A motor stator and a motor

Abstract

This invention provides a motor stator and a motor, comprising: a stator core having multiple core slots formed on the radial inner surface of the stator core and spaced apart by a predetermined slot pitch along the circumferential direction of the stator core; and a stator winding including multiple phase windings mounted on the stator core and forming an even number of layers in the radial direction of the stator core. The invention is characterized in that each phase winding includes a first conductor group, multiple second conductor groups, multiple third conductor groups, and a fourth conductor group connected in series. The invention utilizes fewer conductor types and has a simpler arrangement, eliminating the need for busbars and busbars. This ensures that the twisting direction and twisting slot pitch of the welded ends extending within the slots in the same radial layer of the stator core are consistent, allowing the lead ends and neutral points of each phase winding to be located in any slot and layer in the same radial direction. This reduces the complexity of the manufacturing process, lowers production costs, and improves processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more specifically, to an electric motor stator and an electric motor. Background Technology

[0002] The stator winding includes multiple hairpin coils, which are inserted into the slots of the stator core in a certain arrangement to form the single-phase or multi-phase winding of the motor. The existing technology uses a variety of hairpin coils with complex arrangements, requiring a large number of busbars and busbars to connect the branches and neutral points of each phase winding. In the existing technology, more than 90% of stator windings have more than or equal to 2 slots per pole per phase. However, if the stator winding is connected in series between phases, the twisting direction of the welded ends in the same layer of slots or the spacing between the twisted slots will be inconsistent, resulting in complex manufacturing process, difficult forming, high production cost, and low processing efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a motor stator and motor that uses fewer types of conductors and has a simpler arrangement. It eliminates the need for busbars and busbars, and ensures that the twisting direction and twisting slot spacing of the welded ends extending radially within the same layer of the stator core slots are consistent. This allows the lead ends and neutral points of each phase winding to be located in any slot and layer of the same radial direction, reducing the complexity of the manufacturing process, lowering production costs, and improving processing efficiency.

[0004] To achieve the above objectives, according to one aspect of the present invention, a motor stator is provided, comprising:

[0005] The stator core has a plurality of core slots formed on the radial inner surface of the stator core and spaced apart by a predetermined slot pitch along the circumferential direction of the stator core.

[0006] The stator winding includes multiple phase windings mounted on the stator core, and forms an even number of layers in the radial direction of the stator core;

[0007] Its characteristic is that each phase winding consists of multiple conductor groups connected in series along the circumference of the stator core;

[0008] The multiple conductor groups of this phase winding include: a first conductor group, multiple second conductor groups, multiple third conductor groups, and a fourth conductor group;

[0009] The first conductor group includes three identical first conductors, each first conductor including two slot interiors located inside different iron core slots, a plug end located outside the iron core slot, and two welding ends located outside the iron core slot and extending in the same direction. The two slot interiors of each first conductor in the first conductor group are located inside the outermost radial layer of the stator iron core.

[0010] The second conductor group includes: three identical second conductors, each second conductor including two slot interiors located inside different core slots, a plug-in terminal located outside the core slot, and two welded terminals located outside the core slot and extending in opposite directions. The two slot interiors of each second conductor in each second conductor group are respectively located in radially adjacent N layers and N+1 layers of the stator core, where N is an odd number. The pitch between the two slot interiors of the second conductor in the second conductor group is a long pitch, or the pitch between the two slot interiors of the second conductor in the second conductor group is a short pitch.

[0011] The third conductor group includes three conductors. Each conductor in the third conductor group includes two slot interiors located inside different iron core slots, a plug end located outside the iron core slot, and two welding ends located outside the iron core slot and extending in opposite directions. The two slot interiors of each conductor in the third conductor group are located in the N+1 and N+2 layers of the stator core radially adjacent to each other, respectively.

[0012] The fourth conductor group includes: two fourth large conductors and one fourth small conductor, or the fourth conductor group includes: one fourth large conductor and two fourth small conductors; each conductor of the fourth conductor group includes two slot interiors located inside different iron core slots, a plug end located outside the iron core slot, and two weld ends located outside the iron core slot and extending in the same direction, and the two slot interiors of each conductor of the fourth conductor group are both located in the innermost radial layer of the stator iron core; the extension direction of each weld end of each conductor of the fourth conductor group is opposite to the extension direction of each weld end of each conductor of the first conductor group.

[0013] Furthermore, the pitch between the two slots of the first conductor in the first conductor group is a whole pitch, the pitch between the two slots of the fourth large conductor in the fourth conductor group is a long pitch, and the pitch between the two slots of the fourth small conductor in the fourth conductor group is a short pitch.

[0014] Furthermore, the phase winding has multiple first connection welding ends and multiple second connection welding ends connected together. The welding ends located in the M-1 layer of the stator core that are radially adjacent are the first connection welding ends, and the welding ends located in the M layer of the stator core that are radially adjacent are the second connection welding ends, where M is an even number.

[0015] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

[0016] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

[0017] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a whole pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

[0018] Furthermore, when the pitch between the two slots of the second conductor of the second conductor group is a long pitch; the three conductors of one third conductor group of the phase winding are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

[0019] Furthermore, when the pitch between the two slots of the second conductor of the second conductor group is a long pitch; the three conductors of one third conductor group of the phase winding are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a whole pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

[0020] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

[0021] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

[0022] Furthermore, when the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

[0023] Furthermore, when the pitch between the two slots of the second conductor of the second conductor group is a short pitch; the three conductors of one third conductor group of the phase winding are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

[0024] Furthermore, when the pitch between the two slots of the second conductor of the second conductor group is a short pitch; the three conductors of one third conductor group of the phase winding are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a whole pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

[0025] According to another aspect of the present invention, an electric motor is provided, comprising the above-described motor stator.

[0026] According to the technical solution of this invention, a motor stator and a motor are provided. The stator core has multiple core slots formed on the radial inner surface of the stator core and spaced apart by a predetermined slot pitch along the circumferential direction of the stator core. The stator winding includes multiple phase windings mounted on the stator core and forming an even number of layers in the radial direction of the stator core. The key feature is that each phase winding consists of multiple conductor groups connected in series along the circumferential direction of the stator core. The multiple conductor groups of the phase winding include: a first conductor group, multiple second conductor groups, multiple third conductor groups, and a fourth conductor group; wherein, the first conductor group... The first conductor group comprises: three identical first conductors, each first conductor including two slot interiors located inside different core slots, a wire insertion terminal located outside the core slot, and two welded terminals located outside the core slot and extending in the same direction. The two slot interiors of each first conductor in the first conductor group are located within the outermost radial layer of the stator core. The second conductor group comprises: three identical second conductors, each second conductor including two slot interiors located inside different core slots, a wire insertion terminal located outside the core slot, and two welded terminals located outside the core slot and extending in opposite directions. Each second conductor in each second conductor group... The two slots of the first conductor are located within the Nth and N+1th radially adjacent layers of the stator core, respectively, where N is an odd number. The pitch between the two slots of the second conductor in the second conductor group is a long pitch, or the pitch between the two slots of the second conductor in the second conductor group is a short pitch. The third conductor group includes three conductors, each conductor of the third conductor group including two slots located inside different core slots, a plug-in terminal located outside the core slot, and two welding terminals located outside the core slot and extending in opposite directions. The two slots of each conductor in the third conductor group are located within the N+1th radially adjacent layers of the stator core. Within layers N and N+2; the fourth conductor group includes: two fourth large conductors and one fourth small conductor, or the fourth conductor group includes: one fourth large conductor and two fourth small conductors; each conductor of the fourth conductor group includes two slot interiors located inside different iron core slots, a plug-in end located outside the iron core slot, and two welded ends located outside the iron core slot with the same extending direction, and the two slot interiors of each conductor of the fourth conductor group are located within the innermost radial layer of the stator iron core; the extending direction of each welded end of each conductor of the fourth conductor group is opposite to the extending direction of each welded end of each conductor of the first conductor group. The above technical solution of this application uses fewer types of conductors, has a simpler arrangement, and can eliminate busbars and busbars, making the twisting direction and twisting slot pitch of the welded ends extending inside the slots in the same radial layer of the stator iron core slots consistent, realizing that the lead ends and neutral points between each phase winding are set in any slot and layer of the same radial direction, reducing the complexity of the manufacturing process, reducing production costs, and improving processing efficiency. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the motor stator structure in Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the stator winding structure in Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the insulating paper structure inside the stator slot of the first type of motor in this embodiment of the invention;

[0031] Figure 4 This is a schematic diagram of the insulating paper structure inside the stator slot of the second type of motor in this embodiment of the invention;

[0032] Figure 5 This is a schematic diagram of the third type of insulating paper structure in the stator slot of the motor in this embodiment of the invention;

[0033] Figure 6 This is a schematic diagram of the fourth type of insulating paper structure in the stator slot of the motor in this embodiment of the invention;

[0034] Figure 7 This is a schematic diagram of the structure of the first conductor group in Embodiment 1 of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the fourth conductor group in Embodiment 1 of the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the second conductor group in Embodiment 1 of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of the third conductor group in Embodiment 2 of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the third conductor group in Embodiment 1 of the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of the fourth conductor group in Embodiment 7 of the present invention;

[0040] Figure 13 This is a schematic diagram of the structure of the third conductor group in Embodiment 8 of the present invention;

[0041] Figure 14 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment 1 of the present invention;

[0042] Figure 15 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment 2 of the present invention;

[0043] Figure 16 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment 3 of the present invention;

[0044] Figure 17 This is a schematic diagram showing the unfolded planar development of the welding end of the phase winding in Embodiments 1 to 3 of the present invention;

[0045] Figure 18 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment 4 of the present invention;

[0046] Figure 19 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment 5 of the present invention;

[0047] Figure 20 This is a schematic diagram of the unfolded planar development of the plug-in end of the phase winding in Embodiment Six of the present invention;

[0048] Figure 21 These are schematic diagrams showing the unfolded planar development of the welding ends of the phase windings in Embodiments 4 to 6 of the present invention; Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish different objects, not to limit a specific order. The various embodiments of this invention described below can be performed individually or in combination with each other; the embodiments of this invention do not impose specific limitations in this regard.

[0051] In this application, the pitch is the circumferential interval between the two slots 301 of the same conductor, or the pitch is the sum of the span between the slots 301 corresponding to one weld end of one conductor and the span between the slots 301 corresponding to one weld end of another conductor. It should be noted that in this application, the first radial inner layer of the stator core can be either the first inner layer in the axial direction away from the center of the stator core or the first inner layer in the axial direction close to the center of the stator core.

[0052] like Figure 1 As shown, an embodiment of the present invention provides a motor stator, including: a stator core 20, wherein the stator core 20 has a plurality of core slots 21 formed on the radial inner surface of the stator core and spaced apart by a predetermined slot pitch along the circumferential direction of the stator core;

[0053] like Figures 1 to 2, Figures 14 to 21 As shown, the stator winding 10 includes multiple phase windings mounted on the stator core 20 so that they are different from each other in electrical phase, and forms an even number of layers in the radial direction of the stator core 20. In this embodiment, the phase windings (U-phase winding, V-phase winding, or W-phase winding) form 4 layers in the radial direction of the stator core; it should be noted that the above-mentioned even number of layers can be four, six, eight, or more. The motor stator of this embodiment is the motor stator of a hairpin motor.

[0054] Combination Figures 1 to 21 In this embodiment, the stator winding 10 is mounted on the stator core 20, that is, multiple phase windings mounted on the stator core 20 are different from each other in electrical phase. The stator winding 10 is a three-phase winding (i.e., U-phase winding, V-phase winding, W-phase winding), and the number of slots per pole per phase is equal to 3. Each magnetic pole of the rotor is provided with three slots 21. In this embodiment, the number of slots per pole per phase is 3. The rotor has six magnetic poles and this is true for each phase of the three-phase stator winding 10. The number of slots 21 provided in the stator core 20 is equal to 54 (i.e., 3X6X3). In this embodiment, each phase winding (U-phase winding, V-phase winding, W-phase winding) includes one first conductor group, eight second conductor groups, two third conductor groups, and one fourth conductor group connected in series.

[0055] Furthermore, in this embodiment, the stator core 20 is defined by two adjacent slots 21, forming a tooth 22. The stator core 20 is formed by stacking multiple annular magnetic steel plates to create two end faces 25 and 26 in the axial direction of the stator core. Other conventional metal plates can also be used instead of magnetic steel plates.

[0056] like Figure 7 , Figures 14 to 21As shown, in Embodiments 1 to 8, the first conductor group includes: three identical first conductors 150, each first conductor 150 including two slot interiors 301 located inside different core slots in the same radial direction of the stator core, a wire insertion end 302 located outside the core slot 21, the wire insertion end 302 being connected to the two slot interiors 301 at the axial outer end 25 of the core slot 21, and two welding ends 303 (both pointing to the left) located outside the core slot and extending in the same direction, the two welding ends 303 being connected in the same layer at the axial outer end 26 of the core slot 21. The two slots 301 of the conductor are located in the first layer of the outermost radial layer of the stator core; the two slots of the first conductor 150 of the first conductor group are located in core slots 28 and 37, the two slots of the second conductor 150 of the first conductor group are located in core slots 29 and 38, and the two slots of the third conductor 150 of the first conductor group are located in core slots 30 and 39. Thus, it can be seen that the two slots of the three conductors 150 of the first conductor group are respectively located in three adjacent core slots in the circumferential direction of the stator core.

[0057] like Figure 9 , Figure 14 , Figure 15 , Figure 16 , Figure 17 As shown, in Embodiments 1 to 3, the second conductor group includes: three identical second conductors 350, each second conductor 350 including two slot interiors 301 located inside different iron core slots, a plug-in end 302 located outside the iron core slot 21, the plug-in end 302 located at the axial outer 25 end of the iron core slot 21 connecting the two slot interiors 301 of the conductor, two welding ends 303 located outside the iron core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 located at the axial outer 26 end of the iron core slot 21 respectively connecting the two slot interiors 301 of the conductor in the same layer, the two slot interiors of the second conductor of one second conductor group are located in the first and second layers of the stator iron core radially adjacent, and the two slot interiors of the second conductor of another second conductor group are located in the third and fourth layers of the stator iron core radially adjacent. The two slots of the first second conductor 350 in the second conductor group are located in core slots 2 and 10, the two slots of the second second conductor 350 in the second conductor group are located in core slots 3 and 11, and the two slots of the third second conductor 350 in the second conductor group are located in core slots 4 and 12. It can be seen that the pitch between the two slots of the three second conductors 350 in the second conductor group is a short pitch (the short pitch is 8 in this embodiment). The two slots of the three second conductors 350 in the second conductor group are located in three adjacent core slots in the circumferential direction of the stator core.

[0058] like Figure 9 , Figure 18 , Figure 19 , Figure 20 , Figure 21 As shown, in embodiments four to eleven, the second conductor group includes: three identical second conductors 350, each second conductor 350 including two slot interiors 301 located inside different iron core slots, a plug-in end 302 located outside the iron core slot 21, the plug-in end 302 located at the axial outer 25 end of the iron core slot 21 connecting the two slot interiors 301 of the conductor, two welding ends 303 located outside the iron core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 located at the axial outer 26 end of the iron core slot 21 respectively connecting the two slot interiors 301 of the conductor in the same layer, the two slot interiors of one second conductor 350 of different second conductor groups are located in the first and second layers of the stator iron core radially adjacent, and the two slot interiors of the second conductor 350 of another second conductor group are located in the third and fourth layers of the stator iron core radially adjacent. The two slots of the first second conductor 300 in the second conductor group are located in core slots 1 and 11. The two slots of the second second conductor 350 in the second conductor group are located in core slots 2 and 12. The two slots of the third second conductor 350 in the second conductor group are located in core slots 3 and 13. It can be seen that the pitch between the two slots of the three second conductors 350 in the second conductor group is a long pitch (10 in this embodiment). The two slots of the three second conductors 350 in the second conductor group are located in three adjacent core slots in the circumferential direction of the stator core.

[0059] like Figures 1 to 21 As shown, in Embodiments 1 to 11, the third conductor group includes: three conductors 250 (200-1A, 200-1B, 200-2A, 200-2B), each conductor 250 (200-1A, 200-1B, 200-2A, 200-2B) includes two slot interiors 301 located inside different iron core slots, a wire insertion end 302 located outside the iron core slot 21, the wire insertion end 302 located at the axial outer 25 end of the iron core slot 21 connecting the two slot interiors 301 of the conductor, two welding ends 303 located outside the iron core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 located at the axial outer 26 end of the iron core slot 21 respectively connecting the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor in the third conductor group are located in the second and third layers of the stator iron core radially adjacent.

[0060] like Figure 8 , Figures 14 to 21As shown, in Embodiments 1 to 6, the fourth conductor group includes: two fourth large conductors 100-1A and one fourth small conductor 100-1B. Each conductor in the fourth large conductor 100-1A and the fourth small conductor 100-1B of the fourth conductor group includes two slot interiors 301 located inside different iron core slots, a wire insertion end 302 located outside the iron core slot 21, the wire insertion end 302 located at the axial outer 25 end of the iron core slot 21 connecting the two slot interiors 301 of the conductor, and two welding ends 303 located outside the iron core slot and extending in the same direction (both to the right), the two welding ends 303 located at the axial outer 26 end of the iron core slot 21 respectively connecting the two slot interiors 301 of the conductor in the same layer. Each conductor in the fourth conductor group has two... The slots inside the first slot of the fourth conductor group are located in the innermost first layer of the stator core (the fourth layer of the outermost radial layer); the two slots inside the first fourth large conductor 100-1A of the fourth conductor group are located in core slots 20 and 30, the two slots inside the second fourth large conductor 100-1A of the fourth conductor group are located in core slots 21 and 31, and the two slots inside the fourth small conductor 100-1B of the fourth conductor group are located in core slots 22 and 29. It can be seen that the two slots inside the first fourth large conductor 100-1A and the two slots inside the second fourth large conductor 100-1A of the fourth conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core, and the slots inside the two fourth large conductors 100A surround the two slots inside the fourth small conductor 100B. The technical solution for the motor stator in the application embodiment eliminates the series busbars between the phase windings in related technologies. The first, second, third, and fourth conductor groups of each phase can be directly connected, allowing the terminals and neutral point of each phase winding to be located in any two radially adjacent layers of any core slot. This reduces the complexity of the manufacturing process, lowers production costs, reduces material costs, and improves processing efficiency. Therefore, the technical solution of this application embodiment effectively solves the problems of complex manufacturing processes, high production costs, and low processing efficiency of hairpin windings in related technologies.

[0061] like Figure 12In Embodiment Seven, the fourth conductor group includes: one fourth large conductor 100-2A and two fourth small conductors 100-2B. Each conductor in the fourth large conductor 100-2A and the fourth small conductor 100-2B of the fourth conductor group includes two slot interiors 301 located inside different iron core slots, a wire insertion end 302 located outside the iron core slot 21, the wire insertion end 302 located at the axial outer end 25 of the iron core slot 21 connecting to the two slot interiors 301 of the conductor, and two welding ends 303 located outside the iron core slot and extending in the same direction (both to the right), the two welding ends 303 located at the axial outer end 26 of the iron core slot 21 respectively connecting to the two slot interiors 301 of the conductor in the same layer. The two slot interiors of each conductor in the fourth conductor group are located inside the iron core slot 2A and two small conductors 100-2B. The first layer within the innermost radial layer of the stator core (the fourth layer located in the outermost radial layer); the two slots of the fourth large conductor 100-2A of the fourth conductor group are located in core slots 20 and 31, the two slots of the first fourth small conductor 100-2B of the fourth conductor group are located in core slots 21 and 29, and the two slots of the fourth small conductor 100-2B of the fourth conductor group are located in core slots 22 and 30. It can be seen that the two slots of the first fourth small conductor 100-2B and the two slots of the second fourth small conductor 100-2B of the fourth conductor group are located in two core slots adjacent to each other in the circumferential direction of the stator core, and the two slots of the fourth large conductor 100-2A surround the slots of the two fourth small conductors 100-2B. The technical solution for the motor stator in the application embodiment eliminates the busbars connected in series between the phase windings in related technologies. The first, second, third, and fourth conductor groups of each phase can be directly connected, allowing the terminals and neutral point of each phase winding to be located in any core slot and any two radially adjacent layers. This reduces the complexity of the manufacturing process, lowers production costs, reduces material costs, and improves processing efficiency. Therefore, the technical solution of this application embodiment effectively solves the problems of complex manufacturing processes, high production costs, and low processing efficiency of hairpin windings in related technologies.

[0062] like Figure 7 , Figure 8 , Figure 9 , Figure 10As shown, in Embodiments 1 to 6, the two slots of the first conductor in the first conductor group are located in core slots 28 and 37, respectively. Therefore, the pitch between the two slots of the first conductor is a whole pitch of 9 (in this embodiment, the whole pitch is 9). The two slots of the first fourth large conductor in the fourth conductor group are located in core slots 20 and 30, respectively. The two slots of the second fourth large conductor in the fourth conductor group are located in core slots 21 and 31, respectively. Therefore, the pitch between the two slots of the two fourth large conductors 100-1A in the fourth conductor group is a long pitch of 10. The two slots of one fourth small conductor in the fourth conductor group are located in core slots 22 and 29, respectively. Therefore, the pitch between the two slots of one fourth small conductor 100B in the fourth conductor group is a short pitch of 7. Figure 7 , Figure 9 , Figure 11 , Figure 12 As shown, in Embodiment 7, the two slots of the first conductor of the first conductor group are located in core slots 28 and 37, respectively. Thus, the pitch between the two slots of the first conductor is a whole pitch 9 (in this embodiment, the whole pitch is 9). The two slots of the fourth large conductor of the fourth conductor group are located in core slots 20 and 31, respectively. Thus, the pitch between the two slots of the fourth large conductor 100A of the fourth conductor group is a long pitch 11. The two slots of the first fourth small conductor of the fourth conductor group are located in core slots 21 and 29, respectively. The two slots of the second fourth small conductor of the fourth conductor group are located in core slots 22 and 30, respectively. Thus, the pitch between the two slots of the two fourth small conductors 100B of the fourth conductor group is a short pitch 8. That is, the pitch between the two slots of the first conductor of the first conductor group is a whole pitch 9, the pitch between the two slots of the fourth large conductor of the fourth conductor group is a long pitch 10 (11), and the pitch between the two slots of the fourth small conductor of the fourth conductor group is a short pitch 7 (8).

[0063] Combination Figure 14 , Figure 17In Embodiment 1, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. Each phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end, and the welding end located in the second radial layer of the stator core is the second connection welding end. The welding ends are connected as follows: the welding end located in the third radial layer of the stator core is the first welding end, and the welding end located in the fourth radial layer of the stator core is the second welding end. The sum of the spans of the first welding ends and the second welding ends adjacent in the same radial direction of the stator core is the long pitch 10. Specifically, the first welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth radial layer of the stator core is connected to the second welding end of a welding end of a second conductor 350 or a third conductor 250 located in the third radial layer of the stator core. The pitch of the connecting weld ends is a long pitch of 10. The pitch of the first connecting weld end of one weld end of a second conductor 350 or a third conductor 250 located in the second layer of the same radial direction of the stator core, and the pitch of the second connecting weld end of one weld end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the adjacent first layer of the same radial direction of the stator core, is a long pitch of 10. The two slots of the second conductor in the second conductor group are located in core slots 2 and 10 respectively, that is, the pitch between the two slots of the second conductor is a short pitch. 8. The three conductors of the third conductor group are the same third conductor 250. The two slots of the first third conductor 250 of the third conductor group are located in the iron core slots 20 and 28. The two slots of the second third conductor 250 of the third conductor group are located in the iron core slots 21 and 29. The two slots of the third third conductor 250 of the third conductor group are located in the iron core slots 22 and 30. That is, the pitch between the two slots of the third conductor 250 is the short pitch 8. It can be seen that the two slots of the three third conductors 250 of the third conductor group are located in the three iron core slots that are adjacent in the circumferential direction of the stator iron core.

[0064] Combination Figure 15 , Figure 17In Embodiment 2, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. Each phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core... For the second connection welding end, the sum of the span of the first connection welding end and the span of the second connection welding end located in the same radial direction of the stator core is the long pitch 10; specifically, the pitch connecting the first connection welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connection welding end of a welding end of a second conductor 350, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the third layer of the same radial direction of the stator core is the long pitch 10, and the other connection welding end of a second conductor 350, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the second layer of the same radial direction of the stator core is the long pitch 10. The pitch connecting the first connecting weld end of one welded end to the second connecting weld end of one welded end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial direction adjacent to the first layer of the stator core is a long pitch of 10; the two slots of the second conductor in the second conductor group are located in core slots 2 and 10 respectively, that is, the pitch between the two slots of the second conductor is a short pitch of 8; the three conductors of the third conductor group are two fifth large conductors 200-1A and one fifth small conductor 200-1B; the two slots of the first fifth large conductor 200-1A in the third conductor group are located in core slots 20 and 29 respectively; the second fifth large conductor 200-1A in the third conductor group... The two slots of 1A are located in core slots 21 and 30 respectively. The two slots of the fifth small conductor 200-1B of the third conductor group are located in core slots 22 and 28 respectively. That is, the pitch between the two slots of the two fifth large conductors 200-1A of the third conductor group is a whole pitch of 9, and the pitch between the two slots of the fifth small conductor 200-1B of the third conductor group is a short pitch of 6. It can be seen that the two slots of the first fifth large conductor 200-1A and the two slots of the second fifth large conductor 200-1A of the third conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core, and the slots of the two fifth large conductors 200-1A surround the two slots of the fifth small conductor 200-1B.

[0065] Combination Figure 13In Embodiment 8, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. Each phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core is the first connection welding end. The end is the second connecting weld end. The sum of the span of the first connecting weld ends and the span of the second connecting weld ends located in the same radial direction of the stator core is the long pitch 10. Specifically, the pitch connecting the first connecting weld end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connecting weld end of a second conductor 350, a fifth large conductor 200-2A, or a fifth small conductor 200-2B located in the third layer of the same radial direction of the stator core is the long pitch 10. The pitch connecting the second connecting weld end of a second conductor 350, a fifth large conductor 200-2A, or a fifth small conductor 200-2B located in the second layer of the same radial direction of the stator core is the long pitch 10. The pitch of the first connecting weld end of the other weld end connected to the second connecting weld end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial adjacent first layer of the stator core is a long pitch of 10; the two slots of the second conductor of the second conductor group are located in core slots 2 and 10 respectively, that is, the pitch between the two slots of the second conductor is a short pitch of 8; the three conductors of the third conductor group are a fifth large conductor 200-2A and two fifth small conductors 200-2B; the two slots of the fifth large conductor 200-2A of the third conductor group are located in core slots 20 and 30 respectively; the first fifth small conductor 200 of the third conductor group... The two slots of -2A are located in core slots 21 and 28 respectively. The two slots of the second fifth small conductor 200-2B of the third conductor group are located in core slots 22 and 29 respectively. That is, the pitch between the two slots of the fifth large conductor 200-2A of the third conductor group is the long pitch 10, and the pitch between the two slots of the two fifth small conductors 200-2B of the third conductor group is the short pitch 7. It can be seen that the two slots of the first fifth small conductor 200-2B and the two slots of the second fifth small conductor 200-2B of the third conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core. The slots of the fifth large conductor 200-2A surround the two fifth small conductors 200-2B.

[0066] Combination Figure 16 , Figure 17In Embodiment 3, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two different third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. Each phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core is the second connection welding end. At the welding end, the sum of the span of the first connecting welding end and the span of the second connecting welding end, which are adjacent in the same radial direction of the stator core, is the long pitch 10. Specifically, the pitch connecting the first connecting welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connecting welding end of a welding end of a second conductor 350, a third conductor 250, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the third layer of the same radial direction of the stator core is the long pitch 10. The pitch connecting the second connecting welding end of a welding end of a second conductor 350, a third conductor 250, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the second layer of the same radial direction of the stator core is the long pitch 10. The pitch connecting the first connecting weld end of the other weld end of body 200-1B to the second connecting weld end of a weld end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial direction adjacent to the first layer of the stator core is a long pitch of 10; the two slots of the second conductor of the second conductor group are located in core slots 2 and 10 respectively, that is, the pitch between the two slots of the second conductor is a short pitch of 8; the three conductors of the first third conductor group are two fifth large conductors 200A and one fifth small conductor 200-1B; the two slots of the first fifth large conductor 200-1A of the third conductor group are located in core slots 20 and 29 respectively; the second fifth large conductor of the third conductor group... The two slots of body 200-1A are located in core slots 21 and 30 respectively. The two slots of the fifth small conductor 200-1B of the third conductor group are located in core slots 22 and 28 respectively. That is, the pitch between the two slots of the two fifth large conductors 200-1A of the third conductor group is a whole pitch of 9. The pitch between the two slots of the fifth small conductor 200-1B of the third conductor group is a short pitch of 6. The two slots of the first fifth large conductor 200-1A and the two slots of the second fifth large conductor 200-1A of the third conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core. The slots of the two fifth large conductors 200-1A surround the two slots of the fifth small conductor 200-1B of the third conductor group.The three conductors in the second and third conductor groups are the same third conductor 250. The two slots of the first third conductor 250 in the third conductor group are located in core slots 29 and 37; the two slots of the second third conductor 250 in the third conductor group are located in core slots 30 and 38; and the two slots of the third third conductor 250 in the third conductor group are located in core slots 31 and 39. That is, the pitch between the two slots of the third conductor 250 is the short pitch 8. Therefore, the two slots of the three third conductors 250 in the third conductor group are respectively located in three adjacent core slots circumferentially aligned with the stator core.

[0067] Combination Figure 13 In Embodiment Nine, the three conductors of the third conductor group are one fifth large conductor 200-2A and two fifth small conductors 200-2B. The two slots of the fifth large conductor 200-2A of the third conductor group are located in core slots 20 and 30. The two slots of the first fifth small conductor 200-2B of the third conductor group are located in core slots 21 and 28. The two slots of the second fifth small conductor 200-2B of the third conductor group are located in core slots 22 and 29. The pitch between the two slots of the fifth large conductor 200-2A of the third conductor group is a long pitch of 10, and the pitch between the two slots of the two fifth small conductors 200-2B of the third conductor group is a short pitch of 7. The difference between Embodiment Nine and Embodiment Three is only that the three conductors of the third conductor group are one fifth large conductor 200-2A and two fifth small conductors 200-2B. The rest of the structure is the same as that of Embodiment Three, and will not be described further here.

[0068] Combination Figure 18 , Figure 21As shown, in Embodiment 4, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. Each phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connecting weld ends connected together. The weld end located in the first radial layer of the stator core is the first connecting weld end, and the weld end located in the second radial layer of the stator core is the second connecting weld end. The two connection welding ends are as follows: the welding end located in the third radial layer of the stator core is the first connection welding end, and the welding end located in the fourth radial layer of the stator core is the second connection welding end. The sum of the spans of the first connection welding ends and the second connection welding ends adjacent in the same radial direction of the stator core is the short pitch 8. Specifically, the first connection welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth radial layer of the stator core is connected to the second connection welding end of a welding end of a second conductor 350 or a third conductor 250 located in the third radial layer of the stator core. The pitch of the welded ends is a short pitch of 8. The pitch of the first connecting welded end of one welded end of a second conductor 350 or a third conductor 250 located in the second layer of the same radial direction of the stator core, connected to the second connecting welded end of one welded end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the adjacent first layer of the same radial direction of the stator core, is a short pitch of 8. The two slots of the second conductor 350 in the second conductor group are located in core slots 1 and 11 respectively, meaning the pitch between the two slots of the second conductor is a long pitch of 1. 0. The three conductors of the third conductor group are the same third conductor 450. The two slots of the first third conductor 450 of the third conductor group are located in the iron core slots 19 and 29. The two slots of the second third conductor 450 of the third conductor group are located in the iron core slots 20 and 30. The two slots of the third third conductor 450 of the third conductor group are located in the iron core slots 21 and 31. That is, the pitch between the two slots of the third conductor 250 is the long pitch 10. It can be seen that the two slots of the three third conductors 250 of the third conductor group are located in the three iron core slots that are adjacent in the circumferential direction of the stator iron core.

[0069] Combination Figure 19 , Figure 21As shown, in Embodiment 5, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core... The welding end is the second connecting welding end. The sum of the span of the first connecting welding end and the span of the second connecting welding end, which are adjacent in the same radial direction of the stator core, is the short pitch 8. Specifically, the pitch connecting the first connecting welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connecting welding end of a welding end of a second conductor 350, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the third layer of the same radial direction of the stator core is the short pitch 8. The pitch connecting the second connecting welding end of a welding end of a second conductor 350, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the second layer of the same radial direction of the stator core is the short pitch 8. The pitch connecting the first connecting weld end of each welded end to the second connecting weld end of a welded end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial direction adjacent to the first layer of the stator core is a short pitch of 8; the two slots of the second conductor 350 in the second conductor group are located in core slots 1 and 11 respectively, that is, the pitch between the two slots of the second conductor is a long pitch of 10; the third conductor group includes two fifth large conductors 200-1A and one fifth small conductor 200-1B; the two slots of the first fifth large conductor 200-1A in the third conductor group are located in core slots 19 and 30 respectively; the two slots of the second fifth large conductor 200-1A in the third conductor group are located in core slots 19 and 30 respectively; the two slots of the second fifth large conductor 200-1A in the third conductor group are located in core slots 19 and 30 respectively. The slots inside are located in core slots 20 and 31 respectively. The two slots inside the fifth small conductor 200-1B of the third conductor group are located in core slots 21 and 29 respectively. That is, the pitch between the two slots inside the two fifth large conductors 200-1A of the third conductor group is the long pitch 11, and the pitch between the two slots inside the fifth small conductor 200-1B of the third conductor group is the short pitch 8. It can be seen that the two slots inside the first fifth large conductor 200-1A and the two slots inside the second fifth large conductor 200-1A of the third conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core, and the slots inside the two fifth large conductors 200-1A surround the two slots inside the fifth small conductor 200-1B.

[0070] Combination Figure 13In Embodiment 10, the phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two identical third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core is... The second connecting weld end, the sum of the span of the first connecting weld end and the span of the second connecting weld end adjacent to each other in the same radial direction of the stator core, is a short pitch 8; specifically, the pitch connecting the first connecting weld end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connecting weld end of a second conductor 350, a fifth large conductor 200-2A, or a fifth small conductor 200-2B located in the third layer of the same radial direction of the stator core is a short pitch 8, and the pitch connecting the other connecting weld end of a second conductor 350, a fifth large conductor 200-2A, or a fifth small conductor 200-2B located in the second layer of the same radial direction of the stator core is a short pitch 8. The pitch connecting the first connecting weld end of the terminal to the second connecting weld end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial direction adjacent to the first layer of the stator core is a short pitch of 8; the two slots of the second conductor 350 in the second conductor group are located in core slots 1 and 11 respectively, that is, the pitch between the two slots of the second conductor 350 is a long pitch of 10; the third conductor group has a fifth large conductor 200-2A and two fifth small conductors 200-2B; the two slots of the fifth large conductor 200-2A in the third conductor group are located in core slots 19 and 31 respectively; the two slots of the first fifth small conductor 200-2B in the third conductor group... The slots inside the second fifth small conductor 200-1B of the third conductor group are located in slots 20 and 29 of the iron core, respectively. The slots inside the second fifth small conductor 200-1B of the third conductor group are located in slots 21 and 30 of the iron core, respectively. That is, the pitch between the two slots inside the fifth large conductor 200-1A of the third conductor group is a long pitch of 12. The pitch between the two slots inside the second fifth small conductor 200-1B of the third conductor group is a whole pitch of 9. The two slots inside the first fifth small conductor 200-1B and the two slots inside the second fifth small conductor 200-1B of the third conductor group are located in two iron core slots that are circumferentially adjacent to each other in the stator iron core. The two slots inside the fifth large conductor 200-1A of the third conductor group surround the two fifth small conductors 200-1A of the third conductor group.

[0071] Combination Figure 20、 Figure 21In Embodiment Six, the phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q equals 1, meaning it contains two different third conductor groups. When there are 6 even-numbered layers, the U-phase winding includes 4 third conductor groups; when there are 8 even-numbered layers, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has multiple first and second connection welding ends connected together. The welding end located in the first radial layer of the stator core is the first connection welding end; the welding end located in the second radial layer of the stator core is the second connection welding end; the welding end located in the third radial layer of the stator core is the first connection welding end; and the welding end located in the fourth radial layer of the stator core is the first connection welding end. For the second connection welding end, the sum of the span of the first connection welding end and the span of the second connection welding end located in the same radial direction of the stator core is the short pitch 8; specifically, the pitch connecting the first connection welding end of a welding end of a first conductor 150 or a second conductor 350 located in the fourth layer of the same radial direction of the stator core to the second connection welding end of a welding end of a second conductor 350, a third conductor 250, a fifth large conductor 200-1A, or a fifth small conductor 200-1B located in the third layer of the same radial direction of the stator core is the short pitch 8, and the pitch connecting the second conductor 350, a third conductor 250, or a fifth large conductor 200-1A located in the second layer of the same radial direction of the stator core is the short pitch 8. The pitch connecting the first connecting weld end of another welded end of a fifth small conductor 200-1B to the second connecting weld end of a welded end of a second conductor 350, a fourth large conductor 100-1A, or a fourth small conductor 100-1B located in the same radial adjacent first layer of the stator core is a short pitch of 8; the two slots of the second conductor 350 in the second conductor group are located in core slots 1 and 11 respectively, that is, the pitch between the two slots of the second conductor 350 is a long pitch of 10; the two fifth large conductors 200-1A and one fifth small conductor 200-1B in the first third conductor group, and the two slots of the first fifth large conductor 200-1A in the third conductor group are located in core slots 19 respectively. 30. The two slots of the second fifth large conductor 200-1A of the third conductor group are located in core slots 20 and 31 respectively. The two slots of the fifth small conductor 200-1B of the third conductor group are located in core slots 21 and 29 respectively. That is, the pitch between the two slots of the fifth large conductor 200-1A is the long pitch 11, and the pitch between the two slots of the fifth small conductor 200-1B is the short pitch 8. The two slots of the first fifth large conductor 200-1A and the two slots of the second fifth large conductor 200-1A of the third conductor group are located in two core slots that are circumferentially adjacent to each other in the stator core. The slots of the two fifth large conductors 200-1A surround the fifth small conductor 200-1B of the third conductor group.The three conductors in the second third conductor group are the same third conductor 250. The two slots of the third conductor 250 in the third conductor group are located in core slots 28 and 38, respectively. That is, the pitch between the two slots of the third conductor 450 is the long pitch 10. The two slots of the first third conductor 250 in the third conductor group are located in core slots 28 and 38; the two slots of the second third conductor 250 in the third conductor group are located in core slots 29 and 39; and the two slots of the third third conductor 250 in the third conductor group are located in core slots 30 and 40. Therefore, the two slots of the three third conductors 250 in the third conductor group are respectively located in three adjacent core slots circumferentially aligned with the stator core.

[0072] Combination Figure 13 In Example 11, the three conductors of the third conductor group are one fifth large conductor 200-2A and two fifth small conductors 200-2B. The two slots of the fifth large conductor 200-2A of the third conductor group are located in core slots 19 and 31. The two slots of the first fifth small conductor 200-2B of the third conductor group are located in core slots 20 and 29. The two slots of the second fifth small conductor 200-2B of the third conductor group are located in core slots 21 and 30. The pitch between the two slots of the fifth large conductor 200-2A of the third conductor group is a long pitch of 12. The pitch between the two slots of the two fifth small conductors 200-2B of the third conductor group is a whole pitch of 9. The only difference between Example 11 and Example 6 is that the three conductors of the third conductor group are one fifth large conductor 200-2A and two fifth small conductors 200-2B. The rest of the structure is the same as that of Example 3, and will not be described further here.

[0073] This embodiment also provides a motor, including the motor stator described above, and a motor using the motor stator described above.

[0074] The motor provided in this embodiment of the invention includes the motor stator in the above embodiments. Therefore, the motor provided in this embodiment of the invention also has the beneficial effects described in the above embodiments, which will not be repeated here.

[0075] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium (bus connection); and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meanings of the above within the context of the present invention. Finally, it should be noted that the above are merely preferred embodiments of the present invention and the technical principles employed.

[0076] Those skilled in the art will understand that the present invention is not limited to the embodiments described herein, and various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A motor stator, comprising: A stator core having a plurality of core slots formed on the radial inner surface of the stator core and spaced apart by a predetermined slot pitch along the circumferential direction of the stator core. The stator winding includes multiple phase windings mounted on the stator core, and forms an even number of layers in the radial direction of the stator core; Its characteristic is that each phase winding is composed of multiple conductor groups connected in series along the circumference of the stator core; The multiple conductor groups of this phase winding include: a first conductor group, multiple second conductor groups, multiple third conductor groups, and a fourth conductor group; The first conductor group includes three identical first conductors, each of which includes two slot interiors located inside different core slots, a wire insertion end located outside the core slot, and two welding ends located outside the core slot and extending in the same direction. The two slot interiors of each first conductor in the first conductor group are located within the outermost radial layer of the stator core. The second conductor group comprises: three identical second conductors, each second conductor including two slot interiors located inside different core slots, a plug-in terminal located outside the core slot, and two welded terminals located outside the core slot and extending in opposite directions. The two slot interiors of each second conductor in each second conductor group are respectively located within radially adjacent N layers and N+1 layers of the stator core, where N is an odd number. The pitch between the two slot interiors of the second conductors in the second conductor group is a long pitch, or the pitch between the two slot interiors of the second conductors in the second conductor group is a short pitch. The third conductor group includes three conductors. Each conductor of the third conductor group includes two slot interiors located inside different core slots, a plug end located outside the core slot, and two welding ends located outside the core slot and extending in opposite directions. The two slot interiors of each conductor of the third conductor group are respectively located in the radially adjacent N+1 and N+2 layers of the stator core. The fourth conductor group includes: two fourth large conductors and one fourth small conductor, or the fourth conductor group includes: one fourth large conductor and two fourth small conductors; each conductor of the fourth conductor group includes two slot interiors located inside different core slots, a plug end located outside the core slot, and two weld ends located outside the core slot and extending in the same direction, and the two slot interiors of each conductor of the fourth conductor group are both located within the innermost radial layer of the stator core; the extension direction of each weld end of each conductor of the fourth conductor group is opposite to the extension direction of each weld end of each conductor of the first conductor group.

2. The motor stator according to claim 1, characterized in that, The pitch between the two slots of the first conductor in the first conductor group is a whole pitch, the pitch between the two slots of the fourth large conductor in the fourth conductor group is a long pitch, and the pitch between the two slots of the fourth small conductor in the fourth conductor group is a short pitch.

3. The motor stator according to claim 2, characterized in that, The phase winding has multiple first connection welding ends and multiple second connection welding ends connected together. The welding ends located in the M-1 layer of the stator core that are adjacent in the same radial direction are the first connection welding ends, and the welding ends located in the M layer of the stator core that are adjacent in the same radial direction are the second connection welding ends, where M is an even number.

4. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

5. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is the short pitch.

6. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a long pitch; the three conductors of each third conductor group are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a whole pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

7. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor of the second conductor group is a long pitch; the three conductors of one third conductor group of the phase winding are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

8. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor of the second conductor group is a long pitch; the three conductors of one third conductor group of the phase winding are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a whole pitch; the three conductors of the other third conductor group of the phase winding are a third conductor, the pitch between the two slots of the third conductor is a long pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

9. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

10. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

11. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor in the second conductor group is a short pitch; the three conductors of each third conductor group are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, the pitch between the two slots of the fifth small conductor is a short pitch, and the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

12. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor of the second conductor group is a short pitch; the three conductors of one third conductor group of the phase winding are two fifth large conductors and one fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

13. The motor stator according to claim 3, characterized in that, When the pitch between the two slots of the second conductor of the second conductor group is a short pitch; the three conductors of one third conductor group of the phase winding are a fifth large conductor and two fifth small conductors, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a whole pitch; the three conductors of the other third conductor group of the phase winding are third conductors, the pitch between the two slots of the third conductor is a short pitch, and the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

14. An electric motor, characterized in that, Includes the motor stator as described in any one of claims 1 to 13.

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