CN115360844A

CN115360844A - Flat wire continuous winding device and winding method thereof

Info

Publication number: CN115360844A
Application number: CN202210819980.2A
Authority: CN
Inventors: 张莉; 李育宽; 林展汐; 郭守仑; 齐红阳; 李佩
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-11-18

Abstract

The invention particularly relates to a flat wire continuous winding device and a winding method thereof. The device comprises a winding, a non-lead-out wire side, a lead-out wire side and a lead-out wire; the leading-out wire side is positioned above the stator; the non-lead-out wire side is positioned below the stator; the outgoing line is led out from the outer layer of the outgoing line side and comprises a U-phase outgoing line, a V-phase outgoing line, a W-phase outgoing line and an outgoing line of a neutral point; the number of winding layers is 2*K, and the winding layers are embedded into a stator with the number of slots of each phase of each pole being M and the number of branches of the parallel motor being M. The method adopts a flat wire winding form, can adopt a continuous wave winding process, and is characterized in that all windings are integrally and continuously formed through a die, welding spots and welding sides are eliminated, only three-phase outgoing lines and neutral points need to be welded, all the windings can be synchronously and integrally formed, span adjustment times are few and convenient, and finally the wound cylindrical windings are radially expanded into stator slots through equipment.

Description

Flat wire continuous winding device and winding method thereof

Technical Field

The invention relates to the technical field of motors, in particular to a flat wire continuous winding device and a winding method thereof.

Background

In recent years, the market of new energy vehicles is rapidly developed, the driving motor of the new energy vehicle mainly takes a permanent magnet synchronous motor as a main part, wherein, compared with the permanent magnet synchronous motor with a round wire stator, a flat wire stator has obvious advantages in the aspects of slot fullness rate, end height, heat dissipation, NVH (noise, vibration and harshness), working condition efficiency and the like, so that the penetration ratio of the flat wire motor in the market shows a remarkable increasing trend.

Along with the increase of new energy market flat wire motor motorcycle type, showing of different motorcycle type volume production quantity promotes, and the production efficiency and the cost of flat wire motor have become the core of its development. At present, most domestic mass production flat wires adopt a contact pin winding form, and one side of a winding needs to be connected through welding, so that the tooling cost is increased, and the reliability of a motor stator is reduced.

The invention provides a flat wire stator of a permanent magnet synchronous motor for vehicles, such as Chinese patent CN110768410A, which is a flat wire stator of a permanent magnet synchronous motor for vehicles, and comprises a stator core and a main coil, wherein 12n coil slots are arranged on the stator core in the circumferential direction, n is a positive integer, each coil slot is sequentially divided into 4k layers according to the radial direction of the stator core, k is a positive integer, each two adjacent layers form a coil slot group, the main coil is radially arranged into k main coil layers along the stator core, the k main coil layers respectively correspond to the k coil slot groups, one end of the main coil is embedded into an outer layer of the coil slot group, the other end of the main coil is embedded into an inner layer of the coil slot group, the k main coil layers are concentrated in 9n continuous coil slots, and the stator core is provided with a secondary coil layer for connecting the main coil layers in parallel and two groups of leading-out wires for connecting the main coil layers in parallel.

The structure of the invention can improve the production efficiency of the motor stator. The coil is neat, the number of special-shaped wires is small, and the outgoing lines are concentrated and easy to connect. However, the main coil of the winding is a coil with the span of 6, after 12 layers of spanning are finished, the main coil enters 34 layers through a special-shaped coil, and after 34 layers of spanning are full, the main coil enters 56 layers through a special-shaped coil and sequentially enters the outermost layer, the winding is neat in appearance, the problem of balance among circumferential branches is not considered, no transposition is caused, the magnetic field environments among adjacent slots are different, and the problem of serious imbalance among different branches is caused. Is a typical pin winding principle solution, and the lead-out wires are arranged at the innermost and outermost layers.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a flat wire continuous winding device which is characterized by comprising a winding 22, a non-leading-out wire side 23, a leading-out wire side 24 and a leading-out wire 25; the outgoing line side 24 is located above the stator 21; the non-lead-out side 23 is located below the stator 21; the outgoing line 25 is led out from the outer layer of the outgoing line side 24 and comprises a U-phase outgoing line, a V-phase outgoing line, a W-phase outgoing line and an outgoing line of a neutral point; the number of layers of the winding 22 is 2*K, and the winding is embedded into a stator 21, wherein the number of slots of each pole and each phase is M, and the number of branches of a parallel motor is M.

Further, M is greater than or equal to 2, K is greater than or equal to 2, and the number of poles N is greater than or equal to 4.

Further, the number of the outgoing lines 25 is M × 2.

Further, the outgoing lines of the neutral points include a U-phase neutral point outgoing line, a V-phase neutral point outgoing line and a W-phase neutral point outgoing line; and connecting an outgoing line of the neutral point in the U-phase, an outgoing line of the neutral point in the V-phase and an outgoing line of the neutral point in the W-phase together to form a new neutral point.

Further, the winding 22 is wound in a cylindrical shape and radially expanded by the device into stator slots provided in the stator 21.

The invention also provides a winding method of the flat wire continuous winding device, each phase of the winding method comprises M parallel branches, each branch bypasses all the slots of the phase and bypasses 1-2*K layers of the slots, the 1 st layer and the 2 nd layer of the stator slot from outside to inside are the first circle, the 3 rd layer and the 4 th layer are the second circle … …, the 2 nd layer and the 2K th layer are the K th circle, and the like in sequence;

in the winding advancing process of the branch, the non-leading-out wire side 23 constantly strides over 3*M-1 stator slots; when the branch is wound for each circle, 3*M-1 stator slots are constantly spanned on the outgoing line side 24; after the branch is wound for the first circle, the branch enters the next circle in a spanning way, on the side 24 of the lead-out wire, if the branch is positioned in the outermost slot of the phase, the branch spans 3 × M +1 stator slots, and if the branch is positioned in the non-outermost slot of the phase, the branch spans 3*M-2 stator slots;

after the branch is wound around all the coils, the same-layer winding is carried out on the outermost layer, and then the winding is carried out reversely, wherein the winding mode for reversely winding is the same as that of the branch in the winding advancing process.

Furthermore, the branch circuit bypasses all the coils clockwise in the winding advancing process.

Furthermore, a continuous wave winding process is adopted during winding, and all the windings are integrally and continuously molded through a mold.

The invention also provides a motor stator which is characterized by comprising the flat wire continuous winding device.

The invention also provides a motor which is characterized by comprising the motor stator.

The invention has the beneficial effects that:

the invention relates to a flat wire continuous winding device and a method, firstly, a flat wire winding form is adopted, a continuous wave winding process can be adopted, all windings are integrally and continuously molded through a die, welding spots and welding sides are eliminated, and only three-phase lead-out wires and neutral points need to be welded.

Secondly, all lead-out wires of this winding principle all are located the outermost layer of stator, make full use of stator core yoke portion space when being convenient for weld, shorten axial dimension.

In addition, the side line type of the welding of the winding principle is completely consistent, the end part is regularly neat, the height of the end part is low, and each branch line spans all layers of all grooves of the phase, so that the circulation current is reduced to the maximum extent.

According to the scheme, all windings can be synchronously and integrally formed in the process, the span adjustment times are few and convenient, and finally the wound cylindrical windings are expanded into the stator slots from the radial direction through equipment.

Drawings

FIG. 1 is a schematic view of a stator;

FIG. 2 is a schematic diagram of the number of layers and turns in a continuous winding slot of a flat wire;

FIG. 3 is a partial schematic view of a flat continuous winding lead-out wire;

FIG. 4 is a schematic diagram showing the first branch U1 of the U phase being wound according to the winding principle;

FIG. 5 is a schematic expanded view of a winding principle of a second branch U2 of the U phase;

fig. 6 is a schematic expanded view of the winding principle of the third branch U3 of the U phase.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a flat wire continuous winding device, which comprises a winding 22, a non-lead-out wire side 23, a lead-out wire side 24 and a lead-out wire 25, wherein the lead-out wire side 24 is positioned above a stator 21; the non-lead-out side 23 is located below the stator 21; the outgoing line 25 is led out from the outer layer of the outgoing line side 24 and comprises a U-phase outgoing line, a V-phase outgoing line, a W-phase outgoing line and an outgoing line of a neutral point; the number of layers of the winding 22 is 2*K, and the winding is embedded into a stator 21 with the number of slots of each pole and each phase being M and the number of branches of a parallel motor being M.

M is greater than or equal to 2, K is greater than or equal to 2, and the pole number N is greater than or equal to 4; the number of the lead lines 25 is M × 2.

The outgoing line of the neutral point comprises an outgoing line of a U-phase neutral point, an outgoing line of a V-phase neutral point and an outgoing line of a W-phase neutral point; and connecting an outgoing line of the neutral point in the U-phase, an outgoing line of the neutral point in the V-phase and an outgoing line of the neutral point in the W-phase together to form a new neutral point. The winding 22 is wound in a cylindrical shape and is expanded radially by the device into stator slots provided in the stator 21.

The invention also provides a winding method of the flat wire continuous winding device, each phase of the winding method comprises M parallel branches, each branch bypasses all the slots of the phase and bypasses 1-2*K layers of the slots, the 1 st layer and the 2 nd layer of the stator slot from outside to inside are the first circle, the 3 rd layer and the 4 th layer are the second circle … …, the 2 nd layer and the 2 th layer are the Kth circle, and the like in sequence.

In the winding advancing process of the branch, the non-leading-out wire side 23 constantly strides over 3*M-1 stator slots; when the branch is wound for each circle, 3*M-1 stator slots are constantly spanned on the outgoing line side 24; after the branch is wound for the first circle, the branch enters the next circle in a spanning way, on the side 24 of the lead-out wire, if the branch is positioned in the outermost slot of the phase, the branch spans 3 × M +1 stator slots, and if the branch is positioned in the non-outermost slot of the phase, the branch spans 3*M-2 stator slots; and the branch circuit bypasses all the coils clockwise in the winding advancing process.

After the branch bypasses all the coils, the winding is reversely carried out after the same-layer winding is carried out on the outermost layer, and the winding mode of the reverse winding is the same as that of the branch in the winding advancing process. Furthermore, a continuous wave winding process is adopted during winding, and all the windings are integrally and continuously molded through a mold.

As a general technical concept, the invention also provides a motor stator, and the motor stator adopts the flat wire continuous winding device.

As a general technical concept, the present invention also provides a motor using a motor stator with the flat wire continuous winding.

The stator winding principle related in the invention firstly adopts a flat wire winding form, a continuous wave winding process can be adopted, all windings are integrally and continuously molded through a die, welding spots and welding sides are eliminated, and only three-phase lead-out wires and neutral points need to be welded.

Example 1.

The continuous winding device of the flat wire related in this embodiment is a 6-pole 54-slot winding device, the number of slots per pole and phase is 3, the number of layers of the flat wire winding is 8, and the number of branches of the parallel motor is 3.

Each phase of the flat wire winding device comprises 3 parallel branches, each branch bypasses all the slots of the phase, 1-8 layers of the branches bypass the slots, the position, close to the outer diameter, of each stator slot is the 1 st layer, the position, close to the inner diameter, of each stator slot is the 8 th layer, and the electromagnetic symmetry of each winding branch is guaranteed.

The turns in the stator slots are defined as: the 12 layers in the slot are the first turn, the 34 layers in the slot are the second turn, the 56 layers in the slot are the third turn, and the 78 layers in the slot are the fourth turn, and fig. 2 is a schematic diagram of the number of the layers and the turns in the slot of the flat wire winding.

During the winding process of the branch, the span of the non-leading-out wire side 23 is constant to be 9 and spans 8 stator slots.

The branch spans 8 stator slots with a constant 9 on the outgoing line side 24 at each winding turn.

After the branch passes through the first turn, it is necessary to perform a winding spanning into the next turn, for example, from the winding between 2 layers and 3 layers in the slot, the winding between 4 layers and 5 layers in the slot, and the winding between 6 layers and 7 layers in the slot, at the lead-out side 24, if it is located in the outermost slot of the phase, such as the 4 slots and 24 slots in this embodiment, the winding span is 11 to span 10 stator slots.

After the branch passes through the first turn, it is necessary to perform a winding spanning into the next turn, for example, from the winding between 2 layers and 3 layers in the slot, the winding between 4 layers and 5 layers in the slot, and the winding between 6 layers and 7 layers in the slot, at the leading line side 24, if it is located in the non-outermost slot of the phase, such as the U phase of the embodiment, and when it is located in 5 slots, 6 slots, 22 slots and 23 slots, the winding span at this position is 8 to span 7 stator slots.

After the branch bypasses all the coils clockwise, the winding is reversely carried out after the winding in the same layer is needed to be carried out in the 8 th layer on the outermost side, and the winding in the same layer follows the winding principle of cross-coil, and on the leading-out wire side 24, if the winding is positioned in the outermost slot of the phase, such as the U phase of the embodiment, the winding is positioned in 15 slots, and the winding span at the position is 11 to cross 10 stator slots; if it is located in the non-outermost slot of the phase, as in the case of the U-phase, at

slots

13 and 14, where the winding spans 8 across 7 stator slots.

Fig. 3 is a partial schematic view of a flat continuous winding outgoing line, wherein 1, 2, and 3 are U-phase three-branch outgoing lines connected together to form a U-phase outgoing line, and 10, 11, and 12 are U-phase neutral points; 7. 8 and 9 are V-phase three-branch outgoing lines which are connected together to form a V-phase outgoing line, and 16, 17 and 18 are V-phase neutral points; 13. 14 and 15 are W-phase three-branch outgoing lines which are connected together to form a W-phase outgoing line, and 4, 5 and 6 are W-phase neutral points; the outgoing lines of the

neutral points

4, 5, 6, 10, 11, 12, 16, 17 and 18 are connected together by the outgoing lines of three neutral points for each phase of U/V/W to form three new neutral points.

Take U-phase winding as an example;

the first branch is set as U1, the No. 13 slot layer 1 is the starting end of the leading-out wire, the span is 9, the first branch strides over 8 stator slots and sequentially passes through 22 slots, 2 layers, 31 slots, 1 layers, 40 slots, 2 layers, 49 slots, 1 layers and 4 slots, 2 layers, and the first winding and the second winding are completed.

The span is changed into 11 to cross 10 stator slots and enter 15 slots 3 layers, the span is restored to 9 to cross 8 stator slots and sequentially pass through 24 slots 4 layers, 33 slots 3 layers, 42 slots 4 layers, 51 slots 3 layers and 6 slots 4 layers, and the second winding of the third and fourth layers is completed.

The span is changed into 8 to cross 7 stator slots and enter 14 slots and 5 layers, and the span is restored to 9 to cross 8 stator slots and sequentially pass through 23 slots and 6 layers, 32 slots and 5 layers, 41 slots and 6 layers, 50 slots and 5 slots and 6 layers, so that the fifth and sixth layers of winding of the third circle are completed.

The span becomes 8 to cross 7 stator slots and enter 13 slots 7 layers, the span returns to 9 to cross 8 stator slots and pass through 22 slots 8 layers, 31 slots 7 layers, 40 slots 8 layers, 49 slots 7 layers and 4 slots 8 layers in sequence, the span becomes 11 to cross 10 stator slots and enter 15 slots 8 layers, and the seventh and eighth winding of the fourth turn is completed.

And then, carrying out cross winding in the reverse direction, wherein the span is recovered to 9 to cross 8 stator slots and sequentially pass through 6 slots 7 layers, 51 slots 8 layers, 42 slots 7 layers, 33 slots 8 layers and 24 slots 7 layers, and completing the seventh and eighth windings in the fourth turn after the reverse cross winding.

The span is changed into 11 to cross 10 stator slots and enter 13 slots 6 layers, the span is restored to 9 to cross 8 stator slots and sequentially pass through 4 slots 5 layers, 49 slots 6 layers, 40 slots 5 layers, 31 slots 6 layers and 22 slots 5 layers, and the fifth and sixth layers of winding are completed after reverse cross winding.

The span is changed into 8 to stride across 7 stator slots and enter 14 slots 4 layers, the span is restored to 9 to stride across 8 stator slots and sequentially pass through 5 slots 3 layers, 50 slots 4 layers, 41 slots 3 layers, 32 slots 4 layers and 23 slots 3 layers, and the second winding of the third layer and the fourth layer after reverse stride winding is completed.

The span is changed into 8 to stride across 7 stator slots and enter 15 slots 2 layers, the span is restored to 9 to stride across 8 stator slots and sequentially pass through 6 slots 1 layers, 51 slots 2 layers, 42 slots 1 layers, 33 slots 2 layers and 24 slots 1 layers, the first-circle first-layer winding and the second-layer winding after reverse stride winding are finished, and the first-circle first-layer winding and the second-layer winding are led out from 24 slots 1 layers to form a complete U-phase first-branch U1 winding.

The second branch is set as U2, the No. 14 slot layer 1 is the starting end of the outgoing line, the span is 9, the first branch strides over 8 stator slots and sequentially passes through the 23 slot layers 2, the 32 slot layers 1, the 41 slot layers 2, the 50 slot layers 1 and the 5 slot layers 2, and the first winding and the second winding are completed.

The span is changed into 8 to cross 7 stator slots and enter 13 slots 3 layers, and the span is restored to 9 to cross 8 stator slots and sequentially pass through 22 slots 4 layers, 31 slots 3 layers, 40 slots 4 layers, 49 slots 3 layers and 4 slots 4 layers, so that the second winding of the third and fourth layers of windings is completed.

The span is changed into 11 to cross 10 stator slots and enter 15 slots 5 layers, the span is restored to 9 to cross 8 stator slots and sequentially pass through 24 slots 6 layers, 33 slots 5 layers, 42 slots 6 layers, 51 slots 5 layers and 6 slots 6 layers, and the fifth and sixth layers of winding of the third circle are completed.

The span is changed into 8 to cross 7 stator slots and enter 14 slots 7 layers, the span is restored to 9 to cross 8 stator slots and sequentially pass through 23 slots 8 layers, 32 slots 7 layers, 41 slots 8 layers, 50 slots 7 layers and 5 slots 8 layers, the span is changed into 8 to cross 7 stator slots and enter 13 slots 8 layers, and the seventh winding and the eighth winding of the fourth turn are completed.

And then, carrying out reverse spanning, wherein the span is recovered to 9 to span 8 stator slots and sequentially pass through 4 slots 7 layers, 49 slots 8 layers, 40 slots 7 layers, 31 slots 8 layers and 22 slots 7 layers, and completing the seventh and eighth layers of windings in the fourth turn after the reverse spanning.

The span is changed into 8 to stride 7 stator slots and enter 14 slots 6 layers, the span is restored to 9 to stride 8 stator slots and pass 5 slots 5 layers, 50 slots 6 layers, 41 slots 5 layers, 32 slots 6 layers and 23 slots 5 layers in sequence, and the fifth and sixth layers of winding are completed after reverse striding winding is completed.

The span is changed into 8 to stride 7 stator slots and enter 15 slots 4 layers, the span is restored to 9 to stride 8 stator slots and pass 6 slots 3 layers, 51 slots 4 layers, 42 slots 3 layers, 33 slots 4 layers and 24 slots 3 layers in sequence, and the second winding of the third layer and the fourth layer after reverse striding winding is completed.

The span is changed into 11 to stride 10 stator slots and enter 13 slots 2 layers, the span is restored to 9 to stride 8 stator slots and sequentially pass through 4 slots 1 layers, 49 slots 2 layers, 40 slots 1 layers, 31 slots 2 layers and 22 slots 1 layers, the first winding and the second winding are reversely striden and wound, and the first winding and the second winding are led out from 22 slots 1 layers to form a complete U-phase second branch U2 winding.

The third branch is U3, the No. 15 slot layer 1 is the starting end of the leading-out wire, the span is 9 (the third branch strides over 8 stator slots to pass through 24 slots 2 layers, 33 slots 1 layers, 42 slots 2 layers, 51 slots 1 layers and 6 slots 2 layers in sequence, and the first winding (the first and second winding) is completed.

The span becomes 8 (cross 7 stator slots into 14 slots 3 layers, the span returns to 9 (cross 8 stator slots sequentially through 23 slots 4 layers, 32 slots 3 layers, 41 slots 4 layers, 50 slots 3 layers, 5 slots 4 layers, completing the second turn (third, fourth layer winding).

The span becomes 8 (crossing 7 stator slots into 13 slots 5 layers, the span returns to 9 (crossing 8 stator slots passing through 22 slots 6 layers, 31 slots 5 layers, 40 slots 6 layers, 49 slots 5 layers, 4 slots 6 layers in sequence, completing the third turn (fifth, sixth layer of winding).

The span becomes 11 (crosses over 10 stator slots into 15 slots 7 layers, the span returns to 9 (crosses over 8 stator slots sequentially through 24 slots 8 layers, 33 slots 7 layers, 42 slots 8 layers, 51 slots 7 layers, 6 slots 8 layers, completing the fourth turn (seventh, eighth layer winding, span becomes 8 (crosses over 7 stator slots into 14 slots 8 layers).

Then, the winding is reversely performed, and the span is recovered to 9 (the winding passes through 5 slots 7 layers, 50 slots 8 layers, 41 slots 7 layers, 32 slots 8 layers and 23 slots 7 layers in sequence across 8 stator slots, and the fourth winding (seventh and eighth windings) after the reverse winding is completed.

The span becomes 8 (crossing 7 stator slots into 15 slots 6 layers, the span returns to 9 (crossing 8 stator slots to pass 6 slots 5 layers, 51 slots 6 layers, 42 slots 5 layers, 33 slots 6 layers, 24 slots 5 layers in sequence, and the third turn (the fifth and sixth turns) after reverse crossing winding is completed.

The span becomes 11 (crosses 10 stator slots and enters 13 slots 4 layers, the span returns to 9 (crosses 8 stator slots and passes through 4 slots 3 layers, 49 slots 4 layers, 40 slots 3 layers, 31 slots 4 layers and 22 slots 3 layers in sequence, and the second winding (third and fourth windings) after reverse cross winding is completed.

The span is changed into 8 (the span crosses 7 stator slots and enters 14 slots 2 layers, the span is restored to 9 (the span crosses 8 stator slots and sequentially passes through 5 slots 1 layers, 50 slots 2 layers, 41 slots 1 layers, 32 slots 2 layers and 23 slots 1 layers, the reverse span winding is completed, the first circle (the first and second layers of winding are led out from 23 slots 1 layers, and a complete U-phase first branch winding is formed.

The V-phase winding is similar to the U-phase winding, the No. 19 slot 1 layer is a V1 outgoing line starting end, the No. 30 slot 1 layer is a V1 outgoing line leading-out end, the No. 20 slot 1 layer is a V2 outgoing line starting end, the No. 28 slot 1 layer is a V2 outgoing line leading-out end, the No. 21 slot 1 layer is a V3 outgoing line starting end, the No. 29 slot 1 layer is a V3 outgoing line leading-out end,

the W-phase winding is similar to the U-phase winding, and for the sake of uniformity of the molding process, the No. 16 slot 1 layer is a W1 outgoing line starting end, the No. 27 slot 1 layer is a V1 outgoing line leading end, the No. 17 slot 1 layer is a W2 outgoing line starting end, the No. 25 slot 1 layer is a W2 outgoing line leading end, the No. 18 slot 1 layer is a V3 outgoing line starting end, and the No. 26 slot 1 layer is a V3 outgoing line leading end, but the current direction is opposite to the winding.

Example 2.

As a general technical concept, the present invention also provides a motor stator, which employs the above-described flat wire continuous winding apparatus.

Example 3.

As a general technical concept, the present invention also provides a motor using a motor stator with the above-described flat wire continuous winding apparatus.

Claims

1. A flat wire continuous winding device is characterized by comprising a winding (22), a non-leading-out wire side (23), a leading-out wire side (24) and a leading-out wire (25); the outgoing line side (24) is located above the stator (21); the non-lead-out side (23) is located below the stator (21); the outgoing line (25) is led out from the outer layer of the outgoing line side (24) and comprises a U-phase outgoing line, a V-phase outgoing line, a W-phase outgoing line and an outgoing line of a neutral point; the number of layers of the winding (22) is 2*K, and the winding is embedded into a stator (21) with each pole, each phase of slots and parallel motor branches being M.

2. The flat wire continuous winding device according to claim 1, wherein M is greater than or equal to 2, K is greater than or equal to 2, and the number of poles N is greater than or equal to 4.

3. The flat wire continuous winding arrangement according to claim 2, characterized in that the number of lead-out wires (25) is M x 2.

4. The flat wire continuous winding device according to claim 1, wherein the lead-out line of the neutral point includes a lead-out line of a U-phase neutral point, a lead-out line of a V-phase neutral point, and a lead-out line of a W-phase neutral point; a leading line of the neutral point in the U-phase, a leading line of the neutral point in the V-phase and a leading line of the neutral point in the W-phase are connected together to form a new neutral point.

5. The flat wire continuous winding device according to claim 1, characterized in that the winding (22) is wound in a cylindrical shape and expanded radially by means of a device into stator slots provided on the stator (21).

6. A winding method of the flat wire continuous winding device according to claim 1, characterized in that each phase of the winding method comprises M parallel branches, each branch bypasses all the slots of the phase and bypasses 1-2*K layers of the slots, the 1 st and 2 th layers of the stator slots from outside to inside are the first circle, the 3 rd and 4 th layers are the second circle … …, the 2 nd and 2K layers are the Kth circles, and the like;

in the winding advancing process of the branch, the non-leading-out wire side (23) constantly strides over 3*M-1 stator slots; when winding each circle, the branch constantly strides 3*M-1 stator slots on the lead-out wire side (24); after the branch winds the first circle, the branch enters the next circle in a spanning way, on the side (24) of the leading-out line, if the branch is positioned in the outermost slot of the phase, the branch strides over 3 + M +1 stator slots, and if the branch is positioned in the non-outermost slot of the phase, the branch strides over 3*M-2 stator slots;

7. A winding method according to claim 5, characterized in that the legs are arranged to pass around all turns clockwise during the winding advance.

8. The method of claim 5, wherein the winding is performed by a continuous wave winding process, and the whole winding is continuously formed by a mold.

9. An electric machine stator, characterized in that it comprises a flat wire continuous winding arrangement according to claims 1-5.

10. An electrical machine, characterized in that the electrical machine comprises a machine stator according to claim 9.