the second conductor portion 22 with a span of Y+2.

[0091] The first end of the first conductor portion 21 of the third conductor layer of the second slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the second slot of the first group of stator slots.

[0092] The second end of the first conductor portion 21 of the second conductor layer of the second slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the fourth slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the second slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the first conductor layer of the second slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the second slot of the third group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the second slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the first conductor layer of the fourth slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2.

[0093] Finally, the second branch 02 in the phase stator winding 2 is led out from the first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the corresponding second set of stator slots.

[0094] Furthermore, the first conductor layer 21 of the third branch 03 is provided in the first conductor layer of the first slot, the fourth conductor layer of the second slot, the fourth conductor layer of the third slot, and the fourth conductor layer of the fourth slot in the 4m-3 group of stator slots, as well as the first conductor layer 4k-3 of the first slot, the fourth conductor layer 4k-3 of the second slot, the fourth conductor layer 4k-1 of the third slot, and the fourth conductor layer 4k-2 of the fourth slot in the 4m-2 group of stator slots, as well as the first conductor layer 4k-3 of the first slot, the fourth conductor layer 4k-1 of the second slot, the fourth conductor layer 4k-2 of the third slot, and the fourth conductor layer 4k-3 of the fourth slot in the 4m-1 group of stator slots, as well as the first conductor layer 4k-1 of the first slot, the fourth conductor layer 4k-2 of the second slot, the fourth conductor layer 4k-3 of the third slot, and the fourth conductor layer 4k-3 of the fourth slot in the 4m group of stator slots.

[0095] Specifically, the third branch 03 of one phase in the stator winding 2 is introduced from the first end of the first conductor portion 21 of the first conductor layer of the second slot of the corresponding first group of stator slots.

[0096] The second end of the first conductor portion 21 of the first conductor layer of the second slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the second group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the third group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the fourth slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the second slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the second conductor layer of the second slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the first conductor layer of the second slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the first conductor layer of the second slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2.

[0097] The first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the fourth slot of the first stator slot group.

[0098] The second end of the first conductor portion 21 of the third conductor layer of the fourth slot of the first stator slot group is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the second slot of the second stator slot group via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the fourth conductor layer of the second slot of the second stator slot group is then welded to the first end of the first conductor portion 21 of the third conductor layer of the second slot of the third stator slot group. The second end of the first conductor portion 21 of the third conductor layer of the second slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the second slot of the third stator slot group via a second conductor portion 22 with a span of Y+2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the fourth conductor layer of the fourth slot of the fourth group of stator slots. The first end of the first conductor section 21 of the fourth conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor section 21 of the third conductor layer of the fourth slot of the fifth group of stator slots. The second end of the first conductor section 21 of the third conductor layer of the fourth slot of the fifth group of stator slots is connected to the second end of the first conductor section 21 of the fourth conductor layer of the second slot of the sixth group of stator slots through the second conductor section 22 with a span of Y-2.

[0099] The first end of the first conductor portion 21 of the fourth conductor layer of the second slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the first stator slot group.

[0100] The second end of the first conductor portion 21 of the fifth conductor layer of the second slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot in the second group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot in the second group of stator slots is then welded to the first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot in the third group of stator slots. The second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot in the third group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the second slot of the fourth stator slot group. The first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the fifth stator slot group. The second end of the first conductor portion 21 of the fifth conductor layer of the second slot of the fifth stator slot group is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the sixth stator slot group through the second conductor portion 22 with a span of Y+2.

[0101] The first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the sixth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the third slot of the first group of stator slots.

[0102] The span after the first conductor portion 21 of the sixth conductor layer of the fourth slot of the sixth group of stator slots is connected to the lead portion 213 provided on the first conductor portion 21 of the sixth conductor layer of the third slot of the first group of stator slots is Y-1, and the span after the lead portions 213 of the other first conductor portions 21 on the third branch 03 are connected is Y.

[0103] The second end of the first conductor portion 21 of the sixth conductor layer of the third slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the first slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the fifth conductor layer of the first slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the sixth conductor layer of the first slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the sixth conductor layer of the first slot of the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the third slot of the fourth stator slot group. The first end of the first conductor portion 21 of the fifth conductor layer of the third slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the third slot of the third stator slot group. The second end of the first conductor portion 21 of the sixth conductor layer of the third slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the first slot of the second stator slot group through the second conductor portion 22 with a span of Y+2.

[0104] The first end of the first conductor portion 21 of the fifth conductor layer of the first slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the first slot of the first group of stator slots.

[0105] The second end of the first conductor portion 21 of the fourth conductor layer of the first slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the third slot in the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the third conductor layer of the third slot in the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the fourth conductor layer of the third slot in the fifth group of stator slots. The second end of the first conductor portion 21 of the fourth conductor layer of the third slot in the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the third conductor layer of the first slot of the fourth stator slot group. The first end of the first conductor portion 21 of the third conductor layer of the first slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the first slot of the third stator slot group. The second end of the first conductor portion 21 of the fourth conductor layer of the first slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the third slot of the second stator slot group through the second conductor portion 22 with a span of Y-2.

[0106] The first end of the first conductor portion 21 of the third conductor layer of the third slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the third slot of the first group of stator slots.

[0107] The second end of the first conductor portion 21 of the second conductor layer of the third slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the first slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the first conductor layer of the first slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the second conductor layer of the first slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the first slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the third slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the first conductor layer of the third slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the third slot of the third group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the third slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the first slot of the second group of stator slots via a second conductor portion 22 with a span of Y+2.

[0108] Finally, the third branch 03 in the phase stator winding 2 is led out from the first end of the first conductor portion 21 of the first conductor layer of the first slot of the corresponding second set of stator slots.

[0109] Furthermore, the first conductor layer 21 of the fourth branch 04 is provided in the first conductor layer 4k-2 of the first slot, the fourth conductor layer 4k-1 of the second slot, the fourth conductor layer 4k of the third slot, and the fourth conductor layer 4k-3 of the stator slot group 4m-3, as well as the first conductor layer 4k-1 of the first slot, the fourth conductor layer 4k-2 of the second slot, the fourth conductor layer 4k-3 of the third slot, and the fourth conductor layer 4k of the fourth slot of the stator slot group 4m-2, as well as the first conductor layer 4k-2 of the first slot, the fourth conductor layer 4k-3 of the second slot, the fourth conductor layer 4k of the third slot, and the fourth conductor layer 4k-1 of the fourth slot of the stator slot group 4m-1, as well as the first conductor layer 4k-3 of the first slot, the fourth conductor layer 4k of the second slot, the fourth conductor layer 4k-1 of the third slot, and the fourth conductor layer 4k-2 of the fourth slot of the stator slot group 4m.

[0110] Specifically, the fourth branch 04 of one phase in the stator winding 2 is introduced from the first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the corresponding first group of stator slots.

[0111] The second end of the first conductor portion 21 of the first conductor layer of the fourth slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the second slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the second conductor layer of the second slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the first conductor layer of the second slot of the third group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the second slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the fourth slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the second conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the first conductor layer of the fourth slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the first conductor layer of the fourth slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the second conductor layer of the second slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y-2.

[0112] The first end of the first conductor portion 21 of the second conductor layer of the second slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the third conductor layer of the second slot of the first stator slot group.

[0113] The second end of the first conductor portion 21 of the third conductor layer of the second slot of the first stator slot group is connected to the second end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the second stator slot group via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the second stator slot group is then welded to the first end of the first conductor portion 21 of the third conductor layer of the fourth slot of the third stator slot group. The second end of the first conductor portion 21 of the third conductor layer of the fourth slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the fourth slot of the third stator slot group via a second conductor portion 22 with a span of Y-2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the fourth conductor layer of the second slot of the fourth stator slot group. The first end of the first conductor section 21 of the fourth conductor layer of the second slot of the fourth stator slot group is welded to the first end of the first conductor section 21 of the third conductor layer of the second slot of the fifth stator slot group. The second end of the first conductor section 21 of the third conductor layer of the second slot of the fifth stator slot group is connected to the second end of the first conductor section 21 of the fourth conductor layer of the fourth slot of the sixth stator slot group through the second conductor section 22 with a span of Y+2.

[0114] The first end of the first conductor portion 21 of the fourth conductor layer of the fourth slot of the sixth stator slot group is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the first stator slot group.

[0115] The second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the second slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the second group of stator slots is then welded to the first end of the first conductor portion 21 of the fifth conductor layer of the second slot of the third group of stator slots. The second end of the first conductor portion 21 of the fifth conductor layer of the second slot of the third group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the fourth group of stator slots. The first end of the first conductor portion 21 of the sixth conductor layer of the fourth slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the fifth conductor layer of the fourth slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the sixth conductor layer of the second slot of the sixth group of stator slots through the second conductor portion 22 with a span of Y-2.

[0116] The first end of the first conductor portion 21 of the sixth conductor layer of the second slot of the sixth group of stator slots is welded to the first end of the first conductor portion 21 of the sixth conductor layer of the first slot of the first group of stator slots.

[0117] The span after the first conductor portion 21 of the sixth conductor layer of the second slot of the sixth group of stator slots is connected to the lead portion 213 provided on the first conductor portion 21 of the sixth conductor layer of the first slot of the first group of stator slots is Y-1, and the span after the lead portion 213 of the other first conductor portions 21 on the fourth branch 04 is connected is Y.

[0118] The second end of the first conductor portion 21 of the sixth conductor layer of the first slot in the first group of stator slots is connected to the second end of the first conductor portion 21 of the fifth conductor layer of the third slot in the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the fifth conductor layer of the third slot in the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the sixth conductor layer of the third slot in the fifth group of stator slots. The second end of the first conductor portion 21 of the sixth conductor layer of the third slot in the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y+2. The second conductor section 22 is connected to the second end of the first conductor section 21 of the fifth conductor layer of the first slot of the fourth stator slot group. The first end of the first conductor section 21 of the fifth conductor layer of the first slot of the fourth stator slot group is welded to the first end of the first conductor section 21 of the sixth conductor layer of the first slot of the third stator slot group. The second end of the first conductor section 21 of the sixth conductor layer of the first slot of the third stator slot group is connected to the second end of the first conductor section 21 of the fifth conductor layer of the third slot of the second stator slot group through the second conductor section 22 with a span of Y-2.

[0119] The first end of the first conductor portion 21 of the fifth conductor layer of the third slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the third slot of the first group of stator slots.

[0120] The second end of the first conductor portion 21 of the fourth conductor layer of the third slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the third conductor layer of the first slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the third conductor layer of the first slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the fourth conductor layer of the first slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the fourth conductor layer of the first slot of the fifth group of stator slots is connected via a second conductor portion 22 with a span of Y-2. The second conductor portion 22 is connected to the second end of the first conductor portion 21 of the third conductor layer of the third slot of the fourth stator slot group. The first end of the first conductor portion 21 of the third conductor layer of the third slot of the fourth stator slot group is welded to the first end of the first conductor portion 21 of the fourth conductor layer of the third slot of the third stator slot group. The second end of the first conductor portion 21 of the fourth conductor layer of the third slot of the third stator slot group is connected to the second end of the first conductor portion 21 of the third conductor layer of the first slot of the second stator slot group through the second conductor portion 22 with a span of Y+2.

[0121] The first end of the first conductor portion 21 of the third conductor layer of the first slot of the second group of stator slots is welded to the first end of the first conductor portion 21 of the second conductor layer of the first slot of the first group of stator slots.

[0122] The second end of the first conductor portion 21 of the second conductor layer of the first slot of the first group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the third slot of the sixth group of stator slots via a second conductor portion 22 with a span of Y-2. The first end of the first conductor portion 21 of the first conductor layer of the third slot of the sixth group of stator slots is then welded to the first end of the first conductor portion 21 of the second conductor layer of the third slot of the fifth group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the third slot of the fifth group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the first slot of the fourth group of stator slots via a second conductor portion 22 with a span of Y+2. The first end of the first conductor portion 21 of the first conductor layer of the first slot of the fourth group of stator slots is welded to the first end of the first conductor portion 21 of the first conductor layer of the first slot of the third group of stator slots. The second end of the first conductor portion 21 of the second conductor layer of the first slot of the third group of stator slots is connected to the second end of the first conductor portion 21 of the first conductor layer of the first slot of the second group of stator slots via a second conductor portion 22 with a span of Y-2.

[0123] Finally, the fourth branch 04 in the stator winding 2 is led out from the first end of the first conductor portion 21 of the first conductor layer of the third slot of the corresponding second set of stator slots.

[0124] In summary, by designing the arrangement of the stator windings 2 in the stator slots 11 as described above, the voltage of each branch under each phase is kept balanced, thereby effectively solving the circulating current problem caused by voltage imbalance and enabling the motor to achieve optimal performance.

[0125] like Figure 6 and Figure 7 As shown, the second conductor portion 22 with a span of Y-2 and the first conductor portion 21 connected at both ends together constitute the first flat wire coil 10, and the second conductor portion 22 with a span of Y+2 and the first conductor portion 21 connected at both ends together constitute the second flat wire coil 20. Therefore, the stator winding 2 can use only two types of flat wire coils, namely the first flat wire coil 10 and the second flat wire coil 20, making the manufacturing process of the motor stator 100 uniform, eliminating the need for tooling or molds for different types of flat wire coils, and reducing production costs.

[0126] The end of the second flat wire coil 20 is flattened, specifically, refer to... Figures 3-5 , Figure 4 This is a partial structural diagram of a motor in which the end of the second flat wire coil 20 is not flattened. Figure 5 A partial structural diagram of the motor after the end of the second flat wire coil 20 is flattened. By flattening the end of the second flat wire coil 20, which has a relatively high twist end, the size of the stator winding 2 end can be reduced, the size of the motor can be reduced, and the weight of the motor can be reduced, which is beneficial to weight reduction.

[0127] Reference Figures 1-5 In each branch, the first flat wire coil 10 and the second flat wire coil 20 are connected alternately to keep the voltage of each branch under each phase balanced, thereby effectively solving the circulating current problem caused by voltage imbalance and making the motor performance optimal.

[0128] In some embodiments, the first branch 01, the second branch 02, the third branch 03, and the fourth branch 04 can be connected in series or in parallel, or two branches can be connected in series and then in parallel. Since the lead-in and lead-out positions of multiple branches in the same phase of the motor stator 100 are located in adjacent stator slots 11 of the innermost or outermost layer of the stator winding 2, the connection of the motor end lead wires is convenient and simple. The wiring process of connecting the first branch 01, the second branch 02, the third branch 03, and the fourth branch 04 in series or in parallel is more convenient, reducing the production cost of the motor.

[0129] In this way, the first branch and the fourth branch can be connected in series to form a branch, the second branch and the third branch can be connected in series to form a branch, and then the two branches can be connected in parallel. Thus, the conductor lengths of the two parallel branches can be made the same.

[0130] According to some embodiments of the present invention, the stator winding 2 includes a three-phase winding with a star connection or a delta connection, which is not limited herein.

[0131] The motor according to an embodiment of the present invention includes a motor stator 100 according to the above embodiment. By employing the above-described motor stator 100, the performance of the motor is improved.

[0132] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0133] Other aspects of the motor's construction are already known to those skilled in the art and are therefore not described in detail here.

[0134] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A motor stator, characterized in that, include: The stator core and stator windings are provided. The inner wall of the stator core has multiple axially penetrating stator slots evenly distributed circumferentially. The stator windings are sequentially arranged around the stator core in the multiple stator slots, forming 2N conductor layers from the inside out or from the outside in, where N is a positive integer. The stator windings include multiple phases. The multiple stator slots can be divided into multiple groups. Each group of stator slots corresponds to one stage of a phase of the stator winding. Each phase of the stator winding is correspondingly arranged in 2X groups of stator slots, where X is an integer. All corresponding stator slot groups are arranged sequentially in a counter-clockwise direction. The stator windings include: A first conductor portion is inserted into the stator slot and forms a conductor layer within the stator slot. The first end of the first conductor portion of the 2kth conductor layer of the zth stator slot group is welded to the first end of the first conductor portion of the 2k-1th conductor layer of the z+1th stator slot group, where z is an integer not equal to 1. The first end of the first conductor portion of the 2kth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion of the 2k+1th conductor layer of the first stator slot group. The first end of the first conductor portion of the 2k+1th conductor layer of the second stator slot group is welded to the first end of the first conductor portion of the 2kth conductor layer of the first stator slot group. The first end of the first conductor portion of the 2Nth conductor layer of the 2Xth stator slot group is welded to the first end of the first conductor portion of the 2Nth conductor layer of the first stator slot group. The second conductor portion is connected between the second end of the first conductor portion of the 2k-1th conductor layer of the mth stator slot group and the second end of the first conductor portion of the 2kth conductor layer of the m+1th stator slot group, and between the second end of the first conductor portion of the 2k-1th conductor layer of the 2Xth stator slot group and the second end of the first conductor portion of the 2kth conductor layer of the first stator slot group, where m is an integer and k is an integer.

2. The motor stator as described in claim 1, characterized in that, The first end of the first conductor portion of the first conductor layer of the first group of stator slots is formed as an inlet end, the first end of the first conductor portion of the first conductor layer of the second group of stator slots is formed as an outlet end, and the first end of the remaining first conductor portions is formed as a lead portion.

3. The motor stator as described in claim 1, characterized in that, One set of stator slots corresponds to four stator slots. The stator slots corresponding to the set of stator slots are arranged in a counterclockwise direction as the first slot, the second slot, the third slot, and the fourth slot, respectively. Each phase winding includes a first branch, a second branch, a third branch, and a fourth branch. Conductors within the same branch are connected in series. In a set of stator slots, the first conductor portions of the first branch to the fourth branch are respectively provided in the same conductor layer within the four stator slots. Among them, the first conductor layer of the first slot, the 4k-3 layer of the first slot, the 4k layer of the second slot, the 4k-1 layer of the third slot and the 4k-2 layer of the fourth slot of the 4m-3 group of stator slots, and the first conductor layer of the first slot, the 4k-3 layer of the second slot, the 4k-2 layer of the third slot and the 4k-1 layer of the fourth slot of the 4m-2 group of stator slots, and the first conductor layer of the first slot, the 4k-1 layer of the first slot, the 4k layer of the second slot, the 4k-3 layer of the third slot and the 4k-2 layer of the fourth slot of the 4m-1 group of stator slots, and the first conductor layer of the first slot, the 4k-1 layer of the second slot, the 4k-3 layer of the third slot and the 4k-2 layer of the fourth slot of the 4m group of stator slots, are provided with the first conductor portion of the first branch; The first conductor layer of the second branch is provided in the first conductor layer of the first slot, the fourth conductor layer of the second slot, the fourth conductor layer of the third slot, and the fourth conductor layer of the fourth slot in the 4m-3 group of stator slots; The first conductor layer of the third branch is provided in the first conductor layer of the first slot of the 4m-3 group stator slot, the 4k-3rd conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-1st conductor layer of the fourth slot; and in the first slot of the 4m-3 group stator slot, the 4k-3rd conductor layer of the second slot, the 4k-1st conductor layer of the third slot and the 4k-2nd conductor layer of the fourth slot; and in the first slot of the 4m-1 group stator slot, the 4k-1st conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-3rd conductor layer of the fourth slot; and in the first slot of the 4m group stator slot, the 4k-1st conductor layer of the second slot, the 4k-2nd conductor layer of the third slot and the 4k-3rd conductor layer of the fourth slot; The first conductor portion of the fourth branch is provided in the 4k-2 layer conductor layer of the first slot, the 4k-1 layer conductor layer of the second slot, the 4k layer conductor layer of the third slot, and the 4k-3 layer conductor layer of the fourth slot in the 4m-3 group of stator slots, as well as in the 4k-1 layer conductor layer of the first slot, the 4k-2 layer conductor layer of the second slot, the 4k-3 layer conductor layer of the third slot, and the 4k layer conductor layer of the fourth slot in the 4m-2 group of stator slots, as well as in the 4k-2 layer conductor layer of the first slot, the 4k-3 layer conductor layer of the second slot, the 4k layer conductor layer of the third slot, and the 4k-1 layer conductor layer of the fourth slot in the 4m group of stator slots, as well as in the 4k-3 layer conductor layer of the first slot, the 4k layer conductor layer of the second slot, the 4k-1 layer conductor layer of the third slot, and the 4k-2 layer conductor layer of the fourth slot in the 4m group of stator slots.

4. The motor stator as described in claim 3, characterized in that, The ratio of the number of stator slots in the stator core to the number of motor poles is Y. Wherein, if the first conductor portion connected to the second conductor portion in a clockwise direction is located in the first slot of the stator slot group and the first conductor portion connected in a counterclockwise direction is located in the third slot of the stator slot group, or if the first conductor portion connected to the second conductor portion in a clockwise direction is located in the second slot of the stator slot group and the first conductor portion connected in a counterclockwise direction is located in the fourth slot of the stator slot group, the span of the second conductor portion is Y+2; if the first conductor portion connected to the second conductor portion in a clockwise direction is located in the third slot of the stator slot group and the first conductor portion connected in a counterclockwise direction is located in the first slot of the stator slot group, or if the first conductor portion connected to the second conductor portion in a clockwise direction is located in the fourth slot of the stator slot group and the first conductor portion connected in a counterclockwise direction is located in the second slot of the stator slot group, the span of the second conductor portion is Y-2.

5. The motor stator as described in claim 4, characterized in that, The second conductor portion with a span of Y-2 and the first conductor portion connected at both ends together constitute a first flat wire coil, and the second conductor portion with a span of Y+2 and the first conductor portion connected at both ends together constitute a second flat wire coil.

6. The motor stator as described in claim 5, characterized in that, The end of the second flat wire coil is flattened.

7. The motor stator as described in claim 5, characterized in that, In each branch, the first flat wire coil and the second flat wire coil are connected alternately.

8. The motor stator as described in claim 3, characterized in that, The first branch, the second branch, the third branch, and the fourth branch can be connected in series or in parallel, or two branches can be connected in series and then in parallel.

9. The motor stator as described in claim 1, characterized in that, The stator winding includes a three-phase winding with a star connection or a delta connection.

10. An electric motor, characterized in that, Includes the motor stator as described in any one of claims 1-9.

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