A motor winding and a motor stator

Abstract

The present invention provides a motor winding and a motor stator. The motor winding arranges N first segmented coil units and M second segmented coil units in sequence along the circumferential direction, wherein the slot pitch of the second segmented coil unit is a short pitch X, and the third slot inner part and the fourth slot inner part of the second segmented coil unit are arranged on the same layer of the motor winding. By setting the outermost layer and the innermost layer of the motor winding as the second segmented coil unit, and the winding structure adopts a completely symmetrical structure on the magnetic circuit, the loop current generated by the asymmetric structure is eliminated, the busbars between each phase are cancelled, the direct connection between each phase is realized, and the branches and neutral points of each phase winding are set in any slot and any layer, thereby reducing the complexity of the manufacturing process, reducing the production cost, reducing the material cost, and improving the processing efficiency.

Description

Technical Field

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

[0002] The stator winding includes a plurality of hairpin coils, which are inserted into the slots of the stator core in a certain arrangement to form the winding of the required single-phase motor or multi-phase motor. There are many types of hairpin coils used in the prior art, and the arrangement is complex. A large number of bus bars and busbars are required to connect the branches and neutral points of each phase winding, and the manufacturing process is complex, the production cost is high, and the processing efficiency is low. Summary of the invention

[0003] The present invention provides a motor winding and a motor stator, which adopt a completely symmetrical structure on the magnetic circuit through the winding structure, thereby eliminating the loop current generated by the asymmetrical structure; canceling the busbars between phases, realizing direct connection between phases, and realizing that the branches and neutral points of each phase winding are set in any slot and any layer, thereby reducing the complexity of the manufacturing process, reducing the production cost, reducing the material cost, and improving the processing efficiency.

[0004] An embodiment of the present invention provides a motor winding, comprising

[0005] Three-phase segmented coil;

[0006] The segmented coil of each phase includes N first segmented coil units and M second segmented coil units, wherein N≥2, M≥4, and N and M are both integers;

[0007] Any of the first segmented coil units comprises: a first slot outer end portion, a first slot inner portion, a first slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, wherein the first slot inner portion and the second slot inner portion are located in different slots;

[0008] Any of the second segmented coil units comprises: a third slot outer end portion, a third slot inner portion, a second slot outer turning portion, a fourth slot inner portion and a fourth slot outer end portion connected in sequence, wherein the third slot inner portion and the fourth slot inner portion are located in different slots;

[0009] The slot pitch of the first segmented coil unit is a first pitch, wherein the first pitch is one of the following: full pitch Y, long pitch Z, short pitch X; the slot pitch of the second segmented coil unit is a second pitch, wherein the second pitch is short pitch X or long pitch Z, and Z>Y>X;

[0010] N first segmented coil units are arranged in sequence along the circumferential direction, the first slot inner part and the second slot inner part of each first segmented coil unit are distributed in two layers along the radial direction, and the first segmented coil unit is radially arranged in any layer of the motor winding except the outermost layer and the innermost layer;

[0011] The M second segmented coil units are arranged in sequence along the circumferential direction, the third slot inner part and the fourth slot inner part of each second segmented coil unit are distributed in the same layer along the radial direction, and the second segmented coil units are radially arranged at the outermost layer and the innermost layer of the motor winding.

[0012] Furthermore, the number of parallel branches of the motor winding is equal to the number of motor poles, and the sum of the number of coil layers in the two slots is an integer multiple of the number of parallel branches.

[0013] Furthermore, the number of parallel branches of the motor winding is less than the number of motor poles, and the sum of the number of coil layers in the two slots is an integer multiple of the number of parallel branches.

[0014] Furthermore, the number of coil layers of the motor winding along the radial direction is an even number greater than or equal to 4.

[0015] Further, the first slot outer end portion and the second slot outer end portion of the first segmented coil unit extend in opposite directions and are far away from each other along the circumferential direction;

[0016] The third slot outer end portion and the fourth slot outer end portion of the second segment coil unit extend in the same circumferential direction.

[0017] Further, the second segmented coil unit includes a first card issuing unit and a second card issuing unit; the outer ends of the slots of the first card issuing unit and the second card issuing unit extend in opposite directions along the circumferential direction, wherein the two outer ends of the slots of the first card issuing unit extend in a counterclockwise direction along the circumferential direction, and the two outer ends of the slots of the second card issuing unit extend in a clockwise direction along the circumferential direction;

[0018] The first card issuing unit is arranged at the outermost layer of the motor winding, and the third slot inner part and the fourth slot inner part of the first card issuing unit are distributed in the same layer; the second card issuing unit is arranged at the innermost layer of the motor winding, and the third slot inner part and the fourth slot inner part of the second card issuing unit are distributed in the same layer;

[0019] Alternatively, the first card issuing unit is arranged at the innermost layer of the motor winding, and the third slot portion and the fourth slot portion of the first card issuing unit are distributed in the same layer; the second card issuing unit is arranged at the outermost layer of the motor winding, and the third slot portion and the fourth slot portion of the second card issuing unit are distributed in the same layer.

[0020] Further, when the first pitch is the full pitch Y, the sum of the lengths of the first slot outer end and the second slot outer end of the first segmented coil unit is the full pitch Y, and the sum of the lengths of the third slot outer end and the fourth slot outer end of the second segmented coil unit is the full pitch Y; the third slot inner portion of each of the first card issuing units is arranged in the same slot as the third slot inner portion of one of the second card issuing units, and the fourth slot inner portion of each of the first card issuing units is arranged in the same slot as the fourth slot inner portion of one of the second card issuing units;

[0021] When the first pitch is a long pitch Z, the sum of the lengths of the first slot outer end and the second slot outer end of the first segmented coil unit is a short pitch X, the sum of the lengths of the third slot outer end and the fourth slot outer end of the second segmented coil unit is a short pitch X, the third slot inner portion of each of the first card issuing units and the third slot inner portion of one of the second card issuing units are arranged in two adjacent slots, and the fourth slot inner portion of each of the first card issuing units and the fourth slot inner portion of one of the second card issuing units are arranged in two adjacent slots;

[0022] When the first pitch is the short pitch X, the sum of the lengths of the first slot outer end portion and the second slot outer end portion of the first segmented coil unit is the long pitch Z, the sum of the lengths of the third slot outer end portion and the fourth slot outer end portion of the second segmented coil unit is the long pitch Z, the third slot inner portion of each of the first card issuing units is arranged in two adjacent slots with the third slot inner portion of one of the second card issuing units, and the fourth slot inner portion of each of the first card issuing units is arranged in two adjacent slots with the fourth slot inner portion of one of the second card issuing units.

[0023] Further, the number N of the first segmented coil units is: N=L*S, and the number M of the second segmented coil units is: M=2*S;

[0024] Wherein, L is the number of intermediate layers of the coil winding excluding the outermost layer and the innermost layer, S is the number of poles, and both L and S are even numbers.

[0025] Further, when L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8;

[0026] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit;

[0027] Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding;

[0028] When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6;

[0029] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit;

[0030] Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding;

[0031] When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4;

[0032] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit;

[0033] The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

[0034] Further, when L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8;

[0035] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0036] Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding;

[0037] When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6;

[0038] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0039] Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding;

[0040] When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4;

[0041] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0042] The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

[0043] Further, when L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8;

[0044] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0045] Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding;

[0046] When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6;

[0047] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0048] Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding;

[0049] When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4;

[0050] Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit;

[0051] The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

[0052] An embodiment of the present invention further provides a motor stator, comprising: a stator core and a motor winding as described in any of the above embodiments; the stator core is in a circular ring shape, and the inner side of the circular ring of the stator core has a plurality of teeth, and the plurality of teeth are evenly distributed along the circumference of the stator core; a slot is formed between two adjacent teeth; the stator core divides each slot into the first layer, the second layer, ..., the nth layer along the radial direction of the circular ring and pointing to the axial direction, n≥4, and n is an even number.

[0053] Further, the N first segmented coil units in the motor winding are arranged in sequence along the circumferential direction of the stator core, the first in-slot portion and the second in-slot portion of each of the first segmented coil units are located in the slot, and the first in-slot portion and the second in-slot portion are radially arranged in two adjacent layers of the slot;

[0054] The M second segmented coil units in the motor winding are arranged in sequence along the circumferential direction of the stator core, and the third in-slot portion and the fourth in-slot portion of each second segmented coil unit are located in the slot; and the third in-slot portion and the fourth in-slot portion are both arranged in the first layer of the slot, or the third in-slot portion and the fourth in-slot portion are both arranged in the nth layer of the slot.

[0055] The motor winding in the technical solution of the present invention arranges N first segmented coil units and M second segmented coil units in sequence along the circumferential direction, wherein the slot pitch of the second segmented coil unit is a short pitch X or a long pitch Z, and the third slot inner part and the fourth slot inner part of the second segmented coil unit are arranged on the same layer of the motor winding. By setting the outermost layer and the innermost layer of the motor winding as the second segmented coil unit, and the winding structure adopts a completely symmetrical structure on the magnetic circuit, the loop current generated by the asymmetric structure is eliminated, the busbars between phases are cancelled, the direct connection between phases is realized, and the branches and neutral points of each phase winding are set in any slot and any layer, which reduces the complexity of the manufacturing process, reduces the production cost, reduces the material cost, and improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] FIG1( a ) is a schematic structural diagram of a motor stator with eight parallel branches (the second segmented coil unit has a short pitch) provided in an embodiment of the present invention;

[0057] FIG1( b ) is a schematic structural diagram of a one-phase segmented coil of a motor winding with eight parallel branches (the second segmented coil unit has a short pitch) provided by an embodiment of the present invention;

[0058] FIG2( a ) is a schematic structural diagram of another motor stator with eight parallel branches (the second segmented coil unit has a long pitch) provided in an embodiment of the present invention;

[0059] FIG2( b ) is a schematic structural diagram of a one-phase segmented coil of another motor winding with eight parallel branches (the second segmented coil unit has a long pitch) provided in an embodiment of the present invention;

[0060] FIG3( a ) is a schematic structural diagram of a first segmented coil unit provided by an embodiment of the present invention, wherein the pitch of the first segmented coil unit is a full pitch;

[0061] FIG3( b ) is a schematic diagram of a second segmented coil unit having a short pitch structure provided by an embodiment of the present invention;

[0062] FIG3( c ) is a schematic diagram of a second segmented coil unit having a long pitch structure provided by an embodiment of the present invention;

[0063] FIG4( a ) is a schematic diagram of the structure of a motor stator with two parallel branches provided in an embodiment of the present invention;

[0064] FIG4( b ) is a schematic diagram of the structure of a three-phase segmented coil of a motor winding with two parallel branches provided by an embodiment of the present invention;

[0065] FIG4( c ) is a schematic diagram of the structure of a one-phase segmented coil of a motor winding with two parallel branches provided by an embodiment of the present invention;

[0066] FIG5( a ) is a schematic diagram of the structure of a motor stator with four parallel branches provided in an embodiment of the present invention;

[0067] FIG5( b ) is a schematic diagram of the structure of a three-phase segmented coil of a motor winding with four parallel branches provided by an embodiment of the present invention;

[0068] FIG5( c ) is a schematic diagram of the structure of a one-phase segmented coil of a motor winding with four parallel branches provided by an embodiment of the present invention;

[0069] Figure 6 is a partial schematic diagram of a motor winding provided by an embodiment of the present invention;

[0070] Figure 7 It is a structural schematic diagram of a single-phase segmented coil of another motor winding provided by an embodiment of the present invention;

[0071] FIG8( a ) is a partial schematic diagram of a second segmented coil unit of a motor winding with a short pitch provided by an embodiment of the present invention;

[0072] FIG8( b ) is a partial schematic diagram of a second segmented coil unit of a motor winding provided by an embodiment of the present invention having a long pitch;

[0073] FIG9( a ) is a schematic structural diagram of a first segmented coil unit with a long pitch provided by an embodiment of the present invention;

[0074] FIG9( b ) is a schematic structural diagram of yet another second segmented coil unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0075] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0076] An embodiment of the present invention provides a motor winding. FIG. 1(a) is a schematic diagram of the structure of a motor stator with eight parallel branches (the second segmented coil unit is a short pitch) provided in an embodiment of the present invention; FIG. 1(b) is a schematic diagram of the structure of a one-phase segmented coil of a motor winding with eight parallel branches (the second segmented coil unit is a short pitch) provided in an embodiment of the present invention; FIG. 2(a) is a schematic diagram of the structure of another motor stator with eight parallel branches (the second segmented coil unit is a long pitch) provided in an embodiment of the present invention; FIG. 2(b) is a schematic diagram of the structure of a one-phase segmented coil of another motor winding with eight parallel branches (the second segmented coil unit is a long pitch) provided in an embodiment of the present invention. FIG. 3(a) is a schematic diagram of the structure of a first segmented coil unit with a full pitch provided in an embodiment of the present invention. FIG. 3(b) is a schematic diagram of the structure of a second segmented coil unit with a short pitch provided in an embodiment of the present invention. FIG. 3(c) is a schematic diagram of the structure of a second segmented coil unit with a long pitch provided in an embodiment of the present invention.

[0077] Among them, in combination with Figure 1(a) and Figure 1(b), each phase segmented coil 10 in the three-phase segmented coil 10 of the motor winding 1 includes N first segmented coil units 30 and M second segmented coil units 40 (including 40-1 and 40-2 in Figure 1(b)), referring to Figure 1(b), the N first segmented coil units 30 are distributed in any layer of the motor winding 21 except the outermost layer and the innermost layer, and the M second segmented coil units 40 are distributed in the outermost layer and the innermost layer of the coil, wherein N≥2, M≥4, and N and M are both integers.

[0078] As shown in Fig. 3(a), any first segmented coil unit 30 includes: a first slot outer end 303-1, a first slot inner portion 301-1, a first slot outer turn portion 302, a second slot inner portion 301-2, and a second slot outer end 303-2 connected in sequence, wherein the first slot inner portion 301-1 and the second slot inner portion 301-2 are located in different slots. As shown in Fig. 3(b), any second segmented coil unit 40 includes: a third slot outer end 403-1, a third slot inner portion 401-1, a second slot outer turn portion 402, a fourth slot inner portion 401-2, and a fourth slot outer end 403-2 connected in sequence, wherein the third slot inner portion 401-1 and the fourth slot inner portion 401-2 are located in different slots.

[0079] Among them, the slot pitch of the first segmented coil unit 30 is a first pitch, wherein the first pitch is one of the following: full pitch Y, long pitch Z, short pitch X; the slot pitch of the second segmented coil unit 40 is a second pitch, wherein the second pitch is short pitch X or long pitch Z, and Z>Y>X.

[0080] N first segmented coil units 30 are arranged in sequence along the circumferential direction, and the first slot in-portion 301-1 and the second slot in-portion 301-2 of each first segmented coil unit 30 are distributed in two layers along the radial direction, and the first segmented coil unit 30 is radially arranged in any layer of the motor winding 21 except the outermost layer and the innermost layer;

[0081] The M second segmented coil units 40 are arranged in sequence along the circumferential direction, the third slot part 401-1 and the fourth slot part 401-2 of each second segmented coil unit 40 are distributed in the same layer along the radial direction, and the second segmented coil units 40 are radially arranged at the outermost layer and the innermost layer of the motor winding 21.

[0082] Optionally, the number of parallel branches of the motor winding 21 is equal to the number of motor poles, and the sum of the number of coil layers in two slots is an integer multiple of the number of parallel branches.

[0083] Exemplarily, Figures 1(a), 1(b), 2(a) and 2(b) are all motor windings 21 with eight parallel branches, and the number of slots per pole per phase is 2 (that is, every two adjacent slots occupy the same phase). The number of motor poles of the motor winding 21 is 8, the number of parallel branches 8 is equal to the number of motor poles 8, the sum of the number of coil layers in the two slots is 16, and the sum of the number of coil layers 16 is twice the number of parallel branches 8.

[0084] Fig. 4(a) is a schematic diagram of the structure of a motor stator with two parallel branches provided in an embodiment of the present invention. Fig. 4(b) is a schematic diagram of the structure of a three-phase segmented coil of a motor winding with two parallel branches provided in an embodiment of the present invention. Fig. 4(c) is a schematic diagram of the structure of a single-phase segmented coil of a motor winding with two parallel branches provided in an embodiment of the present invention. Fig. 5(a) is a schematic diagram of the structure of a motor stator with four parallel branches provided in an embodiment of the present invention. Fig. 5(b) is a schematic diagram of the structure of a three-phase segmented coil of a motor winding with four parallel branches provided in an embodiment of the present invention. Fig. 5(c) is a schematic diagram of the structure of a single-phase segmented coil of a motor winding with four parallel branches provided in an embodiment of the present invention.

[0085] Optionally, the number of parallel branches of the motor winding 21 is less than the number of motor poles, and the sum of the number of coil layers in two slots is an integer multiple of the number of parallel branches.

[0086] For example, Figure 4(a) , 4(b) Figure 4(c) shows a motor winding 21 with two parallel branches, and the number of motor poles of the motor winding 21 is 8, the number of parallel branches 2 is less than the number of motor poles 8, the sum of the number of coil layers in the two slots is 16, and the sum of the number of coil layers 16 is twice the number of parallel branches 8. Figure 4(c) shows that the motor winding 21 with two parallel branches is a motor winding with 2 slots per pole and per phase, that is, the two parallel branches U1 and U2 of the U phase of each pole occupy two adjacent slots.

[0087] As shown in Figure 4(a), the phase lead wires of the segmented coil 10 can be 51, 52, 53, 54, 55, 56, 57, and 58, and the neutral point can be 61, 62, 63, 64, 65, 66, 67, and 68. The phase lead wires of the segmented coil 10 can also be 61, 62, 63, 64, 65, 66, 67, and 68, and the neutral point is 51, 52, 53, 54, 55, 56, 57, and 58.

[0088] For example, Figure 5(a) , 5(b) Figure 5(c) shows a motor winding 21 with four parallel branches, and the number of motor poles of the motor winding 21 is 8, the number of parallel branches 4 is less than the number of motor poles 8, the sum of the number of coil layers in two slots is 16, and the sum of the number of coil layers 16 is twice the number of parallel branches 8. Figure 5(c) shows that the motor winding 21 with four parallel branches is a motor winding with 2 slots per pole per phase, that is, the four parallel branches U1, U2, U3 and U4 of the U phase of each pole occupy two adjacent slots.

[0089] As shown in Figure 5(a), the phase lead-out lines of the segmented coil 10 can be 51, 52, 53, 54, 55, 56, 57, 58, 59, 591, 592, and 593, and the neutral point can be 61, 62, 63, 64, 65, 66, 67, 68, 69, 691, 692, and 693. The phase lead-out lines of the segmented coil 10 can also be 61, 62, 63, 64, 65, 66, 67, 68, 69, 691, 692, and 693, and the neutral point is 51, 52, 53, 54, 55, 56, 57, 58, 59, 591, 592, and 593.

[0090] Optionally, the number of coil layers of the motor winding 21 along the radial direction is an even number greater than or equal to 4.

[0091] Optionally, as shown in Figure 3(a), the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 have opposite and far-away circumferential extension directions; as shown in Figure 3(b), the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 have the same circumferential extension direction.

[0092] In an embodiment of the present invention, referring to FIG. 3(a) and (b), a single hairpin unit (i.e., a first segmented coil unit 30 and a second segmented coil unit 40) constituting a motor winding 21 is arranged as a conductor structure with different pitches, and the second segmented coil unit 40 with a short pitch is arranged in the same layer and arranged in the outermost and innermost layers of the segmented coil 10, and the remaining hairpin units of the segmented coil 10 all adopt the first segmented coil unit 30 with a slot pitch of the first pitch and arranged in two layers.

[0093] As shown in Figure 1(b), the second segmented coil unit 40 includes a first card issuing unit 40-1 and a second card issuing unit 40-2; the outer ends of the slots of the first card issuing unit 40-1 and the second card issuing unit 40-2 have opposite circumferential extension directions, wherein the two outer ends of the slots of the first card issuing unit 40-1 extend in a counterclockwise direction, and the two outer ends of the slots of the second card issuing unit 40-2 extend in a clockwise direction.

[0094] In another embodiment of the present invention, referring to FIG. 3(a) and FIG. 3(c), a single hairpin unit (i.e., a first segmented coil unit 30 and a second segmented coil unit 40) constituting the motor winding 21 is arranged as a conductor structure with different pitches, and the second segmented coil unit 40 with a long pitch is arranged in the same layer and arranged in the outermost and innermost layers of the segmented coil 10, and the remaining hairpin units of the segmented coil 10 all adopt the first segmented coil unit 30 with a slot pitch of the first pitch and arranged in two layers.

[0095] As shown in Figure 2(b), the second segmented coil unit 40 includes a first card issuing unit 40-1 and a second card issuing unit 40-2; the outer ends of the slots of the first card issuing unit 40-1 and the second card issuing unit 40-2 have opposite circumferential extension directions, wherein the two outer ends of the slots of the first card issuing unit 40-1 extend in a counterclockwise direction, and the two outer ends of the slots of the second card issuing unit 40-2 extend in a clockwise direction.

[0096] Figure 6 It is a partial schematic diagram of a motor winding 21 provided in an embodiment of the present invention.

[0097] like Figure 6 As shown, the first card issuing unit 40-1 is arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the first card issuing unit 40-1 are distributed in the same layer; the second card issuing unit 40-2 is arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the second card issuing unit 40-2 are distributed in the same layer.

[0098] Alternatively, the first card issuing unit 40-1 is arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the first card issuing unit 40-1 are arranged in the same layer; the second card issuing unit 40-2 is arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the second card issuing unit 40-2 are arranged in the same layer. Obviously, the first card issuing unit 40-1 and the second card issuing unit 40-2 can be interchangeably arranged according to actual needs. No schematic diagram is given for this case, and it will not be repeated here.

[0099] Figure 7 It is a structural schematic diagram of a one-phase segmented coil of another motor winding provided by an embodiment of the present invention. FIG8(a) is a partial schematic diagram of a second segmented coil unit of a motor winding provided by an embodiment of the present invention with a short pitch; FIG8(b) is a partial schematic diagram of a second segmented coil unit of a motor winding provided by an embodiment of the present invention with a long pitch.

[0100] As shown in Figure 8(b), the first card issuing unit 40-1 is arranged at the outermost layer of the motor winding 21, and the third slot portion 401-1 and the fourth slot portion 401-2 of the first card issuing unit 40-1 are distributed in the same layer; the second card issuing unit 40-2 is arranged at the innermost layer of the motor winding 21, and the third slot portion 401-1 and the fourth slot portion 401-2 of the second card issuing unit 40-2 are distributed in the same layer.

[0101] Alternatively, the first card issuing unit 40-1 is arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the first card issuing unit 40-1 are arranged in the same layer; the second card issuing unit 40-2 is arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of the second card issuing unit 40-2 are arranged in the same layer. Obviously, the first card issuing unit 40-1 and the second card issuing unit 40-2 can be interchangeably arranged according to actual needs. No schematic diagram is given for this case, and it will not be repeated here.

[0102] Optionally, as shown in Figures 3(a), (b) and Figure 6 Or as shown in Figures 3(a), 3(c) and 8(b), when the first pitch is the full pitch Y, the sum of the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 is the full pitch Y, and the sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is the full pitch Y; the third slot inner portion 401-1 of each first card issuing unit 40-1 is arranged in the same slot as the third slot inner portion 401-1 of a second card issuing unit 40-2, and the fourth slot inner portion 401-2 of each first card issuing unit 40-1 is arranged in the same slot as the fourth slot inner portion 401-2 of a second card issuing unit 40-2.

[0103] Specifically, referring to Figures 3(a) and (b) or Figures 3(a) and 3(c), when the slot pitch of the first segmented coil unit 30 is the full pitch Y, the slot pitch between the two slot outer ends welded to each other in the segmented coil 10 is the full pitch, then the sum of the lengths between the two slot outer ends is the full pitch Y, and the full pitch Y is generally 6. By way of example, Figure 3 shows a schematic diagram when the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 are both Y / 2. Obviously, the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 can be set to 1 and 5, 2 and 4, etc., respectively, as needed, which will not be repeated here. The sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is the full pitch Y, then the distance between the two welded slot outer ends is the full pitch Y. Refer to Figure 6 At this time, the two in-slot parts of the first card issuing unit 40-1 and the second card issuing unit 40-2 of the second segmented coil unit 40 are arranged in the same slot in a one-to-one correspondence, that is, the third in-slot part 401-1 of the first card issuing unit 40-1 is arranged in the same slot as the third in-slot part 401-1 of the second card issuing unit 40-2, and the fourth in-slot part 401-2 of the first card issuing unit 40-1 is arranged in the same slot as the fourth in-slot part 401-2 of the second card issuing unit 40-2.

[0104] Fig. 9(a) is a schematic diagram of a structure of a first segmented coil unit with a long pitch provided by an embodiment of the present invention. Fig. 9(b) is a schematic diagram of a structure of a second segmented coil unit provided by an embodiment of the present invention.

[0105] As shown in Figures 9(a) and (b), when the first pitch is the long pitch Z, the sum of the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 is the short pitch X, the sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is the short pitch X, the third slot inner portion 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot inner portion 401-1 of a second card issuing unit 40-2, and the fourth slot inner portion 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot inner portion 401-2 of a second card issuing unit 40-2.

[0106] Specifically, referring to FIG. 9(a) and (b), when the slot pitch of the first segmented coil unit 30 is a long pitch Z, the slot pitch between the two slot outer ends welded to each other of the segmented coil 10 is a short pitch X, that is, the sum of the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 shown in FIG. 8(a) is the short pitch X, and the sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is also the short pitch X, then the distance between the two welded slot outer ends is the short pitch X. Figure 7 8(a), at this time, the two slot parts of the first card issuing unit 40-1 and the second card issuing unit 40-2 of the second segmented coil unit 40 are not arranged in the same slot in a one-to-one correspondence, but are arranged in two adjacent slots, that is, the third slot part 401-1 of the first card issuing unit 40-1 and the third slot part 401-1 of the second card issuing unit 40-2 are arranged in two adjacent slots, and the fourth slot part 401-2 of the first card issuing unit 40-1 and the fourth slot part 401-2 of the second card issuing unit 40-2 are arranged in two adjacent slots.

[0107] When the first pitch is the short pitch X, the sum of the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 is the long pitch Z, the sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is the long pitch Z, the third slot inner portion 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot inner portion 401-1 of a second card issuing unit 40-2, and the fourth slot inner portion 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot inner portion 401-2 of a second card issuing unit 40-2.

[0108] Obviously, just like when the slot pitch of the first segmented coil unit 30 is the long pitch Z, when the slot pitch of the first segmented coil unit 30 is the short pitch X, the slot pitch between the two welded slot outer ends of the segmented coil 10 is the long pitch Z, that is, the sum of the lengths of the first slot outer end 303-1 and the second slot outer end 303-2 of the first segmented coil unit 30 is the long pitch Z, and the sum of the lengths of the third slot outer end 403-1 and the fourth slot outer end 403-2 of the second segmented coil unit 40 is also the long pitch Z, then the distance between the two welded slot outer ends is the long pitch Z. At this time, the two slot parts of the first card issuing unit 40-1 and the second card issuing unit 40-2 of the second segmented coil unit 40 are not arranged in the same slot in a one-to-one correspondence, but are arranged in two adjacent slots, that is, the third slot part 401-1 of the first card issuing unit 40-1 and the third slot part 401-1 of the second card issuing unit 40-2 are arranged in two adjacent slots, and the fourth slot part 401-2 of the first card issuing unit 40-1 and the fourth slot part 401-2 of the second card issuing unit 40-2 are arranged in two adjacent slots.

[0109] Optionally, the number N of the first segmented coil units 30 is: N=L*S, and the number M of the second segmented coil units 40 is: M=2*S; wherein L is the number of intermediate layers of the coil winding excluding the outermost and innermost layers, S is the number of poles, and both L and S are even numbers.

[0110] The motor winding when the slot pitch of the first segmented coil unit 30 is the full pitch Y is specifically introduced below with reference to a specific embodiment.

[0111] For example, see Figures 1(a)-3 and Figure 6For a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 8, that is, L is 6, and the number of poles S is 8, the number N of the first segmented coil units 30 is 6*8=48, the first pitch is the full pitch Y, and the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0112] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in the same slot as the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in the same slot as the fourth slot part 401-2 of a second card issuing unit 40-2.

[0113] Among the 48 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 6th layer of the motor winding 21 and the second slot portions 301-2 are located at the 7th layer of the motor winding 21.

[0114] Optionally, in combination with FIG. 1(a) to FIG. 3 and Figure 6 On the basis of the above embodiment, the first segmented coil units 30 located at the 6th and 7th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 6, that is, L is 4, and the number of poles S is 8, the number N of the first segmented coil units 30 is 4*8=32, the first pitch is the full pitch Y, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0115] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in the same slot as the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in the same slot as the fourth slot part 401-2 of a second card issuing unit 40-2.

[0116] Among the 32 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21.

[0117] Optionally, in combination with FIG. 1(a) to FIG. 3 and Figure 6 On the basis of the above embodiment, the first segmented coil units 30 located at the 4th and 5th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 4, that is, L is 2, and the number of poles S is 8, the number N of the first segmented coil units 30 is 2*8=16, the first pitch is the full pitch Y, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0118] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in the same slot as the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in the same slot as the fourth slot part 401-2 of a second card issuing unit 40-2.

[0119] The first in-slot portions 301 - 1 of the 16 first segmented coil units 30 are located at the second layer of the motor winding 21 , and the second in-slot portions 301 - 2 are located at the third layer of the motor winding 21 .

[0120] As shown in Figure 1(a) and Figure 2(a), the phase lead-out lines of the segmented coil 10 can be 51, 52, 53, 54, 55, 56, 57, and 58, and the neutral point can be 61, 62, 63, 64, 65, 66, 67, and 68. The phase lead-out lines of the segmented coil 10 can also be 61, 62, 63, 64, 65, 66, 67, and 68, and the neutral point is 51, 52, 53, 54, 55, 56, 57, and 58.

[0121] The motor winding when the slot pitch of the first segmented coil unit 30 is the long pitch Z and the short pitch X is specifically introduced below with reference to the embodiments.

[0122] For example, see Figure 7 As shown in Figure 8(a), for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 8, that is, L is 6, and the number of poles S is 8, the number N of the first segmented coil units 30 is 6*8=48, the first pitch is the long pitch Z, and the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0123] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0124] Among the 48 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 6th layer of the motor winding 21 and the second slot portions 301-2 are located at the 7th layer of the motor winding 21.

[0125] Alternatively, see Figure 7 As shown in Figure 8(a), on the basis of the above embodiment, the first segmented coil units 30 located at the 6th and 7th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 6, that is, L is 4, and the number of poles S is 8, the number N of the first segmented coil units 30 is 4*8=32, the first pitch is the long pitch Z, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0126] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0127] Among the 32 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21.

[0128] Alternatively, see Figure 78(a), on the basis of the above embodiment, the first segmented coil units 30 located at the 4th and 5th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 4, that is, L is 2, and the number of poles S is 8, the number N of the first segmented coil units 30 is 2*8=16, the first pitch is the long pitch Z, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0129] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0130] The first in-slot portions 301 - 1 of the 16 first segmented coil units 30 are located at the second layer of the motor winding 21 , and the second in-slot portions 301 - 2 are located at the third layer of the motor winding 21 .

[0131] Exemplarily, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 8, that is, L is 6, and the number of poles S is 8, the number N of first segmented coil units 30 is 6*8=48, the first pitch is the short pitch X, and the number M of second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card-issuing units 40-1 and 8 second card-issuing units 40-2.

[0132] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0133] Among the 48 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 6th layer of the motor winding 21 and the second slot portions 301-2 are located at the 7th layer of the motor winding 21.

[0134] Optionally, based on the above embodiment, the first segmented coil units 30 located at the 6th and 7th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 6, that is, L is 4, and the number of poles S is 8, the number N of the first segmented coil units 30 is 4*8=32, the first pitch is the short pitch X, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card issuing units 40-1 and 8 second card issuing units 40-2.

[0135] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0136] Among the 32 first segmented coil units 30, the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 2nd layer of the motor winding 21 and the second slot portions 301-2 are located at the 3rd layer of the motor winding 21; the first slot portions 301-1 of 16 first segmented coil units 30 are located at the 4th layer of the motor winding 21 and the second slot portions 301-2 are located at the 5th layer of the motor winding 21.

[0137] Optionally, based on the above embodiment, the first segmented coil units 30 located at the 4th and 5th layers of the motor winding 21 are removed, that is, for a single-phase segmented coil, when the number of coil layers of the motor winding 21 is 4, that is, L is 2, and the number of poles S is 8, the number N of the first segmented coil units 30 is 2*8=16, the first pitch is the short pitch X, the number M of the second segmented coil units 40 is 2*8=16, and the 16 second segmented coil units 40 include 8 first card issuing units 40-1 and 8 second card issuing units 40-2.

[0138] Among them, 8 first card issuing units 40-1 are arranged at the outermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each first card issuing unit 40-1 are both located at the outermost layer of the motor winding 21; 8 second card issuing units 40-2 are arranged at the innermost layer of the motor winding 21, and the third slot part 401-1 and the fourth slot part 401-2 of each second card issuing unit 40-2 are both located at the innermost layer of the motor winding 21; the third slot part 401-1 of each first card issuing unit 40-1 is arranged in two adjacent slots with the third slot part 401-1 of a second card issuing unit 40-2, and the fourth slot part 401-2 of each first card issuing unit 40-1 is arranged in two adjacent slots with the fourth slot part 401-2 of a second card issuing unit 40-2.

[0139] The first in-slot portions 301 - 1 of the 16 first segmented coil units 30 are located at the second layer of the motor winding 21 , and the second in-slot portions 301 - 2 are located at the third layer of the motor winding 21 .

[0140] The embodiment of the present invention further provides a motor stator, see FIG1(a), comprising: a stator iron 20 and a motor winding 21 as described in any of the above embodiments; the stator core 20 is annular, and the inner side of the annular ring of the stator core 20 has a plurality of teeth 22, and the plurality of teeth 22 are evenly distributed along the circumference of the stator core; a slot 23 is formed between two adjacent teeth 22; the stator core 20 divides each slot 23 into the first layer, the second layer, ..., the nth layer along the radial direction of the annular ring and pointing to the axial direction, where n≥4, and n is an even number;

[0141] Optionally, the N first segmented coil units 30 in the motor winding 21 are arranged sequentially along the circumference of the stator core 20, and the first in-slot portion 301-1 and the second in-slot portion 301-2 of each first segmented coil unit 30 are located in the slot 23, and the first in-slot portion 301-1 and the second in-slot portion 301-2 are radially arranged in two adjacent layers of the slot 23.

[0142] The M second segmented coil units 40 in the motor winding 21 are arranged in sequence along the circumferential direction of the stator core 20, and the third slot portion 401-1 and the fourth slot portion 401-2 of each second segmented coil unit 40 are located in the slot 23; and the third slot portion 401-1 and the fourth slot portion 401-2 are both arranged in the first layer of the slot 23, or, the third slot portion 401-1 and the fourth slot portion 401-2 are both arranged in the nth layer of the slot 23.

[0143] The motor can be a permanent magnet motor or an asynchronous AC motor. The motor stator provided by the embodiment of the present invention includes the motor winding in the above embodiment, so the motor stator provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0144] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0145] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A motor winding, characterized in that: include: Three-phase segmented coil; The segmented coil of each phase includes N first segmented coil units and M second segmented coil units, wherein N≥2, M≥4, and N and M are both integers; Any of the first segmented coil units comprises: a first slot outer end portion, a first slot inner portion, a first slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, wherein the first slot inner portion and the second slot inner portion are located in different slots; Any of the second segmented coil units comprises: a third slot outer end portion, a third slot inner portion, a second slot outer turning portion, a fourth slot inner portion and a fourth slot outer end portion connected in sequence, wherein the third slot inner portion and the fourth slot inner portion are located in different slots; The slot pitch of the first segmented coil unit is a first pitch, wherein the first pitch is one of the following: full pitch Y, long pitch Z, short pitch X; the slot pitch of the second segmented coil unit is a second pitch, wherein the second pitch is short pitch X or long pitch Z, and Z>Y>X; N first segmented coil units are arranged in sequence along the circumferential direction, the first slot inner part and the second slot inner part of each first segmented coil unit are distributed in two layers along the radial direction, and the first segmented coil unit is arranged in any layer of the motor winding except the outermost layer and the innermost layer along the radial direction; The M second segmented coil units are sequentially arranged along the circumferential direction, the third slot inner portion and the fourth slot inner portion of each second segmented coil unit are distributed in the same layer along the radial direction, and the second segmented coil units are radially arranged at the outermost layer and the innermost layer of the motor winding; The number of coil layers of the motor winding in the radial direction is an even number greater than or equal to 4; The first slot outer end portion and the second slot outer end portion of the first segmented coil unit extend in opposite directions and are far away from each other along the circumferential direction; The third slot outer end portion and the fourth slot outer end portion of the second segment coil unit extend in the same circumferential direction.

2. The motor winding according to claim 1, characterized in that: The number of parallel branches of the motor winding is equal to the number of motor poles, and the sum of the number of coil layers in the two slots is an integer multiple of the number of parallel branches.

3. The motor winding according to claim 1, characterized in that: The number of parallel branches of the motor winding is less than the number of motor poles, and the sum of the number of coil layers in the two slots is an integer multiple of the number of parallel branches.

4. The motor winding according to claim 1, characterized in that: The second segmented coil unit includes a first card issuing unit and a second card issuing unit; the outer ends of the slots of the first card issuing unit and the second card issuing unit extend in opposite directions along the circumferential direction, wherein the two outer ends of the slots of the first card issuing unit extend in a counterclockwise direction along the circumferential direction, and the two outer ends of the slots of the second card issuing unit extend in a clockwise direction along the circumferential direction; The first card issuing unit is arranged at the outermost layer of the motor winding, and the third slot inner part and the fourth slot inner part of the first card issuing unit are distributed in the same layer; the second card issuing unit is arranged at the innermost layer of the motor winding, and the third slot inner part and the fourth slot inner part of the second card issuing unit are distributed in the same layer; Alternatively, the first card issuing unit is arranged at the innermost layer of the motor winding, and the third slot portion and the fourth slot portion of the first card issuing unit are distributed in the same layer; the second card issuing unit is arranged at the outermost layer of the motor winding, and the third slot portion and the fourth slot portion of the second card issuing unit are distributed in the same layer.

5. The motor winding according to claim 4, characterized in that: When the first pitch is the full pitch Y, the sum of the lengths of the first slot outer end and the second slot outer end of the first segmented coil unit is the full pitch Y, and the sum of the lengths of the third slot outer end and the fourth slot outer end of the second segmented coil unit is the full pitch Y; the third slot inner portion of each of the first card issuing units is arranged in the same slot as the third slot inner portion of one of the second card issuing units, and the fourth slot inner portion of each of the first card issuing units is arranged in the same slot as the fourth slot inner portion of one of the second card issuing units; When the first pitch is a long pitch Z, the sum of the lengths of the first slot outer end and the second slot outer end of the first segmented coil unit is a short pitch X, the sum of the lengths of the third slot outer end and the fourth slot outer end of the second segmented coil unit is a short pitch X, the third slot inner portion of each of the first card issuing units and the third slot inner portion of one of the second card issuing units are arranged in two adjacent slots, and the fourth slot inner portion of each of the first card issuing units and the fourth slot inner portion of one of the second card issuing units are arranged in two adjacent slots; When the first pitch is the short pitch X, the sum of the lengths of the first slot outer end portion and the second slot outer end portion of the first segmented coil unit is the long pitch Z, the sum of the lengths of the third slot outer end portion and the fourth slot outer end portion of the second segmented coil unit is the long pitch Z, the third slot inner portion of each of the first card issuing units is arranged in two adjacent slots with the third slot inner portion of one of the second card issuing units, and the fourth slot inner portion of each of the first card issuing units is arranged in two adjacent slots with the fourth slot inner portion of one of the second card issuing units.

6. The motor winding according to claim 4, characterized in that: The number N of the first segmented coil units is: N=L*S, and the number M of the second segmented coil units is: M=2*S; Wherein, L is the number of intermediate layers of the coil winding excluding the outermost layer and the innermost layer, S is the number of poles, and both L and S are even numbers.

7. The motor winding according to claim 6, characterized in that: When L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit; Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding; When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit; Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is the full pitch Y, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in the same slot as the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in the same slot as the fourth slot part of one second card issuing unit; The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

8. The motor winding according to claim 6, characterized in that: When L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding; When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is the long pitch Z, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

9. The motor winding according to claim 6, characterized in that: When L is 6 layers and S is 8 poles, the number N of the first segmented coil units is 48, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 8; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; Among the 48 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the sixth layer of the motor winding and the second slot parts are located at the seventh layer of the motor winding; When L is 4 layers and S is 8 poles, the number N of the first segmented coil units is 32, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 6; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; Among the 32 first segmented coil units, the first slot parts of 16 of the first segmented coil units are located at the second layer of the motor winding and the second slot parts are located at the third layer of the motor winding; the first slot parts of 16 of the first segmented coil units are located at the fourth layer of the motor winding and the second slot parts are located at the fifth layer of the motor winding; When L is 2 layers and S is 8 poles, the number N of the first segmented coil units is 16, the first pitch is a short pitch X, the number M of the second segmented coil units is 16, the 16 second segmented coil units include 8 first card issuing units and 8 second card issuing units, and the number of coil layers of the motor winding is 4; Among them, 8 first card issuing units are arranged at the outermost layer of the motor winding, and the third slot part and the fourth slot part of each first card issuing unit are both located at the outermost layer of the motor winding; 8 second card issuing units are arranged at the innermost layer of the motor winding, and the third slot part and the fourth slot part of each second card issuing unit are both located at the innermost layer of the motor winding; the third slot part of each first card issuing unit is arranged in two adjacent slots with the third slot part of one second card issuing unit, and the fourth slot part of each first card issuing unit is arranged in two adjacent slots with the fourth slot part of one second card issuing unit; The first slot portions of the 16 first segmented coil units are located at the second layer of the motor winding, and the second slot portions are located at the third layer of the motor winding.

10. A motor stator, characterized in that: include: A stator core and a motor winding as claimed in any one of claims 1 to 9; the stator core is in a circular ring shape, the inner side of the circular ring of the stator core has a plurality of teeth, and the plurality of teeth are evenly distributed along the circumference of the stator core; a slot is formed between two adjacent teeth; the stator core divides each slot into the first layer, the second layer, ..., the nth layer along the radial direction of the circular ring and pointing to the axial direction, n ≥ 4, and n is an even number.

11. The motor stator according to claim 10, characterized in that: The N first segmented coil units in the motor winding are arranged in sequence along the circumferential direction of the stator core, the first in-slot portion and the second in-slot portion of each first segmented coil unit are located in the slot, and the first in-slot portion and the second in-slot portion are arranged in two adjacent layers of the slot in the radial direction; The M second segmented coil units in the motor winding are arranged in sequence along the circumferential direction of the stator core, and the third in-slot portion and the fourth in-slot portion of each second segmented coil unit are located in the slot; and the third in-slot portion and the fourth in-slot portion are both arranged in the first layer of the slot, or the third in-slot portion and the fourth in-slot portion are both arranged in the nth layer of the slot.

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