Motor stator and hairpin motor

Abstract

The present invention discloses a motor stator and a hairpin motor. The motor stator includes a motor winding and an integrated stator core. The motor winding includes a three-phase coil group, wherein each phase coil group includes: a first coil group, a second coil group, and a third coil group. The first coil group is arranged in the first layer of the motor winding, the second coil group is arranged in the middle layer of the motor winding, and the third coil group is arranged in the nth layer of the motor winding; alternatively, the first coil group is arranged in the nth layer of the motor winding, the second coil group is arranged in the middle layer of the motor winding, and the third coil group is arranged in the first layer of the motor winding. By using a single conductor to form the motor winding, not only is the busbar between each phase eliminated, enabling direct connection within each phase, but also the lead wire can be arranged in any slot or any layer, reducing production costs and improving 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 stator and a hairpin motor. Background Art

[0002] The stator winding includes a plurality of hairpin coils. The plurality of hairpin coils are inserted into the slots of the stator core in a certain arrangement manner to form the windings of the required single-phase motor or polyphase motor. In the prior art, there are many types of hairpin coils used, and the arrangement is complex. A large number of busbars and busbars are required to connect the branches and neutral points of each phase winding, 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 stator and a hairpin motor. The motor winding is formed by a single conductor, which not only cancels the busbars between phases, realizes direct connection between phases, but also enables the lead wire to be set in any slot and any layer, reducing the production cost and improving the processing efficiency.

[0004] The present invention provides a motor stator, including a motor winding and an integral stator core; the stator core includes N tooth parts, and the N tooth parts extend radially inward and are evenly distributed along the circumferential direction; adjacent two tooth parts form a slot, the number of slots is N, N is a multiple of 3, and N is an even number; the stator core divides each slot into the first layer, the second layer,..., the x layer, the x + 1 layer,..., the n layer along the radial direction and pointing to the axis direction, 1 < x < n, n ≥ 4, and n is an even number;

[0005] The motor winding includes three-phase coil groups. Among them, each phase coil group includes: a first coil group, a second coil group, and a third coil group; the first coil group is arranged on the first layer of the motor winding, the second coil group is arranged on the middle layer of the motor winding, and the third coil group is arranged on the nth layer of the motor winding; or, the first coil group is arranged on the nth layer of the motor winding, the second coil group is arranged on the middle layer of the motor winding, and the third coil group is arranged on the first layer of the motor winding.

[0006] Further, the first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit, each of which includes a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence, and the first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch; the first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots;

[0007] The second coil assembly includes a plurality of second segmented coil units, each of which includes a third card-isolating unit and a fourth card-isolating unit. The third card-isolating unit and the fourth card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The third card-isolating unit and the fourth card-isolating unit both have a full pitch. The first slot-inner portion of the third card-isolating unit and the first slot-inner portion of the fourth card-isolating unit are arranged at the xth layer in two adjacent slots, and the second slot-inner portion of the third card-isolating unit and the second slot-inner portion of the fourth card-isolating unit are arranged at the x+1th layer in two adjacent slots.

[0008] The third coil group includes a plurality of third segmented coil units, each of which includes a fifth card issuing unit and a sixth card issuing unit. The fifth card issuing unit and the sixth card issuing unit both include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence. The fifth card issuing unit and the sixth card issuing unit both have a full pitch; the first slot inner portion of the fifth card issuing unit and the first slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots, and the second slot inner portion of the fifth card issuing unit and the second slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

[0009] Further, the first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at the other axial end of the stator core.

[0010] Further, the first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit, each of which includes a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence, and the first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch; the first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots;

[0011] The second coil assembly includes a plurality of second segmented coil units, each of which includes a seventh card-isolating unit and an eighth card-isolating unit. The seventh card-isolating unit and the eighth card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The seventh card-isolating unit has a long pitch, and the eighth card-isolating unit has a short pitch. The first slot-inner portion of the seventh card-isolating unit and the first slot-inner portion of the eighth card-isolating unit are arranged at the xth layer in two adjacent slots, and the second slot-inner portion of the seventh card-isolating unit and the second slot-inner portion of the eighth card-isolating unit are arranged at the x+1th layer in two adjacent slots.

[0012] The third coil group includes a plurality of third segmented coil units, each of which includes a fifth card issuing unit and a sixth card issuing unit. The fifth card issuing unit and the sixth card issuing unit both include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence. The fifth card issuing unit and the sixth card issuing unit both have a full pitch; the first slot inner portion of the fifth card issuing unit and the first slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots, and the second slot inner portion of the fifth card issuing unit and the second slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

[0013] Further, the first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at the other axial end of the stator core.

[0014] Furthermore, the first slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a-th slot, the first slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+1-th slot, the first slot portion of the fifth card issuing unit is arranged at the nth layer or the 1st layer in the a-th slot, and the first slot portion of the sixth card issuing unit is arranged at the nth layer or the 1st layer in the a+1-th slot;

[0015] The second slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a+7th slot, the second slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+6th slot, the second slot portion of the fifth card issuing unit is arranged at the nth layer or the 1st layer in the a+6th slot, and the second slot portion of the sixth card issuing unit is arranged at the nth layer or the 1st layer in the a+7th slot.

[0016] Further, the first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit, wherein the first card-isolating unit and the second card-isolating unit each include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, and the first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch; the first slot inner portion of the first card-isolating unit and the first slot inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot inner portion of the first card-isolating unit and the second slot inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots;

[0017] The second coil assembly includes a plurality of second segmented coil units, each of which includes a third card-isolating unit and a fourth card-isolating unit. The third card-isolating unit and the fourth card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The third card-isolating unit and the fourth card-isolating unit both have a full pitch. The first slot-inner portion of the third card-isolating unit and the first slot-inner portion of the fourth card-isolating unit are arranged at the xth layer in two adjacent slots, and the second slot-inner portion of the third card-isolating unit and the second slot-inner portion of the fourth card-isolating unit are arranged at the x+1th layer in two adjacent slots.

[0018] The third coil group includes a plurality of third segmented coil units, each of the third segmented coil units includes a ninth card issuing unit and a tenth card issuing unit, the ninth card issuing unit and the tenth card issuing unit each include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, the ninth card issuing unit and the tenth card issuing unit both having a full pitch; the second slot inner portion of the ninth card issuing unit and the first slot inner portion of the tenth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

[0019] Further, the first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at the other axial end of the stator core.

[0020] Further, the first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit, each of which includes a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence, and the first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch; the first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots;

[0021] The second coil assembly includes a plurality of second segmented coil units, each of which includes a seventh card-isolating unit and an eighth card-isolating unit. The seventh card-isolating unit and the eighth card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The seventh card-isolating unit has a long pitch, and the eighth card-isolating unit has a short pitch. The first slot-inner portion of the seventh card-isolating unit and the first slot-inner portion of the eighth card-isolating unit are arranged at the xth layer in two adjacent slots, and the second slot-inner portion of the seventh card-isolating unit and the second slot-inner portion of the eighth card-isolating unit are arranged at the x+1th layer in two adjacent slots.

[0022] The third coil group includes a plurality of third segmented coil units, each of the third segmented coil units includes a ninth card issuing unit and a tenth card issuing unit, the ninth card issuing unit and the tenth card issuing unit each include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, the ninth card issuing unit and the tenth card issuing unit both having a full pitch; the second slot inner portion of the ninth card issuing unit and the first slot inner portion of the tenth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

[0023] Further, the first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at the other axial end of the stator core.

[0024] Furthermore, the first slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a-th slot, the first slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+1-th slot, the first slot portion of the ninth card issuing unit is arranged at the nth layer or the 1st layer in the a+1-th slot, and the first slot portion of the tenth card issuing unit is arranged at the nth layer or the 1st layer in the a+6-th slot;

[0025] The second slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a+7th slot, the second slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+6th slot, the second slot portion of the ninth card issuing unit is arranged at the nth layer or the 1st layer in the a+7th slot, and the second slot portion of the tenth card issuing unit is arranged at the nth layer or the 1st layer in the a+12th slot.

[0026] The present invention further provides a card issuing motor, characterized in that the card issuing motor comprises the motor stator described in any one of the above embodiments.

[0027] Furthermore, the card issuing motor is a parallel card issuing motor or a series card issuing motor.

[0028] The present invention discloses a motor stator and a hairpin motor, wherein the motor stator includes a motor winding and an integrated stator core. The motor winding includes a three-phase coil group, wherein each phase coil group includes: a first coil group, a second coil group, and a third coil group; the first coil group is arranged on the first layer of the motor winding, the second coil group is arranged on the middle layer of the motor winding, and the third coil group is arranged on the nth layer of the motor winding; or, the first coil group is arranged on the nth layer of the motor winding, the second coil group is arranged on the middle layer of the motor winding, and the third coil group is arranged on the first layer of the motor winding. By using a single conductor to form the motor winding, not only is the busbar between phases eliminated, achieving direct connection within each phase, but also the lead wire can be arranged in any slot and any layer, thereby reducing production costs and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural diagram of a motor stator provided by an embodiment of the present invention;

[0030] Figure 2 is a structural diagram of a motor winding provided by an embodiment of the present invention;

[0031] Figure 3 is a structural diagram of a single-phase coil assembly provided by an embodiment of the present invention;

[0032] FIG4( a ) is a structural diagram of a first segmented coil unit 210 provided in an embodiment of the present invention;

[0033] FIG4( b ) is a structural diagram of a second segmented coil unit 220 provided in an embodiment of the present invention;

[0034] FIG4( c ) is a structural diagram of a third segmented coil unit 230 provided in an embodiment of the present invention;

[0035] FIG4( d ) is a structural diagram of another second segmented coil unit 220 provided in an embodiment of the present invention;

[0036] Figure 5 is a structural diagram of another motor stator provided by an embodiment of the present invention;

[0037] Figure 6 is a structural diagram of another motor winding provided by an embodiment of the present invention;

[0038] Figure 7 This is a structural diagram of another single-phase coil assembly provided by an embodiment of the present invention;

[0039] Figure 8 is a partial enlarged view of the motor winding provided by an embodiment of the present invention;

[0040] Figure 9It is a structural diagram of another third segmented coil unit 230 provided by an embodiment of the present invention;

[0041] Figure 10 It is a structural diagram of another motor stator provided by an embodiment of the present invention;

[0042] Figure 11 It is a structural diagram of another motor winding provided by an embodiment of the present invention;

[0043] Figure 12 It is a structural diagram of another one-phase coil group provided by an embodiment of the present invention;

[0044] Figure 13 It is a partial enlarged view of another motor winding provided by an embodiment of the present invention. <s Specific embodiments

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all the structures.

[0046] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to limit a specific order. Each of the following embodiments of the present invention can be executed independently, and the embodiments can also be combined with each other. The embodiments of the present invention do not make specific restrictions on this.

[0047] The present invention provides a motor stator. Figure 1 It is a structural diagram of a motor stator provided by an embodiment of the present invention. Figure 2 It is a structural diagram of a motor winding provided by an embodiment of the present invention. [[ID=Z]] Figure 3 It is a structural diagram of a one-phase coil group provided by an embodiment of the present invention.

[0048] Among them, in combination with Figure 1-Figure 3 , the motor stator includes a motor winding 10 and an integral stator core 20; the stator core includes N tooth portions 22, and the N tooth portions 22 extend radially inward and are evenly distributed along the circumferential direction; adjacent two tooth portions 22 form a slot 23, the number of slots 23 is N, N is a multiple of 3, and N is an even number; the stator core 20 divides each slot 23 into the first layer, the second layer,..., the x layer, the x + 1 layer,..., the n layer along the radial direction and pointing to the axis direction, 1 < x < n, n ≥ 4, and n is an even number.

[0049] The motor winding 10 includes a three-phase coil group, wherein each phase coil group includes: a first coil group 110, a second coil group 120 and a third coil group 130; the first coil group 110 is arranged on the first layer of the motor winding 10, the second coil group 120 is arranged on the middle layer of the motor winding 10, and the third coil group 130 is arranged on the nth layer of the motor winding 10; or, the first coil group 110 is arranged on the nth layer of the motor winding 10, the second coil group 120 is arranged on the middle layer of the motor winding 10, and the third coil group 130 is arranged on the first layer of the motor winding 10.

[0050] Specifically, the motor winding 10 includes three-phase coil groups, namely U phase, V phase and W phase. Each phase coil group includes three types of coil groups, namely the first coil group 110, the second coil group 120 and the third coil group 130. For example, the outermost layer of the motor winding is called the first layer, and the innermost layer of the motor winding is the nth layer. Since the first coil group 110 and the third coil group 130 are both arranged in the same layer, the placement positions can also be interchanged, that is, the first coil group 110 is placed in the outermost layer (first layer) of the motor winding, and the third coil group 130 is placed in the innermost layer (nth layer) of the motor winding, or the first coil group 110 is placed in the innermost layer (nth layer) of the motor winding, and the third coil group 130 is placed in the outermost layer (first layer) of the motor winding. As Figure 2 , which is a schematic diagram showing that the first coil group 110 is placed in the innermost layer of the motor winding 10 , and the third coil group 130 is placed in the outermost layer of the motor winding 10 .

[0051] Figure 4(a) is a structural diagram of a first segmented coil unit 210 provided in an embodiment of the present invention. Figure 4(b) is a structural diagram of a second segmented coil unit 220 provided in an embodiment of the present invention. Figure 4(c) is a structural diagram of a third segmented coil unit 230 provided in an embodiment of the present invention.

[0052] Optionally, referring to Figure 4(a), the first coil group 110 includes a plurality of first segmented coil units 210, each first segmented coil unit 210 includes a first card issuing unit 41 and a second card issuing unit 42, the first card issuing unit 41 and the second card issuing unit 42 are concentric structures, the first card issuing unit 41 and the second card issuing unit 42 both include a first slot outer end 50, a first slot inner part 51, a slot outer turning part 53, a second slot inner part 52 and a second slot outer end 54 connected in sequence, the first slot outer end 50 and the second slot outer end 54 are in the same direction, specifically, the concentric structure means that the slot outer turning parts 53 of the two card issuing units are adjacently arranged, rather than cross-twisted.

[0053] The first card issuing unit 41 has a long pitch, and the second card issuing unit 42 has a short pitch. The long pitch refers to a slot pitch of 7, and the short pitch refers to a slot pitch of 5. The first in-slot portion 51 of the first card issuing unit 41 and the first in-slot portion 51 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots, and the second in-slot portion 52 of the first card issuing unit 41 and the second in-slot portion 52 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots. That is, the two in-slot portions of the first card issuing unit 41 and the two in-slot portions of the second card issuing unit 42 are both arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0054] 4( b), the second coil assembly 120 includes a plurality of second segmented coil units 220, each of which includes a third card issuing unit 43 and a fourth card issuing unit 44. The third card issuing unit 43 and the fourth card issuing unit 44 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end 54 connected in sequence. The first slot outer end 50 and the second slot outer end 54 are opposite, and the third card issuing unit 43 and the fourth card issuing unit are connected in sequence. 44 are all full pitches, and the full pitch refers to a slot pitch of 6; the first in-slot portion 51 of the third card issuing unit 43 and the first in-slot portion 51 of the fourth card issuing unit 44 are arranged in the xth layer in two adjacent slots, and the second in-slot portion 52 of the third card issuing unit 43 and the second in-slot portion 52 of the fourth card issuing unit 44 are arranged in the x+1th layer in two adjacent slots, that is, the third card issuing unit 43 and the fourth card issuing unit 44 are both arranged in the middle layer of the motor winding, and the two in-slot portions of each card issuing unit are arranged in two adjacent layers.

[0055] 4( c ), the third coil assembly 130 includes a plurality of third segmented coil units 230, each of which includes a fifth card issuing unit 45 and a sixth card issuing unit 46. The fifth card issuing unit 45 and the sixth card issuing unit 46 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end 54 connected in sequence. The first slot outer end 50 and the second slot outer end 54 are in the same direction. The fifth card issuing unit 45 and the sixth card issuing unit 46 are connected in sequence. 46 are all full pitches; the first in-slot portion 51 of the fifth card issuing unit 45 and the first in-slot portion 51 of the sixth card issuing unit 46 are arranged in the nth layer or the 1st layer in two adjacent slots, and the second in-slot portion 52 of the fifth card issuing unit 45 and the second in-slot portion 52 of the sixth card issuing unit 46 are arranged in the nth layer or the 1st layer in two adjacent slots, that is, the two in-slot portions of the fifth card issuing unit 45 and the two in-slot portions of the sixth card issuing unit 46 are all arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0056] Optionally, the first slot outer end portion 50 and the second slot outer end portion 54 of the first card issuing unit 41, the second card issuing unit 42, the third card issuing unit 43, the fourth card issuing unit 44, the fifth card issuing unit 45 and the sixth card issuing unit 46 are all arranged at one axial end of the stator core 20, and the slot outer turning portion 53 of the first card issuing unit 41, the second card issuing unit 42, the third card issuing unit 43, the fourth card issuing unit 44, the fifth card issuing unit 45 and the sixth card issuing unit 46 are all arranged at the other axial end of the stator core 20.

[0057] It should be noted that Figure 1-Figure 3 The motor stator and motor winding structure shown in FIG4 is composed of a first segmented coil unit 210 shown in FIG4(a), a second segmented coil unit 220 shown in FIG4(b), and a third segmented coil unit 230 shown in FIG4(c), and the coil units are connected in series. Obviously, the coil units can also be connected in parallel, which will not be described in detail here.

[0058] FIG4( d ) is a structural diagram of another second segmented coil unit 220 provided in an embodiment of the present invention. Figure 5 This is a structural diagram of another motor stator provided by an embodiment of the present invention. Figure 6 This is a structural diagram of another motor winding provided by an embodiment of the present invention. Figure 7 This is a structural diagram of another single-phase coil group provided by an embodiment of the present invention.

[0059] Optionally, referring to Figure 4(a), the first coil group 110 includes a plurality of first segmented coil units 210, each first segmented coil unit 210 includes a first card issuing unit 41 and a second card issuing unit 42, the first card issuing unit 41 and the second card issuing unit 42 are concentric structures, the first card issuing unit 41 and the second card issuing unit 42 both include a first slot outer end 50, a first slot inner part 51, a slot outer turning part 53, a second slot inner part 52 and a second slot outer end 54 connected in sequence, the first slot outer end 50 and the second slot outer end 54 are in the same direction, specifically, the concentric structure means that the slot outer turning parts 53 of the two card issuing units are adjacently arranged, rather than cross-twisted.

[0060] Among them, the first card issuing unit 41 has a long pitch, and the second card issuing unit 42 has a short pitch, the long pitch refers to the slot pitch of 7, and the short pitch refers to the slot pitch of 5; the first in-slot part 51 of the first card issuing unit 41 and the first in-slot part 51 of the second card issuing unit 42 are arranged in the 1st layer or the nth layer in two adjacent slots, and the second in-slot part 52 of the first card issuing unit 41 and the second in-slot part 52 of the second card issuing unit 42 are arranged in the 1st layer or the nth layer in two adjacent slots; that is, the two in-slot parts of the first card issuing unit 41 and the two in-slot parts of the second card issuing unit 42 are both arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0061] 4( d ), the second coil assembly 120 includes a plurality of second segmented coil units 220, each of which includes a seventh card-isolating unit 47 and an eighth card-isolating unit 48. The seventh card-isolating unit 47 and the eighth card-isolating unit 48 are concentric structures, the seventh card-isolating unit 47 is a long pitch, and the eighth card-isolating unit 48 is a short pitch. The seventh card-isolating unit 47 and the eighth card-isolating unit 48 each include a first slot outer end portion 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end portion connected in sequence. Part 54, wherein the first slot outer end portion 50 and the second slot outer end portion 54 are opposite to each other, the first slot portion 51 of the seventh card issuing unit 47 and the first slot portion 51 of the eighth card issuing unit 48 are arranged at the xth layer in two adjacent slots, the second slot portion 52 of the seventh card issuing unit 47 and the second slot portion 52 of the eighth card issuing unit 48 are arranged at the x+1th layer in two adjacent slots, that is, the seventh card issuing unit 47 and the eighth card issuing unit 48 are both arranged in the middle layer of the motor winding, and the two slot portions of each card issuing unit are arranged in two adjacent layers.

[0062] 4( c ), the third coil assembly 130 includes a plurality of third segmented coil units 230, each of which includes a fifth card issuing unit 45 and a sixth card issuing unit 46. The fifth card issuing unit 45 and the sixth card issuing unit 46 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end 54 connected in sequence. The first slot outer end 50 and the second slot outer end 54 are in the same direction. The fifth card issuing unit 45 and the sixth card issuing unit 46 are connected in sequence. 46 are all full pitches; the first in-slot portion 51 of the fifth card issuing unit 45 and the first in-slot portion 51 of the sixth card issuing unit 46 are arranged in the nth layer or the 1st layer in two adjacent slots, and the second in-slot portion 52 of the fifth card issuing unit 45 and the second in-slot portion 52 of the sixth card issuing unit 46 are arranged in the nth layer or the 1st layer in two adjacent slots, that is, the two in-slot portions of the fifth card issuing unit 45 and the two in-slot portions of the sixth card issuing unit 46 are all arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0063] Optionally, the first slot outer end portion 50 and the second slot outer end portion 54 of the first card issuing unit 41, the second card issuing unit 42, the seventh card issuing unit 47, the eighth card issuing unit 48, the fifth card issuing unit 45 and the sixth card issuing unit 46 are all arranged at one axial end of the stator core 20, and the slot outer turning portion 53 of the first card issuing unit 41, the second card issuing unit 42, the seventh card issuing unit 47, the eighth card issuing unit 48, the fifth card issuing unit 45 and the sixth card issuing unit 46 are all arranged at the other axial end of the stator core 20.

[0064] It should be noted that Figure 5-Figure 7 The motor stator and motor winding structure shown in FIG4 is composed of a first segmented coil unit 210 shown in FIG4(a), a second segmented coil unit 220 shown in FIG4(d), and a third segmented coil unit 230 shown in FIG4(c), and the coil units are connected in parallel. Obviously, the coil units can also be connected in series, which will not be described in detail here.

[0065] Figure 8 It is a partial enlarged view of the motor winding provided by an embodiment of the present invention.

[0066] Optionally, refer to Figure 2 and Figure 8 The first slot portion 51 of the first card issuing unit 41 is disposed at the 1st or nth layer in the a-th slot, the first slot portion 51 of the second card issuing unit 42 is disposed at the 1st or nth layer in the a+1-th slot, the first slot portion 51 of the fifth card issuing unit 45 is disposed at the nth or 1st layer in the a-th slot, and the first slot portion 51 of the sixth card issuing unit 46 is disposed at the nth or 1st layer in the a+1-th slot. The second slot portion 52 of the first card issuing unit 41 is disposed at the 1st or nth layer in the a+7-th slot, the second slot portion 52 of the second card issuing unit 42 is disposed at the 1st or nth layer in the a+6-th slot, the second slot portion 52 of the fifth card issuing unit 45 is disposed at the nth or 1st layer in the a+6-th slot, and the second slot portion 52 of the sixth card issuing unit 46 is disposed at the nth or 1st layer in the a+7-th slot.

[0067] For example, Figure 2 Only the first slot inner portion 51 of the first card issuing unit 41 and the second card issuing unit 42 and the outer slot turning portion 53 of the fifth card issuing unit 45 and the sixth card issuing unit 46 are marked. Figure 8 Only the first card issuing unit 41 and the second card issuing unit 42 in the first segmented coil unit 210 and the fifth card issuing unit 45 and the sixth card issuing unit 46 in the third segmented coil unit 230 are marked. Figure 8As shown in the circular area of ​​the first card issuing unit 41 and the second card issuing unit 42, it can be seen that the first in-slot portion 51 of the first card issuing unit 41 is arranged at the 1st layer in the 18th slot, the first in-slot portion 51 of the second card issuing unit 42 is arranged at the 1st layer in the 19th slot, the first in-slot portion 51 of the fifth card issuing unit 45 is arranged at the 4th layer in the 18th slot, and the first in-slot portion 51 of the sixth card issuing unit 46 is arranged at the 4th layer in the 19th slot; correspondingly, the second in-slot portion 52 of the first card issuing unit 41 is arranged at the 1st layer in the 25th slot, the second in-slot portion 52 of the second card issuing unit 42 is arranged at the 1st layer in the 24th slot, the second in-slot portion 52 of the fifth card issuing unit 45 is arranged at the 4th layer in the 24th slot, and the second in-slot portion 52 of the sixth card issuing unit 46 is arranged at the 4th layer in the 25th slot.

[0068] By adopting such a card arrangement, the first in-slot portion 51 of the card unit of each first segmented coil unit 210 in the first coil group 110 can be arranged in the same slot as the first in-slot portion 51 of the card unit of each third segmented coil unit 230 in the third coil group 130. Correspondingly, the second in-slot portion 52 of the card unit of each first segmented coil unit 210 in the first coil group 110 can be arranged in the same slot as the second in-slot portion 52 of the card unit of each third segmented coil unit 230 in the third coil group 130. In this way, the local welding ends of the motor winding 10 adopt a method of welding long-pitch or short-pitch card units.

[0069] Figure 9 2 is a structural diagram of another third segmented coil unit 230 provided in an embodiment of the present invention. Figure 10 This is a structural diagram of another motor stator provided by an embodiment of the present invention. Figure 11 This is a structural diagram of another motor winding provided by an embodiment of the present invention. Figure 12 This is a structural diagram of another single-phase coil group provided by an embodiment of the present invention.

[0070] Optionally, referring to Figure 4(a), the first coil group 110 includes a plurality of first segmented coil units 210, each first segmented coil unit 210 includes a first card issuing unit 41 and a second card issuing unit 42, the first card issuing unit 41 and the second card issuing unit 42 are concentric structures, the first card issuing unit 41 and the second card issuing unit 42 both include a first slot outer end 50, a first slot inner part 51, a slot outer turning part 53, a second slot inner part 52 and a second slot outer end 54 connected in sequence, the first slot outer end 50 and the second slot outer end 54 are in the same direction, specifically, the concentric structure means that the slot outer turning parts 53 of the two card issuing units are adjacently arranged, rather than cross-twisted.

[0071] The first card issuing unit 41 has a long pitch, and the second card issuing unit 42 has a short pitch. The long pitch refers to a slot pitch of 7, and the short pitch refers to a slot pitch of 5. The first in-slot portion 51 of the first card issuing unit 41 and the first in-slot portion 51 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots, and the second in-slot portion 52 of the first card issuing unit 41 and the second in-slot portion 52 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots. That is, the two in-slot portions of the first card issuing unit 41 and the two in-slot portions of the second card issuing unit 42 are both arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0072] 4( b), the second coil assembly 120 includes a plurality of second segmented coil units 220, each of which includes a third card issuing unit 43 and a fourth card issuing unit 44. The third card issuing unit 43 and the fourth card issuing unit 44 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end 54 connected in sequence. The first slot outer end 50 and the second slot outer end 54 are opposite, and the third card issuing unit 43 and the fourth card issuing unit are connected in sequence. 44 are all full pitches, and the full pitch refers to a slot pitch of 5; the first in-slot portion 51 of the third card issuing unit 43 and the first in-slot portion 51 of the fourth card issuing unit 44 are arranged in the xth layer in two adjacent slots, and the second in-slot portion 52 of the third card issuing unit 43 and the second in-slot portion 52 of the fourth card issuing unit 44 are arranged in the x+1th layer in two adjacent slots, that is, the third card issuing unit 43 and the fourth card issuing unit 44 are both arranged in the middle layer of the motor winding, and the two in-slot portions of each card issuing unit are arranged in two adjacent layers.

[0073] like Figure 9 As shown, the third coil assembly 130 includes a plurality of third segmented coil units 230, each of which includes a ninth card-isolating unit 49 and a tenth card-isolating unit 40, and the ninth card-isolating unit 49 and the tenth card-isolating unit 40 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52, and a second slot outer end 54 connected in sequence, wherein the first slot outer end 50 and the second slot outer end 54 are in the same direction, and the ninth card-isolating unit 49 and the tenth card-isolating unit 40 are both full pitch; the ninth card-isolating unit 49 and the tenth card-isolating unit 40 both include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52, and a second slot outer end 54 connected in sequence; The second in-slot portion 52 of 9 and the first in-slot portion 51 of the tenth card issuing unit 40 are arranged in the nth layer or the 1st layer in two adjacent slots, that is, the first in-slot portion 51 and the second in-slot portion 52 of the ninth card issuing unit 49, as well as the first in-slot portion 51 and the second in-slot portion 52 of the tenth card issuing unit 40 are all arranged in the same layer of the motor winding 10, and are arranged in the outermost layer or the innermost layer of the motor winding 10, and the second in-slot portion 52 of the ninth card issuing unit 49 and the first in-slot portion 51 of the tenth card issuing unit 40 are arranged in two adjacent slots.

[0074] Optionally, the first slot outer end portion 50 and the second slot outer end portion 54 of the first card issuing unit 41, the second card issuing unit 42, the third card issuing unit 43, the fourth card issuing unit 44, the ninth card issuing unit 49 and the tenth card issuing unit 40 are all arranged at one axial end of the stator core 20, and the slot outer turning portion 53 of the first card issuing unit 41, the second card issuing unit 42, the third card issuing unit 43, the fourth card issuing unit 44, the ninth card issuing unit 49 and the tenth card issuing unit 40 are all arranged at the other axial end of the stator core 20.

[0075] It should be noted that Figure 10-12 The structure of the motor stator and the motor winding shown in FIG4 (a) is composed of the first segmented coil unit 210 shown in FIG4 (b) and the second segmented coil unit 220 shown in FIG4 (b). Figure 9 The third segmented coil unit 230 is shown, and the connection between the coil units is in series. Obviously, the connection between the coil units can also be in parallel, which will not be repeated here.

[0076] Optionally, referring to Figure 4(a), the first coil group 110 includes a plurality of first segmented coil units 210, each first segmented coil unit 210 includes a first card issuing unit 41 and a second card issuing unit 42, the first card issuing unit 41 and the second card issuing unit 42 are concentric structures, the first card issuing unit 41 and the second card issuing unit 42 both include a first slot outer end 50, a first slot inner part 51, a slot outer turning part 53, a second slot inner part 52 and a second slot outer end 54 connected in sequence, the first slot outer end 50 and the second slot outer end 54 are in the same direction, specifically, the concentric structure means that the slot outer turning parts 53 of the two card issuing units are adjacently arranged, rather than cross-twisted.

[0077] The first card issuing unit 41 has a long pitch, and the second card issuing unit 42 has a short pitch. The long pitch refers to a slot pitch of 7, and the short pitch refers to a slot pitch of 5. The first in-slot portion 51 of the first card issuing unit 41 and the first in-slot portion 51 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots, and the second in-slot portion 52 of the first card issuing unit 41 and the second in-slot portion 52 of the second card issuing unit 42 are arranged in the first layer or the nth layer of two adjacent slots. That is, the two in-slot portions of the first card issuing unit 41 and the two in-slot portions of the second card issuing unit 42 are both arranged in the same layer, and this layer is the outermost layer or the innermost layer of the motor winding.

[0078] 4( d ), the second coil assembly 120 includes a plurality of second segmented coil units 220, each of which includes a seventh card-isolating unit 47 and an eighth card-isolating unit 48. The seventh card-isolating unit 47 and the eighth card-isolating unit 48 are concentric structures, the seventh card-isolating unit 47 is a long pitch, and the eighth card-isolating unit 48 is a short pitch. The seventh card-isolating unit 47 and the eighth card-isolating unit 48 each include a first slot outer end portion 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52 and a second slot outer end portion connected in sequence. Part 54, wherein the first slot outer end portion 50 and the second slot outer end portion 54 are opposite to each other, the first slot portion 51 of the seventh card issuing unit 47 and the first slot portion 51 of the eighth card issuing unit 48 are arranged at the xth layer in two adjacent slots, the second slot portion 52 of the seventh card issuing unit 47 and the second slot portion 52 of the eighth card issuing unit 48 are arranged at the x+1th layer in two adjacent slots, that is, the seventh card issuing unit 47 and the eighth card issuing unit 48 are both arranged in the middle layer of the motor winding, and the two slot portions of each card issuing unit are arranged in two adjacent layers.

[0079] See also Figure 9 The third coil assembly 130 includes a plurality of third segmented coil units 230, each of which includes a ninth card-isolating unit 49 and a tenth card-isolating unit 40. The ninth card-isolating unit 49 and the tenth card-isolating unit 40 each include a first slot outer end 50, a first slot inner portion 51, a slot outer turning portion 53, a second slot inner portion 52, and a second slot outer end 54 connected in sequence, wherein the first slot outer end 50 and the second slot outer end 54 are in the same direction, and the ninth card-isolating unit 49 and the tenth card-isolating unit 40 are both of full pitch; the ninth card-isolating unit 49 The second in-slot portion 52 of the ninth card issuing unit 49 and the first in-slot portion 51 of the tenth card issuing unit 40 are arranged in the nth layer or the 1st layer in two adjacent slots, that is, the first in-slot portion 51 and the second in-slot portion 52 of the ninth card issuing unit 49, and the first in-slot portion 51 and the second in-slot portion 52 of the tenth card issuing unit 40 are all arranged in the same layer of the motor winding 10, and are arranged in the outermost layer or the innermost layer of the motor winding 10, and the second in-slot portion 52 of the ninth card issuing unit 49 and the first in-slot portion 51 of the tenth card issuing unit 40 are arranged in two adjacent slots.

[0080] Optionally, the first slot outer end portion 50 and the second slot outer end portion 54 of the first card issuing unit 41, the second card issuing unit 42, the seventh card issuing unit 47, the eighth card issuing unit 48, the ninth card issuing unit 49 and the tenth card issuing unit 40 are all arranged at one axial end of the stator core 20, and the slot outer turning portion 53 of the first card issuing unit 41, the second card issuing unit 42, the seventh card issuing unit 47, the eighth card issuing unit 48, the ninth card issuing unit 49 and the tenth card issuing unit 40 are all arranged at the other axial end of the stator core 20.

[0081] It should be noted that the above embodiment is composed of the first segmented coil unit 210 shown in FIG4(a), the second segmented coil unit 220 shown in FIG4(d), and Figure 9 The third segmented coil unit 230 shown is composed of the coil units, and the connection between the coil units can be in series or in parallel, which will not be repeated here.

[0082] Figure 13 This is a partial enlarged view of another motor winding provided by an embodiment of the present invention.

[0083] Alternatively, see Figure 13 , the first slot portion 51 of the first card issuing unit 41 is arranged at the 1st layer or the nth layer in the a-th slot, the first slot portion 51 of the second card issuing unit 42 is arranged at the 1st layer or the n-th layer in the a+1-th slot, the first slot portion 51 of the ninth card issuing unit 49 is arranged at the n-th layer or the 1st layer in the a+1-th slot, and the first slot portion 51 of the tenth card issuing unit 40 is arranged at the n-th layer or the 1st layer in the a+6-th slot; the second slot portion 52 of the first card issuing unit 41 is arranged at the 1st layer or the n-th layer in the a+7-th slot, the second slot portion 52 of the second card issuing unit 42 is arranged at the 1st layer or the n-th layer in the a+6-th slot, the second slot portion 52 of the ninth card issuing unit 49 is arranged at the n-th layer or the 1st layer in the a+7-th slot, and the second slot portion 52 of the tenth card issuing unit 40 is arranged at the n-th layer or the 1st layer in the a+12-th slot.

[0084] For example, Figure 13 Only the first card issuing unit 41 and the second card issuing unit 42 of the first segmented coil unit 210, and the ninth card issuing unit 49 and the tenth card issuing unit 40 of the third segmented coil unit 230 are marked. It can be seen that the first in-slot portion 51 of the first card issuing unit 41 is disposed at the first layer of the 18th slot, the first in-slot portion 51 of the second card issuing unit 42 is disposed at the first layer of the 19th slot, the first in-slot portion 51 of the ninth card issuing unit 49 is disposed at the fourth layer of the 19th slot, and the first in-slot portion 51 of the tenth card issuing unit 40 is disposed at the fourth layer of the 24th slot. Correspondingly, the second in-slot portion 52 of the first card issuing unit 41 is disposed at the first layer of the 25th slot, the second in-slot portion 52 of the second card issuing unit 42 is disposed at the first layer of the 24th slot, the second in-slot portion 52 of the ninth card issuing unit 49 is disposed at the fourth layer of the 25th slot, and the second in-slot portion 52 of the tenth card issuing unit 40 is disposed at the fourth layer of the 30th slot.

[0085] By adopting such a card arrangement, the first in-slot portion 51 of the card unit of each first segmented coil unit 210 in the first coil assembly 110 and the first in-slot portion 51 of the card unit of each third segmented coil unit 230 in the third coil assembly 130 are arranged in two adjacent slots. Accordingly, the second in-slot portion 52 of the first card unit 41 of each first segmented coil unit 210 in the first coil assembly 110 and the second in-slot portion 52 of the ninth card unit 49 of each third segmented coil unit 230 in the third coil assembly 130 can be arranged in the same slot. In this way, the local welded ends of the motor winding 10 are consistent, eliminating the need to use a staggered structure to place the various card units, and eliminating the need for cross-welding of local welded ends in series branches using long-pitch or short-pitch structures.

[0086] An embodiment of the present invention further provides a card issuing motor, which includes the motor stator described in any of the above embodiments.

[0087] Optionally, the card issuing motor is a parallel card issuing motor or a series card issuing motor.

[0088] The card issuing motor provided in the embodiment of the present invention includes the motor stator in the above embodiment. Therefore, the card issuing motor provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0089] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0090] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles employed. 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 detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A motor stator, characterized in that: It includes a motor winding and an integral stator core; the stator core includes N tooth portions, and the N tooth portions extend radially inward and are evenly distributed in the circumferential direction; an insulating slot is formed between two adjacent tooth portions, and the number of the insulating slots is N, N is a multiple of 3, and N is an even number; the stator core divides each of the insulating slots into the first layer, the second layer, ……, the x layer, the x + 1 layer, ……, the n layer along the radial direction and pointing to the axis direction, 1 < x < n, n ≥ 4, and n is an even number; The motor winding includes a three-phase coil group, wherein each phase of the coil group includes: a first coil group, a second coil group, and a third coil group; the first coil group is arranged in the first layer of the motor winding, the second coil group is arranged in the middle layer of the motor winding, and the third coil group is arranged in the nth layer of the motor winding; or, the first coil group is arranged in the nth layer of the motor winding, the second coil group is arranged in the middle layer of the motor winding, and the third coil group is arranged in the first layer of the motor winding; Wherein, the second coil group includes a plurality of second segmented coil units, and each second segmented coil unit includes a third hairpin unit and a fourth hairpin unit. The third hairpin unit and the fourth hairpin unit each include a first outer slot end portion, a first inner slot portion, an outer slot turning portion, a second inner slot portion, and a second outer slot end portion that are sequentially connected. The first outer slot end portion and the second outer slot end portion are opposite. The first inner slot portion of the third hairpin unit and the first inner slot portion of the fourth hairpin unit are arranged in the x layer of two adjacent slots, and the second inner slot portion of the third hairpin unit and the second inner slot portion of the fourth hairpin unit are arranged in the x + 1 layer of two adjacent slots; or; The second coil group includes a plurality of second segmented coil units, and each second segmented coil unit includes a seventh hairpin unit and an eighth hairpin unit. The seventh hairpin unit and the eighth hairpin unit each include a first outer slot end portion, a first inner slot portion, an outer slot turning portion, a second inner slot portion, and a second outer slot end portion that are sequentially connected. The first outer slot end portion and the second outer slot end portion are opposite. The first inner slot portion of the seventh hairpin unit and the first inner slot portion of the eighth hairpin unit are arranged in the x layer of two adjacent slots, and the second inner slot portion of the seventh hairpin unit and the second inner slot portion of the eighth hairpin unit are arranged in the x + 1 layer of two adjacent slots.

2. The motor stator according to claim 1, wherein, The first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit. The first card-isolating unit and the second card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch. The first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots. In the second coil assembly, the third card issuing unit and the fourth card issuing unit are both at full pitch; The third coil group includes a plurality of third segmented coil units, each of which includes a fifth card issuing unit and a sixth card issuing unit. The fifth card issuing unit and the sixth card issuing unit both include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence. The fifth card issuing unit and the sixth card issuing unit both have a full pitch; the first slot inner portion of the fifth card issuing unit and the first slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots, and the second slot inner portion of the fifth card issuing unit and the second slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

3. The motor stator according to claim 2, characterized in that: The first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at the other axial end of the stator core.

4. The motor stator according to claim 1, characterized in that: The first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit. The first card-isolating unit and the second card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch. The first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots. In the second coil assembly, the seventh card issuing unit has a long pitch, and the eighth card issuing unit has a short pitch; The third coil group includes a plurality of third segmented coil units, each of which includes a fifth card issuing unit and a sixth card issuing unit. The fifth card issuing unit and the sixth card issuing unit both include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence. The fifth card issuing unit and the sixth card issuing unit both have a full pitch; the first slot inner portion of the fifth card issuing unit and the first slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots, and the second slot inner portion of the fifth card issuing unit and the second slot inner portion of the sixth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

5. The motor stator according to claim 4, characterized in that: The first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the fifth card issuing unit and the sixth card issuing unit are all arranged at the other axial end of the stator core.

6. The motor stator according to any one of claims 2 or 4, characterized in that: The first slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a-th slot, the first slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+1-th slot, the first slot portion of the fifth card issuing unit is arranged at the nth layer or the 1st layer in the a-th slot, and the first slot portion of the sixth card issuing unit is arranged at the nth layer or the 1st layer in the a+1-th slot; The second slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a+7th slot, the second slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+6th slot, the second slot portion of the fifth card issuing unit is arranged at the nth layer or the 1st layer in the a+6th slot, and the second slot portion of the sixth card issuing unit is arranged at the nth layer or the 1st layer in the a+7th slot.

7. The motor stator according to claim 1, characterized in that: The first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit. The first card-isolating unit and the second card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch. The first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots. In the second coil assembly, the third card issuing unit and the fourth card issuing unit are both at full pitch; The third coil group includes a plurality of third segmented coil units, each of the third segmented coil units includes a ninth card issuing unit and a tenth card issuing unit, the ninth card issuing unit and the tenth card issuing unit each include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, the ninth card issuing unit and the tenth card issuing unit both having a full pitch; the second slot inner portion of the ninth card issuing unit and the first slot inner portion of the tenth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

8. The motor stator according to claim 7, characterized in that: The first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the third card issuing unit, the fourth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at the other axial end of the stator core.

9. The motor stator according to claim 1, characterized in that: The first coil assembly includes a plurality of first segmented coil units, each of which includes a first card-isolating unit and a second card-isolating unit. The first card-isolating unit and the second card-isolating unit each include a first slot-outer end portion, a first slot-inner portion, a slot-outer turning portion, a second slot-inner portion, and a second slot-outer end portion connected in sequence. The first card-isolating unit and the second card-isolating unit are concentric structures, wherein the first card-isolating unit has a long pitch and the second card-isolating unit has a short pitch. The first slot-inner portion of the first card-isolating unit and the first slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots, and the second slot-inner portion of the first card-isolating unit and the second slot-inner portion of the second card-isolating unit are arranged in the first layer or the nth layer in two adjacent slots. In the second coil assembly, the seventh card issuing unit has a long pitch, and the eighth card issuing unit has a short pitch; The third coil group includes a plurality of third segmented coil units, each of the third segmented coil units includes a ninth card issuing unit and a tenth card issuing unit, the ninth card issuing unit and the tenth card issuing unit each include a first slot outer end portion, a first slot inner portion, a slot outer turning portion, a second slot inner portion, and a second slot outer end portion connected in sequence, the ninth card issuing unit and the tenth card issuing unit both having a full pitch; the second slot inner portion of the ninth card issuing unit and the first slot inner portion of the tenth card issuing unit are arranged in the nth layer or the 1st layer in two adjacent slots.

10. The motor stator according to claim 9, characterized in that: The first slot outer end portion and the second slot outer end portion of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at one axial end of the stator core, and the slot outer turning portions of the first card issuing unit, the second card issuing unit, the seventh card issuing unit, the eighth card issuing unit, the ninth card issuing unit and the tenth card issuing unit are all arranged at the other axial end of the stator core.

11. The motor stator according to any one of claims 7 or 9, characterized in that: The first slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a-th slot, the first slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+1-th slot, the first slot portion of the ninth card issuing unit is arranged at the nth layer or the 1st layer in the a+1-th slot, and the first slot portion of the tenth card issuing unit is arranged at the nth layer or the 1st layer in the a+6-th slot; The second slot portion of the first card issuing unit is arranged at the 1st layer or the nth layer in the a+7th slot, the second slot portion of the second card issuing unit is arranged at the 1st layer or the nth layer in the a+6th slot, the second slot portion of the ninth card issuing unit is arranged at the nth layer or the 1st layer in the a+7th slot, and the second slot portion of the tenth card issuing unit is arranged at the nth layer or the 1st layer in the a+12th slot.

12. A card issuing motor, characterized in that: The hairpin motor comprises the motor stator according to any one of claims 1 to 11.

13. The card issuing motor according to claim 12, characterized in that: The card issuing motor is a parallel card issuing motor or a series card issuing motor.

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