Motor stator and motor

Abstract

The present invention provides a motor stator and a motor, comprising: a stator core, the stator core having a plurality of core slots, the plurality of core slots being formed on the radial inner surface of the stator core and spaced apart at a predetermined slot pitch along the circumferential direction of the stator core; a stator winding, comprising a plurality of phase windings mounted on the stator core and forming an even number of layers in the radial direction of the stator core; the stator winding being characterized in that each phase winding comprises a first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, and a fourth conductor group connected in series; a small number of conductor types are used, the arrangement is simple, bus bars and busbars can be eliminated, and the twisting direction and twisting slot pitch of the welded ends extending from the slots of the same radial layer in the stator core slots are consistent, so that the lead ends and neutral points between the phase windings are arranged in any slot and any layer in the same radial direction, thereby reducing the complexity of the manufacturing process, reducing production costs, and improving processing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a motor stator and a motor. Background Art

[0002] The stator winding includes multiple hairpin coils, which are inserted into the slots of the stator core according to a certain arrangement to form the single-phase winding or multi-phase winding of the required motor. The hairpin coils used in the prior art are of various types and have complex arrangements, requiring a large number of bus bars and busbars to connect the branches and neutral points of each phase winding. More than 90% of the stator windings in the prior art have more than or equal to 2 slots per pole per phase. However, if the phases of the stator winding are connected in series in a structure, the twisting direction of the weld ends or the twisted slot spacing in the same layer of slots will be inconsistent, resulting in a complex manufacturing process, difficult forming, high production costs, and low processing efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to provide a motor stator and a motor, which use a small number of conductor types and a simple arrangement. Busbars and busbars can be eliminated, so that the twisting direction and twisting slot pitch of the welded ends extending inside the slots of the same radial layer in the stator core slots are consistent, and the lead ends and neutral points between the phase windings are arranged in any slot and any layer of the same radial direction, thereby reducing the complexity of the manufacturing process, reducing production costs, and improving processing efficiency.

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

[0005] a stator core having a plurality of core slots formed on a radially inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core;

[0006] The stator winding comprises a plurality of phase windings mounted on the stator core and forming an even number of layers in the radial direction of the stator core;

[0007] Each phase winding consists of multiple conductor groups connected in series along the circumference of the stator core;

[0008] The plurality of conductor groups include: a first conductor group, a plurality of second conductor groups, a plurality of 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 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, and the two slot interiors of each first conductor of the first conductor group are located in the radially outermost layer of the stator core;

[0010] The second conductor group includes: two second large conductors and one second small conductor, or the second conductor group includes: one second large conductor and two second small conductors; or the second conductor group includes: three identical sixth conductors;

[0011] Each conductor of the second conductor group 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 opposite directions. The two slot interiors of each conductor of the 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.

[0012] The third conductor group includes: three conductors, each conductor of the third conductor group 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 opposite directions, and the two slot interiors of each conductor of the third conductor group are respectively located in radially adjacent N+1 and N+2 layers of the stator core;

[0013] 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 wire plug end located outside the core slot, and two welding 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 located in the radially innermost layer of the stator core.

[0014] Furthermore, the pitch between the two slots of the first conductor of the first conductor group is a full pitch, the pitch between the two slots of the fourth large conductor of the fourth conductor group is a long pitch, and the pitch between the two slots of the fourth small conductor of the fourth conductor group is a short pitch.

[0015] Further, the pitch of the two second large conductors of the second conductor group is 10, and the pitch of one second small conductor of the second conductor group is 7; or the pitch of one second large conductor of the second conductor group is 11, and the pitch of the two second small conductors of the second conductor group is 8; or the pitch of the three sixth conductors of the second conductor group is 9.

[0016] Furthermore, the conductor pitch of the second conductor group is the same as the conductor pitch of at least one third conductor group of the phase winding.

[0017] Furthermore, the pitch of the two second large conductors of the second conductor group is 10, and the pitch of the one second small conductor of the second conductor group is 7; the three conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a full pitch, and / or the three conductors of the third conductor group are one fifth large conductor and two fifth small conductors.

[0018] Furthermore, the pitch of a second large conductor of the second conductor group is 11, and the pitch of two second small conductors of the second conductor group is 8; the three conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a full pitch, and / or the three conductors of the third conductor group are two fifth large conductors and one fifth small conductor.

[0019] Furthermore, the pitch between the two slots of the sixth conductor of the second conductor group is 9 inches; the three conductors of the third conductor group are two fifth large conductors and one fifth small conductor, and / or the three conductors of the third conductor group are one fifth large conductor and two fifth small conductors.

[0020] Furthermore, the pitch between the two slots of the two fifth large conductors of the third conductor group is 10, the pitch between the two slots of one fifth small conductor of the third conductor group is 7, the pitch between the two slots of one fifth large conductor of the third conductor group is 11, and the pitch between the two slots of the two fifth small conductors of the third conductor group is 8.

[0021] 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 layers adjacent to each other in the same radial direction of the stator core are the first connection welding ends, and the welding ends located in the M layers adjacent to each other in the same radial direction of the stator core are the second connection welding ends, the sum of the spans of the first connection welding ends and the second connection welding ends is 9, and M is an even number.

[0022] According to another aspect of the present invention, a motor is provided, comprising the above-mentioned motor stator.

[0023] The technical solution of the present invention is applied to a motor stator, a stator core, the stator core having a plurality of core slots, the plurality of core slots being formed on the radial inner surface of the stator core and spaced apart at a predetermined slot pitch along the circumferential direction of the stator core; a stator winding comprising a plurality of phase windings mounted on the stator core and forming an even number of layers in the radial direction of the stator core; each phase winding being connected in series by a plurality of conductor groups along the circumferential direction of the stator core; the plurality of conductor groups comprising: a first conductor group, a plurality of second conductor groups, a plurality of third conductor groups and a fourth conductor group; wherein the first conductor group A conductor group includes: three identical first conductors, each first conductor includes two slot interiors located inside different core slots, a plug-in end located outside the core slot, and two welding ends located outside the core slot and extending in the same direction, and the two slot interiors of each first conductor of the first conductor group are located in the radially outermost layer of the stator core; a second conductor group includes: two second large conductors and one second small conductor, or the second conductor group includes: one second large conductor and two second small conductors; or the second conductor group includes: three identical sixth conductors; the second conductor group Each conductor of the first conductor group includes two slot interiors located in different core slots, a wire plug-in 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 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 third conductor group includes: three conductors. Each conductor of the third conductor group includes two slot interiors located in different core slots, a wire plug-in 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 radially adjacent N+1 layers 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 in different core slots, a wire plug-in 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 conductor of the fourth conductor group are both located in the radially innermost layer of the stator core. The application adopts the above-mentioned technical solution, which uses fewer types of conductors and a simple arrangement. Busbars and busbars can be eliminated, so that the twisting direction and twisting slot pitch of the welding ends extending inside the slots of the same radial layer in the stator core slots are consistent, and the lead ends and neutral points between the phase windings are set in any slot and any layer in the same radial direction, reducing the complexity of the manufacturing process, reducing production costs, and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 1 is a schematic structural diagram of a motor stator in Embodiment 1 of the present invention;

[0026] Figure 2 1 is a schematic structural diagram of a stator winding in a first embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of the fourth conductor group in the first embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of the first conductor group in the first embodiment of the present invention;

[0029] Figure 5 is a structural diagram of the second conductor group in the fourth embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of the third conductor group in the second embodiment of the present invention;

[0031] Figure 7 is a schematic structural diagram of the third conductor group in the first embodiment of the present invention;

[0032] Figure 8 is a schematic structural diagram of the fourth conductor group in the seventh embodiment of the present invention;

[0033] Figure 9 is a schematic structural diagram of the second conductor group in the eighth embodiment of the present invention;

[0034] Figure 10 is a schematic structural diagram of the third conductor group in Embodiment 9 of the present invention;

[0035] Figure 11 is a schematic structural diagram of the second conductor group in the first embodiment of the present invention;

[0036] Figure 12 This is a planar expansion diagram of the plug-in end of the phase winding in the first embodiment of the present invention;

[0037] Figure 13 This is a schematic diagram of the planar expansion of the wire end of the phase winding in the second embodiment of the present invention;

[0038] Figure 14 This is a planar expansion diagram of the plug-in end of the phase winding in the third embodiment of the present invention;

[0039] Figure 15 1 is a planar expansion diagram of the plug-in end of the phase winding in the fourth embodiment of the present invention;

[0040] Figure 16 This is a planar expansion diagram of the plug-in end of the phase winding in the fifth embodiment of the present invention;

[0041] Figure 17This is a planar expansion diagram of the plug-in end of the phase winding in the sixth embodiment of the present invention;

[0042] Figure 18 This is a planar expansion diagram of the plug-in end of the phase winding in the ninth embodiment of the present invention;

[0043] Figure 19 1 is a schematic diagram of a planar expansion of the welding end of the phase winding in Embodiments 1 to 9 of the present invention; DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0045] It should be noted that the terms "first," "second," and so on, in the specification, claims, and drawings of the present invention are used to distinguish different objects, and are not intended to limit a specific order. The following embodiments of the present invention can be implemented independently or in combination with each other, and the present invention does not impose specific limitations on this.

[0046] In the present application, the pitch is the circumferential spacing between two slot interiors 301 of the same conductor, or the pitch is the sum of the span between the slot interiors 301 corresponding to one welding end of one conductor and the span between the slot interiors 301 corresponding to one welding end of another conductor; it should be noted that in the present application, the radially inner first layer of the stator core can be the inner first layer away from the center of the stator core in the axial direction, or the inner first layer close to the center of the stator core in the axial direction.

[0047] like Figure 1 As shown, an embodiment of the present invention provides a motor stator, comprising: a stator core 20, wherein the stator core 20 has a plurality of core slots 21 formed on a radial inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core;

[0048] like Figures 1 to 2 、 Figures 12 to 18 As shown, the stator winding 10 includes multiple phase windings mounted on the stator core 20 so as to differ in electrical phase. The phase windings are arranged in 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) are arranged in four layers in the radial direction of the stator core. It should be noted that the even number of layers can be four, six, eight, or more. The motor stator in this embodiment is a stator in a hairpin motor.

[0049] Combine Figures 1 to 19In this embodiment, the stator winding 10 is installed on the stator core 20, that is, multiple phase windings installed on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase winding (that is, a U-phase winding, a V-phase winding, and a 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, and the number of slots per pole per phase in this embodiment is 3. The rotor has six magnetic poles and this is the case 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 (that is, 3X6X3). In addition, in this embodiment, the stator core 20 is defined by two adjacent slots 21 to form a tooth portion 22. The stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form two end faces 25 and 26 in the axial direction of the stator core. Other traditional metal plates can also be used instead of magnetic steel plates.

[0050] like Figures 12 to 19 As shown, 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;

[0051] like Figure 3 、 Figures 12 to 19 As shown, in Examples 1 to 9, the first conductor group includes: three identical first conductors 150, each first conductor 150 includes two slot interiors 301 located inside different core slots of the same radial layer of the stator core, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axial outer end 25 of the core slot 21 and connected to the two slot interiors 301 of the conductor, two welding ends 303 (both to the left) located outside the core slot and extending in the same direction, and the two welding ends 303 are located at the axial outer end 26 of the core slot 21 and are connected to the same layer. The two slot interiors 301 of the conductor are connected. The two slot interiors of the first conductor are located in the first layer within the radially outermost layer of the stator core. The two slot interiors of the first first conductor 150 of the first conductor group are located in the core slots 28 and 37. The two slot interiors of the second first conductor 150 of the first conductor group are located in the core slots 29 and 38. The two slot interiors of the third first conductor 150 of the first conductor group are located in the core slots 30 and 39. It can be seen that the two slot interiors of the three first conductors 150 of the first conductor group are respectively located in three circumferentially adjacent core slots of the stator core.

[0052] like Figure 11 、 Figure 12 、 Figure 13 、 Figure 14As shown, in Examples 1 to 3, the second conductor group includes: three identical sixth conductors, that is, each conductor of the second conductor group includes two slot interiors 301 located inside different core slots, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axially outer end 25 of the core slot 21 and connected to the two slot interiors 301 of the conductor, two welding ends 303 located outside the core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 are located at the axially outer end 26 of the core slot 21 and are respectively connected to the two slot interiors 301 of the conductor on the same layer, different second conductor groups The two slots of each conductor of the second conductor group are located in the radially adjacent 1st and 2nd layers of the stator core, and the two slots of each conductor of the other second conductor group are located in the radially adjacent 3rd and 4th layers of the stator core; the two slots of the first sixth conductor 350 of the second conductor group are located in the core slots 1 and 10, the two slots of the second sixth conductor 350 of the second conductor group are located in the core slots 2 and 11, and the two slots of the third sixth conductor 350 of the second conductor group are located in the core slots 3 and 12. It can be seen that the two slots of the three sixth conductors 350 of the second conductor group are respectively located in three circumferentially adjacent core slots of the stator core.

[0053] like Figure 5 、 Figure 15 、 Figure 16 、 Figure 17As shown, in Examples 4 to 6, the second conductor group includes: three different conductors, namely, two second large conductors 300-1A and one second small conductor 300-1B, each conductor in the second large conductor 300-1A and the second small conductor 300-1B of the second conductor group includes two slot interiors 301 located inside different core slots of two radially adjacent layers of the stator core, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axial outer end 25 of the core slot 21 and is connected to the two slot interiors 301 of the conductor, two welding ends 303 located outside the core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 are located at the axial outer end 26 of the core slot 21 and are respectively connected to the two slot interiors 301 of the conductor in the same layer, and each conductor of different second conductor groups The two slots are located in the radially adjacent first and second layers of the stator core, and the two slots of each conductor of the other second conductor group are located in the radially adjacent third and fourth layers of the stator core; the two slots of the first second large conductor 300-1A of the second conductor group are located in the core slots 1 and 11, the two slots of the second second large conductor 300-1A of the second conductor group are located in the core slots 2 and 12, and the two slots of the second small conductor 300-1B of the second conductor group are located in the core slots 3 and 10. It can be seen that the two slots of the first second large conductor 300-1A of the second conductor group and the two slots of the second second large conductor 300-1A are located in two circumferentially adjacent core slots of the stator core in sequence, and the slots of the two second large conductors 300-1A surround the two slots of the second small conductor 300-1B.

[0054] like Figure 9As shown, in embodiment eight, the second conductor group includes: three different conductors, namely a second large conductor 300-2A and two second small conductors 300-2B, each conductor in the second large conductor 300-2A and the second small conductor 300-2B of the second conductor group includes two slot interiors 301 located inside different core slots of two radially adjacent layers of the stator core, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axial outer end 25 of the core slot 21 and is connected to the two slot interiors 301 of the conductor, two welding ends 303 located outside the core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 are located at the axial outer end 26 of the core slot 21 and are respectively connected to the two slot interiors 301 of the conductor in the same layer, and the two conductors of each conductor of the different second conductor groups are connected. The interiors of the slots are located in the radially adjacent 1st and 2nd layers of the stator core, and the interiors of the two slots of each conductor of the other second conductor group are located in the radially adjacent 3rd and 4th layers of the stator core; the interiors of the two slots of the second large conductor 300-2A of the second conductor group are located in the core slots 1 and 12, the interiors of the two slots of the first second small conductor 300-2B of the second conductor group are located in the core slots 2 and 10, and the interiors of the two slots of the second second small conductor 300-2B of the second conductor group are located in the core slots 3 and 11. It can be seen that the interiors of the two slots of the first second small conductor 300-2B of the second conductor group and the interiors of the two slots of the second second small conductor 300-2B are located in two circumferentially adjacent core slots of the stator core in sequence, and the interiors of the two slots of the second large conductor 300-2A surround the interiors of the slots of the two second small conductors 300-2B.

[0055] like Figures 1 to 19 As shown, in Examples 1 to 9, 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 core slots in two radially adjacent layers of the stator core, a wire plug-in end 302 located outside the core slot 21, the wire plug-in end 302 is located at the axially outer end 25 of the core slot 21 and is connected to the two slot interiors 301 of the conductor, two welding ends 303 located outside the core slot and extending in opposite directions (the two welding ends extend in opposite directions), the two welding ends 303 are located at the axially outer end 26 of the core slot 21 and are respectively connected to the two slot interiors 301 of the conductor in the same layer, and the two slot interiors of each conductor of the third conductor group are located at the radially adjacent second and third layers of the stator core.

[0056] like Figure 3 、 Figures 12 to 19As shown, in Examples 1 to 6, the fourth conductor group includes: two fourth large conductors 100-1A and a 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 core slots in the same radial direction of the stator core, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axial outer end 25 of the core slot 21 and is connected to the two slot interiors 301 of the conductor, two welding ends 303 (both to the right) located outside the core slot and extending in the same direction, the two welding ends 303 are located at the axial outer end 26 of the core slot 21 and are respectively connected to the two slot interiors 301 of the conductor at the same layer. Each conductor of the fourth conductor group The two slots of the first fourth large conductor 100-1A of the fourth conductor group are located in the first radially innermost layer (the fourth radially outermost layer); the two slots of the first fourth large conductor 100-1A of the fourth conductor group are located in the core slots 19 and 29, the two slots of the second fourth large conductor 100-1A of the fourth conductor group are located in the core slots 20 and 30, and the two slots of the fourth small conductor 100-1B of the fourth conductor group are located in the core slots 21 and 28. It can be seen that the two slots of the first fourth large conductor 100-1A of the fourth conductor group and the two slots of the second fourth large conductor 100-1A are located in two circumferentially adjacent core slots of the stator core in sequence, and the slots of the two fourth large conductors 100-1A surround the two slots of the fourth small conductor 100-1B. The technical solution for the motor stator in the embodiments of the application eliminates the busbars connected in series between the phase windings in the related art. The first, second, third, and fourth conductor groups of each phase can be directly connected, allowing each phase winding and neutral point to be located in any core slot and any layer of the winding. This reduces the complexity of the manufacturing process, lowers production costs, reduces material costs, and improves processing efficiency. Therefore, the technical solution of the embodiments of the application effectively solves the problems of complex manufacturing processes, high production costs, and low processing efficiency of hairpin windings in the related art.

[0057] Combine Figure 8In the seventh embodiment, the fourth conductor group includes: a fourth large conductor 100-2A, 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 core slots of the same radial direction of the stator core, a plug-in end 302 located outside the core slot 21, the plug-in end 302 is located at the axial outer end 25 of the core slot 21 and connected to the two slot interiors 301 of the conductor, two welding ends 303 (both to the right) located outside the core slot and extending in the same direction, the two welding ends 303 are located at the axial outer end 26 of the core slot 21 and respectively connected to the two slot interiors 301 of the conductor on the same layer, and the two slot interiors of each conductor of the fourth conductor group The first layer of the radially innermost layer of the stator core is located in the radially outermost layer (the fourth layer of the radially outermost layer); the two slot interiors of the first fourth large conductor 100-2A of the fourth conductor group are located in the core slots 19 and 30, the two slot interiors of the first fourth small conductor 100-2B of the fourth conductor group are located in the core slots 20 and 28, and the two slot interiors of the second fourth small conductor 100-2B of the fourth conductor group are located in the core slots 21 and 29. It can be seen that the two slot interiors of the first fourth small conductor 100-2B of the fourth conductor group and the two slot interiors of the second fourth small conductor 100-2B are located in two circumferentially adjacent core slots of the stator core in sequence, and the two slot interiors of the fourth large conductor 100-2A surround the slot interiors of the two fourth small conductors 200-2B. The technical solution for the motor stator in the embodiments of the application eliminates the busbars connected in series between the phase windings in the related art. The first, second, third, and fourth conductor groups of each phase can be directly connected, allowing each phase winding and neutral point to be located in any core slot and any layer of the winding. This reduces the complexity of the manufacturing process, lowers production costs, reduces material costs, and improves processing efficiency. Therefore, the technical solution of the embodiments of the application effectively solves the problems of complex manufacturing processes, high production costs, and low processing efficiency of hairpin windings in the related art.

[0058] like Figure 3 、 Figure 4 As shown, in embodiment 1, the two slots of the first conductor of the first conductor group are respectively located in the core slots 28 and 37, from which it can be seen that the pitch between the two slots of the first conductor is a full pitch 9 (pitch 9 is a full pitch in this embodiment), the two slots of the fourth large conductor of the fourth conductor group are respectively located in the core slots 19 and 29, from which it can be seen that the pitch between the two slots of the fourth large conductor 100-1A is a long pitch 10, and the two slots of the fourth small conductor of the fourth conductor group are respectively located in the core slots 21 and 28, from which it can be seen that the pitch between the two slots of the fourth small conductor 100-1B is a short pitch 7.

[0059] like Figure 2 、 Figure 8As shown, in Example 7, the two slots of the first conductor of the first conductor group are respectively located in the stator core slots 28 and 37. It can be seen that the pitch between the two slots of the first conductor is a full pitch 9 (in this embodiment, the pitch 9 is a full pitch). The two slots of the fourth large conductor of the fourth conductor group are respectively located in the core slots 19 and 30. It can be seen that the pitch between the two slots of the fourth large conductor 100-2A is a long pitch 11. The two slots of the fourth small conductor of the fourth conductor group are respectively located in the core slots 20 and 28. It can be seen that the pitch between the two slots of the fourth small conductor 100-1B is a short pitch 8.

[0060] Combine Figure 12 、 Figure 19In the first embodiment, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups. When the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together. The welding end located on the first radial layer of the stator core is the first connection welding end, the welding end located on the second radial layer of the stator core is the second connection welding end, and the welding end located on the third radial layer of the stator core is the third connection welding end. A connecting welding end, the welding end located in the fourth radial layer of the stator core is the second connecting welding end, and the sum of the spans of the first connecting welding ends and the second connecting welding ends adjacent to each other in the same radial direction of the stator core is a full pitch 9; specifically, the pitch between the first connecting welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the fourth radial layer of the stator core and the second connecting welding end of a welding end of a sixth conductor 350 or a third conductor 250 located in the third layer adjacent to the stator core in the same radial direction is a full pitch 9, and the pitch between the first connecting welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the second radial layer of the stator core is a full pitch 9. The pitch at which the first connection welding end of the other welding end of the body 250 is connected to the second connection welding end of a welding end of a sixth conductor 350 or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the same radially adjacent first layer of the stator core is a full pitch of 9; the two slots of the first sixth conductor of the second conductor group are located in the core slots 1 and 10 respectively, the two slots of the second sixth conductor of the second conductor group are located in the core slots 2 and 11 respectively, and the two slots of the third sixth conductor of the second conductor group are located in the core slots 3 and 12 respectively, that is, the three conductors of the second conductor group have the same pitch, and the two slots of the sixth conductor are located in the core slots 1 and 10 respectively. The pitch between the two slots is a full pitch of 9. The two slots of the first third conductor 250 of the third conductor group are located in the core slots 19 and 28. The two slots of the second third conductor 250 of the third conductor group are located in the core slots 20 and 29. The two slots of the third third conductor 250 of the third conductor group are located in the core slots 21 and 30. That is, the three conductors of the third conductor group are the same third conductor 250, and the pitch between the two slots of the third conductor 250 is a full pitch of 9. It can be seen that in Example 1, the pitch of the three conductors (sixth conductor) of the second conductor group is the same as the pitch of the three conductors (third conductors) of the two third conductor groups of the phase winding.

[0061] Combine Figure 13 、 Figure 19In the second embodiment, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups, and when the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends 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. The span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is . The sum is a full pitch of 9; specifically, the pitch at which the first connecting welded end of a welding end of a first conductor 150 or a sixth conductor 350 located in the fourth layer in the same radial direction of the stator core is connected to the second connecting welded end of a welding end of a sixth conductor 350 or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the third layer adjacent in the same radial direction of the stator core is a full pitch of 9, and the pitch at which the first connecting welded end of another welding end of a sixth conductor 350 or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the second layer in the same radial direction of the stator core is connected to the second connecting welded end of a welding end of a sixth conductor 350 or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the first layer adjacent in the same radial direction of the stator core is a full pitch of 9;The two slots of the first sixth conductor of the second conductor group are located in core slots 1 and 10, respectively. The two slots of the second sixth conductor of the second conductor group are located in core slots 2 and 11, respectively. The two slots of the third sixth conductor of the second conductor group are located in core slots 3 and 12, respectively. That is, the three conductors of the second conductor group have the same pitch, and the pitch between the two slots of the sixth conductor is a full pitch of 9. 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 of the third conductor group are located in core slots 19 and 29, respectively. The second fifth large conductor 200-1B of the third conductor group is located in core slots 19 and 29, respectively. The two slots of the fifth large conductor 200-1A are located in stator core slots 20 and 30, respectively. The two slots of the fifth small conductor 200-1B of the third conductor group are located in core slots 21 and 28, respectively. That is, the pitch between the two slots of the two fifth large conductors 200-1A is a long pitch of 10, and the pitch between the two slots of the one fifth small conductor 200-1B is a short pitch of 7. 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 adjacent circumferential core slots of the stator core, and the slots of the two fifth large conductors 200-1A surround the fifth small conductor 200-1B of the third conductor group.

[0062] Combine Figure 10In the eighth embodiment, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups, and when the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends 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. The span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is 1. The sum is a full pitch of 9; specifically, the pitch at which the first connecting welded end of a welding end of a first conductor 150 or a sixth conductor 350 located in the same radial direction of the fourth layer of the stator core is connected to the second connecting welded end of a welding end of a sixth conductor 350 or a fifth large conductor 200-2A or a fifth small conductor 200-2B located in the third layer adjacent to the stator core in the same radial direction is a full pitch of 9, and the pitch at which the first connecting welded end of another welding end of a sixth conductor 350 or a fifth large conductor 200-2A or a fifth small conductor 200-2B located in the second layer of the stator core in the same radial direction is connected to the second connecting welded end of a welding end of a sixth conductor 350 or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the first layer adjacent to the stator core in the same radial direction is a full pitch of 9;The two slots of the first sixth conductor of the second conductor group are located in the core slots 1 and 10 respectively, the two slots of the second sixth conductor of the second conductor group are located in the core slots 2 and 11 respectively, and the two slots of the third sixth conductor of the second conductor group are located in the core slots 3 and 12 respectively. That is, the three conductors of the second conductor group have the same pitch, and the pitch between the two slots of the sixth conductor is a full pitch of 9. 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 the core slots 19 and 30 respectively, and the first fifth small conductor 200-2B of the third conductor group has a pitch of 9. The two slots of the second fifth small conductor 200-2B of the third conductor group are located in stator core slots 20 and 28, respectively. The two slots of the second fifth small conductor 200-2B of the third conductor group are located in core slots 21 and 29, respectively. That is, the pitch between the two slots of a fifth large conductor 200-2A is a long pitch of 11, and the pitch between the two slots of two fifth small conductors 200-1B is a short pitch of 7. The two slots of the first fifth small conductor 200-2B of the third conductor group and the two slots of the second fifth small conductor 200-1B are located in two adjacent circumferential core slots of the stator core, respectively. The slot interior of the fifth large conductor 200-1A surrounds the two fifth small conductors 200-2B of the third conductor group.

[0063] Combine Figure 14 、 Figure 19As shown, in embodiment 3, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two different third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups, and when the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends 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. The sum of the span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is a full pitch 9. Specifically, the pitch between the first connecting welded end of a welding end of a first conductor 150 or a sixth conductor 350 located in the same radial direction of the fourth layer of the stator core and the second connecting welded end of a welding end of a sixth conductor 350 or a third conductor 250 or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the third layer adjacent to the stator core in the same radial direction is a full pitch 9, and the pitch between the first connecting welded end of another welding end of a sixth conductor 350 or a fifth large conductor 200-1A or a fifth small conductor 200-1B or a third conductor 250 located in the second layer of the stator core in the same radial direction and the second connecting welded end of a welding end of a sixth conductor 350 or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the first layer adjacent to the stator core in the same radial direction is a full pitch 9;The two slots of the first sixth conductor of the second conductor group are located in the core slots 1 and 10 respectively, the two slots of the second sixth conductor of the second conductor group are located in the core slots 2 and 11 respectively, and the two slots of the third sixth conductor of the second conductor group are located in the core slots 3 and 12 respectively, that is, the three conductors of the second conductor group have the same pitch, and the pitch between the two slots of the sixth conductor is a full pitch of 9. The three conductors of the first 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 of the third conductor group are located in the core slots 19 and 29 respectively, the two slots of the second fifth large conductor 200-1A of the third conductor group are located in the core slots 20 and 30 respectively, and the two slots of the fifth small conductor 200-1B of the third conductor group are located in the core slots 21 and 28 respectively, that is, the pitch between the two slots of the fifth large conductor 200-1A is a long pitch of 10, and the two slots of the fifth small conductor 200-1B are The pitch between them is a short pitch of 7. The two slots of the first fifth large conductor 200-1A of the third conductor group and the two slots of the second fifth large conductor 200-1A are sequentially located in two circumferentially adjacent core slots of the stator core, and the slots of the two fifth large conductors 200-1A surround the fifth small conductor 200-1B of the third conductor group. The two slots of the first third conductor 250 of the second third conductor group of this phase winding are located in core slots 28 and 37, the two slots of the second third conductor 250 of the third conductor group are located in core slots 29 and 38, and the two slots of the third third conductor 250 of the third conductor group are located in core slots 30 and 39. The three conductors of the second third conductor group are the same third conductor 250, that is, the pitch between the two slots of the third conductor 250 is a full pitch of 9. Therefore, in Example 3, the pitch of the three conductors (sixth conductors) of the second conductor group is the same as the pitch of the three conductors (third conductors) of the third conductor group of this phase winding.

[0064] Combine Figure 15 、 Figure 19As shown, in embodiment 4, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups. When the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends 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, and the welding end located in the third radial layer of the stator core is the first connection welding end. The welding end located in the fourth radial layer of the stator core is the second connecting welding end. The sum of the spans of the first connecting welding ends and the second connecting welding ends adjacent to each other in the same radial direction of the stator core is a full pitch of 9. Specifically, the first connecting welding end of a welding end of a first conductor 150 or a second large conductor 300-1A or a second small conductor 300-1B located in the fourth radial layer of the stator core is connected to the second connecting welding end of a welding end of a second large conductor 300-1A or a second small conductor 300-1B located in the third radial layer adjacent to the stator core is a full pitch of 9. The pitch at which the first connection welding end of the other welding end of a second large conductor 300-1A or a second small conductor 300-1B or a third conductor 250 in the second layer in the same radial direction is connected to the second connection welding end of a welding end of the second large conductor 300-1A or the second small conductor 300-1B or the fourth large conductor 100-1A or the fourth small conductor 100-1B in the first layer adjacent to the stator core in the same radial direction is a full pitch 9; the two slots of the first second large conductor of the second conductor group are located in the core slots 1 and 11 respectively, the two slots of the second second large conductor of the second conductor group are located in the core slots 2 and 12 respectively, and the second small conductor of the second conductor group is located in the core slots 2 and 12 respectively. The two slots of the first third conductor 250 of the third conductor group are located in core slots 19 and 28, the two slots of the second third conductor 250 of the third conductor group are located in core slots 20 and 29, and the two slots of the third third conductor 250 of the third conductor group are located in core slots 21 and 30. In other words, the three conductors of the third conductor group are identical third conductors 250, and the pitch between the two slots of the third conductor 250 is a full pitch. Therefore, the two slots of the three third conductors 250 of the third conductor group are located in three circumferentially adjacent core slots of the stator core.

[0065] Combine Figure 10In the tenth embodiment, each phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups, and when the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together. The welding end located on the first radial layer of the stator core is the first connection welding end, the welding end located on the second radial layer of the stator core is the second connection welding end, the welding end located on the third radial layer of the stator core is the first connection welding end, and the welding end located on the fourth radial layer of the stator core is the second connection welding end. The sum of the spans of the first connecting welded ends and the spans of the second connecting welded ends adjacent to each other in the same radial direction of the stator core is a full pitch of 9. Specifically, the pitch between the first connecting welded end of a welded end of a first conductor 150 or a second large conductor 300-1A or a second small conductor 300-1B located in the fourth layer in the same radial direction of the stator core and the second connecting welded end of a welded end of a second large conductor 300-1A or a second small conductor 300-1B located in the third layer in the same radial direction of the stator core is a full pitch of 9, and the pitch between the second connecting welded end of a welded end of a second large conductor 300-1A or a second small conductor 300-1B located in the second layer in the same radial direction of the stator core is a full pitch of 9. The pitch at which the first connection welding end of the other welding end of the fifth large conductor 200-2A or the fifth small conductor 200-2B is connected to the second connection welding end of one welding end of the second large conductor 300-1A or the second small conductor 300-1B or the fourth large conductor 100-1A or the fourth small conductor 100-1B located in the same radially adjacent first layer of the stator core is a full pitch 9; the two slots of the first second large conductor of the second conductor group are located in the core slots 1 and 11 respectively, the two slots of the second second large conductor of the second conductor group are located in the core slots 2 and 12 respectively, and the two slots of the second small conductor of the second conductor group are located in the slots 3 and 10 respectively, that is, the two slots of the two second large conductors of the second conductor group are located between the two slots. The pitch is a long pitch of 10, the pitch between the two slots of a second small conductor of the second conductor group is a short pitch of 7, the two slots of the fifth large conductor 200-2A of the third conductor group are located in the core slots 19 and 30, the two slots of the first fifth small conductor 200-2B of the third conductor group are located in the core slots 20 and 28, and the two slots of the second fifth small conductor 200-2B of the third conductor group are located in the core slots 21 and 29, that is, the three conductors of the third conductor group are a fifth large conductor 200-2A and two fifth small conductors 200-2B, that is, the pitch between the two slots of a second large conductor of the third conductor group is a long pitch of 11, and the pitch between the two slots of a second small conductor of the second conductor group is a short pitch of 8.

[0066] Combine Figure 16 、 Figure 19As shown, in embodiment 5, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups. When the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends 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. The sum of the span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is the full pitch 9. Specifically, a first conductor 1 located in the same radial fourth layer of the stator core is connected to the stator core. The pitch at which the first connecting welded end of one welding end of 50 or a second large conductor 300-1A or a second small conductor 300B is connected to the second connecting welded end of one welding end of a second large conductor 300-1A or a second small conductor 300-1B or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the third layer adjacent in the same radial direction of the stator core is a full pitch of 9, and the pitch at which the first connecting welded end of another welding end of a second large conductor 300-1A or a second small conductor 300-1B or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the second layer adjacent in the same radial direction of the stator core is connected to the second connecting welded end of one welding end of the second large conductor 300-1A or a second small conductor 300-1B or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the first layer adjacent in the same radial direction of the stator core is a full pitch of 9;The two slots of the first second-largest conductor of the second conductor group are located in slots 1 and 11, respectively. The two slots of the second second-largest conductor of the second conductor group are located in core slots 2 and 12, respectively. The two slots of the second small conductor of the second conductor group are located in slots 3 and 10, respectively. That is, the pitch between the two slots of the two second-largest conductors of the second conductor group is a long pitch of 10, and the pitch between the two slots of the one second small conductor of the second conductor group is a short pitch of 7. 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 of the third conductor group are located in core slots 19 and 29, respectively. The two slots of the second fifth large conductor 200-1A of the third conductor group are located in core slots 20 and 30, respectively. The two slots of the fifth small conductor 200-2B of the third conductor group are located in core slots 21 and 28, respectively. That is, the pitch between the two slots of the two fifth large conductors 200A of the third conductor group is a long pitch of 10, and the pitch between the two slots of one fifth small conductor 200B of the third conductor group is a short pitch of 7. Therefore, in Example 5, the pitch of the three conductors of the second conductor group (two second large conductors and one second small conductor) is the same as the pitch of the three conductors of the third conductor group of the phase winding (two fifth large conductors and one fifth small conductor).

[0067] Combine Figure 17 、 Figure 19As shown, in embodiment 6, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two different third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups, and when the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends 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. The sum of the span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is the full pitch 9. Specifically, a first conductor 150 or a second large conductor 30 located in the same radial fourth layer of the stator core is connected to each other. The pitch at which the first connecting welding end of a welding end of a second large conductor 300-1A or a second small conductor 300-1B is connected to the second connecting welding end of a welding end of a second large conductor 300-1A or a second small conductor 300-1B or a third conductor 250 or a fifth large conductor 200-1A or a fifth small conductor 200-1B located in the third layer adjacent in the same radial direction of the stator core is a full pitch of 9, and the pitch at which the first connecting welding end of another welding end of a second large conductor 300-1A or a second small conductor 300-1B or a fifth large conductor 200-1A or a fifth small conductor 200-1B or a third conductor 250 located in the second layer adjacent in the same radial direction of the stator core is connected to the second connecting welding end of a welding end of a second large conductor 300-1A or a second small conductor 300-1B or a fourth large conductor 100-1A or a fourth small conductor 100-1B located in the first layer adjacent in the same radial direction of the stator core is a full pitch of 9;The two slots of the first second large conductor of the second conductor group are respectively located in slots 1 and 11, the two slots of the second second large conductor of the second conductor group are respectively located in core slots 2 and 12, and the two slots of the second small conductor of the second conductor group are respectively located in slots 3 and 10, that is, the pitch between the two slots of the two second large conductors of the second conductor group is a long pitch 10, and the pitch between the two slots of the second small conductor of the second conductor group is a short pitch 7. The first third conductor group includes two fifth large conductors 200-1A and one fifth small conductor 200-1B. The two slots of the fifth large conductor 200-1A of the third conductor group are respectively located in core slots 19 and 29, and the two slots of the fifth small conductor 200-1B of the third conductor group are respectively located in core slots 21 and 28, that is, the pitch between the two slots of the two fifth large conductors 200-1A is a long pitch 10, and the pitch between the two slots of the fifth small conductor 200-1B is a short pitch 7. The two slot interiors of a fifth large conductor 200-1A and the two slot interiors of a second fifth large conductor 200-1A are sequentially located in two circumferentially adjacent core slots of the stator core, and the slot interiors of the two fifth large conductors 200-1A surround the two slot interiors of the fifth small conductor 200-1B. The two slot interiors of the first third conductor 250 of the second third conductor group are located in core slots 28 and 37, respectively. The two slot interiors of the second third conductor 250 of the third conductor group are located in core slots 29 and 38, and the two slot interiors of the third third conductor 250 of the third conductor group are located in core slots 30 and 39. That is, the three conductors of the third conductor group are the same third conductor 250, and the pitch between the two slot interiors of the third conductor 250 is a full pitch. Therefore, in the third embodiment, the pitch of the three conductors of the second conductor group (two second large conductors and one second small conductor) is the same as the pitch of the three conductors of the third conductor group of the phase winding (two fifth large conductors and one fifth small conductor).

[0068] Combine Figure 18 、 Figure 19As shown, in embodiment 9, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 2Q third conductor groups. In this embodiment, Q is equal to 1, that is, it contains two identical third conductor groups. When the even number of layers is 6, the U-phase winding includes 4 third conductor groups. When the even number of layers is 8, the U-phase winding includes 6 third conductor groups. The phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends 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. The sum of the span of the first connection welding ends and the span of the second connection welding ends adjacent to each other in the same radial direction of the stator core is the full pitch 9. Specifically, a first conductor 15 located in the same radial fourth layer of the stator core is connected to the stator core. The pitch at which the first connecting welded end of one welding end of 0 or one second large conductor 300-2A or one second small conductor 300-2B is connected to the second connecting welded end of one welding end of a second large conductor 300-2A or one second small conductor 300-2B or one fifth large conductor 200-1A or one fifth small conductor 200-1B located in the third layer adjacent in the same radial direction of the stator core is a full pitch of 9, and the pitch at which the first connecting welded end of another welding end of a second large conductor 300-2A or one second small conductor 300-2B or one fifth large conductor 200-1A or one fifth small conductor 200-1B located in the second layer adjacent in the same radial direction of the stator core is connected to the second connecting welded end of one welding end of the second large conductor 300-1A or one second small conductor 300-1B or one fourth large conductor 100-1A or one fourth small conductor 100-1B located in the first layer adjacent in the same radial direction of the stator core is a full pitch of 9;The three conductors of the second conductor group are a second large conductor and two second small conductors. The two slots of the second large conductor 300-2A of the second conductor group are located in slots 1 and 12 respectively. The two slots of the first second small conductor 300-2B of the second conductor group are located in core slots 2 and 10 respectively. The two slots of the second second small conductor 300-2B of the second conductor group are located in slots 3 and 11 respectively. That is, the pitch between the two slots of the second large conductor of the second conductor group is a long pitch 11, and the pitch between the two slots of the two second small conductors of the second conductor group is a short pitch 8. The third conductor group includes two fifth conductors. The first fifth large conductor 200-1A of the third conductor group has two slots located in core slots 19 and 29, respectively. The second fifth large conductor 200-1A of the third conductor group has two slots located in core slots 20 and 30, respectively. The fifth small conductor 200-2B of the third conductor group has two slots located in core slots 21 and 28, respectively. That is, the pitch between the slots of the two fifth large conductors 200A of the third conductor group is a long pitch of 10, and the pitch between the slots of the fifth small conductor 200B of the third conductor group is a short pitch of 7.

[0069] In the eleventh embodiment, the three conductors of the third conductor group are identical third conductors 250. The two slots of the first third conductor 250 of the third conductor group are located in stator core slots 19 and 28, respectively. The two slots of the second third conductor 250 of the third conductor group are located in core slots 20 and 29, respectively. The two slots of the third third conductor 250 of the third conductor group are located in core slots 21 and 30, respectively. That is, the three conductors of the third conductor group are identical third conductors 250, and the pitch between the two slots of the third conductor 250 is a full pitch. The third conductor group of the eleventh embodiment is different from that of the ninth embodiment, but the remaining structures are the same and are not further described here.

[0070] Combine Figures 1 to 12In this embodiment, the two welding ends of the first conductor of the first conductor group of the phase winding (U-phase winding, V-phase winding, or W-phase winding) are both located at the end 25 outside the stator slot, the two welding ends of the second large conductor of the second conductor group are both located at the end 25 outside the stator slot, the two welding ends of the second small conductor of the second conductor group are both located at the end 25 outside the stator slot, the two welding ends of the third conductor or the fifth large conductor and the fifth small conductor of the third conductor group are both located at the end 25 outside the stator slot, and the two welding ends of the fourth large conductor and the fourth small conductor of the fourth conductor group are both located at the end 25 outside the stator slot. That is, each welding end of each conductor of each conductor group of each phase winding is located at the end 25 outside the stator slot. The plug-in ends of the first conductor of the first conductor group of the phase winding (U-phase winding or V-phase winding or W-phase winding) are all located at the end 26 outside the stator slot, the plug-in ends of the second large conductor of the second conductor group are all located at the end 26 outside the stator slot, the plug-in ends of the second small conductor of the second conductor group are all located at the end 26 outside the stator slot, the plug-in ends of the third conductor of the third conductor group, and / or the fifth large conductor and the fifth small conductor are all located at the end 26 outside the stator slot, the plug-in ends of the fourth large conductor and the fourth small conductor of the fourth conductor group are all located at the end 26 outside the stator slot, that is, each plug-in end of each conductor of each conductor group of each phase winding is located at the end 26 outside the stator slot.

[0071] This embodiment further provides a motor, including the above-mentioned motor stator, and a motor using the above-mentioned motor stator.

[0072] The motor provided by the embodiment of the present invention includes the motor stator in the above embodiment. Therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0073] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium (bus connection), or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above in the present invention can be understood according to the specific circumstances. Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used.

[0074] Those skilled in the art will understand that the present invention is not limited to the embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for 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 many other equivalent embodiments without departing from the concept of the present invention. 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 a radially inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core; a stator winding, comprising a plurality of phase windings mounted on the stator core and forming an even number of layers in a radial direction of the stator core; It is characterized in that: each phase winding is composed of multiple conductor groups connected in series along the circumferential direction of the stator core; The plurality of conductor groups include: a first conductor group, a plurality of second conductor groups, a plurality of third conductor groups and a fourth conductor group; The first conductor group includes: three identical first conductors, each of the first conductors including two slot interiors located in 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, and the two slot interiors of each first conductor of the first conductor group are located in the radially outermost layer of the stator core; The second conductor group includes: two second large conductors and one second small conductor, or the second conductor group includes: one second large conductor and two second small conductors; or the second conductor group includes: three identical sixth conductors; Each conductor of the second conductor group includes two slot interiors located in different core slots, a wire insertion 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 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 third conductor group includes: three conductors, each conductor of the third conductor group includes two slot interiors located in different core slots, a wire insertion end located outside the core slot, and two welding ends located outside the core slot and extending in opposite directions, and the two slot interiors of each conductor of the third conductor group are respectively located in 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 in different core slots, a wire plug end located outside the core slot, and two welding 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 located in the radially innermost layer of the stator core.

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

3. The motor stator according to claim 1, characterized in that: The pitch of the two second large conductors of the second conductor group is 10, and the pitch of the one second small conductor of the second conductor group is 7; or the pitch of the one second large conductor of the second conductor group is 11, and the pitch of the two second small conductors of the second conductor group is 8; or the pitch of the three sixth conductors of the second conductor group is 9.

4. The motor stator according to claim 3, characterized in that: The conductor pitch of the second conductor group is the same as the conductor pitch of at least one of the third conductor groups of the phase winding.

5. The motor stator according to claim 3, characterized in that: The pitch of the two second large conductors of the second conductor group is 10, and the pitch of the one second small conductor of the second conductor group is 7; the three conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a full pitch, and / or the three conductors of the third conductor group are one fifth large conductor and two fifth small conductors.

6. The motor stator according to claim 3, characterized in that: The pitch of the second large conductor of the second conductor group is 11, and the pitch of the two second small conductors of the second conductor group is 8; the three conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a full pitch, and / or the three conductors of the third conductor group are two fifth large conductors and one fifth small conductor.

7. The motor stator according to claim 3, characterized in that: The pitch between the two slots of the sixth conductor of the second conductor group is 9 inches; the three conductors of the third conductor group are two fifth large conductors and one fifth small conductor, and / or the three conductors of the third conductor group are one fifth large conductor and two fifth small conductors.

8. The motor stator according to any one of claims 5 to 7, characterized in that: The pitch between the two slots of the two fifth large conductors of the third conductor group is 10, the pitch between the two slots of the one fifth small conductor of the third conductor group is 7, the pitch between the two slots of the one fifth large conductor of the third conductor group is 11, and the pitch between the two slots of the two fifth small conductors of the third conductor group is 8.

9. The motor stator according to claim 1, 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 same radially adjacent M-1 layers of the stator core are first connection welding ends, and the welding ends located in the same radially adjacent M layers of the stator core are second connection welding ends. The sum of the spans of the first connection welding ends and the second connection welding ends is 9, and M is an even number.

10. A motor, characterized in that: The motor stator comprises the stator according to any one of claims 1 to 9.

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