CN217720862U - Motor flat wire stator and motor - Google Patents

Abstract

The application provides a motor flat wire stator and a motor, wherein the motor flat wire stator comprises a stator core and a coil group, and the stator core comprises 2K layers of winding layers surrounding the axis of the stator core; the 2K layers of winding layers at least comprise a first winding layer positioned at the outermost layer and a second winding layer positioned at the innermost layer; the coil group comprises a forward winding segment, a reverse winding segment and a special-shaped coil, wherein the forward winding segment, the reverse winding segment and the special-shaped coil are inserted into the stator slots of the winding layer in a penetrating mode, and the forward winding segment and the reverse winding segment are connected through the special-shaped coil. This application sets up reverse winding section backwind, can concentrate on same radial side and the same winding layer of stator core with the tail end of reverse winding section and the head end of forward winding section like this to make things convenient for follow-up bonding wire, improve the production efficiency of motor flat wire stator.

Description

Motor flat wire stator and motor

Technical Field

The utility model belongs to the technical field of the automotive motor technique and specifically relates to a motor flat wire stator is related to.

Background

A stator of a vehicle motor generally includes a stator core and a coil assembly. The coil group is inserted in a stator slot of the stator core and wound on the stator core according to a specific mode, and a magnetic field is generated after the coil group is electrified. The existing vehicle motor is complex in winding process and low in production efficiency, and is limited by a winding mode, the wiring terminals of the existing vehicle motor are generally arranged on different radial sides of a stator core, during wire welding, the wiring terminal on one side needs to be welded firstly, then the vehicle motor is rotated, and the wiring terminals on other sides are welded, so that the wire welding process is complex, and the production efficiency is further reduced.

Therefore, it is necessary to provide a technical solution with high production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor flat wire stator and motor, its production efficiency is higher.

The utility model adopts the technical scheme as follows:

a motor flat wire stator comprises a stator core and at least one coil group, wherein the stator core is provided with a plurality of stator slots, the stator slots penetrate through the stator core along the axial direction of the stator core, the plurality of stator slots form 2K layers of winding layers surrounding the axis of the stator core, the 2K layers of winding layers are sequentially arranged along the radial direction of the stator core, and K is a positive integer; the 2K layers of the winding layers at least comprise a first winding layer positioned at the outermost layer and a second winding layer positioned at the innermost layer;

the coil group comprises a forward winding segment, a reverse winding segment and a special-shaped coil; the forward winding segments are alternately inserted into the stator slots of the stator core up and down and are alternately inserted into the adjacent winding layers, and the head ends and the tail ends of the forward winding segments are positioned outside the stator slots; the orthographic projection formed by the extending track of the forward winding segment on the end face of the stator core is in a spiral shape extending from the second winding layer to the first winding layer; the reverse winding segments are alternately inserted into the stator slots of the stator core up and down and are alternately inserted into the adjacent winding layers, and the head ends and the tail ends of the reverse winding segments are positioned outside the stator slots; the orthographic projection of the extending track of the reverse winding segment on the end face of the stator core is in a spiral shape extending from the first winding layer to the second winding layer; the head end of the forward winding segment and the tail end of the reverse winding segment are positioned on the same axial side of the stator core and on the same winding layer;

the special-shaped coil is U-shaped and comprises a left insertion section, a left torsion end, a right insertion section and a right torsion end; the left inserting section and the right inserting section are inserted into the first winding layer or the second winding layer, and the left twisting end and the right twisting end are located outside the stator slot; the left torsion end is connected with the left insertion section and obliquely extends along the circumferential direction of the stator core, the right torsion end is connected with the right insertion section and obliquely extends along the circumferential direction of the stator core, and the oblique direction of the right torsion end is the same as that of the left torsion end; one of the left and right twisted ends is connected to a trailing end of the forward winding segment, and the other of the left and right twisted ends is connected to a leading end of the reverse winding segment.

In one embodiment, the distance between the left insertion section and the right insertion section is D1, the distance corresponding to D1 is N-1 slot pitch or N +1 slot pitch, N is the pole pitch of the motor, and the motor is provided with a motor flat wire stator.

In one embodiment, the stator core is provided with a plurality of stator slot groups, each of the stator slot groups is formed by sequentially arranging a plurality of stator slots along the radial direction of the stator core, and all the stator slot groups comprise a plurality of first stator slot groups, a plurality of second stator slot groups and a plurality of third stator slot groups; the plurality of first stator slot groups are arranged along the circumferential direction of the stator core; the plurality of second stator slot groups are arranged along the circumferential direction of the stator core; the plurality of third stator slot groups are arranged along the circumferential direction of the stator core;

the number of the coil groups is multiple; the coil sets comprise a first coil set, a second coil set and a third coil set, wherein the first coil set forms a U-phase coil of the motor flat wire stator, the second coil set forms a V-phase coil of the motor flat wire stator, the third coil set forms a W-phase coil of the motor flat wire stator, the first coil set is inserted into the stator slots of the first stator slot sets, the second coil set is inserted into the stator slots of the second stator slot sets, and the third coil set is inserted into the stator slots of the third stator slot sets.

In an embodiment, the forward winding section includes a plurality of first U-shaped coils, the plurality of first U-shaped coils are sequentially arranged and sequentially connected along a circumferential direction of the stator core, each of the first U-shaped coils includes a left slot section and a right slot section for inserting the stator slot, and the left slot section and the right slot section are respectively inserted into the adjacent winding layers.

In an embodiment, the distance between the left slot section and the right slot section is D, D includes D2 and D3, the distance corresponding to D2 is N-1 slot pitches, the distance corresponding to D3 is N +1 slot pitches, where N is the pole pitch of the motor, and the motor is provided with a motor flat wire stator.

In an embodiment, the upper end of the left slot segment extends away from the right slot segment, and the upper end of the right slot segment extends away from the left slot segment; the first U-shaped coil further comprises a left outer end and a right outer end which are positioned outside the stator slot; the left outer end is connected with the upper end of the left slot section; the right outer end is connected with the upper end of the right slot section; and the adjacent two first U-shaped coils are connected in a mode of welding the left outer end and the right outer end.

In an embodiment, the reverse winding section includes a plurality of second U-shaped coils, the plurality of second U-shaped coils are sequentially arranged and sequentially connected in the circumferential direction of the stator core, and the second U-shaped coils have the same structure as the first U-shaped coils.

A motor comprises the motor flat wire stator.

The utility model has the advantages that:

compared with the prior art, this application sets up reverse winding section backwind to forward winding section and reverse winding section are connected through a special-shaped coil, concentrate on the second winding layer of inlayer with the tail end of reverse winding section and the head end of forward winding section with such mode, and concentrate on stator core's same radial side, thereby make things convenient for follow-up tail end at reverse winding section and the head end bonding wire of forward winding section, improve the production efficiency of motor flat wire stator.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic perspective view of a stator core according to an embodiment of the present invention;

fig. 2 is a schematic end face structure diagram of a stator core according to an embodiment of the present invention;

fig. 3 is a schematic view of a combination relationship between a stator core and a coil assembly in a tiled state according to an embodiment of the present invention;

fig. 4 is a schematic view of a combination relationship between the stator core and the forward winding segment and the reverse winding segment in a tiled state according to the embodiment of the present invention;

fig. 5 is a schematic view of a combined structure of the forward winding segment and the special-shaped coil according to the embodiment of the present invention;

fig. 6 is a schematic view of a combined structure of the reverse winding segment and the special-shaped coil according to the embodiment of the present invention.

Reference is made to the accompanying drawings in which:

10. a stator core; 11. a first winding layer; 12. a second winding layer; 13. a stator slot;

21. a first U-shaped coil; 211. a left slot section; 212. a right slot section; 213. a left outer end; 214. a right outer end; 215. a connecting section; 22. a second U-shaped coil; 27. a special-shaped coil; 271. a left splicing section; 272. a right plug section; 273. a left torsion end; 274. a right twist end;

50. a terminal;

60. a first stator slot group;

70. a second stator slot group;

80. a third stator slot group.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

The embodiment provides a motor, its main application in new energy automobile, motor include the motor flat wire stator. Fig. 1 of the present embodiment shows a three-dimensional structure of a motor flat wire stator, and fig. 2 of the present embodiment shows an end face structure of the motor flat wire stator; fig. 3 of the present embodiment shows the positional relationship of the stator core 10 with the coil groups in a laid state. Referring to fig. 1-3, the flat wire stator of the motor includes a stator core 10 and at least one coil assembly. The stator core 10 is provided with a plurality of stator slots 13, the stator slots 13 penetrate through the stator core 10 along the axial direction of the stator core 10, the plurality of stator slots form 2K layers of winding layers surrounding the axial line of the stator core 10, the number of the stator slots 13 of each winding layer is the same, and the stator slots 13 of each winding layer are aligned one by one in the radial direction of the stator core 10. The 2K layers of windings are sequentially arranged along the radial direction of the stator core 10, K is a positive integer, preferably, K is 3, and the number of the winding layers is 6. The 6 winding layers at least include a first winding layer 11 located at the outermost layer and a second winding layer 12 located at the innermost layer.

Next, the structure of the coil assembly will be explained.

In the present embodiment, the coil group includes a forward winding segment, a reverse winding segment, and a U-shaped coil 2727.

The head end and the tail end of the forward winding segment are respectively arranged on the second winding layer 12 and the first winding layer 11, and in other embodiments, the head end and the tail end of the forward winding segment can also be respectively arranged on the first winding layer and the second winding layer 12; in this embodiment, the leading and trailing ends of the forward winding wire segment are exposed outside of the stator slot 13, which facilitates wire bonding of the leading end of the forward winding wire segment or facilitates connection of the trailing end of the forward winding wire segment to the reverse winding wire segment. The forward winding segments are alternately inserted into the stator slots 13 of the stator core 10 in a wave shape from top to bottom (referring to the top-bottom direction in fig. 1), and the forward winding segments are also alternately inserted into the stator slots 13 of the adjacent winding layers, so that the extending track of the forward winding segments between the two adjacent winding layers is in a zigzag shape from the end surface perspective of the stator core 10, specifically, referring to fig. 4, fig. 4 exemplarily shows the extending track of the forward winding segments on the stator core 10, the forward winding segment sequentially passes through U1-1, U1-2, U1-3, U1-4, U1-5, U1-6, U1-7, U1-8, U1-9, U1-10, U1-11, U1-12, U1-13, U1-14, U1-15, U1-16, U1-17, U1-18, U1-19, U1-20, U1-21, U1-22 and U1-23, wherein U1-1, U1-2, U1-3, U1-4, U1-5, U1-6, U1-7, U1-8, U1-9, U1-10, U1-11, U1-12, U1-13, U1-14, U1-15, U1-16, U1-17, U1-18, U1-19, U1-20, U1-21, U1-23 and corresponds to one stator slot respectively. Further, as a whole, an orthogonal projection of the extending locus of the entire forward winding segment formed on the end face of the stator core 10 (the end face of the stator core shown in fig. 2) has a spiral shape extending from the second winding layer 12 to the first winding layer 11.

In this embodiment, the head end and the tail end of the reverse winding segment are respectively inserted into the first winding layer 11 and the second winding layer 12, and in other implementations, when the head end and the tail end of the forward winding segment are respectively arranged on the first winding layer and the second winding layer 12, the head end and the tail end of the reverse winding segment are respectively arranged on the second winding layer and the first winding layer 11. In this embodiment, the leading end and the trailing end of the reverse winding segment are exposed outside the stator slot 13, which facilitates wire bonding of the trailing end of the reverse winding segment or connection of the leading end of the reverse winding segment to the forward winding segment. The reverse winding segments are alternately inserted into the stator slots 13 of the stator core 10 in a wave shape from top to bottom (referring to the top-bottom direction in fig. 1), and the reverse winding segments are alternately inserted into the stator slots 13 of the adjacent winding layers, so that the extending track of the reverse winding segments between the two adjacent winding layers is in a zigzag shape when viewed from the end face of the stator core 10, specifically, as shown in fig. 4, the reverse winding segments sequentially pass through U1-26, U1-27, U1-28, U1-29, U1-30, U1-31, U1-32, U1-33, U1-34, U1-35, U1-36, U1-37, U1-38, U1-39, U1-40, U1-41, U1-42, U1-43, U1-44, U1-45, U1-46, U1-47, and U1-48; wherein, U1-26, U1-27, U1-28, U1-29, U1-30, U1-31, U1-32, U1-33, U1-34, U1-35, U1-36, U1-37, U1-38, U1-39, U1-40, U1-41, U1-42, U1-43, U1-44, U1-45, U1-46, U1-47, U1-48 correspond to the position of a stator slot 13 respectively. Further, when viewed as a whole, an orthogonal projection of the extending locus of the reverse winding segment formed on the end face of the stator core 10 (the end face of the stator core shown in fig. 2) is in a spiral shape extending from the first winding layer 11 to the second winding layer 12.

Specifically, the head end of the forward winding wire segment and the tail end of the reverse winding wire segment are located on the same axial side of the stator core 10 and on the same winding layer, and are located on the second winding layer 12, in fig. 4, the head end of the forward winding wire segment is located at a position corresponding to U1-1, the tail end of the reverse winding wire segment is located at a position corresponding to U1-48, the tail end of the forward winding wire segment and the head end of the reverse winding wire segment are located on the first winding layer 11, in fig. 4, the tail end of the forward winding wire segment is located at a position corresponding to U1-24, the head end of the reverse winding wire segment is located at a position corresponding to U1-25, the special-shaped coil 27 is inserted into the stator slot 13 of the first winding layer 11, and the tail end of the forward winding wire segment and the head end of the reverse winding wire segment are connected by the special-shaped coil 27, in other embodiments, the head end of the forward winding wire segment and the tail end of the reverse winding wire segment are located on the second winding layer 12, and the special-shaped coil 27 is inserted into the second winding layer 12.

Compared with the prior art, the reverse winding segment is arranged to be wound back in the embodiment, so that the head end of the forward winding segment and the tail end of the reverse winding segment can be concentrated on the same axial side and the same winding layer of the stator core 10, the head end of the forward winding segment and the tail end of the reverse winding segment are respectively provided with the wiring terminal 50 (please combine with the drawing 1), in the subsequent process of welding the conducting wire to the wiring terminal 50, after the conducting wire of one wiring terminal 50 is welded, the conducting wire can be welded to the other wiring terminal 50 without turning over the stator core 10, or the conducting wire can be welded to the other wiring terminal 50 without moving the welding equipment in a long distance, so that the production efficiency of the flat wire stator of the motor can be improved, and in addition, the structure compactness degree of the stator core 10 can be improved.

In the present embodiment, the stator slots 13 into which the forward winding segments and the reverse winding segments are inserted are different, so that the utilization rate of the stator slots 13 can be increased, and the utilization rate of the stator slots 13 can be increased.

Referring to fig. 2, the stator core 10 of the present embodiment is provided with a plurality of stator slot groups, each of which is formed by sequentially arranging a plurality of stator slots 13 along a radial direction of the stator core 10 (the radial direction refers to the radial direction of the stator core 10 in fig. 2), and referring to fig. 3, fig. 3 shows a tiled and unfolded state of the stator core 10, and shows a combination relationship between the stator slot groups and the coil groups. As shown in fig. 3, among all the stator slot groups, a plurality of first stator slot groups 60, a plurality of second stator slot groups 70, and a plurality of third stator slot groups 80 are included; a plurality of first stator slot groups 60 are arranged in the circumferential direction of the stator core 10 (the circumferential direction here refers to the stator core 10 circumferential direction in fig. 2); a plurality of second stator slot groups 70 are arranged in the circumferential direction of the stator core 10 (the circumferential direction here refers to the stator core 10 circumferential direction in fig. 2); a plurality of third stator slot groups 80 are arranged along the circumferential direction of the stator core 10 (the circumferential direction here refers to the circumferential direction of the stator core 10 in fig. 2); further, referring to fig. 3, each first stator slot group 60, each second stator slot group 70, and each third stator slot group 80 are arranged alternately and alternatively, that is, one or more second stator slot groups 70 may be arranged between two first stator slot groups 60, one or more third stator slot groups 80 may be arranged between two first stator slot groups 60, or other similar arrangements, which are not exhaustive here.

In this embodiment, the number of the coil groups is three, and the three coil groups include a first coil group, a second coil group, and a third coil group. The first coil group constitutes a U-phase coil of the motor, the second coil group constitutes a V-phase coil of the motor, and the third coil group constitutes a W-phase coil of the motor, and thus, the motor of the present embodiment is a three-phase motor. Referring to fig. 3, in the present embodiment, the first coil group is inserted into the stator slots 13 of the first stator slot groups 60, the second coil group is inserted into the stator slots 13 of the second stator slot groups 70, and the third coil group is inserted into the stator slots 13 of the third stator slot groups 80.

According to the scheme, the stator slots 13 of the first stator slot group 60 are only used for inserting the first coil group, the stator slots 13 of the second stator slot group 70 are only used for inserting the second coil group, and the stator slots 13 of the third stator slot group 80 are only used for inserting the third coil group, so that the conductors inserted in the stator slots 13 of the first stator slot group 60 are in the same phase, no interlayer insulation paper needs to be arranged between the adjacent stator slots 13 of the same first stator slot group 60, and by analogy, no interlayer insulation paper needs to be arranged between the adjacent stator slots 13 of the same second stator slot group 70, and no interlayer insulation paper needs to be arranged between the adjacent stator slots 13 of the same third stator slot group 80, so that the process of arranging the interlayer insulation paper is omitted, the production efficiency is improved, and the raw materials are saved.

Next, the structure of the normal winding section and the reverse winding section will be described.

Referring to fig. 4 and 5, fig. 4 shows the extending traces of the forward winding segment and the backward winding segment, and fig. 5 shows the connection relationship between the forward winding segment and the shaped coil 27.

Referring to fig. 5, the forward winding segment includes a plurality of first U-shaped coils 21, the plurality of first U-shaped coils 21 are sequentially arranged along the circumferential direction of the stator core 10 and are sequentially connected, each first U-shaped coil 21 includes a left slot segment 211 and a right slot segment 212 for inserting the stator slot 13, the left slot segment 211 and the right slot segment 212 are respectively inserted into adjacent winding layers, for example, referring to fig. 4, the left slot segment 211 and the right slot segment 212 located in the same first U-shaped coil 21 are divided into winding layers inserted into U1-1 and U1-2, the left slot segment 211 and the right slot segment 212 of another first U-shaped coil 21 are respectively inserted into winding layers inserted into U1-3 and U1-4, and the left slot end and the right slot end of another first U-shaped coil 21 are inserted into another winding layer. The distance between the left slot segment 211 and the right slot segment 212 is D, D includes D2 and D3, that is, the value of D of different first U-shaped coils 21 may be different, for example, D2 and D3 may be provided, D2= N-1, that is, D2 corresponds to a distance of N-1 slot pitches, D3= N +1, that is, D3 corresponds to a distance of N +1 slot pitches, wherein a slot pitch refers to a distance corresponding to a predetermined number of stator slots spanned in the circumferential direction of the stator core 10, for example, when a slot pitch is 4, a distance spanned when 4 stator slots are spanned in the circumferential direction of the stator core 10, N is a pole pitch of the motor, N = Z/P, Z is the number of stator slots 13 of a single winding layer, P is a pole number of the motor, and N appearing hereinafter also represents a pole pitch of the motor.

The bottom ends of the left slot section 211 and the right slot section 212 are connected by a connection section 215. The first U-shaped coil 21 further includes a left outer end 213 and a right outer end 214 outside the stator slot 13, the upper end of the left slot section 211 extends toward the direction away from the right slot section 212, the left outer end 213 is connected to the upper end of the left slot section 211, the upper end of the right slot section 212 extends toward the direction away from the left slot section 211, and the right outer end 214 is connected to the upper end of the right slot section 212; two adjacent first U-shaped coils 21 are connected by welding the left outer end 213 and the right outer end 214, specifically, the terminal portion of the left outer end 213 and the terminal portion of the right outer end 214 are welded after being twisted together, the distance between the left outer end 213 and the lower end of the left slot section 211 is N/2, and the distance between the right outer end 214 and the lower end of the right slot section 212 is N/2. Referring to fig. 4, the left outer end 213 and the right outer end 214 of the forward winding segment are welded to form a combined end, and the positions of all the combined ends of the forward winding segment correspond to U1-3, U1-4, U1-5, U1-6, U1-7, U1-8, U1-9, U1-10, U1-11, U1-12, U1-13, U1-14, U1-15, U1-16, U1-17, U1-18, U1-19, U1-20, U1-21, U1-22, and U1-23 in fig. 4. The position of U1-1 corresponds to the position of the left outer end 213 of one of the first U-shaped coils 21, which left outer end 213 is soldered to one of the terminals 50.

Further, since the distance between the left outer end 213 and the lower end of the left slot section 211 is N/2, and the distance between the right outer end 214 and the lower end of the right slot section 212 is N/2, the stator slot 13 into which the left slot section 211 of the first U-shaped coil 21 is inserted is adjacent to the stator slot 13 corresponding to the left outer end 213 of the first U-shaped coil 21, and the stator slot 13 into which the right slot section 212 of the first U-shaped coil 21 is inserted is adjacent to the stator slot 13 corresponding to the right outer end 214 of the first U-shaped coil 21, for example, if the left outer end 213 of one of the first U-shaped coils 21 is located outside the stator slot 13 corresponding to U1-1, the stator slot 13 into which the left slot section 211 of the first U-shaped coil 21 is inserted is located on the same winding layer as the stator slot 13 corresponding to U1-1, and is adjacent to the stator slot 13 corresponding to U1-1; the right outer end 214 of the first U-shaped coil 21 is located outside the stator slot 13 corresponding to U1-2, and the stator slot 13 into which the right slot segment 212 of the first U-shaped coil 21 is inserted and the stator slot 13 corresponding to U1-2 are located in the same winding layer and adjacent to the stator slot 13 corresponding to U1-2.

Referring to fig. 6, fig. 6 shows a connection relationship between a reverse winding segment and the special-shaped coil 27, the reverse winding segment includes a plurality of second U-shaped coils 22, the plurality of second U-shaped coils 22 are sequentially arranged along the circumferential direction of the stator core 10 and are sequentially connected, and the structure of the second U-shaped coils 22 is the same as that of the first U-shaped coils 21, so that the structure of the second U-shaped coils 22 is not described herein, and a winding manner of the reverse winding segment is described below with reference to fig. 4. A left outer end 213 and a right outer end 214 of the reverse winding segment are twisted and welded to the combined ends, and the positions of all the combined ends of the reverse winding segment correspond to U1-26, U1-27, U1-28, U1-29, U1-30, U1-31, U1-32, U1-33, U1-34, U1-35, U1-36, U1-37, U1-38, U1-39, U1-40, U1-41, U1-42, U1-43, U1-44, U1-45, U1-46, U1-47, and U1-48 of fig. 4, which correspond to the left outer end of one of the second U-shaped coils 22 for connection to one of the terminals 50. The stator slot 13 into which the left slot section of the second U-shaped coil 22 is inserted is adjacent to the stator slot 13 corresponding to the left outer end of the second U-shaped coil 22, and the stator slot 13 into which the right slot section of the second U-shaped coil 22 is inserted is adjacent to the stator slot 13 corresponding to the right outer end of the second U-shaped coil 22, for example, if the left outer end of one of the second U-shaped coils 22 is located outside the stator slot 13 corresponding to U1-48, the stator slot 13 into which the left slot section of the second U-shaped coil 22 is inserted is located in the same winding layer as the stator slot 13 corresponding to U1-48, and is adjacent to the stator slot 13 corresponding to U1-48; the right outer end of the second U-shaped coil 22 is located outside the stator slots 13 corresponding to U1-47, and the stator slots 13 into which the right slot segments of the second U-shaped coil 22 are inserted and the stator slots 13 corresponding to U1-47 are located in the same winding layer and adjacent to the stator slots 13 corresponding to U1-47.

Next, the connection manner between the reverse winding segment, the forward winding segment, and the shaped coil 27 will be explained.

In the present embodiment, the special-shaped coil 27 has a U-shape, and the special-shaped coil 27 includes a left insertion section 271, a left twisted end 273, a right insertion section 272, and a right twisted end 274; the left insertion section 271 and the right insertion section 272 are inserted into the stator slot 13 of the first winding layer 11, and the left torsion end 273 and the right torsion end 274 are located outside the stator slot 13; the left torsion end 273 is connected to the left plug-in section 271 and extends obliquely along the circumferential direction of the stator core 10, the right torsion end 274 is connected to the right plug-in section 272 and extends obliquely along the circumferential direction of the stator core 10, and the oblique direction of the right torsion end 274 is the same as that of the left torsion end 273. The left torsion end 273 is connected to the tail end of the forward winding segment, specifically, the tail end of the forward winding segment may be formed by the left outer end 213 or the right outer end 214 of the first U-shaped coil 21, and the left torsion end 273 is welded to the left outer end 213 of the first U-shaped coil 21 after being twisted, or the left torsion end 273 is welded to the right outer end 214 of the first U-shaped coil 21 after being twisted. The right twisted end 274 is connected to the head end of the reverse winding segment, specifically, the head end of the reverse winding segment may be formed by the left outer end or the right outer end of the second U-shaped coil 22, and the right twisted end 274 is welded to the left outer end of the second U-shaped coil 22 after being twisted, or the right twisted end 274 is welded to the right outer end of the second U-shaped coil 22 after being twisted. As shown in FIG. 4, the left twisted end 273 of the shaped coil 27 corresponds to the position of U1-24 and the right twisted end 274 of the shaped coil 27 corresponds to the position of U1-25.

Further, the distance between the left plug section 271 and the right plug section 272 is D1, D1= N +1, D1 is N +1 slot pitch, or D1= N-1, D1 is N-1 slot pitch; and N is the polar distance of the motor.

As long as the idea created by the present invention is not violated, various different embodiments of the present invention can be arbitrarily combined, and all the embodiments should be regarded as the content disclosed by the present invention; the utility model discloses an in the technical concept scope, what carry out multiple simple variant and different embodiments to technical scheme goes on does not violate the utility model discloses the arbitrary combination of the thought of creation all should be within the scope of protection of the utility model.

Claims (8)

1. A motor flat wire stator comprises a stator core (10) and at least one coil group, wherein the stator core (10) is provided with a plurality of stator slots (13), the stator slots (13) penetrate through the stator core (10) along the axial direction of the stator core (10), the plurality of stator slots (13) form 2K layers of winding layers surrounding the axis of the stator core (10), the 2K layers of winding layers are sequentially arranged along the radial direction of the stator core (10), and K is a positive integer; the 2K layers of the winding layers at least comprise a first winding layer (11) positioned at the outermost layer and a second winding layer (12) positioned at the innermost layer; the method is characterized in that:

the coil group comprises a forward winding segment, a reverse winding segment and a special-shaped coil (27); the forward winding segments are alternately inserted into the stator slots (13) of the stator core (10) up and down and alternately inserted into the adjacent winding layers; the head end and the tail end of the forward winding wire section are positioned outside the stator slot (13); the orthographic projection of the extending track of the forward winding segment on the end face of the stator core (10) is in a spiral shape extending from the second winding layer (12) to the first winding layer (11); the reverse winding segments are alternately inserted into the stator slots (13) of the stator core (10) up and down and are alternately inserted into the adjacent winding layers; the head end and the tail end of the reverse winding segment are positioned outside the stator slot (13); the orthographic projection of the extending track of the reverse winding segment on the end face of the stator core (10) is in a spiral shape extending from the first winding layer (11) to the second winding layer (12); the head end of the forward winding segment and the tail end of the reverse winding segment are positioned on the same axial side of the stator core (10) and on the same winding layer;

the special-shaped coil (27) is U-shaped, and the special-shaped coil (27) comprises a left insertion section (271), a left torsion end (273), a right insertion section (272) and a right torsion end (274); the left insertion section (271) and the right insertion section (272) are inserted into the first winding layer (11) or the second winding layer (12), and the left torsion end (273) and the right torsion end (274) are located outside the stator slot (13); the left torsion end (273) is connected with the left insertion section (271) and obliquely extends along the circumferential direction of the stator core (10), the right torsion end (274) is connected with the right insertion section (272) and obliquely extends along the circumferential direction of the stator core (10), and the oblique direction of the right torsion end (274) is the same as that of the left torsion end (273); one of the left twisted end (273) and the right twisted end (274) connects the trailing end of the forward winding segment, and the other of the left twisted end (273) and the right twisted end (274) connects the leading end of the reverse winding segment.

2. The motor flat wire stator according to claim 1, characterized in that the distance between the left insertion section (271) and the right insertion section (272) is D1, the distance corresponding to D1 is N-1 slot pitch or N +1 slot pitch, N is the pole pitch of the motor, and the motor is provided with the motor flat wire stator.

3. The motor flat wire stator according to claim 1, wherein the stator core (10) is provided with a plurality of stator slot groups, each of the stator slot groups being formed by a plurality of stator slots (13) arranged in sequence in a radial direction of the stator core (10), all of the stator slot groups including a plurality of first stator slot groups (60), a plurality of second stator slot groups (70), and a plurality of third stator slot groups (80); the plurality of first stator slot groups (60) are arranged along the circumferential direction of the stator core (10); the plurality of second stator slot groups (70) are arranged along the circumferential direction of the stator core (10); the plurality of third stator slot groups (80) are arranged along the circumferential direction of the stator core (10);

the number of the coil groups is multiple; the coil sets comprise a first coil set forming a U-phase coil of the motor flat wire stator, a second coil set forming a V-phase coil of the motor flat wire stator and a third coil set forming a W-phase coil of the motor flat wire stator, the first coil set is inserted into the stator slots (13) of the first stator slot sets (60), the second coil set is inserted into the stator slots (13) of the second stator slot sets (70), and the third coil set is inserted into the stator slots (13) of the third stator slot sets (80).

4. The motor flat wire stator according to claim 1, wherein the forward winding section comprises a plurality of first U-shaped coils (21), the plurality of first U-shaped coils (21) are sequentially arranged and connected in sequence along the circumferential direction of the stator core (10), each first U-shaped coil (21) comprises a left slot section (211) and a right slot section (212) for inserting the stator slot (13), and the left slot section (211) and the right slot section (212) are respectively inserted into the adjacent winding layers.

5. The motor flat wire stator according to claim 4, characterized in that the distance between the left slot section (211) and the right slot section (212) is D, D comprising D2 and D3, D2 corresponding to a distance of N-1 slot pitches and D3 corresponding to a distance of N +1 slot pitches, where N is the pole pitch of the motor provided with the motor flat wire stator.

6. The motor flat wire stator according to claim 4, characterized in that the upper end of the left slot section (211) extends away from the right slot section (212), and the upper end of the right slot section (212) extends away from the left slot section (211); the first U-shaped coil (21) further comprises a left outer end (213) and a right outer end (214) located outside the stator slot (13); the left outer end (213) is connected with the upper end of the left socket section (211); the right outer end (214) is connected with the upper end of the right socket section (212); the connection between two adjacent first U-shaped coils (21) is realized by welding the left outer end (213) and the right outer end (214).

7. The motor flat wire stator according to claim 4, wherein the reverse winding section includes a plurality of second U-shaped coils (22), the plurality of second U-shaped coils (22) are sequentially arranged and sequentially connected in the circumferential direction of the stator core (10), and the second U-shaped coils (22) have the same structure as the first U-shaped coils (21).

8. An electrical machine comprising a flat wire stator of an electrical machine according to any of claims 1-7.

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