CN211239494U - Motor winding and motor stator - Google Patents

Abstract

The embodiment of the utility model discloses motor winding and motor stator. Wherein, motor winding's phase number is 3, and motor winding includes: at least one first segmented coil set; the N first sectional coil units of each first sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 slots are distributed in two adjacent layers along the radial direction; any first sectional coil unit comprises 2 first hairpin coils with different pitches and is arranged concentrically; in any first sectional coil unit, the pitch of the first hairpin coil with the largest pitch in the circumferential direction is equal to X slot pitches; the sum of the span of the first slot outer end of the first hairpin coil in the circumferential direction and the span of the second slot outer end in the circumferential direction is Y slot pitches, where X + Y is 13 and X is 8 or 6. The utility model discloses the kind of coil unit that technical scheme used is few, can reduce the circulation that the unbalanced motor winding inductance that leads to under the multi-branch circuit condition.

Description

Motor winding and motor stator

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor winding and motor stator.

Background

The stator winding of the hairpin motor comprises a plurality of hairpin coils, and the hairpin coils penetrate into the slots of the stator core according to a certain arrangement mode to form the required winding of the single-phase motor or the multi-phase motor. The hairpin coils used in the prior art are various, the arrangement mode is complex, a large number of bus bars and bus bars are needed to be used for connecting branches and neutral points of windings of each phase, the manufacturing process is complex, the production cost is high, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a motor winding and motor stator, the kind of the coil unit who uses is few, and the mode of arranging is simple, can reduce the use of busbar and busbar, and then reduces the preparation technology complexity, and reduction in production cost improves machining efficiency, and can improve the symmetry of winding inductance, makes each branch road inductance symmetry, and then can reduce the circulation that the unbalanced motor winding inductance that leads to under the multi-branch-circuit condition.

In a first aspect, an embodiment of the present invention provides a motor winding, the number of phases of the motor winding is 3, the motor winding includes:

at least one first segmented coil set;

each first sectional coil group comprises N first sectional coil units, and each first sectional coil unit comprises 2 first hairpin coils with different pitches, wherein N is more than or equal to 6, N is a multiple of 3, and N is an integer; any first hairpin coil includes: the first slot outer end part, the first slot inner part, the first slot outer turning part, the second slot inner part and the second slot outer end part are sequentially connected, the first slot inner part and the second slot inner part are positioned in different slots, the extending directions of the first slot outer end part and the second slot outer end part in the circumferential direction are opposite and far away, and 2 first hairpin coils are concentrically arranged;

in any first sectional coil unit, the pitch of the first in-slot portion and the second in-slot portion of the first hairpin coil having the largest pitch in the circumferential direction is equal to X slot pitches;

the N first sectional coil units of each first sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 slots are distributed in two adjacent layers along the radial direction; in any first sectional coil group, the first in-slot parts and the first out-slot parts of all the first hairpin coils are positioned in the same layer, the second in-slot parts and the second out-slot parts of all the first hairpin coils are positioned in the same layer, and the first in-slot parts and the second in-slot parts of all the first hairpin coils are positioned in different layers;

in each first segmented coil group, the circumferential spans of the first groove outer ends of all the first hairpin coils are equal, the circumferential spans of the second groove outer ends of all the first hairpin coils are equal, and the sum of the circumferential spans of the first groove outer ends of the first hairpin coils and the circumferential span of the second groove outer ends of the first hairpin coils is Y groove pitches, wherein X + Y is 13, and X is 8 or 6;

the first out-of-slot turning parts of all the first hairpin coils of the at least one first sectional coil group are positioned at one side of the motor, and the first out-of-slot end parts and the second out-of-slot end parts of all the first hairpin coils of the at least one first sectional coil group are positioned at the other side of the motor.

Furthermore, the number of the first segmented coil groups is at least two, and the at least two first segmented coil groups are arranged in a surrounding manner along the radial direction;

the outer end parts of the slots in the two adjacent first sectional coil groups are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer end parts of the slots on the second layer and the third layer in the circumferential direction are opposite, and the sum of the circumferential span of the outer end part of one slot on the second layer and the circumferential span of the outer end part of one slot on the third layer is equal to Y slot intervals.

Further, in each first segmented coil group, the span of the outer end part of the first slot of any first hairpin coil in the circumferential direction is equal to the span of the outer end part of the second slot in the circumferential direction.

Further, in each first segmented coil group, the circumferential span of the outer end part of the first slot of any first hairpin coil is not equal to the circumferential span of the outer end part of the second slot.

Further, the motor winding further comprises: the second sectional coil group and at least one first sectional coil group are arranged in a surrounding manner along the radial direction, and the second sectional coil group is positioned at the outermost side or the innermost side;

wherein, the second sectional coil group includes: n/2 second sectional coil units, wherein any second sectional coil unit comprises 2 second hairpin coils with different pitches;

any second hairpin coil includes: the third slot outer end part, the third slot inner part, the second slot outer bending part, the fourth slot inner part and the fourth slot outer end part are sequentially connected, the third slot inner part and the fourth slot inner part are positioned in different slots, and 2 second hairpin coils are concentrically arranged; in any second segmented coil unit, the pitch of the third in-slot portion and the fourth in-slot portion of the second hairpin coil with the largest pitch in the circumferential direction is equal to 7 slot pitches;

n/2 second sectional coil units of the second sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 grooves are distributed in a single layer along the radial direction;

in the second sectional coil group, N/2 second sectional coil units are 3 third sectional coil units and N/2-3 fourth sectional coil units;

the extension directions of the outer end part of a third slot and the outer end part of a fourth slot of a second hairpin coil of any third segmented coil unit in the circumferential direction are the same;

the extension directions of the outer end part of the third slot and the outer end part of the fourth slot of the second hairpin coil of any fourth sectional coil unit in the circumferential direction are opposite and far away;

the outer end parts of the slots in the second sectional coil group are distributed in two layers along the radial direction, and the extending directions of the outer end parts of the slots in the same layer in the circumferential direction are the same;

the spans of the third and fourth slot outer ends of the second hairpin coils in all the third sectional coil units and the fourth slot outer ends of the second hairpin coils in all the fourth sectional coil units in the circumferential direction are equal; the spans of the outer ends of the third slots of the second hairpin coils in all the fourth sectional coil units in the circumferential direction are equal; the sum of the circumferential spans of the third slot outer end and the fourth slot outer end of the second hairpin coil in the fourth segmented coil unit is equal to 6 slot pitches;

the second segmented coil group and the outer end part of the groove of the most adjacent first segmented coil group are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer end parts of the grooves on the second layer and the third layer are opposite in the circumferential direction, and the sum of the circumferential span of the outer end part of the groove on the second layer and the circumferential span of the outer end part of the groove on the third layer is equal to Y groove intervals;

in the second sectional coil group and the at least one first sectional coil group, the first out-of-slot turning parts of all the first hairpin coils and the second out-of-slot turning parts of all the second hairpin coils are positioned at one side of the motor, and the first out-of-slot end parts and the second out-of-slot end parts of all the first hairpin coils and the third out-of-slot end parts and the fourth out-of-slot end parts of all the second hairpin coils are positioned at the other side of the motor.

Further, in the second segmented coil group, the segmented coil unit for forming the same phase winding includes: the segmented coil units used for forming the same phase winding are sequentially arranged along the circumferential direction, in two adjacent segmented coil units, the span of the third in-slot parts of the second hairpin coils with the largest two pitches in the circumferential direction is 12 slot pitches, and the span of the fourth in-slot parts of the second hairpin coils with the largest two pitches in the circumferential direction is 12 slot pitches;

the third in-slot parts of the 2 second hairpin coils of any second segmented coil unit are positioned in the adjacent 2 slots, and the fourth in-slot parts of the 2 second hairpin coils of any second segmented coil unit are positioned in the adjacent 2 slots.

Furthermore, the first slot outer end part, the second slot outer end part, the third slot outer end part and the fourth slot outer end part are all provided with extension ends, 6 first sectional coil units of the first sectional coil group far away from the second sectional coil group and the extension ends of the slot outer end parts far away from the second sectional coil group are used as connection ends,

in any first sectional coil group, except an extending end which is in the same radial direction with an extending end serving as a connecting end, two extending ends which are in the same radial direction in the other extending ends are connected;

in any second sectional coil group, except an extending end which is in the same radial direction with the extending end as the connecting end, two extending ends which are in the same radial direction in the other extending ends are connected;

and the extending ends which are positioned in the same radial direction as the extending ends as the connecting ends are connected, and every two adjacent extending ends are connected in the other extending ends except the extending ends as the connecting ends.

Furthermore, the first in-slot parts of the 2 first hairpin coils of any first sectional coil unit are positioned in the adjacent 2 slots of the same layer, and the second in-slot parts of the 2 first hairpin coils of any first sectional coil unit are positioned in the adjacent 2 slots of the same layer;

in each first segmented coil group, the first in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the first in-slot portions of the 2 first hairpin coils of the (N + 1) th first segmented coil unit are located in adjacent 4 slots of the same layer, and the second in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the second in-slot portions of the 2 first hairpin coils of the (N + 1) th first segmented coil unit are located in adjacent 4 slots of the same layer, wherein N is 1, 2 … … N-1, and N is an integer;

in each first segmented coil group, the first in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the first in-slot portions of the 2 first hairpin coils of the 1 st first segmented coil unit are located in adjacent 4 slots of the same layer, and the second in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the second in-slot portions of the 2 first hairpin coils of the 1 st first segmented coil unit are located in adjacent 4 slots of the same layer.

Further, the number of slots per pole per phase of the motor winding is 2.

In a second aspect, the embodiment of the present invention further provides a motor stator, including: stator core with the utility model discloses the motor winding that arbitrary embodiment provided, stator core are provided with a plurality of along circumference arrangement and along axially extended groove, the first inslot portion and the second inslot portion of first hairpin coil are located the inslot.

The utility model discloses motor winding's among the technical scheme phase number is 3, and motor winding includes: at least one first segmented coil set; each first segmented coil group comprises N first segmented coil units, any first segmented coil unit comprises 2 first hairpin coils with different pitches, the extension directions of the first slot outer end part and the second slot outer end part of any first hairpin coil are opposite and far away in the circumferential direction, and the 2 first hairpin coils are concentrically arranged; in any first sectional coil unit, the pitch of the first hairpin coil with the largest pitch in the circumferential direction is equal to X slot pitches; the N first sectional coil units of each first sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 slots are distributed in two adjacent layers along the radial direction; in any first sectional coil group, the first in-slot parts and the first out-slot parts of all the first hairpin coils are positioned in the same layer, the second in-slot parts and the second out-slot parts of all the first hairpin coils are positioned in the same layer, and the first in-slot parts and the second in-slot parts of all the first hairpin coils are positioned in different layers; the sum of the span of the first slot outer end of the first hairpin coil in the circumferential direction and the span of the second slot outer end in the circumferential direction is Y slot pitches, where X + Y is 13 and X is 8 or 6. The utility model discloses the kind of the coil unit that technical scheme used is few, and the mode of arranging is simple, can reduce the preparation technology complexity, and reduction in production cost improves machining efficiency, and can improve the symmetry of winding inductance, makes each branch road inductance symmetry, and then can reduce the circulation that the unbalanced motor winding inductance that leads to under the multi-branch road condition.

Drawings

Fig. 1 is a schematic structural diagram of a first segmented coil assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a motor stator according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first segmented coil unit according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating a tiled and expanded view of a phase winding of a motor winding according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a tiled expansion of a phase winding of another motor winding according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another motor stator according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second segmented coil assembly according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating a tiled expansion of a phase winding of another motor winding according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second segmented coil assembly according to an embodiment of the present invention;

fig. 10 is a schematic view illustrating a tiled expansion of a phase winding of another motor winding according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another motor stator according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another motor stator according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of another motor stator according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

An embodiment of the utility model provides a motor winding. The motor winding can be a stator winding or a rotor winding and can be arranged on a stator core or a rotor core of the motor. Fig. 1 is a schematic structural diagram of a first segmented coil assembly according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a motor stator provided by an embodiment of the present invention. Fig. 3 is a schematic structural diagram of a first segmented coil unit according to an embodiment of the present invention. Fig. 4 is a schematic view illustrating a tiled and expanded phase winding of a motor winding according to an embodiment of the present invention. As shown in fig. 1 to 4, the number of phases of the motor winding is 3, and the motor winding includes: at least one first segmented coil assembly 100.

Each first segmented coil assembly 100 includes N first segmented coil units 110, and each first segmented coil unit 110 includes 2 first hairpin coils 10 with different pitches, where N is greater than or equal to 6, N is a multiple of 3, and N is an integer; any of the first hairpin coils 10 includes: the first out-of-slot end 11, the first in-slot portion 12, the first out-of-slot turning portion 13, the second in-slot portion 14 and the second out-of-slot end 15 are connected in sequence, the first in-slot portion 12 and the second in-slot portion 14 are located in different slots, the extending directions of the first out-of-slot end 11 and the second out-of-slot end 15 in the circumferential direction are opposite and far away, and the 2 first hairpin coils 10 are arranged concentrically. In which fig. 1 exemplarily shows a case where the motor winding includes a first segmented coil assembly 100. The extending direction of A1a2 in fig. 1 is parallel to the axial direction, the extending direction of B1B2 is the circumferential direction, and O1O2, O1O3 and O1O4 are three radially extending directions drawn as an example. Only a part of the first segment coil units are exemplarily shown in fig. 1, and the number of the remaining first segment coil units may be sequentially determined according to the position. Optionally, the number of slots per phase per pole of the motor is 2, and the number of slots per phase per pole is equal to the total number of slots per phase of the motor divided by the number of phases and then divided by the number of poles. The three-phase winding may include U-phase, V-phase and W-phase, and the number of poles of the motor winding is illustrated as 8. In the embodiments of the present invention, the number of slots is 48, that is, the number of slots 2 of the stator core is 48, and the number of teeth 3 is 48.

As shown in fig. 3, in any of the first segmented coil units 110, the pitch in the circumferential direction of the first in-slot portion 12 and the second in-slot portion 14 of the first hairpin coil 10 having the largest pitch is equal to X slot pitches. Fig. 3 exemplarily shows that the pitches of the two first hairpin coils in the first segmented coil unit 110 are D1 and D2, respectively, wherein D2 is greater than D1, and D2 is the pitch of the first hairpin coil 10 with the largest pitch. The groove pitch d is a distance between two adjacent grooves in the circumferential direction. The first slot outer end 11 of the first hairpin coil 10 has a circumferential span D3, and the second slot outer end 15 has a circumferential span D4.

As shown in fig. 1 and 4, the N first segment-type coil units 110 of each first segment-type coil assembly 100 are sequentially arranged along the circumferential direction, and the portions in the N × 2 slots are distributed in two adjacent layers along the radial direction; in any of the first segmented coil groups 100, the first in-slot portions 12 and the first out-slot portions 11 of all the first hairpin coils 10 are located in the same layer, the second in-slot portions 14 and the second out-slot portions 15 of all the first hairpin coils 10 are located in the same layer, and the first in-slot portions 12 and the second in-slot portions 14 of all the first hairpin coils 10 are located in different layers.

As shown in fig. 1 and 4, in each first split-type coil assembly 100, the span D3 in the circumferential direction of the first outer slot end 11 of all the first hairpin coils 10 is equal, the span D4 in the circumferential direction of the second outer slot end 15 of all the first hairpin coils 10 is equal, and the sum of the span D3 in the circumferential direction of the first outer slot end 11 of the first hairpin coil 10 and the span D4 in the circumferential direction of the second outer slot end 15 is Y slot pitches D, that is, D3+ D4 is Y, where X + Y is 13. Alternatively, as shown in fig. 1 and 4, X ═ 8. As shown in fig. 1, fig. 3, and fig. 4, D1 is 6D, D2 is 8D, X is 8, D3+ D4 is 5D, and Y is 5.

As shown in fig. 2, the first out-of-slot turns 13 of all the first hairpin coils 10 of at least one first split coil set 100 are located at one side of the motor, and the first out-of-slot ends 11 and the second out-of-slot ends 15 of all the first hairpin coils 10 of at least one first split coil set 100 are located at the other side of the motor.

Wherein, the number of slots of each phase of each pole of the motor winding is 2. Fig. 4 exemplarily shows a tiled development of a phase winding in case of a motor winding comprising two first segmented coil groups, one and two layers corresponding to one first segmented coil group, and three and four layers corresponding to the other segmented coil group. The slot numbers in FIG. 4 are 1-48, respectively. As shown in fig. 4, the U-phase windings are located in the slots 24, 23, 22, 18, 17, 16, 12, 11, 10, 6, 5, 4, 48, 47, 46, 42, 41, 40, 36, 35, 34, 30, 29, 28 in one and two layers; in three and four layers in the grooves 24, 23, 22, 18, 17, 16, 12, 11, 10, 6, 5, 4, 48, 47, 46, 42, 41, 40, 36, 35, 34, 30, 29, 28. As can be seen from fig. 4, the U-phase winding has 8 poles in one and two layers of the U-phase winding. The V-phase and W-phase windings may be formed by moving the U-phase winding 2 slots or 4 slots in the circumferential direction. The U-phase winding comprises 4 branches, namely U1, U2, U3 and U4, wherein the U-phase outgoing lines in fig. 4 can be connected, and the U-phase neutral points in fig. 4 can be connected to form the U-phase winding. The neutral points of the four branches may be connected by a busbar. The embodiment of the utility model provides a do not do the injecing to motor winding's slot number and pole number, can set up as required.

The phase number of the motor winding in the technical scheme of this embodiment is 3, and the motor winding includes: at least one first segmented coil set; each first segmented coil group comprises N first segmented coil units, any first segmented coil unit comprises 2 first hairpin coils with different pitches, the extension directions of the first slot outer end part and the second slot outer end part of any first hairpin coil are opposite and far away in the circumferential direction, and the 2 first hairpin coils are concentrically arranged; in any first sectional coil unit, the pitch of the first hairpin coil with the largest pitch in the circumferential direction is equal to X slot pitches; the N first sectional coil units of each first sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 slots are distributed in two adjacent layers along the radial direction; in any first sectional coil group, the first in-slot parts and the first out-slot parts of all the first hairpin coils are positioned in the same layer, the second in-slot parts and the second out-slot parts of all the first hairpin coils are positioned in the same layer, and the first in-slot parts and the second in-slot parts of all the first hairpin coils are positioned in different layers; the sum of the span of the first slot outer end of the first hairpin coil in the circumferential direction and the span of the second slot outer end in the circumferential direction is Y slot pitches, where X + Y is 13. The technical scheme of the embodiment has the advantages of few types of coil units, simple arrangement mode, capability of reducing the complexity of the manufacturing process, reducing the production cost, improving the processing efficiency, improving the symmetry of the winding inductance, enabling the branch inductances to be symmetrical, and further reducing the circulating current caused by unbalanced inductance of the winding of the clamping motor under the condition of multiple branches.

An embodiment of the utility model provides a motor winding of another kind. Fig. 5 is a schematic view illustrating a tiled and expanded phase winding of another motor winding according to an embodiment of the present invention. In the above embodiment, X is equal to 6 and Y is equal to 7.

As shown in fig. 3 and 5, D1-4D, D2-6D, X-6, D3+ D4-7D, and Y-7. As shown in fig. 5, the U-phase windings are located in the slots 24, 23, 22, 18, 17, 16, 12, 11, 10, 6, 5, 4, 48, 47, 46, 42, 41, 40, 36, 35, 34, 30, 29, 28 in one and two layers; in three and four layers in the grooves 24, 23, 22, 18, 17, 16, 12, 11, 10, 6, 5, 4, 48, 47, 46, 42, 41, 40, 36, 35, 34, 30, 29, 28. As can be seen from fig. 5, in one and two layers of the U-phase winding, the U-phase winding has 8 poles, and the corresponding in-slot portion of each pole occupies three slots, not two slots. The technical scheme of the embodiment has the advantages of few types of coil units, simple arrangement mode, capability of reducing the complexity of the manufacturing process, reducing the production cost, improving the processing efficiency, improving the symmetry of the winding inductance, enabling the branch inductances to be symmetrical, and further reducing the circulating current caused by unbalanced inductance of the winding of the clamping motor under the condition of multiple branches.

An embodiment of the utility model provides a motor winding of another kind. On the basis of the above-described embodiment, with continued reference to fig. 2 and 4, the number of the first segment-type coil assemblies 100 is at least two, and the at least two first segment-type coil assemblies are arranged in a surrounding manner in the radial direction. The outer ends of the slots in two adjacent first segmented coil groups 100 are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer ends of the slots on the second layer and the third layer in the circumferential direction are opposite, and the sum of the circumferential span of the outer end of one slot on the second layer and the circumferential span of the outer end of one slot on the third layer is equal to Y slot pitches d.

Illustratively, as shown in fig. 4, the extending direction of the outer end of the slot located in the second layer in the circumferential direction is leftward, the extending direction of the outer end of the slot located in the third layer in the circumferential direction is rightward, that is, the extending directions of the outer ends of the slots located in the second layer and the third layer in the circumferential direction are opposite, and the sum of the span of the outer end of the slot located in the second layer in the circumferential direction and the span of the outer end of the slot located in the third layer in the circumferential direction is equal to 5 slot pitches d, that is, 5d, where X is equal to 8 and Y is equal to 5.

Illustratively, as shown in fig. 5, the extending direction of the outer end of the slot at the second layer in the circumferential direction is leftward, the extending direction of the outer end of the slot at the third layer in the circumferential direction is rightward, that is, the extending directions of the outer ends of the slots at the second layer and the third layer in the circumferential direction are opposite, and the sum of the span of the outer end of the slot at the second layer in the circumferential direction and the span of the outer end of the slot at the third layer in the circumferential direction is equal to 7 slot pitches d, that is, 7d, where X is 6 and Y is 7.

Alternatively, on the basis of the above-described embodiment, with reference to fig. 1, 3, 4 and 5, in each first split-type coil assembly 100, the span D3 in the circumferential direction of the first slot outer end 11 of any first hairpin coil 10 is equal to the span D4 in the circumferential direction of the second slot outer end 15, that is, D3 is D4. Illustratively, as shown in fig. 4, D3 ═ D4 ═ 2.5D. Illustratively, as shown in fig. 5, D3 ═ D4 ═ 3.5D.

Alternatively, on the basis of the above embodiment, in each first split-type coil assembly 100, the circumferential span of the first slot outer end 11 of any first hairpin coil 10 is not equal to the circumferential span of the second slot outer end 15. For example, if X is 8 and Y is 5, then D3 is 1D and D4 is 4D, and further, if the motor winding includes two first segmented coil windings, the outer slot ends are radially distributed in four layers from inside to outside, the outer slot ends of one first segmented coil winding are located in the first layer and the second layer, and the outer slot ends of the other first segmented coil winding are located in the third layer and the fourth layer, then the outer slot ends of the first layer to the fourth layer have the following spans in the circumferential direction: 1d, 4d, 1d and 4d, or, in order, 4d, 1d, 4d and 1 d. For example, if X is 6 and Y is 7, then D3 is 2D and D4 is 5D, and further, if the motor winding includes two first segmented coil windings, the outer slot ends are radially distributed in four layers from inside to outside, the outer slot ends of one first segmented coil winding are located in the first layer and the second layer, and the outer slot ends of the other first segmented coil winding are located in the third layer and the fourth layer, then the outer slot ends of the first layer to the fourth layer have the following spans in the circumferential direction: 2d, 5d, 2d and 5d, or, in order, 5d, 2d, 5d and 2 d.

An embodiment of the utility model provides a motor winding of another kind. Fig. 6 is a schematic structural diagram of another motor stator according to an embodiment of the present invention. Fig. 7 is a schematic structural diagram of a second segmented coil assembly according to an embodiment of the present invention. Fig. 8 is a schematic view illustrating a tiled and expanded phase winding of another motor winding according to an embodiment of the present invention. On the basis of the above embodiments, as shown in fig. 1, 3, 6, 7 and 8, the motor winding further includes: a second segmented coil assembly 200. As shown in fig. 6, the second segment-type coil assembly 200 and at least one first segment-type coil assembly 100 are arranged in a surrounding manner along the radial direction, and the second segment-type coil assembly 200 is located at the outermost side or the innermost side.

As shown in fig. 7 and 8, the second segmented coil assembly 200 includes: n/2 second segmented coil units 210, and any second segmented coil unit 210 comprises 2 second hairpin coils 20 with different pitches.

As shown in fig. 7 and 8, each of the second hairpin coils 20 includes: the third slot outer end part 21, the third slot inner part 22, the second slot outer turning part 23, the fourth slot inner part 24 and the fourth slot outer end part 25 are sequentially connected, the third slot inner part 22 and the fourth slot inner part 24 are positioned in different slots, and the 2 second hair clip coils 20 are concentrically arranged; in any of the second segmented coil units 210, the pitch of the third in-slot portion 22 and the fourth in-slot portion 24 of the second hairpin coil 20 having the largest pitch is equal to 7 slot pitches in the circumferential direction.

Referring to fig. 7 and 8, N/2 second segment coil units of the second segment coil assembly 200 are sequentially arranged along the circumferential direction, and the parts in the N × 2 slots are distributed in a single layer along the radial direction.

Referring to fig. 7 and 8, in the second segmented coil set 200, N/2 second segmented coil units 210 are 3 third segmented coil units 230 and N/2-3 fourth segmented coil units 240.

As shown in fig. 7 and 8, the third and fourth slot outer ends 21 and 25 of the second card wire coil 20 of any one of the third segmented coil units 230 extend in the same direction in the circumferential direction. Illustratively, as shown in fig. 8, the third and fourth slot outer ends 21 and 25 of the second card wire coil 20 of the third segmented coil unit 230 extend rightward in the circumferential direction. It should be noted that the extending direction of the outer end of the slot in the circumferential direction may be clockwise or counterclockwise, and the corresponding extending direction in the tiled unfolded schematic diagram is leftward or rightward.

As shown in fig. 7 and 8, the third and fourth slot outer ends 21 and 25 of the second hairpin coil 20 of any one of the fourth segmented coil units 240 extend in opposite directions and away from each other in the circumferential direction. Illustratively, as shown in fig. 8, the third slot outer end 21 of the second hairpin coil 20 of the third segmented coil unit 230 extends leftward in the circumferential direction, and the fourth slot outer end 25 extends rightward in the circumferential direction.

As shown in fig. 7 and 8, the outer ends of the slots in the second segmented coil assembly 200 are distributed in two layers along the radial direction, and the outer ends of the slots in the same layer extend in the same circumferential direction. Fig. 8 exemplarily shows a tiled development schematic diagram of the U-phase winding in the case where the motor winding includes two first segmented coil windings and one second segmented coil winding, where the out-of-slot portions of the second segmented coil winding are located in five layers and six layers, and the in-slot portions of the second segmented coil winding are located in five layers.

As shown in fig. 8, the third and fourth slot outer ends 21 and 25 of the second hairpin coils 20 in all the third segmented coil units 230 and the fourth slot outer ends 25 of the second hairpin coils 20 in all the fourth segmented coil units 240 are equal in span in the circumferential direction; the third slot outer ends 21 of the second hairpin coils 20 in all the fourth segment-type coil units 240 are equal in span in the circumferential direction; the sum of the spans in the circumferential direction of the third and fourth slot outer ends of the second hairpin coil 20 in the fourth segmented coil unit 240 is equal to 6 slot pitches.

As shown in fig. 8, the second split-type coil assembly 200 and the outer end of the nearest first split-type coil assembly 100 are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer ends of the slots in the second layer and the third layer are opposite in the circumferential direction, and the sum of the circumferential span of the outer end of one slot in the second layer and the circumferential span of the outer end of one slot in the third layer is equal to Y slot pitches. Illustratively, referring to fig. 1, 6, 7, and 8, if X is 8 and Y is 5, the slot outer ends of the second segment-type coil groups are located in five and six layers, the slot outer ends of the first segment-type coil group most adjacent to the second segment-type coil group are located in three and four layers, the slot outer ends located in four and five layers in fig. 8 correspond to the slot outer ends located in the second and third layers in the second segment-type coil group 200 and the first segment-type coil group 100 most adjacent thereto, the span of one slot outer end located in four layers in fig. 8 is equal to 2.5d in the circumferential direction, and the span of one slot outer end located in five layers in fig. 8 is equal to 2.5d in the circumferential direction, so that the sum of the span of one slot outer end located in four layers in fig. 8 and the span of one slot outer end located in five layers in the circumferential direction is equal to 5 d.

As shown in fig. 1, 3, 6 and 7 in combination, in the second split coil assembly 200 and the at least one first split coil assembly 100, the first out-of-slot turns 13 of all the first hairpin coils 10 and the second out-of-slot turns 23 of all the second hairpin coils 20 are located at one side of the motor, and the first out-of-slot ends 11 and the second out-of-slot ends 15 of all the first hairpin coils 10 and the third out-of-slot ends 21 and the fourth out-of-slot ends 25 of all the second hairpin coils 20 are located at the other side of the motor.

Fig. 7 and 8 exemplarily show the case where X is 8. Through set up third segmentation coil unit in every phase winding, can two liang of four parallel branches of each phase winding that will at least one first segmentation coil winding forms are established ties, form two parallel branches, and then reduce the use of busbar.

An embodiment of the utility model provides a motor winding of another kind. Fig. 9 is a schematic structural diagram of a second segmented coil assembly according to an embodiment of the present invention. Fig. 10 is a schematic view illustrating a tiled development of a phase winding of another motor winding according to an embodiment of the present invention. Fig. 9 and 10 illustrate the case where the motor winding includes two first segmented coil windings and one second segmented coil winding, X being 6. Illustratively, referring to fig. 1, 6, 9, and 10, if X is 6 and Y is 7, the slot outer ends of the second segment-type coil groups are located in five and six layers, the slot outer ends of the first segment-type coil group most adjacent to the second segment-type coil group are located in three and four layers, the slot outer ends located in four and five layers in fig. 10 correspond to the slot outer ends located in the second and third layers in the first segment-type coil group 100 most adjacent to the second segment-type coil group 200, the span of one slot outer end located in four layers in fig. 10 is equal to 3.5d in the circumferential direction, the span of one slot outer end located in five layers in fig. 10 is equal to 3.5d in the circumferential direction, and thus the sum of the span of one slot outer end located in four layers in fig. 8 and the span of one slot outer end located in five layers in the circumferential direction is equal to 7 d.

Alternatively, on the basis of the above-described embodiment, referring to the five-layer and six-layer structures of fig. 8 or 10, in the second segmented coil group, the segmented coil unit for forming the same phase winding includes: and 1 third segmented coil unit 230 and N/2/3-1 fourth segmented coil unit 240, wherein the segmented coil units for forming the same phase winding are sequentially arranged along the circumferential direction, and in two adjacent segmented coil units, the span of the third in-slot portions 22 of the two second hairpin coils with the largest pitch in the circumferential direction is 12 slot pitches, and the span of the fourth in-slot portions 24 of the two second hairpin coils with the largest pitch in the circumferential direction is 12 slot pitches.

Referring to the five and six layer structure of fig. 8 or fig. 10, the third in-slot portions 22 of the 2 second hairpin coils of any one second segmented coil unit are located in the adjacent 2 slots, and the fourth in-slot portions 24 of the 2 second hairpin coils of any one second segmented coil unit are located in the adjacent 2 slots.

Alternatively, on the basis of the above-described embodiments, as shown in fig. 1 to 10, the first outer slot end 11, the second outer slot end 15, the third outer slot end 21, and the fourth outer slot end 15 each have an extension end 16, and the 6 first segment coil units of the first segment coil assembly 100 away from the second segment coil assembly 200 and the extension ends 16 away from the outer slot end of the second segment coil assembly 200 are used as connection ends. Illustratively, as shown in fig. 4, 5, 8 and 10, the connection end may include: a U1 phase outgoing line, a U2 phase outgoing line, a U3 phase outgoing line, a U4 phase outgoing line, a U1 phase neutral point, a U2 phase neutral point, a U3 phase neutral point and a U4 phase neutral point.

In any of the first segmented coil groups 100, two extending ends located in the same radial direction are connected, except for the extending end located in the same radial direction as the extending end 16 serving as the connecting end. In any of the second segmented coil groups 200, two extending ends 16 located in the same radial direction among the remaining extending ends 16 are connected, except for the extending end 16 located in the same radial direction as the extending end 16 serving as a connecting end. The extending ends 16 located in the same radial direction as the extending ends 16 as the connecting ends are connected to each adjacent two of the extending ends 16 except the extending ends 16 as the connecting ends.

Wherein the electrical connection of the extension ends is achieved by soldering. The neutral point and the outgoing line are connected through a bus bar, a bus bar and the like, so that the parallel branches in each phase winding are connected in series or in parallel, and the star-shaped or triangular connection relation of the three-phase windings is realized.

Optionally, on the basis of the above-described embodiment, as shown in fig. 1 and fig. 3, the first in-slot portions 12 of the 2 first hairpin coils 10 of any first segmented coil unit 110 are located in the adjacent 2 slots of the same layer, and the second in-slot portions 14 of the 2 first hairpin coils 10 of any first segmented coil unit 110 are located in the adjacent 2 slots of the same layer.

As shown in fig. 1 and fig. 3, in each first segmented coil group 100, the first in-slot portions 12 of the 2 first hairpin coils 10 of the nth first segmented coil unit 110 and the first in-slot portions 12 of the 2 first hairpin coils 10 of the (N + 1) th first segmented coil unit 110 are located in 4 adjacent slots of the same layer, and the second in-slot portions 12 of the 2 first hairpin coils 10 of the nth first segmented coil unit 110 and the second in-slot portions 12 of the 2 first hairpin coils 10 of the (N + 1) th first segmented coil unit 10 are located in 4 adjacent slots of the same layer, where N is an integer and N is 1, 2 … … N-1, and N is an integer.

Referring to fig. 1 and 3, in each first segment coil assembly 100, the first in-slot portions 12 of the 2 first hairpin coils 10 of the nth first segment coil unit 110 and the first in-slot portions 12 of the 2 first hairpin coils 10 of the 1 st first segment coil unit 110 are located in 4 adjacent slots of the same layer, and the second in-slot portions 12 of the 2 first hairpin coils 10 of the nth first segment coil unit 110 and the second in-slot portions 12 of the 2 first hairpin coils 10 of the 1 st first segment coil unit 110 are located in 4 adjacent slots of the same layer.

It should be noted that, if the motor winding includes only the first segmented coil winding, the in-slot portions are arranged in even number layers along the radial direction, and each phase of winding includes four parallel branches. If the motor winding comprises a first sectional coil winding and a second sectional coil winding, the in-slot parts are distributed in odd layers along the radial direction, and each phase of winding comprises two parallel branches. The extending directions of the outer end parts of the slots of two adjacent layers in the motor winding are opposite.

An embodiment of the utility model provides a motor stator. As shown in fig. 1, 2 and 3, the stator of the motor includes: stator core 1 with the utility model discloses the motor winding that the arbitrary embodiment provided, stator core 1 are provided with a plurality of along circumference arrangement and along axially extended groove 2, and first inslot portion 12 and the second inslot portion 14 of first hairpin coil 10 are located groove 2.

Wherein the motor may be a permanent magnet motor or an asynchronous alternating current motor. The embodiment of the utility model provides a motor stator includes the motor winding in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor stator also possesses the beneficial effect that the above-mentioned embodiment described, and this is no longer repeated here.

Fig. 11 is a schematic structural diagram of another motor stator according to an embodiment of the present invention. Fig. 12 is a schematic structural diagram of another motor stator according to an embodiment of the present invention. Fig. 13 is a schematic structural diagram of another motor stator according to an embodiment of the present invention. If the motor winding comprises at least one first segmented coil group, the parts in the slots are distributed in even layers, and the neutral points of 4 parallel branches in each phase winding can be connected by adopting a bus bar, as shown in fig. 11; alternatively, two bus bars are used for connection, as shown in fig. 12; alternatively, four buss bar connections are used, as shown in FIG. 13. If the motor winding comprises at least one first segmented coil group and one second segmented coil group, the in-slot parts are distributed in odd layers, and neutral points of 2 parallel branches in each phase winding can be connected by adopting a bus bar, as shown in fig. 6; alternatively, two bus bars are used for connection.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A motor winding, wherein the number of phases of the motor winding is 3, the motor winding comprising:

at least one first segmented coil set;

each first sectional coil group comprises N first sectional coil units, and each first sectional coil unit comprises 2 first hairpin coils with different pitches, wherein N is more than or equal to 6, N is a multiple of 3, and N is an integer; any of the first hairpin coils includes: the first card sending coil comprises a first out-of-slot end part, a first in-slot part, a first out-of-slot turning part, a second in-slot part and a second out-of-slot end part which are sequentially connected, wherein the first in-slot part and the second in-slot part are positioned in different slots, the extending directions of the first out-of-slot end part and the second out-of-slot end part in the circumferential direction are opposite and far away, and 2 first card sending coils with different pitches are concentrically arranged;

in any first sectional coil unit, the pitch of the first in-slot portion and the second in-slot portion of the first hairpin coil having the largest pitch in the circumferential direction is equal to X slot pitches;

the N first sectional coil units of each first sectional coil group are sequentially arranged along the circumferential direction, and the parts in the Nx 2 slots are distributed in two adjacent layers along the radial direction; in any first sectional coil group, the first in-slot parts and the first out-slot parts of all the first hairpin coils are located in the same layer, the second in-slot parts and the second out-slot parts of all the first hairpin coils are located in the same layer, and the first in-slot parts and the second in-slot parts of all the first hairpin coils are located in different layers;

in each first segmented coil group, the circumferential spans of the first groove outer ends of all the first hairpin coils are equal, the circumferential spans of the second groove outer ends of all the first hairpin coils are equal, and the sum of the circumferential spans of the first groove outer ends of the first hairpin coils and the circumferential span of the second groove outer ends of the first hairpin coils is Y groove intervals, wherein X + Y is 13, and X is 8 or 6;

the first out-of-slot turning parts of all the first hairpin coils of the at least one first sectional coil group are positioned at one side of the motor, and the first out-of-slot end parts and the second out-of-slot end parts of all the first hairpin coils of the at least one first sectional coil group are positioned at the other side of the motor.

2. The winding of an electrical machine of claim 1, wherein the number of the first segmented coil groups is at least two, and the at least two first segmented coil groups are arranged in a radially surrounding manner;

the outer end parts of the slots in the two adjacent first sectional coil groups are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer end parts of the slots on the second layer and the third layer in the circumferential direction are opposite, and the sum of the circumferential span of the outer end part of one slot on the second layer and the circumferential span of the outer end part of one slot on the third layer is equal to Y slot intervals.

3. An electric machine winding according to claim 1, wherein in each of the first segmented coil groups, a span in a circumferential direction of the first slot outer end portion of any one of the first hairpin coils is equal to a span in a circumferential direction of the second slot outer end portion.

4. The electrical machine winding as recited in claim 1, wherein in each of the first split coil sets, a span in a circumferential direction of an outer end of the first slot of any of the first hairpin coils is not equal to a span in a circumferential direction of an outer end of the second slot.

5. The electrical machine winding of claim 1, further comprising: the second segmented coil group and the at least one first segmented coil group are arranged in a surrounding manner along the radial direction, and the second segmented coil group is positioned at the outermost side or the innermost side;

wherein the second segmented coil set comprises: n/2 second segmented coil units, wherein any second segmented coil unit comprises 2 second hairpin coils with different pitches;

any one of the second card sending coils includes: the third slot outer end part, the third slot inner part, the second slot outer turning part, the fourth slot inner part and the fourth slot outer end part are sequentially connected, the third slot inner part and the fourth slot inner part are positioned in different slots, and 2 second hairpin coils with different pitches are concentrically arranged; in any of the second segmented coil units, the pitch of the third in-slot portion and the fourth in-slot portion of the second hairpin coil having the largest pitch in the circumferential direction is equal to 7 slot pitches;

n/2 second sectional coil units of the second sectional coil group are sequentially arranged along the circumferential direction, and parts in the Nx 2 grooves are distributed in a single layer along the radial direction;

in the second sectional coil group, the N/2 second sectional coil units are 3 third sectional coil units and N/2-3 fourth sectional coil units;

the extension directions of the outer end part of a third slot and the outer end part of a fourth slot of a second hairpin coil of any one third sectional coil unit in the circumferential direction are the same;

the extension directions of the third slot outer end part and the fourth slot outer end part of the second hairpin coil of any fourth sectional coil unit in the circumferential direction are opposite and far away;

the outer end parts of the slots in the second sectional coil group are distributed in two layers along the radial direction, and the extending directions of the outer end parts of the slots in the same layer in the circumferential direction are the same;

the spans of the third and fourth slot outer ends of the second hairpin coils in all the third sectional coil units and the fourth slot outer ends of the second hairpin coils in all the fourth sectional coil units in the circumferential direction are equal; the spans of the outer ends of the third slots of the second hairpin coils in all the fourth sectional coil units in the circumferential direction are equal; the sum of the circumferential spans of the third slot outer end and the fourth slot outer end of the second hairpin coil in the fourth segmented coil unit is equal to 6 slot pitches;

the second segmented coil group and the outer end part of the groove of the first segmented coil group which is most adjacent to the second segmented coil group are distributed in four layers from inside to outside along the radial direction, the extending directions of the outer end parts of the grooves on the second layer and the third layer are opposite in the circumferential direction, and the sum of the circumferential span of the outer end part of the groove on the second layer and the circumferential span of the outer end part of the groove on the third layer is equal to Y groove intervals;

in the second segmented coil group and the at least one first segmented coil group, the first out-of-slot turning parts of all the first hairpin coils and the second out-of-slot turning parts of all the second hairpin coils are positioned at one side of the motor, and the first out-of-slot end parts and the second out-of-slot end parts of all the first hairpin coils and the third out-of-slot end parts and the fourth out-of-slot end parts of all the second hairpin coils are positioned at the other side of the motor.

6. The electrical machine winding of claim 5, wherein the segmented coil units for forming the same phase winding in the second segmented coil group comprise: the segmented coil units used for forming the same phase winding are sequentially arranged along the circumferential direction, in two adjacent segmented coil units, the span of the third in-slot parts of the second hairpin coils with the largest two pitches in the circumferential direction is 12 slot pitches, and the span of the fourth in-slot parts of the second hairpin coils with the largest two pitches in the circumferential direction is 12 slot pitches;

the third in-slot parts of the 2 second hairpin coils of any one second segmented coil unit are positioned in the adjacent 2 slots, and the fourth in-slot parts of the 2 second hairpin coils of any one second segmented coil unit are positioned in the adjacent 2 slots.

7. The winding of claim 5, wherein the first, second, third and fourth out-of-slot ends each have an extension end, and wherein the 6 first segmented coil units of the first segmented coil group away from the second segmented coil group have the extension ends away from the out-of-slot ends of the second segmented coil group as connection ends,

in any one of the first segmented coil groups, two extending ends positioned in the same radial direction are connected in the other extending ends except the extending end positioned in the same radial direction as the extending end serving as the connecting end;

in any of the second segmented coil groups, two extending ends positioned in the same radial direction in the remaining extending ends except the extending end positioned in the same radial direction as the extending end serving as the connecting end are connected;

and the extending ends which are positioned in the same radial direction as the extending ends as the connecting ends are connected, and every two adjacent extending ends are connected in the other extending ends except the extending ends as the connecting ends.

8. An electric machine winding according to claim 1, wherein the first in-slot portions of the 2 first hairpin coils of any one of the first segmented coil units are located in adjacent 2 slots of the same layer, and the second in-slot portions of the 2 first hairpin coils of any one of the first segmented coil units are located in adjacent 2 slots of the same layer;

in each first segmented coil group, the first in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the first in-slot portions of the 2 first hairpin coils of the (N + 1) th first segmented coil unit are located in adjacent 4 slots of the same layer, and the second in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the second in-slot portions of the 2 first hairpin coils of the (N + 1) th first segmented coil unit are located in adjacent 4 slots of the same layer, wherein N is 1, 2 … … N-1, and N is an integer;

in each first segmented coil group, the first in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the first in-slot portions of the 2 first hairpin coils of the 1 st first segmented coil unit are located in adjacent 4 slots of the same layer, and the second in-slot portions of the 2 first hairpin coils of the nth first segmented coil unit and the second in-slot portions of the 2 first hairpin coils of the 1 st first segmented coil unit are located in adjacent 4 slots of the same layer.

9. A motor winding according to claim 1, wherein the number of slots per pole per phase of the motor winding is 2.

10. An electric machine stator, comprising: a stator core and a motor winding according to any of claims 1-9, the stator core being provided with a plurality of circumferentially arranged and axially extending slots, the first in-slot portion and the second in-slot portion of the first hairpin coil being located within the slots.

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