Motor stator assembly, motor, electrical equipment and method for processing stator assembly

Abstract

The present application relates to a motor stator assembly, a motor, an electrical device, and a method for manufacturing the stator assembly. The back-wound motor stator assembly includes: a stator core, the stator core comprising a stator yoke, outer stator teeth, and inner stator teeth, the outer stator teeth being disposed circumferentially outward of the stator yoke, and the inner stator teeth being disposed circumferentially inward of the stator yoke; and insulating plates disposed at both end faces of the stator core in the axial direction. The technical solution of the present application effectively solves the problem of short circuits in prior art back-wound motor stator assemblies.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor stator assembly, a motor, an electrical device, and a method for processing the stator assembly. Background Art

[0002] High-speed permanent magnet generators (PMGs) are a hot topic in the international electrical engineering field due to their high power density, high transmission efficiency, zero excitation loss, and high efficiency. However, due to their high speed, small number of pole pairs, and large pitch, these generators have high coil heights and poor heat dissipation at the ends, leading to localized overheating and reduced motor life.

[0003] In order to solve the problem of heat dissipation at the end, most high-speed motors now use back-wound motor windings. Figure 1 As shown, the prior art back-wound motor includes a rotor 1, a stator 2, and a winding 3. This structure significantly shortens the motor winding structure and reduces heating of the end windings. Because the back-wound structure requires cross-slot connection during winding insertion, the insulation distance between the winding and the core is too small. This creates a risk of friction between the winding and the core during insertion, potentially breaking the paint coating and causing a short circuit during motor operation, burning the winding. Summary of the Invention

[0004] The present application provides a motor stator assembly, a motor, an electrical device, and a method for processing the stator assembly, which are used to solve the problem in the prior art that back-wound motor stator assemblies are prone to short circuits.

[0005] To solve the above problems, the present application provides a back-wound motor stator assembly, comprising: a stator core, the stator core comprising a stator yoke, outer stator teeth and inner stator teeth, the outer stator teeth being arranged on the circumferential outside of the stator yoke, and the inner stator teeth being arranged on the circumferential inside of the stator yoke; and an insulating plate, the insulating plate being arranged on both end surfaces of the stator core along the axial direction.

[0006] Furthermore, the insulating plate includes an insulating plate body, and projections of the insulating plate body and the stator yoke along the axial direction of the stator yoke overlap.

[0007] Furthermore, the width of the insulating plate close to the stator core is greater than the width of the insulating plate away from the stator core, and the side of the insulating plate close to the stator core to the side of the insulating plate away from the stator core is an arc-shaped transition.

[0008] Furthermore, the insulating plate further includes external teeth, which are arranged on the circumferential outer side of the insulating plate body, and the external teeth are arranged corresponding to the outer stator teeth.

[0009] Furthermore, the width of the outer teeth is less than or equal to the width of the outer stator teeth, and the height of the outer teeth is less than the height of the outer stator teeth.

[0010] Furthermore, the insulating plate further includes inner teeth, which are arranged on the circumferential inner side of the insulating plate body, and the inner teeth are arranged corresponding to the inner stator teeth.

[0011] Furthermore, the width of the inner teeth is less than or equal to the width of the inner stator teeth, and the height of the inner teeth is less than the height of the inner stator teeth.

[0012] Furthermore, the insulating plate further includes a limiting portion, which is provided on the insulating plate body and extends in the direction of the stator core to cooperate with the stator core.

[0013] Furthermore, the limiting portion includes a first pair of limiting legs and a second pair of limiting legs, the first pair of limiting legs includes two first limiting legs, the two first limiting legs are located at the connection between the outer teeth and the insulating plate body, the two first limiting legs are located on both sides of the outer stator teeth and are located on the circumferential outside of the insulating plate body; the second pair of limiting legs includes two second limiting legs, the two second limiting legs are located at the connection between the inner teeth and the insulating plate body, the two second limiting legs are located on both sides of the inner stator teeth and are located on the circumferential inside of the insulating plate body.

[0014] Furthermore, the insulating plate on the same side of the stator core includes a plurality of sub-insulating plates, and the plurality of sub-insulating plates are spliced into a closed annular shape.

[0015] Furthermore, the insulating plate is made of polytetrafluoroethylene.

[0016] According to another aspect of the present invention, a motor is provided, comprising a motor body and a back-wound motor stator assembly disposed in the motor body, wherein the back-wound motor stator assembly is the above-mentioned back-wound motor stator assembly.

[0017] According to another aspect of the present invention, an electrical device is provided, comprising the above-mentioned motor.

[0018] According to another aspect of the present invention, a method for processing a stator assembly is also provided. The motor stator assembly is the above-mentioned back-wound motor stator assembly. The method includes the following steps: installing a stator core; assembling an insulating plate on the stator core to form a stator frame; and winding copper wire on the stator frame.

[0019] The above technical solution provided by this application has the following advantages compared with the existing technology:

[0020] Applying the technical solution of the present application, the stator core includes a stator yoke, outer stator teeth and inner stator teeth, so that the stator core is divided into different slots, and insulating plates are provided on both end faces of the stator core in the axial direction. In this way, due to the isolation of the insulating plates, the winding will not short-circuit with the core. Moreover, when the winding crosses different slots, there is no risk of friction between the winding and the core scratching the paint, thereby avoiding the problem of short-circuiting during the operation of the motor. The technical solution of the present application effectively avoids the problem of short-circuiting in the stator assembly of the back-wound motor in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 The figure shows a schematic structural diagram of a back-wound motor stator assembly in the prior art;

[0024] Figure 2 A schematic structural diagram of a first embodiment of a motor stator assembly of the present application is shown;

[0025] Figure 3 Shown Figure 1 A schematic diagram of the three-dimensional structure of the insulating plate of the motor stator assembly;

[0026] Figure 4 Shown Figure 3 A schematic diagram of a main view of an insulating board;

[0027] Figure 5 Shown Figure 3 A schematic side view of an insulating plate;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of a second embodiment of the insulating plate of the motor stator assembly of the present application is shown;

[0029] Figure 7 Shown Figure 6 A schematic diagram of a main view of an insulating board;

[0030] Figure 8 A schematic diagram of the three-dimensional structure of the insulating plate of the motor stator assembly of the present application is shown;

[0031] Figure 9Shown Figure 8 A schematic diagram of a main view of an insulating board;

[0032] Figure 10 A schematic diagram of the three-dimensional structure of a fourth embodiment of the insulating plate of the motor stator assembly of the present application is shown;

[0033] Figure 11 Shown Figure 10 A schematic diagram of a main view of an insulating board;

[0034] Figure 12 A structural schematic diagram of a fifth embodiment of the motor stator assembly of the present application is shown.

[0035] The above drawings include the following reference numerals:

[0036] 10. Stator core; 11. Stator yoke; 12. Outer stator teeth; 13. Inner stator teeth; 20. Insulation plate; 21. Insulation plate body; 22. Outer teeth; 23. Inner teeth; 24. Limiting portion; 100. Winding. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] like Figures 2 to 5 As shown, the technical solution of the first embodiment provides a back-wound motor stator assembly comprising a stator core 10 and an insulating plate 20. The stator core 10 includes a stator yoke 11, outer stator teeth 12, and inner stator teeth 13. The outer stator teeth 12 are arranged on the circumferential outside of the stator yoke 11, and the inner stator teeth 13 are arranged on the circumferential inside of the stator yoke 11. The insulating plate 20 is arranged on both end surfaces of the stator core 10 in the axial direction.

[0039] Applying the technical solution of this embodiment, the stator core 10 includes a stator yoke 11, outer stator teeth 12 and inner stator teeth 13, so that the stator core 10 is divided into different slots, and the insulating plates 20 are arranged on the two end faces of the stator core 10 in the axial direction. In this way, due to the isolation of the insulating plates 20, the winding 100 will not short-circuit with the core. Moreover, when the winding 100 crosses different slots, there is no risk of friction between the winding 100 and the stator core 10 scratching the paint, thereby avoiding the problem of short circuit during operation of the motor. The technical solution of this embodiment effectively avoids the problem of short circuit in the stator assembly of the back-wound motor in the prior art.

[0040] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the insulating plate 20 includes an insulating plate body 21, and the projections of the insulating plate body 21 and the stator yoke 11 along the axial direction of the stator yoke 11 overlap. The above structure avoids the problem of the winding 100 damaging the paint and causing a short circuit during winding due to the insulating plate body 21 having a smaller projection along the axial direction of the stator yoke 11 than the projection of the stator yoke 11. In addition, the above structure avoids the problem of the winding 100 becoming loose during winding and use due to the insulating plate body 21 having a larger projection along the axial direction of the stator yoke 11 than the projection of the stator yoke 11.

[0041] like Figure 3 As shown, in the technical solution of this embodiment, the width of the side of the insulating plate 20 close to the stator core 10 is greater than the width of the side of the insulating plate 20 away from the stator core 10, and the side of the insulating plate 20 close to the stator core 10 to the side of the insulating plate 20 away from the stator core 10 forms an arc-shaped transition. The above structure makes the winding 100 more adaptable during winding and use. The width of the insulating plate 20 from the side close to the stator core 10 to the side away from the stator core 10 gradually decreases in an arc shape, that is, the outer side of the insulating plate 20 decreases, and the inner side of the insulating plate 20 also gradually decreases. In this way, when winding the winding 100, the tensioning force and tightness of the winding 100 are better. It should be noted that in the technical solution of this embodiment, the thickness of each insulating plate 20 is between 3mm and 5mm. In the technical solution of Example 1, the insulating plate 20 located on each side of the stator core 10 is composed of multiple sub-insulating plates. The number of sub-insulating plates is the same as the number of outer stator teeth 12 of the stator core 10. The number of outer stator teeth 12 and inner stator teeth 13 is the same. There are multiple outer stator teeth 12 and inner stator teeth 13, and the outer stator teeth 12 and inner stator teeth 13 are in a one-to-one correspondence along the radial direction of the stator core 10. The axes of the corresponding outer stator teeth 12 and the axes of the corresponding inner stator teeth 13 are on the extension of the same diameter, and the sub-insulating plates are symmetrically arranged along the central axis.

[0042] like Figures 3 to 5As shown, in the technical solution of this embodiment, the insulating plate 20 also includes external teeth 22, which are arranged on the circumferential outer side of the insulating plate body 21, and the external teeth 22 are arranged corresponding to the outer stator teeth 12. The corresponding arrangement of the external teeth 22 and the outer stator teeth 12 has two meanings: first, there are multiple outer stator teeth 12, and the external teeth 22 are multiple and correspond one-to-one to the outer stator teeth 12; second, the width of the external teeth 22 is the same as the width of the outer stator teeth 12. The above structure avoids short circuit between the winding 100 and the stator core 10, and the insulating plate 20 forms a better limiting effect on the winding 100. In the technical solution of this application, the width Wt2 of the external teeth 22 is less than or equal to the width of the outer stator teeth 12. This embodiment adopts the width of the external teeth 22 equal to the width of the outer stator teeth 12. The connection between the outer teeth 22 and the insulating plate body 21 is an arc connection with a radius of 5 mm. The arc connection structure prevents the paint of the winding 100 located outside the stator assembly from being scratched.

[0043] like Figure 4 As shown, in the technical solution of this embodiment, the width Wt2 of the outer teeth 22 is less than or equal to the width of the outer stator teeth 12, and the height h02 of the outer teeth 22 is less than the height of the outer stator teeth 12. The outer teeth 22 serve to limit the position of the winding 100. For example, if the winding 100 is made of copper wire, the width Wt2 of the outer teeth 22 is equal to the width of the outer stator teeth 12, preventing the copper wire from being scratched by the stator core 10 and causing a short circuit. The height h02 of the outer teeth 22 is less than the height of the outer stator teeth 12, which effectively prevents interference between the insulating plate 20 and other components of the motor.

[0044] like Figure 4 As shown, in the technical solution of this embodiment, the insulating plate 20 also includes internal teeth 23, which are arranged circumferentially inwardly of the insulating plate body 21. The internal teeth 23 correspond to the inner stator teeth 13. The portion of the winding 100 located on the inner side of the stator assembly is less likely to scratch the paint, and the inner stator teeth 13 serve as a position limiter for the winding 100 located on the inner side. Specifically, in the technical solution of this embodiment, the connection between the internal teeth 23 and the insulating plate body 21 is an arc-shaped connection with a radius of 5 mm, which further ensures that the paint of the winding 100 will not be scratched.

[0045] like Figure 4As shown, in the technical solution of this embodiment, the width Wt1 of the inner teeth 23 is equal to the width of the inner stator teeth 13, and the height of the inner teeth 23 is less than the height of the inner stator teeth 13. The width Wt1 of the inner teeth 23 is equal to the width of the inner stator teeth 13, ensuring that the paint coating of the winding 100 is not easily scratched. The height h01 of the inner teeth 23 is less than the height of the inner stator teeth 13, preventing the insulating plate 20 from interfering with other components of the motor. In other embodiments, the width Wt of the inner teeth 23 can be less than the width of the inner stator teeth 13. It should be noted that the outer stator teeth 12 and the inner stator teeth 13 are each arranged in a one-to-one correspondence, and are evenly arranged along the circumference. The outer teeth 22 and the inner teeth 23 are each arranged in a one-to-one correspondence, and the outer teeth 22 are evenly arranged along the outer circumference of the insulating plate body 21, and the inner teeth 23 are evenly arranged along the inner circumference of the insulating plate body 21. The outer teeth 22 are provided in a one-to-one correspondence with the outer stator teeth 12 , and the inner teeth 23 are provided in a one-to-one correspondence with the inner stator teeth 13 .

[0046] like Figure 4 As shown, in this embodiment, the insulating frame tooth width Wt is equal to the width Wt2 of the outer teeth 22 and equal to the width Wt1 of the inner teeth 23 , and the height h01 of the inner teeth 23 is greater than the height h02 of the outer teeth 22 .

[0047] like Figures 2 to 5 As shown, in the technical solution of this embodiment, the insulating plate 20 further includes a stopper 24. The stopper 24 is provided on the insulating plate body 21 and extends toward the stator core 10 to engage with the stator core 10. The provision of the stopper 24 facilitates the engagement of the insulating plate 20 with the stator core 10. Specifically, the insulating plate 20 can be simply installed on the stator core 10 without requiring dedicated staff to perform the engagement. This structure improves the engagement precision between the insulating plate 20 and the stator core 10, reduces labor intensity, and improves efficiency.

[0048] like Figure 3As shown, in the technical solution of this embodiment, the limiting portion 24 includes a first pair of limiting legs and a second pair of limiting legs. The first pair of limiting legs includes two first limiting legs, which are located at the connection between the outer teeth 22 and the insulating plate body 21. The two first limiting legs are located on either side of the outer stator teeth 12 and are located circumferentially outside the insulating plate body 21. The second pair of limiting legs includes two second limiting legs, which are located at the connection between the inner teeth 23 and the insulating plate body 21. The two second limiting legs are located on either side of the inner stator teeth 13 and are located circumferentially inside the insulating plate body 21. This structure has low installation costs and is easy to operate. Specifically, in the technical solution of this embodiment, the distance between the limiting legs in the same pair is 0.1 mm wider than the corresponding outer teeth 22 or inner teeth 23. Due to the force applied by the winding 100, an interference fit is not required. That is, the distance between the two first limiting legs is greater than the width of the outer stator tooth 12, and can be 0.1 mm greater. The same applies to the two second limiting legs.

[0049] Specifically, the limiting legs have an arc-shaped arc shape when projected along the insulating plate 20, i.e., one side is arc-shaped, with two straight lines at each end. The arc-shaped side faces toward the insulating plate body 21, and the plane of each limiting leg forms a 45° angle with the axis of the insulating plate 20. This structure ensures that the insulating plate 20 and the stator core 10 fit together smoothly without any jamming, and that the winding 100 and the insulating plate 20 are not likely to scratch the paint.

[0050] like Figure 3 As shown, in the technical solution of this embodiment, the insulating plate 20 is made of polytetrafluoroethylene. The insulating plate 20 made of the above material has a good insulation effect and is not likely to scratch the paint coating of the copper wire when in contact with it, thereby ensuring the safety of the stator assembly.

[0051] like Figure 3 As shown, in the technical solution of this embodiment, the insulating plate 20 on the same side of the stator core 10 includes multiple sub-insulating plates, which are spliced into a closed circular ring. The number of sub-insulating plates is the same as the number of outer stator teeth 12.

[0052] From the above, it can be seen that a split insulating frame (insulating plate 20) is used. By installing the insulating frame on both end faces of the stator, the legs of the insulating frame are clamped at the roots of the stator teeth, covering the end faces of the iron core, ensuring that the winding 100 only contacts the softer insulating frame when it is bent.

[0053] The stator assembly in this embodiment includes a stator core 10 and an insulating plate 20. The number of pole pairs of the motor including the stator assembly is P, and the motor is applied to an m-phase motor system.

[0054] The stator core 10 is made of several stator punchings of the same shape stacked and welded along the axial direction; it can be seen from the stator punchings that there are two circles of slots distributed along the circumferential direction, located on the outer circle and inner circle of the stator core 10 respectively, and the number of slots is Z (Z is an integer that can be divided by 2mP). The insulating skeleton is composed of an insulating surface (insulating plate body 21) and a limiting portion 24 (support leg). The insulating surface is approximately trapezoidal. The top of the approximately trapezoid coincides with the bottom of the outer stator slot of the stator core 10, that is, the upper arc radius R2 of the insulating surface = the outer stator slot bottom radius, and the bottom of the approximately trapezoid coincides with the inner stator slot bottom of the stator core 10, that is, the lower arc radius R1 of the insulating surface = the inner stator slot bottom radius. The center angle formed by the two waistlines of the trapezoid is 360° / Z. The top and bottom of the trapezoid extend outward from the middle to form a rectangle, which is similar to the inner stator tooth 13 and the outer stator tooth 12. It can cover the tooth portion without exceeding the tooth portion and does not interfere with the winding 100 in the stator slot. The tooth width Wt of the insulating frame is ≤ the stator tooth width, the length of the lower part of the insulating frame h01 is less than the inner stator tooth height, and the height of the upper part of the insulating frame h02 is less than the outer stator tooth height; a transition arc is used at the junction of the top and bottom of the approximate trapezoid and the extended rectangle, and four support legs perpendicular to the insulating surface are provided at the arc. The upper and lower support legs are clamped with the roots of the inner and outer stator teeth of the stator respectively, so as to fix the insulating frame to the end face of the stator core 10. When the wire is embedded, the winding 100 crosses from the inner stator slot to the outer stator slot; when crossing the slot, since the insulating frame covers the stator end face, the winding 100 contacts the insulating surface, thereby preventing the enameled wire from scratching or rubbing against the end of the stator core 10, causing damage to the insulating paint layer and causing a short circuit in the motor.

[0055] The above insulating frames are arranged along the circumferential direction, with a total of Z pieces, forming a whole circle, to ensure that the winding 100 can reliably contact the insulating frames when crossing the slots.

[0056] In addition to the above embodiments, as other feasible embodiments, according to the number of slots in the stator of different motors, the above-mentioned sub-insulating bone plates that are integer multiples of 2 or multiples of 3 can be combined into a large insulating frame, or even Z sub-insulating plates can be combined into one large insulating frame and installed on the side surfaces of both ends of the stator.

[0057] For integer-slot motor stators, it is generally recommended to design the insulation frame so that the angle between the two waist lines is 360° / Z. The waist line angle of the insulation frame can also be designed to be 360 / (Z / (2mP)). In this way, only 2mP pieces of the frame are needed for the end face of the core on one side.

[0058] The insulating skeleton can be made of electrical insulating and flame retardant materials and processed by machining, injection molding, 3D printing, etc.

[0059] like Figure 6 and Figure 7As shown, the difference between the technical solution of the second embodiment and the first embodiment is that each sub-insulating plate of the second embodiment is composed of two sub-insulating plates of the first embodiment combined together.

[0060] like Figure 8 and Figure 9 As shown, the difference between the technical solution of the third embodiment and the first embodiment is that each sub-insulating plate of the second embodiment is composed of three sub-insulating plates of the first embodiment combined together.

[0061] like Figure 10 and Figure 11 As shown, the difference between the technical solution of the fourth embodiment and the first embodiment is that each sub-insulating plate of the second embodiment is composed of four sub-insulating plates of the first embodiment combined together.

[0062] like Figure 12 As shown, the technical solution of the fifth embodiment differs from that of the first embodiment in that the insulating plates 20 on each side of the stator core 10 are integral.

[0063] The present application also provides a motor, which includes a motor body and a back-wound motor stator assembly disposed in the motor body, wherein the back-wound motor stator assembly is the above-mentioned back-wound motor stator assembly.

[0064] The present application also provides an electrical device. The electrical device includes the above-mentioned motor. The electrical device includes an air conditioner, a fresh air device, etc.

[0065] The present application also provides a method for processing a stator assembly, wherein the motor stator assembly is the above-mentioned back-wound motor stator assembly, and the method comprises the following steps: assembling a stator core 10; assembling an insulating plate 20 on the stator core 10 to form a stator frame; and winding copper wire on the stator frame.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0067] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A back-wound motor stator assembly, characterized in that: include: A stator core (10), the stator core (10) comprising a stator yoke (11), outer stator teeth (12) and inner stator teeth (13), the outer stator teeth (12) being arranged on the circumferential outside of the stator yoke (11), and the inner stator teeth (13) being arranged on the circumferential inside of the stator yoke (11); Insulation plates (20), the insulation plates (20) being arranged on both end surfaces of the stator core (10) in the axial direction; The insulating plate (20) further comprises external teeth (22), the external teeth (22) being arranged on the circumferential outer side of the insulating plate body (21), and the external teeth (22) being arranged corresponding to the outer stator teeth (12); The insulating plate (20) further includes inner teeth (23), the inner teeth (23) being arranged on the circumferential inner side of the insulating plate body (21), the inner teeth (23) being arranged corresponding to the inner stator teeth (13); The insulating plate (20) further includes a limiting portion (24), wherein the limiting portion (24) is provided on the insulating plate body (21) and extends in the direction of the stator core (10) to cooperate with the stator core (10); The limiting portion (24) includes a first pair of limiting legs and a second pair of limiting legs, the first pair of limiting legs including two first limiting legs, the two first limiting legs being located at the connection between the outer teeth (22) and the insulating plate body (21), the two first limiting legs being located on both sides of the outer stator teeth (12) and located on the circumferential outer side of the insulating plate body (21); the second pair of limiting legs including two second limiting legs, the two second limiting legs being located at the connection between the inner teeth (23) and the insulating plate body (21), the two second limiting legs being located on both sides of the inner stator teeth (13) and located on the circumferential inner side of the insulating plate body (21); The insulating plate (20) on the same side of the stator core (10) comprises a plurality of sub-insulating plates, which are spliced into a closed circular ring; and each sub-insulating plate is provided with two first limiting legs and two second limiting legs.

2. The back-wound motor stator assembly according to claim 1, characterized in that: The insulating plate (20) includes an insulating plate body (21), and projections of the insulating plate body (21) and the stator yoke (11) along the axial direction of the stator yoke (11) overlap.

3. The back-wound motor stator assembly according to claim 2, characterized in that: The width of the side of the insulating plate (20) close to the stator core (10) is greater than the width of the side of the insulating plate (20) away from the stator core (10), and the side of the insulating plate (20) close to the stator core (10) to the side of the insulating plate (20) away from the stator core (10) is an arc-shaped transition.

4. The back-wound motor stator assembly according to claim 3, characterized in that: The width of the outer teeth (22) is less than or equal to the width of the outer stator teeth (12), and the height of the outer teeth (22) is less than the height of the outer stator teeth (12).

5. The back-wound motor stator assembly according to claim 1, characterized in that: The width of the inner teeth (23) is less than or equal to the width of the inner stator teeth (13), and the height of the inner teeth (23) is less than the height of the inner stator teeth (13).

6. The back-wound motor stator assembly according to any one of claims 1 to 5, characterized in that: The insulating plate (20) is made of polytetrafluoroethylene.

7. A motor, characterized in that: The invention comprises a motor body and a back-wound motor stator assembly arranged in the motor body, wherein the back-wound motor stator assembly is the back-wound motor stator assembly according to any one of claims 1 to 6.

8. An electrical device, characterized in that: The electrical equipment includes the motor according to claim 7.

9. A method for processing a stator assembly, characterized in that: The stator assembly is a back-wound motor stator assembly according to any one of claims 1 to 6, and the method comprises the following steps: Assembling the stator core (10); Assembling an insulating plate (20) on the stator core (10) to form a stator frame; Copper wire is wound on the stator frame.

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