Motor stator and motor

Abstract

The present invention relates to the field of motors and discloses a motor stator and a motor, comprising a stator core having a plurality of slots formed on a radially inner surface of the stator core and spaced apart at a predetermined slot pitch along the circumferential direction of the stator core; a stator winding having two slots per pole and per phase, the stator winding comprising a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; three branch windings in each phase winding being sequentially connected in parallel along the circumference of the stator core; each branch winding comprising: a first conductor group, a plurality of second conductor groups, a plurality of third conductor groups, and a fourth conductor group; and a completely symmetrical structure being adopted in the magnetic circuit of the winding structure, thereby eliminating the problem of loop current caused by the asymmetrical structure, reducing torque fluctuation and noise, simplifying the manufacturing process, reducing production costs, and improving processing efficiency.

Description

Technical Field

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

[0002] In the prior art, stator windings include multiple types of conductors, including U-shaped and S-shaped conductors. These conductors are inserted into the slots of the stator core in a specific arrangement to form the windings of a multi-phase motor. Each phase of a current stator winding consists of multiple branches connected in parallel or in series. For a phase winding with three branches in parallel, the stator winding typically requires three slots per pole and phase. For a phase winding with two or four branches connected in series, the stator winding typically requires two slots per pole and phase.

[0003] Furthermore, the stator windings used in the prior art have complex manufacturing processes, high production costs, and low processing efficiency. Furthermore, the magnetic circuit of the current stator windings has a loop current problem, which increases torque fluctuations and produces high noise. Summary of the Invention

[0004] The present invention provides a motor stator and a motor, which adopt a completely symmetrical structure in the magnetic circuit through the winding structure, eliminate the loop current problem caused by the asymmetrical structure, reduce torque fluctuation, reduce noise, simplify the manufacturing process, reduce production costs, and improve processing efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A motor stator includes: a stator core having a plurality of slots formed on a radially inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core;

[0007] a stator winding, wherein the number of slots per pole and per phase of the stator winding is 2, and the stator winding includes a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase;

[0008] Each phase winding consists of three branches connected in parallel in sequence along the circumference of the stator core;

[0009] At least one branch winding of the three-branch winding of each phase winding includes: one first conductor group, multiple second conductor groups, multiple third conductor groups, and one fourth conductor group, or at least one branch winding of the three-branch winding of each phase winding includes: multiple second conductor groups, multiple third conductor groups, and one fourth conductor group, or at least one branch winding of the three-branch winding of each phase winding includes: one first conductor group, multiple second conductor groups, and multiple third conductor groups;

[0010] According to the number of slots that each slot can accommodate along the radial direction of the stator core, each slot is divided into M layers distributed along the radial direction, where M is an even number greater than or equal to 6.

[0011] The first conductor group of each branch winding is located at the Mth radial layer of the stator core, and the fourth conductor group of the branch winding is located at the first radial layer of the stator core;

[0012] Each conductor group includes a plurality of conductors, and each conductor of the conductor group includes: two welding ends located in two slots of the stator core separated by a predetermined slot pitch, located in two slots connected to the conductor at the second axial end of the stator core, and a plug-in end located in two slots connected to the conductor at the first axial end of the stator core;

[0013] The welding end connected to the lead wire of each branch winding of each phase winding is located at the first axial end of the stator core;

[0014] The second conductor set includes: a second large conductor and a second small conductor, or the second conductor set includes: two identical sixth conductors;

[0015] The pitch between the two slots of the second largest conductor of the second conductor group is a long pitch, and the pitch between the two slots of the second smallest conductor of the second conductor group is a full pitch;

[0016] or the pitch between the two slots of the second largest conductor of the second conductor group is a full pitch, and the pitch between the two slots of the second smallest conductor of the second conductor group is a short pitch;

[0017] or the pitch between the insides of the two slots of the sixth conductor of the second conductor group is a long pitch;

[0018] Or the pitch between the two slots of the sixth conductor of the second conductor group is a short pitch.

[0019] Furthermore, the welding end connected to the lead wire of at least one branch winding of each phase winding is located at two adjacent radial layers of the stator core, and the welding end connected to the lead wire of at least one branch winding is located at the Nth and N+1th layers in the radial direction of the stator core, or the welding end connected to the lead wire of at least one branch winding is located at the N+1 and N+2th layers in the radial direction of the stator core, where N is an odd number.

[0020] Furthermore, the welding end connected to the lead wire of at least one branch winding of each phase winding is located in the Mth layer or the first layer of the same radial layer of the stator core.

[0021] Furthermore, one of the branch windings of each phase winding also includes a conductor of a first conductor group, or one of the branch windings of each phase winding also includes a conductor of a second conductor group, or one of the branch windings of each phase winding also includes a conductor of a third conductor group, or one of the branch windings of each phase winding also includes a conductor of a fourth conductor group.

[0022] Furthermore, the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each phase winding and the interior of two slots of a conductor of a second conductor group are located within two circumferentially adjacent slots of the stator core; and / or the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each phase winding and the interior of two slots of a conductor of a third conductor group are located within two circumferentially adjacent slots of the stator core.

[0023] Furthermore, the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each phase winding and the interior of two slots of a conductor of a first conductor group are located within two circumferentially adjacent slots of the stator core; and / or the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each phase winding and the interior of two slots of a conductor of a fourth conductor group are located within two circumferentially adjacent slots of the stator core.

[0024] Furthermore, the first conductor group includes two first conductors, and the pitch between the two slots of each first conductor is a full pitch; the fourth conductor group includes a fourth large conductor and a fourth small conductor, the pitch between the two slots of the fourth large conductor is a long pitch, and the pitch between the two slots of the fourth small conductor is a short pitch.

[0025] Furthermore, the two slots of each conductor of the second conductor group are respectively located in the radially adjacent Nth layer and N+1th layer of the stator core, where N is an odd number;

[0026] The third conductor group includes two conductors. The two slots of each conductor of the third conductor group are respectively located in the radially adjacent N+1 layer and N+2 layer of the stator core.

[0027] Furthermore, the phase winding has a plurality of first connection welding ends and a plurality of second connection welding ends connected together, the welding ends of the M-1th layer located in the same radially adjacent manner at the second axial end of the stator core are the first connection welding ends, and the welding ends of the Mth layer located in the same radially adjacent manner at the second axial end of the stator core are the second connection welding ends, where M is an even number.

[0028] Further, when the pitch between the two slots of the second large conductor of the second conductor group is a long pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a full pitch; the two conductors of the third conductor group are the same third conductors, and the pitch between the two slots of the third conductor is a long pitch, and / or the two conductors of each third conductor group of the phase winding are the fifth large conductor and the fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a full pitch; the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

[0029] Further, when the pitch between the two slots of the second large conductor of the second conductor group is a full pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductors, the pitch between the two slots of the third conductor is a short pitch, and / or the two conductors of each third conductor group of the phase winding are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch, the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

[0030] Furthermore, when the pitch between the two slots of the sixth conductor of the second conductor group is a long pitch; the two conductors of the third conductor group are the same third conductors, the pitch between the two slots of the third conductor is a long pitch, and / or the two conductors of the third conductor group are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a full pitch; the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

[0031] Further, when the pitch between the two slots of the sixth conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a short pitch, and / or the two conductors of the third conductor group are the fifth large conductor and the fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch. The present invention also provides a motor, including the above-mentioned motor stator.

[0032] The technical solution of the present invention is applied to a motor stator, comprising: a stator core, the stator core having a plurality of slots, the plurality of slots being formed on the radial inner surface of the stator core and spaced apart at a predetermined slot pitch along the circumferential direction of the stator core; a stator winding, the number of slots per pole and per phase of the stator winding being two, the stator winding comprising a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; each phase winding being a three-branch winding connected in parallel in sequence along the circumference of the stator core; at least one branch winding of the three-branch winding of each phase winding comprising: 1 The stator core comprises a plurality of first conductor groups, a plurality of second conductor groups, a plurality of third conductor groups, and a fourth conductor group, or at least one branch winding of the three-branch winding of each phase winding comprises a plurality of second conductor groups, a plurality of third conductor groups, and a fourth conductor group, or at least one branch winding of the three-branch winding of each phase winding comprises a first conductor group, a plurality of second conductor groups, and a plurality of third conductor groups; each slot is divided into M layers distributed in the radial direction according to the number of slot interiors that each slot can accommodate in the radial direction of the stator core, where M is an even number greater than or equal to 6. The first conductor group of each branch winding is located at the Mth radial layer of the stator core, and the fourth conductor group of the branch winding is located at the first radial layer of the stator core; each conductor group includes multiple conductors, and the conductors of each conductor group include: two welding ends located inside two slots of the stator core separated by a specified slot pitch, located inside two slots connected to the conductor at the second axial end of the stator core, and a plug-in end located inside two slots connected to the conductor at the first axial end of the stator core; the welding end connected to the lead-out wire of each branch winding of each phase winding is located at the first axial end of the stator core; the second conductor group includes: a second large conductor The body and the second small conductor, or the second conductor group includes: two identical sixth conductors; the pitch between the two slots of the second large conductor of the second conductor group is a long pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a full pitch; or the pitch between the two slots of the second large conductor of the second conductor group is a full pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a short pitch; or the pitch between the two slots of the sixth conductor of the second conductor group is a long pitch; or the pitch between the two slots of the sixth conductor of the second conductor group is a short pitch. By using multiple conductor groups and connecting conductors in parallel, the winding structure adopts a completely symmetrical structure in the magnetic circuit, eliminating the loop current problem caused by the asymmetric structure, reducing torque fluctuation and noise. The use of a single U-shaped conductor simplifies the manufacturing process, reduces production costs, and improves processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0034] Figure 1 1 is a schematic structural diagram of a motor stator provided in Embodiment 1 of the present invention;

[0035] Figure 2 1 is a schematic structural diagram of a phase winding provided by the first embodiment of the present invention;

[0036] Figure 3 is a structural diagram of a fourth conductor group provided in the first embodiment of the present invention;

[0037] Figure 4 is a schematic structural diagram of the conductors of the first conductor group provided in the first embodiment of the present invention;

[0038] Figure 5 is a schematic structural diagram of the conductors of the second conductor group provided in the first embodiment of the present invention;

[0039] Figure 6 is a schematic structural diagram of the conductors of the third conductor group provided in the first embodiment of the present invention;

[0040] Figure 7 is a structural diagram of a third conductor group provided in the second embodiment of the present invention;

[0041] Figure 8 is a structural diagram of a second conductor group provided by a fourth embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the first embodiment of the present invention;

[0043] Figure 10 This is a schematic planar distribution diagram of the plug-in terminals of a phase winding provided by the second embodiment of the present invention;

[0044] Figure 11 This is a schematic planar distribution diagram of the plug-in terminals of a phase winding provided by the third embodiment of the present invention;

[0045] Figure 12 Schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the fourth embodiment of the present invention;

[0046] Figure 13 This is a schematic planar distribution diagram of the plug-in terminals of a phase winding provided by the fifth embodiment of the present invention;

[0047] Figure 14 Schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the sixth embodiment of the present invention;

[0048] Figure 15 Schematic diagram of the planar distribution of the welding ends of a phase winding provided by the first to sixth embodiments of the present invention;

[0049] Figure 16 Schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the seventh embodiment of the present invention;

[0050] Figure 17 Schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the eighth embodiment of the present invention;

[0051] Figure 18 Schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the ninth embodiment of the present invention;

[0052] Figure 19 1 is a schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the tenth embodiment of the present invention;

[0053] Figure 20 1 is a schematic diagram of the planar distribution of the plug-in terminals of a phase winding provided by the eleventh embodiment of the present invention;

[0054] Figure 21 1 is a schematic planar distribution diagram of the plug-in terminals of a phase winding provided by the twelfth embodiment of the present invention;

[0055] Figure 22 Schematic diagram of the planar distribution of the welding ends of a phase winding provided by the seventh to twelfth embodiments of the present invention;

[0056] Figure 23 1 is a schematic diagram of the planar distribution of a phase winding provided by the thirteenth embodiment of the present invention;

[0057] Figure 24 Schematic diagram of the planar distribution of a phase winding provided by the fourteenth embodiment of the present invention;

[0058] Figure 25 Schematic diagram of three phase windings connected in a star configuration according to the first embodiment of the present invention;

[0059] Figure 26 Schematic diagram of three phase windings connected in a delta manner provided by the first embodiment of the present invention; DETAILED DESCRIPTION

[0060] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0061] It should be noted that the terms "first," "second," and so on, in the specification, claims, and drawings of the present invention are used to distinguish different objects, and are not intended to limit a specific order. The following embodiments of the present invention may be implemented independently or in combination with each other, and the present invention does not impose specific limitations on this.

[0062] In the present application, the pitch is the circumferential spacing between two slot interiors 301 of the same conductor, or the pitch is the sum of the span between the slot interiors 301 corresponding to one welding end of one conductor and the span between the slot interiors 301 corresponding to one welding end of another conductor; it should be noted that in the present application, the radially inner first layer of the stator core can be the inner first layer away from the center of the stator core in the axial direction, or the inner first layer close to the center of the stator core in the axial direction.

[0063] like Figure 1 As shown, an embodiment of the present invention provides a motor stator, comprising: a stator core 20, wherein the stator core 20 has a plurality of slots 21 formed on a radial inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core;

[0064] like Figures 1 to 2 、 Figures 9 to 24 As shown, the stator winding 10 includes multiple phase windings mounted on a stator core 20 so as to differ in electrical phase. The windings are arranged in an even number of layers in the radial direction of the stator core 20. In this embodiment, the phase windings (U-phase winding, V-phase winding, or W-phase winding) are divided into six radially distributed layers based on the number of slots each slot can accommodate along the radial direction of the stator core. It should be noted that the even number of layers mentioned above can be six, eight, or more. The motor stator in this embodiment is a stator in a hairpin motor.

[0065] Combine Figures 1 to 26In the first to fourteenth embodiments, the stator winding 10 is mounted on the stator core 20, i.e., multiple phase windings are mounted on the stator core 20 so as to differ from each other in electrical phase. The stator winding 10 is a three-phase winding (i.e., a U-phase winding, a V-phase winding, and a W-phase winding), and the number of slots per pole per phase is equal to 2. Each magnetic pole of the rotor is provided with two slots 21. In this embodiment, the number of slots per pole per phase is 2. The rotor has twelve magnetic poles, and this is the case for each phase of the three-phase stator winding 10. The number of slots 21 provided in the stator core 20 is equal to 72 (i.e., 2×12×3). The number of slots per pole per phase is two, so the pole pitch = 2×3 = 6, i.e., the pole pitch of the stator winding is six. The number of slots per pole per phase = the total number of stator slots / (number of magnetic poles × number of phases). The total number of stator slots is 72, the number of magnetic poles is equal to twelve, and the number of phases is three. It should be noted that the number of magnetic poles of the stator winding is not limited to 12. It only needs to satisfy that the corresponding number of magnetic poles is an even number greater than 6 and divisible by 3. The corresponding number of poles is an even number greater than 6 and divisible by 3, which can be 12, 18, 24, etc. Each phase winding of the stator winding is a 3-branch winding connected in parallel along the circumference of the stator core.

[0066] In addition, in this embodiment, the stator core 20 is defined by two adjacent slots 21 to form a tooth portion 22. The stator core 20 is formed by stacking a plurality of annular magnetic steel plates to form two end faces 25 and 26 in the stator core axial direction. Other traditional metal plates can also be used instead of magnetic steel plates.

[0067] Combine Figure 9 In the first embodiment, the first branch winding of the three parallel branch windings of each phase winding includes one first conductor group, five second conductor groups, four third conductor groups, and one fourth conductor group. The second branch winding of the three parallel branch windings of the phase winding includes one first conductor group, five second conductor groups, four third conductor groups, and one fourth conductor group. The third branch winding of the three parallel branch windings of the phase winding includes one first conductor group, five second conductor groups, four third conductor groups, and one fourth conductor group. That is, at least one branch winding of the three parallel branch windings of the phase winding includes one first conductor group, multiple second conductor groups, multiple third conductor groups, and one fourth conductor group. Figure 23 In the thirteenth embodiment, the first branch winding of the three parallel branch windings of each phase winding includes one first conductor group, six second conductor groups, three third conductor groups, and one fourth conductor group, and the third branch winding of the three parallel branch windings of each phase winding includes one first conductor group, six second conductor groups, four third conductor groups, and zero fourth conductor groups. That is, at least one branch winding of the three parallel branch windings of the phase winding includes one first conductor group, multiple second conductor groups, and multiple third conductor groups. Accordingly, in combination Figure 24In the fourteenth embodiment, the third branch winding of the three parallel branch windings of each phase winding includes 0 first conductor groups, 6 second conductor groups, 4 third conductor groups, and 1 fourth conductor group. That is, at least one branch winding of the three parallel branch windings of the phase winding includes multiple second conductor groups, multiple third conductor groups, and 1 fourth conductor group. Figure 3 、 Figure 4 、 Figures 9 to 24 As shown, in the first to fourteenth embodiments, the first conductor group of each branch winding is located at the sixth radial layer of the stator core, and the fourth conductor group of the branch winding is located at the first radial layer of the stator core;

[0068] Combine Figures 3 to 8 In the embodiment, the first conductor group includes: two identical first conductors 150, each first conductor 150 includes two slot interiors 301 located in the same radial layer of the stator core and separated by a specified slot pitch, two welding ends 303 located at the second axial end 25 of the stator core and connected to the two slot interiors 301 of the conductor, and a plug-in end 302 located at the first axial end 26 of the stator core and connected to the two slot interiors 301 of the conductor; two welding ends 303 located outside the slot and extending in the same direction (both to the left), the two welding ends 303 located at the axial outer end 25 of the slot 21 and connected to the two slot interiors 301 of the conductor in the same layer, the two slot interiors of the first conductor are located in the sixth radial innermost layer of the stator core, that is, the first conductor group is located in the Mth radial layer of the stator core (M is 6 in this embodiment).

[0069] In the embodiment, the fourth conductor group includes: a fourth large conductor 100A and a fourth small conductor 100B. Each conductor in the fourth large conductor 100A and the fourth small conductor 100B of the fourth conductor group includes two slot interiors 301 located in the same radial layer of the stator core and separated by a specified slot pitch, two welding ends 303 located at the second axial end 25 of the stator core and connected to the two slot interiors 301 of the conductor, and a plug-in end 302 located at the first axial end 26 of the stator core and connected to the two slot interiors 301 of the conductor; two welding ends 303 located outside the slot and extending in the same direction (both to the right), the two welding ends 303 located at the axial outer end 25 of the slot 21 and respectively connected to the two slot interiors 301 of the conductor in the same layer. The two slot interiors of each conductor of the fourth conductor group are located in the first layer of the radially innermost layer of the stator core.

[0070] In Examples 1 to 3 and Examples 7 to 9, the second conductor group includes: two identical sixth conductors 350, each sixth conductor 350 includes two slot interiors 301 located in two radially adjacent layers of the stator core with a specified slot distance apart, two welding ends 303 located at the second axial end 25 of the stator core and connected to the two slot interiors 301 of the conductor, and a wire end 302 located at the first axial end 26 of the stator core and connected to the two slot interiors 301 of the conductor; two welding ends 303 located outside the slot and extending in opposite directions (the two welding ends extend in opposite directions), and the two welding ends 303 are located at the axial outer side 25 of the slot 21 and connected to the two slot interiors 301 of the conductor in the same layer.

[0071] In Examples 4 to 6 and Examples 10 to 12, the second conductor group includes: a second large conductor 300A and a second small conductor 300B. Each conductor in the second large conductor 300A and the second small conductor 300B of the second conductor group includes two slot interiors 301 located in two radially adjacent layers of the stator core with a specified slot distance apart, two welding ends 303 located at the second axial end 25 of the stator core and connected to the two slot interiors 301 of the conductor, and a wire end 302 located at the first axial end 26 of the stator core and connected to the two slot interiors 301 of the conductor; two welding ends 303 located outside the slot and extending in opposite directions (the two welding ends extend in opposite directions), and the two welding ends 303 are located at the axial outer end 25 of the slot 21 and connected to the two slot interiors 301 of the conductor in the same layer.

[0072] In an embodiment, the third conductor group includes: two conductors, each conductor includes two slot interiors 301 located in two radially adjacent layers of the stator core with a specified slot distance apart, two welding ends 303 located at the second axial end 25 of the stator core and connected to the two slot interiors 301 of the conductor, and a wire end 302 located at the first axial end 26 of the stator core and connected to the two slot interiors 301 of the conductor; two welding ends 303 located outside the slot and extending in opposite directions (the extension directions of the two welding ends are opposite), and the two welding ends 303 are located at the axial outer 25 ends of the slot 21 and connected to the two slot interiors 301 of the conductor in the same layer.

[0073] Combine Figures 9 to 24 In the embodiment, the welding end 303 of the lead wires (U1, U2, U3, U4, U5, U6) of the three branch windings of each phase winding is located at the first axial end 26 of the stator core;

[0074] Combine Figure 5 、 Figures 9 to 11 、 Figures 22 to 24In Examples 1 to 3 and Examples 13 and 14, the second conductor group includes two identical second conductors 350. The two slots of the first second conductor 350 of the second conductor group are located in core slots 1 and 8, and the two slots of the second second conductor 350 of the second conductor group are located in core slots 2 and 9. Therefore, the pitch between the two slots of the two second conductors 350 of the second conductor group is a long pitch (in this embodiment, the long pitch is 7), and the two slots of the two second conductors 350 of the second conductor group are located in two circumferentially adjacent core slots of the stator core. By using multiple conductor groups and connecting conductors in parallel, the winding structure adopts a completely symmetrical structure in the magnetic circuit, eliminating the loop current problem caused by the asymmetric structure, reducing torque ripple and noise, simplifying the manufacturing process, reducing production costs, and improving processing efficiency.

[0075] Combine Figure 8 、 Figures 12 to 14 In Examples 4 through 6, the second conductor group includes two different conductors, namely, a second large conductor 300A and a second small conductor 300B. The slots of the second large conductor 300A are located in slots 1 and 9 of the stator core, while the slots of the second small conductor 300B are located in slots 2 and 8 of the stator core. Therefore, the pitch between the slots of the second large conductor 300A is a long pitch (in this embodiment, the long pitch is 8), while the pitch between the slots of the second small conductor 300B is a full pitch (in this embodiment, the full pitch is 6). Therefore, the slots of the second large conductor 300A surround the second small conductor 300B. By employing multiple conductor groups and connecting conductors in parallel, the winding structure achieves a completely symmetrical magnetic circuit, eliminating loop current issues caused by asymmetric structures, reducing torque ripple and noise, simplifying the manufacturing process, lowering production costs, and improving processing efficiency.

[0076] Combine Figure 5 、 Figures 16 to 18In Examples 7 through 9, the second conductor group includes two identical sixth conductors 350. The slots of the first sixth conductor 350 of the second conductor group are located in slots 2 and 7 of the stator core, while the slots of the second sixth conductor 350 of the second conductor group are located in slots 3 and 8 of the stator core. Therefore, the pitch between the slots of the two sixth conductors 350 of the second conductor group is a short pitch (in Examples 7 through 9, the pitch of the sixth conductors 350 is a short pitch of 5). The slots of the two sixth conductors 350 of the second conductor group are located in two circumferentially adjacent stator core slots. By employing multiple conductor groups and connecting conductors in parallel, the winding structure achieves a completely symmetrical magnetic circuit, eliminating loop current issues caused by asymmetric structures, reducing torque ripple and noise, simplifying the manufacturing process, lowering production costs, and improving processing efficiency.

[0077] Combine Figure 8 、 Figures 19 to 21 In Examples 10 to 12, the second conductor group includes: two different conductors, namely, a second large conductor 300A and a second small conductor 300B. The two slots of the second large conductor 300A of the second conductor group are located in the 2nd slot and the 8th slot of the stator core, and the two slots of the second small conductor 300B of the second conductor group are located in the 3rd slot and the 7th slot of the stator core. It can be seen that the pitch between the two slots of the second large conductor 300A of the second conductor group is a full pitch (the full pitch is 6 in this embodiment), and the pitch between the two slots of the second small conductor 300B of the second conductor group is a short pitch (the pitch of the second small conductor 300B of the second conductor group in Examples 10 to 12 is a short pitch 4). It can be seen that the two slots of the second large conductor 300A of the second conductor group surround the second small conductor 300B of the second conductor group. By adopting multiple conductor groups and connecting conductors in parallel, the winding structure adopts a completely symmetrical structure in the magnetic circuit, eliminating the loop current problem caused by the asymmetric structure, reducing torque fluctuations, reducing noise, simplifying the manufacturing process, reducing production costs, and improving processing efficiency.

[0078] Combine Figures 9 to 24In Examples 1 to 12, the welding end connected to the lead wire of each branch winding is located at two adjacent layers in the radial direction of the stator core and at the first circumferential end 26 of the stator core. The welding end connected to the lead wire end U1 of the first branch winding of each phase winding is located at the sixth radial layer of the stator core, and the welding end connected to the lead wire end U2 of the branch winding is located at the fifth radial layer of the stator core; the welding end connected to the lead wire end U3 of the second branch winding of the phase winding is located at the fourth radial layer of the stator core, and the welding end connected to the lead wire end U2 of the second branch winding of the phase winding is located at the fourth radial layer of the stator core. The welding end connected to the outlet terminal U4 is located at the third radial layer of the stator core; the welding end connected to the lead terminal U5 of the third branch winding of the phase winding is located at the second radial layer of the stator core, and the welding end connected to the outlet terminal U6 of the third branch winding of the phase winding is located at the first radial layer of the stator core; that is, the welding ends connected to the lead wires of the three branch windings are located at two adjacent radial layers of the stator core and at the first axial end 26 of the stator core. The welding ends connected to the lead wires of the three branch windings of the phase winding are all located at the Nth and N+1th radial layers of the stator core, that is, the welding ends connected to the lead wires of at least one branch winding in each phase winding are located at the Nth and N+1th radial layers of the stator core. It should be noted that in Examples 1 to 12, the welding ends of the lead wires of the three branch windings of each phase winding are all located in the same radial direction of the stator core, but the welding ends of the lead wires of the three branch windings of each phase winding may not be located in the same radial direction of the stator core, and the welding ends of the lead wires of the first branch winding of the three branch windings of the phase winding may not be located in the same radial direction of the stator core.

[0079] like Figure 23As shown, in the thirteenth embodiment, the welding end connected to the lead end U1 of the first branch winding of each phase winding is located at the sixth radial layer of the stator core, and the welding end connected to the outlet end U2 of the branch winding is located at the sixth radial layer of the stator core; the welding end connected to the lead end U3 of the second branch winding of the phase winding is located at the fourth radial layer of the stator core, and the welding end connected to the outlet end U4 of the branch winding is located at the fifth radial layer of the stator core; the welding end connected to the lead end U5 of the third branch winding of the phase winding is located at The welded end connected to the outlet terminal U6 of the branch winding is located in the second radial layer of the stator core; that is, the welded end connected to the lead wire of each branch winding is located at the first axial end 26 of the stator core. The welded ends connected to the lead wires of the second and third branch windings of the phase winding are both located in the N+1 and N+2 radial layers of the stator core. That is, the welded end connected to the lead wire of at least one branch winding in each phase winding is located in the N+1 and N+2 radial layers of the stator core. It should be noted that in Example 13, the lead wires of the three branch windings of the phase winding are all located in the same radial direction of the stator core. However, the lead wires of the three branch windings of each phase winding do not necessarily need to be located in the same radial direction of the stator core. Of course, the lead wire of the first of the three branch windings of the phase winding is not located in the same radial direction of the stator core as the lead wires of the other two branch windings of the phase winding. Furthermore, in Example thirteen, the welding ends connected to the lead wires of the first branch winding of the phase winding are all located at the sixth radial layer of the stator core, that is, the welding ends connected to the lead wires of at least one branch winding in each phase winding are located at the Mth layer of the same radial layer of the stator core.

[0080] like Figure 24As shown, in Example 14, the welding end connected to the lead end U1 of the first branch winding of each phase winding is located at the fourth radial layer of the stator core, and the welding end connected to the outlet end U2 of the branch winding is located at the fifth radial layer of the stator core; the welding end connected to the lead end U3 of the second branch winding of the phase winding is located at the second radial layer of the stator core, and the welding end connected to the outlet end U4 of the branch winding is located at the third radial layer of the stator core; the welding end connected to the lead end U5 of the third branch winding of the phase winding is located at The welded end connected to the outlet terminal U6 of the branch winding is located in the first radial layer of the stator core; that is, the welded end connected to the lead wire of each branch winding is located at the first axial end 26 of the stator core. The welded ends connected to the lead wires of the first and second branch windings of the phase winding are both located in the N+1 and N+2 radial layers of the stator core. That is, the welded end connected to the lead wire of at least one branch winding in each phase winding is located in the N+1 and N+2 radial layers of the stator core. It should be noted that in Example 14, the lead wires of the three branch windings of the phase winding are all located in the same radial direction of the stator core. However, the lead wires of the three branch windings of each phase winding do not necessarily need to be located in the same radial direction of the stator core. Of course, the lead wire of the first branch winding of the three branch windings of the phase winding is not located in the same radial direction of the stator core as the lead wires of the other two branch windings of the phase winding. Furthermore, in Example 14, the welding ends connected to the lead wires of the third branch winding of the phase winding are all located in the first layer of the same radial layer of the stator core, that is, the welding ends connected to the lead wires of at least one branch winding in each phase winding are located in the first radial layer of the stator core.

[0081] Each branch winding also includes two eighth conductors, each of which includes a slot interior 301 and two welded ends 303 located at the first axial end 26 and the second axial end 25 of the stator core and connected to the slot interior 301. The two welded ends located at the two axial ends of the stator core are located in the same radial layer as the slot interior. The lead end of each branch winding is connected to the welded end of the eighth conductor located at the first axial end 26 of the stator core, and the outlet end of the branch winding is connected to the welded end of another eighth conductor located at the first axial end 26 of the stator core.

[0082] Combine Figures 9 to 22In Examples 1 to 12, each branch winding further includes one conductor of the second conductor group. In Examples 1 to 3 and Examples 7 to 9, each branch winding includes one conductor of the second conductor group, which is the second conductor 350. In Examples 4 to 6 and Examples 10 to 12, each branch winding includes one conductor of the second conductor group, which is the sixth small conductor 300B. Of course, in Examples 4 to 6, each branch winding includes one conductor of the second conductor group, which can also be the sixth large conductor 300A. The welding end connected to the lead end of the first branch winding of each phase winding corresponds to the slot inside 301 located in the 19th slot of the sixth layer of the stator core and a conductor of the second conductor group located in the stator core. The interior of the 20th slot of the sixth layer of the sub-core is located within two adjacent slots in the circumferential direction of the stator core. The interior of the slot 301 corresponding to the welding end connected to the outlet end of the first branch winding of each phase winding is located within the 25th slot of the fifth layer of the stator core and the interior of the slot of the 26th slot of the fifth layer of the stator core, corresponding to a conductor of a second conductor group, is located within two adjacent slots in the circumferential direction of the stator core. That is, the interior of the slot corresponding to the welding end connected to the outlet end of the first branch winding and the interior of the two slots of a conductor of a second conductor are located within two adjacent slots in the circumferential direction of the stator core. Accordingly, in combination Figures 9 to 22 The inside of the slots corresponding to the welding ends of the lead wires of the second branch winding and the third branch winding of the phase winding and the inside of the two slots of a conductor of a second conductor group are located in two adjacent slots in the circumferential direction of the stator core.

[0083] Combine Figure 23 In the thirteenth embodiment, each branch winding further includes one conductor of a third conductor group, and each branch winding further includes a conductor of the third conductor group, which is a third conductor 250. In the second and fifth embodiments, the third conductor group includes a fifth small conductor 200B. Of course, the third conductor group included in the second and fifth embodiments may also be a fifth large conductor 200A. The slot 301 corresponding to the welding end connected to the lead end of the second branch winding of the phase winding is located in the 31st slot of the fourth layer of the stator core and is located in the 31st slot of the fourth layer of the stator core and a conductor of the third conductor group is located in The interior of the 32nd slot of the fourth radial layer of the stator core is located within two circumferentially adjacent slots of the stator core. The interior of the slot 301 corresponding to the welded end connected to the outlet end of the second branch winding of the phase winding is located within the 38th slot of the fifth layer of the stator core, and the interior of the slot of the 39th slot of the fifth layer of the stator core, where a conductor of a third conductor group is located, is located within two circumferentially adjacent slots of the stator core. That is, the interior of the slot corresponding to the welded end connected to the outlet end of the second branch winding and the interior of two slots of a conductor of a third conductor group are located within two circumferentially adjacent slots of the stator core.

[0084] Combine Figures 1 to 24In the thirteenth embodiment, each branch winding further includes one conductor of the first conductor group, and each branch winding further includes one conductor of the first conductor group as the first conductor 150, combined with Figure 23 The slot interior 301 corresponding to the welded end connected to the lead end of the first branch winding of the phase winding is located in the 31st slot of the sixth layer of the stator core, and the slot interior of a conductor of a first conductor group located in the 32nd slot of the sixth layer of the stator core is located within two circumferentially adjacent slots of the stator core. The slot interior 301 corresponding to the welded end connected to the lead end of the first branch winding of the phase winding is located in the 37th slot of the sixth layer of the stator core, and the slot interior of a conductor of a first conductor group located in the 38th slot of the sixth layer of the stator core is located within two circumferentially adjacent slots of the stator core. That is, the slot interior corresponding to the welded end connected to the lead end of the first branch winding and the two slot interiors of a conductor of a first conductor group are located within two circumferentially adjacent slots of the stator core.

[0085] Combine Figures 1 to 24 In the fourteenth embodiment, each branch winding further includes a fourth conductor group, one of which is a fourth small conductor 100B. Figure 24 The slot interior 301 corresponding to the welded end connected to the lead end of the third branch winding of the phase winding is located in the 38th slot of the first layer of the stator core and is located in a slot where a conductor of a fourth conductor group is located in the 39th slot of the first layer of the stator core, and is located within two circumferentially adjacent slots of the stator core. The slot interior 301 corresponding to the welded end connected to the lead end of the first branch winding of the phase winding is located in the 45th slot of the first layer of the stator core and is located in a slot where a conductor of a fourth conductor group is located in the 44th slot of the first layer of the stator core, and is located within two circumferentially adjacent slots of the stator core. That is, the slot interior corresponding to the welded end connected to the lead end of the third branch winding and the two slot interiors of a conductor of a fourth conductor group are located within two circumferentially adjacent slots of the stator core.

[0086] Furthermore, the first conductor group includes two first conductors, and the two slots of the first first conductor 150 of the first conductor group are located in the 7th slot and the 13th slot of the 6th layer of the stator core, and the two slots of the second first conductor 150 of the first conductor group are located in the 8th slot and the 14th slot of the 6th radial layer of the stator core, that is, the pitch between the two slots of the two first conductors of the first conductor group is a full pitch, and the two slots of the two first conductors 150 of the first conductor group are respectively located in two circumferentially adjacent slots of the sixth layer of the stator core. The two slots of the fourth large conductor 100A of the fourth conductor group are located in the 13th and 20th slots of the first radial layer of the stator core, and the two slots of the fourth small conductor 100B of the fourth conductor group are located in the 14th and 19th slots of the first radial layer of the stator core. That is, the pitch between the two slots of the fourth large conductor of the fourth conductor group is a long pitch of 7, and the pitch between the two slots of the fourth small conductor of the fourth conductor group is a short pitch of 5. The two slots of the fourth large conductor 100A of the fourth conductor group surround the two slots of the fourth small conductor 100B in the first circumferential layer of the stator core.

[0087] Combine Figure 9 、 Figure 15As shown, in embodiment 1, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the fifth radial layer of the stator core is the first connection welding end. The welding end located in the sixth radial layer of the stator core is the second connection welding end, and the sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the short pitch 5; specifically, the pitch between the first connection welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the sixth radial layer of the stator core and the second connection welding end of a welding end of a sixth conductor 350 or a third conductor 250 located in the fifth layer adjacent to the stator core in the same radial direction is the short pitch 5, and the pitch between the first connection welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the fourth radial layer of the stator core is the short pitch 5. The pitch between the first connection welding end of the other welding end of the three conductors 250 and the second connection welding end of a welding end of a sixth conductor 350 or a third conductor 250 located in the same radially adjacent third layer of the stator core is short pitch 5, and the pitch between the first connection welding end of the other welding end of a sixth conductor 350 or a third conductor 250 located in the same radially adjacent second layer of the stator core and the second connection welding end of a welding end of a second conductor 350 or a fourth large conductor 100A or a fourth small conductor 100B located in the same radially adjacent first layer of the stator core is short pitch 5; the second conductor group The two conductors of the second conductor group are identical sixth conductors, and the sixth conductor of the second conductor group is located in the first and second radial layers, and the third and fourth layers of the stator core. The two slots of the sixth conductor 350 of the second conductor group are located in core slots 1 and 8, respectively. The two slots of the second sixth conductor 350 of the second conductor group are located in slots 2 and 9, respectively. That is, the pitch between the two slots of the second conductors is a long pitch of 7. The two conductors of the third conductor group are identical third conductors 250, and the third conductor of the third conductor group is located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in core slots 19 and 26, and the two slots of the second third conductor 250 of the third conductor group are located in core slots 20 and 27. That is, the pitch between the two slots of the third conductor 250 of the third conductor group in the seventh embodiment is a long pitch of 7.

[0088] Combine Figure 10 、 Figure 15As shown, in embodiment 2, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the The welding end of the fifth radial layer of the stator core is the first connecting welding end, and the welding end located in the sixth radial layer of the stator core is the second connecting welding end. The sum of the span of the first connecting welding end and the span of the second connecting welding end adjacent to each other in the same radial direction of the stator core is the short pitch 5. Specifically, the pitch between the first connecting welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the sixth radial layer of the stator core and the second connecting welding end of a welding end of a sixth conductor 350 or a fifth large conductor 200A or a fifth small conductor 200B located in the fifth adjacent radial layer of the stator core is the short pitch 5. The pitch between the first connecting weld end of the other welding end of the stator core and the second connecting weld end of a welding end of a sixth conductor 350, a fifth large conductor 200A, or a fifth small conductor 200B located in the same radially adjacent third layer of the stator core is a short pitch 5; the pitch between the first connecting weld end of the other welding end of a sixth conductor 350, a fifth large conductor 200A, or a fifth small conductor 200B located in the same radially adjacent second layer of the stator core and the second connecting weld end of a welding end of a sixth conductor 350, a fourth large conductor 100A, or a fourth small conductor 100B located in the same radially adjacent first layer of the stator core is a short pitch 5; the two conductors of the second conductor group are the same sixth conductor, and the sixth conductor of the second conductor group is located in the first and second layers, and the third and fourth layers in the radial direction of the stator core, the two slots of the second conductor of the second conductor group are located in core slots 1 and 8, respectively, and the two slots of the second sixth conductor 350 of the second conductor group are located in slots 2 and 9, respectively, that is, the pitch between the two slots of the sixth conductor 350 is a long pitch 7;The two conductors of the third conductor group are different: a fifth large conductor 200A and a fifth small conductor 200B. These conductors are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A are located in core slots 19 and 27, respectively, while the two slots of the fifth small conductor 200B are located in core slots 20 and 26, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a long pitch of 8, while the pitch between the two slots of the fifth small conductor 200B is a full pitch of 6. The two slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group.

[0089] Combine Figure 11 、 Figure 15As shown, in embodiment three, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are different. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, the welding end located in the fifth radial layer of the stator core is the first connection welding end, and the welding end located in the sixth radial layer of the stator core is the second connection welding end. The connection end is the second connection welding end, and the sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the short pitch 5. Specifically, the pitch between the first connection welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the sixth layer in the same radial direction of the stator core and the second connection welding end of a welding end of a sixth conductor 350 or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the fifth layer adjacent to each other in the same radial direction of the stator core is the short pitch 5. The pitch between the first connecting welded end of the other welded end of a sixth conductor 350, or a fifth large conductor 200A, or a fifth small conductor 200B located in the same radial direction of the stator core, and the second connecting welded end of a welded end of a sixth conductor 350, or a fifth large conductor 200A, or a fifth small conductor 200B located in the third adjacent radial direction of the stator core is short pitch 5; the pitch between the first connecting welded end of the other welded end of a sixth conductor 350, or a fifth large conductor 200A, or a fifth small conductor 200B located in the second radial direction of the stator core, and the second connecting welded end of a welded end of a sixth conductor 350, or a fourth large conductor 100A, or a fourth small conductor 100B located in the first adjacent radial direction of the stator core is short pitch 5; the two conductors of the second conductor group are the same sixth conductor, and the sixth conductor of the second conductor group is located in the first and second radial layers, and the third and fourth radial layers of the stator core. The two slots of the sixth conductor of the second conductor group are located in the core slots 1 and 8 respectively, and the two slots of the second sixth conductor 350 of the second conductor group are located in the slots 2 and 9 respectively, that is, the pitch between the two slots of the sixth conductor 350 is the long pitch 7;The six identical first and third conductor groups are provided, wherein the two conductors of the first third conductor group are different fifth large conductors 200A and fifth small conductors 200B, and the two conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A of the third conductor group are located in core slots 19 and 27, respectively, and the two slots of the fifth small conductor 200B of the third conductor group are located in core slots 20 and 26, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a long pitch 8, and the pitch between the two slots of the fifth small conductor 200B is a full pitch 6. The two slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group. The six identical second and third conductor groups are provided, wherein the two conductors of the second third conductor group are the same third conductor 250, and the third conductor of the third conductor group is located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in core slots 26 and 33, and the second third conductor 250 of the third conductor group is located in core slots 26 and 33. The two slots of the third conductor 250 are located in the core slots 26 and 33, that is, the pitch between the two slots of the third conductor 250 is the long pitch 7.

[0090] Combine Figure 12 、 Figure 15As shown, in embodiment 4, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the fourth radial layer of the stator core is the second connection welding end. The welding end of the fifth radial layer of the stator core is the first connection welding end, and the welding end located in the sixth radial layer of the stator core is the second connection welding end. The sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the short pitch 5. Specifically, the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located in the sixth radial layer of the stator core is connected to the second large conductor 300A or the second small conductor 300B located in the fifth layer adjacent to each other in the same radial direction of the stator core. or the pitch at which the second connection welding end of a welding end of a third conductor 250 is connected is a short pitch of 5; the pitch at which the first connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the fourth layer in the same radial direction of the stator core is connected to the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the third layer adjacent in the same radial direction of the stator core is short pitch 5; the pitch at which the first connection welding end of another welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the second layer in the same radial direction of the stator core is connected to the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the first layer adjacent in the same radial direction of the stator core is short pitch 5;The second conductor group consists of two different second large conductors and second small conductors. The conductors of the second conductor group are located in the first and second, third, and fourth radial layers of the stator core. The two slots of the second large conductor of the second conductor group are located in core slots 1 and 9, respectively, and the two slots of the second small conductor of the second conductor group are located in core slots 2 and 8, respectively. That is, the pitch between the two slots of the second large conductor is a long pitch of 8, and the pitch between the two slots of the second small conductor is a full pitch of 6. The two conductors of the third conductor group are identical third conductors 250. The third conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in core slots 19 and 26, and the two slots of the second third conductor 250 of the third conductor group are located in core slots 20 and 27, respectively. That is, the pitch between the two slots of the third conductor 250 is a long pitch of 7.

[0091] Combine Figure 13 、 Figure 15As shown, in embodiment five, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, the welding end located in the fifth radial layer of the stator core is the first connection welding end, the welding end located in the sixth radial layer of the stator core is the second connection welding end, and the welding ends located in the same radial direction of the stator core are the same. The sum of the spans of the adjacent first connection welding ends and the second connection welding ends is the short pitch 5; specifically, the pitch between the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located in the sixth layer in the same radial direction of the stator core and the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the fifth layer adjacent in the same radial direction of the stator core is the short pitch 5, and the pitch between the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the fourth layer in the same radial direction of the stator core is the short pitch 5. The pitch at which the first connecting welding end of one welding end is connected to the second connecting welding end of one welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the third layer adjacent in the same radial direction of the stator core is short pitch 5, and the pitch at which the first connecting welding end of another welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the second layer adjacent in the same radial direction of the stator core is connected to the second connecting welding end of one welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the first layer adjacent in the same radial direction of the stator core is short pitch 5;The second conductor group consists of two different second large conductors and a second small conductor. The conductors of the second conductor group are located in the first, second, third, and fourth radial layers of the stator core. The second large conductor of the second conductor group has two slots located in slots 1 and 9, respectively, and the second small conductor of the second conductor group has two slots located in slots 2 and 8, respectively. That is, the pitch between the two slots of the second large conductor is a long pitch of 8, and the pitch between the two slots of the second small conductor is a full pitch of 6. The two conductors of the third conductor group are different fifth large conductors 200A and fifth small conductors 200B. The two conductors of the third conductor group are located in the third and second radial layers of the stator core. The fifth large conductor 200A of the third conductor group has two slots located in core slots 19 and 27, respectively, and the fifth small conductor 200B of the third conductor group has two slots located in core slots 20 and 26, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a long pitch of 8, and the pitch between the two slots of the fifth small conductor 200B is a full pitch of 6. The two slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group.

[0092] Combine Figure 14 、 Figure 15In the sixth embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are different. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, and the welding end located in the fourth radial layer of the stator core is The second connection welding end, the welding end located in the fifth radial layer of the stator core is the first connection welding end, the welding end located in the sixth radial layer of the stator core is the second connection welding end, and the sum of the spans of the first connection welding ends and the second connection welding ends adjacent to each other in the same radial direction of the stator core is the short pitch 5; specifically, the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located in the sixth radial layer of the stator core is connected to the second large conductor 300A or a second small conductor 300B located in the fifth layer adjacent to each other in the same radial direction of the stator core. The pitch at which the second connection welding end of a welding end of a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B is connected is a short pitch 5, and the first connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the fourth layer in the same radial direction of the stator core is connected to the second large conductor 300A or a second small conductor 300B or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the third layer adjacent to the stator core in the same radial direction. The pitch at which the second connecting welding end of one welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B is connected is a short pitch 5; the pitch at which the first connecting welding end of another welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial direction second layer of the stator core is connected to the second connecting welding end of one welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the same radial direction adjacent first layer of the stator core is a short pitch 5;The second conductor group consists of two different second large conductors and second small conductors, and the conductors of the second conductor group are located in the first and second, third and fourth radial layers of the stator core. The two slots of the second large conductor of the second conductor group are located in core slots 1 and 9, respectively, and the two slots of the second small conductor of the second conductor group are located in core slots 2 and 8, respectively. That is, the pitch between the two slots of the second large conductor is a long pitch 8, and the pitch between the two slots of the second small conductor is a full pitch 6. The six identical first and third conductor groups, among which the two conductors of the first third conductor group are different fifth large conductors 200A and fifth small conductors 200B, and the conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A of the third conductor group are located in core slots 19 and 27, respectively. The two slots of the fifth small conductor 200B are located in core slots 20 and 26, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a long pitch of 8, and the pitch between the two slots of the fifth small conductor 200B is a full pitch of 6. The two slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group. Six identical second and third conductor groups are provided, with the two conductors of the second third conductor group being identical third conductors 250. The conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in core slots 26 and 33, and the two slots of the second third conductor 250 of the third conductor group are located in core slots 26 and 33. That is, the pitch between the two slots of the third conductors 250 is a long pitch of 7.

[0093] Combine Figure 16 、 Figure 22As shown, in embodiment seven, each phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the fifth radial layer of the stator core is The first connection welding end, the welding end located in the sixth radial layer of the stator core is the second connection welding end, and the sum of the spans of the first connection welding ends and the second connection welding ends adjacent to each other in the same radial direction of the stator core is the long pitch 7; specifically, the pitch between the first connection welding end of one welding end of a first conductor 150 or one sixth conductor 350 located in the sixth radial layer of the stator core and the second connection welding end of one welding end of a sixth conductor 350 or one third conductor 250 located in the fifth adjacent radial layer of the stator core is the long pitch 7, and the first connection welding end of the other welding end of a sixth conductor 350 or one third conductor 250 located in the fourth radial layer of the stator core is the long pitch 7. The pitch between the connection welding end and the second connection welding end of a sixth conductor 350 or a welding end of a third conductor 250 located in the same radially adjacent third layer of the stator core is long pitch 7, and the pitch between the first connection welding end of another welding end of a sixth conductor 350 or a third conductor 250 located in the same radially adjacent second layer of the stator core and the second connection welding end of a welding end of a second conductor 350 or a fourth large conductor 100A or a fourth small conductor 100B located in the same radially adjacent first layer of the stator core is long pitch 7; the two conductors of the second conductor group are the same sixth conductor, and the sixth conductor of the second conductor group is located in the first and second radial layers of the stator core. In the second, third, and fourth layers, the two slots of the first sixth conductor of the second conductor group are located in the core slots 2 and 7, respectively, and the two slots of the second sixth conductor of the second conductor group are located in the core slots 3 and 8, respectively. That is, the pitch between the two slots of the sixth conductors is a short pitch of 5. The two conductors of the third conductor group are identical third conductors 250, and the third conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in the core slots 20 and 25, and the two slots of the second third conductor 250 of the third conductor group are located in the core slots 21 and 26. That is, the pitch between the two slots of the third conductor 250 is a short pitch of 5.

[0094] Combine Figure 16 、 Figure 22As shown, in embodiment eight, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the The welding end of the fifth radial layer of the stator core is the first connection welding end, and the welding end located in the sixth radial layer of the stator core is the second connection welding end. The sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the long pitch 7. Specifically, the first connection welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the sixth radial layer of the stator core is connected to a sixth conductor 350 or a fifth large conductor 200A or a fifth small conductor 200B located in the fifth layer adjacent to each other in the same radial direction of the stator core. The pitch at which the second connecting welding end of one welding end of a sixth conductor 350 or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial fourth layer of the stator core is connected to the second connecting welding end of one welding end of a sixth conductor 350 or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial adjacent third layer of the stator core is connected is long pitch 7; the pitch at which the first connecting welding end of another welding end of a sixth conductor 350 or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial second layer of the stator core is connected to the second connecting welding end of one welding end of a sixth conductor 350 or a fourth large conductor 100A or a fourth small conductor 100B located in the same radial adjacent first layer of the stator core is long pitch 7;The two conductors of the second conductor group are identical sixth conductors, and the sixth conductors of the second conductor group are located in the first and second, third, and fourth radial layers of the stator core. The two slots of the first sixth conductor of the second conductor group are located in core slots 2 and 7, respectively, and the two slots of the second sixth conductor of the second conductor group are located in core slots 3 and 8, respectively. That is, the pitch between the two slots of the sixth conductors is a short pitch of 5. The two conductors of the third conductor group are different fifth large conductors 200A and fifth small conductors 200B. The conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A of the third conductor group are located in core slots 20 and 26, respectively, and the two slots of the fifth small conductor 200B of the third conductor group are located in core slots 21 and 25, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a full pitch of 6, and the pitch between the two slots of the fifth small conductor 200B is a short pitch of 4. The two slots of the fifth large conductor 200A of the third conductor group surround the two slots of the fifth small conductor 200B of the third conductor group.

[0095] Combine Figure 18 、 Figure 22As shown, in embodiment nine, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are different. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, the welding end located in the fifth radial layer of the stator core is the first connection welding end, and the welding end located in the sixth radial layer of the stator core is the second connection welding end. The connection end is the second connection welding end, and the sum of the spans of the first connection welding ends and the second connection welding ends adjacent to each other in the same radial direction of the stator core is a long pitch of 7. Specifically, the pitch between the first connection welding end of a welding end of a first conductor 150 or a sixth conductor 350 located in the sixth layer in the same radial direction of the stator core and the second connection welding end of a welding end of a sixth conductor 350 or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the fifth layer adjacent to each other in the same radial direction of the stator core is a long pitch of 7. The pitch between the first connecting welded end of the other welded end of a sixth conductor 350, a fifth large conductor 200A, or a fifth small conductor 200B located in the same radial direction of the stator core and the second connecting welded end of a welded end of a sixth conductor 350, a fifth large conductor 200A, or a fifth small conductor 200B located in the adjacent third layer in the same radial direction of the stator core is long pitch 7; the pitch between the first connecting welded end of the other welded end of a sixth conductor 350, a fifth large conductor 200A, or a fifth small conductor 200B located in the second layer in the same radial direction of the stator core and the second connecting welded end of a welded end of a sixth conductor 350, a fourth large conductor 100A, or a fourth small conductor 100B located in the adjacent first layer in the same radial direction of the stator core is long pitch 7;The two conductors of the second conductor group are the same as the sixth conductor, and the sixth conductor of the second conductor group is located in the first and second layers, the third and fourth layers in the radial direction of the stator core. The two slots of the first sixth conductor of the second conductor group are located in core slots 2 and 7, respectively. The two slots of the second sixth conductor of the second conductor group are located in core slots 3 and 8, respectively. Six identical first and third conductor groups are included, wherein the two conductors of the first third conductor group are different fifth large conductors 200A and fifth small conductors 200B. The conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A of the third conductor group are located in core slots 20 and 26, respectively. The two slots of the fifth small conductor 200B of the third conductor group are located in core slots 21 and 25, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a full pitch of 6, and the pitch between the two slots of the fifth small conductor 200B is a short pitch of 4. The two slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group. Six identical second and third conductor groups are included, wherein the two conductors of the first third conductor group are the same third conductor 250. The conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in the core slots 26 and 31, and the two slots of the second third conductor 250 of the third conductor group are located in the core slots 27 and 32. That is, the pitch between the two slots of the third conductor 250 is a short pitch of 5.

[0096] Combine Figure 19 、 Figure 22As shown, in embodiment 10, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the fourth radial layer of the stator core is the second connection welding end. The welding end of the fifth radial layer of the stator core is the first connection welding end, and the welding end located in the sixth radial layer of the stator core is the second connection welding end. The sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the long pitch 7. Specifically, the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located in the sixth radial layer of the stator core is connected to the second large conductor 300A or the second small conductor 300B located in the fifth layer adjacent to each other in the same radial direction of the stator core. or the pitch at which the second connection welding end of a welding end of a third conductor 250 is connected is long pitch 7; the pitch at which the first connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the same radial fourth layer of the stator core is connected to the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the adjacent third layer in the same radial direction of the stator core is long pitch 7; the pitch at which the first connection welding end of another welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 located in the second layer in the same radial direction of the stator core is connected to the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the adjacent first layer in the same radial direction of the stator core is long pitch 7;The second conductor group consists of two different second large conductors and second small conductors. The conductors of the second conductor group are located in the first and second, third, and fourth radial layers of the stator core. The two slots of the second large conductor of the second conductor group are located in core slots 2 and 8, respectively, and the two slots of the second small conductor of the second conductor group are located in core slots 3 and 7, respectively. That is, the pitch between the two slots of the second large conductor is a full pitch of 6, and the pitch between the two slots of the second small conductor is a short pitch of 4. The two conductors of the third conductor group are identical third conductors 250. The third conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the first third conductor 250 of the third conductor group are located in core slots 20 and 25, and the two slots of the second third conductor 250 of the third conductor group are located in core slots 21 and 26. That is, the pitch between the two slots of the third conductor 250 is a short pitch of 5.

[0097] Combine Figure 20 、 Figure 22As shown, in Example 11, the phase winding (U-phase winding, V-phase winding, or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are the same. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding, V-phase winding, or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, the welding end located in the fourth radial layer of the stator core is the second connection welding end, and the welding end located in the fifth radial layer of the stator core is the first connection welding end. The welding end located at the sixth radial layer of the stator core is the second connection welding end, and the sum of the span of the first connection welding end and the span of the second connection welding end adjacent to each other in the same radial direction of the stator core is the long pitch 7; specifically, the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located at the sixth radial layer of the stator core is connected to the first connection welding end of a second large conductor 300A or a second small conductor 300B located at the fifth layer adjacent to the stator core in the same radial direction. The pitch at which the second connection welding end of a welding end of a conductor 200A or a fifth small conductor 200B is connected is the long pitch 7. The first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located in the fourth layer in the same radial direction of the stator core is connected to the second connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the third layer adjacent in the same radial direction of the stator core. The pitch at which the welding ends are connected is a long pitch of 7. The pitch at which the first connecting welding end of the other welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial second layer of the stator core is connected to the second connecting welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the adjacent first layer of the stator core in the same radial direction is a long pitch of 7.The second conductor group includes two different second large conductors and second small conductors, and the conductors of the second conductor group are located in the first and second, third and fourth radial layers of the stator core. The two slots of the second large conductor of the second conductor group are located in slots 2 and 8, respectively, and the two slots of the second small conductor of the second conductor group are located in slots 3 and 7, respectively. That is, the pitch between the two slots of the second large conductor is a full pitch of 6, and the pitch between the two slots of the second small conductor is a short pitch of 4. The two conductors of the third conductor group are different fifth large conductors 200A and 200A. The fifth small conductor 200B and the conductors of the third conductor group are located in the third and second radial layers of the stator core. The two slots of the fifth large conductor 200A of the third conductor group are located in core slots 20 and 26, respectively. The two slots of the fifth small conductor 200B of the third conductor group are located in core slots 21 and 25, respectively. That is, the pitch between the two slots of the fifth large conductor 200A is a full pitch of 6, and the pitch between the two slots of the fifth small conductor 200B is a short pitch of 4. The two slots of the fifth large conductor 200A of the third conductor group surround the two slots of the fifth small conductor 200B of the third conductor group.

[0098] Combine Figure 21 、 Figure 22In the twelfth embodiment, the phase winding (U-phase winding or V-phase winding or W-phase winding) includes 12 third conductor groups, and the 12 third conductor groups are different. When the even number of layers is 8, the U-phase winding includes 18 third conductor groups; the phase winding (U-phase winding or V-phase winding or W-phase winding) has a plurality of first connection welding ends and second connection welding ends connected together, the welding end located in the first radial layer of the stator core is the first connection welding end, the welding end located in the second radial layer of the stator core is the second connection welding end, the welding end located in the third radial layer of the stator core is the first connection welding end, and the welding end located in the fourth radial layer of the stator core is the second connection welding end. The second connection welding end is the welding end located at the fifth radial layer of the stator core, the welding end located at the sixth radial layer of the stator core is the second connection welding end, and the sum of the spans of the first connection welding ends and the second connection welding ends adjacent to each other in the same radial direction of the stator core is the long pitch 7; specifically, the first connection welding end of a welding end of a first conductor 150 or a second large conductor 300A or a second small conductor 300B located at the sixth radial layer of the stator core is connected to the second large conductor 300A or a second small conductor 300B located at the fifth radial layer of the stator core. The pitch at which the second connection welding end of a welding end of a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B is connected is the long pitch 7, and the first connection welding end of a welding end of a second large conductor 300A or a second small conductor 300B or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the fourth layer in the same radial direction of the stator core is connected to the second large conductor 300A or a second small conductor 300B or a third conductor 250 or a fifth large conductor 200A or a fifth small conductor 200B located in the third layer adjacent to the stator core in the same radial direction. The pitch at which the second connecting welding end of one welding end of 00A or a fifth small conductor 200B is connected is long pitch 7, and the pitch at which the first connecting welding end of another welding end of a second large conductor 300A or a second small conductor 300B or a fifth large conductor 200A or a fifth small conductor 200B located in the same radial direction second layer of the stator core is connected to the second connecting welding end of one welding end of a second large conductor 300A or a second small conductor 300B or a fourth large conductor 100A or a fourth small conductor 100B located in the same radial direction adjacent first layer of the stator core is long pitch 7;The second conductor group includes two different second large conductors and second small conductors, and the conductors of the second conductor group are located in the first, second, third, and fourth radial layers of the stator core. The two slots of the second large conductor of the second conductor group are located in slots 2 and 8, respectively, and the two slots of the second small conductor of the second conductor group are located in slots 3 and 7, respectively. That is, the pitch between the two slots of the second large conductor is a full pitch of 6, and the pitch between the two slots of the second small conductor is a short pitch of 4. Among the six identical first and third conductor groups, the two conductors of the first third conductor group are different fifth large conductors 200A and fifth small conductors 200B. The conductors of the third conductor group are located in the third and second radial layers of the stator core. The slots of the fifth large conductor 200A of the third conductor group are located in core slots 20 and 26, respectively. The slots of the fifth small conductor 200B of the third conductor group are located in core slots 21 and 25, respectively. That is, the pitch between the slots of the fifth large conductor 200A is a full pitch of 6, and the pitch between the slots of the fifth small conductor 200B is a short pitch of 4. The slots of the fifth large conductor 200A of the third conductor group surround the fifth small conductor 200B of the third conductor group. Six identical second third conductor groups are provided, wherein the two conductors of the first third conductor group are identical third conductors 250. The conductors of the third conductor groups are located in the third and second radial layers of the stator core. The slots of the first third conductor 250 of the third conductor group are located in core slots 26 and 31, and the slots of the second third conductor 250 of the third conductor group are located in core slots 27 and 32, respectively. That is, the slots of the third conductors 250 are located in a short pitch of 5.

[0099] For example, Figure 25 As shown, this is the star connection of the series winding of the motor, such as Figure 26 As shown, this is the delta connection method of the series winding of the motor.

[0100] This embodiment further provides a motor, including the above-mentioned motor stator, and a motor using the above-mentioned motor stator.

[0101] The motor provided by the embodiment of the present invention includes the motor stator in the above embodiment. Therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0102] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium (bus connection), or the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above in the present invention can be understood according to the specific circumstances. Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used.

[0103] Those skilled in the art will understand that the present invention is not limited to the embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A motor stator, comprising: a stator core having a plurality of slots formed on a radially inner surface of the stator core and spaced apart at a predetermined slot pitch along a circumferential direction of the stator core; a stator winding having two slots per pole and per phase, the stator winding including a plurality of phase windings mounted on the stator core so as to be different in electrical phase from one another; Its characteristics are: Each phase winding comprises three branches connected in parallel in sequence along the circumference of the stator core; At least one branch winding of the three-branch windings of each phase winding includes: one first conductor group, multiple second conductor groups, multiple third conductor groups, and one fourth conductor group, or at least one branch winding of the three-branch windings of each phase winding includes: multiple second conductor groups, multiple third conductor groups, and one fourth conductor group, or at least one branch winding of the three-branch windings of each phase winding includes: one first conductor group, multiple second conductor groups, and multiple third conductor groups; Each slot is divided into M layers distributed along the radial direction according to the number of slot interiors that each slot can accommodate along the radial direction of the stator core, where M is an even number greater than or equal to 6. The first conductor group of each branch winding is located at the Mth radial layer of the stator core, and the fourth conductor group of the branch winding is located at the first radial layer of the stator core; Each of the conductor groups includes a plurality of conductors, and each conductor of the conductor group includes: two welding ends located in two slots of the stator core separated by a predetermined slot pitch, located in the two slots connected to the conductor at the second axial end of the stator core, and a plug-in end located in the two slots connected to the conductor at the first axial end of the stator core; The welding end connected to the lead wire of each branch winding of each phase winding is located at the first axial end of the stator core; The second conductor set includes: a second large conductor and a second small conductor, or the second conductor set includes: two identical sixth conductors; The pitch between the two slots of the second large conductor of the second conductor group is a long pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a full pitch; or the pitch between the two slots of the second large conductor of the second conductor group is a full pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a short pitch; or the pitch between the two slots of the sixth conductor of the second conductor group is a long pitch; Or the pitch between the two slots of the sixth conductor of the second conductor group is a short pitch.

2. The motor stator according to claim 1, characterized in that: The welding end connected to the lead wire of at least one branch winding of each phase winding is located at two adjacent radial layers of the stator core, and the welding end connected to the lead wire of at least one branch winding is located at the Nth and N+1th layers in the radial direction of the stator core, or the welding end connected to the lead wire of at least one branch winding is located at the N+1 and N+2th layers in the radial direction of the stator core, where N is an odd number.

3. The motor stator according to claim 1, characterized in that: The welding end for connecting the lead wire of at least one branch winding of each phase winding is located at the Mth layer or the first layer in the same radial direction of the stator core.

4. The motor stator according to any one of claims 2 to 3, characterized in that: One of the branch windings of each of the phase windings further includes a conductor of the first conductor group, or one of the branch windings of each of the phase windings further includes a conductor of the second conductor group, or one of the branch windings of each of the phase windings further includes a conductor of the third conductor group, or one of the branch windings of each of the phase windings further includes a conductor of the fourth conductor group.

5. The motor stator according to claim 4, characterized in that: The interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each of the phase windings and the interior of two slots of a conductor of the second conductor group are located within two adjacent slots in the circumferential direction of the stator core; and / or the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each of the phase windings and the interior of two slots of a conductor of the third conductor group are located within two adjacent slots in the circumferential direction of the stator core.

6. The motor stator according to claim 4, characterized in that: The interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each of the phase windings and the interior of two slots of a conductor of the first conductor group are located within two adjacent slots in the circumferential direction of the stator core; and / or the interior of a slot corresponding to a welding end connected to a lead wire of at least one branch winding in each of the phase windings and the interior of two slots of a conductor of the fourth conductor group are located within two adjacent slots in the circumferential direction of the stator core.

7. The motor stator according to any one of claims 5 to 6, characterized in that: The first conductor group includes two first conductors, and the pitch between the two slots of each first conductor is a full pitch; the fourth conductor group includes a fourth large conductor and a fourth small conductor, the pitch between the two slots of the fourth large conductor is a long pitch, and the pitch between the two slots of the fourth small conductor is a short pitch.

8. The motor stator according to claim 7, characterized in that: The two slots of each conductor of the second conductor group are respectively located in the radially adjacent Nth layer and N+1th layer of the stator core, where N is an odd number; The third conductor group includes two conductors. The two slots of each conductor of the third conductor group are respectively located in the radially adjacent (N+1) layer and (N+2) layer of the stator core.

9. The motor stator according to claim 8, characterized in that: The phase winding has multiple first connection welding ends and multiple second connection welding ends connected together, the welding ends located in the M-1th layer adjacent in the same radial direction of the second axial end of the stator core are first connection welding ends, and the welding ends located in the Mth layer adjacent in the same radial direction of the second axial end of the stator core are second connection welding ends, where M is an even number.

10. The motor stator according to claim 9, characterized in that: When the pitch between the two slots of the second large conductor of the second conductor group is a long pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a full pitch; the two conductors of the third conductor group are the same third conductor, and the pitch between the two slots of the third conductor is a long pitch, and / or the two conductors of each third conductor group of the phase winding are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a full pitch; the sum of the span of the first connecting welding end and the span of the second connecting welding end is a short pitch.

11. The motor stator according to claim 9, characterized in that: When the pitch between the two slots of the second large conductor of the second conductor group is a full pitch, and the pitch between the two slots of the second small conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a short pitch, and / or the two conductors of each of the third conductor groups of the phase winding are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch, the sum of the span of the first connecting welding end and the span of the second connecting welding end is a long pitch.

12. The motor stator according to claim 9, characterized in that: When the pitch between the two slots of the sixth conductor of the second conductor group is a long pitch; the two conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a long pitch, and / or the two conductors of the third conductor group are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a long pitch, and the pitch between the two slots of the fifth small conductor is a full pitch; the sum of the span of the first connection welding end and the span of the second connection welding end is a short pitch.

13. The motor stator according to claim 9, characterized in that: When the pitch between the two slots of the sixth conductor of the second conductor group is a short pitch; the two conductors of the third conductor group are the same third conductor, the pitch between the two slots of the third conductor is a short pitch, and / or the two conductors of the third conductor group are a fifth large conductor and a fifth small conductor, the pitch between the two slots of the fifth large conductor is a full pitch, and the pitch between the two slots of the fifth small conductor is a short pitch; the sum of the span of the first connection welding end and the span of the second connection welding end is a long pitch.

14. A motor, characterized in that: The motor stator comprises the stator according to any one of claims 1 to 13.

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