High-efficiency conduction cooling and insulating structure of motor stator winding and manufacturing method of high-efficiency conduction cooling and insulating structure

Abstract

The invention discloses a high-efficiency conduction cooling and insulating structure of a motor stator winding and a manufacturing method thereof, belongs to the technical field of motor cooling, and aims to solve the problem of overhigh winding temperature rise caused by poor heat-conducting property of a traditional insulating material. The structure comprises heat conduction insulation sheets and a winding cooling module, a plurality of tooth portion iron cores are uniformly arranged on the inner circumference of an end ring iron core, flat wire windings are rectangular coils formed by winding single flat wires, each wire turn of each flat wire winding is clamped between two heat conduction insulation sheets, the plurality of flat wire windings sleeve the plurality of tooth portion iron cores in a one-to-one correspondence mode, and the winding cooling module is connected with the winding cooling module. The inner peripheries of the multiple heat conduction insulation sheets abut against the corresponding tooth part iron cores, the outer peripheries of the heat conduction insulation sheets abut against the two corresponding adjacent winding cooling modules, and cooling liquid is introduced into inner cavities of the multiple winding cooling modules. The problem that the winding temperature rise is too high due to the fact that a traditional insulating material is poor in heat conduction performance is effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of motor cooling technology, and particularly relates to a high-efficiency conductive cooling and insulation structure for motor stator windings and its manufacturing method. Background Technology

[0002] As drive motors develop towards higher performance, such as higher speed, higher efficiency, and higher power density, flat wire windings have attracted much attention due to their high slot fill factor, high efficiency, and high power density. However, this also places higher demands on the heat dissipation performance of motor windings. Currently, common winding cooling methods include end cooling and in-slot cooling. Combining these two methods can effectively improve the heat dissipation performance of the windings and increase the torque density and power density of the motor.

[0003] However, the insulation material inside the slots has poor thermal conductivity, making it difficult for current mainstream winding cooling solutions to overcome the heat dissipation performance bottleneck. CN112510879A discloses a water-cooled cooling system for the housing and winding ends, based on a modular winding end structure. It achieves overall efficient cooling of the motor structure by setting a cooling circuit outside the winding ends and connecting it to the housing cooling water circuit. However, this solution cannot address the high-temperature risk of conductors, especially near the slot openings, within the stator slots. Furthermore, the poor thermal conductivity of the insulation material on the winding surface further reduces the heat dissipation efficiency at the winding ends during end cooling. CN119945009A discloses a motor stator with in-slot oil cooling. By opening oil channels in the stator yoke, cooling oil can enter the stator slots through various oil holes, directly spraying it onto the windings within the stator slots, and finally axially spraying the end windings for cooling. This approach disrupts the stator structure, increases the difficulty of manufacturing, and further reduces the heat dissipation efficiency at the winding ends due to the poor thermal conductivity of the insulating material on the winding surface when cooling the windings.

[0004] Therefore, how to improve the cooling efficiency of flat wire windings is the technical problem that this application aims to solve. Summary of the Invention

[0005] This invention proposes a high-efficiency conductive cooling and insulation structure for motor stator windings and its manufacturing method, aiming to solve the problem of excessive winding temperature rise caused by the poor thermal conductivity of traditional insulation materials. By using insulating sheets with better thermal conductivity to insulate adjacent flat conductors, it can achieve effective insulation between adjacent layers of flat conductors and efficient conduction of heat accumulation in inner conductors. Combined with a winding cooling module, heat is quickly removed from the windings through heat conduction, improving winding cooling efficiency. The technical solution adopted in this invention is as follows:

[0006] An efficient conduction cooling and insulation structure for a motor stator winding, comprising a stator core, a plurality of flat wire windings, a plurality of heat-conducting insulation sheets, and a plurality of winding cooling modules. The stator core includes a plurality of tooth core parts and an end ring core. A plurality of tooth core parts are evenly arranged on the inner circumferential circle of the end ring core. The flat wire winding is a rectangular coil wound by a single flat wire. The heat-conducting insulation sheet is a rectangular open ring sheet. Each turn of the flat wire winding is clamped between two heat-conducting insulation sheets. The inner circumference of the heat-conducting insulation sheet protrudes from the inner circumference of the flat wire winding, and the outer circumference of the heat-conducting insulation sheet protrudes from the outer circumference of the flat wire winding. The winding cooling module is a "C"-shaped hollow member. The winding cooling module semi-surrounds the outer circumference of one long side and two short sides of the flat wire winding. A plurality of flat wire windings are sleeved on a plurality of tooth core parts one by one. The openings of a plurality of winding cooling modules are arranged in the same direction along the circumferential direction of the end ring core. The inner circumference of a plurality of heat-conducting insulation sheets abuts against the corresponding tooth core parts, and the outer circumference of the heat-conducting insulation sheet abuts against two adjacent winding cooling modules. The inner cavities of a plurality of winding cooling modules are connected in sequence through cooling pipes. A coolant inlet is provided on any one of the winding cooling modules, and a coolant outlet is provided on another adjacent winding cooling module.

[0007] Further, a plurality of燕尾槽 (swallowtail grooves) are evenly arranged on the inner circumferential circle of the end ring core. The swallotail grooves are axially penetrated along the end ring core. A swallotail-shaped protrusion is provided at the root of the tooth core part. The swallotail-shaped protrusion is adapted to the swallotail groove.

[0008] Further, the flat wire winding includes a plurality of主体部 (main body parts) and a plurality of连接段 (connection segments). The main body part is a rectangular open flat wire ring. The connection segment is an inclined flat wire segment. Define one end of the main body part as the starting end and the other end as the ending end. A plurality of main body parts are arranged in a spaced and stacked manner. Define the tooth root end of the tooth core part as the outside and the tooth head end of the tooth core part as the inside. Among two adjacent main body parts, the ending end of the main body part on the outer side is connected to the starting end of the main body part on the inner side through a connection segment. The starting end of the main body part on the outermost side is connected to the front lead-out wiring through a connection segment. The ending end of the main body part on the innermost side is connected to the rear lead-out wiring. The openings of a plurality of heat-conducting insulation sheets form a notch. A plurality of connection segments are located in the notch.

[0009] Further, the heat-conducting insulation sheet is a component made of alumina insulation material, aluminum nitride insulation material, or silicon nitride insulation material.

[0010] Further, the inner cavities of a plurality of winding cooling modules are connected in series or in parallel.

[0011] The present invention also provides a manufacturing method for an efficient conduction cooling and insulation structure of a motor stator winding. The cooling and insulation structure is the above-mentioned cooling and insulation structure, and includes the following steps:

[0012] Step 1: Design the shape and size of the flat wire winding according to the size of the tooth core part, and determine the thickness and number of layers of the flat wire for winding the flat wire winding.

[0013] Step 2: Insert thermally conductive insulating sheets between any two main body parts, and place thermally conductive insulating sheets on the other side of the two main body parts on the surface, so that each turn of the flat wire winding is sandwiched between two thermally conductive insulating sheets, and apply pressure to press the flat wire winding into close contact with several thermally conductive insulating sheets.

[0014] Step 3: Install a winding cooling module on the outside of the flat wire winding, so that the long side of one side and the short sides of both sides of the several spaced and stacked thermally conductive insulating sheets abut against the inner circumference of the winding cooling module.

[0015] Step 4: Connect the flat wire winding with the thermally conductive insulating sheet and winding cooling module to the toothed iron core;

[0016] Step 5: Secure the toothed iron core with the flat wire winding attached to the end ring iron core;

[0017] Step Six: Repeat the above steps to form a complete stator;

[0018] Step 7: Connect the inner cavities of several winding cooling modules sequentially using cooling pipes to form the cooling and insulation structure.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Efficient conduction cooling and insulation: By setting thermally conductive insulating sheets between adjacent turns of the flat wire winding, reliable inter-turn insulation is achieved. At the same time, the excellent thermal conductivity of the thermally conductive insulating sheets is used to quickly conduct the heat generated inside the flat wire winding to the refrigerant, which effectively solves the problem of excessive winding temperature rise caused by the poor thermal conductivity of traditional insulation materials.

[0021] 2. Reduce interlayer temperature difference and improve heat dissipation uniformity: Several thermally conductive insulating sheets are tightly attached to the turns of the flat wire winding. Combined with the arrangement of the winding cooling module, uniform heat dissipation from the inside to the outside is achieved, which significantly reduces the temperature difference between different turns of the flat wire winding and avoids local overheating.

[0022] 3. Enhanced overall heat dissipation capacity: The winding cooling module is in close contact with the thermally conductive insulation sheet, forming an efficient heat conduction path, which can quickly conduct heat out and carry it away through the coolant, greatly improving the overall cooling efficiency of the winding.

[0023] 4. Compact structure and easy assembly: The dovetail groove and dovetail protrusion are used to connect the toothed iron core and the end ring iron core, which simplifies the stator assembly process. At the same time, the modular design of the winding cooling module and the thermal insulation sheet facilitates installation and maintenance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cooling and insulation structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the end ring core structure;

[0026] Figure 3 This is a schematic diagram of the toothed iron core structure;

[0027] Figure 4 This is a schematic diagram of the stator core structure;

[0028] Figure 5 This is a schematic diagram of the structure of a flat wire winding;

[0029] Figure 6 It is a schematic diagram of several thermally conductive insulating sheets stacked in multiple layers;

[0030] Figure 7 It is a schematic diagram of the combination of flat wire winding and several thermally conductive insulating sheets;

[0031] Figure 8 This is a structural schematic diagram of the winding cooling module;

[0032] Figure 9 This is a cross-sectional view of the end of the winding cooling module;

[0033] Figure 10 It is a schematic diagram of the combination of flat wire winding, several thermally conductive insulating sheets and winding cooling module;

[0034] Figure 11 This is a schematic diagram of the connection structure between two adjacent winding cooling modules;

[0035] Figure 12 It is a schematic diagram of the fit between the toothed iron core and the end ring iron core, which are fitted with flat wire windings and winding cooling modules.

[0036] Figure 13 It is a cross-sectional schematic diagram of the front end of the flat wire winding combined with the winding cooling module;

[0037] Figure 14 It is a cross-sectional schematic diagram of the rear end of the flat wire winding combined with the winding cooling module.

[0038] In the diagram, 1-end ring core, 11-dovetail groove, 2-toothed core, 21-dovetail protrusion, 3-flat wire winding, 31-connecting section, 32-front lead-out wire, 33-rear lead-out wire, 34-main body, 4-thermal conductive insulating sheet, 41-slot, 5-winding cooling module, 51-coolant inlet, 52-coolant outlet, 53-cooling pipe, 54-inner cavity. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and do not limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0040] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection is an inseparable connection, including but not limited to conventional fixed connection methods such as hemming connection, riveting connection, bonding connection, and welding connection. The detachable connection includes but not limited to conventional disassembly methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly defined, it is default that at least one connection method can be found among the existing connection methods to achieve this function, and those skilled in the art can choose according to their needs. For example: welding connection is selected for the fixed connection, and bolt connection is selected for the detachable connection.

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings. The following embodiments are explanations of the present invention, and the present invention is not limited to the following embodiments.

[0042] Embodiment 1: As Figures 1 to 14 shown, a high-efficiency conduction cooling and insulation structure for a motor stator winding includes a stator core, a plurality of flat wire windings 3, a plurality of heat-conducting insulating sheets 4, and a plurality of winding cooling modules 5. The stator core includes a plurality of tooth core parts 2 and an end ring core 1. A plurality of tooth core parts 2 are uniformly arranged on the inner circumference of the end ring core 1. The flat wire winding 3 is a rectangular coil wound by a single flat wire. The heat-conducting insulating sheet 4 is a rectangular open-ring sheet. Each turn of the flat wire winding 3 is sandwiched between two heat-conducting insulating sheets 4. With such a setting, the contact gap can be reduced, which is beneficial to improving the heat conduction efficiency and achieving mutual insulation between turns of the flat wire winding 3. The inner circumference of the heat-conducting insulating sheet 4 protrudes from the inner circumference of the flat wire winding 3, and the outer circumference of the heat-conducting insulating sheet 4 protrudes from the outer circumference of the flat wire winding 3. The winding cooling module 5 is a "C"-shaped hollow member. The winding cooling module 5 semi-surrounds the outer circumference of one long side and two short sides of the flat wire winding 3. A plurality of flat wire windings 3 are sleeved on a plurality of tooth core parts 2 in one-to-one correspondence. The long side of the flat wire winding 3 is located in the tooth slot formed between two adjacent tooth core parts 2. The openings of a plurality of winding cooling modules 5 are arranged in the same direction along the circumference of the end ring core 1. The inner circumference of a plurality of heat-conducting insulating sheets 4 abuts against the corresponding tooth core parts 2, and the outer circumference of the heat-conducting insulating sheet 4 abuts against two adjacent winding cooling modules 5, realizing efficient conduction cooling from the flat wire winding 3 to the heat-conducting insulating sheet 4 and then to the winding cooling module 5. The inner cavities 54 of a plurality of winding cooling modules 5 are connected in sequence through cooling pipes 53. A coolant inlet 51 is provided on any one of the winding cooling modules 5, and a coolant outlet 52 is provided on another adjacent winding cooling module 5.

[0043] The inner circumference of the end ring core 1 is uniformly provided with several dovetail grooves 11, which are opened through the axial direction of the end ring core 1. The root of the toothed core 2 is provided with a dovetail protrusion 21, which is adapted to the dovetail groove 11. Several toothed cores 2 can be detachably fixed to the inner circumference of the end ring core 1 through the cooperation of the dovetail protrusion 21 and the corresponding dovetail groove 11, simplifying the assembly process.

[0044] The flat wire winding 3 includes several main body sections 34 and several connecting sections 31. The main body section 34 is a rectangular open flat wire loop, and the connecting section 31 is an inclined flat wire segment. One end of the main body section 34 is defined as the starting end, and the other end as the stopping end. The main body sections 34 are stacked at intervals. The root end of the tooth of the tooth core 2 is defined as the outside, and the tip end of the tooth of the tooth core 2 is defined as the inside. In two adjacent main body sections 34, the stopping end of the outer main body section 34 is connected to the starting end of the inner main body section 34 through a connecting section 31. The starting end of the outermost main body section 34 is connected to the front lead-out terminal 32 through a connecting section 31, and the stopping end of the innermost main body section 34 is connected to the rear lead-out terminal 32. When the flat wire winding 3 is connected by the wiring 33 and the flat wire winding 3 is combined with several thermally conductive insulating sheets 4, the thermally conductive insulating sheets 4 are stacked at intervals, and the openings of the thermally conductive insulating sheets 4 are combined to form a slot 41. Several connecting sections 31 are located in the slot 41. In this way, the flat wire winding 3 can form a helically wound rectangular coil, and each main body 34 can be in the shape of a flat open ring. It is not necessary to set the main body 34 into a shape with a helical angle, which facilitates the processing of the flat wire winding 3 and facilitates the close contact and bonding of the wire turns with the corresponding thermally conductive insulating sheets 4. This achieves mutual insulation between the wire turns and provides a larger contact area, realizing the efficient conduction of heat generated by the flat wire winding 3.

[0045] The thermally conductive insulating sheet 4 is a component made of alumina insulating material, aluminum nitride insulating material, or silicon nitride insulating material, which is resistant to high temperature and has good thermal conductivity, and is used to efficiently conduct heat.

[0046] The inner cavities 54 of several winding cooling modules 5 are connected in series or in parallel.

[0047] like Figure 11 As shown, a winding cooling module 5 is installed axially on the outside of the flat wire winding 3. The winding cooling module 5 partially surrounds the outside of one long side and two short sides of the flat wire winding 3. The thermally conductive insulating sheets 4 are adjusted so that several spaced-overlapping thermally conductive insulating sheets 4 are in close contact with the inner three sides of the winding cooling module 5. This allows the interlayer heat inside the flat wire winding 3 to be conducted to the winding cooling module 5 through several thermally conductive insulating sheets 4, increasing the heat transfer contact area and improving the heat transfer efficiency.

[0048] By installing several winding cooling modules 5 with their openings in the same direction along the circumference of the end ring core 1, the connected winding cooling modules 5 can surround the other long side of the flat wire winding 3, and ensure that the other long side of several spaced-apart thermally conductive insulating sheets 4 is in close contact with the adjacent winding cooling modules 5, as shown in the structure. Figure 11 As shown, a modular structure is formed by sequentially installing all the thermally conductive insulating sheets 4, flat wire windings 3, toothed cores 2, and winding cooling modules 5 along the circumference of the end ring core 1. After assembly, it forms a modular structure as shown. Figure 14 The diagram shows a high-efficiency conductive cooling and insulation structure for the motor stator windings.

[0049] Coolant flows into one end of the winding cooling module 5, absorbs the conductive heat of the flat wire winding 3, and then flows out from the other end of the winding cooling module 5. Several winding cooling modules 5 are connected by cooling pipes 53. Specifically, the coolant inlet 51 and the coolant outlet 52 are both connected to the coolant storage tank. The coolant can flow into several winding cooling modules 5 from the coolant inlet 51 and then flow back to the coolant storage tank from the coolant outlet 52, forming a circulating conductive cooling system.

[0050] The advantages of this invention are:

[0051] 1. Efficient conduction cooling and insulation: By setting thermally conductive insulating sheets 4 between adjacent turns of the flat wire winding 3, reliable inter-turn insulation is achieved. At the same time, the excellent thermal conductivity of the thermally conductive insulating sheets 4 is used to quickly conduct the heat generated inside the flat wire winding 3 to the refrigerant, which effectively solves the problem of excessive winding temperature rise caused by the poor thermal conductivity of traditional insulation materials.

[0052] 2. Reduce interlayer temperature difference and improve heat dissipation uniformity: Several thermally conductive insulating sheets 4 are tightly attached to the turns of the flat wire winding 3. Combined with the arrangement of the winding cooling module 5, uniform heat dissipation from the inside to the outside is achieved, which significantly reduces the temperature difference between different turns of the flat wire winding 3 and avoids local overheating.

[0053] 3. Enhanced overall heat dissipation capacity: The winding cooling module 5 is in close contact with the thermally conductive insulating sheet 4, forming an efficient heat conduction path, which can quickly conduct heat out and carry it away through the coolant, greatly improving the overall cooling efficiency of the winding.

[0054] 4. Compact structure and easy assembly: The dovetail groove 11 and the dovetail protrusion 21 are used to connect the toothed iron core 2 and the end ring iron core 1, which simplifies the stator assembly process. At the same time, the modular design of the winding cooling module 5 and the thermally conductive insulating sheet 4 facilitates installation and maintenance.

[0055] Example 2: Figures 1 to 14 As shown, a method for manufacturing a high-efficiency conductive cooling and insulation structure for motor stator windings, wherein the cooling and insulation structure is the same as that described in Example 1, includes the following steps:

[0056] Step 1: Design the shape and size of the flat wire winding 3 according to the size of the toothed iron core 2, and determine the thickness and number of layers of the flat wire for winding the flat wire winding 3;

[0057] Step 2: Insert thermally conductive insulating sheets 4 between any two main body parts 34, and set thermally conductive insulating sheets 4 on the other side of the two main body parts 34 on the surface, so that each turn of the flat wire winding 3 is sandwiched between two thermally conductive insulating sheets 4. Apply pressure to press the flat wire winding 3 into close contact with several thermally conductive insulating sheets 4. At the same time, open notches on the two thermally conductive insulating sheets 4 on the surface to expose the rear lead wire 33 and the front lead wire 32 for subsequent wiring.

[0058] Step 3: Install the winding cooling module 5 on the outside of the flat wire winding 3, so that the long side of one side and the short sides of both sides of the several spaced and stacked thermally conductive insulating sheets 4 abut against the inner circumference of the winding cooling module 5.

[0059] Step 4: Connect the flat wire winding 3, which is equipped with the thermally conductive insulating sheet 4 and the winding cooling module 5, to the toothed iron core 2.

[0060] Step 5: Fix the toothed iron core 2 with the flat wire winding 3 attached to it to the end ring iron core 1.

[0061] Step Six: Repeat the above steps to form a complete stator;

[0062] Step 7: Connect the inner cavities 54 of several winding cooling modules 5 sequentially using cooling pipes 53 to form the cooling and insulation structure.

[0063] The above embodiments are merely illustrative examples of the present invention and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A high efficiency conduction cooling and insulation structure for a motor stator winding, characterized by, The stator core, a plurality of flat wire windings (3), a plurality of heat-conducting insulation sheets (4), and a plurality of winding cooling modules (5) are included. The stator core includes a plurality of tooth core (2) and end ring core (1), the inner circumference of the end ring core (1) is uniformly provided with a plurality of tooth core (2), the flat wire winding (3) is a rectangular coil wound by a single flat wire, the heat-conducting insulation sheet (4) is a rectangular open ring sheet, each turn of the flat wire winding (3) is clamped between two heat-conducting insulation sheets (4), the inner circumference of the heat-conducting insulation sheet (4) protrudes from the inner circumference of the flat wire winding (3), the outer circumference of the heat-conducting insulation sheet (4) protrudes from the outer circumference of the flat wire winding (3), the winding cooling module (5) is a hollow member in the shape of a Chinese character "fang", the winding cooling module (5) is semi-enclosed on one side of the flat wire winding (3) and the outer circumference of the two sides, a plurality of flat wire windings (3) are correspondingly arranged on a plurality of tooth core (2), the openings of a plurality of winding cooling modules (5) are arranged in the same direction along the circumference of the end ring core (1), the inner circumference of the heat-conducting insulation sheet (4) abuts against the corresponding tooth core (2), the outer circumference of the heat-conducting insulation sheet (4) abuts against the corresponding two adjacent winding cooling modules (5), the inner cavities (54) of a plurality of winding cooling modules (5) are connected in series or in parallel through cooling pipes (53), any winding cooling module (5) is provided with a cooling liquid inlet (51), and the other adjacent winding cooling module (5) is provided with a cooling liquid outlet (52).

2. A high efficient conduction cooling and insulation structure for stator winding of an electrical machine as claimed in claim 1, wherein, The inner circumference of the end ring core (1) is uniformly provided with a plurality of dovetail grooves (11), the dovetail grooves (11) are through-opened along the axial direction of the end ring core (1), the root of the tooth core (2) is provided with a dovetail-shaped protrusion (21), and the dovetail-shaped protrusion (21) is matched with the dovetail groove (11).

3. A high efficient conduction cooling and insulation structure for motor stator winding as claimed in claim 2 wherein, The flat wire winding (3) includes a plurality of main body parts (34) and a plurality of connecting sections (31), the main body part (34) is a rectangular open flat wire ring, the connecting section (31) is an inclined flat wire section, one end of the main body part (34) is defined as a starting end, and the other end is defined as a terminal end, a plurality of main body parts (34) are arranged in layers, one end of the tooth root of the tooth core (2) is defined as an outer end, and the other end of the tooth head of the tooth core (2) is defined as an inner end, among the adjacent two main body parts (34), the terminal end of the main body part (34) on the outer side is connected to the starting end of the main body part (34) on the inner side through a connecting section (31), the starting end of the main body part (34) on the outermost side is connected to the front lead-out wire (32) through a connecting section (31), and the terminal end of the main body part (34) on the innermost side is connected to the rear lead-out wire (33), the openings of a plurality of heat-conducting insulation sheets (4) are combined to form a slot (41), and a plurality of connecting sections (31) are located in the slot (41).

4. A high efficient conduction cooling and insulation structure for stator windings of an electrical machine according to claim 3, characterized in that, The heat-conducting insulation sheet (4) is an aluminum oxide insulation material member, an aluminum nitride insulation material member, or a silicon nitride insulation material member.

5. A high efficient conduction cooling and insulation structure for stator windings of an electrical machine according to claim 3, characterized in that, The inner cavities (54) of a plurality of winding cooling modules (5) are connected in series or in parallel.

6. A method of manufacturing a high efficient conduction cooling and insulation structure for a motor stator winding, said cooling and insulation structure being the cooling and insulation structure according to any one of claims 3-5, characterized in that, The method comprises the following steps: Step one: design the shape and size of the flat wire winding (3) according to the size of the tooth core (2), and determine the thickness and number of layers of the flat wire winding (3); Step two: insert the heat-conducting insulation sheet (4) between any two main body parts (34), and set the heat-conducting insulation sheet (4) on the other side of the surface of the two main body parts (34), so that each turn of the flat wire winding (3) is clamped between two heat-conducting insulation sheets (4), and the flat wire winding (3) is pressed into contact with the heat-conducting insulation sheets (4); Step three: install the winding cooling module (5) outside the flat wire winding (3), so that one side of the long edge and the two sides of the short edge of the heat-conducting insulation sheet (4) are in contact with the inner wall of the winding cooling module (5); Step four: wrap the flat wire winding (3) with the heat-conducting insulation sheet (4) and the winding cooling module (5) on the tooth core (2); Step five: fix the tooth core (2) with the flat wire winding (3) and the end ring core (1); Step six: repeat the above steps to form a complete stator; Step seven: connect the inner cavities (54) of the winding cooling modules (5) in sequence by using the cooling pipe (53) to form the cooling and insulation structure.

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