Continuous wave winding copper wire multilayer stacked motor electromagnetic driving structure without insulation paper protection

Abstract

The invention discloses a continuous wave winding copper wire multilayer stacked motor electromagnetic driving structure without insulation paper protection. Comprising a stator shell and a continuous wave winding copper wire group wound outside a stator core, stator grooves are formed in the periphery of the stator shell, the continuous wave winding copper wire group is wound in the stator grooves, and the continuous wave winding copper wire group is formed by continuous wave winding of a plurality of groups of copper wire windings with different lengths and different distribution positions. And the plastic sheets are arranged on the end faces of the two axial ends of the stator iron core and are used for providing a protection effect when the continuous wave winding copper wire group is embedded into the stator iron core. According to the invention, the defect that the use amount of copper wires is purely increased so as to improve the motor performance is overcome, the electromagnetic performance of the system is improved, and the use amount of copper wires is greatly reduced; moreover, the use of insulation paper is eliminated, the process of manufacturing and embedding the insulation paper is omitted, and the production process of the stator core, the component layout of the electromagnetic driving structure and the material of the insulation layer of the copper wire winding are optimized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of two-wheeled electric vehicles and automobile parts manufacturing, and relates to a motor electromagnetic drive structure with simplified insulation protection, in particular to a motor electromagnetic drive structure with continuous wave copper wire multi-layer stacking and without insulation paper protection. BACKGROUND

[0002] At present, centralized winding motors and distributed winding motors commonly use insulation paper to physically isolate copper wire windings from stator cores. This scheme can effectively protect the insulation layer of the copper wire winding from being damaged by the stator core, and can further improve the insulation level between the copper wire winding and the stator core.

[0003] In combination with the electromagnetic drive structure characteristics of traditional centralized winding motors and distributed winding motors, the insulation paper can be pre-folded and embedded in the stator core slot, and then the copper wire is embedded by a wire inserting machine. Since the copper wire winding is segmented, the segmented embedding of the insulation paper does not have technical difficulties and can be efficiently produced. However, for the motor electromagnetic drive structure with continuous wave copper wire winding, the copper wire winding is a long section of continuous wave winding, and the insulation paper also needs to be made into a long section of continuous wave shape and pre-embedded in the stator core. After the copper wire winding is embedded, the excess insulation paper exposed outside the circumference of the stator core needs to be cut off, which has high technical difficulty and low efficiency in the cutting process, cannot effectively improve the production efficiency, and is also easy to cut the copper wire winding.

[0004] How to optimize the insulation scheme between the copper wire winding and the stator core for the motor electromagnetic drive structure with continuous wave copper wire winding, while efficiently assembling the copper wire winding and the stator core, has become a problem that needs to be solved in the prior art. SUMMARY

[0005] In view of the problems and defects of the above background technology, the application simplifies the insulation structure design between the copper wire winding and the stator core for the motor electromagnetic drive structure with continuous wave copper wire winding, and improves the efficiency and qualification rate of batch production.

[0006] In view of the problems in the above background technology, the application develops a motor electromagnetic drive structure without using insulation paper protection and is applied to motor production. This scheme cancels the use of insulation paper, saves the process of insulation paper production and embedding, optimizes the production process of the stator core, the component layout of the electromagnetic drive structure, and the material of the copper wire winding insulation layer. In the case of canceling the use of insulation paper, the insulation performance and production feasibility of the electromagnetic drive structure can also be guaranteed.

[0007] Another aspect of the application develops a kind of electromagnetic drive structure using continuous wave copper wire and multi-layer stack and is applied to motor production, using the motor of this scheme is arranged in 12 inch rim, performance index is superior to the electromagnetic scheme of the industry commonly used multi-strand wire centralized winding.The copper wire of multi-strand wire centralized winding electromagnetic scheme is also optimized for the shortcoming of huge amount, and the use amount of copper wire is reduced in the scheme, and it is used in narrow space.

[0008] To achieve the above object, the application adopts the following technical solutions: It comprises a stator shell; It comprises a stator core, which is fixedly installed on the outer periphery of the stator shell; It comprises a rotor shell, which is arranged on the outer periphery of the stator core; It comprises a continuous wave copper wire group, which is wound in the stator slot opened on the outer periphery of the stator core; the continuous wave copper wire group is formed by continuously winding a plurality of copper wire groups with different lengths and different distribution positions; It comprises a plastic sheet, which is arranged on the axial end face of the stator core, and is used to provide protection when the continuous wave copper wire group is embedded in the stator core for installation.

[0009] The structure further comprises: It comprises a connecting assembly, and the continuous wave copper wire group is electrically connected to the busbar through the connecting assembly; It comprises a busbar, which is connected to an external power supply.

[0010] The arc-shaped portion of the insulating plastic sheet comprises a tooth structure on the outer side, and the tooth shape is consistent with the tooth structure shape of the end face of the stator core; The arc-shaped portion of the insulating plastic sheet has a limiting support for positioning and increasing strength, which is formed by protruding compared to the tooth structure; the arc-shaped portion and the tooth structure on the side in contact with the stator core are designed as a plane, and the edges on the side not in contact with the stator core are designed and processed as round corners.

[0011] As a preferred embodiment, all the edges of the insulating plastic sheet away from the end face of the stator core are designed as round corners, which facilitates the copper wire winding to enter the stator core slot.

[0012] In a specific embodiment, the arc-shaped portion and the tooth structure of the insulating plastic sheet are integrally formed by material molding.

[0013] The application cancels the use of insulating paper, saves the processes of making, embedding and cutting insulating paper, simplifies the number of processes and reduces the process difficulty, which greatly helps to improve the production efficiency of the motor electromagnetic drive structure of the continuous wave copper wire group.

[0014] The stator core is made of a plurality of stator core punching sheets arranged in a radial direction and connected by a self-bonding process, and the burrs of the stator core punching sheets of the outermost layer of the stator core are arranged towards the axial aspect inward.

[0015] The outer circumferential surface of the stator core is circumferentially spaced apart to form N stator slots, and the stator teeth are formed between adjacent stator slots, and each copper wire winding of the continuous wave copper wire group is embedded into the stator slot from the outside to the inside. The continuous wave copper wire group is divided into a plurality of copper wire windings, and each copper wire winding is continuously wound in an S-shaped path with two stator slots as a period, that is, each copper wire winding is continuously wound in an S-shaped path on a plurality of stator slots with an interval of two stator slots, and finally connected to the bus bar through the connecting assembly, and the bus bar is connected to the external power supply; adjacent copper wire windings are wound in a staggered manner with an interval of k stator slots in a preset clock direction along the circumferential direction of the stator core, and the preset clock direction is one of clockwise or counterclockwise.

[0016] Each stator slot is basically opened along the axial direction of the motor main shaft and is inclined and penetrates parallel, so that the copper wire of the copper wire winding wound in the stator slot is arranged obliquely to the motor main shaft; Each stator slot of the stator shell is not completely opened along the axial direction of the main shaft, but is inclined to the tangential direction by an angle of 4.75°-5.3° on the basis of being parallel to the axial direction, so that the copper wire of the copper wire winding wound in the stator slot is arranged obliquely to the tangential direction by an angle of 4.75°-5.3° on the basis of being parallel to the axial direction.

[0017] The continuous wave copper wire group includes four kinds of copper wire windings with different lengths, and the four kinds of copper wire windings with different lengths are used to wind in the continuous stator slots covering 1 / 4, 2 / 4, 3 / 4, and 4 / 4 of the entire circumferential direction of the stator core. Alternatively / and the continuous wave copper wire group includes four kinds of copper wire windings with different starting points, and the starting points of the four kinds of copper wire windings with different starting points are respectively wound from the stator slots in the middle of the upper side, the middle of the left side, the middle of the lower side, and the middle of the right side of the stator core. Alternatively / and the continuous wave copper wire group includes four kinds of copper wire windings with different ending points, and the ending points of the four kinds of copper wire windings with different ending points are respectively wound to the stator slots in the middle of the upper side, the middle of the left side, the middle of the lower side, and the middle of the right side of the stator core.

[0018] The continuous wave copper wire group is designed by the above-mentioned design, and the special design of different groups, wiring and connection in the continuous wave copper wire group forms simple and effective winding and wiring, the entire copper amount is significantly reduced, and the performance and efficiency of motor control can be significantly improved.

[0019] The continuous wave copper wire group includes seven different lengths and distribution positions of copper wire groups, each of which contains three copper wire groups, a total of 21 copper wire groups. The first copper wire group contains three copper wire groups that cover 1 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots near the upper middle of the stator core, and the ending points are respectively wound to the three stator slots in the middle of the left side of the stator core. The second copper wire group contains three copper wire groups that cover 2 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots in the upper middle of the stator core, and the ending points are respectively wound to the three stator slots near the lower middle of the stator core. The third copper wire group contains three copper wire groups that cover 3 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots near the upper middle of the stator core, and the ending points are respectively wound to the three stator slots in the middle of the right side of the stator core. The fourth copper wire group contains three copper wire groups that cover 4 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots in the upper middle of the stator core, and the ending points are respectively wound to the three stator slots near the upper middle of the stator core. The fifth copper wire group contains three copper wire groups that cover 3 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots near the left side of the stator core, and the ending points are respectively wound to the three stator slots in the upper middle of the stator core. The sixth copper wire group contains three copper wire groups that cover 2 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots in the lower middle of the stator core, and the ending points are respectively wound to the three stator slots near the upper middle of the stator core. The seventh copper wire group contains three copper wire groups that cover 1 / 4 of the complete circumference of the stator core, and the starting points of the three copper wire groups are respectively wound from the three stator slots near the right side of the stator core, and the ending points are respectively wound to the three stator slots in the upper middle of the stator core.

[0020] Among the 21 copper wire groups of the seven different lengths and distribution positions of copper wire groups: On the left side of the stator core: the ending points of the three copper wire groups of the first copper wire group are respectively connected to the starting points of the three copper wire groups of the fifth copper wire group. On the lower side of the stator core: the terminal ends of the three copper wire windings of the second kind of copper wire winding are respectively connected to the initial ends of the three copper wire windings of the sixth kind of copper wire winding in correspondence; On the right side of the stator core: the terminal ends of the three copper wire windings of the third kind of copper wire winding are respectively connected to the initial ends of the three copper wire windings of the seventh kind of copper wire winding in correspondence; On the upper side of the stator core: The initial ends of the first and last copper wire windings of the first kind of copper wire winding are respectively connected to the initial ends of the first and last copper wire windings of the third kind of copper wire winding in correspondence, and the initial ends of the first and last copper wire windings of the fourth kind of copper wire winding are respectively connected to the initial ends of the first and last copper wire windings of the sixth kind of copper wire winding in correspondence, and the initial ends of the middle copper wire winding of the second kind of copper wire winding and the fourth kind of copper wire winding and the terminal ends of the middle copper wire winding of the fifth kind of copper wire winding and the seventh kind of copper wire winding are connected together; The initial ends of the middle copper wire winding of the first kind of copper wire winding, the initial ends of the middle copper wire winding of the third kind of copper wire winding, the terminal ends of the middle copper wire winding of the fourth kind of copper wire winding, and the terminal ends of the middle copper wire winding of the sixth kind of copper wire winding are connected together to form the second phase of the three-phase line; the initial ends of the first copper wire winding of the second kind of copper wire winding and the fourth kind of copper wire winding and the terminal ends of the first copper wire winding of the fifth kind of copper wire winding and the seventh kind of copper wire winding are connected together to form the third phase of the three-phase line; the initial ends of the last copper wire winding of the second kind of copper wire winding and the fourth kind of copper wire winding and the terminal ends of the last copper wire winding of the fifth kind of copper wire winding and the seventh kind of copper wire winding are connected together to form the first phase of the three-phase line.

[0021] The outer skin of the continuous wave copper wire winding group is made of PEEK material, i.e., polyether ether ketone. Without the protection of insulating paper, PEEK material has high temperature resistance, high strength, anti-creeper, wear resistance, fatigue resistance, and other properties that are very suitable for current harsh use environments.

[0022] The rotor shell is arranged outside the periphery of the stator core, the rotor steel yoke is fixedly installed on the inner peripheral surface of the ring part of the rotor shell, and the permanent magnet is fixed on the inner peripheral surface of the rotor steel yoke. There is a gap between the permanent magnet and the stator core.

[0023] At the bus bar position, the copper wire mounting groove of the connecting assembly is designed as an open type. In combination with the three-phase circuit structure characteristics of the electromagnetic drive structure, the welding operation efficiency and convenience of each end of the copper wire are improved. The connecting assembly is preferentially welded to the bus bar, and then the copper wire end is bent and adjusted to the copper wire mounting groove of the connecting assembly for laser welding. This scheme ensures the lap precision and welding quality between the bus bar, the connecting assembly, and the copper wire end, and is also conducive to automatic operation.

[0024] The three-phase circuit structure uses epoxy resin pouring with high thermal conductivity, and the vacuum pouring mode is from the bottom to overflow to the top. The traditional motor pours the epoxy resin into the three-phase circuit from top to bottom, which is easy to produce pores, and needs to be reduced to normal atmospheric pressure several times to eliminate the tedious operation of bubbles. The present application can pour the epoxy resin into the required value at one time, and the whole process is in an uninterrupted vacuum environment, which is not easy to produce bubbles, and has great advantages in production efficiency and production quality.

[0025] The beneficial effects of the present application are: The present application cancels the use of insulating paper, saves the processes of insulating paper making, insulating paper embedding and insulating paper cutting, simplifies the number of processes, and reduces the process difficulty. It greatly helps to improve the production efficiency of the motor electromagnetic drive structure of the continuous wave copper wire group.

[0026] The present application develops a process idea of canceling insulating paper for the motor electromagnetic drive structure of the continuous wave copper wire group, reduces the process obstacles of the design scheme, and helps engineers to boldly innovate in the field of motor electromagnetic drive structure design of the continuous wave copper wire group.

[0027] Moreover, the motor electromagnetic drive structure of the present application discards the disadvantage of simply increasing the use amount of copper wire to improve the performance of the motor, and opens up a brand new idea for designing electromagnetic schemes in narrow spaces. Under the condition of limited space, it breaks out of the framework of traditional design ideas and designs a new electromagnetic scheme.

[0028] The new motor electromagnetic scheme of the present application not only improves the electromagnetic performance of the system, but also greatly reduces the use amount of copper wire, providing great help for motor research and development and saving production cost.

[0029] The present application changes the copper wire installation groove of the connecting assembly into an open structure. It well solves the operation difficulties of copper wire end bending operation under the closed state of the copper wire installation groove and the operation difficulty of copper wire end not easy to penetrate into the copper wire installation groove. It greatly improves the convenience of manual operation and provides feasibility for designing automatic operation design.

[0030] The present application designs the pouring method of epoxy resin as from bottom to top. The fluidity of epoxy resin fills the pores of the three-phase circuit well during the overflow process, so that the glue injection process is completed at one time in a vacuum state, the generation of bubbles is reduced, and the production efficiency and product quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the electromagnetic drive structure of the present application.

[0032] Figure 2 is a schematic diagram of a structure using insulating paper.

[0033] Figure 3 is the structure diagram of removing the insulating paper.

[0034] Figure 4 is the installation diagram of the plastic sheet and the stator core.

[0035] Figure 5 is the installation cross-sectional diagram of the plastic sheet and the stator core.

[0036] Figure 6 is the cross-sectional diagram of the single-piece stator core punching sheet.

[0037] Figure 7 is the cross-sectional diagram of the self-adhesive stacking of the stator core punching sheet.

[0038] Figure 8 is the schematic diagram of the No. 1 copper wire shape of the continuous wave copper wire group of the present application.

[0039] Figure 9 is the schematic diagram of the four specifications of the winding copper wire used in the continuous wave copper wire group of the present application.

[0040] Figure 10 is the schematic diagram of the electric path direction of the stator of the present application.

[0041] Figure 11 is the schematic diagram of the copper wire inserted and stacked in sequence of the present application.

[0042] Figure 12 is the schematic diagram of the circuit wire group assembly wiring of the present application.

[0043] Figure 13 is the schematic diagram of the No. 1 wire insertion position and installation state of the present application.

[0044] Figure 14 is the schematic diagram of the circuit axial direction of the stator of the present application.

[0045] Figure 15 is the schematic diagram of the No. 1-21 copper wire of the present application.

[0046] Figure 16 is the position structure diagram of the No. 1-3 copper wire on the stator shell of the present application.

[0047] Figure 17 is the position structure diagram of the No. 4-6 copper wire on the stator shell of the present application.

[0048] Figure 18 is the position structure diagram of the No. 7-9 copper wire on the stator shell of the present application.

[0049] Figure 19 is the position structure diagram of the No. 10-12 copper wire on the stator shell of the present application.

[0050] Figure 20 is the position structure diagram of the copper wire No. 13-15 on the stator shell of the present application.

[0051] Figure 21 is the position structure diagram of the copper wire No. 16-18 on the stator shell of the present application.

[0052] Figure 22 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0053] Figure 23 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0054] Figure 24 is the partial enlarged view of Figure 23 .

[0055] Figure 25 is the partial enlarged view of .

[0056] Figure 26 is the partial enlarged view of .

[0057] Figure 27 is the partial enlarged view of .

[0058] Figure 28 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0059] Figure 29 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0060] Figure 30 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0061] Figure 31 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0062] Figure 32 is the position structure diagram of the copper wire No. 19-21 on the stator shell of the present application.

[0063] In the figure: rotor shell (1), rotor steel yoke (2), permanent magnet (3), continuous wave winding copper wire group (4), connecting assembly (5), stator shell (6), busbar (7), plastic sheet (8), stator core (9). DETAILED DESCRIPTION

[0064] The technical solutions of the present application will be further specifically described below in combination with the drawings, but are not limited to the protection scope of the present application.

[0065] As shown in Figure 1 , the motor electromagnetic drive structure includes a rotor shell 1, a rotor steel yoke 2, a permanent magnet 3, a continuous wave copper wire winding group 4, a connecting assembly 5, a stator shell 6, a busbar 7, a plastic sheet 8, and a stator core 9.

[0066] The stator shell 6 is included; The stator core 9 is included, which is fixedly installed on the outer periphery of the stator shell 6; The rotor shell 1 is included, which is arranged on the outer periphery of the stator core 9; The continuous wave copper wire winding group 4 is included, which is wound in the stator slots opened on the outer periphery of the stator core 9; the continuous wave copper wire winding group 4 is formed by continuously winding a plurality of groups of copper wires with different lengths and different distribution positions; The plastic sheet 8 is included, as shown in Figure 3 and Figure 4 , the plastic sheet 8 is arranged on the axial end faces of the stator core 9, which is used to provide a protection function when the continuous wave copper wire winding group 4 is embedded in the stator core 9 for installation, so as to prevent the surface of the continuous wave copper wire winding group 4 from being scratched by the stator core 9; The connecting assembly 5 is included, and the continuous wave copper wire winding group 4 is electrically connected and overlapped with the busbar 7 through the connecting assembly 5; The busbar 7 is included, and the three-phase circuit of the motor electromagnetic drive structure is connected to an external power supply through the busbar 7.

[0067] The stator core 9 is further arranged outside the stator shell 6, and the stator shell 6 and the stator core 9 are assembled by interference fit. The rotor shell 1 is arranged on the outer periphery of the stator core 9, the rotor steel yoke 2 is fixedly installed on the inner periphery of the ring part of the rotor shell 1, the permanent magnet 3 is fixed on the inner periphery of the rotor steel yoke 2, which is used to cooperate with the continuous wave copper wire winding group 9, and there is a gap between the permanent magnet 3 and the stator core 9.

[0068] The conventional installation of the insulating paper is shown in Figure 2 , the insulating paper is folded according to the shape of the stator slot in advance and is installed. In order to prevent the copper wire winding from being scratched by the inner wall of the stator slot, the length of the insulating paper needs to be increased in the axial and radial directions of the stator, so as to completely cover the inner wall of the stator slot. After the wire embedding process is completed, the insulating paper exceeding the outer periphery of the stator core 9 needs to be trimmed and removed. Combined with the fact that the stator core 9 of the present application has 168 stator slots, the three processes of paper folding, paper installation, and paper trimming will be a very large workload, and the process operation is also relatively complicated. Another solution is to continuously weave the insulating paper into the stator slot in a continuous wave shape. Although this solution can be automatically installed by a machine, the process of trimming the excess paper after the wire embedding is still a huge workload, and the disadvantage is obvious in large-scale production.

[0069] As shown in Figure 3 and Figure 4As shown, the insulating plastic sheet 3 of the present invention is arranged on the end face of the iron core 4 of the outer rotor hub motor to protect the iron core slot and allow the copper wire winding to be smoothly installed. The copper wire winding passes through the toothed groove of the insulating plastic sheet 3 and enters the toothed slot of the iron core 4.

[0070] The main body of the insulating plastic sheet 3 includes an arc-shaped part that matches the inner edge of the end face of the iron core 4. The outer side of the arc-shaped part is connected with a toothed structure, and the tooth shape matches the toothed structure shape of the end face of the iron core 4. The arc-shaped portion of the insulating plastic sheet 3 protrudes from the tooth structure to form a limiting support 2 for positioning and increasing strength. The arc-shaped portion and tooth structure of the insulating plastic sheet 3 are set as a plane on the side surface that contacts the iron core 4, and have a rounded corner 1 structure on the other side. That is, the edges of the arc-shaped portion and tooth structure on the side surface that does not contact the iron core 4 are all designed and processed as rounded corners 1.

[0071] This invention adds a limiting support 2 to the insulating plastic sheet, facilitating the operator's application using specialized tooling. The insulating plastic sheet is made of plastic, allowing for rapid and low-cost production using injection molding, and it can withstand the temperature environment inside an external rotor hub motor. Furthermore, the insulating plastic sheet structure itself incorporates a limiting support structure, making it easy for the operator to apply the insulating plastic sheet using specialized tooling. Additionally, one edge of the contact surface is rounded with a corner 1, facilitating the entry of the copper wire winding into the slot of the iron core 4 without damage. This redesigned insulating plastic sheet is superior to the original design.

[0072] In practice, the shape of the plastic sheet 8 is set according to the shape of the stator slot and slightly extends beyond the outer circumference of the stator core 9, such as... Figure 5 As shown, the plastic sheet 8 is bonded to both ends of the stator core 9 in the axial direction. When the copper wire winding is inserted into the stator slot, the plastic sheet 8 has a guiding effect, smoothly guiding the copper wire winding into the stator slot. During the process, the copper wire winding does not contact the outer circumferential edges of the stator core 9, and the surface of the copper wire winding is not easily scratched.

[0073] like Figure 7 As shown, the stator core 9 is made of multiple stator core laminations stacked radially and bonded together with each adjacent layer using a self-adhesive bonding process; as shown Figure 6 As shown, the stator core laminations are manufactured by stamping. Due to the manufacturing process, the stamping burrs will have a fixed orientation. For example... Figure 7 As shown, the burrs on the outermost stator core laminations of the stator core 9 are oriented inwards from the axial direction to avoid scratching the copper wire windings.

[0074] The continuous wave winding copper wire group 4 is embedded from outside to inside on the outer periphery of the stator core 9. The outer peripheral surface of the stator core 9 is provided with N stator slots at intervals in the circumferential direction, and the stator teeth are formed between adjacent stator slots. The continuous wave winding copper wire group 4 is embedded from outside to inside in the stator slots. In a specific implementation, the number N can be set to 168, which is an integer multiple of 4.

[0075] As shown in Figure 13 , the continuous wave winding copper wire group 4 is divided into a plurality of copper wire windings with different lengths and different distribution positions. Each copper wire winding is continuously wound in an S-shaped path on a plurality of stator slots at an interval of two stator slots. That is, in each stator slot wound by each copper wire winding, the adjacent stator slots wound by the copper wire are spaced apart by two vacant stator slots, thereby forming a continuous wave winding with a period of three stator slots.

[0076] As shown in Figure 13 , each copper wire winding is a copper wire with two ends. The two ends of the copper wire are not connected in a closed loop, and subsequent connection design connects the two ends of the copper wire of each copper wire winding.

[0077] As shown in Figure 11 , the adjacent copper wire windings are usually wound in a staggered manner with a fixed hourglass direction along the circumferential direction of the stator core 9 at an interval of one stator slot. The fixed hourglass direction is one of clockwise or counterclockwise.

[0078] There are a plurality of copper wires of copper wire windings in the stator slot. The copper wires of each copper wire winding are embedded in layers from the inside to the outside in the stator slot. This staggered winding cooperates with the embedding in layers from the inside to the outside to ultimately cause the same number of copper wires of copper wire windings to exist in each stator slot.

[0079] Finally, as shown in Figure 12-14 , a multi-level continuous wave winding copper wire is formed.

[0080] As shown in Figure 10 , the stator slot is provided with a through hole at both ends and the outer side. Each stator slot is provided with a through hole at both ends and the outer side. Each stator slot is provided with a through hole at both ends and the outer side. The copper wire of the copper wire winding wound in the stator slot is also inclined to the motor main shaft.

[0081] As shown in Figure 8 , each stator slot of the stator core 9 is not completely provided along the axial direction of the main shaft 11, but is inclined to the tangential direction by an angle of 4.75°-5.3° based on the original parallel to the axial direction. The copper wire of the continuous wave winding copper wire group 4 in the stator slot is also arranged in the same way.

[0082] As shown in Figure 9As shown, the continuous wave winding copper wire group 4 includes four different lengths of copper wire winding, which are used to wind in the continuous number of stator slots accounting for 1 / 4, 2 / 4, 3 / 4, 4 / 4 of the total number of stator slots occupying the entire circumference of the stator core 9.

[0083] In other words, the continuous wave winding copper wire group 4 includes four different starting points of copper wire winding, and the starting points of the four different starting points of copper wire winding are respectively from the stator slots at the middle of the upper side, the middle of the left side, the middle of the lower side, and the middle of the right side of the stator core 9.

[0084] In other words, the continuous wave winding copper wire group 4 includes four different ending points of copper wire winding, and the ending points of the four different ending points of copper wire winding are respectively wound to the stator slots at the middle of the upper side, the middle of the left side, the middle of the lower side, and the middle of the right side of the stator core 9.

[0085] Each of the above-mentioned copper wire winding is also periodically S-shaped winding path continuous wave winding with three stator slots as a period.

[0086] As shown, Figure 15 The continuous wave winding copper wire group 4 includes seven different lengths and distribution positions of copper wire winding, each of which contains three copper wire windings, totaling 21 copper wire windings.

[0087] As shown, Figure 16 The first copper wire winding includes three copper wire windings each covering 1 / 4 of the stator slots in the complete circumference of the stator core 9, which are lines 1-3, as shown in Figure 11 In which, each adjacent two copper wire windings are arranged by being staggered by one stator slot in the fixed counterclockwise direction along the circumference, that is, the starting point and the ending point are arranged by being separated by one stator slot in the fixed clockwise direction. The starting points of the three copper wire windings are respectively from the three stator slots near the middle of the upper side of the stator core 9, and after winding in the fixed counterclockwise direction through 1 / 4 of the number of stator slots in the complete circumference of the stator core 9, the ending points are respectively wound to the three stator slots in the middle of the left side of the stator core 9.

[0088] As shown, Figure 17As shown, the second type of copper wire winding includes three copper wire windings, numbered 4-6, each covering 2 / 4 of the complete circumference of the stator core 9. Each pair of adjacent copper wire windings is staggered by one stator slot in a fixed counter-clockwise direction, meaning both the starting and ending points are spaced one stator slot apart in a fixed clockwise direction. Furthermore, the first copper wire winding, number 4, is also staggered by one stator slot apart in a fixed counter-clockwise direction compared to the last copper wire winding, number 3, in the previous type of copper wire winding. The starting points of the three copper wire windings begin from the three middle stator slots on the upper side of the stator core 9, and after winding counter-clockwise through 2 / 4 of the complete circumference of the stator core 9, the ending points are wound to the three stator slots near the lower middle of the stator core 9.

[0089] like Figure 18 As shown, the third type of copper wire winding includes three copper wire windings, numbered 7-9, each covering 3 / 4 of the complete circumference of the stator core 9. Each pair of adjacent copper wire windings is staggered by one stator slot in a fixed counter-clockwise direction, meaning both the starting and ending points are spaced one stator slot apart in a fixed clockwise direction. The first copper wire winding, number 7, is also staggered by one stator slot in a fixed counter-clockwise direction, similar to the last copper wire winding, number 6, in the previous type of copper wire winding. The starting points of the three copper wire windings correspond to the same three stator slots as the three copper wire windings in the first type of copper wire winding. They begin winding from the three stator slots near the upper middle of the stator core 9, winding in a fixed counter-clockwise direction through 3 / 4 of the complete circumference of the stator core 9, and then ending at the three stator slots at the very center of the right side of the stator core 9.

[0090] like Figure 19 As shown, the fourth type of copper wire winding includes three copper wire windings, numbered 10-12, each covering 4 / 4 of the stator slots of the stator core 9. Each pair of adjacent copper wire windings is staggered by one stator slot in a fixed counter-clockwise direction, meaning the starting and ending points are both set one stator slot apart in a fixed clockwise direction. The first copper wire winding, number 10, is also staggered by one stator slot in a fixed counter-clockwise direction, similar to the last copper wire winding, number 9, in the previous type of copper wire winding. The starting points of the three copper wire windings correspond to the same three stator slots as the three copper wire windings in the second type of copper wire winding. They begin winding from the three middle stator slots on the upper side of the stator core 9, winding in a fixed counter-clockwise direction through 4 / 4 of the stator slots of the stator core 9, and then ending at the three stator slots near the upper middle of the stator core 9.

[0091] like Figure 20As shown, the fifth copper wire winding includes three copper wire windings each covering 3 / 4 of the complete circumferential stator slots of the stator core 9, which are No. 13-15, wherein each two adjacent copper wire windings are arranged to be wound in a fixed counterclockwise direction with one stator slot interval, i.e., the start point and the end point are arranged to be spaced apart by one stator slot in a fixed clockwise direction; and the first copper wire winding No. 13 is also arranged to be wound in a fixed counterclockwise direction with one stator slot interval compared with the last copper wire winding No. 12 in the above copper wire winding. The start points of the three copper wire windings are arranged to be wound from the three stator slots near the left middle of the stator core 9, and after being wound in a fixed counterclockwise direction through 3 / 4 of the complete circumferential stator slots of the stator core 9, the end points of the three copper wire windings are arranged to be wound to the three stator slots in the middle of the upper side of the stator core 9, which are the same as the start points of the three copper wire windings of the second copper wire winding and the fourth copper wire winding.

[0092] As shown, Figure 21 the sixth copper wire winding includes three copper wire windings each covering 2 / 4 of the complete circumferential stator slots of the stator core 9, which are No. 16-18, wherein each two adjacent copper wire windings are arranged to be wound in a fixed counterclockwise direction with one stator slot interval, i.e., the start point and the end point are arranged to be spaced apart by one stator slot in a fixed clockwise direction; and the first copper wire winding No. 16 is also arranged to be wound in a fixed counterclockwise direction with one stator slot interval compared with the last copper wire winding No. 15 in the above copper wire winding. The start points of the three copper wire windings are arranged to be wound from the three stator slots in the middle of the lower side of the stator core 9, and after being wound in a fixed counterclockwise direction through 2 / 4 of the complete circumferential stator slots of the stator core 9, the end points of the three copper wire windings are arranged to be wound to the three stator slots near the middle of the upper side of the stator core 9, which are the same as the end points of the three copper wire windings of the fourth copper wire winding.

[0093] As shown, Figure 22As shown, the seventh copper wire winding includes three copper wire windings each covering 1 / 4 of the complete circumferential stator slot of the stator core 9, which are No. 19-21 lines, wherein each two adjacent copper wire windings are arranged to be wound and arranged to be staggered by one stator slot in a fixed counterclockwise direction along the circumference, that is, the starting point and the ending point are arranged to be separated by one stator slot in a fixed clockwise direction; and the first copper wire winding No. 19 line is also arranged to be wound and arranged to be staggered by one stator slot in a fixed counterclockwise direction along the circumference compared with the last copper wire winding No. 18 line in the previous copper wire winding. The starting points of the three copper wire windings are respectively wound from the three stator slots close to the right middle of the stator core 9, and after winding and arranging to be wound in a fixed counterclockwise direction through 1 / 4 of the complete circumferential stator core 9, the ending points of the three copper wire windings, the starting points of the three copper wire windings of the second copper wire winding and the fourth copper wire winding, and the ending points of the three copper wire windings of the fifth copper wire winding correspond to the same three stator slots, which are respectively wound to the three stator slots in the middle of the upper side of the stator core 9.

[0094] 1-21 lines of copper wire windings, each two adjacent copper wire windings are arranged to be wound and arranged to be staggered by one stator slot in a fixed counterclockwise direction along the circumference.

[0095] As shown in Figure 23-24 of the 21 copper wire windings of the seven different lengths and different distribution positions: As shown in Figure 24 (b) and Figure 25 As shown in the left side of the stator core 9, the ending points of the three copper wire windings of the first copper wire winding are respectively connected with the starting points of the three copper wire windings of the fifth copper wire winding, that is, the ending point 1E of the No. 1 line and the starting point 13S of the No. 13 line can be tightly electrically connected through the metal hoop connecting assembly, the ending point 2E of the No. 2 line and the starting point 14S of the No. 14 line can be tightly electrically connected through the metal hoop connecting assembly, and the ending point 3E of the No. 3 line and the starting point 15S of the No. 15 line can be tightly electrically connected through the metal hoop connecting assembly.

[0096] As shown in Figure 24 (c) and Figure 25 As shown in the lower side of the stator core 9, the ending points of the three copper wire windings of the second copper wire winding are respectively connected with the starting points of the three copper wire windings of the sixth copper wire winding, that is, the ending point 4E of the No. 4 line and the starting point 16S of the No. 16 line can be tightly electrically connected through the metal hoop connecting assembly, the ending point 5E of the No. 5 line and the starting point 17S of the No. 17 line can be tightly electrically connected through the metal hoop connecting assembly, and the ending point 6E of the No. 6 line and the starting point 18S of the No. 18 line can be tightly electrically connected through the metal hoop connecting assembly.

[0097] As shown in Figure 24 (d) andFigure 25 As shown in the right side of the stator core 9, the end terminals of the three copper wire windings of the third kind of copper wire winding are connected to the start terminals of the three copper wire windings of the seventh kind of copper wire winding, respectively, i.e. the end terminal 7E of the No. 7 wire and the start terminal 19S of the No. 19 wire can be tightly electrically connected through the metal clamp connecting assembly, the end terminal 8E of the No. 8 wire and the start terminal 20S of the No. 20 wire can be tightly electrically connected through the metal clamp connecting assembly, and the end terminal 9E of the No. 9 wire and the start terminal 21S of the No. 21 wire can be tightly electrically connected through the metal clamp connecting assembly.

[0098] The connecting assembly 5 is a conductive part that does not contact each other. The connecting assembly 5 helps the end portions of the respective copper wire windings to be efficiently electrically connected.

[0099] As shown in the right side of the stator core 9, Figure 24 (a) and Figure 25 As shown in the upper side of the stator core 9: The start terminals of the first and last copper wire windings of the first kind of copper wire winding are connected to the start terminals of the first and last copper wire windings of the third kind of copper wire winding, respectively, i.e. the start terminal 1S of the No. 1 wire and the start terminal 7S of the No. 7 wire can be tightly electrically connected through the metal clamp connecting assembly, and the start terminal 3S of the No. 3 wire and the start terminal 9S of the No. 9 wire can be tightly electrically connected through the metal clamp connecting assembly.

[0100] The start terminals of the first and last copper wire windings of the fourth kind of copper wire winding are connected to the start terminals of the first and last copper wire windings of the sixth kind of copper wire winding, respectively, i.e. the end terminal 10E of the No. 10 wire and the end terminal 16E of the No. 16 wire can be tightly electrically connected through the metal clamp connecting assembly, and the end terminal 12E of the No. 12 wire and the end terminal 18E of the No. 18 wire can be tightly electrically connected through the metal clamp connecting assembly.

[0101] The start terminals of the middle copper wire windings of the second and fourth kinds of copper wire winding and the end terminals of the middle copper wire windings of the fifth and seventh kinds of copper wire winding are connected together, i.e. the start terminal 5S of the No. 5 wire, the start terminal 11S of the No. 11 wire, the end terminal 14E of the No. 14 wire and the end terminal 20E of the No. 120 wire can be tightly electrically connected together through the metal clamp connecting assembly.

[0102] The first copper wire winding, the middle one of the third copper wire winding, the middle one of the fourth copper wire winding, the terminal end of the middle one of the sixth copper wire winding and the terminal end of the middle one of the seventh copper wire winding are connected together to form the second phase of the three-phase line, which is the V phase, and the first end 2S of the second phase of the busbar 7, i.e. the first end 8S of the eighth line, the terminal end 11E of the eleventh line and the terminal end 17E of the seventeenth line can be tightly and electrically connected together by the metal hoop connection assembly as the second phase output.

[0103] The first copper wire winding of the second copper wire winding and the fourth copper wire winding and the terminal end of the first copper wire winding of the fifth copper wire winding and the seventh copper wire winding are connected together to form the third phase of the three-phase line, which is the W phase, and the first end 4S of the fourth line of the busbar 7, i.e. the first end 10S of the tenth line, the terminal end 13E of the thirteenth line and the terminal end 19E of the nineteenth line can be tightly and electrically connected together by the metal hoop connection assembly as the third phase output.

[0104] The first copper wire winding of the second copper wire winding and the fourth copper wire winding and the terminal end of the first copper wire winding of the fifth copper wire winding and the seventh copper wire winding are connected together to form the third phase of the three-phase line, which is the W phase, and the first end 4S of the fourth line of the busbar 7, i.e. the first end 10S of the tenth line, the terminal end 13E of the thirteenth line and the terminal end 19E of the nineteenth line can be tightly and electrically connected together by the metal hoop connection assembly as the third phase output.

[0105] As shown in the drawings, Figure 14 The busbar 7 is installed on the upper side of the stator shell 6, and the three phases of the three-phase line are connected to the three phases of the busbar 7 through the electric wires on the stator shell 6, and finally led out by the busbar 7 and connected to the inverter through the three-phase cable.

[0106] In the specific implementation, as shown in the drawings, Figure 9 The present application uses four specifications of winding copper wires, and twenty-one copper wires are made according to the different lengths of the first and terminal lines, and each copper wire is arranged in order.

[0107] As shown in the drawings, Figure 13 , Figure 11 , Figure 12 The twenty-one copper wires are sequentially and tightly embedded in the stator core by the professional equipment line embedding device, and the copper wires and the stator core are isolated by using insulation paper.

[0108] As shown in the drawings, Figure 10 , Figure 14In the embodiment, the joints of the copper wires are respectively welded and overlapped by using the connectors to form a specially designed three-phase circuit. The three-phase circuit is finally connected to the three-phase cable through the busbar and is connected to the inverter by the cable. The principle of the system is that the controller receives and outputs signals to the inverter, and the inverter adjusts the current and voltage of the circuit to affect the output of the electromagnetic system, thereby controlling the operation.

[0109] The continuous wave copper wire winding is specially designed to be inclined at an angle in the axial direction, and the wire set is designed to be inclined at an angle of 4.95° (+0.35° / -0.2°). Combined with the structural characteristics of the continuous wave copper wire itself, the advantages are: 1) the cogging torque is reduced, and the vibration and noise are reduced; 2) the high-order harmonics are reduced, thereby reducing the iron loss and improving the motor efficiency; 3) the coil length and area are increased, so that the heat dissipation space is larger, the heat dissipation effect is improved, and the efficiency is higher.

[0110] As shown in Figure 26-31 , the copper wire mounting groove of the connecting assembly 5 is an open design and is distributed at the position of the busbar. Combined with the structural characteristics of the three-phase circuit structure of the electromagnetic drive structure, the welding operation efficiency and convenience of each end of the copper wire are improved. The connecting assembly 5 is preferentially welded to the busbar 7, and then the copper wire end is bent and adjusted to the copper wire mounting groove of the connecting assembly 5 for laser welding. This scheme ensures the lap precision and welding quality between the busbar 7, the connecting assembly 5 and the copper wire end, and is also beneficial to automatic operation.

[0111] As shown in Figure 28-30 , the three-phase circuit structure is filled with epoxy resin with high thermal conductivity, and the vacuum pouring method is to pour from the bottom and overflow to the top. The traditional motor pours the epoxy resin into the three-phase circuit from top to bottom, which is easy to produce pores and needs to be reduced to normal atmospheric pressure several times to exclude bubbles. The present application can pour the epoxy resin into the required value at one time, and the pouring position is at the bottom of the stator housing 6, and the required value is to immerse the entire three-phase circuit structure. The whole process is in an uninterrupted vacuum environment, which is not easy to produce bubbles, and has great advantages in production efficiency and product quality.

[0112] The embodiments of the present application are as follows: Example 1: In the embodiment, the electromagnetic design described in the present application adopts a permanent magnet synchronous scheme. Due to the limited installation space of the 12-inch rim motor, the motor is designed as an inner stator and an outer rotor structure (see Figure 14 ).

[0113] The winding circuit of the stator shell 6 as an internal stator uses continuous wave winding copper wire, which is stacked one layer after another into the stator core, and the copper wire contacts are connected by welding, thereby forming a three-phase circuit with a new structure. Then, the winding circuit structure part of the present application is filled with a two-component custom epoxy resin to fill the gap between the winding and the partition plate, thereby ensuring the stability, safety and heat dissipation performance of the winding circuit.

[0114] The entire motor electromagnetic drive structure is connected to the inverter for power supply through a three-phase cable, and then operates.

[0115] The embodiment innovatively designs the circuit arrangement, and the continuous wave winding copper wire has the structure feature of being formed in one time without breakpoints. The plugging step of a single wire is that the first end enters the stator first, and then the subsequent part is continuously embedded into the stator slot until the tail end is fixed in the stator slot.

[0116] To increase the interaction range of the circuit and the magnetic field, the circuit of the embodiment is arranged on the outer ring part of the stator shell 6, which changes the embedding direction of the copper wire to be from outside to inside, which is different from the traditional continuous wave winding copper wire circuit arranged from inside to outside.

[0117] The copper wire groups are evenly distributed on the outer ring of the stator. In this embodiment, Φ1.8mm round enameled copper wire is selected, and the single wire withstand voltage is 5000V. According to the number of single-sided bending arcs 6, 13, 20 and 27, four types are divided (see Figure 9 ), and 21 wires are designed (see Figure 15 ). The stator core wire slot is a total of 168 slots, and each wire is sequentially embedded in the respective point. Each slot is evenly distributed with 4 copper wires, and the single slot slot fullness rate is 47%. After the 2D bending process, the bending arc is 3D bent, and the wave arc structure is formed skillfully. This design helps the wires to be tightly stacked, compresses the electric path volume, and controls the diameter of the outer ring of the stator.

[0118] After the copper wire is fixed, the wire joints are welded and connected. The wire sequence is 1-21, S is the first end, and E is the end. The wiring layout (see Figure 24 、 Figure 23 ), and the wire sequence connection path in this example is: Other wire sequence connection paths: All the above copper wire winding joints are parallel welding connections, and are not allowed to contact other groups of copper wire windings not in the table.

[0119] The bus bar current phase connection path is: After the above circuit and magnetic field design, the stator and rotor size of the application are adjusted. The stator outer diameter containing the circuit part is designed as Φ274mm, the magnet air gap is designed as 0.8mm-1mm, and the minimum diameter of the rotor outer shell wall is 299.2mm. On the basis of the minimum diameter of the outer wall contour, the tire mounting surface structure is designed according to the standard size of 12-inch rim, and the overall outer contour diameter is finally determined as 330mm, which meets the industry standard.

[0120] Through experimental measurement: under 72V voltage, the efficiency of the application can reach more than 90%, the maximum peak power can reach 25KW, and the maximum peak torque can reach 420N.m. Under the same voltage, its performance exceeds the performance of the industry benchmark centralized winding electromagnetic scheme.

[0121] Due to the ingenious combination of circuit wiring structure and continuous wave winding copper wire design, the application not only improves the performance, but also reduces the amount of copper wire used and reduces the use cost. The amount of copper wire used is reduced to 1KG, which is only 40% of the amount of copper wire used in the benchmark centralized winding electromagnetic scheme.

[0122] Example 2 (application scheme): The difference between example 1 and example 2 is only that the applied voltage is different, and the applied rated voltage is set to 72V. Example 1 is 100V. The motor structure and parameters of example 1 and example 2 are consistent, and the voltage is different because the voltage provided by the inverter is different, and the performance exhibited is different.

[0123] Comparative example 1: As shown in (a) of Figure 32 , the existing continuous wave winding structure with embedded copper wire is used for comparison.

[0124] Comparative example 2: As shown in (b) of Figure 32 , the existing centralized winding structure is used for comparison.

[0125] Centralized winding structure schematic diagram; Comparative example 3: As shown in (c) of Figure 32 , the centralized winding structure under the existing outer stator and inner rotor structure is used for comparison.

[0126] Performance parameter comparison table of benchmark electromagnetic scheme As can be seen from the above table, under the same 72V voltage platform, the speed, peak torque, peak power and motor efficiency of the application are stronger than the industry benchmark motor. The speed is increased by about 0.8%, the peak torque is increased by about 10%, the peak power is increased by about 56%, and the motor efficiency is increased by 5%. The performance of the vehicle's endurance, acceleration and climbing is greatly improved.

[0127] In addition, the current industry leader puts forward new demands for high new energy vehicles, which requires that under the 96V voltage platform, the rotating speed is greater than or equal to 1500 rpm, the peak torque is greater than or equal to 450 N.m, the peak power is greater than or equal to 33 kw, and the motor efficiency is greater than or equal to 92%. The voltage platform of the present application can reach 100V, which meets the demand of the voltage platform, and the motor performance index also meets the demand.

[0128] The above specific embodiments are used to explain and illustrate the present application, rather than limit the present application, and any modification and change made to the present application within the spirit and protection scope of the claims fall within the protection scope of the present application.

[0129] The above is only the preferred embodiment of the present application, so any equivalent changes or modifications made to the structure, features and principles described in the scope of the present application are included in the scope of the present application.

Claims

1. A continuous wave winding copper wire multi-layer stack and insulation paper protection-free motor electromagnetic drive structure, characterized in that: it comprises a stator shell (6); it comprises a stator core (9) fixedly installed on the outer periphery of the stator shell (6); it comprises a rotor shell (1) arranged on the outer periphery of the stator core (9); it comprises a continuous wave winding copper wire group (4) wound in the stator slots formed on the outer periphery of the stator core (9); the continuous wave winding copper wire group (4) is formed by continuously winding a plurality of copper wire groups with different lengths and different distribution positions; it comprises a plastic sheet (8) arranged on the axial end faces of the stator core (9) to provide protection when the continuous wave winding copper wire group (4) is embedded in the stator core (9) for installation. The structure further comprises: it comprises a connecting assembly (5) for electrically connecting the continuous wave winding copper wire group (4) and the bus bar (7); it comprises a bus bar (7) connected to an external power supply.

3. The continuous wave winding copper wire multi-layer stack and insulation paper protection-free motor electromagnetic drive structure according to claim 1, characterized in that: the main body of the insulation plastic sheet (3) comprises an arc-shaped portion, the outer side of the arc-shaped portion is connected with a tooth structure, and the tooth shape is consistent with the tooth structure shape of the end face of the core (4); the arc-shaped portion of the insulation plastic sheet (3) is provided with a limiting support (2) for positioning and increasing strength compared with the tooth structure, and the arc-shaped portion and the tooth structure of the insulation plastic sheet (3) are designed as a plane on the side in contact with the core (4), and the edges of the arc-shaped portion and the tooth structure on the side not in contact with the core (4) are designed and processed as round corners (1).

4. The continuous wave winding copper wire multi-layer stack and insulation paper protection-free motor electromagnetic drive structure according to claim 1, characterized in that: the stator core (9) is made of a plurality of stator core punching sheets arranged in a radial direction and connected by a self-adhesive process; and the burrs of the stator core punching sheets on the outermost layer of the stator core (9) are arranged to face the inside of the axial direction.

5. The continuous wave winding copper wire multi-layer stack and insulation paper protection-free motor electromagnetic drive structure according to claim 1, characterized in that: the outer peripheral surface of the stator core (9) is provided with N stator slots at intervals in the circumferential direction, and each copper wire winding of the continuous wave winding copper wire group (4) is embedded into the stator slots from the outside to the inside; the continuous wave winding copper wire group (4) is divided into a plurality of copper wire windings, each copper wire winding is continuously wound in an S-shaped path with a period of two stator slots, and adjacent copper wire windings are wound in a staggered manner with a preset clock direction at intervals of k stator slots along the circumferential direction of the stator core (9).

6. The continuous wave winding copper wire multi-layer stack and insulation paper protection-free motor electromagnetic drive structure according to claim 5, characterized in that: the copper wire of the copper wire winding wound in the stator slot is arranged to be inclined to the main shaft of the motor; and the copper wire of the copper wire winding wound in the stator slot is arranged to be inclined to the tangential direction by an angle of 4.75°-5.3° on the basis of the original parallel to the axial direction.

2. A continuous wave copper wire wound multi-layer stack and no insulation paper shielded motor electromagnetic drive structure as claimed in claim 1, wherein: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The continuous wave copper wire multi-layer stacked and no insulation paper protection motor electromagnetic drive structure according to claim 5, characterized in that: The continuous wave copper wire group (4) includes four different lengths of copper wire windings, and the four different lengths of copper wire windings are used for winding in the continuous stator slots covering 1 / 4, 2 / 4, 3 / 4 and 4 / 4 of the entire circumference of the stator core (9) respectively. Or / and the continuous wave copper wire group (4) includes four different starting point copper wire windings, and the starting points of the four different starting point copper wire windings are respectively from the stator slots on the upper middle, left middle, lower middle and right middle of the stator core (9) to start winding. Or / and the continuous wave copper wire group (4) includes four different ending point copper wire windings, and the ending points of the four different ending point copper wire windings are respectively wound into the stator slots on the upper middle, left middle, lower middle and right middle of the stator core (9) to end.

8. The continuous wave copper wire multi-layer stacked and no insulation paper protection motor electromagnetic drive structure according to claim 5, characterized in that: The continuous wave copper wire group (4) includes seven different lengths and distribution positions of copper wire windings, each copper wire winding contains three copper wire windings, and a total of 21 copper wire windings. The first copper wire winding contains three copper wire windings covering 1 / 4 of the entire circumference of the stator core (9), and the starting points of the three copper wire windings are respectively from the three stator slots close to the upper middle of the stator core (9) to start winding, and the ending points are respectively wound into the three stator slots on the left middle of the stator core (9). The second copper wire winding contains three copper wire windings covering 2 / 4 of the entire circumference of the stator core (9), and the starting points of the three copper wire windings are respectively from the three stator slots on the upper middle of the stator core (9) to start winding, and the ending points are respectively wound into the three stator slots close to the lower middle of the stator core (9). The third copper wire winding contains three copper wire windings covering 3 / 4 of the entire circumference of the stator core (9), and the starting points of the three copper wire windings are respectively from the three stator slots close to the upper middle of the stator core (9) to start winding, and the ending points are respectively wound into the three stator slots on the right middle of the stator core (9). The fourth copper wire winding contains three copper wire windings covering 4 / 4 of the entire circumference of the stator core (9), and the starting points of the three copper wire windings are respectively from the three stator slots on the upper middle of the stator core (9) to start winding, and the ending points are respectively wound into the three stator slots close to the upper middle of the stator core (9). The fifth copper wire winding contains three copper wire windings covering 3 / 4 of the entire circumference of the stator core (9), and the starting points of the three copper wire windings are respectively from the three stator slots close to the left middle of the stator core (9) to start winding, and the ending points are respectively wound into the three stator slots on the upper middle of the stator core (9). The sixth copper wire winding includes three copper wire windings each covering a complete circumferential 2 / 4 stator slot of the stator core (9), and the starting first end of each of the three copper wire windings is wound from the three stator slots in the middle of the lower side of the stator core (9), and the ending last end is wound to the three stator slots in the middle of the upper side of the stator core (9). The seventh copper wire winding includes three copper wire windings each covering a complete circumferential 1 / 4 stator slot of the stator core (9), and the starting first end of each of the three copper wire windings is wound from the three stator slots in the middle of the right side of the stator core (9), and the ending last end is wound to the three stator slots in the middle of the upper side of the stator core (9).

9. The continuous wave copper wire multi-layer stacked and non-insulating paper protected motor electromagnetic drive structure according to claim 5, characterized in that: The 21 copper wire windings of the seven different lengths and different distribution positions include: On the left side of the stator core (9): the ending last end of the three copper wire windings of the first copper wire winding is connected to the starting first end of the three copper wire windings of the fifth copper wire winding; On the lower side of the stator core (9): the ending last end of the three copper wire windings of the second copper wire winding is connected to the starting first end of the three copper wire windings of the sixth copper wire winding; On the right side of the stator core (9): the ending last end of the three copper wire windings of the third copper wire winding is connected to the starting first end of the three copper wire windings of the seventh copper wire winding; On the upper side of the stator core (9): The starting first end of the first and last copper wire winding of the first copper wire winding is connected to the starting first end of the first and last copper wire winding of the third copper wire winding, the starting first end of the first and last copper wire winding of the fourth copper wire winding is connected to the starting first end of the first and last copper wire winding of the sixth copper wire winding, and the starting first end of the middle copper wire winding of the second and fourth copper wire windings and the ending last end of the middle copper wire winding of the fifth and seventh copper wire windings are connected together; The starting first end of the middle copper wire winding of the first copper wire winding, the starting first end of the middle copper wire winding of the third copper wire winding, the ending last end of the middle copper wire winding of the fourth copper wire winding, and the ending last end of the middle copper wire winding of the sixth copper wire winding are connected together to form the second phase of the three-phase line; the starting first end of the first copper wire winding of the second and fourth copper wire windings and the ending last end of the first copper wire winding of the fifth and seventh copper wire windings are connected together to form the third phase of the three-phase line; and the starting first end of the last copper wire winding of the second and fourth copper wire windings and the ending last end of the last copper wire winding of the fifth and seventh copper wire windings are connected together to form the first phase of the three-phase line.

10. The continuous wave copper wire multi-layer stacked and non-insulating paper protected motor electromagnetic drive structure according to claim 1, characterized in that: The rotor shell (1) is arranged at the outer periphery of the stator core (9), the rotor steel yoke (2) is fixedly installed at the inner periphery surface of the ring part of the rotor shell (1), the permanent magnet (3) is fixed at the inner periphery surface of the rotor steel yoke (2), and a gap exists between the permanent magnet (3) and the stator core (9).

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