A wound motor stator core and a manufacturing method thereof

Abstract

The application discloses a kind of winding motor stator core and its manufacturing method, including soft magnetic strip material, multiple linear array installation tooth grooves are set on the soft magnetic strip material, the soft magnetic strip material is formed by spiral winding equipment outside stator core body, installation tooth groove after spiral winding is located in the inner circle of stator core body and is longitudinally arranged, and installation tooth groove after winding forms the gradually changing profile of inner circle narrow, outer circle wide, the inner wall annular array of installation tooth groove of the stator core body inner circle has first coil and second coil, and first coil and second coil are placed alternately, its manufacturing method includes four steps of spiral winding soft magnetic strip material, installation insulation material, form heat dissipation channel and heat-conducting embedded structure, the present application realizes magnetic flux density step-by-step homogenization by installation tooth groove gradually changing profile, by multilayer three-dimensional heat dissipation architecture, it is greatly shortened to heat conduction path, and simultaneously improve material utilization and production efficiency.

Description

Technical Field

[0001] This invention relates to the field of motor stator core technology, specifically to a wound motor stator core and its manufacturing method. Background Technology

[0002] The stator core of an electric motor is a crucial component of all types of motors. Its performance directly affects the motor's efficiency, power density, and operational reliability, and it also constitutes a major part of the motor's cost. With the rapid development of various industries, the demand for motors is increasing daily, placing higher demands on the processing efficiency, material utilization rate, and product quality of stator cores. The traditional method for manufacturing motor stator cores involves stamping silicon steel sheets into stator laminations, followed by manual stacking, pressing, and welding to form the stator core. This stamping process generates a large amount of scrap material, resulting in extremely low material utilization. Specifically, without considering the recycling of scrap material, the material utilization rate of the traditional processing method is only around 20%. Compared to the traditional lamination stacking process, the winding process represents a significant breakthrough in reducing material consumption and improving processing efficiency. Using the winding process to manufacture stator cores can increase material utilization by more than two times, while also offering better production continuity, higher dimensional accuracy, and more stable quality. Therefore, winding stator core manufacturing technology has become an important development direction in the field of motor core processing.

[0003] The existing Chinese patent with publication number CN121906833A is formed by winding at least one layer of soft magnetic material strip multiple times. Before winding, a number of patterns are pre-made at the position where the tooth groove is formed. After winding, the number of patterns together form a preset three-dimensional geometric structure on the stator teeth or stator yoke of the stator core of the wound motor.

[0004] When the above-mentioned device is used, it ensures that the different three-dimensional geometric structures of the stator core of the wound motor can be manufactured accurately and efficiently. However, in actual use, the wound stator core adopts the same width tooth groove structure, which can easily lead to uneven magnetic flux distribution or local magnetic saturation.

[0005] Therefore, we propose a wound motor stator core and its manufacturing method. Summary of the Invention

[0006] The purpose of this invention is to provide a wound motor stator core and its manufacturing method, which has the advantage of manufacturing a gradual profile of the tooth groove, so that the magnetic flux density is gradually uniform from the tooth part to the yoke part, thus solving the problems in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wound motor stator core and its manufacturing method, comprising a soft magnetic tape, wherein the soft magnetic tape has a plurality of linear array mounting slots, the soft magnetic tape is spirally wound into a stator core body by an external winding device, and the spirally wound mounting slots are located in the inner ring of the stator core body and arranged longitudinally, the inner wall of the mounting slots in the inner ring of the stator core body has a first coil arranged in a ring array, and the inner wall of the mounting slots has a second coil arranged in a ring array interleaved with insulating paper, and the inner wall of the mounting slots is provided with an insulating mechanism for insulating the first coil and the second coil from the stator core body.

[0008] Preferably, the insulation mechanism includes insulating paper provided on the inner wall of each of the mounting slots to prevent short circuits between the first coil and the second coil and the stator core body, and each of the insulating papers is respectively fitted onto the outer contour of the first coil and the second coil on the inner wall of the mounting slot at the corresponding position.

[0009] Preferably, each of the mounting slots is provided with a first insulating pad for insulating and supporting the first coil and the second coil on the inner wall at one end near the outside of the stator core body, and a second insulating pad for sealing the port at one end of each mounting slot near the inside of the stator core body.

[0010] Preferably, the soft magnetic tape has a plurality of linear arrays of heat dissipation holes, which are arranged in a ring on the spirally wound stator core body and are spirally stacked and connected on the stator core body.

[0011] Preferably, the soft magnetic tape has a plurality of linear array mounting holes, which are arranged in a ring on the spirally wound stator core body and are spirally stacked and connected on the stator core body. The stator core body is provided with a heat dissipation mechanism for rapid conduction and dissipation of heat accumulated inside.

[0012] Preferably, the heat dissipation mechanism includes heat dissipation copper rings at both ends of the stator core body for conducting heat dissipation inside the stator core body. Each of the two heat dissipation copper rings has multiple annular arrays of connecting slots and connecting holes. The connecting slots are respectively located in corresponding positions to the heat dissipation holes, and the connecting holes are respectively located in corresponding positions to the mounting holes.

[0013] Preferably, the inner wall of each pair of adjacent connecting holes and mounting holes is provided with a heat-conducting copper rod that conducts heat from inside the stator core body to the heat dissipation copper ring. Each heat-conducting copper rod has a threaded groove on its outer contour at both ends, and a fixing nut that fixes the heat dissipation copper ring to both ends of the stator core body is screwed and fixedly connected to the threaded groove at both ends of each heat-conducting copper rod.

[0014] The present invention also provides a method for manufacturing a wound motor stator core, which includes the following steps: S1. Spiral wound soft magnetic tape material: The mounting grooves on the soft magnetic tape material are spirally wound and stacked to a set number of turns by an external winding device to form a complete stator core body. S2. Install insulation material: Place the insulating paper on the outer contour of the first coil and the second coil on the inner wall of the mounting tooth groove, and support the first and second insulating pads at both ends of the inner wall of the mounting tooth groove to ensure the stability of the first coil and the second coil on the inner wall of the mounting tooth groove. At the same time, the second insulating pad can seal the opening on the inner side of the mounting tooth groove. S3, Heat dissipation channel: Through the heat dissipation holes and mounting holes opened on the soft magnetic tape material, the soft magnetic tape material is spirally wound into the stator core body, so that the heat dissipation holes and mounting holes can be arranged in a ring array on the stator core body respectively, and the heat dissipation holes and mounting holes wound and stacked on the stator core body are arranged longitudinally and connected, so the heat generated inside the stator core body can be directly dissipated through the heat dissipation holes, shortening the heat conduction path. S4. Thermally Conductive Embedded Structure: The thermally conductive copper rod is embedded in the mounting hole on the inner wall of the stator core body. The thermally conductive copper rod is made of copper material with high thermal conductivity. The thermally conductive copper rod can use the high thermal conductivity of copper to quickly conduct heat from the inside of the stator core body to the heat dissipation copper rings at both ends. The heat dissipation copper rings are fixed to the inner wall of the motor housing. In this way, the heat dissipation copper rings can conduct heat to the motor housing, thereby improving the heat dissipation efficiency of the stator core body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: I. By employing multiple linear array mounting slots on the soft magnetic material and spirally winding it using an external winding device, the spirally wound mounting slots are located in the inner circle of the stator core body and arranged longitudinally. The wound mounting slots form a gradually increasing profile with a narrow inner circle and a wide outer circle, achieving a gradual increase in cross-sectional area from the tooth section to the yoke section. This results in a gradual and uniform transition of magnetic flux density from the tooth section to the yoke section, effectively avoiding the local magnetic saturation phenomenon caused by the sudden concentration of magnetic flux in the yoke section in traditional equal-width slot structures. This significantly reduces the hysteresis loss and eddy current loss of the stator core. Simultaneously, the uniform magnetic flux distribution can correct the stator air gap magnetic field waveform, weaken higher harmonic components, and make the magnetic field distribution closer to a sine wave, thereby reducing torque pulsation and electromagnetic noise during motor operation and improving the overall operational stability and efficiency of the motor.

[0016] Second, by opening multiple linear arrays of heat dissipation holes and mounting holes on the soft magnetic tape material, and then spirally winding the soft magnetic tape material into the stator core body, the heat dissipation holes and mounting holes form a ring array on the stator core body. The heat dissipation holes and mounting holes after winding and stacking are arranged longitudinally and connected to each other, so that the heat generated inside the stator core body can be directly dissipated to the outside through the heat dissipation holes, which greatly shortens the heat conduction path.

[0017] Third, by embedding high thermal conductivity copper rods in the mounting holes and setting heat dissipation copper rings at both ends of the stator core body, the high thermal conductivity of copper allows the heat to be quickly conducted from the inside of the stator core body to the heat dissipation copper rings at both ends. The heat dissipation copper rings are fixed to the inner wall of the motor housing, thereby efficiently conducting the heat to the motor housing. This forms a multi-layer three-dimensional heat dissipation architecture consisting of internal heat dissipation hole convection heat dissipation + copper rod axial heat conduction + copper ring coupling housing heat dissipation. This significantly reduces the temperature rise of the stator core, extends the service life of the motor, and improves the operational reliability of the motor under high load conditions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the three-dimensional structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the stator core location of the present invention; Figure 4 For the present invention Figure 1 Schematic diagram of the structure at point A in the middle; Figure 5 For the present invention Figure 3 Schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the three-dimensional structure of the stator core of the present invention. Figure 7 This is an exploded three-dimensional structural diagram of the part where the fixing nut is located in this invention; Figure 8 This is a schematic flowchart of a method for manufacturing a wound motor stator core according to the present invention. Figure 9 This is a diagram illustrating the magnetic flux density effect of the stator core of this invention.

[0019] In the diagram: 1. Stator core body; 111. Soft magnetic tape material; 101. Mounting slot; 102. Heat dissipation hole; 103. Mounting hole; 2. First insulating pad; 3. Insulating paper; 4. Second insulating pad; 5. First coil; 6. Second coil; 7. Heat-conducting copper rod; 701. Threaded groove; 8. Fixing nut; 9. Heat dissipation copper ring; 901. Connecting groove; 902. Connecting hole. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1:

[0022] Please see Figures 1 to 9 This invention provides a technical solution: a wound motor stator core and its manufacturing method, comprising a soft magnetic tape 111, wherein the soft magnetic tape 111 is provided with a plurality of linear array mounting slots 101, the soft magnetic tape 111 is a stator core body 1 formed by spiral winding of the soft magnetic tape 111 by an external winding device, and the spirally wound mounting slots 101 are located in the inner circle of the stator core body 1 and arranged longitudinally, the inner wall of the mounting slots 101 in the inner circle of the stator core body 1 has a first coil 5 arranged in a ring array, and the inner wall of the mounting slots 101 has a second coil 6 arranged in a ring array interleaved with insulating paper 3, and the inner wall of the mounting slots 101 is provided with an insulating mechanism for insulating the first coil 5 and the second coil 6 from the stator core body 1.

[0023] In use, by setting the stator core body 1 and the mounting slots 101 opened on the stator core body 1, the mounting slots 101 can be linearly arrayed on the soft magnetic tape material 111. First, the mounting slots 101 on the soft magnetic tape material 111 are spirally wound and stacked inward to a set number of turns by an external winding device to form a complete stator core body 1. At the same time, the mounting slots 101 on the stator core body 1 are arranged longitudinally and are in a connected state. The wound mounting slots 101 form a gradient profile with a narrow inner circle and a wide outer circle. By changing the profile of the mounting slots 101, the magnetic flux density of the stator core body 1 is improved and made more uniform from the tooth part to the yoke part. This avoids the problem of uneven magnetic flux distribution and local magnetic saturation caused by the traditional stator core body 1 using a toothed slot structure with equal width.

[0024] By installing the first coil 5 and the second coil 6 on the mounting slot 101, and by having the first coil 5 and the second coil 6 be stacked alternately on the inner wall of the mounting slot 101, the arrangement density of the first coil 5 and the second coil 6 is optimized, which can improve the slot fill factor of the mounting slot 101. Thus, the winding structure of the first coil 5 and the second coil 6 being arranged alternately can correct the stator air gap magnetic field waveform, weaken the higher harmonic components, make the magnetic field distribution closer to the sine wave, and reduce torque pulsation and electromagnetic noise.

[0025] By installing the insulation mechanism on the toothed slot 101, the insulation mechanism can insulate the first coil 5 and the second coil 6 from the stator core body 1, thereby preventing short circuits between the first coil 5 and the second coil 6 and the stator core body 1, and improving the overall working performance and stability of the motor.

[0026] Example 2:

[0027] Building upon Example 1, the following is a further step: The insulation mechanism includes insulating paper 3 provided on the inner wall of each mounting slot 101 to prevent short circuit between the first coil 5 and the second coil 6 and the stator core body 1. Each insulating paper 3 is respectively fitted on the outer contour of the first coil 5 and the second coil 6 on the inner wall of the mounting slot 101 at the corresponding position.

[0028] Each of the mounting slots 101 has a first insulating pad 2 at one end near the outside of the stator core body 1 to provide insulating support for the first coil 5 and the second coil 6 on the inner wall, and a second insulating pad 4 at one end near the inside of the stator core body 1 to seal the port.

[0029] In use, the insulating paper 3 is placed on the inner wall of the mounting tooth groove 101, so that the insulating paper 3 can be fitted onto the outer contour of the first coil 5 and the second coil 6 on the inner wall of the mounting tooth groove 101. The first insulating pad 2 and the second insulating pad 4 are respectively installed on the inner walls at both ends of the mounting tooth groove 101. The first insulating pad 2 and the second insulating pad 4 can support the first coil 5 and the second coil 6 inside the mounting tooth groove 101, ensuring the stability of the first coil 5 and the second coil 6 on the inner wall of the mounting tooth groove 101. At the same time, the second insulating pad 4 can seal the opening on the inner side of the mounting tooth groove 101, ensuring the overall working performance of the stator core body 1.

[0030] Example 3:

[0031] Building upon Example 2, the following is a further step: The soft magnetic tape material 111 has a plurality of linear array heat dissipation holes 102. The heat dissipation holes 102 are arranged in a ring on the spirally wound stator core body 1, and the heat dissipation holes 102 are spirally stacked and connected on the stator core body 1.

[0032] The soft magnetic tape material 111 has a plurality of linear array mounting holes 103. The mounting holes 103 are arranged in a ring on the spirally wound stator core body 1, and the mounting holes 103 are spirally stacked and connected on the stator core body 1. The stator core body 1 is provided with a heat dissipation mechanism for rapid conduction and dissipation of heat accumulated inside.

[0033] In use, the heat dissipation holes 102 and mounting holes 103 on the soft magnetic tape material 111 can be linearly arrayed on the stator core body 1. As the soft magnetic tape material 111 is spirally wound onto the stator core body 1, the heat dissipation holes 102 and mounting holes 103 can be arranged in a ring on the stator core body 1. The heat dissipation holes 102 and mounting holes 103 wound and stacked on the stator core body 1 are arranged longitudinally and connected. Thus, the heat generated inside the stator core body 1 can be directly dissipated through the heat dissipation holes 102, shortening the heat conduction path and improving the heat dissipation effect of the stator core body 1 in actual use.

[0034] The heat dissipation mechanism provided on the stator core body 1 enables the heat generated inside the stator core body 1 to be quickly conducted to the motor housing, thereby further improving the heat dissipation efficiency of the stator core body 1 during operation.

[0035] Example 4:

[0036] Building upon Example 3, the following is a further step: The heat dissipation mechanism includes heat dissipation copper rings 9 at both ends of the stator core body 1, which conduct heat away from the interior of the stator core body 1. Each of the two heat dissipation copper rings 9 has multiple annular arrays of connecting slots 901 and connecting holes 902. The connecting slots 901 are respectively located at corresponding positions to the heat dissipation holes 102, and the connecting holes 902 are respectively located at corresponding positions to the mounting holes 103.

[0037] Each pair of adjacent connecting holes 902 and mounting holes 103 are provided with heat-conducting copper rods 7 that conduct heat from the inside of the stator core body 1 to the heat dissipation copper rings 9. Each heat-conducting copper rod 7 has a threaded groove 701 on its outer contour at both ends. Each heat-conducting copper rod 7 has a fixing nut 8 that is screwed and fixed to the heat dissipation copper rings 9 at both ends of the stator core body 1.

[0038] In use, the heat dissipation copper ring 9 is provided on the stator core body 1, and the connecting groove 901 and connecting hole 902 on the heat dissipation copper ring 9 are positioned corresponding to the heat dissipation hole 102 and mounting hole 103 on the stator core body 1. This allows the connecting groove 901 and connecting hole 902 to communicate with the corresponding heat dissipation hole 102 and mounting hole 103. The heat-conducting copper rod 7 provided on the connecting hole 902 and mounting hole 103 is first inserted into the corresponding connecting hole. The inner walls of the holes 902 and 103 are connected by a threaded groove 701 on the heat-conducting copper rod 7, and a fixing nut 8 is provided on the heat-conducting copper rod 7. The fixing nut 8 is screwed onto the threaded groove 701, so that the fixing nut 8 can fix the heat dissipation copper ring 9 to both ends of the stator core body 1. The heat dissipation copper ring 9 can support the spirally wound stator core body 1, ensuring the tightness between the layers of the soft magnetic tape material 111, and avoiding the formation of seams between the layers of the soft magnetic tape material 111, which would cause magnetic flux density distortion and additional iron loss at the seams.

[0039] Furthermore, the heat-conducting copper rod 7 is made of copper with high thermal conductivity. Simultaneously, the heat-conducting copper rod 7 is embedded in the mounting hole 103 on the inner wall of the stator core body 1. The heat-conducting copper rod 7 can utilize the high thermal conductivity of copper to quickly conduct heat from the inside of the stator core body 1 to the heat dissipation copper rings 9 at both ends. The heat dissipation copper rings 9 are fixed to the inner wall of the motor housing, thereby conducting heat to the motor housing and improving the heat dissipation efficiency of the stator core body 1.

[0040] Example 5:

[0041] This invention provides a method for manufacturing a wound motor stator core, which can be applied to the wound motor stator core described in the above embodiments, as shown in the attached figure. Figure 8 As shown, the manufacturing method includes the following steps: S1, Spiral winding of soft magnetic tape material 111: The mounting grooves 101 on the soft magnetic tape material 111 are spirally wound and stacked to a set number of turns by an external winding device to form a complete stator core body 1. S2. Install insulation material: Place the insulating paper 3 on the outer contour of the first coil 5 and the second coil 6 on the inner wall of the mounting tooth groove 101, and support the first insulating pad 2 and the second insulating pad 4 on both ends of the inner wall of the mounting tooth groove 101 to ensure the stability of the first coil 5 and the second coil 6 on the inner wall of the mounting tooth groove 101. At the same time, the second insulating pad 4 can seal the opening on the inner side of the mounting tooth groove 101. S3, Heat dissipation channel: Through the heat dissipation holes 102 and mounting holes 103 opened on the soft magnetic tape material 111, as the soft magnetic tape material 111 is spirally wound and formed to the stator core body 1, the heat dissipation holes 102 and mounting holes 103 can be arranged in a ring array on the stator core body 1 respectively, and the heat dissipation holes 102 and mounting holes 103 wound and stacked on the stator core body 1 are arranged longitudinally and connected, so the heat generated inside the stator core body 1 can be directly dissipated through the heat dissipation holes 102, shortening the heat conduction path; S4. Thermally Conductive Embedded Structure: The thermally conductive copper rod 7 is embedded in the mounting hole 103 on the inner wall of the stator core body 1. The thermally conductive copper rod 7 is made of copper with high thermal conductivity. The thermally conductive copper rod 7 can use the high thermal conductivity of copper to quickly conduct heat from the inside of the stator core body 1 to the heat dissipation copper rings 9 at both ends. The heat dissipation copper rings 9 are fixed to the inner wall of the motor housing. Thus, the heat dissipation copper rings 9 can conduct heat to the motor housing, improving the heat dissipation efficiency of the stator core body 1.

[0042] The embodiments of the present invention further realize that the existing device can produce a gradual profile of the tooth groove in actual use, so that the magnetic flux density is gradually uniform from the tooth to the yoke, which is convenient to use and better than traditional products.

[0043] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wound motor stator core, characterized in that: The device includes a soft magnetic tape (111), on which a plurality of linear array mounting slots (101) are provided. The soft magnetic tape (111) is a stator core body (1) formed by spiral winding by an external winding device. The spirally wound mounting slots (101) are located in the inner ring of the stator core body (1) and arranged longitudinally. The inner wall of the mounting slots (101) in the inner ring of the stator core body (1) has a first coil (5) arranged in a ring, and the inner wall of the mounting slots (101) has a second coil (6) arranged in a ring, which is interleaved with the insulating paper (3). The inner wall of the mounting slots (101) is provided with an insulating mechanism that insulates the first coil (5) and the second coil (6) from the stator core body (1).

2. The wound motor stator core according to claim 1, characterized in that: The insulation mechanism includes insulating paper (3) provided on the inner wall of each of the mounting slots (101) to prevent short circuit between the first coil (5) and the second coil (6) and the stator core body (1). Each of the insulating papers (3) is respectively fitted on the outer contour of the first coil (5) and the second coil (6) on the inner wall of the mounting slot (101) at the corresponding position.

3. A wound motor stator core according to claim 2, characterized in that: Each of the mounting slots (101) is provided with a first insulating pad (2) at one end near the outside of the stator core body (1) to provide insulating support for the first coil (5) and the second coil (6) on the inner wall, and a second insulating pad (4) at one end near the inside of the stator core body (1) to seal the port.

4. A wound motor stator core according to claim 1, characterized in that: The soft magnetic tape material (111) has a plurality of linear array heat dissipation holes (102) arranged in a ring on the spirally wound stator core body (1), and the heat dissipation holes (102) are spirally stacked and connected on the stator core body (1).

5. A wound motor stator core according to claim 4, characterized in that: The soft magnetic tape material (111) has a plurality of linear array mounting holes (103) arranged in a ring on the spirally wound stator core body (1), and the mounting holes (103) are spirally stacked and connected on the stator core body (1). The stator core body (1) is provided with a heat dissipation mechanism for rapid conduction and dissipation of heat accumulated inside.

6. A wound motor stator core according to claim 5, characterized in that: The heat dissipation mechanism includes heat dissipation copper rings (9) at both ends of the stator core body (1) for conducting heat dissipation inside the stator core body (1). Each of the two heat dissipation copper rings (9) has multiple annular arrays of connecting slots (901) and connecting holes (902). The connecting slots (901) are respectively located in corresponding positions to the heat dissipation holes (102), and the connecting holes (902) are respectively located in corresponding positions to the mounting holes (103).

7. A wound motor stator core according to claim 6, characterized in that: The inner walls of each pair of adjacent connecting holes (902) and mounting holes (103) are provided with heat-conducting copper rods (7) that conduct heat from the inside of the stator core body (1) to the heat dissipation copper ring (9). Each heat-conducting copper rod (7) has a threaded groove (701) on its outer contour at both ends. Each heat-conducting copper rod (7) has a fixing nut (8) that is screwed and fixed to the heat dissipation copper ring (9) at both ends of the threaded groove (701).

8. A method for manufacturing a wound motor stator core, applied to the wound motor stator core according to any one of claims 1-7, comprising the following steps: S1, Spiral winding of soft magnetic tape material (111): The mounting grooves (101) on the soft magnetic tape material (111) are spirally wound and stacked to a set number of turns by an external winding device to form a complete stator core body (1). S2. Install insulation material: Place the insulating paper (3) on the outer contour of the first coil (5) and the second coil (6) on the inner wall of the mounting groove (101), and the first insulating pad (2) and the second insulating pad (4) are supported at both ends of the inner wall of the mounting groove (101) to ensure the stability of the first coil (5) and the second coil (6) on the inner wall of the mounting groove (101). At the same time, the second insulating pad (4) can seal the opening inside the mounting groove (101). S3, heat dissipation channel: Through the heat dissipation holes (102) and mounting holes (103) opened on the soft magnetic tape material (111), the soft magnetic tape material (111) is spirally wound to the stator core body (1), so that the heat dissipation holes (102) and mounting holes (103) can be arranged in a ring array on the stator core body (1), and the heat dissipation holes (102) and mounting holes (103) wound and stacked on the stator core body (1) are arranged longitudinally and connected, so that the heat generated inside the stator core body (1) can be directly dissipated through the heat dissipation holes (102), shortening the heat conduction path; S4. Thermally conductive embedded structure: The thermally conductive copper rod (7) is embedded in the mounting hole (103) on the inner wall of the stator core body (1). The thermally conductive copper rod (7) is made of copper with high thermal conductivity. The thermally conductive copper rod (7) can use the high thermal conductivity of copper to quickly conduct heat from the inside of the stator core body (1) to the heat dissipation copper rings (9) at both ends. The heat dissipation copper rings (9) are fixed on the inner wall of the motor housing. Thus, the heat dissipation copper rings (9) can conduct heat to the motor housing, thereby improving the heat dissipation efficiency of the stator core body (1).

Images