Motor stator winding, motor stator and motor

Abstract

The present invention provides a motor stator winding, comprising at least one coil group 1, which is arranged in two radially adjacent layers of the stator core; at least one coil group 2, which is arranged in two radially adjacent layers of the stator core; coil group 3, which is arranged in the first radially inner layer or the first radially outer layer of the stator core; coil group 4, which is arranged in the first radially opposite layer of coil group 3 in the stator core; wherein the lapped winding rotation direction of coil group 1 is opposite to the lapped winding rotation direction of coil group 2. The beneficial effect of the present invention is that the types of conductors used are small, the arrangement method is simple, the busbars and busbars can be eliminated, so that the twisting direction and twisting slot pitch of the welding end extending inside the slot of the same radial layer in the stator core slot are consistent, so that the lead end and the neutral point between the phase windings are arranged in any slot and any layer in the same radial direction, the complexity of the manufacturing process is reduced, the production cost is reduced, and the processing efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a motor stator winding, 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] In view of the above problems, the present invention provides a motor stator winding to solve the above or other problems existing in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a motor stator winding, comprising:

[0005] At least one coil group 1 is provided in two radially adjacent layers of the stator core;

[0006] At least one coil group 2, provided in two radially adjacent layers of the stator core;

[0007] Coil group three, coil group three is arranged in the first layer on the radial inner side or the first layer on the radial outer side of the stator core;

[0008] Coil group four, coil group four is arranged in the first layer of the stator core, which is radially opposite to coil group three;

[0009] The lap-winding rotation direction of the coil group 1 is opposite to the lap-winding rotation direction of the coil group 2.

[0010] Furthermore, the coil group 1 and the coil group 2 each include a plurality of conductors or a plurality of conductor groups, and the plurality of conductors or the plurality of conductor groups are sequentially arranged along the circumference of the stator core, and the winding rotation direction of the plurality of conductors or the plurality of conductor groups of the coil group 1 is opposite to the winding rotation direction of the plurality of conductors or the plurality of conductor groups of the coil group 2;

[0011] The conductor group includes a first conductor and a second conductor, and the first conductor is arranged outside the second conductor.

[0012] Furthermore, the conductor, the first conductor, and the second conductor each include a conductor body, a first welding end, and a second welding end. The first welding end and the second welding end are both connected to the conductor body, and the first welding end and the second welding end extend along the circumferential direction of the stator core. The extension directions of the first welding end and the second welding end are opposite to each other or opposite to each other.

[0013] The conductor body includes an insert wire end, slot one and slot two, one end of slot one and one end of slot two are both connected to the insert wire end, slot one and slot two are respectively arranged in two radially adjacent layers of the stator core, and the span between slot one and slot two is a full pitch, a long pitch or a short pitch.

[0014] Furthermore, the extension direction of the welding end 1 of the conductor or conductor group of coil group 1 is opposite to the extension direction of the welding end 1 of the conductor or conductor group of coil group 2; the sum of the extension spans of the two welded welding ends 1 and 2 is the full pitch;

[0015] During the overlapping winding rotation, the wire insertion end of the coil group 1 rotates in the opposite direction to the wire insertion end of the coil group 2.

[0016] Furthermore, the span between the inner slot 1 and the inner slot 2 of the conductor is a full span;

[0017] The span between the first and second slots of conductor one is a long pitch, and the span between the first and second slots of conductor two is a short pitch; or, the span between the first and second slots of conductor one is a short pitch, and the span between the first and second slots of conductor two is a long pitch.

[0018] Furthermore, the coil group three includes a plurality of conductors three, and the plurality of conductors three are sequentially arranged along the circumferential side of the stator core; wherein the conductor three includes a welding end portion three and a welding end portion four, and the welding end portion three and the welding end portion four both extend along the circumferential direction of the stator core, and the sum of the extension spans of the two welded welding ends three and the welding end portion one or the welding end portion two is a full pitch, or the sum of the extension spans of the two welded welding ends four and the welding end portion one or the welding end portion one is a full pitch, and the welding end portion three and the welding end portion four extend in the same direction;

[0019] Conductor three also includes slot inner three and slot inner four. Slot inner three and slot inner four are both arranged at the same radial layer of the stator core. The span between slot inner three and slot inner four is a short pitch or a long pitch.

[0020] Furthermore, the coil group four includes a plurality of conductors four, which are sequentially arranged along the circumference of the stator core; wherein the conductor four includes a welding end portion five and a welding end portion six, and the welding end portion five and the welding end portion six both extend along the circumference of the stator core, and the sum of the extension spans of the two welded welding ends five and the welding end portion one or the welding end portion two is a full pitch, or the sum of the extension spans of the two welded welding ends six and the welding end portion one or the welding end portion two is a full pitch, and the welding end portion five and the welding end portion six extend in the same direction;

[0021] Conductor 4 further includes slot inner 5 and slot inner 6. Slot inner 5 and slot inner 6 are both arranged at the same radial layer of the stator core, and the span between slot inner 5 and slot inner 6 is a full pitch.

[0022] Furthermore, the number of radial layers of the stator core is an even number greater than or equal to 6.

[0023] A motor stator comprises a stator core and the above-mentioned motor stator winding, wherein the stator winding is arranged on the stator core.

[0024] A motor comprises the above-mentioned motor stator.

[0025] Due to the adoption of the above technical solution, there are at least one coil group one and at least one coil group two, and the coil group one and the coil group two are arranged on the stator core, and the coil group one and the coil group two are both arranged on two adjacent layers of the stator core. At the same time, the coil group one is composed of a plurality of conductors or conductor groups of the same structure stacked together, and the coil group two is composed of a plurality of conductors or conductor groups of the same structure stacked together, and the structure of the conductors or conductor groups of the coil group one is similar to that of the conductors or conductor groups of the coil group two. The types of conductors used are few, the arrangement method is simple, and busbars and busbars can be eliminated. The welding end of the coil group one and the welding end of the coil group two extend in opposite directions, and the stacking rotation direction of the coil group one and the coil group two is opposite, so that the twisting direction and twisting slot pitch of the welding end extending inside the slot of the same radial layer in the stator core slot 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, reducing the complexity of the manufacturing process, reducing production costs, and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a schematic diagram of the stator structure of embodiment 1 of the present invention;

[0027] Figure 2 is a schematic structural diagram of a stator winding according to a first embodiment of the present invention;

[0028] Figure 3 1 is a schematic structural diagram of a first-phase winding of a stator winding according to a first embodiment of the present invention;

[0029] Figure 4 yes Figure 3 Another perspective structural diagram of the stator winding;

[0030] Figure 5 1 is a schematic structural diagram of the conductor 3 of the coil assembly 3 according to the first embodiment of the present invention;

[0031] Figure 6 1 is a schematic structural diagram of a conductor of a coil assembly 1 according to a first embodiment of the present invention;

[0032] Figure 7 1 is a schematic structural diagram of the conductor of the coil assembly 2 according to the first embodiment of the present invention;

[0033] Figure 8 1 is a schematic structural diagram of a conductor 4 of a coil assembly 4 according to embodiment 1 of the present invention;

[0034] Figure 9 Schematic diagram of the stator winding method of the first embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the distributed connection structure of a phase winding in the first embodiment of the present invention;

[0036] Figure 11 is a structural diagram of a stator winding according to a second embodiment of the present invention;

[0037] Figure 12 1 is a schematic structural diagram of a single-phase winding of a stator winding according to a second embodiment of the present invention;

[0038] Figure 13 1 is a schematic structural diagram of a conductor 1 of a coil assembly 1 according to a second embodiment of the present invention;

[0039] Figure 14 1 is a schematic structural diagram of the conductor 2 of the coil assembly 1 according to the second embodiment of the present invention;

[0040] Figure 15 1 is a schematic structural diagram of the conductor 1 of the coil assembly 2 according to the second embodiment of the present invention;

[0041] Figure 16 is a schematic structural diagram of a conductor 2 of a coil assembly 2 according to a second embodiment of the present invention;

[0042] Figure 17 is a schematic structural diagram of a conductor group of a coil group 1 according to a second embodiment of the present invention;

[0043] Figure 18 is a structural schematic diagram of a conductor group of a coil group 2 according to a second embodiment of the present invention;

[0044] Figure 19 Schematic diagram of the stator winding method of the second embodiment of the present invention;

[0045] Figure 20 This is a schematic diagram of the distributed connection structure of a phase winding of the second embodiment of the present invention;

[0046] Figure 21 is a schematic structural diagram of a stator winding according to a third embodiment of the present invention;

[0047] Figure 22 1 is a schematic structural diagram of a single-phase winding of a stator winding according to a third embodiment of the present invention;

[0048] Figure 23 Schematic diagram of the stator winding method of the third embodiment of the present invention;

[0049] Figure 24 is a schematic structural diagram of a stator winding according to a fourth embodiment of the present invention;

[0050] Figure 25 3 is a schematic structural diagram of a single-phase winding of a stator winding according to a fourth embodiment of the present invention.

[0051] In the picture:

[0052] 10. Stator winding 20. Stator core 21. Slot

[0053] 22. Tooth 110. Coil group three 120. Coil group one

[0054] 130, coil group 2 140, coil group 4 210, conductor 3

[0055] 220, conductor 230 of coil group 1, conductor 240 of coil group 2, conductor 4

[0056] 1-301-1, slot three 1-301-2, slot four 1-302, plug-in end

[0057] 1-303-1, welding end three 1-303-2, welding end four 2-301-1, slot inside one

[0058] 2-301-2, inside the slot 2 2-302, plug-in end 2-303-1, welding end 1

[0059] 2-303-2, welding end two 3-301-1, groove inside one 3-301-2, groove inside two

[0060] 3-302, plug-in end 3-303-1, welding end one 3-303-2, welding end two

[0061] 4-301-1, slot inside 5 4-301-2, slot inside 6 4-302, plug-in end

[0062] 4-303-1, welding end 5 4-303-2, welding end 6 220A, conductor 1

[0063] 220B, conductor 2 2A-301-1, inside slot 1 2A-301-2, inside slot 2

[0064] 2A-302, plug-in end 2A-303-1, welding end one 2A-303-2, welding end two

[0065] 2B-301-1, slot inside 1 2B-301-2, slot inside 2 2B-302, plug-in end

[0066] 2B-303-1, welding end one 2B-303-2, welding end two 230A, conductor one

[0067] 230B, conductor 2 3A-301-1, inside slot 1 3A-301-2, inside slot 2

[0068] 3A-302, plug-in end 3A-303-1, welding end one 3A-303-2, welding end two

[0069] 3B-301-1, inside slot 1 3B-301-2, inside slot 2 3B-302, plug-in end

[0070] 3B-303-1, welding end one 3B-303-2, welding end two 220', conductor group

[0071] 230', conductor group DETAILED DESCRIPTION

[0072] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0073] Figure 1-25 The present invention shows a schematic structural diagram of some embodiments of the present invention, specifically showing the structure of some embodiments. Some embodiments of the present invention all relate to a motor stator winding, a motor stator and a motor. The motor stator winding has multiple coil groups one and coil group two. Each coil group one or coil group two is composed of multiple conductors with the same structure, and the structures of the conductors in different coil groups are similar. At the same time, the winding rotation directions of coil group one and coil group two are opposite, so that the stator winding uses fewer types of conductors and a simple arrangement. Busbars and busbars are eliminated, so that the twisting direction and twisting slot pitch of the slots located in the same radial layer in the stator core slots extending to the outer ends of the slots are consistent, so that 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.

[0074] A motor stator winding 10, such as Figure 1-25 Shown, including,

[0075] At least one coil group 120 is disposed in two radially adjacent layers of the stator core 20. The coil group 120 may be one or more, and each coil group 120 is disposed in two radially adjacent layers of the stator core 20.

[0076] At least one second coil group 130 is disposed in two radially adjacent layers of the stator core 20 . The number of the second coil group 130 may be one or more. Each second coil group 130 is disposed in two radially adjacent layers of the stator core 20 .

[0077] The coil group 1 120 and the coil group 2 130 can be arranged adjacent to each other or spaced apart, depending on actual needs.

[0078] The lap winding rotation direction of the first coil group 120 is opposite to the lap winding rotation direction of the second coil group 130. That is, if the lap winding rotation direction of the first coil group 120 is clockwise, then the lap winding rotation direction of the second coil group 130 is counterclockwise; alternatively, if the lap winding rotation direction of the first coil group 120 is counterclockwise, then the lap winding rotation direction of the second coil group 130 is clockwise. The arrangement is made according to actual needs. The arrangement of opposite lap winding rotation directions simplifies the arrangement of the first coil group 120 and the second coil group 130. The twisting direction and twisting slot pitch of each coil group are consistent, which simplifies the manufacturing process and improves the processing efficiency.

[0079] Specifically, coil group 1 120 and coil group 2 130 each include multiple conductors or multiple conductor groups, and the multiple conductors or multiple conductor groups are arranged in sequence along the circumference of the stator core 20. The stacking rotation direction of the multiple conductors or multiple conductor groups of coil group 1 120 is opposite to the stacking rotation direction of the multiple conductors or multiple conductor groups of coil group 2 130. Coil group 1 120 is composed of multiple conductors or conductor groups arranged in sequence along the circumference of the stator core 20, and stacked and concentrically arranged. Each conductor or conductor group is arranged in two adjacent layers. The multiple conductors or conductor groups have the same rotation direction when stacked, so that the twisting mode of the multiple conductors or conductor groups of coil group 1 120 is consistent, which facilitates the installation of coil group 120 on the stator core 20. The number of conductors or conductor groups of coil group 1 120 is selected according to the number of slots in the stator core 20. Similarly, coil group 1 The second coil group 130 is composed of multiple conductors or conductor groups arranged in sequence along the circumference of the stator core 20 and stacked and concentrically arranged. Each conductor or conductor group is arranged in two adjacent layers. The multiple conductors or conductor groups rotate in the same direction when stacked, so that the multiple conductors or conductor groups of the second coil group 130 are twisted in a consistent manner, which facilitates the installation of the second coil group 130 on the stator core 20. The number of conductors or conductor groups in the second coil group 130 is selected according to the number of slots in the stator core 20. When the first coil group 120 and the second coil group 130 are stacked and installed on the stator core 20, the stacking rotation direction of the first coil group 120 is opposite to the stacking rotation direction of the second coil group 130. This ensures that the conductors or conductor groups of the same layer of the stator core 20, located outside the slots, have the same twist direction and twist span, making the overall stator winding 10 structure simple.

[0080] Among them, the conductor is a single structure, and the conductor group is a combined structure. The conductor group includes conductor one and conductor two. Conductor one is arranged around the outside of conductor two, and conductor one and conductor two are coaxially arranged. Conductor two is arranged inside conductor one, conductor two surrounds conductor one, and conductor one and conductor two are roughly the same in structure, so that the structure of a single conductor group is roughly the same as the structure of a single conductor, and thus the overall structure of coil group one 120 and coil group two 130 is similar, which facilitates the coil group one 120 and coil group two 130 to be stacked and installed on the stator core 20, and at the same time, the structures are complementary in space, the structure is compact, the arrangement method is simple, and the space occupied is small.

[0081] The coil group 1 120 can be formed by stacking multiple conductors or stacking multiple conductor groups, and each conductor or each conductor group is arranged in two adjacent layers of the stator core 20; the coil group 2 130 can be formed by stacking multiple conductors or stacking multiple conductor groups, and each conductor or each conductor group is arranged in two adjacent layers of the stator core 20; when the coil group 1 120 and the coil group 2 130 are stacked on the stator core 20, it can be: one coil group 1 120, one coil group 2 130, or one coil group 1 120, multiple coil groups 2 130, or multiple coil groups 1 120, one Coil group 2 130, or multiple coil groups 1 120, multiple coil groups 2 130, are selected according to actual needs; wherein, each coil group 1 120 can include multiple conductors or multiple conductor groups, and each coil group 2 130 can include multiple conductors or conductor groups, which are selected according to actual needs, so that the types of conductors constituting coil group 1 and coil group 2 are small, the arrangement is simple, bus bars and bus bars are eliminated, and 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, so as to facilitate the arrangement of the lead ends and neutral points between the windings of each phase in any slot and any layer of the same radial direction.

[0082] The aforementioned conductors, conductor 1, and conductor 2 have similar structures. Each conductor, conductor 1, and conductor 2 includes a conductor body, a first welding end, and a second welding end. Both the first welding end and the second welding end are connected to the conductor body and extend circumferentially along the stator core 20. The first welding end and the second welding end extend in opposite directions or in opposite directions. The first welding end and the second slot end plate are located at one end of the exterior of the stator core 20. The first welding end and the second welding end are respectively connected to the ends of the conductor body. This connection is preferably integrally formed. Both the first welding end and the second welding end extend circumferentially along the stator core 20 for a predetermined length, which corresponds to the specified slot pitch and is selected based on actual needs.

[0083] The extension directions of welding end 1 and welding end 2 are opposite to each other, that is, the extension directions of welding end 1 and welding end 2 are opposite. At the same time, welding end 1 and welding end 2 can be extended in opposite directions or extended away from each other, which can be set according to actual needs.

[0084] The welding ends 1 and 2 of the conductor or conductor group of coil group 120 and the welding ends 1 and 2 of the conductor or conductor group of coil group 2 130 extend in opposite directions and are selected according to actual needs.

[0085] In some of the following embodiments, the extension directions of the welding end 1 of the conductor or conductor group of coil group 120 and the welding end 1 of the conductor or conductor group of coil group 2 130 are opposite. Preferably, the extension directions of the welding end 1 and welding end 2 of the conductor or conductor group of coil group 120 and the welding end 1 and welding end 2 of the conductor or conductor group of coil group 2 130 are both towards each other, and one extends towards each other, and the other extends away from each other.

[0086] The extension length of welding end one and welding end two is the specified slot pitch, which is selected according to actual needs. Preferably, in some of the following embodiments, the extension length of welding end one and welding end two is half of the full pitch, and the sum of the extension spans of the two welded welding end one and welding end two is the full pitch.

[0087] The conductor body includes a plug-in end, slot 1, and slot 2. One end of slot 1 and one end of slot 2 are both connected to the plug-in end. Slot 1 and slot 2 are respectively located in two radially adjacent layers of the stator core 20. The span between slot 1 and slot 2 is a full pitch, a long pitch, or a short pitch. The plug-in end is U-shaped or V-shaped, located at the other end outside the stator core 20, indicating the twist direction of the welded end of the coil assembly. One end of slot 1 and one end of slot 2 are respectively connected to the two ends of the plug-in end, and this connection method is preferably integrally formed. During stacking rotation, the plug-in end of coil assembly 1 120 and the plug-in end of coil assembly 2 130 turn in opposite directions, so that the stacking rotation direction of coil assembly 120 is opposite to that of coil assembly 2 130.

[0088] Slot interior 1 and slot interior 2 are located in two slots of two radially adjacent layers of the stator core 20, and the span between slot interior 1 and slot interior 2 is separated by a specified slot pitch, which can be a full pitch, a long pitch, or a short pitch, selected based on actual needs. The span between slot interior 1 and slot interior 2 of the conductors of coil assembly 1 120 and the span between slot interior 1 and slot interior 2 of the conductors of coil assembly 2 130 can be the same, both being a full pitch or a long pitch and a short pitch; alternatively, the span between slot interior 1 and slot interior 2 of the conductors of coil assembly 1 120 and the span between slot interior 1 and slot interior 2 of the conductors of coil assembly 2 130 can be different, with the span between slot interior 1 and slot interior 2 of the conductors of one coil assembly being a full pitch and the span between slot interior 1 and slot interior 2 of the conductors of the other coil assembly being a long pitch and a short pitch, selected based on actual needs.

[0089] In the conductor group of coil assembly 120, the span between the first and second slots of conductor 1 is different from the span between the first and second slots of conductor 2. In coil assembly 120 formed from this conductor group, the span between the first and second slots of conductor 1 is greater than the span between the first and second slots of conductor 2. This allows conductor 2 to be positioned within conductor 1, with conductor 1 surrounding conductor 2, thus forming the conductor group structure. When the span between the first and second slots of conductor 1 is long pitch, the span between the first and second slots of conductor 2 is short pitch; alternatively, when the span between the first and second slots of conductor 1 is short pitch, the span between the first and second slots of conductor 2 is long pitch.

[0090] The stator winding 10 further includes a coil group 3 110 , which is disposed concentrically in the first radially inner layer or the first radially outer layer of the stator core 20 .

[0091] The coil group three 110 includes multiple conductor threes 210, which are arranged in sequence along the circumferential side of the stator core 20; wherein the structure of the conductor three 210 is similar to that of the conductor, including a welding end, a wire insertion end and the inside of the slot, and the wire insertion end, the inside of the slot and the welding end are connected in sequence.

[0092] The welding end includes welding end three and welding end four, and both welding end three and welding end four extend along the circumference of the stator core. The extension length of welding end three and welding end four is a specified slot pitch. Preferably, the specified slot pitch is half of the full pitch, and the sum of the extension spans of the two welded welding ends three and welding end one or welding end two is a full pitch, or the sum of the extension spans of the two welded welding ends four and welding end one or welding end two is a full pitch.

[0093] The third welding end and the fourth welding end have the same extension direction and are selected according to actual needs.

[0094] The inner slot includes inner slot three and inner slot four. The inner slot three and inner slot four are both arranged at the same radial layer of the stator core. The span between the inner slot three and inner slot four is a short pitch or a long pitch, which is selected according to actual needs.

[0095] The stator winding 10 also includes a fourth coil set 140, which is disposed in the first layer of the stator core 20, radially opposite to the third coil set. The arrangement is concentric, depending on actual needs. When the third coil set 110 is disposed in the first radially inner layer of the stator core 20, the fourth coil set 140 is disposed in the Nth radial layer of the stator core, where N is the largest radial layer of the stator core. Alternatively, when the third coil set 110 is disposed in the first radially outer layer of the stator core 20, the fourth coil set 140 is disposed in the first radially inner layer of the stator core.

[0096] The coil group four 140 includes multiple conductors four 240, and the multiple conductors four 240 are arranged in sequence along the circumferential side of the stator core 20; wherein, the structure of the conductor four 240 is similar to the structure of the conductor, including a welding end, an inserting end and the inside of the slot, and the inserting end, the inside of the slot and the welding end are connected in sequence.

[0097] The welding end includes welding end five and welding end six, and both welding end five and welding end six extend along the circumference of the stator core. The extension length of welding end five and welding end six is ​​a specified slot pitch. Preferably, the specified length is half of the full pitch, and the extension span of the two welded welding ends five and welding end one or welding end two is a full pitch, or the sum of the extension spans of the two welded welding ends six and welding end one or welding end two is a full pitch.

[0098] The fifth welding end portion and the sixth welding end portion extend in the same direction, in opposite directions, or in opposite directions, which can be selected according to actual needs.

[0099] The inner slot includes the fifth inner slot and the sixth inner slot. The fifth inner slot and the sixth inner slot are both arranged at the same radial layer of the stator core. The span between the fifth inner slot and the sixth inner slot is a full pitch, a short pitch or a long pitch, which is selected according to actual needs.

[0100] A motor stator includes a stator core 20 and the above-mentioned motor stator winding 10. The stator winding 10 is arranged on the stator core 20. The coil groups of the stator winding 10 in each phase are connected in series in sequence.

[0101] The stator core 20 is formed by stacking multiple annular magnetic steel plates with multiple insulating papers inserted within the slots of these plates. Alternatively, it can be formed by stacking other annular metal plates, depending on actual needs. The stator core 20 has two axial end faces. The radial inner surface of the stator core 20 has multiple slots 21 spaced at a predetermined slot pitch along the circumferential direction of the stator core. The side walls of the slots form teeth 22, meaning that two adjacent slots 21 define a tooth 22. The stator winding 10 is mounted on the stator core 20. The stator winding 10 is three-phase, with the coil groups in each phase of the stator winding 10 connected in series. Specifically, the coil groups in the U phase, the V phase, and the W phase are connected in series, with at least two slots per pole and phase. The stator core 20 has an even number of radial layers, at least six, depending on actual needs.

[0102] A motor comprises the above-mentioned motor stator.

[0103] In some of the following embodiments, the stator winding 10 is a three-phase stator winding, the number of slots per pole per phase is 2, the rotor has 12 magnetic poles, and this is the case for each phase of the three-phase stator winding 10, then the number of slots 21 arranged in the stator core 20 is equal to 72.

[0104] Example 1:

[0105] like Figure 1-4 As shown, the stator winding 10 includes a coil group 3 110, at least one coil group 1 120, at least one coil group 2 130, and a coil group 4 140, which are sequentially arranged from the inside to the outside.

[0106] like Figure 2-4 As shown in , 9, and 10, the coil group three 110 is located in the first layer on the radial inner side of the stator core 20, and may also be located in the first layer on the radial outer side of the stator core 20. In this embodiment, the coil group three 110 is located in the first layer on the radial inner side of the stator core 20, the coil group one 120 is located in the second and third layers on the radial inner side of the stator core 20, the coil group two 130 is located in the fourth and fifth layers on the radial inner side of the stator core 20, and the coil group four 140 is located in the sixth layer on the radial inner side of the stator core 20;

[0107] Figure 5 、 9As shown in FIG. 10 , the coil group three 110 includes a plurality of conductor threes 210. In this embodiment, the coil group three 110 includes 36 conductor threes 210. The conductor three 210 includes a welding end three 1-303-1, a slot inner three 1-301-1, a plug-in end 1-302, a slot inner four 1-301-2, and a welding end four 1-303-2 connected in sequence to form a U-shaped conductor three 210. The slot inner three 1-301-1 and the slot inner four 1-301-2 are respectively connected. The stator core 20 is located in two slots 21 of the same radial layer with a specified slot distance. In this embodiment, the pitch between the inner slot three 1-301-1 and the inner slot four 1-301-2 is X, X is a short pitch, and the short pitch is preferably 5; the plug-in end portion 1-302 is located outside one axial end of the stator core 20, and the two ends of the plug-in end portion 1-302 are respectively connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; the welding end portion 1-303 is connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; 1-303-1 and the fourth welding end portion 1-303-2 are located outside the other axial end of the stator core 20, the third welding end portion 1-303-1 is connected to the inner portion 1-301-1 of the slot, and the fourth welding end portion 1-303-2 is connected to the inner portion 1-301-2 of the slot. The third welding end portion 1-303-1 and the fourth welding end portion 1-303-2 both extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch. The entire pitch is preferably 6, and the extension directions of the welding end three 1-303-1 and the welding end four 1-303-2 both extend in the same circumferential direction of the stator core 20; the welding end three 1-303-1 and the welding end four 1-303-2 and the slot interior three 1-301-1 and the slot interior four 1-301-2 are all located in the same layer, that is, the 36 conductors three 210 of the coil group three 110 are located in the 72 slots of the first layer on the radial inner side of the stator core 20.

[0108] like Figure 6 、 9 As shown in FIG. 10 , the coil assembly 120 includes a plurality of conductors 220. In this embodiment, the coil assembly 120 includes 72 conductors 220. Figure 6As shown, the conductor 220 includes a welding end portion 2-303-1, a slot interior portion 2-301-1, a wire end portion 2-302, a slot interior portion 2-301-2, and a welding end portion 2-303-2 connected in sequence to form a U-shaped conductor 220. The slot interior portion 2-301-1 and the slot interior portion 2-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, the slot interior portion 2-301-1 and the slot interior portion 2-303-2 are connected in sequence to form a U-shaped conductor 220. The inner two 2-301-2 are respectively located in the second and third layers of the radial direction of the stator core 20, and the interval between the slot inner one 2-301-1 and the slot inner two 2-301-2 is Y, Y is the full pitch, and the full pitch is preferably 6; the plug-in end 2-302 is located outside one axial end of the stator core 20, and the plug-in end 2-302 is respectively connected to the slot inner one 2-301-1 and the slot inner two 2-301-2; the welding end one 2-303-1 is connected to The second welding end portion 2-303-2 is located outside the other axial end of the stator core 20, the first welding end portion 2-303-1 is connected to the inner portion 2-301-1 of the slot, the second welding end portion 2-303-2 is connected to the inner portion 2-301-2 of the slot, and the first welding end portion 2-303-1 and the second welding end portion 2-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, which is preferably 6, and the welding end portion The end portion 1 2-303-1 and the welding end portion 2-303-2 extend in opposite directions and are far away from each other; the welding end portion 1 2-303-1 and the slot interior 1 2-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end portion 2-303-2 and the slot interior 2-301-2 are located in the other layer, such as the third layer, that is, the 72 conductors 220 of the coil group 120 are located in the 72 slots of the second and third layers on the radial inner side of the stator core 20.

[0109] like Figure 7 、 9 As shown in FIG. 10 , the coil group 2 130 includes a plurality of conductors 230 . In this embodiment, the coil group 2 includes 72 conductors 230 . Figure 7As shown, the conductor 230 includes a welding end portion 1 3-303-1, a slot interior 1 3-301-1, a wire end portion 3-302, a slot interior 2 3-301-2, and a welding end portion 2 3-303-2 connected in sequence to form a U-shaped conductor 230. The slot interior 1 3-301-1 and the slot interior 2 3-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, the slot interior 1 3-301-1 and the slot interior 2 The inner two 3-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the pitch between the slot inner one 3-301-1 and the slot inner two 3-301-2 is Y, Y is the full pitch, and the full pitch is preferably 6; the plug-in end 3-302 is located outside one axial end of the stator core 20, and the plug-in end 3-302 is respectively connected to the slot inner one 3-301-1 and the slot inner two 3-301-2; the welding end one 3-303-1 is connected to the welding end The second end portion 3-303-2 is located outside the other axial end of the stator core 20, the welding end portion 1 3-303-1 is connected to the inner portion 1 3-301-1 of the slot, the welding end portion 2 3-303-2 is connected to the inner portion 2 3-301-2 of the slot, and the welding end portion 1 3-303-1 and the welding end portion 2 3-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6, and the welding end portion 1 3-303-1 is connected to the inner portion 1 3-301-2 of the slot. -303-1 and the welding end part 2 3-303-2 extend in opposite directions and are close to each other; the welding end part 1 3-303-1 and the slot interior 1 3-301-1 are located in one of the two radially adjacent layers of the stator core 20, such as the fourth layer, and the welding end part 2 3-303-2 and the slot interior 2 3-301-2 are located in the other layer, such as the fifth layer, that is, the 72 conductors 230 of the coil group 2 130 are located in the 48 slots of the fourth and fifth layers on the radial inner side of the stator core 20.

[0110] like Figure 8 、 9 As shown in FIG. 10 , the coil group 140 includes a plurality of conductors 240. In this embodiment, the coil group 140 includes 36 conductors 240. Figure 5As shown, the conductor four 240 includes a welding end five 4-303-1, a slot interior five 4-301-1, a wire end 4-302, a slot interior six 4-301-2, and a welding end six 4-303-2 connected in sequence to form a U-shaped conductor four 240. The slot interior five 4-301-1 and the slot interior six 4-301-2 are located in two slots 21 of the same radial layer of the stator core 20 and separated by a specified slot distance. In this embodiment, the slot interior five 4-301-1 and the slot interior six 4-301-2 are both Located at the sixth layer in the radial direction of the stator core 20, the pitch between the inner slot five 4-301-1 and the inner slot six 4-301-2 is Y, Y is the full pitch, and the short pitch is preferably 6; the plug-in wire end 4-302 is located outside one axial end of the stator core 20, and the plug-in wire end 4-302 is connected to the inner slot five 4-301-1 and the inner slot six 4-301-2 respectively; the welding end five 4-303-1 and the welding end six 4-303-2 are located outside the other axial end of the stator core 20, The welding end 5 4-303-1 is connected to the inner part of the slot 5 4-301-1, and the welding end 6 4-303-2 is connected to the inner part of the slot 6 4-301-2. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend in the same direction, and the welding end 5 4-303-1 The extension direction is opposite to that of the welding end six 4-303-2, that is, the welding end in the coil group three 110 and the welding end in the coil group four 140 extend in the circumferential direction of the stator core 20 in the opposite direction; the welding end five 4-303-1 and the welding end six 4-303-2 are located in the same layer as the slot inside five 4-301-1 and the slot inside six 4-301-2, such as the sixth layer, that is, the 36 conductors four 240 of the coil group four 140 are located in the 72 slots of the sixth layer on the radial inner side of the stator core 20.

[0111] Example 2

[0112] The stator winding 10 includes a coil group 3 110, at least one coil group 1 120, at least one coil group 2 130, and a coil group 4 140, which are sequentially arranged from the inside to the outside.

[0113] like Figure 11-12 As shown in , 19, and 20, the coil group three 110 is located in the first layer on the radial inner side of the stator core 20, and may also be located in the first layer on the radial outer side of the stator core 20. In this embodiment, the coil group three 110 is located in the first layer on the radial inner side of the stator core 20, the coil group one 120 is located in the second and third layers on the radial inner side of the stator core 20, the coil group two 130 is located in the fourth and fifth layers on the radial inner side of the stator core 20, and the coil group four 140 is located in the sixth layer on the radial inner side of the stator core 20;

[0114] Figure 5 、 19 As shown in FIG. 20 , the coil group three 110 includes a plurality of conductor threes 210. In this embodiment, the coil group three 110 includes 36 conductor threes 210. The conductor three 210 includes a welding end three 1-303-1, a slot inner three 1-301-1, a plug-in end 1-302, a slot inner four 1-301-2, and a welding end four 1-303-2 connected in sequence to form a U-shaped conductor three 210. The slot inner three 1-301-1 and the slot inner four 1-301-2 are respectively connected. The stator core 20 is located in two slots 21 of the same radial layer with a specified slot distance. In this embodiment, the pitch between the inner slot three 1-301-1 and the inner slot four 1-301-2 is X, X is a short pitch, and the short pitch is preferably 5; the plug-in end portion 1-302 is located outside one axial end of the stator core 20, and the two ends of the plug-in end portion 1-302 are respectively connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; the welding end portion 1-303 is connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; 1-303-1 and the fourth welding end portion 1-303-2 are located outside the other axial end of the stator core 20, the third welding end portion 1-303-1 is connected to the inner portion 1-301-1 of the slot, and the fourth welding end portion 1-303-2 is connected to the inner portion 1-301-2 of the slot. The third welding end portion 1-303-1 and the fourth welding end portion 1-303-2 both extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch. The entire pitch is preferably 6, and the extension directions of the welding end three 1-303-1 and the welding end four 1-303-2 both extend in the same circumferential direction of the stator core 20; the welding end three 1-303-1 and the welding end four 1-303-2 and the slot interior three 1-301-1 and the slot interior four 1-301-2 are all located in the same layer, that is, the 36 conductors three 210 of the coil group three 110 are located in the 72 slots of the first layer on the radial inner side of the stator core 20.

[0115] like Figure 13 、 14 As shown in Figures 17, the coil group 120 includes multiple conductor groups 220', which include 36 conductor groups 220'220 in this embodiment. The conductor group 220' includes a conductor 1 220A and a conductor 2 220B. The conductor 1 220A is arranged outside the conductor 2 220B, and the conductor 1 220A surrounds the conductor 2 220B. The conductor 1 220A and the conductor 2 220B have similar structures and are coaxially arranged.

[0116] like Figure 13As shown, the conductor 1 220A includes a welding end 1 2A-303-1, a slot interior 1 2A-301-1, a wire end 2A-302, a slot interior 2 2A-301-2, and a welding end 2A-303-2 connected in sequence to form a U-shaped conductor 1 220A. The slot interior 1 2A-301-1 and the slot interior 2 2A-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 2A-301-1 and the slot interior 2A-301-2 are respectively located in the second and third layers in the radial direction of the stator core 20, and the slot interior 2A-301-1 and the slot interior 2A-301-2 are separated by a pitch of Z, Z is a long pitch, and the long pitch is preferably 7; the wire insertion end 2A-302 is located outside one axial end of the stator core 20, and the wire insertion end 2A-302 is respectively separated by the slot interior 2A-301-1 and the slot interior 2 2A-301-2 connection; welding end 1 2A-303-1 and welding end 2 2A-303-2 are located outside the other axial end of the stator core 20, welding end 1 2A-303-1 is connected to the slot inside 1 2A-301-1, welding end 2 2A-303-2 is connected to the slot inside 2 2A-301-2, welding end 1 2A-303-1 and welding end 2 2A-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 2A-303-1 and the welding end 2A-303-2 extend in opposite directions and away from each other; the welding end 2A-303-1 and the slot interior 2A-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end 2A-303-2 and the slot interior 2A-301-2 are located in another layer, such as the third layer.

[0117] like Figure 14As shown, the conductor 220B includes a welding end 2B-303-1, a slot interior 2B-301-1, a wire end 2B-302, a slot interior 2B-301-2, and a welding end 2B-303-2 connected in sequence to form a U-shaped conductor 220B. The slot interior 2B-301-1 and the slot interior 2B-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 2B-301-1 and the slot interior 2B-301-2 are respectively located in the second and third layers in the radial direction of the stator core 20, and the slot interior 2B-301-1 and the slot interior 2B-301-2 are separated by a pitch of X, X is a short pitch, and the short pitch is preferably 5; the wire end 2B-302 is located outside one axial end of the stator core 20, and the wire end 2B-302 is respectively separated by the slot interior 2B-301-1 and the slot interior 2B-301-2. 2B-301-2 connection; welding end 1 2B-303-1 and welding end 2 2B-303-2 are located outside the other axial end of the stator core 20, welding end 1 2B-303-1 is connected to the slot inside 1 2B-301-1, welding end 2 2B-303-2 is connected to the slot inside 2 2B-301-2, welding end 1 2B-303-1 and welding end 2 2B-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 2B-303-1 and the welding end 2B-303-2 extend in opposite directions and away from each other; the welding end 2B-303-1 and the slot interior 2B-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end 2B-303-2 and the slot interior 2B-301-2 are located in another layer, such as the third layer.

[0118] like Figure 17 As shown, the conductor 1 220A surrounds the conductor 2 220B. In this embodiment, the slot interior 1 2A-301-1 and the slot interior 2 2A-301-2 of the conductor 1 220A are respectively located in the first slot and the eighth slot of the stator core 20, and the slot interior 1 2B-301-1 and the slot interior 2 2B-301-2 of the conductor 2 220B are respectively located in the second slot and the seventh slot of the stator core 20. Figure 18 As shown, conductor one 220A surrounds conductor two 220B, and the 36 conductor groups 220 ′ of coil group one 120 are located in the 72 slots of the second and third layers on the radial inner side of the stator core 20 .

[0119] like Figure 15 、 16As shown in Figures 18, the coil group 2 130 includes a plurality of conductor groups 230', and in this embodiment, includes 36 conductor groups 230'. The conductor group 230' includes a first conductor 230A and a second conductor 230B. The first conductor 230A is arranged outside the second conductor 230B. The first conductor 230A surrounds the second conductor 230B. The first conductor 230A and the second conductor 230B have similar structures and are coaxially arranged.

[0120] like Figure 15 As shown, the conductor 1 230A includes a welding end 1 3A-303-1, a slot interior 1 3A-301-1, a wire end 3A-302, a slot interior 2 3A-301-2, and a welding end 2 3A-303-2 connected in sequence to form a U-shaped conductor 1 230A. The slot interior 1 3A-301-1 and the slot interior 2 3A-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 3A-301-1 and the slot interior 2 3A-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the slot interior 3A-301-1 and the slot interior 2 3A-301-2 are separated by a pitch of Z, Z is a long pitch, and the long pitch is preferably 7; the wire end portion 3A-302 is located outside one axial end of the stator core 20, and the wire end portion 3A-302 is respectively separated from the slot interior 3A-301-1 and the slot interior 2 3A-301-2 connection; welding end 1 3A-303-1 and welding end 2 3A-303-2 are located outside the other axial end of the stator core 20, welding end 1 3A-303-1 is connected to the slot inside 1 3A-301-1, welding end 2 3A-303-2 is connected to the slot inside 2 3A-301-2, welding end 1 3A-303-1 and welding end 2 3A-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 1 3A-303-1 and the welding end 2 3A-303-2 extend in opposite directions and are close to each other; the welding end 1 3A-303-1 and the slot interior 1 3A-301-1 are located in one of the two adjacent layers of the stator core 20, such as the fourth layer, and the welding end 2 3A-303-2 and the slot interior 2 3A-301-2 are located in another layer, such as the fifth layer.

[0121] like Figure 16As shown, the conductor 230B includes a welding end 3B-303-1, a slot interior 3B-301-1, a wire end 3B-302, a slot interior 3B-301-2, and a welding end 3B-303-2 connected in sequence to form a U-shaped conductor 230B. The slot interior 3B-301-1 and the slot interior 3B-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 3B-301-1 and the slot interior 2 3B-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the slot interior 3B-301-1 and the slot interior 2 3B-301-2 are separated by a pitch of X, X is a short pitch, and the short pitch is preferably 5; the wire end 3B-302 is located outside one end of the stator core 20, and the wire end 3B-302 is respectively separated from the slot interior 3B-301-1 and the slot interior 3B-301-2 The first welding end 3B-303-1 and the second welding end 3B-303-2 are located outside the other axial end of the stator core 20, the first welding end 3B-303-1 is connected to the first 3B-301-1 inside the slot, the second welding end 3B-303-2 is connected to the second 3B-301-2 inside the slot, and the first welding end 3B-303-1 and the second welding end 3B-303-2 are along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is 6, and the welding end 1 3B-303-1 and the welding end 2 3B-303-2 extend in opposite directions and are close to each other; the welding end 1 3B-303-1 and the slot inside 1 3B-301-1 are located in one of the two adjacent layers of the stator core 20, such as the fourth layer, and the welding end 2 3B-303-2 and the slot inside 2 3B-301-2 are located in another layer, such as the fifth layer.

[0122] like Figure 18 As shown, the conductor 1 230A surrounds the conductor 2 230B. In this embodiment, the slot interior 1 3A-301-1 and the slot interior 2 3A-301-2 of the conductor 1 230A are respectively located in the first slot and the eighth slot of the stator core 20, and the slot interior 1 3B-301-1 and the slot interior 2 3B-301-2 of the conductor 2 230B are respectively located in the second slot and the seventh slot of the stator core 20. Figure 18 As shown, conductor one 230A surrounds conductor two 230B, and the 36 conductor groups 230 ′ of coil group one are located in the 72 slots of the fourth and fifth layers on the radial inner side of the stator core 20 .

[0123] Figure 8 、 19 As shown in FIG. 20 , the coil group 140 includes a plurality of conductors 240. In this embodiment, the coil group 140 includes 36 conductors 240. Figure 5As shown, the conductor four 240 includes a welding end five 4-303-1, a slot interior five 4-301-1, a wire end 4-302, a slot interior six 4-301-2, and a welding end six 4-303-2 connected in sequence to form a U-shaped conductor four 240. The slot interior five 4-301-1 and the slot interior six 4-301-2 are located in two slots 21 of the same radial layer of the stator core 20 and separated by a specified slot distance. In this embodiment, the slot interior five 4-301-1 and the slot interior six 4-301-2 are both Located at the sixth layer in the radial direction of the stator core 20, the pitch between the inner slot five 4-301-1 and the inner slot six 4-301-2 is Y, Y is the full pitch, and the short pitch is preferably 6; the plug-in wire end 4-302 is located outside one axial end of the stator core 20, and the plug-in wire end 4-302 is connected to the inner slot five 4-301-1 and the inner slot six 4-301-2 respectively; the welding end five 4-303-1 and the welding end six 4-303-2 are located outside the other axial end of the stator core 20, The welding end 5 4-303-1 is connected to the inner part of the slot 5 4-301-1, and the welding end 6 4-303-2 is connected to the inner part of the slot 6 4-301-2. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend in the same direction, and the welding end 5 4-303-1 The extension direction is opposite to that of the welding end six 4-303-2, that is, the welding end in the coil group three 110 and the welding end in the coil group four 140 extend in the circumferential direction of the stator core 20 in the opposite direction; the welding end five 4-303-1 and the welding end six 4-303-2 are located in the same layer as the slot inside five 4-301-1 and the slot inside six 4-301-2, such as the sixth layer, that is, the 36 conductors four 240 of the coil group four 140 are located in the 72 slots of the sixth layer on the radial inner side of the stator core 20.

[0124] Example 3

[0125] The stator winding 10 includes a coil group 3 110, at least one coil group 1 120, at least one coil group 2 130, and a coil group 4 140, which are sequentially arranged from the inside to the outside.

[0126] like Figure 21-23 As shown, coil group three 110 is located in the first radially inner layer of the stator core 20, and may also be located in the first radially outer layer of the stator core 20. In this embodiment, coil group three 110 is located in the first radially inner layer of the stator core 20, coil group one 120 is located in the second and third radially inner layers of the stator core 20, coil group two 130 is located in the fourth and fifth radial layers of the stator core 20, and coil group four 140 is located in the sixth radial layer of the stator core 20.

[0127] Figure 5 and 23 As shown, the coil group three 110 includes a plurality of conductor threes 210. In this embodiment, the coil group three 110 includes 36 conductor threes 210. The conductor three 210 includes a welding end three 1-303-1, a slot inner three 1-301-1, a plug-in end 1-302, a slot inner four 1-301-2, and a welding end four 1-303-2 connected in sequence to form a U-shaped conductor three 210. Among them, the slot inner three 1-301-1 and the slot inner four 1-301-2 are respectively located at In the two slots 21 of the same radial layer of the stator core 20 separated by a specified slot pitch, in this embodiment, the pitch between the inner slot three 1-301-1 and the inner slot four 1-301-2 is X, X is a short pitch, and the short pitch is preferably 5; the plug-in end portion 1-302 is located outside one axial end of the stator core 20, and the two ends of the plug-in end portion 1-302 are respectively connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; the welding end portion 1 -303-1 and welding end four 1-303-2 are located outside the other axial end of the stator core 20, welding end three 1-303-1 is connected to the inner three 1-301-1 of the slot, welding end four 1-303-2 is connected to the inner four 1-301-2 of the slot, welding end three 1-303-1 and welding end four 1-303-2 are extended along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2, in this embodiment Y is a full pitch, the full pitch The pitch is preferably 6, and the extension directions of the welding end three 1-303-1 and the welding end four 1-303-2 extend in the same circumferential direction of the stator core 20; the welding end three 1-303-1 and the welding end four 1-303-2 are all located in the same layer as the slot interior three 1-301-1 and the slot interior four 1-301-2, that is, the 36 conductors three 210 of the coil group three 110 are located in the 72 slots of the first layer on the radial inner side of the stator core 20.

[0128] like Figure 13 、 14 As shown in Figures 17, the coil group 120 includes multiple conductor groups 220', which include 36 conductor groups 220'220 in this embodiment. The conductor group 220' includes a conductor 1 220A and a conductor 2 220B. The conductor 1 220A is arranged outside the conductor 2 220B, and the conductor 1 220A surrounds the conductor 2 220B. The conductor 1 220A and the conductor 2 220B have similar structures and are coaxially arranged.

[0129] like Figure 13As shown, the conductor 1 220A includes a welding end 1 2A-303-1, a slot interior 1 2A-301-1, a wire end 2A-302, a slot interior 2 2A-301-2, and a welding end 2A-303-2 connected in sequence to form a U-shaped conductor 1 220A. The slot interior 1 2A-301-1 and the slot interior 2 2A-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 2A-301-1 and the slot interior 2A-301-2 are respectively located in the second and third layers in the radial direction of the stator core 20, and the slot interior 2A-301-1 and the slot interior 2A-301-2 are separated by a pitch of Z, Z is a long pitch, and the long pitch is preferably 7; the wire insertion end 2A-302 is located outside one axial end of the stator core 20, and the wire insertion end 2A-302 is respectively separated by the slot interior 2A-301-1 and the slot interior 2 2A-301-2 connection; welding end 1 2A-303-1 and welding end 2 2A-303-2 are located outside the other axial end of the stator core 20, welding end 1 2A-303-1 is connected to the slot inside 1 2A-301-1, welding end 2 2A-303-2 is connected to the slot inside 2 2A-301-2, welding end 1 2A-303-1 and welding end 2 2A-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 2A-303-1 and the welding end 2A-303-2 extend in opposite directions and away from each other; the welding end 2A-303-1 and the slot interior 2A-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end 2A-303-2 and the slot interior 2A-301-2 are located in another layer, such as the third layer.

[0130] like Figure 14As shown, the conductor 220B includes a welding end 2B-303-1, a slot interior 2B-301-1, a wire end 2B-302, a slot interior 2B-301-2, and a welding end 2B-303-2 connected in sequence to form a U-shaped conductor 220B. The slot interior 2B-301-1 and the slot interior 2B-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 2B-301-1 and the slot interior 2B-301-2 are respectively located in the second and third layers in the radial direction of the stator core 20, and the slot interior 2B-301-1 and the slot interior 2B-301-2 are separated by a pitch of X, X is a short pitch, and the short pitch is preferably 5; the wire end 2B-302 is located outside one axial end of the stator core 20, and the wire end 2B-302 is respectively separated by the slot interior 2B-301-1 and the slot interior 2B-301-2. 2B-301-2 connection; welding end 1 2B-303-1 and welding end 2 2B-303-2 are located outside the other axial end of the stator core 20, welding end 1 2B-303-1 is connected to the slot inside 1 2B-301-1, welding end 2 2B-303-2 is connected to the slot inside 2 2B-301-2, welding end 1 2B-303-1 and welding end 2 2B-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 2B-303-1 and the welding end 2B-303-2 extend in opposite directions and away from each other; the welding end 2B-303-1 and the slot interior 2B-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end 2B-303-2 and the slot interior 2B-301-2 are located in another layer, such as the third layer.

[0131] like Figure 17 As shown, the conductor 1 220A surrounds the conductor 2 220B. In this embodiment, the slot interior 1 2A-301-1 and the slot interior 2 2A-301-2 of the conductor 1 220A are respectively located in the first slot and the eighth slot of the stator core 20, and the slot interior 1 2B-301-1 and the slot interior 2 2B-301-2 of the conductor 2 220B are respectively located in the second slot and the seventh slot of the stator core 20. Figure 18 As shown, conductor one 220A surrounds conductor two 220B, and the 36 conductor groups 220 ′ of coil group one 120 are located in the 72 slots of the second and third layers on the radial inner side of the stator core 20 .

[0132] like Figure 7 As shown, the coil group 2 130 includes a plurality of conductors 230, and in this embodiment includes 72 conductors 230. Figure 7As shown, the conductor 230 includes a welding end portion 1 3-303-1, a slot interior 1 3-301-1, a wire end portion 3-302, a slot interior 2 3-301-2, and a welding end portion 2 3-303-2 connected in sequence to form a U-shaped conductor 230. The slot interior 1 3-301-1 and the slot interior 2 3-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, the slot interior 1 3-301-1 and the slot interior 2 The inner two 3-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the pitch between the slot inner one 3-301-1 and the slot inner two 3-301-2 is Y, Y is the full pitch, and the full pitch is preferably 6; the plug-in end 3-302 is located outside one axial end of the stator core 20, and the plug-in end 3-302 is respectively connected to the slot inner one 3-301-1 and the slot inner two 3-301-2; the welding end one 3-303-1 is connected to the welding end The second end portion 3-303-2 is located outside the other axial end of the stator core 20, the welding end portion 1 3-303-1 is connected to the inner portion 1 3-301-1 of the slot, the welding end portion 2 3-303-2 is connected to the inner portion 2 3-301-2 of the slot, and the welding end portion 1 3-303-1 and the welding end portion 2 3-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6, and the welding end portion 1 3-303-1 is connected to the inner portion 1 3-301-2 of the slot. -303-1 and the welding end part 2 3-303-2 extend in opposite directions and are close to each other; the welding end part 1 3-303-1 and the slot interior 1 3-301-1 are located in one of the two radially adjacent layers of the stator core 20, such as the fourth layer, and the welding end part 2 3-303-2 and the slot interior 2 3-301-2 are located in the other layer, such as the fifth layer, that is, the 72 conductors 230 of the coil group 2 130 are located in the 48 slots of the fourth and fifth layers on the radial inner side of the stator core 20.

[0133] Figure 8 As shown, the coil group 140 includes a plurality of conductors 240. In this embodiment, the coil group 140 includes 36 conductors 240. Figure 5As shown, the conductor four 240 includes a welding end five 4-303-1, a slot interior five 4-301-1, a wire end 4-302, a slot interior six 4-301-2, and a welding end six 4-303-2 connected in sequence to form a U-shaped conductor four 240. The slot interior five 4-301-1 and the slot interior six 4-301-2 are located in two slots 21 of the same radial layer of the stator core 20 and separated by a specified slot distance. In this embodiment, the slot interior five 4-301-1 and the slot interior six 4-301-2 are both Located at the sixth layer in the radial direction of the stator core 20, the pitch between the inner slot five 4-301-1 and the inner slot six 4-301-2 is Y, Y is the full pitch, and the short pitch is preferably 6; the plug-in wire end 4-302 is located outside one axial end of the stator core 20, and the plug-in wire end 4-302 is connected to the inner slot five 4-301-1 and the inner slot six 4-301-2 respectively; the welding end five 4-303-1 and the welding end six 4-303-2 are located outside the other axial end of the stator core 20, The welding end 5 4-303-1 is connected to the inner part of the slot 5 4-301-1, and the welding end 6 4-303-2 is connected to the inner part of the slot 6 4-301-2. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend in the same direction, and the welding end 5 4-303-1 The extension direction is opposite to that of the welding end six 4-303-2, that is, the welding end in the coil group three 110 and the welding end in the coil group four 140 extend in the circumferential direction of the stator core 20 in the opposite direction; the welding end five 4-303-1 and the welding end six 4-303-2 are located in the same layer as the slot inside five 4-301-1 and the slot inside six 4-301-2, such as the sixth layer, that is, the 36 conductors four 240 of the coil group four 140 are located in the 72 slots of the sixth layer on the radial inner side of the stator core 20.

[0134] Example 4

[0135] The stator winding 10 includes a coil group 3 110, at least one coil group 1 120, at least one coil group 2 130, and a coil group 4 140, which are sequentially arranged from the inside to the outside.

[0136] Coil group three 110 is located in the first radially inner layer of the stator core 20, and may also be located in the first radially outer layer of the stator core 20. In this embodiment, coil group three 110 is located in the first radially inner layer of the stator core 20, coil group one 120 is located in the second and third radially inner layers of the stator core 20, coil group two 130 is located in the fourth and fifth radial layers of the stator core 20, and coil group four 140 is located in the sixth radial layer of the stator core 20.

[0137] Figure 5As shown, the coil group three 110 includes a plurality of conductor threes 210. In this embodiment, the coil group three 110 includes 36 conductor threes 210. The conductor three 210 includes a welding end three 1-303-1, a slot inner three 1-301-1, a plug-in end 1-302, a slot inner four 1-301-2, and a welding end four 1-303-2 connected in sequence to form a U-shaped conductor three 210. Among them, the slot inner three 1-301-1 and the slot inner four 1-301-2 are respectively located at In the two slots 21 of the same radial layer of the stator core 20 separated by a specified slot pitch, in this embodiment, the pitch between the inner slot three 1-301-1 and the inner slot four 1-301-2 is X, X is a short pitch, and the short pitch is preferably 5; the plug-in end portion 1-302 is located outside one axial end of the stator core 20, and the two ends of the plug-in end portion 1-302 are respectively connected to the inner slot three 1-301-1 and the inner slot four 1-301-2; the welding end portion 1 -303-1 and welding end four 1-303-2 are located outside the other axial end of the stator core 20, welding end three 1-303-1 is connected to the inner three 1-301-1 of the slot, welding end four 1-303-2 is connected to the inner four 1-301-2 of the slot, welding end three 1-303-1 and welding end four 1-303-2 are extended along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2, in this embodiment Y is a full pitch, the full pitch The pitch is preferably 6, and the extension directions of the welding end three 1-303-1 and the welding end four 1-303-2 extend in the same circumferential direction of the stator core 20; the welding end three 1-303-1 and the welding end four 1-303-2 are all located in the same layer as the slot interior three 1-301-1 and the slot interior four 1-301-2, that is, the 36 conductors three 210 of the coil group three 110 are located in the 72 slots of the first layer on the radial inner side of the stator core 20.

[0138] like Figure 6 As shown, the coil assembly 120 includes a plurality of conductors 220. In this embodiment, the coil assembly 120 includes 72 conductors 220. Figure 6As shown, the conductor 220 includes a welding end portion 2-303-1, a slot interior portion 2-301-1, a wire end portion 2-302, a slot interior portion 2-301-2, and a welding end portion 2-303-2 connected in sequence to form a U-shaped conductor 220. The slot interior portion 2-301-1 and the slot interior portion 2-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, the slot interior portion 2-301-1 and the slot interior portion 2-303-2 are connected in sequence to form a U-shaped conductor 220. The inner two 2-301-2 are respectively located in the second and third layers of the radial direction of the stator core 20, and the interval between the slot inner one 2-301-1 and the slot inner two 2-301-2 is Y, Y is the full pitch, and the full pitch is preferably 6; the plug-in end 2-302 is located outside one axial end of the stator core 20, and the plug-in end 2-302 is respectively connected to the slot inner one 2-301-1 and the slot inner two 2-301-2; the welding end one 2-303-1 is connected to The second welding end portion 2-303-2 is located outside the other axial end of the stator core 20, the first welding end portion 2-303-1 is connected to the inner portion 2-301-1 of the slot, the second welding end portion 2-303-2 is connected to the inner portion 2-301-2 of the slot, and the first welding end portion 2-303-1 and the second welding end portion 2-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, which is preferably 6, and the welding end portion The end portion 1 2-303-1 and the welding end portion 2-303-2 extend in opposite directions and are far away from each other; the welding end portion 1 2-303-1 and the slot interior 1 2-301-1 are located in one of the two adjacent layers of the stator core 20, such as the second layer, and the welding end portion 2-303-2 and the slot interior 2-301-2 are located in the other layer, such as the third layer, that is, the 72 conductors 220 of the coil group 120 are located in the 72 slots of the second and third layers on the radial inner side of the stator core 20.

[0139] like Figure 15 、 16 As shown in Figures 18, the coil group 2 130 includes a plurality of conductor groups 230', and in this embodiment, includes 36 conductor groups 230'. The conductor group 230' includes a first conductor 230A and a second conductor 230B. The first conductor 230A is arranged outside the second conductor 230B. The first conductor 230A surrounds the second conductor 230B. The first conductor 230A and the second conductor 230B have similar structures and are coaxially arranged.

[0140] like Figure 15As shown, the conductor 1 230A includes a welding end 1 3A-303-1, a slot interior 1 3A-301-1, a wire end 3A-302, a slot interior 2 3A-301-2, and a welding end 2 3A-303-2 connected in sequence to form a U-shaped conductor 1 230A. The slot interior 1 3A-301-1 and the slot interior 2 3A-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 3A-301-1 and the slot interior 2 3A-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the slot interior 3A-301-1 and the slot interior 2 3A-301-2 are separated by a pitch of Z, Z is a long pitch, and the long pitch is preferably 7; the wire end portion 3A-302 is located outside one axial end of the stator core 20, and the wire end portion 3A-302 is respectively separated from the slot interior 3A-301-1 and the slot interior 2 3A-301-2 connection; welding end 1 3A-303-1 and welding end 2 3A-303-2 are located outside the other axial end of the stator core 20, welding end 1 3A-303-1 is connected to the slot inside 1 3A-301-1, welding end 2 3A-303-2 is connected to the slot inside 2 3A-301-2, welding end 1 3A-303-1 and welding end 2 3A-303-2 are extended along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is preferably 6, and the welding end 1 3A-303-1 and the welding end 2 3A-303-2 extend in opposite directions and are close to each other; the welding end 1 3A-303-1 and the slot interior 1 3A-301-1 are located in one of the two adjacent layers of the stator core 20, such as the fourth layer, and the welding end 2 3A-303-2 and the slot interior 2 3A-301-2 are located in another layer, such as the fifth layer.

[0141] like Figure 16As shown, the conductor 230B includes a welding end 3B-303-1, a slot interior 3B-301-1, a wire end 3B-302, a slot interior 3B-301-2, and a welding end 3B-303-2 connected in sequence to form a U-shaped conductor 230B. The slot interior 3B-301-1 and the slot interior 3B-301-2 are located in two slots 21 of two radially adjacent layers of the stator core 20 separated by a specified slot distance. In this embodiment, , the slot interior 3B-301-1 and the slot interior 2 3B-301-2 are respectively located at the fourth and fifth layers in the radial direction of the stator core 20, and the slot interior 3B-301-1 and the slot interior 2 3B-301-2 are separated by a pitch of X, X is a short pitch, and the short pitch is preferably 5; the wire end 3B-302 is located outside one end of the stator core 20, and the wire end 3B-302 is respectively separated from the slot interior 3B-301-1 and the slot interior 3B-301-2 The first welding end 3B-303-1 and the second welding end 3B-303-2 are located outside the other axial end of the stator core 20, the first welding end 3B-303-1 is connected to the first 3B-301-1 inside the slot, the second welding end 3B-303-2 is connected to the second 3B-301-2 inside the slot, and the first welding end 3B-303-1 and the second welding end 3B-303-2 are along the circumferential direction of the stator core 20. The specified slot pitch is extended to Y / 2. In this embodiment, Y is the full pitch, which is 6, and the welding end 1 3B-303-1 and the welding end 2 3B-303-2 extend in opposite directions and are close to each other; the welding end 1 3B-303-1 and the slot inside 1 3B-301-1 are located in one of the two adjacent layers of the stator core 20, such as the fourth layer, and the welding end 2 3B-303-2 and the slot inside 2 3B-301-2 are located in another layer, such as the fifth layer.

[0142] like Figure 18 As shown, the conductor 1 230A surrounds the conductor 2 230B. In this embodiment, the slot interior 1 3A-301-1 and the slot interior 2 3A-301-2 of the conductor 1 230A are respectively located in the first slot and the eighth slot of the stator core 20, and the slot interior 1 3B-301-1 and the slot interior 2 3B-301-2 of the conductor 2 230B are respectively located in the second slot and the seventh slot of the stator core 20. Figure 18 As shown, conductor one 230A surrounds conductor two 230B, and the 36 conductor groups 230 ′ of coil group one are located in the 72 slots of the fourth and fifth layers on the radial inner side of the stator core 20 .

[0143] Figure 8 As shown, the coil group 140 includes a plurality of conductors 240. In this embodiment, the coil group 140 includes 36 conductors 240. Figure 5As shown, the conductor four 240 includes a welding end five 4-303-1, a slot interior five 4-301-1, a wire end 4-302, a slot interior six 4-301-2, and a welding end six 4-303-2 connected in sequence to form a U-shaped conductor four 240. The slot interior five 4-301-1 and the slot interior six 4-301-2 are located in two slots 21 of the same radial layer of the stator core 20 and separated by a specified slot distance. In this embodiment, the slot interior five 4-301-1 and the slot interior six 4-301-2 are both Located at the sixth layer in the radial direction of the stator core 20, the pitch between the inner slot five 4-301-1 and the inner slot six 4-301-2 is Y, Y is the full pitch, and the short pitch is preferably 6; the plug-in wire end 4-302 is located outside one axial end of the stator core 20, and the plug-in wire end 4-302 is connected to the inner slot five 4-301-1 and the inner slot six 4-301-2 respectively; the welding end five 4-303-1 and the welding end six 4-303-2 are located outside the other axial end of the stator core 20, The welding end 5 4-303-1 is connected to the inner part of the slot 5 4-301-1, and the welding end 6 4-303-2 is connected to the inner part of the slot 6 4-301-2. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend along the circumferential direction of the stator core 20 by a prescribed slot pitch Y / 2. In this embodiment, Y is a full pitch, and the full pitch is preferably 6. The welding end 5 4-303-1 and the welding end 6 4-303-2 extend in the same direction, and the welding end 5 4-303-1 The extension direction is opposite to that of the welding end six 4-303-2, that is, the welding end in the coil group three 110 and the welding end in the coil group four 140 extend in the circumferential direction of the stator core 20 in the opposite direction; the welding end five 4-303-1 and the welding end six 4-303-2 are located in the same layer as the slot inside five 4-301-1 and the slot inside six 4-301-2, such as the sixth layer, that is, the 36 conductors four 240 of the coil group four 140 are located in the 72 slots of the sixth layer on the radial inner side of the stator core 20.

[0144] Example 5

[0145] Compared with the above-mentioned embodiment 1, embodiment 2, embodiment 3, and embodiment 4, the structures of the coil group 1 120, coil group 2 130, and coil group 4 140 of this embodiment are the same as those of the above-mentioned embodiment 1, embodiment 2, embodiment 3, and embodiment 4, and are not described in detail here. The difference is that, as shown in FIG. Figure 24 、 25As shown, the structure of the coil group three 110 is different. In this embodiment, the structure of the coil group three 110 is different from the structure of the coil group three 110 in the above-mentioned embodiments one, two, three, and four in that the pitch between the slot inner three 1-301-1 and the slot inner four 1-301-2 of the conductor three of the coil group three 110 is different. In this embodiment, the pitch between the slot inner three 1-301-1 and the slot inner four 1-301-2 of the conductor three of the coil group three 110 is Z, where Z is the long pitch, and the long pitch is preferably 7.

[0146] Example 6

[0147] Compared with the above five embodiments, the structures of coil group 1 120, coil group 2 130, coil group 3 110 and coil group 4 140 in this embodiment are the same. The difference is that in this embodiment, the number of coil group 1 120 is two, and the number of coil group 2 130 is two.

[0148] Due to the adoption of the above technical solution, there are at least one coil group one and at least one coil group two, and the coil group one and the coil group two are arranged on the stator core, and the coil group one and the coil group two are both arranged on two adjacent layers of the stator core. At the same time, the coil group one is composed of a plurality of conductors or conductor groups of the same structure stacked together, and the coil group two is composed of a plurality of conductors or conductor groups of the same structure stacked together, and the structure of the conductors or conductor groups of the coil group one is similar to that of the conductors or conductor groups of the coil group two. The types of conductors used are small, the arrangement method is simple, and busbars and busbars are eliminated. The welding end of the coil group one and the welding end of the coil group two extend in opposite directions, and the stacking rotation direction of the coil group one and the coil group two is opposite, so that the twisting direction and twisting slot pitch of the welding end extending inside the slot of the same radial layer in the stator core slot 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.

[0149] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A motor stator winding, characterized in that: include, At least one coil group 1, arranged in two radially adjacent layers of the stator core; At least one coil group 2, arranged in two radially adjacent layers of the stator core; A coil group three, wherein the coil group three is arranged in the first radial inner layer or the first radial outer layer of the stator core; A coil group four, the coil group four being arranged in a first layer in the stator core which is radially opposite to the coil group three; Wherein, the lap-winding rotation direction of the coil group 1 is opposite to the lap-winding rotation direction of the coil group 2; The coil group one and the coil group two both include multiple conductors or multiple conductor groups, and the multiple conductors or multiple conductor groups are arranged in sequence along the circumference of the stator core. The overlapping and rotating direction of the multiple conductors or multiple conductor groups of the coil group one is opposite to the overlapping and rotating direction of the multiple conductors or multiple conductor groups of the coil group two.

2. The motor stator winding according to claim 1, characterized in that: The conductor group includes a first conductor and a second conductor, and the first conductor is arranged outside the second conductor.

3. The motor stator winding according to claim 2, characterized in that: The conductor, the conductor 1 and the conductor 2 all include a conductor body, a welding end 1 and a welding end 2, the welding end 1 and the welding end 2 are both connected to the conductor body, and the welding end 1 and the welding end 2 extend along the circumferential direction of the stator core, and the extension directions of the welding end 1 and the welding end 2 are opposite directions or opposite directions; wherein, The conductor body includes a wire insertion end, a slot interior 1 and a slot interior 2, one end of the slot interior 1 and one end of the slot interior 2 are both connected to the wire insertion end, the slot interior 1 and the slot interior 2 are respectively arranged in two radially adjacent layers of the stator core, and the span between the slot interior 1 and the slot interior 2 is a full pitch, a long pitch or a short pitch.

4. The motor stator winding according to claim 3, characterized in that: The extension direction of the welding end 1 of the conductor or conductor group of the coil group 1 is opposite to that of the welding end 1 of the conductor or conductor group of the coil group 2; the sum of the extension spans of the two welded welding ends 1 and 2 is the full pitch; During the overlapping winding rotation, the wire insertion end of the coil group 1 rotates in the opposite direction to the wire insertion end of the coil group 2.

5. The motor stator winding according to claim 4, characterized in that: The span between the first slot and the second slot of the conductor is a full span; The span between the inside of slot 1 and the inside of slot 2 of conductor 1 is a long pitch, and the span between the inside of slot 1 and the inside of slot 2 of conductor 2 is a short pitch; or, the span between the inside of slot 1 and the inside of slot 2 of conductor 1 is a short pitch, and the span between the inside of slot 1 and the inside of slot 2 of conductor 2 is a long pitch.

6. The motor stator winding according to any one of claims 3 to 5, characterized in that: The coil group three includes a plurality of conductors three, and the plurality of conductors three are arranged in sequence along the circumferential side of the stator core; wherein the conductor three includes a welding end portion three and a welding end portion four, and the welding end portion three and the welding end portion four both extend along the circumferential direction of the stator core, and the sum of the extension spans of the two welded welding end portions three and the welding end portion one or the welding end portion two is a whole pitch, or the sum of the extension spans of the two welded welding end portions four and the welding end portion one or the welding end portion one is a whole pitch, and the welding end portion three and the welding end portion four have the same extension direction; The conductor three also includes a slot inner three and a slot inner four, wherein the slot inner three and the slot inner four are both arranged at the same radial layer of the stator core, and the span between the slot inner three and the slot inner four is a short pitch or a long pitch.

7. The motor stator winding according to claim 6, characterized in that: The coil group four includes a plurality of conductors four, and the plurality of conductors four are arranged in sequence along the circumferential side of the stator core; wherein the conductor four includes a welding end portion five and a welding end portion six, and the welding end portion five and the welding end portion six both extend along the circumferential direction of the stator core, and the sum of the extension spans of the two welded welding ends five and the welding end portion one or the welding end portion two is a whole pitch, or the sum of the extension spans of the two welded welding ends six and the welding end portion one or the welding end portion two is a whole pitch, and the welding end portion five and the welding end portion six have the same extension direction; The conductor four also includes a slot interior five and a slot interior six, wherein the slot interior five and the slot interior six are both arranged at the same radial layer of the stator core, and the span between the slot interior five and the slot interior six is ​​a full pitch.

8. The motor stator winding according to any one of claims 1 to 5 and 7, characterized in that: The number of radial layers of the stator core is an even number of layers greater than or equal to 6.

9. A motor stator, characterized in that: It comprises a stator core and a motor stator winding as claimed in any one of claims 1 to 8, wherein the stator winding is arranged on the stator core.

10. A motor, characterized in that: Comprising the motor stator as claimed in claim 9.

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