Stator punching sheet, stator core, motor, compressor and refrigeration equipment

Abstract

The utility model relates to the technical field of motors, and provides a stator punching sheet, a stator core, a motor, a compressor and refrigeration equipment, and the stator punching sheet comprises a stator yoke part which is of an annular structure; the plurality of stator teeth are arranged on the inner circumferential surface of the stator yoke part and are arranged along the circumferential direction of the stator yoke part, and the inner circumferential surface of the stator yoke part and two adjacent stator teeth are encircled to form a stator slot; the plurality of groove structures are arranged on the outer circumferential surface of the stator yoke part and are distributed along the circumferential direction of the stator yoke part, in the radial cross section of the stator yoke part, the groove bottom of each stator groove is an arc, the radius of the arc is R3, the distance from the groove bottom of each groove structure to the circle center of the stator yoke part is E, and the included angle between the center line of each groove structure and the center line of each stator tooth is theta, the outer circle radius of the stator yoke part is R2, the groove depth of the groove structure is L. The groove depth L of the groove structure meets the condition that R2-E is larger than or equal to 0.4 * R3-E * sin theta and smaller than or equal to R3, so that the situation that the local width of the stator yoke part is too narrow is avoided, and the overload capacity and efficiency of the motor are improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a stator punching sheet, a stator core, a motor, a compressor, and a refrigeration device. Background Art

[0002] At present, in order to allow air to pass through, the motor of the existing air-conditioning compressor is usually equipped with cut edges and grooves on the outer circle of the stator yoke. The position or design size of the cut edges and grooves is unreasonable, resulting in a local reduction in the width of the stator yoke, making the local magnetic field easy to saturate, and aggravating the uneven distribution of the magnetic field, reducing the motor efficiency and maximum output capacity. Utility Model Content

[0003] The present application aims to at least solve the technical problem in the related art that a cutting structure and a groove structure are set on the outer circle of the stator yoke, and the position or design size of the cutting structure and the groove structure are unreasonable, resulting in a reduction in the local width of the stator yoke, an increase in the local magnetic field strength, and an aggravation of the uneven distribution of the magnetic field, resulting in serious local magnetic field saturation of the stator yoke, affecting the motor efficiency and maximum output capacity.

[0004] To this end, a first aspect of the present application provides a stator punching sheet.

[0005] A second aspect of the present application provides a stator core.

[0006] A third aspect of the present application provides an electric motor.

[0007] A fourth aspect of the present application provides a compressor.

[0008] A fifth aspect of the present application provides a refrigeration device.

[0009] In view of this, the present application provides a stator punching sheet, including: a stator yoke, which is a circular ring structure; a plurality of stator teeth, which are arranged on the inner circumferential surface of the stator yoke and along the circumference of the stator yoke, and the inner circumferential surface of the stator yoke and two adjacent stator teeth are arranged to form a stator slot; a plurality of groove structures, which are arranged on the outer circumferential surface of the stator yoke and distributed along the circumference of the stator yoke, in the radial cross-section of the stator yoke, the bottom of the stator slot is an arc, the arc radius is R3, the distance from the bottom of the groove structure to the center of the stator yoke is E, the angle between the center line of the groove structure and the center line of the stator tooth is θ, the outer radius of the stator yoke is R2, and the groove depth of the groove structure is L, wherein the groove depth L of the groove structure satisfies: 0.4×R3-E×sinθ≤R2-E≤R3.

[0010] The stator lamination provided in this application includes a stator yoke, stator teeth, and a groove structure. The stator yoke is configured as a circular ring structure, with multiple stator teeth disposed on the inner circumferential surface of the stator yoke and distributed along the circumference of the stator yoke. The inner circumferential surface of the stator yoke and two adjacent stator teeth form stator slots. The stator punching sheet also includes a groove structure, and there are multiple groove structures. The multiple groove structures are arranged on the outer circumferential surface of the stator yoke and distributed along the circumference of the stator yoke, and the groove structure extends along the axial direction of the stator yoke. In the radial cross-section of the stator yoke, the bottom of the stator slot is an arc, that is, the bottom of the stator slot is an arc-shaped bottom, and the arc radius of the bottom of the stator slot is R3. The distance from the bottom of the groove structure to the center of the stator yoke is E, the angle between the center line of the groove structure and the center line of the stator tooth is θ, the outer radius of the stator yoke is R2, and the groove depth of the groove structure is L, wherein the groove depth L of the groove structure satisfies: 0.4×R3-E×sinθ≤R2-E≤R3.

[0011] Specifically, by limiting the groove depth L of the groove structure to satisfy: 0.4×R3-E×sinθ≤R2-E≤R3, the design size of the groove structure on the stator yoke can be limited, thereby preventing the stator yoke from being too narrow locally. While increasing the width of the stator yoke to the greatest extent, the overall width of the stator yoke is kept as uniform as possible to avoid the local width of the stator yoke being too narrow, that is, avoiding the stator yoke width from having a "short board" that causes excessive saturation of the local magnetic flux of the stator yoke and increased copper loss and iron loss, thereby improving the motor overload capacity and efficiency. Furthermore, while ensuring that the outer circle of the stator core meets the current flow, the stator yoke width and the uniformity of its magnetic field distribution are improved. Compared with the traditional scheme, the motor efficiency can be improved by 0.6%.

[0012] The stator punching sheet according to the above technical solution of the present application may also have the following additional technical features:

[0013] In some technical solutions, optionally, a trimming structure is provided on the outer circumferential surface of the stator yoke, the number of the trimming structures is M, the number of the stator slots provided on the stator yoke is Q, and the number of the groove structures provided on the stator yoke is N.

[0014]

[0015] And the angle θ between the center line of the groove structure and the center line of the stator tooth satisfies: -1°<θ<1°; wherein M is a positive integer greater than or equal to 2, and Q is a positive integer greater than or equal to 16.

[0016] In this technical solution, the stator punching sheet further includes a trimming structure, which is provided on the outer circumferential surface of the stator yoke. The number of trimming structures is M, the number of stator slots provided on the stator yoke is Q, and the number of groove structures provided on the stator yoke is N. The number of groove structures N, the number of trimming structures M, and the number of stator slots Q satisfy the following relationship:

[0017]

[0018] And the angle θ between the center line of the groove structure and the center line of the stator tooth satisfies: -1°<θ<1°; wherein M is a positive integer greater than or equal to 2, and Q is a positive integer greater than or equal to 16.

[0019] Specifically, by limiting the relationship between the number N of groove structures and the number M of cutting edge structures, as well as the number Q of stator slots, the number of groove structures can be optimized. By optimizing the number of groove structures, the groove structures can be reasonably distributed on the stator punching sheets. At the same time, by limiting the range of the angle θ between the center line of the groove structure and the center line of the stator teeth, the setting position of the groove structure on the stator yoke can be optimized. By optimizing the setting position of the groove structure, the groove structure can be reasonably distributed on the stator punching sheets, ensuring that the outer circle of the stator core meets the condition of through-current, while maximizing the width of the stator yoke, the overall width of the stator yoke is kept as uniform as possible, avoiding the local width of the stator yoke being too narrow, and avoiding the "short board" of the stator yoke width, causing the local magnetic flux of the stator yoke to be over-saturated and increase the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor.

[0020] In some technical solutions, optionally, in a radial cross section of the stator yoke, the notch of the groove structure faces the outer circle of the stator yoke, the groove bottom of the groove structure is set as a straight line segment, the groove bottom width of the groove structure is D, and the tooth width of the stator tooth is A, wherein,

[0021]

[0022] In this technical solution, in the radial cross section of the stator yoke, that is, in the cross section perpendicular to the axis of the stator yoke, the notch of the groove structure faces the outer circle of the stator yoke, that is, the opening of the groove structure faces the outer circle of the stator yoke, and the groove bottom of the groove structure is set as a straight line segment, that is, the groove bottom of the groove structure is a straight line groove bottom, the groove bottom width of the groove structure is D, and the tooth width of the stator tooth is A, wherein,

[0023]

[0024] By setting the range relationship between the groove bottom width D of the groove structure and the tooth width A of the stator teeth, the design size of the groove structure on the stator yoke can be optimized, so that the groove structure is reasonably designed and distributed on the stator punching sheet, ensuring that the width of the stator yoke is increased to the greatest extent under the condition that the outer circle of the stator core meets the flow condition, and at the same time, the overall width of the stator yoke is kept uniform as much as possible to avoid the local width of the stator yoke being too narrow, that is, to avoid the stator yoke width having a "short board", resulting in excessive saturation of the local magnetic flux of the stator yoke and increased copper loss and iron loss, thereby improving the motor overload capacity and efficiency.

[0025] In some technical solutions, optionally, in a radial cross section of the stator yoke, the slot width of the groove structure is H, and the slot width H of the groove structure satisfies:

[0026]

[0027] In this technical solution, in the radial cross section of the stator yoke, that is, in the cross section perpendicular to the axis of the stator yoke, the slot width of the groove structure is H, and the slot width H of the groove structure satisfies:

[0028]

[0029] By setting the range relationship between the slot width H of the slot structure and the tooth width A of the stator teeth and the slot bottom arc radius R3 of the stator slot, the design size of the slot structure in the stator yoke can be optimized, especially by limiting the width range of the slot in the slot structure, so that the slot structure is reasonably designed and distributed on the stator punching sheet, ensuring that the width of the stator yoke is increased to the greatest extent under the condition that the outer circle of the stator core meets the flow condition, and at the same time, the overall width of the stator yoke is kept uniform as much as possible to avoid the local width of the stator yoke being too narrow, that is, to avoid the stator yoke width having a "short board", resulting in excessive saturation of the local magnetic flux of the stator yoke and increased copper loss and iron loss, thereby improving the motor overload capacity and efficiency.

[0030] In some technical solutions, optionally, the stator slot includes a first stator slot and a second stator slot, and multiple first stator slots and multiple second stator slots are alternately arranged on the inner circumferential surface of the stator yoke, wherein, along the radial direction of the stator yoke, the slot openings of the first stator slot and the second stator slot are toward the center of the stator yoke, and the depth of the first stator slot is greater than the depth of the second stator slot.

[0031] In this technical solution, the stator slots include a first stator slot and a second stator slot. Multiple first stator slots and multiple second stator slots are spaced apart on the inner circumferential surface of the stator yoke. In the radial direction of the stator yoke, the slot openings of the first and second stator slots face the center of the stator yoke. That is, the slot openings of the stator slots are oriented toward the center of the stator yoke. The depth of the first stator slot is greater than that of the second stator slot. In other words, the first and second stator slots are two different types of stator slot structures. By providing different stator slot structures, the width of the stator yoke can be increased, improving the motor's overload capacity and efficiency, thereby reducing hysteresis losses and energy loss. Furthermore, the stator slot configuration can be more flexible. Furthermore, the stator slot design with different depths can guide magnetic flux more efficiently through the stator core. This helps optimize the magnetic flux path, reduce magnetic resistance, and improve the electromagnetic conversion efficiency of the motor.

[0032] Specifically, by spacing the first stator slot and the second stator slot and controlling the depth of the first stator slot to be greater than that of the second stator slot, the impact on the overall structure of the stator core can be minimized while maintaining sufficient winding space. In addition, the stator slots spaced apart can also play a role similar to reinforcing ribs, improving the deformation resistance of the stator core. Moreover, due to the difference in depth between the first stator slot and the second stator slot and the spacing between the two, the motor has more flexibility in electromagnetic design. The size and distribution of the stator slots can be optimized according to the specific needs of the motor (such as power, efficiency, torque, etc.) to achieve optimal motor performance. It helps to reduce the harmonic content of the motor and improve the running smoothness and reliability of the motor.

[0033] In some technical solutions, optionally, the minimum distance between the bottom of the first stator slot and the outer circle of the stator yoke is B, the minimum distance between the bottom of the second stator slot and the trim structure is C, and the minimum distance between the bottom of the first stator slot and the bottom of the groove structure is F, where F≤C≤B.

[0034] In this technical solution, the minimum distance between the bottom of the first stator slot and the outer circle of the stator yoke is set to B, the minimum distance between the bottom of the second stator slot and the trim structure is set to C, and the minimum distance between the bottom of the first stator slot and the bottom of the groove structure is set to F, and the three satisfy the following relationship: F≤C≤B. By defining the relationship between the minimum distance B between the bottom of the first stator slot and the outer circle of the stator yoke, the minimum distance C between the bottom of the second stator slot and the trim structure, and the minimum distance F between the bottom of the first stator slot and the bottom of the groove structure, the design size and distribution position of the trim structure and the groove structure on the stator yoke are reasonably designed. While maximizing the width of the stator yoke, the overall width of the stator yoke is kept as uniform as possible, avoiding local narrowing of the stator yoke width. In other words, avoiding the stator yoke width "short board" that causes local magnetic flux oversaturation in the stator yoke and increases copper and iron losses, thereby improving the motor's overload capacity and efficiency.

[0035] In some technical solutions, optionally, the setting position of the second stator slot corresponds to the setting position of the trimming structure.

[0036] In this technical solution, by setting the setting position of the second stator slot to correspond to the setting position of the cutting structure, it is ensured that the outer circle of the stator core meets the condition of current flow, while the width of the stator yoke is increased to the greatest extent, and the overall width of the stator yoke is kept as uniform as possible to avoid the local width of the stator yoke from narrowing, and avoid the stator yoke width from having a "short board", causing the local magnetic flux of the stator yoke to be over-saturated and increase copper loss and iron loss, thereby improving the motor overload capacity and efficiency.

[0037] In some technical solutions, optionally, the number of the trimming structures is the same as the number of stator poles.

[0038] In this technical solution, by setting the number of cutting edge structures to be the same as the number of stator poles, it is possible to ensure that the compressor refrigerant and lubricating oil flow in the stator core through the cutting edge structures, and to minimize the number of cutting edge structures to avoid the stator yoke being too narrow, thereby reducing the motor's core loss and winding loss, and improving the motor's overload capacity and efficiency.

[0039] According to the second aspect of the present application, a stator core is also proposed, including: a stator punching sheet as in any of the above-mentioned schemes, multiple stator punching sheets are stacked to form a stator core, the groove structures on the multiple stator punching sheets are superimposed to form a stator flow slot, and a stator inner hole is formed in the stator core.

[0040] The stator core provided in the present application includes the stator punching sheets of any of the above technical solutions, and therefore has all the beneficial effects of the stator punching sheets, which will not be described in detail here.

[0041] In addition, multiple stator punching sheets are stacked to form a stator core, the groove structures on the multiple stator punching sheets are superimposed to form a stator flow slot, and a stator inner hole is formed in the stator core to facilitate the installation of the rotor core.

[0042] According to a third aspect of the present application, a motor is further proposed, comprising: a stator core as in the above solution; and a rotor core rotatably disposed in a stator inner hole of the stator core.

[0043] The motor provided in the present application includes the stator core of the above technical solution, and therefore has all the beneficial effects of the stator core, which will not be described in detail here.

[0044] In addition, the motor also includes a rotor core, which is rotatably arranged in the stator inner hole of the stator core. The rotor core is affected by the magnetic field generated by the current in the stator core, generating a rotational torque, thereby converting electrical energy into mechanical energy.

[0045] According to a fourth aspect of the present application, a compressor is also proposed, comprising: a motor as in the above solution.

[0046] The compressor provided in this application includes the motor of the above-mentioned technical solution, and therefore has all the beneficial effects of the motor, which will not be described in detail here.

[0047] According to a fifth aspect of the present application, a refrigeration device is also proposed, including: a compressor as in the above solution.

[0048] The refrigeration equipment provided in the present application includes the compressor of the above-mentioned technical solution, and therefore has all the beneficial effects of the compressor, which will not be described in detail here.

[0049] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0051] Figure 1 This is a schematic structural diagram of a stator punching sheet according to an embodiment of the present application;

[0052] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the Y portion of the stator punching sheet of the embodiment shown;

[0053] Figure 3 A comparative diagram of the motor working efficiency according to an embodiment of the present application;

[0054] Figure 4 This is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.

[0055] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0056] 100 stator punching sheet, 110 stator yoke, 120 stator teeth, 130 stator slot, 132 first stator slot, 134 second stator slot, 140 groove structure, 150 trimming structure, 200 stator core, 210 stator flow slot, 220 stator inner hole, 300 motor, 310 rotor core, 400 compressor, 500 refrigeration equipment. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0059] Refer to the following Figures 1 to 4 The stator sheet 100, the stator core 200, the motor 300, the compressor 400 and the refrigeration device 500 provided according to some embodiments of the present application are described.

[0060] like Figures 1 to 4 As shown, Figure 1 This is a schematic structural diagram of a stator punching sheet 100 according to an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the Y portion of the stator punching sheet 100 of the embodiment shown; Figure 3 A comparative diagram of the working efficiency of the motor 300 according to an embodiment of the present application; Figure 4The figure is a schematic structural diagram of a refrigeration device 500 according to an embodiment of the present application. The stator punching sheet 100 provided by an embodiment of the present application comprises: a stator yoke 110, which is a circular ring structure; a plurality of stator teeth 120, which are arranged on the inner circumferential surface of the stator yoke 110 and arranged along the circumference of the stator yoke 110, and the inner circumferential surface of the stator yoke 110 and two adjacent stator teeth 120 are surrounded to form a stator slot 130; a plurality of groove structures 140, which are arranged on the outer circumferential surface of the stator yoke 110 and arranged along the circumference of the stator yoke 110. In the radial cross section of the stator yoke 110, the bottom of the stator slot 130 is an arc with a radius of R3. The distance from the bottom of the groove structure 140 to the center of the stator yoke 110 is E. The angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ. The outer radius of the stator yoke 110 is R2. The groove depth of the groove structure 140 is L. The groove depth L of the groove structure 140 satisfies the following conditions: 0.4×R3-E×sinθ≤R2-E≤R3.

[0061] Specifically, if Figure 1 and Figure 2 As shown, the stator punching sheet 100 includes a stator yoke 110, stator teeth 120, and a groove structure 140. The stator yoke 110 is configured as an annular structure, and the stator teeth 120 are multiple. The multiple stator teeth 120 are arranged on the inner circumferential surface of the stator yoke 110 and distributed along the circumference of the stator yoke 110. The inner circumferential surface of the stator yoke 110 and two adjacent stator teeth 120 enclose a stator slot 130. The stator punching sheet 100 further includes a groove structure 140, the number of which is multiple, and the multiple groove structures 140 are arranged on the outer circumferential surface of the stator yoke 110 and distributed along the circumference of the stator yoke 110, and the groove structure 140 extends along the axial direction of the stator yoke 110. In the radial cross section of the stator yoke 110, the bottom of the stator slot 130 is an arc, that is, the bottom of the stator slot 130 is an arc-shaped bottom, and the stator slot 130 is The arc radius of the groove bottom is R3, the distance from the groove bottom of the groove structure 140 to the center of the stator yoke 110 is E, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, the outer circle radius of the stator yoke 110 is R2, the inner circle radius of the stator yoke 110 is R1, and the groove depth of the groove structure 140 is L, wherein the groove depth L of the groove structure 140 satisfies: 0.4×R3-E×sinθ≤R2-E≤R3.

[0062] Specifically, by limiting the groove depth L of the groove structure 140 to satisfy: 0.4×R3-E×sinθ≤R2-E≤R3, the design size of the groove structure 140 on the stator yoke 110 can be limited, thereby avoiding the local narrowing of the width of the stator yoke 110; while increasing the width of the stator yoke 110 to the greatest extent, the overall width of the stator yoke 110 is kept as uniform as possible to avoid the local width of the stator yoke 110 being too narrow, that is, avoiding the "short board" of the stator yoke 110 width, causing the local magnetic flux of the stator yoke 110 to be over-saturated and increase copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300, and then ensuring that the outer circle of the stator core 200 meets the current flow condition, improving the uniformity of the width of the stator yoke 110 and its magnetic field distribution, compared with the traditional scheme, the efficiency of the motor 300 can be improved by 0.6%.

[0063] Specifically, in the relevant technologies, with the advancement of technology, the requirements for compressor energy efficiency are becoming higher and higher. The single-phase induction motor has low cost. As the core component of the compressor, improving its efficiency is crucial. The rotary compressor requires refrigerant and lubricating oil to circulate up and down. Usually, a cutting structure and a groove structure are set around the outer diameter of the single-phase induction motor for the circulation of refrigerant and lubricating oil. The stator punching sheet is processed from a circular outer diameter to a multi-cutting structure or a special-shaped non-circular outer diameter. The cutting structure and the groove structure will lead to a reduction in the width of the stator yoke, an increase in the magnetic field strength, and an aggravation of the uneven distribution of the magnetic field, causing serious local saturation of the stator yoke, affecting the efficiency and maximum output capacity of the single-phase induction motor. Therefore, it is necessary to reasonably design the cutting structure and the groove structure to make the magnetic field evenly distributed and avoid local over-saturation, so as to achieve the purpose of improving the efficiency of the compressor.

[0064] Specifically, since the refrigerant and lubricating oil of the compressor 400 need to circulate in the stator core 200, it is necessary to set a cutting structure 150 and a groove structure 140 on the outer circle of the stator yoke 110. The increase of the groove structure 140 will cause the width of the stator yoke 110 to decrease. The width of the stator yoke 110 refers to the minimum distance between the bottom of the stator slot 130 and the bottom of the groove structure 140 in the radial cross-section of the stator yoke 110, or the minimum distance between the bottom of the stator slot 130 and the cutting structure 150. The width of the stator yoke 110 is mainly used to carry and conduct magnetic flux. The wider the width of the stator yoke 110, the higher the efficiency of conducting magnetic flux. Conversely, the narrower the width of the stator yoke 110, the lower the efficiency of conducting magnetic flux. The design dimensions of the cutting structure 150 and the groove structure 140 are unreasonable, resulting in a reduction in the local width of the stator yoke 110, affecting the efficiency and maximum output capacity of the motor 300.

[0065] This application addresses this issue. Figure 1 and Figure 2As shown, by setting the groove depth L of the groove structure 140 to satisfy the following: 0.4×R3-E×sinθ≤R2-E≤R3. By limiting the dimensions of the groove structure 140 on the stator yoke 110, and in particular by limiting the relationship between the groove depth L of the groove structure 140, the arc radius R3 of the bottom of the stator slot 130, the distance E from the bottom of the groove structure 140 to the center of the stator yoke 110, the angle θ between the centerline of the groove structure 140 and the centerline of the stator tooth 120, and the outer radius R2 of the stator yoke 110, it is possible to effectively avoid a sharp reduction in the local width of the stator yoke 110 at the groove structure 140, thereby reducing the problem of uneven magnetic field distribution caused by excessive local magnetic field intensity. This helps to maintain a more uniform magnetic field distribution across the entire stator yoke 110, reduce local magnetic field saturation, and improve the operating efficiency and stability of the motor 300.

[0066] By rationally designing the dimensions of the groove structure 140, the stator yoke 110 maintains sufficient overall and local strength and rigidity when subjected to high loads, preventing deformation or damage. This improves the overload capacity of the motor 300, enabling stable and efficient operation even under extreme operating conditions.

[0067] Furthermore, due to the reduced local magnetic field saturation in the stator yoke 110, the copper and iron losses of the motor 300 are also reduced. Copper loss primarily results from current loss in the stator windings, while iron loss is related to eddy current and hysteresis losses in the stator core 200. By optimizing the magnetic field distribution, unnecessary energy loss is reduced, improving the overall efficiency of the motor 300.

[0068] Moreover, if Figure 3As shown, by rationally designing the size of the groove structure 140, the heat dissipation conditions of the stator yoke 110 can be improved to a certain extent. The groove structure 140 can serve as a heat dissipation channel, promoting the flow of air or cooling medium, helping to dissipate the heat generated during the operation of the generator 300, and preventing excessive temperature from adversely affecting the performance of the motor 300. Under the premise of meeting specific performance requirements, the stator punching 100 provided in this application can further optimize the performance of the motor 300 by adjusting parameters such as the number, position, and size of the groove structure 140 to meet the specific needs of different application scenarios. The present invention solves the problems of serious local magnetic field saturation and uneven magnetic field distribution of the stator yoke in the related art. While increasing the width of the stator yoke 110 to the greatest extent, the overall width of the stator yoke 110 is kept uniform as much as possible to avoid the local width of the stator yoke 110 being too narrow, that is, to avoid the stator yoke 110 having a "short board" in the width, which causes the local magnetic flux of the stator yoke 110 to be excessively saturated and increase the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300, ensuring that the outer circle of the stator core 200 meets the condition of current flow, and improving the uniformity of the width of the stator yoke 110 and its magnetic field distribution. Compared with the traditional solution, the efficiency of the motor 300 is improved by 0.6%.

[0069] In some embodiments, optionally, as Figure 1 As shown, the outer circumferential surface of the stator yoke 110 is provided with a trimming structure 150, the number of the trimming structures 150 is M, the number of the stator slots 130 provided on the stator yoke 110 is Q, and the number of the groove structures 140 provided on the stator yoke 110 is N.

[0070]

[0071] The angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 satisfies: -1°<θ<1°; wherein M is a positive integer greater than or equal to 2, and Q is a positive integer greater than or equal to 16.

[0072] Specifically, the stator punching sheet 100 further includes a trimming structure 150, which is provided on the outer circumferential surface of the stator yoke 110. The number of trimming structures 150 is M, the number of stator slots 130 provided on the stator yoke 110 is Q, and the number of groove structures 140 provided on the stator yoke 110 is N. The number N of groove structures 140, the number M of trimming structures 150, and the number Q of stator slots 130 satisfy the following relationship:

[0073]

[0074] The angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 satisfies: -1°<θ<1°; wherein M is a positive integer greater than or equal to 2, and Q is a positive integer greater than or equal to 16.

[0075] Specifically, by limiting the relationship between the number N of the groove structures 140 and the number M of the trimming structures 150, as well as the number Q of the stator slots 130, the number of the groove structures 140 can be optimized. By optimizing the number of the groove structures 140, the groove structures 140 are reasonably distributed on the stator punching sheet 100. At the same time, by limiting the range of the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120, the setting position of the groove structure 140 on the stator yoke 110 can be optimized. By optimizing the groove structure The arrangement position of the structure 140 enables the groove structure 140 to be reasonably distributed on the stator punching sheet 100, ensuring that the outer circle of the stator core 200 meets the condition of current flow, while maximizing the width of the stator yoke 110 and keeping the overall width of the stator yoke 110 as uniform as possible, avoiding the local width of the stator yoke 110 from narrowing, avoiding the "short board" of the width of the stator yoke 110, causing the local magnetic flux of the stator yoke 110 to be over-saturated and increase the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0076] Specifically, the number Q of the stator slots 130 can be set to 16, 20, 24, 36 or 48, etc., and the number of the trimming structures 150 can be set to 2, 4, 6, 8 or 10, etc. Figure 1 As shown, the number Q of the stator slots 130 is set to 24, the number of the trimming structures 150 is set to 2, and the number of the groove structures 140 is set to 10. Those skilled in the art can set it according to actual needs. By limiting the number of the stator slots 130 and the trimming structures 150, the number of the groove structures 140 can be calculated, so that the number of the groove structures 140 on the stator yoke 110 can be optimized. By optimizing the number of the groove structures 140, the groove structures 140 are reasonably distributed on the stator punching 100, ensuring that the outer circle of the stator core 200 meets the flow condition, while maximizing the width of the stator yoke 110, the overall width of the stator yoke 110 is kept uniform, avoiding the local width of the stator yoke 110 from becoming narrow, avoiding the stator yoke 110 from having a "short board" in the width, causing the local magnetic flux of the stator yoke 110 to be oversaturated and increasing the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0077] Specifically, the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 can be set to -0.8°, -0.5°, -0.2°, -0.1°, 0°, 0.1°, 0.2°, 0.5°, 0.8°, etc., and those skilled in the art can set it according to actual needs. By limiting the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120, the setting position of the groove structure 140 on the stator yoke 110 can be optimized. By optimizing the groove The arrangement position of the slot structure 140 allows the groove structure 140 to be reasonably distributed on the stator punching sheet 100, ensuring that the outer circle of the stator core 200 meets the condition of flow, while maximizing the width of the stator yoke 110 and keeping the overall width of the stator yoke 110 as uniform as possible, avoiding the local width of the stator yoke 110 being too narrow, and avoiding the stator yoke 110 having a "short board" in the width, causing the local magnetic flux of the stator yoke 110 to be over-saturated and increase copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0078] In some embodiments, optionally, in a radial cross section of the stator yoke 110 , the notch of the groove structure 140 faces the outer circle of the stator yoke 110 , the groove bottom of the groove structure 140 is set as a straight line segment, the groove bottom width of the groove structure 140 is D, and the tooth width of the stator tooth 120 is A, wherein,

[0079]

[0080] Specifically, if Figure 1 and Figure 2 As shown, in the radial cross section of the stator yoke 110, that is, in the cross section perpendicular to the axis of the stator yoke 110, the notch of the groove structure 140 faces the outer circle direction of the stator yoke 110, that is, the opening of the groove structure 140 faces the outer circle direction of the stator yoke 110, and the groove bottom of the groove structure 140 is set as a straight line segment, that is, the groove bottom of the groove structure 140 is a straight line groove bottom, the groove bottom width of the groove structure 140 is D, and the tooth width of the stator tooth 120 is A, wherein,

[0081]

[0082] By setting the range relationship between the groove bottom width D of the groove structure 140 and the tooth width A of the stator tooth 120, the design size of the groove structure 140 on the stator yoke 110 can be optimized, so that the groove structure 140 is reasonably designed and distributed on the stator punching 100, ensuring that the outer circle of the stator core 200 meets the condition of flow, and the width of the stator yoke 110 is increased to the greatest extent. At the same time, the overall width of the stator yoke 110 is kept uniform as much as possible to avoid the local width of the stator yoke 110 being too narrow, that is, to avoid the stator yoke 110 having a "short board" in the width, resulting in excessive saturation of the local magnetic flux of the stator yoke 110 and increased copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0083] Specifically, the ratio between the groove bottom width D of the groove structure 140 and the tooth width A of the stator tooth 120 can be set to 0.8, 0.9, 1, etc., and those skilled in the art can set it according to actual needs. By limiting the ratio range between the groove bottom width D of the groove structure 140 and the tooth width A of the stator tooth 120, the design size of the groove structure 140 on the stator yoke 110 can be optimized, so that the groove structure 140 is reasonably designed and distributed on the stator punching 100, ensuring that the outer circle of the stator core 200 meets the condition of flow, and the width of the stator yoke 110 is increased to the greatest extent. At the same time, the overall width of the stator yoke 110 is kept uniform as much as possible to avoid the local width of the stator yoke 110 from narrowing, that is, to avoid the "short board" of the width of the stator yoke 110, causing the local magnetic flux of the stator yoke 110 to be over-saturated and increase the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0084] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, in the radial cross section of the stator yoke 110 , the slot width of the slot structure 140 is H, and the slot width H of the slot structure 140 satisfies:

[0085]

[0086] Specifically, if Figure 1 and Figure 2 As shown, in the radial cross section of the stator yoke 110 , that is, in the cross section perpendicular to the axis of the stator yoke 110 , the slot width of the groove structure 140 is H. The slot width H of the groove structure 140 satisfies:

[0087]

[0088] By setting the range relationship between the slot width H of the slot structure 140 and the tooth width A of the stator tooth 120 and the slot bottom arc radius R3 of the stator slot 130, the design size of the slot structure 140 in the stator yoke 110 can be optimized, especially by limiting the width range of the slot in the slot structure 140, so that the slot structure 140 is reasonably designed and distributed on the stator punching 100, ensuring that the outer circle of the stator core 200 meets the condition of flow, and the width of the stator yoke 110 is increased to the greatest extent. At the same time, the overall width of the stator yoke 110 is kept uniform as much as possible to avoid the local width of the stator yoke 110 being too narrow, that is, to avoid the stator yoke 110 having a "short board" in the width, resulting in excessive saturation of the local magnetic flux of the stator yoke 110 and increased copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0089] Specifically, the ratio of the slot width H of the groove structure 140 to the tooth width A of the stator tooth 120 and the slot bottom arc radius R3 of the stator slot 130 can be set to 0.9, 0.95 or 1, etc., and those skilled in the art can set it according to actual needs. By limiting the ratio range of the slot width H of the groove structure 140 to the tooth width A of the stator tooth 120 and the slot bottom arc radius R3 of the stator slot 130, the design size of the groove structure 140 in the stator yoke 110 can be optimized, especially by limiting the ratio of the slot width H of the groove structure 140 to the tooth width A of the stator tooth 120 and the slot bottom arc radius R3 of the stator slot 130. The width range of the slot allows the groove structure 140 to be reasonably designed and distributed on the stator punching sheet 100, ensuring that the outer circle of the stator core 200 meets the flow condition, while maximizing the width of the stator yoke 110 and keeping the overall width of the stator yoke 110 as uniform as possible, avoiding the local width of the stator yoke 110 being too narrow, that is, avoiding the "short board" in the width of the stator yoke 110, causing the local magnetic flux of the stator yoke 110 to be over-saturated and increase copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0090] In some embodiments, optionally, as Figure 1 As shown, the stator slot 130 includes a first stator slot 132 and a second stator slot 134, and a plurality of first stator slots 132 and a plurality of second stator slots 134 are alternately arranged on the inner circumferential surface of the stator yoke 110, wherein, along the radial direction of the stator yoke 110, the slot openings of the first stator slot 132 and the second stator slot 134 are toward the center of the stator yoke 110, and the depth of the first stator slot 132 is greater than the depth of the second stator slot 134.

[0091] Specifically, if Figure 1As shown, the stator slots 130 include a first stator slot 132 and a second stator slot 134. A plurality of first stator slots 132 and a plurality of second stator slots 134 are spaced apart on the inner circumferential surface of the stator yoke 110. In the radial direction of the stator yoke 110, the slot openings of the first stator slots 132 and the second stator slots 134 face the center of the stator yoke 110, that is, the slot openings of the stator slots 130 face the center of the stator yoke 110. The depth of the first stator slots 132 is greater than the depth of the second stator slots 134, and the distance K between the bottoms of the first stator slots 132 and the bottoms of the second stator slots 134 is. That is, the first stator slot 132 and the second stator slot 134 are two different types of stator slot 130 structures. By providing different types of stator slot 130 structures, on the one hand, the width of the stator yoke 110 can be increased, improving the overload capacity and efficiency of the motor 300, thereby reducing the hysteresis loss of the motor 300 and reducing energy loss. On the other hand, the flexibility of the stator slot 130 configuration can be improved. In addition, the design of stator slots 130 of different depths can guide the magnetic flux through the stator core 200 more efficiently. This helps to optimize the magnetic flux path, reduce magnetic resistance, and improve the electromagnetic conversion efficiency of the motor 300.

[0092] Specifically, by spacing the first stator slot 132 and the second stator slot 134 and controlling the depth of the first stator slot 132 to be greater than that of the second stator slot 134, the impact on the overall structure of the stator core 200 can be minimized while maintaining sufficient winding space. In addition, the stator slots 130 spaced apart can also play a role similar to reinforcing ribs, improving the deformation resistance of the stator core 200. Moreover, due to the depth difference between the first stator slot 132 and the second stator slot 134 and the spacing between the two, the motor 300 has more flexibility in electromagnetic design. The size and distribution of the stator slots 130 can be optimized according to the specific requirements of the motor 300 (such as power, efficiency, torque, etc.) to achieve the best performance of the motor 300. It helps to reduce the harmonic content of the motor 300 and improve the running smoothness and reliability of the motor 300.

[0093] Specifically, if Figure 1 As shown, a plurality of first stator slots 132 and a plurality of second stator slots 134 are arranged at intervals on the inner circumferential surface of the stator yoke 110. It can be understood that a first stator slot 132 and a second stator slot 134 are arranged alternately, or a plurality of first stator slots 132 and a second stator slot 134 are arranged alternately, or a first stator slot 132 and a plurality of second stator slots 134 are arranged alternately. The alternating and interval arrangement of the first stator slots 132 and the second stator slots 134 can be arranged according to actual needs, and is not limited here. Figure 1As shown, the present application specifically arranges 20 first stator slots 132 with 4 second stator slots 134 between them, and the second stator slots 134 are arranged in groups of 2, spaced apart between the 20 first stator slots 132. By adopting a design scheme in which the first stator slots 132 and the second stator slots 134 are alternately arranged, and the depth of the first stator slots 132 is greater than the depth of the second stator slots 134, beneficial technical effects are achieved in terms of optimizing magnetic field distribution, improving heat dissipation performance, enhancing mechanical strength, optimizing winding arrangement, reducing noise and vibration, and improving design flexibility.

[0094] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the minimum distance between the bottom of the first stator slot 132 and the outer circle of the stator yoke 110 is B, the minimum distance between the bottom of the second stator slot 134 and the trimming structure 150 is C, and the minimum distance between the bottom of the first stator slot 132 and the bottom of the groove structure 140 is F, where F≤C≤B.

[0095] Specifically, if Figure 1 and Figure 2 As shown, by setting the minimum distance between the bottom of the first stator slot 132 and the outer circle of the stator yoke 110 to B, the minimum distance between the bottom of the second stator slot 134 and the trimming structure 150 to C, and the minimum distance between the bottom of the first stator slot 132 and the bottom of the groove structure 140 to F, the three satisfy: F≤C≤B. By limiting the relationship between the minimum distance B between the bottom of the first stator slot 132 and the outer circle of the stator yoke 110, the minimum distance C between the bottom of the second stator slot 134 and the trimming structure 150, and the minimum distance F between the bottom of the first stator slot 132 and the bottom of the groove structure 140, the design dimensions and distribution positions of the trimming structure 150 and the groove structure 140 on the stator yoke 110 can be reasonably designed. While maximizing the width of the stator yoke 110, the overall width of the stator yoke 110 is kept as uniform as possible, avoiding the local width of the stator yoke 110 being too narrow, that is, avoiding the stator yoke 110 having a "short board" in the width, causing excessive saturation of the local magnetic flux of the stator yoke 110 and increasing copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0096] In some embodiments, optionally, as Figure 1 As shown, the arrangement position of the second stator slot 134 corresponds to the arrangement position of the trimming structure 150 .

[0097] Specifically, if Figure 1As shown, by setting the setting position of the second stator slot 134 to correspond to the setting position of the cutting structure 150, it is ensured that the outer circle of the stator core 200 meets the condition of current flow, while the width of the stator yoke 110 is increased to the greatest extent, and the overall width of the stator yoke 110 is kept as uniform as possible to avoid the local width of the stator yoke 110 being too narrow, and to avoid the stator yoke 110 having a "short board" in the width, which causes the local magnetic flux of the stator yoke 110 to be over-saturated and increase the copper loss and iron loss, thereby improving the overload capacity and efficiency of the motor 300.

[0098] Specifically, the trimmed edge structure 150 can modify the local magnetic field distribution within the stator yoke 110 to optimize electromagnetic performance. Aligning the second stator slots 134 with the trimmed edge structure 150 can make the magnetic field distribution within the second stator slots 134 more uniform, reducing localized magnetic flux concentration and magnetic flux leakage, thereby improving the electromagnetic efficiency and output power of the motor 300.

[0099] In addition, the trim structure 150 enhances the mechanical strength of the stator yoke 110, reduces stress concentration, and optimizes electromagnetic performance. Aligning the position of the second stator slot 134 with the trim structure 150 further leverages the support provided by the trim structure 150 to enhance the stability of the second stator slot 134 and its surrounding area. This helps reduce structural deformation and vibration caused by the stator slot 130, improving the overall operational smoothness of the motor 300. The trim structure 150 also serves as a heat dissipation channel, promoting heat dissipation within the stator. When the second stator slot 134 aligns with the trim structure 150, the trim structure 150 can be used as an additional heat dissipation path to more effectively dissipate heat within the second stator slot 134, reducing the temperature rise during operation of the motor 300 and improving the thermal stability and lifespan of the motor 300. Furthermore, by aligning the second stator slot 134 with the trim structure 150, the position and dimensions of the second stator slot 134 and the trim structure 150 within the motor 300 are maintained consistent.

[0100] In some embodiments, optionally, as Figure 1 As shown, the number of the cut edge structures 150 is the same as the number of stator poles.

[0101] Specifically, if Figure 1 As shown, by setting the number of cutting structures 150 to be the same as the number of stator poles, it is possible to ensure that the refrigerant and lubricating oil of the compressor 400 flow in the stator core 200 through the cutting structures 150, and to minimize the number of cutting structures 150 to avoid the width of the stator yoke 110 being too narrow, thereby reducing the core loss and winding loss of the motor 300 and improving the overload capacity and efficiency of the motor 300.

[0102] Specifically, if Figure 1As shown, in the present application, the number of poles of the motor 300 is 2, and the number of the cutting structures 150 is set to 2. In this way, it can ensure that the refrigerant and lubricating oil of the compressor 400 flow in the stator core 200 through the cutting structure 150, and can also minimize the number of cutting structures 150 to the greatest extent, avoid the width of the stator yoke 110 being too narrow, thereby reducing the core loss and winding loss of the motor 300, and improving the overload capacity and efficiency of the motor 300.

[0103] According to the second aspect of this application, Figure 4 As shown, a stator core 200 is also proposed, including: a stator punching sheet 100 as in any of the above embodiments, a plurality of stator punching sheets 100 are stacked to form the stator core 200, the groove structures 140 on the plurality of stator punching sheets 100 are stacked to form a stator flow slot 210, and a stator inner hole 220 is formed in the stator core 200.

[0104] The stator core 200 provided in the present application includes the stator punching sheet 100 of any of the above embodiments, and thus has all the beneficial effects of the stator punching sheet 100 , which will not be described in detail here.

[0105] In addition, if Figure 4 As shown, multiple stator punching sheets 100 are stacked to form a stator core 200 , the groove structures 140 on the multiple stator punching sheets 100 are stacked to form a stator flow slot 210 , and a stator inner hole 220 is formed in the stator core 200 to facilitate the installation of the rotor core 310 .

[0106] According to the third aspect of this application, Figure 4 As shown, a motor 300 is also proposed, comprising: the stator core 200 as in the above embodiment; and a rotor core 310 rotatably disposed in the stator inner hole 220 of the stator core 200 .

[0107] The motor 300 provided in the present application includes the stator core 200 of the above embodiment and thus has all the beneficial effects of the stator core 200 , which will not be described in detail here.

[0108] In addition, if Figure 4 As shown, the motor 300 further includes a rotor core 310, which is rotatably disposed within the stator inner bore 220 of the stator core 200. The rotor core 310 is subjected to the magnetic field generated by the current in the stator core 200, generating a rotational torque, thereby converting electrical energy into mechanical energy. Specifically, the motor 300 is a single-phase induction motor.

[0109] According to the fourth aspect of this application, Figure 4 As shown, a compressor 400 is also proposed, comprising: the motor 300 as in the above embodiment.

[0110] The compressor 400 provided in this application includes the motor 300 of the above embodiment, and thus has all the beneficial effects of the motor 300, which will not be described in detail here. Specifically, the compressor 400 can be specifically configured as a rotary compressor.

[0111] According to the fifth aspect of this application, Figure 4 As shown, a refrigeration device 500 is also proposed, including: the compressor 400 as in the above embodiment.

[0112] The refrigeration device 500 provided in the present application includes the compressor 400 of the above embodiment and thus has all the beneficial effects of the compressor 400, which will not be described in detail here.

[0113] In the description of this application, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. The terms "connection", "installation", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0114] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0115] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A stator punching sheet, characterized in that: include: A stator yoke, wherein the stator yoke is a circular ring structure; A plurality of stator teeth are provided on the inner circumferential surface of the stator yoke and arranged along the circumference of the stator yoke, wherein the inner circumferential surface of the stator yoke and two adjacent stator teeth form a stator slot; Multiple groove structures are arranged on the outer circumferential surface of the stator yoke and distributed along the circumference of the stator yoke. In the radial cross-section of the stator yoke, the bottom of the stator slot is an arc with a radius of R3. The distance from the bottom of the groove structure to the center of the stator yoke is E. The angle between the center line of the groove structure and the center line of the stator tooth is θ. The outer radius of the stator yoke is R2. The groove depth of the groove structure is L, wherein the groove depth L of the groove structure satisfies: 0.4×R3-E×sinθ≤R2-E≤R3.

2. The stator sheet according to claim 1, characterized in that: The outer circumferential surface of the stator yoke is provided with a trimming structure, the number of the trimming structures is M, the number of the stator slots provided on the stator yoke is Q, and the number of the groove structures provided on the stator yoke is N. And the angle θ between the center line of the groove structure and the center line of the stator tooth satisfies: -1°<θ<1°; wherein M is a positive integer greater than or equal to 2, and Q is a positive integer greater than or equal to 16.

3. The stator sheet according to claim 1, characterized in that: In the radial cross section of the stator yoke, the notch of the groove structure faces the outer circle of the stator yoke, the groove bottom of the groove structure is set as a straight line segment, the groove bottom width of the groove structure is D, and the tooth width of the stator tooth is A, wherein, 4. The stator sheet according to claim 3, characterized in that: In the radial cross section of the stator yoke, the slot width of the slot structure is H, and the slot width H of the slot structure satisfies:

5. The stator sheet according to claim 2, characterized in that: The stator slots include a first stator slot and a second stator slot, and a plurality of the first stator slots and a plurality of the second stator slots are alternately arranged on the inner circumferential surface of the stator yoke, wherein, along the radial direction of the stator yoke, the slot openings of the first stator slots and the second stator slots are facing the center direction of the stator yoke, and the depth of the first stator slot is greater than the depth of the second stator slot.

6. The stator punching sheet according to claim 5, characterized in that: The minimum distance between the bottom of the first stator slot and the outer circle of the stator yoke is B, the minimum distance between the bottom of the second stator slot and the trimming structure is C, and the minimum distance between the bottom of the first stator slot and the bottom of the groove structure is F, where F≤C≤B.

7. The stator sheet according to claim 5, characterized in that: The second stator slot is arranged at a position corresponding to the trimming structure.

8. The stator lamination according to any one of claims 5 to 7, characterized in that: The number of the edge cutting structures is the same as the number of stator poles.

9. A stator core, characterized in that: It comprises the stator punching sheet according to any one of claims 1 to 8, wherein a plurality of the stator punching sheets are stacked to form the stator core, the groove structures on the plurality of the stator punching sheets are stacked to form a stator flow slot, and a stator inner hole is formed in the stator core.

10. A motor, characterized in that: The motor comprises the stator core according to claim 9; The rotor core is rotatably arranged in the stator inner hole of the stator core.

11. A compressor, characterized in that: Comprising the motor as claimed in claim 10.

12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.

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