Flat wire motor stator and motor

Abstract

The utility model provides a flat wire motor stator and a motor. According to the flat wire motor stator, each branch phase leading-out terminal and each branch phase leading-out terminal are respectively provided with an I-shaped conductor used for leading out wires, and each winding groove is provided with a first side edge layer and a second side edge layer. The phase leading-out end and the phase leading-out end of each branch are arranged on the first side edge layer, each phase of flat wire winding comprises a first branch and a second branch which are connected in parallel, the flat wire winding is continuously wound from the first side edge layer to the second side edge layer along the circumferential direction of the stator core, the first branch forms a first winding section, and the second branch forms a second winding section; seen from the same winding direction, the winding mode of the first winding section is the same as the winding mode of the fourth winding section, the winding mode of the third winding section is the same as the winding mode of the second winding section, the flat wire motor stator wire outlet structure is concentrated, wire outlet is simplified, and the rotor installation freedom degree is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flat wire winding motors, and in particular to a flat wire motor stator and a motor. Background Art

[0002] In flat-wire stator windings where the pole number P is an even multiple of 3, the stator flat-wire winding is typically open 180 degrees around the circumference, with two separate branches. This complex output structure requires a busbar that wraps around half a circle or even more before being brought together for output, resulting in complex manufacturing and high costs. Some current output structures also occupy some of the stator core's inner diameter, significantly limiting rotor installation.

[0003] Therefore, a new flat wire motor stator and motor are needed. Utility Model Content

[0004] In a first aspect, the present application provides a flat wire motor stator, comprising a stator core and a stator flat wire winding. The stator core is annular and has a plurality of winding slots formed on its inner wall along its circumference. The total number of winding slots, Q, is a natural number and an even multiple of 3. The number of winding slot layers is 2N, where N ≥ 2.

[0005] The stator flat wire winding is embedded in multiple winding slots and has a three-phase flat wire winding. The number of poles P of the stator flat wire winding is an even multiple of 3, the number of slots per pole per phase q is 3, and each phase flat wire winding has L parallel branches, where L is greater than or equal to 2. Each branch phase outlet and phase lead end are respectively provided with an I-shaped conductor for outlet. The phase outlet and phase lead end of each branch are connected and wound by multiple U-shaped conductors. Each I-shaped conductor is inserted into a corresponding winding slot, and each U-shaped conductor is inserted into two corresponding winding slots. The U-shaped conductor has an insertion end and a welding end. The flat wire motor stator outlets the wire from the insertion end.

[0006] The winding slot has a first side layer and a second side layer, the first side layer is one of the first layer closest to the inner circumference of the stator core and the 2Nth layer closest to the outer circumference of the stator core, and the second side layer is the other of the first layer closest to the inner circumference of the stator core and the 2Nth layer closest to the outer circumference of the stator core.

[0007] The output structure of each phase flat wire winding is as follows: the phase output terminal and phase lead terminal of each branch are arranged in the first side layer, and a plurality of winding slots corresponding to the phase output terminal of each branch are arranged in series to form a phase output slot row, and a plurality of winding slots corresponding to the phase lead terminal of each branch are arranged in series to form a phase lead slot row;

[0008] Each phase flat wire winding includes two parallel first and second branches, which are continuously wound from the first side layer along the circumference of the stator core to the second side layer. The first branch forms a first winding section, and the second branch forms a second winding section.

[0009] At the second side layer, the first branch forms a first transition section, and the second branch forms a second transition section;

[0010] The winding is continuously performed from the second side layer to the first side layer along the circumference of the stator core.

[0011] The first branch forms the third winding section, and the second branch forms the fourth winding section;

[0012] Viewed from the same winding direction, the winding method of the first winding segment is the same as that of the fourth winding segment, the winding method of the third winding segment is the same as that of the second winding segment, the winding directions include a first direction from the phase outlet end to the phase lead end and a second direction from the phase lead end to the phase outlet end, and the winding method includes a U-shaped conductor arrangement and connection rule with different pitches.

[0013] In some optional embodiments of the first aspect of the present application, the U-shaped conductor is formed with two vertical flat linear in-slot conductor portions between the insertion end and the welding end, and the welding end of the U-shaped conductor is formed with two twisted legs outside the winding slot and corresponding to the two in-slot conductor portions respectively.

[0014] The I-shaped conductor is vertically formed with an extended end and a connecting end, an in-slot conductor portion is formed between the extended end and the connecting end, the extended end is formed with an outlet portion for connecting a copper discharge wire, the connecting end is formed with a twisted leg, the connecting end and the welding end are welded together by the twisted leg of the I-shaped conductor and the twisted leg of the U-shaped conductor, and the extended end and the inserted end are on the same side in the axial direction of the stator core.

[0015] In some optional embodiments of the first aspect of the present application, the wire outlet portion is in the shape of a vertical rod and extends vertically along the axial direction of the stator core.

[0016] In some optional embodiments of the first aspect of the present application, the winding slot has N layer groups, each layer group has two adjacent odd-numbered layers and an even-numbered layer,

[0017] The winding methods of the first winding section include:

[0018] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer wiring.

[0019] In some optional embodiments of the first aspect of the present application, the first transition section uses a U-shaped conductor with a pitch of 8 to perform same-layer wiring in the second side layer.

[0020] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding has a full-pitch structure or a cross-short structure,

[0021] U-shaped conductors with a pitch of a are used for cross-layer insertion in all layer groups, and U-shaped conductors with a pitch of a are also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0022] In some optional embodiments of the first aspect of the present application, a is selected from 8, 9 or 10.

[0023] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, and the stator flat wire winding has a first separated short-pitch structure.

[0024] In the first separated short-pitch structure, N is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core. Each rectangular winding slot module occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core. The two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core.

[0025] In each rectangular winding slot module: U-shaped conductors with a pitch of a are used in all layer groups for cross-layer insertion;

[0026] The stator core is radially arranged across two rectangular winding slot modules using U-shaped conductors with a pitch of a±1 for cross-layer insertion.

[0027] Between every two adjacent layer groups, a U-shaped conductor with a pitch of a is used to insert wires across the layers to achieve winding transition between the layer groups.

[0028] In some optional embodiments of the first aspect of the present application, a is 9.

[0029] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding has a second separated short-pitch structure, N in the second separated short-pitch structure is an even number greater than 2, and the phase unit of each phase flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core, each rectangular winding slot module occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core, and the two rectangular winding slot modules are staggered by one winding slot in the circumferential direction of the stator core.

[0030] In each rectangular winding slot module: U-shaped conductors with a pitch of a are used for cross-layer insertion in all layer groups, and U-shaped conductors with a pitch of a are also used between two adjacent layer groups to perform cross-layer insertion for winding transition between layer groups;

[0031] Between two layer groups belonging to different rectangular winding slot modules, a U-shaped conductor with a pitch of a' is used to perform cross-layer insertion to achieve winding transition between layer groups;

[0032] In some optional embodiments of the first aspect of the present application, a' is selected from 8 or 10.

[0033] In some optional embodiments of the first aspect of the present application, a is 9.

[0034] In some optional embodiments of the first aspect of the present application, the winding slot has N layer groups, each layer group has two adjacent odd-numbered layers and an even-numbered layer,

[0035] The winding methods of the second winding section include:

[0036] In each layer group, two U-shaped conductors with a pitch difference of 4 are used to alternately cross the layers along the circumference of the stator core.

[0037] In some optional embodiments of the first aspect of the present application, the second transition section uses a U-shaped conductor with a pitch of 10 to perform same-layer wiring in the second side layer.

[0038] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, and the stator flat wire winding has a full-pitch structure or a cross-short structure;

[0039] In all layer groups, U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across the layers along the circumference of the stator core. U-shaped conductors with a pitch of c are also used between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4.

[0040] In some optional embodiments of the first aspect of the present application, b is 7 and c is 11.

[0041] In some optional embodiments of the first aspect of the present application, b is 8 and c is 12.

[0042] In some optional embodiments of the first aspect of the present application, b is 6 and c is 10.

[0043] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding has a first separated short-pitch structure, N in the first separated short-pitch structure is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core, each rectangular winding slot module occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core, and the two rectangular winding slot modules are staggered by one winding slot in the circumferential direction of the stator core;

[0044] In each rectangular winding slot module: U-shaped conductors with a pitch of b and a pitch of c are used in all layer groups to alternately insert wires across the layers along the circumference of the stator core. U-shaped conductors with a pitch of c are also used between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4;

[0045] The layer group spanning two rectangular winding slot modules adopts U-shaped conductors with a pitch of b' and U-shaped conductors with a pitch of c' to alternately cross the layers along the circumference of the stator core, and c'-b' is equal to 4.

[0046] In some optional embodiments of the first aspect of the present application, c'=c+1, b'=b+1.

[0047] In some optional embodiments of the first aspect of the present application, c'=c-1, b'=b-1.

[0048] In some optional embodiments of the first aspect of the present application, b is 7 and c is 11.

[0049] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding has a second separated short-pitch structure, in which N is an even number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core, each rectangular winding slot module occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core, and the two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core;

[0050] In each rectangular winding slot module: U-shaped conductors with a pitch of b and a pitch of c are used in all layer groups to alternately insert wires across the layers along the circumference of the stator core. U-shaped conductors with a pitch of c are also used between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4;

[0051] Two layer groups belonging to different rectangular winding slot modules use U-shaped conductors with a pitch of c" to perform cross-layer insertion to perform winding transition between layer groups, c" = c ± 1.

[0052] In some optional embodiments of the first aspect of the present application, b is 7, c is 11, and c″ is 10 or 12.

[0053] In some optional embodiments of the first aspect of the present application, the copper busbar includes an outgoing copper busbar and a star point copper busbar, the outgoing portion extends out of the plug-in end of the U-shaped conductor, and the copper busbar is arranged on the side of the outgoing portion facing the outer periphery of the stator core.

[0054] In some optional embodiments of the first aspect of the present application, all phase outgoing wire ends of each phase flat wire winding are connected to the same outgoing wire copper bar, and the three-phase flat wire windings correspond to three outgoing wire copper bars respectively;

[0055] All phase lead ends of the three-phase flat wire winding are connected to the same star point copper bar;

[0056] The three-phase flat wire winding is connected in star or delta.

[0057] A second aspect of the present application provides a motor having the flat wire motor stator of the first aspect of the present application.

[0058] The first aspect of the present application provides a flat wire motor stator, which is wound by providing U-shaped and I-shaped conductors of different shapes, with each branch exiting at the insertion end through the I-shaped conductor. The winding method of the two parallel first and second branches in each phase flat wire winding allows the output structure of the three-phase flat wire winding to be concentrated in the circumferential direction of the stator, simplifying the output structure, reducing the manufacturing process and cost, avoiding occupying the inner diameter space on one side of the stator, and providing greater freedom of installation of the motor rotor, avoiding the limitations of the output structure on the rotor, and making the overall machine design more flexible.

[0059] In the second aspect of the present application, the motor has a simpler design and lower manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0061] Figure 1 This is a schematic diagram of the three-dimensional structure of the flat wire motor stator in one embodiment of the present application;

[0062] Figure 2 This is a schematic diagram of the three-dimensional structure of the stator flat wire winding according to an embodiment of the present application;

[0063] Figure 3 Schematic diagram of the three-dimensional structure of the U-phase flat wire winding in the stator flat wire winding according to an embodiment of the present application;

[0064] Figure 4 This is a diagram showing the arrangement relationship between the phase outgoing line trough row and the phase lead-in line trough row in the first layer according to an embodiment of the present application;

[0065] Figure 5 This is a schematic structural diagram of a first U-shaped conductor according to an embodiment of the present application;

[0066] Figure 6 This is a schematic structural diagram of a second U-shaped conductor according to an embodiment of the present application;

[0067] Figure 7 This is a schematic structural diagram of a third U-shaped conductor according to an embodiment of the present application;

[0068] Figure 8 This is a schematic structural diagram of a fourth U-shaped conductor according to an embodiment of the present application;

[0069] Figure 9This is a schematic structural diagram of a fifth U-shaped conductor according to an embodiment of the present application;

[0070] Figure 10 This is a schematic structural diagram of a sixth U-shaped conductor according to an embodiment of the present application;

[0071] Figure 11 This is a schematic structural diagram of a seventh U-shaped conductor according to an embodiment of the present application;

[0072] Figure 12 This is a schematic structural diagram of an I-shaped conductor according to an embodiment of the present application;

[0073] Figure 13 This is a schematic diagram of the wiring method of the first branch U1 of the U phase at the non-outgoing line end when viewed from the non-outgoing line end along the axial direction of the stator core in Example 1 of the present application;

[0074] Figure 14 This is a schematic diagram of the wiring method of the second branch U2 of the U phase at the non-outgoing line end when viewed from the non-outgoing line end along the axial direction of the stator core in Example 1 of the present application;

[0075] Figure 15 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 1 of the present application;

[0076] Figure 16 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 2 of the present application;

[0077] Figure 17 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 3 of the present application;

[0078] Figure 18 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 4 of the present application;

[0079] Figure 19 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 5 of the present application;

[0080] Figure 20 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 6 of the present application;

[0081] Figure 21This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end, viewed from the non-output end along the axial direction of the stator core in Example 7 of the present application;

[0082] Figure 22 This application Figures 13 to 21 The different colored lines represent the pitch of the U-shaped conductor used.

[0083] Description of reference numerals:

[0084] Flat wire motor stator-1; stator core-11; winding slot-111; stator flat wire winding-12;

[0085] U-shaped conductor 2; welding end 21; plug-in end 22; inverted V-shaped connection portion 221; first folded section 222; second folded section 223; bending structure 224; twisted leg 23; first twisted leg 231; second twisted leg 232; in-slot conductor portion 24; first in-slot conductor portion 241; second in-slot conductor portion 242;

[0086] Total outgoing line structure-3;

[0087] Phase outgoing line duct row-41; Phase lead-in line duct row-42;

[0088] Phase outgoing line terminal-51; Phase lead terminal-52;

[0089] Outgoing copper busbar-6; Star point copper busbar-7;

[0090] First U-shaped conductor 100; second U-shaped conductor 200; third U-shaped conductor 300; fourth U-shaped conductor 400; fifth U-shaped conductor 500; sixth U-shaped conductor 600; seventh U-shaped conductor 700;

[0091] I-shaped conductor 800; protruding end 801; connecting end 802; outlet portion 803; third folded section 804. DETAILED DESCRIPTION

[0092] The following will be combined with the Figure 1 To the attached Figure 22 The technical solution of this application is described in detail.

[0093] like Figure 1 As shown, the present application provides a flat wire motor stator 1, comprising a stator core 11 and a stator flat wire winding 12. The stator core 11 is annular and has a plurality of winding slots 111 formed on its inner wall along its circumference. The total number Q of the winding slots 111 is a natural number and an even multiple of 3. The number of layers of the winding slots 111 is 2N, where N ≥ 2.

[0094] The stator flat wire winding 12 is embedded in a plurality of winding slots 111 and comprises a three-phase flat wire winding. The number of poles P of the stator flat wire winding 12 is an even multiple of 3, the number of slots per pole per phase q is 3, and each phase flat wire winding has L parallel branches, where L is greater than or equal to 2. Each branch phase outlet terminal 51 and phase lead terminal 52 are each provided with an I-shaped conductor for outlet. The phase outlet terminal 51 and phase lead terminal 52 of each branch are connected and wound by a plurality of U-shaped conductors. Each I-shaped conductor is inserted into a corresponding winding slot 111, and each U-shaped conductor is inserted into two corresponding winding slots 111. The U-shaped conductor has an insertion end and a welding end 21. The flat wire motor stator 1 is wired out from the insertion end.

[0095] The winding slot 111 has a first side layer and a second side layer, the first side layer is one of the first layer closest to the inner circumference of the stator core 11 and the 2Nth layer closest to the outer circumference of the stator core 11, and the second side layer is the other of the first layer closest to the inner circumference of the stator core 11 and the 2Nth layer closest to the outer circumference of the stator core 11.

[0096] The output structure of each phase flat wire winding is as follows: the phase output terminal 51 and the phase lead terminal 52 of each branch are arranged in the first side layer, and the multiple winding slots 111 corresponding to the phase output terminal 51 of each branch are arranged in series to form a phase output slot row 41, and the multiple winding slots 111 corresponding to the phase lead terminal 52 of each branch are arranged in series to form a phase lead slot row 42;

[0097] Each phase flat wire winding includes two parallel first and second branches, which are continuously wound from the first side layer along the circumference of the stator core 11 to the second side layer. The first branch forms a first winding section, and the second branch forms a second winding section.

[0098] At the second side layer, the first branch forms a first transition section, and the second branch forms a second transition section;

[0099] The winding is continuously performed from the second side layer to the first side layer along the circumference of the stator core 11.

[0100] The first branch forms the third winding section, and the second branch forms the fourth winding section;

[0101] Viewed from the same winding direction, the winding method of the first winding segment is the same as that of the fourth winding segment, and the winding method of the third winding segment is the same as that of the second winding segment. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51. The winding method includes a U-shaped conductor arrangement and connection rule with different pitches.

[0102] The first aspect of the present application provides a flat wire motor stator 1, in which the outgoing wire structure of each phase flat wire winding is arranged near the outer periphery of the stator core 11, and the outgoing wire structure of the three-phase flat wire winding is concentrated in the circumferential direction of the stator, which simplifies the outgoing wire structure, reduces the manufacturing process and cost, avoids occupying the inner diameter space on one side of the stator, and makes the installation freedom of the motor rotor higher, avoids the limitation of the outgoing wire structure on the rotor, and makes the overall machine design more flexible.

[0103] In the embodiment of the present application, the stator core 11 is annular, and the inner wall of the stator core 11 is provided with a plurality of winding slots 111 along its circumference. The plurality of winding slots 111 are evenly arranged along the circumference of the stator core 11. In some embodiments, the total number of winding slots 111 is 54.

[0104] In some optional embodiments of the present application, the output wire structure of each phase flat wire winding is as follows: the phase output wire end 51 and the phase lead wire end 52 of each branch are arranged in the first layer closest to the inner circumference of the stator core 11. That is, in these embodiments, the first side layer is the first layer, and the second side layer is the 2Nth layer. A plurality of winding slots 111 corresponding to the phase output wire end 51 of each branch are connected and arranged to form a phase output wire slot row 41, and a plurality of winding slots 111 corresponding to the phase lead wire end 52 of each branch are connected and arranged to form a phase lead wire slot row 42. The phase output wire slot row 41 and the phase lead wire slot row 42 of the same phase flat wire winding are spaced apart by X winding slots 111.

[0105] In the circumferential direction of the stator core 11, the three outgoing wire structures corresponding to the three-phase flat wire windings are interlaced with each other to form a total outgoing wire structure 3, X is greater than or equal to 2L, and the total number A of the winding slots 111 corresponding to the total outgoing wire structure 3 satisfies 6L≤A≤Q / 2, where A is a natural number.

[0106] In the embodiment of the present application, the number of layers from the inside to the outside in the radial direction of the stator core 11 is sorted in ascending order.

[0107] In the embodiment of the present application, X is greater than or equal to 2L, so that the phase outgoing line slot row 41 and / or the phase lead line slot row 42 of the same phase flat wire winding are inserted into the interval between the phase outgoing line slot row 41 and the phase lead line slot row 42 of the same phase flat wire winding, so that the overall structure 3 has a compact layout and is more conducive to centralized line output.

[0108] Figure 2 This is a schematic three-dimensional structural diagram of the flat wire stator flat wire winding 12 structure of Example 1 of the present application.

[0109] Figure 3 Schematic diagram of the three-dimensional structure of the U-phase flat wire winding in the flat wire stator flat wire winding 12 structure of Example 1 of the present application.

[0110] like Figure 2 and Figure 3As shown, the three-phase flat wire winding includes a U-phase flat wire winding, a W-phase flat wire winding, and a V-phase flat wire winding. Each phase winding consists of at least two parallel branches, each of which is formed by connecting and winding multiple U-shaped conductors inserted into winding slots 111. The U-shaped conductors are inserted from the first axial end of the stator core 11, with the plug-in end 22 of the U-shaped conductor corresponding to the first end. The welded end 21 of the U-shaped conductor extends out of the stator core 11 from the second axial end of the stator, with the welded end 21 corresponding to the second end. After the multiple U-shaped conductors are slotted, the twisted legs of the welded ends 21 of the different U-shaped conductors are welded together during the welding process. Each branch phase outlet end 51 and phase lead end 52 are each provided with an I-shaped conductor for outlet. The twisted legs of the I-shaped conductor are also welded to the twisted legs of the U-shaped conductor to form a winding branch.

[0111] For ease of understanding, the technical terms appearing in the embodiments of this application are explained accordingly:

[0112] Stator: refers to the stationary part of the motor, whose function is to generate a rotating magnetic field.

[0113] Rotor: refers to the rotating part in the motor, which is used to realize the conversion of electrical energy into mechanical energy.

[0114] U-shaped conductor: The U-shaped conductor is one of the smallest structural units of a single-phase flat wire winding. The U-shaped conductor is a hairpin coil formed by a twisting process and has a welding end 21 and a wire insertion end 22 in the vertical direction.

[0115] A vertical flat linear in-slot conductor portion 24 is formed between the welding end 21 and the wire insertion end 22 . The in-slot conductor portion 24 includes a first in-slot conductor portion 24124 and a second in-slot conductor portion 24224 that are spaced apart. Both the first in-slot conductor portion 24124 and the second in-slot conductor portion 24224 are flat linear conductors.

[0116] The twisting leg includes a first twisting leg 231 and a second twisting leg 232 that are separately arranged. The first twisting leg 231 is connected to the first in-slot conductor portion 24124 , and the second twisting leg 232 is connected to the second in-slot conductor portion 24224 .

[0117] In some examples, the first twisted leg 231 and the second twisted leg 232 of the U-shaped conductor have opposite twisting directions, and the first twisted leg 231 and the second twisted leg 232 are staggered in the winding slot 111. Staggered arrangement means that the first in-slot conductor portion 24124 corresponding to the first twisted leg 231 and the second in-slot conductor portion 24224 corresponding to the second twisted leg 232 are not on the same layer of the winding slot 111. Opposite twisting directions can be understood as the first twisted leg 231 and the second twisted leg 232 being arranged in a quasi-figure-eight configuration.

[0118] In other examples, the first twisted leg 231 and the second twisted leg 232 of the U-shaped conductor have the same twisting direction, and the first twisted leg 231 and the second twisted leg 232 are arranged in the same layer. Here, the staggered and same-layer arrangement of the twisted legs is based on the actual position of the in-slot conductor portion 24 connected to the twisted legs in the winding slot 111, and does not mean that the twisted legs are arranged in the winding slot 111. The same twisting direction can be understood as the first twisted leg 231 and the second twisted leg 232 are bent in the same direction.

[0119] The plug-in terminal 22 is formed with an inverted V-shaped connection portion 221. The V-shaped connection portion includes a first folded segment 222 connected to the first slot conductor portion 24124 and a second folded segment 223 connected to the second slot conductor portion 24224. The connection between the first folded segment 222 and the second folded segment 223 forms a bent structure 224. The bent structure 224 has two different staggered layer directions. The first staggered layer direction is that the first folded segment 222 is closer to the centerline of the customized iron core than the second folded segment 223 at the connection point. The second staggered layer direction is that the second folded segment 223 is closer to the centerline of the customized iron core than the first folded segment 222 at the connection point. The staggered directions of the U-shaped conductors are different, so that the first slot conductor portion 24124 and the second slot conductor portion 24224 have different positional settings in the radial direction of the stator core 11. For example, one staggered direction makes the first slot conductor portion 24124 closer to the axis of the stator core 11 than the second slot conductor portion 24224, and another staggered direction makes the second slot conductor portion 24224 closer to the axis of the stator core 11 than the first slot conductor portion 24124.

[0120] I-shaped conductors: Similar in shape to the vertical half of a U-shaped conductor, they have an extended end 801 and a connection end 802. The vertical direction corresponds to the extension direction of the in-slot conductor portion 24. Two I-shaped conductors are provided for each branch of each phase flat wire winding: one I-shaped conductor forms the corresponding phase outlet terminal 51, and the other I-shaped conductor forms the corresponding phase lead terminal 52.

[0121] Pitch: Also known as span, it refers to the distance between two slots. It also refers to the distance between two edges of the same element in a motor's flat wire winding on the armature surface. It is usually expressed by the number of winding slots 111 in the stator core 11. For example, if the first slot of a U-shaped conductor (conductor portion 24124) is in slot 01 and the second slot (conductor portion 24224) is in slot 10, the pitch is 9.

[0122] Generally, the full pitch is the number of slots / the number of poles, for example, the number of slots is 54 / the number of poles is 6=9. A pitch greater than the full pitch is a long pitch, and a pitch less than the full pitch is a short pitch.

[0123] The concept of the number of layers: Each area in the winding slot 111 corresponding to the insertion of a flat wire conductor is called a layer. The areas in the winding slot 111 radially away from the center of the stator core 11 are named the 1st layer, the 2nd layer... the 2N-1 layer and the 2N layer in sequence, where N is greater than or equal to 2.

[0124] The number of poles P is an even multiple of 3, that is, P = 6, 12, 18... and other integers.

[0125] like Figure 4 As shown, in some optional embodiments of one aspect of the present application, phase outgoing line slot rows 41 and phase lead line slot rows 42 are alternately arranged in the circumferential direction of the stator core 11 in the main outgoing line structure 3. Two branches are provided in each phase flat wire winding. The phase outgoing line slot row 41 includes two winding slots 111 in the first layer, and the phase lead line slot row 42 includes two winding slots 111 in the first layer.

[0126] In some optional embodiments of the first aspect of the present application, at least one winding slot 111 is spaced between two adjacent phase outgoing slot rows 41 and phase lead slot rows 42 in the main outgoing line structure 3 .

[0127] In some optional embodiments of the first aspect of the present application, in the circumferential direction of the stator core 11 , all phase outgoing line slot rows 41 and phase lead-in line slot rows 42 in the main outgoing line structure 3 are evenly spaced.

[0128] In some optional embodiments of the first aspect of the present application, each phase flat wire winding has two parallel branches, and X is 7.

[0129] In some optional embodiments of the first aspect of the present application, the U-shaped conductor is formed with two vertical flat linear in-slot conductor portions 24 between the insertion end and the welding end 21, and the U-shaped conductor welding end 21 is formed with two twisted legs outside the winding slot 111 and corresponding to the two in-slot conductor portions 24 respectively.

[0130] The I-shaped conductor is vertically formed with an extended end 801 and a connecting end 802, and an in-slot conductor portion 24 is formed between the extended end 801 and the connecting end 802. The extended end 801 is formed with an outlet portion 803 for connecting a copper discharge line, and the connecting end 802 is formed with a twisted leg. The connecting end 802 and the welding end 21 are welded together by the twisted leg of the I-shaped conductor and the twisted leg of the U-shaped conductor. The extended end 801 and the inserted end are on the same side of the stator core 11 in the axial direction.

[0131] In some optional embodiments of the first aspect of the present application, the outgoing wire portion 803 is in the shape of a vertical rod and extends vertically along the axial direction of the stator core 11 .

[0132] In some optional embodiments of the first aspect of the present application, each phase flat wire winding has two parallel first branches and a second branch.

[0133] The stator core 11 is continuously wound from the first layer to the 2Nth layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0134] At the 2Nth layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0135] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2Nth layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0136] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0137] In some optional embodiments of the present application, the winding method includes a U-shaped conductor arrangement connection rule with different pitches.

[0138] In some optional embodiments of the first aspect of the present application, the winding method includes a U-shaped conductor arrangement connection rule with different pitches.

[0139] In some optional embodiments of the first aspect of the present application, the winding slot 111 has N layer groups, each layer group has two adjacent odd layers and an even layer.

[0140] The winding methods of the first winding section include:

[0141] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer wiring.

[0142] In some optional embodiments of the first aspect of the present application, the first transition section uses a U-shaped conductor with a pitch of 8 to perform same-layer wiring in the 2N layer.

[0143] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, and the stator flat wire winding 12 has a full-pitch structure or a cross-short structure.

[0144] U-shaped conductors with a pitch of a are used for cross-layer insertion in all layer groups, and U-shaped conductors with a pitch of a are also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0145] In some optional embodiments of the first aspect of the present application, a is selected from 8, 9 or 10.

[0146] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, and the stator flat wire winding 12 has a first separated short-pitch structure.

[0147] In the first separated short-pitch structure, N is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11. Each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11. The two rectangular winding slot 111 modules are offset by one winding slot 111 in the circumferential direction of the stator core 11.

[0148] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of a are used in all layer groups for cross-layer insertion;

[0149] The stator core 11 is radially arranged across two rectangular winding slots 111 modules, and a U-shaped conductor with a pitch of a±1 is used for cross-layer insertion.

[0150] Between every two adjacent layer groups, a U-shaped conductor with a pitch of a is used to insert wires across the layers to achieve winding transition between the layer groups.

[0151] In some optional embodiments of the first aspect of the present application, a is 9.

[0152] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding 12 has a second separated short-pitch structure, N in the second separated short-pitch structure is an even number greater than 2, and the phase unit of each phase flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11, each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11, and the two rectangular winding slot 111 modules are staggered by one winding slot 111 in the circumferential direction of the stator core 11.

[0153] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of a are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of a are also used between two adjacent layer groups to perform inter-layer winding transition;

[0154] Between two layer groups belonging to different rectangular winding slot 111 modules, a U-shaped conductor with a pitch of a' is used to perform cross-layer insertion to achieve winding transition between the layer groups;

[0155] In some optional embodiments of the first aspect of the present application, a' is selected from 8 or 10.

[0156] In some optional embodiments of the first aspect of the present application, a is 9.

[0157] In some optional embodiments of the first aspect of the present application, the winding slot 111 has N layer groups, each layer group has two adjacent odd layers and an even layer.

[0158] The winding methods of the second winding section include:

[0159] In each layer group, two U-shaped conductors with a pitch difference of 4 are used to alternately cross the layers along the circumferential direction of the stator core 11.

[0160] In some optional embodiments of the first aspect of the present application, the second transition section uses a U-shaped conductor with a pitch of 10 to perform same-layer wiring in the 2N layer.

[0161] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, and the stator flat wire winding 12 has a full-pitch structure or a cross-short structure;

[0162] In all layer groups, U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of c are also inserted across the layers between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4.

[0163] In some optional embodiments of the first aspect of the present application, b is 7 and c is 11.

[0164] In some optional embodiments of the first aspect of the present application, b is 8 and c is 12.

[0165] In some optional embodiments of the first aspect of the present application, b is 6 and c is 10.

[0166] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding 12 has a first separated short-pitch structure, N in the first separated short-pitch structure is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11, each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11, and the two rectangular winding slot 111 modules are offset by one winding slot 111 in the circumferential direction of the stator core 11;

[0167] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across layers along the circumference of the stator core 11 in all layer groups. U-shaped conductors with a pitch of c are also inserted across layers between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4;

[0168] The layer group spanning two rectangular winding slot 111 modules uses U-shaped conductors with a pitch of b' and U-shaped conductors with a pitch of c' to alternately cross the layers along the circumference of the stator core 11, and c'-b' is equal to 4.

[0169] In some optional embodiments of the first aspect of the present application, c'=c+1, b'=b+1;

[0170] In some optional embodiments of the first aspect of the present application, c'=c-1, b'=b-1;

[0171] In some optional embodiments of the first aspect of the present application, b is 7 and c is 11.

[0172] In some optional embodiments of the first aspect of the present application, N is a natural number greater than 2, the stator flat wire winding 12 has a first separated short-pitch structure, N in the first separated short-pitch structure is an even number greater than 2, and the phase unit of each phase flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11, each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11, and the two rectangular winding slot 111 modules are offset by one winding slot 111 in the circumferential direction of the stator core 11;

[0173] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across layers along the circumference of the stator core 11 in all layer groups. U-shaped conductors with a pitch of c are also inserted across layers between two adjacent layer groups to perform winding transition between the layer groups. cb is equal to 4;

[0174] Two layer groups belonging to different rectangular winding slot 111 modules use U-shaped conductors with a pitch of c" to perform cross-layer insertion to perform winding transition between the layer groups, where c" = c±1.

[0175] In some optional embodiments of the first aspect of the present application, b is 7, c is 11, and c″ is 10 or 12.

[0176] In some optional embodiments of the first aspect of the present application, the copper busbar includes an outgoing copper busbar 6 and a star point copper busbar 7, the outgoing portion 803 extends out of the plug-in end 22 of the U-shaped conductor, and the copper busbar is arranged on the side of the outgoing portion 803 facing the outer periphery of the stator core 11.

[0177] In some optional embodiments of the first aspect of the present application, all phase outgoing wire ends 51 of each phase flat wire winding are connected to the same outgoing wire copper bar 6, and the three-phase flat wire windings correspond to three outgoing wire copper bars 6 respectively;

[0178] All phase lead ends 52 of the three-phase flat wire winding are connected to the same star point copper bus 7;

[0179] The three-phase flat wire winding is connected in star or delta.

[0180] A second aspect of the present application provides a motor having the flat wire motor stator 1 of the first aspect of the present application.

[0181] A second aspect of the present application provides a motor having the flat wire motor stator 1 of the first aspect of the present application.

[0182] The present application is further described in detail below through different specific implementations.

[0183] [Example 1]

[0184] In Example 1, the number of flat wire conductor layers is 6 (i.e., the number of winding slots 111 is 6). The number of slots per phase per stage q = total number of slots / number of poles / number of phases. Example 1 of the present application corresponds to a 54-slot, 6-pole three-phase motor. The number of slots per pole per phase q = 54 / 6 / 3 = 3, and each flat wire winding has two parallel branches. The number of poles P is an even multiple of 3, i.e., P = 6. The number of winding slots 111 is 54.

[0185] In Example 1, the connection sequence of a single-phase flat wire winding (U-phase flat wire winding) is taken as an example to illustrate the connection sequence diagram of the flat wire winding under one phase. The single-phase flat wire winding includes multiple U-shaped conductors, and the multiple U-shaped conductors specifically include:

[0186] like Figure 5 As shown, the first U-shaped conductor 100 has a pitch of 11 at the plug-in end 22, and the twisting directions of the first twisted leg 231 and the second twisted leg 232 are opposite. The first twisted leg 231 and the second twisted leg 232 are arranged in different layers, and the bending structure 224 has a second staggered direction.

[0187] like Figure 6 As shown, the second U-shaped conductor 200 has a pitch of 9 at the plug-in end 22, and the twisting directions of the first twisted leg 231 and the second twisted leg 232 are opposite. The first twisted leg 231 and the second twisted leg 232 are arranged in different layers, and the bending structure 224 has a second staggered direction.

[0188] like Figure 7 As shown, the third U-shaped conductor 300 has a wire end 22 with a pitch of 7, the first twisted leg 231 and the second twisted leg 232 have opposite twisting directions, the first twisted leg 231 and the second twisted leg 232 are arranged in different layers, and the bending structure 224 has a second staggered direction;

[0189] like Figure 8 As shown, the fourth U-shaped conductor 400 has a pitch of 11 at the plug-in end 22, and the twisting directions of the first twisted leg 231 and the second twisted leg 232 are opposite. The first twisted leg 231 and the second twisted leg 232 are arranged in different layers, and the bending structure 224 has a first staggered direction.

[0190] like Figure 9As shown, the fifth U-shaped conductor 500 has a pitch of 9 at the plug-in end 22, and the twisting directions of the first twisted leg 231 and the second twisted leg 232 are opposite. The first twisted leg 231 and the second twisted leg 232 are arranged in different layers, and the bending structure 224 has a first staggered direction.

[0191] like Figure 10 As shown, the sixth U-shaped conductor 600 has a pitch of 10 at the plug end 22, and the first twisted leg 231 and the second twisted leg 232 have the same twisting direction and are the first twisting direction twisted to the left. The first twisted leg 231 and the second twisted leg 232 are arranged in the same layer, and the bending structure 224 has a first staggered direction.

[0192] like Figure 11 As shown, the seventh U-shaped conductor 700, the wire end 22 has a pitch of 8, the twisting direction of the first twisted leg 231 and the second twisted leg 232 is the same and is the first twisting direction twisting to the left, the first twisted leg 231 and the second twisted leg 232 are arranged in the same layer, and the bending structure 224 has a first staggered direction.

[0193] like Figure 12 As shown, the I-shaped conductor 800 is shaped like the vertical half of the first U-shaped conductor 100, with an extended end 801 and a connecting end 802. The vertical direction corresponds to the extension direction of the in-slot conductor portion 24. The I-shaped conductor 800 is vertically formed with an outlet portion 803, a third folded section 804, the in-slot conductor portion 24, and a twisted leg 2323. The outlet portion 803 and the in-slot conductor portion 24 both extend vertically. The folded section connects the outlet portion 803 and the in-slot conductor portion 24, forming a bend at the connection. The twisted leg 23 is connected to the in-slot conductor portion 24 and is also bent relative to the in-slot conductor portion 24. The outlet portion 803 is located at the extended end 801 of the I-shaped conductor 800 (serving as the phase outlet terminal 51 or phase lead terminal 52), while the twisted leg 23 is located at the connecting end 802 of the I-shaped conductor 800.

[0194] The U-shaped conductor used in the flat wire winding of the embodiment of the present application is selected from the following Figures 5 to 11 The U-shaped conductor shown, the I-shaped conductor is selected from Figure 12 An I-shaped conductor is shown.

[0195] It should be noted that the aforementioned co-layer arrangement of the first twist leg 231 and the second twist leg 232 means that the first in-slot conductor portion 24124 connected to the first twist leg 231 and the second in-slot conductor portion 24224 connected to the second twist leg 232 are located on the same layer after being inserted into the winding slot 111. The first twist leg 231 and the second twist leg 232 are formed outside the winding slot 111 and remain outside the winding slot 111 during welding.

[0196] Figure 13This is a schematic diagram of the wiring method of the first branch U1 of the U phase at the outlet end when viewed from the outlet end along the axial direction of the stator core 11 in Example 1 of the present application. Figure 13 The middle outlet side is the side actually observed by the observer, so it is represented by a solid line; the non-outlet side is the part that is blocked by the observer, and is represented by a dotted line. The outlet side corresponds to the plug-in terminal 22, and the non-outlet side corresponds to the welding terminal 21.

[0197] Figure 14 This is a schematic diagram of the wiring method of the second branch U2 of the U phase at the outlet end when viewed from the outlet end along the axial direction of the stator core 11 and not at the outlet end in Example 1 of the present application. Figure 14 The middle outlet side is the side actually observed by the observer, so it is represented by a solid line; the non-outlet side is the part that is blocked by the observer, and is represented by a dotted line. The outlet side corresponds to the plug-in terminal 22, and the non-outlet side corresponds to the welding terminal 21.

[0198] Figure 15 This is a schematic diagram of the wiring method of the two parallel branches of the U phase at the output end when viewed from the output end along the axial direction of the stator core 11 and not at the output end in Example 1 of the present application. Figure 15 The middle outlet side is the side actually observed by the observer, so it is represented by a solid line; the non-outlet side is the part that is blocked by the observer, and is represented by a dotted line. The outlet side corresponds to the plug-in terminal 22, and the non-outlet side corresponds to the welding terminal 21.

[0199] In the first embodiment, the stator flat wire winding 12 has a full-pitch structure. The arrangement of the phase belts in the first embodiment is as follows:

[0200] In the first embodiment of the present application, three adjacent winding slots 111 constitute a phase unit. In one phase unit, all the conductor portions 24 in the slots are in the same phase.

[0201] In Example 1 of the present application, the flat wire stator flat wire winding 12 has a structure in which the U-phase flat wire winding forms a plurality of first-phase units in the winding slots 111 of the stator core 11, the V-phase flat wire winding forms a plurality of second-phase units in the winding slots 111 of the stator core 11, and the W-phase flat wire winding forms a plurality of third-phase units in the winding slots 111 of the stator core 11. The first-phase units, second-phase units, and third-phase units are arranged in a periodic arrangement around the circumference of the stator core 11, i.e., the U-phase, V-phase, and W-phase units are arranged alternately in phase order.

[0202] In this embodiment, the wires exiting the welded ends 21 are in phase. q = 3, and the stator core 11 has six layers per slot, with two parallel branches per phase. The stator core 11 has an ascending order of layers from the axis outward, with six layers toward the outer periphery and one layer toward the inner periphery.

[0203] like Figure 13As shown, the connection sequence of the first branch of the U-phase flat wire winding is as follows:

[0204] The U1 phase outlet terminal 51 is the outlet portion 803 of the first I-shaped conductor 800. The in-slot conductor portion 24 of the first I-shaped conductor 800 is inserted into the first layer 20 slots.

[0205] The twisted leg of the first I-shaped conductor 800 located in the first layer and the 20th slot is connected to the twisted leg of the second U-shaped conductor 200 located in the second layer and the 29th slot.

[0206] The twisted leg of the second U-shaped conductor 200 located in the first layer, slot 38, is connected to the twisted leg of another second U-shaped conductor 200 located in the second layer, slot 47.

[0207] The twisted leg of the second U-shaped conductor 200 located in the first layer and the second slot is connected to the twisted leg of the fifth U-shaped conductor 500 located in the second layer and the eleventh slot.

[0208] The twisted leg of the fifth U-shaped conductor 500 located in the 3rd layer and the 20th slot is connected to the twisted leg of the second U-shaped conductor 200 located in the 4th layer and the 29th slot.

[0209] The twisted leg of the second U-shaped conductor 200 located in the slot 38 of the third layer is connected to the twisted leg of another second U-shaped conductor 200 located in the slot 47 of the fourth layer.

[0210] The twisted leg of the second U-shaped conductor 200 located at the 3rd layer and the 2nd slot is connected to the twisted leg of another fifth U-shaped conductor 500 located at the 4th layer and the 11th slot.

[0211] The twisted leg of the fifth U-shaped conductor 500 located at the 5th layer and the 20th slot is connected to the twisted leg of the second U-shaped conductor 200 located at the 6th layer and the 29th slot.

[0212] The twisted leg of the second U-shaped conductor 200 located in the 3rd layer, slot 38, is connected to the twisted leg of another second U-shaped conductor 200 located in the 6th layer, slot 47.

[0213] The twisted leg of the second U-shaped conductor 200 located at the 5th layer and the 2nd slot is connected to the twisted leg of another seventh U-shaped conductor 700 located at the 6th layer and the 11th slot.

[0214] The twisted leg of the seventh U-shaped conductor 700 located at the 6th layer and the 19th slot is connected to the twisted leg of another third U-shaped conductor 300 located at the 5th layer and the 10th slot.

[0215] The twisted leg of the third U-shaped conductor 300 located at the 6th layer and the 3rd slot is connected to the twisted leg of the first U-shaped conductor 100 located at the 5th layer and the 48th slot.

[0216] The twisted leg of the first U-shaped conductor 100 located in the 6th layer and the 37th slot is connected to the twisted leg of another third U-shaped conductor 300 located in the 5th layer and the 28th slot.

[0217] The twisted leg of the third U-shaped conductor 300 located at the 6th layer and the 21st slot is connected to the twisted leg of the first U-shaped conductor 100 located at the 5th layer and the 12th slot.

[0218] The twisted leg of the first U-shaped conductor 100 located at the 6th layer and the 1st slot is connected to the twisted leg of another third U-shaped conductor 300 located at the 5th layer and the 46th slot.

[0219] The twisted leg of the third U-shaped conductor 300 located in the 6th layer and the 39th slot is connected to the twisted leg of another fourth U-shaped conductor 400 located in the 5th layer and the 30th slot.

[0220] The twisted leg of the fourth U-shaped conductor 400 located at the 4th layer and the 19th slot is connected to the twisted leg of the third U-shaped conductor 300 located at the 3rd layer and the 10th slot.

[0221] The twisted leg of the third U-shaped conductor 300 located at the 4th layer and the 3rd slot is connected to the twisted leg of the other first U-shaped conductor 100 located at the 3rd layer and the 48th slot.

[0222] The twisted leg of the first U-shaped conductor 100 located in the 4th layer, slot 37, is connected to the twisted leg of the third U-shaped conductor 300 located in the 3rd layer, slot 28.

[0223] The twisted leg of the third U-shaped conductor 300 located in the 4th layer and the 21st slot is connected to the twisted leg 103 of the other first U-shaped conductor 100 located in the 3rd layer and the 12th slot.

[0224] The twisted leg of the first U-shaped conductor 100 located in the 4th layer and the 1st slot is connected to the twisted leg 303 of another third U-shaped conductor 300 located in the 3rd layer and the 46th slot.

[0225] The twisted leg of the third U-shaped conductor 300 located in the 4th layer and the 39th slot is connected to the twisted leg of the fourth U-shaped conductor 400 located in the 30th slot of the 3rd layer.

[0226] The twisted leg of the fourth U-shaped conductor 400 located in the 19th slot of the second layer is connected to the twisted leg of the third U-shaped conductor 300 located in the 10th slot of the first layer.

[0227] The twisted leg of the third U-shaped conductor 300 located in the second layer and the third slot is connected to the twisted leg of the first U-shaped conductor 100 located in the first layer and the fourth slot.

[0228] The twisted leg of the first U-shaped conductor 100 located in the second layer, slot 37, is connected to the twisted leg of another third U-shaped conductor 300 located in the first layer, slot 28.

[0229] The twisted leg of the third U-shaped conductor 300 located in the 21st slot of the 2nd layer is connected to the twisted leg of the other first U-shaped conductor 100 located in the 12th slot of the 1st layer.

[0230] The twisted leg of the first U-shaped conductor 100 located in the second layer and the first slot is connected to the twisted leg of the third U-shaped conductor 300 located in the first layer and the 46th slot.

[0231] The twisted leg of the third U-shaped conductor 300 located in the second layer 39 slots is connected to the twisted leg of the second I-shaped conductor 800 located in the first layer 30 slots. The outlet portion 803 of the second I-shaped conductor 800 is the U1 phase lead terminal 52.

[0232] like Figure 14 As shown,

[0233] The connection sequence of the second branch of the U-phase flat wire winding is as follows:

[0234] The U2 phase outlet terminal 51 is the outlet portion 803 of the third I-shaped conductor 800. The in-slot conductor portion 24 of the third I-shaped conductor 800 is inserted into the first layer 21 slots.

[0235] The twisted leg of the third I-shaped conductor 800 located in the first layer and the 21st slot is connected to the twisted leg of the third U-shaped conductor 300 located in the second layer and the 30th slot.

[0236] The twisted leg of the third U-shaped conductor 300 located in the first layer, slot 37, is connected to the twisted leg of another first U-shaped conductor 100 located in the second layer, slot 46.

[0237] The twisted leg of the first U-shaped conductor 100 located in slot 03 of the first layer is connected to the twisted leg of another third U-shaped conductor 300 located in slot 12 of the second layer.

[0238] The twisted leg of the third U-shaped conductor 300 located in the 19th slot of the first layer is connected to the twisted leg of the other first U-shaped conductor 100 located in the 28th slot of the second layer.

[0239] The twisted leg of the third U-shaped conductor 300 located in the 39th slot of the first layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 48th slot of the second layer.

[0240] The twisted leg of the third U-shaped conductor 300 located in the first slot of the first layer is connected to the twisted leg of another fourth U-shaped conductor 400 located in the tenth slot of the second layer.

[0241] The twisted leg of the fourth U-shaped conductor 400 located in the 21st slot of the 3rd layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 30th slot of the 4th layer.

[0242] The twisted leg of the third U-shaped conductor 300 located in the 37th slot of the 3rd layer is connected to the twisted leg of the first U-shaped conductor 100 located in the 46th slot of the 4th layer.

[0243] The twisted leg of the first U-shaped conductor 100 located in the 03rd slot of the 3rd layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 12th slot of the 4th layer.

[0244] The twisted leg of the third U-shaped conductor 300 located in the 19th slot of the 3rd layer is connected to the twisted leg of the first U-shaped conductor 100 located in the 28th slot of the 4th layer.

[0245] The twisted leg of the first U-shaped conductor 100 located in the 03rd slot of the 3rd layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 12th slot of the 4th layer.

[0246] The twisted leg of the third U-shaped conductor 300 located in the 19th slot of the 3rd layer is connected to the twisted leg of the first U-shaped conductor 100 located in the 28th slot of the 4th layer.

[0247] The twisted leg of the first U-shaped conductor 100 located in the 39th slot of the 3rd layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 48th slot of the 4th layer.

[0248] The twisted leg of the third U-shaped conductor 300 located at the 01st slot of the 3rd layer is connected to the twisted leg of another fourth U-shaped conductor 400 located at the 10th slot of the 4th layer.

[0249] The twisted leg of the fourth U-shaped conductor 400 located at the 21st slot of the 5th layer is connected to the twisted leg of the third U-shaped conductor 300 located at the 30th slot of the 6th layer.

[0250] The twisted leg of the third U-shaped conductor 300 located at the 37th slot of the 5th layer is connected to the twisted leg of the first U-shaped conductor 100 located at the 46th slot of the 6th layer.

[0251] The twisted leg of the first U-shaped conductor 100 located at the 03rd slot of the 5th layer is connected to the twisted leg of another third U-shaped conductor 300 located at the 12th slot of the 6th layer.

[0252] The twisted leg of the third U-shaped conductor 300 located in the 19th slot of the 5th layer is connected to the twisted leg of the first U-shaped conductor 100 located in the 28th slot of the 6th layer.

[0253] The twisted leg of the first U-shaped conductor 100 located in the 39th slot of the 5th layer is connected to the twisted leg of another third U-shaped conductor 300 located in the 48th slot of the 6th layer.

[0254] The twisted leg of the third U-shaped conductor 300 located at the 01st slot of the 5th layer is connected to the twisted leg of another sixth U-shaped conductor 600 located at the 10th slot of the 6th layer.

[0255] The twisted leg of the sixth U-shaped conductor 600 located at the 20th slot of the 6th layer is connected to the twisted leg of the second U-shaped conductor 200 located at the 11th slot of the 5th layer.

[0256] The twisted leg of the second U-shaped conductor 200 located at the 02nd slot of the 6th layer is connected to the twisted leg of another second U-shaped conductor 200 located at the 47th slot of the 5th layer.

[0257] The twisted leg of the second U-shaped conductor 200 located at the 38th slot of the 6th layer is connected to the twisted leg of another fifth U-shaped conductor 500 located at the 29th slot of the 5th layer.

[0258] The twisted leg of the fifth U-shaped conductor 500 located in the 20th slot of the 4th layer is connected to the twisted leg of the second U-shaped conductor 200 located in the 11th slot of the 3rd layer.

[0259] The twisted leg of the second U-shaped conductor 200 located in the 02nd slot of the 4th layer is connected to the twisted leg of another second U-shaped conductor 200 located in the 47th slot of the 3rd layer.

[0260] The twisted leg of the second U-shaped conductor 200 located in the 38th slot of the 4th layer is connected to the twisted leg of another fifth U-shaped conductor 500 located in the 29th slot of the 3rd layer.

[0261] The twisted leg of the fifth U-shaped conductor 500 located in the 20th slot of the 2nd layer is connected to the twisted leg of the second U-shaped conductor 200 located in the 11th slot of the 1st layer.

[0262] The twisted leg of the second U-shaped conductor 200 located in the 02nd slot of the 2nd layer is connected to the twisted leg of another second U-shaped conductor 200 located in the 47th slot of the 1st layer.

[0263] The twisted leg of the second U-shaped conductor 200 located at the 38th slot of the second layer is connected to the twisted leg of the fourth I-shaped conductor 800 located at the 29th slot of the first layer. The outgoing portion 803 of the fourth I-shaped conductor 800 is the U2 phase lead terminal 52.

[0264] In general, in Example 1 of the present application, each phase flat wire winding (Example 1 only takes the U-phase flat wire winding as an example, and the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first branches and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0265] The stator core 11 is continuously wound from the first layer to the 2N(6)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0266] At the 2N(6) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0267] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(6) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0268] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0269] Combine Figures 13 to 15 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0270] In this first embodiment, the winding grooves 111 have six layers, forming three layer groups.

[0271] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N(6) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0272] The winding methods of the first winding section include:

[0273] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 9.

[0274] A U-shaped conductor with a pitch of 9 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0275] The winding methods of the third winding section include:

[0276] In each layer group, U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 11 and 7 is 4.

[0277] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0278] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0279] The winding methods of the second winding section include:

[0280] In each layer group, U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 11 and 7 is 4.

[0281] The winding methods of the fourth winding section include:

[0282] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 9.

[0283] A U-shaped conductor with a pitch of 9 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0284] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0285] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0286] [Example 2]

[0287] like Figure 16 As shown, the difference between Example 2 and Example 1 is the arrangement of the phase belts. Example 2 has a cross-short distance structure, and the output wires of the welding end 21 of Example 2 are cross-phase. The specific arrangement of the phase belts in Example 2 is as follows:

[0288] In Example 2 of the present application, each phase unit spans four winding slots 111 circumferentially around the stator core 11. In the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. In the radial direction of the stator core 11, three consecutive winding slots 111 in two adjacent layers, arranged from the outside to the inside, form a staggered slot unit, resulting in a total of N staggered slot units. In each staggered slot unit, the first winding slot 111 group near the outer circumference of the stator core 11 is offset by one winding slot 111 counterclockwise relative to the second winding slot 111 group farther from the outer circumference. In a phase unit, all slot conductors 24 are in phase.

[0289] In general, in Example 2 of the present application, each phase flat wire winding (Example 2 only takes the U-phase flat wire winding as an example, and the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first branches and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0290] The stator core 11 is continuously wound from the first layer to the 2N(6)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0291] At the 2N(6) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0292] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(6) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0293] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0294] Combine Figure 16 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0295] In this second embodiment, the winding grooves 111 have six layers, forming three layer groups.

[0296] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N(6) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0297] The winding methods of the first winding section include:

[0298] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 10.

[0299] A U-shaped conductor with a pitch of 10 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0300] The winding methods of the third winding section include:

[0301] In each layer group, U-shaped conductors with a pitch of 8 and U-shaped conductors with a pitch of 12 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 12 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 12 and 8 equals 4.

[0302] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0303] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0304] The winding methods of the second winding section include:

[0305] In each layer group, U-shaped conductors with a pitch of 8 and U-shaped conductors with a pitch of 12 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 12 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 12 and 8 equals 4.

[0306] The winding methods of the fourth winding section include:

[0307] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 10.

[0308] A U-shaped conductor with a pitch of 10 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0309] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0310] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0311] The winding of the different shapes of U-shaped conductors used in Example 2 can be referred to Example 1. The difference is the specific pitch of the U-shaped conductors, so it will not be repeated here.

[0312] [Example 3]

[0313] like Figure 17 As shown, embodiment 3 has a cross short distance structure, and the wires coming out of the welding end 21 of embodiment 3 are cross-phased. The specific phase belt arrangement of embodiment 3 is as follows:

[0314] In Example 3 of the present application, each phase unit spans four winding slots 111 circumferentially around the stator core 11. In the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. In the radial direction of the stator core 11, three consecutive winding slots 111 in two adjacent layers, arranged from the outside to the inside, form a staggered slot unit, resulting in a total of N staggered slot units. In each staggered slot unit, the first winding slot 111 group near the outer circumference of the stator core 11 is offset by one winding slot 111 in the clockwise direction relative to the second winding slot 111 group farther from the outer circumference. In a phase unit, all slot conductors 24 are in phase.

[0315] In Example 3: Each phase flat wire winding (Example 3 only takes the U-phase flat wire winding as an example, and the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first branches and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0316] The stator core 11 is continuously wound from the first layer to the 2N(6)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0317] At the 2N(6) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0318] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(6) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0319] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0320] Combine Figure 17 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0321] In this third embodiment, the winding grooves 111 have six layers, forming three layer groups.

[0322] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N(6) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0323] The winding methods of the first winding section include:

[0324] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 8.

[0325] A U-shaped conductor with a pitch of 8 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0326] The winding methods of the third winding section include:

[0327] In each layer group, U-shaped conductors with a pitch of 6 and U-shaped conductors with a pitch of 10 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 10 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 10 and 6 is 4.

[0328] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0329] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0330] The winding methods of the second winding section include:

[0331] In each layer group, U-shaped conductors with a pitch of 6 and U-shaped conductors with a pitch of 10 are alternately inserted across the layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 10 are also inserted across the layers between two adjacent layer groups to achieve winding transition between the layer groups. The difference between 10 and 6 is 4.

[0332] The winding methods of the fourth winding section include:

[0333] In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer insertion, and the pitch is 8.

[0334] A U-shaped conductor with a pitch of 8 is also used between two adjacent layer groups to perform cross-layer insertion to achieve winding transition between layer groups.

[0335] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0336] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0337] The winding of the different shapes of U-shaped conductors used in Example 3 can be referred to Example 1. The difference is the specific pitch of the U-shaped conductors, so it will not be repeated here.

[0338] [Example 4]

[0339] like Figure 18 As shown, the difference between Example 4 and Example 1 is the arrangement of the phase belts. Example 4 has a first separation short distance structure, and the welding end 21 of Example 4 is separated and out of phase. The specific arrangement of the phase belts in Example 4 is as follows:

[0340] In the first separated short-pitch structure, N is an odd number greater than 2. Each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11. Each rectangular winding slot 111 module occupies N winding slot 111 layers in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 circumferentially of the stator core 11. The two rectangular winding slot 111 modules are offset by one winding slot 111 circumferentially of the stator core 11. In this embodiment, N is 3, and the number of layers is 6; N can also be 5, 7, etc.

[0341] Each phase unit spans four winding slots 111 in the circumferential direction of the stator core 11. In the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. M layers of M winding slot 111 groups, connected from the outside to the inside in the radial direction of the stator core 11, are aligned in the circumferential direction of the stator core 11 to form two rectangular winding slot 111 modules: a first rectangular winding slot 111 module close to the outer circumference of the stator core 11, and a second rectangular winding slot 111 module away from the outer circumference of the stator core 11. The second rectangular winding slot 111 module is offset by one winding slot 111 in the clockwise direction from the first rectangular winding slot 111 module. In a phase unit, all slot conductors 24 in the first and second rectangular winding slot 111 modules are in phase.

[0342] In Example 4, each phase flat wire winding (Example 4 only uses the U-phase flat wire winding as an example; the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0343] The stator core 11 is continuously wound from the first layer to the 2N(6)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0344] At the 2N(6) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0345] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(6) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0346] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0347] Combine Figure 18 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0348] In this fourth embodiment, the winding grooves 111 have six layers, forming three layer groups.

[0349] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N(6) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0350] The winding methods of the first winding section include:

[0351] In each rectangular winding slot 111 module: all layer groups use U-shaped conductors with a pitch of 9 for cross-layer insertion;

[0352] The stator core 11 is radially arranged across the layer group of two rectangular winding slots 111 modules using a U-shaped conductor with a pitch of 10 for cross-layer insertion;

[0353] Between every two adjacent layer groups, a U-shaped conductor with a pitch of 9 is used to insert wires across the layers to achieve winding transition between the layer groups.

[0354] The winding methods of the third winding section include:

[0355] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0356] The layer groups spanning two rectangular winding slot 111 modules use U-shaped conductors with a pitch of 8 and U-shaped conductors with a pitch of 12 to alternately cross the layers along the circumference of the stator core 11, where 12-8 equals 4.

[0357] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0358] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0359] The winding methods of the second winding section include:

[0360] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0361] The layer groups spanning two rectangular winding slot 111 modules use U-shaped conductors with a pitch of 8 and U-shaped conductors with a pitch of 12 to alternately cross the layers along the circumference of the stator core 11, where 12-8 equals 4.

[0362] The winding methods of the fourth winding section include:

[0363] In each rectangular winding slot 111 module: all layer groups use U-shaped conductors with a pitch of 9 for cross-layer insertion;

[0364] The stator core 11 is radially arranged across the layer group of two rectangular winding slots 111 modules using a U-shaped conductor with a pitch of 10 for cross-layer insertion;

[0365] Between every two adjacent layer groups, a U-shaped conductor with a pitch of 9 is used to insert wires across the layers to achieve winding transition between the layer groups.

[0366] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0367] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0368] The winding of the different shapes of U-shaped conductors used in Example 4 can be referred to Example 1. The difference is the specific pitch of the U-shaped conductors, so it will not be repeated here.

[0369] [Example 5]

[0370] like Figure 19 As shown, the difference between Example 5 and Example 1 is the arrangement of the phase belts. Example 5 has a first separation short distance structure, and the welding end 21 of Example 5 is separated and out of phase. The specific arrangement of the phase belts in Example 5 is as follows:

[0371] In the first separated short-pitch structure, N is an odd number greater than 2. Each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11. Each rectangular winding slot 111 module occupies N winding slot 111 layers in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 circumferentially of the stator core 11. The two rectangular winding slot 111 modules are offset by one winding slot 111 circumferentially of the stator core 11. In this embodiment, N is 3, and the number of layers is 6; N can also be 5, 7, etc.

[0372] In Example 5 of the present application, each phase unit spans four winding slots 111 in the circumferential direction of the stator core 11. In the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. M layers of M winding slot 111 groups connected from the outside to the inside in the radial direction of the stator core 11 are aligned in the circumferential direction of the stator core 11 to form two rectangular winding slot 111 modules, namely a first rectangular winding slot 111 module close to the outer circumference of the stator core 11 and a second rectangular winding slot 111 module away from the outer circumference of the stator core 11. The second rectangular winding slot 111 module is offset by one winding slot 111 in the counterclockwise direction from the first rectangular winding slot 111 module. In a phase unit, all the in-slot conductors 24 in the first rectangular winding slot 111 module and the second rectangular winding slot 111 module are in phase.

[0373] In Example 5, each phase flat wire winding (Example 5 only uses the U-phase flat wire winding as an example; the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0374] The stator core 11 is continuously wound from the first layer to the 2N(6)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0375] At the 2N(6) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0376] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(6) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0377] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0378] Combine Figure 19From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0379] In this fifth embodiment, the winding grooves 111 have six layers, forming three layer groups.

[0380] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N(6) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0381] The winding methods of the first winding section include:

[0382] In each rectangular winding slot 111 module: all layer groups use U-shaped conductors with a pitch of 9 for cross-layer insertion;

[0383] The stator core 11 is radially arranged across the layer group of two rectangular winding slots 111 modules using a U-shaped conductor with a pitch of 8 for cross-layer insertion;

[0384] Between every two adjacent layer groups, a U-shaped conductor with a pitch of 9 is used to insert wires across the layers to achieve winding transition between the layer groups.

[0385] The winding methods of the third winding section include:

[0386] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0387] The layer group spanning two rectangular winding slot 111 modules uses U-shaped conductors with a pitch of 6 and U-shaped conductors with a pitch of 10 to alternately cross the layers along the circumference of the stator core 11, and 10-6 is equal to 4.

[0388] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0389] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0390] The winding methods of the second winding section include:

[0391] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0392] The layer group spanning two rectangular winding slot 111 modules uses U-shaped conductors with a pitch of 6 and U-shaped conductors with a pitch of 10 to alternately cross the layers along the circumference of the stator core 11, and 10-6 is equal to 4.

[0393] The winding methods of the fourth winding section include:

[0394] In each rectangular winding slot 111 module: all layer groups use U-shaped conductors with a pitch of 9 for cross-layer insertion;

[0395] The stator core 11 is radially arranged across the layer group of two rectangular winding slots 111 modules using a U-shaped conductor with a pitch of 8 for cross-layer insertion;

[0396] Between every two adjacent layer groups, a U-shaped conductor with a pitch of 9 is used to insert wires across the layers to achieve winding transition between the layer groups.

[0397] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0398] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0399] The winding of the different shapes of U-shaped conductors used in Example 5 can be referred to Example 1. The difference is the specific pitch of the U-shaped conductors, so it will not be repeated here.

[0400] [Example 6]

[0401] like Figure 20 As shown, the difference between Example 6 and Example 1 is the arrangement of the phase belts. Example 6 has a second separation short distance structure, and the welding end 21 of Example 6 is separated and out of phase. The specific arrangement of the phase belts in Example 6 is as follows:

[0402] N is a natural number greater than 2. The stator flat wire winding 12 has a first separated short-pitch structure. In this first separated short-pitch structure, N is an even number greater than 2. Each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11. Each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11. The two rectangular winding slot 111 modules are offset by one winding slot 111 in the circumferential direction of the stator core 11. In the embodiment of the present application, N is equal to 4, and the number of layers is 8; in other examples, the number of layers can also be 12, 16, etc.

[0403] In Example 6 of the present application, each phase unit spans four winding slots 111 in the circumferential direction of the stator core 11, and in the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. M layers of M winding slot 111 groups connected from the outside to the inside in the radial direction of the stator core 11 are aligned in the circumferential direction of the stator core 11 to form two rectangular winding slot 111 modules, namely a first rectangular winding slot 111 module close to the outer circumference of the stator core 11 and a second rectangular winding slot 111 module away from the outer circumference of the stator core 11. The second rectangular winding slot 111 module is offset by one winding slot 111 in the clockwise direction relative to the first rectangular winding slot 111 module. In a phase unit, all the in-slot conductor portions 24 in the first rectangular winding slot 111 module and the second rectangular winding slot 111 module are in phase.

[0404] In Example 6, each phase flat wire winding (Example 6 only uses the U-phase flat wire winding as an example; the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0405] The stator core 11 is continuously wound from the first layer to the 2N(8)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0406] At the 2N(8) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0407] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(8) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0408] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0409] Combine Figure 20 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0410] In this sixth embodiment, the winding grooves 111 have eight layers, forming four layer groups.

[0411] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N (8) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0412] The winding methods of the first winding section include:

[0413] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 9 are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of 9 are also used between two adjacent layer groups to perform inter-layer winding transition;

[0414] Between two layer groups belonging to different rectangular winding slot 111 modules, a U-shaped conductor with a pitch of 8 is used to perform cross-layer insertion to achieve winding transition between the layer groups.

[0415] The winding methods of the third winding section include:

[0416] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0417] Two layer groups belonging to different rectangular winding slot 111 modules use U-shaped conductors with a pitch of 10 to perform cross-layer insertion to perform winding transition between layer groups, where 10=11-1.

[0418] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0419] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0420] The winding methods of the second winding section include:

[0421] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0422] Two layer groups belonging to different rectangular winding slot 111 modules use U-shaped conductors with a pitch of 10 to perform cross-layer insertion to perform winding transition between layer groups, where 10=11-1.

[0423] The winding methods of the fourth winding section include:

[0424] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 9 are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of 9 are also used between two adjacent layer groups to perform inter-layer winding transition;

[0425] Between two layer groups belonging to different rectangular winding slot 111 modules, a U-shaped conductor with a pitch of 8 is used to perform cross-layer insertion to achieve winding transition between the layer groups.

[0426] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0427] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0428] The winding of the different shapes of U-shaped conductors used in Example 6 can be referred to Example 1. The difference is the specific pitch of the U-shaped conductors, so it will not be repeated here.

[0429] [Example 7]

[0430] like Figure 21As shown, the difference between Example 7 and Example 1 is the arrangement of the phase belts. Example 7 has a second separation short distance structure, and the welding end 21 of Example 7 is separated and out of phase. The specific arrangement of the phase belts in Example 6 is as follows:

[0431] N is a natural number greater than 2. The stator flat wire winding 12 has a first separated short-pitch structure. In this first separated short-pitch structure, N is an even number greater than 2. Each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot 111 modules in the radial direction of the stator core 11. Each rectangular winding slot 111 module occupies N layers of winding slots 111 in the radial direction of the stator core 11 and occupies three consecutively arranged winding slots 111 in the circumferential direction of the stator core 11. The two rectangular winding slot 111 modules are offset by one winding slot 111 in the circumferential direction of the stator core 11. In the embodiment of the present application, N is equal to 4, and the number of layers is 8; in other examples, the number of layers can also be 12, 16, etc.

[0432] In Example 7 of the present application, each phase unit spans four winding slots 111 in the circumferential direction of the stator core 11, and in the radial direction of the stator core 11, each layer of three consecutive winding slots 111 forms a winding slot 111 group. M layers of M winding slot 111 groups connected from the outside to the inside in the radial direction of the stator core 11 are aligned in the circumferential direction of the stator core 11 to form two rectangular winding slot 111 modules, namely a first rectangular winding slot 111 module close to the outer circumference of the stator core 11 and a second rectangular winding slot 111 module away from the outer circumference of the stator core 11. The second rectangular winding slot 111 module is offset by one winding slot 111 in the counterclockwise direction from the first rectangular winding slot 111 module. In a phase unit, all the in-slot conductor portions 24 in the first rectangular winding slot 111 module and the second rectangular winding slot 111 module are in phase.

[0433] In Example 7, each flat wire winding (Example 7 only uses the U-phase flat wire winding as an example; the V-phase flat wire winding and the W-phase flat wire winding are wound in the same manner) has two parallel first and second branches. The U-phase flat wire winding includes a parallel U-phase first branch U1 and a U-phase second branch U2.

[0434] The stator core 11 is continuously wound from the first layer to the 2N(8)th layer along the circumference of the stator core 11 from the inside to the outside, with the first branch forming a first winding section and the second branch forming a second winding section;

[0435] At the 2N(8) layer, the first branch forms the first transition section, and the second branch forms the second transition section;

[0436] The stator core 11 is continuously wound from the outside to the inside along the circumference of the stator core 11 from the 2N(8) layer to the 1st layer, with the first branch forming the third winding section and the second branch forming the fourth winding section;

[0437] Viewed from the same winding direction, the winding method of the first winding section is the same as that of the fourth winding section, and the winding method of the third winding section is the same as that of the second winding section. The winding directions include a first direction from the phase output terminal 51 to the phase lead terminal 52 and a second direction from the phase lead terminal 52 to the phase output terminal 51.

[0438] Combine Figure 21 From the perspective of winding direction, the first direction from the phase output terminal 51 to the phase lead terminal 52 is analyzed:

[0439] In this seventh embodiment, the winding grooves 111 have eight layers, forming four layer groups.

[0440] The first branch U1 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the first winding section. The first transition section is to use a U-shaped conductor with a pitch of 8 to insert the wires on the 2N (8) layer in the same layer, and to use a U-shaped conductor to continuously wind from the outside to the inside of the stator core 11 along the circumference of the stator core 11, and the first branch forms the third winding section.

[0441] The winding methods of the first winding section include:

[0442] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 9 are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of 9 are also used between two adjacent layer groups to perform inter-layer winding transition;

[0443] Between two layer groups belonging to different rectangular winding slot 111 modules, a U-shaped conductor with a pitch of 10 is used to perform cross-layer insertion to achieve winding transition between the layer groups.

[0444] The winding methods of the third winding section include:

[0445] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0446] Two layer groups belonging to different rectangular winding slot 111 modules use U-shaped conductors with a pitch of 12 to perform cross-layer insertion to perform winding transition between layer groups, where 12=11+1.

[0447] The twisted leg of an I-shaped conductor provided at the first branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the first winding section, and the twisted leg of an I-shaped conductor provided at the first branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the third winding section.

[0448] The second branch U2 of the U phase is continuously wound from the inside to the outside of the stator core 11 along the circumference of the stator core 11, and the second branch forms a second winding section. The second transition section uses a U-shaped conductor with a pitch of 10 to insert the wires on the 2N layer in the same layer, and is continuously wound from the outside to the inside of the stator core 11 along the circumference of the stator core 11. The second branch forms a fourth winding section.

[0449] The winding methods of the second winding section include:

[0450] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 7 and U-shaped conductors with a pitch of 11 are used in all layer groups to alternately insert wires across layers along the circumference of the stator core 11. U-shaped conductors with a pitch of 11 are also used between two adjacent layer groups to perform winding transitions between the layer groups. 11-7 equals 4;

[0451] Two layer groups belonging to different rectangular winding slot 111 modules use U-shaped conductors with a pitch of 12 to perform cross-layer insertion to perform winding transition between layer groups, where 12=11+1.

[0452] The winding methods of the fourth winding section include:

[0453] In each rectangular winding slot 111 module: U-shaped conductors with a pitch of 9 are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of 9 are also used between two adjacent layer groups to perform inter-layer winding transition;

[0454] Between two layer groups belonging to different rectangular winding slot 111 modules, a U-shaped conductor with a pitch of 10 is used to perform cross-layer insertion to achieve winding transition between the layer groups.

[0455] The twisted leg of an I-shaped conductor provided at the second branch phase outlet terminal 51 and used for outlet is connected to the twisted leg of the U-shaped conductor starting in the second winding section, and the twisted leg of an I-shaped conductor provided at the second branch phase lead terminal 52 and used for outlet is connected to the twisted leg of the U-shaped conductor ending in the fourth winding section.

[0456] It can be seen that the winding method of the first winding section of the U1 branch is the same as the winding method of the fourth winding section of the U2 branch, and the winding method of the third winding section of the U1 branch is the same as the winding method of the second winding section of the U2 branch.

[0457] like Figure 22 As shown, Figures 13 to 21 The line segments of different colors at the non-outlet end represent U-shaped conductors of different pitches.

[0458] The flat wire motor stator 1 provided in the present embodiment utilizes a rationally arranged winding structure, allowing for concentrated wire output within a relatively small area. This results in a simple structure, ease of production, and high efficiency. Furthermore, the winding end structure does not occupy the inner diameter space on one side of the stator, eliminating rotor installation limitations and providing greater flexibility in overall machine design.

[0459] The motor provided in the embodiment of the present application simplifies the manufacturing process, reduces costs, and can effectively reduce winding harmonics and reduce noise.

[0460] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A flat wire motor stator, characterized in that: The stator core comprises a stator iron core and a stator flat wire winding. The stator iron core is annular and has a plurality of winding slots formed on its inner wall along its circumference. The total number Q of the winding slots is a natural number and an even multiple of 3. The number of winding slot layers is 2N, where N is greater than or equal to 2. The stator flat wire winding is embedded in the plurality of winding slots and has a three-phase flat wire winding. The number of poles P of the stator flat wire winding is an even multiple of 3. The number of slots per pole per phase q is 3. Each phase flat wire winding has L parallel branches, where L is greater than or equal to 2. Each branch phase outlet and phase lead end are respectively provided with an I-shaped conductor for outlet. The phase outlet and the phase lead end of each branch are connected and wound by a plurality of U-shaped conductors. Each I-shaped conductor is correspondingly inserted into a winding slot, and each U-shaped conductor is correspondingly inserted into two winding slots. The U-shaped conductor has an insertion end and a welding end. The flat wire motor stator outlets the wire from the insertion end. The winding slot has a first side layer and a second side layer, the first side layer is one of the first layer closest to the inner circumference of the stator core and the 2Nth layer closest to the outer circumference of the stator core, and the second side layer is the other of the first layer closest to the inner circumference of the stator core and the 2Nth layer closest to the outer circumference of the stator core. The output structure of each phase flat wire winding is as follows: the phase output terminal and the phase lead terminal of each branch are arranged on the first side layer, and the plurality of winding slots corresponding to the phase output terminals of each branch are arranged in series to form a phase output slot row, and the plurality of winding slots corresponding to the phase lead terminals of each branch are arranged in series to form a phase lead slot row; Each phase flat wire winding includes two parallel first branches and second branches, which are continuously wound from the first side layer to the second side layer along the circumference of the stator core, the first branch forming a first winding section, and the second branch forming a second winding section; At the second side layer, the first branch forms a first transition section, and the second branch forms a second transition section; The winding is continuously performed from the second side layer to the first side layer along the circumference of the stator core. The first branch forms a third winding section, and the second branch forms a fourth winding section; Viewed from the same winding direction, the winding method of the first winding segment is the same as the winding method of the fourth winding segment, and the winding method of the third winding segment is the same as the winding method of the second winding segment. The winding direction includes a first direction from the phase output terminal to the phase lead terminal and a second direction from the phase lead terminal to the phase output terminal. The winding method includes a U-shaped conductor arrangement and connection rule with different pitches.

2. The flat wire motor stator according to claim 1, characterized in that: The U-shaped conductor has two vertical flat linear slot conductor parts formed between the insertion end and the welding end, and the U-shaped conductor welding end has two twisted legs outside the winding slot and corresponding to the two slot conductor parts respectively. The I-shaped conductor is vertically formed with an extended end and a connecting end, an in-slot conductor portion is formed between the extended end and the connecting end, the extended end is formed with an outlet portion for connecting a copper discharge wire, the connecting end is formed with a twisted leg, the connecting end and the welding end are welded together by the twisted leg of the I-shaped conductor and the twisted leg of the U-shaped conductor, and the extended end and the inserted end are on the same side in the axial direction of the stator core.

3. The flat wire motor stator according to claim 2, characterized in that: The wire outlet portion is in the shape of a vertical rod and extends vertically along the axial direction of the stator core.

4. The flat wire motor stator according to claim 1, characterized in that: The winding slot has N layer groups, each layer group has two adjacent odd-numbered layers and an even-numbered layer, The winding method of the first winding section includes: In each layer group, multiple U-shaped conductors with the same pitch are used for cross-layer wiring.

5. The flat wire motor stator according to claim 4, characterized in that: The first transition section uses a U-shaped conductor with a pitch of 8 to perform same-layer wiring in the second side layer.

6. The flat wire motor stator according to claim 4, characterized in that: N is a natural number greater than 2, and the stator flat wire winding has a full-pitch structure or a cross-short structure. U-shaped conductors with a pitch of a are used for inter-layer insertion in all the layer groups, and U-shaped conductors with a pitch of a are also used for inter-layer insertion between two adjacent layer groups to perform winding transition between the layer groups.

7. The flat wire motor stator according to claim 6, characterized in that: a is selected from 8, 9 or 10.

8. The flat wire motor stator according to claim 4, characterized in that: N is a natural number greater than 2, the stator flat wire winding has a first separated short-pitch structure, In the first separated short-pitch structure, N is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core. Each of the rectangular winding slot modules occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core. The two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core. In each rectangular winding slot module: U-shaped conductors with a pitch of a are used in all layer groups for cross-layer insertion; The layer groups of the stator core radially spanning the two rectangular winding slot modules are inserted across the layers using U-shaped conductors with a pitch of a±1; Between every two adjacent layer groups, a U-shaped conductor with a pitch of a is used to insert wires across the layers to achieve winding transition between the layer groups.

9. The flat wire motor stator according to claim 8, characterized in that: a is 9.

10. The flat wire motor stator according to claim 4, characterized in that: N is a natural number greater than 2, the stator flat wire winding has a second separated short-pitch structure, in which N is an even number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core. Each of the rectangular winding slot modules occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core. The two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core. In each rectangular winding slot module: U-shaped conductors with a pitch of a are used for inter-layer insertion in all layer groups, and U-shaped conductors with a pitch of a are also used between two adjacent layer groups to perform inter-layer winding transition; Between two layer groups belonging to different rectangular winding slot modules, a U-shaped conductor with a pitch of a' is used for cross-layer insertion to perform winding transition between the layer groups.

11. The flat wire motor stator according to claim 10, characterized in that: a is 9, and a' is selected from 8 or 10.

12. The flat wire motor stator according to claim 1, characterized in that: The winding slot has N layer groups, each layer group has two adjacent odd-numbered layers and an even-numbered layer, The winding method of the second winding section includes: In each layer group, two U-shaped conductors with a pitch difference of 4 are used to alternately cross the layers along the circumference of the stator core.

13. The flat wire motor stator according to claim 12, characterized in that: The second transition section uses a U-shaped conductor with a pitch of 10 to perform same-layer wiring in the second side layer.

14. The flat wire motor stator according to claim 12, characterized in that: N is a natural number greater than 2, and the stator flat wire winding has a full-pitch structure or a cross-short structure; In all the layer groups, U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across the layers along the circumference of the stator core. U-shaped conductors with a pitch of c are also inserted across the layers between two adjacent layer groups to perform winding transition between the layer groups, and cb is equal to 4.

15. The flat wire motor stator according to claim 14, characterized in that: b is 7, c is 11; Or, b is 8, c is 12; Or, b is 6 and c is 10.

16. The flat wire motor stator according to claim 12, characterized in that: N is a natural number greater than 2, the stator flat wire winding has a first separated short-pitch structure, in which N is an odd number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core, each of the rectangular winding slot modules occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core, and the two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core; In each rectangular winding slot module: U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across layers in all layer groups along the circumference of the stator core. U-shaped conductors with a pitch of c are also inserted across layers between two adjacent layer groups to perform winding transition between the layer groups, and cb is equal to 4; The layer group spanning two rectangular winding slot modules adopts U-shaped conductors with a pitch of b' and U-shaped conductors with a pitch of c' to alternately cross the layers along the circumference of the stator core, and c'-b' is equal to 4.

17. The flat wire motor stator according to claim 16, characterized in that: c'=c+1, b'=b+1; Or, c'=c-1, b'=b-1; Or, b is 7 and c is 11.

18. The flat wire motor stator according to claim 12, characterized in that: N is a natural number greater than 2, the stator flat wire winding has a second separated short-pitch structure, in which N is an even number greater than 2, and each phase unit of the flat wire winding has two consecutively arranged rectangular winding slot modules in the radial direction of the stator core, each of the rectangular winding slot modules occupies N layers of winding slots in the radial direction of the stator core and occupies three consecutively arranged winding slots in the circumferential direction of the stator core, and the two rectangular winding slot modules are offset by one winding slot in the circumferential direction of the stator core; In each rectangular winding slot module: U-shaped conductors with a pitch of b and U-shaped conductors with a pitch of c are alternately inserted across layers in all layer groups along the circumference of the stator core. U-shaped conductors with a pitch of c are also inserted across layers between two adjacent layer groups to perform winding transition between the layer groups, and cb is equal to 4; Two layer groups belonging to different rectangular winding slot modules respectively use U-shaped conductors with a pitch of c" to perform cross-layer insertion to perform winding transition between the layer groups, where c"=c±1.

19. The flat wire motor stator according to claim 18, characterized in that: b is 7, c is 11, and c” is 10 or 12.

20. The flat wire motor stator according to claim 2, characterized in that: The copper bar includes an outlet copper bar and a star point copper bar. The outlet portion extends out of the plug-in end of the U-shaped conductor. The copper bar is arranged on a side of the outlet portion facing the outer periphery of the stator core.

21. The flat wire motor stator according to claim 20, characterized in that: All outgoing wire ends of each phase of the flat wire winding are connected to the same outgoing wire copper bar, and the three-phase flat wire winding corresponds to three outgoing wire copper bars respectively; All phase lead ends of the three-phase flat wire winding are connected to the same star point copper bar; The three-phase flat wire winding is connected in star or delta.

22. A motor, characterized in that: A flat wire motor stator according to any one of claims 1 to 21.

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