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 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, the inner circumferential surface of the stator yoke part and two adjacent stator teeth are encircled to form a stator groove, the stator punching sheet is provided with Q stator grooves and groove structures, the number of the groove structures is multiple, the multiple groove structures are arranged on the outer circumferential surface of the stator yoke part, and Q is a positive integer. The groove structures are distributed in the circumferential direction of the stator yoke part, in the radial cross section of the stator yoke part, the included angle between the center line of each groove structure and the center line of each stator tooth is theta, the relation between the number Q of the stator grooves and the included angle theta meets # imgabs0 #, and any groove structure is asymmetrically arranged on the outer circumferential surface of the stator yoke part relative to the opposite diameter point of the groove structure; the width of the stator yoke part is increased, 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 current 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 increase of cut edges and grooves on the outer circle of the stator yoke will cause the width of the stator yoke to decrease. Under high load conditions, the magnetic field of the stator yoke of the motor is easily saturated, limiting the improvement of the motor efficiency and overload capacity. Utility Model Content

[0003] The present application aims to at least solve the technical problem in related technologies or related technologies that adding cutting edge structures and groove structures to the outer circle of the stator yoke causes the stator yoke width to become narrower, the magnetic field is easily saturated, and the motor efficiency is reduced.

[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, comprising: a stator yoke, which is a circular ring-shaped structure; a plurality of stator teeth, which are arranged on the inner circumferential surface of the stator yoke and arranged along the circumference of the stator yoke, the inner circumferential surface of the stator yoke and two adjacent stator teeth forming a stator slot, and the stator punching sheet is provided with Q stator slots, wherein Q is a positive integer greater than or equal to 2; a groove structure, wherein the number of groove structures is multiple, the plurality of groove structures are arranged on the outer circumferential surface of the stator yoke and distributed along the circumference of the stator yoke, in a radial cross-section of the stator yoke, the angle between the center line of the groove structure and the center line of the stator tooth is θ, and the relationship between the number of stator slots Q and the angle θ satisfies:

[0010]

[0011] Moreover, any groove structure is asymmetrically arranged relative to its own diametric point on the outer circumferential surface of the stator yoke.

[0012] The stator lamination provided in this application includes a stator yoke, stator teeth, and a groove structure. The stator yoke is configured as an annular structure, and the stator teeth are multiple. The multiple stator teeth are arranged 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 lamination is provided with Q stator slots, where Q is a positive integer greater than or equal to 2.

[0013] The stator punching sheet is provided with 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. The groove structures extend along the axial direction of the stator yoke. In the radial cross section of the stator yoke, the angle between the center line of the groove structure and the center line of the stator tooth is θ. The relationship between the number of stator slots Q and the angle θ satisfies:

[0014]

[0015] Moreover, any groove structure is asymmetrically arranged on the outer circumferential surface of the stator yoke relative to its own radial point.

[0016] Specifically, the present application sets the angle θ between the center line of the groove structure and the center line of the stator tooth in the radial cross section of the stator yoke, and the relationship between the number of stator slots Q and the angle θ satisfies:

[0017]

[0018] Each groove structure is asymmetrically positioned on the outer circumference of the stator yoke relative to its own radial point. This maximizes the width of the stator yoke, thereby improving the motor's overload capacity and efficiency, reducing the excitation current, lowering winding losses, and simultaneously reducing iron and copper losses.

[0019] The stator punching sheet according to the above technical solution of the present application may also have the following additional technical features:

[0020] In some technical solutions, optionally, an angle θ between a center line of the groove structure and a center line of the stator tooth satisfies: 0<θ≤1°.

[0021] In this technical solution, the angle θ between the center line of the groove structure and the center line of the stator tooth is set to satisfy: 0<θ≤1°. In this way, by limiting the range of the angle θ between the center line of the groove structure and the center line of the stator tooth, the groove structure and the stator slot are staggered, that is, the groove bottom of the groove structure and the groove bottom of the stator slot are prevented from being on the same diameter line or center line. In this way, it can be ensured that the groove depth of the groove structure and the groove depth of the stator slot are not set relative to each other, and the width of the stator yoke is ensured not to be narrowed. The width of the stator yoke is increased as much as possible, and the load-bearing and magnetic flux conduction efficiency of the stator yoke is improved, thereby improving the overload capacity and efficiency of the motor, reducing hysteresis loss, and reducing energy loss.

[0022] In some technical solutions, optionally, an angle θ between a center line of the groove structure and a center line of the stator tooth satisfies: θ=0°.

[0023] In this technical solution, the angle θ between the center line of the groove structure and the center line of the stator tooth is set to satisfy: θ = 0°. In this way, by limiting the center line of the groove structure to coincide with the center line of the stator tooth, the groove structure and the stator slot can be staggered, that is, the bottom of the groove structure and the bottom of the stator slot are prevented from being on the same diameter line or center line. In this way, the groove depth of the groove structure and the groove depth of the stator slot are not set relative to each other, ensuring that the width of the stator yoke is maximized, the width of the stator yoke is maximized, and the stator yoke load-bearing and magnetic flux conduction efficiency is improved, thereby improving the motor overload capacity and efficiency, reducing hysteresis loss, and reducing energy loss.

[0024] In some technical solutions, optionally, the groove structure includes: a first groove and a second groove, the number of the first groove and the second groove is multiple, the multiple first grooves and the multiple second grooves are alternately arranged on the outer circumferential surface of the stator yoke, and in the radial cross-section of the stator yoke, the second groove is located in the center line direction of the first groove.

[0025] In this technical solution, the groove structure includes a first groove and a second groove. There are multiple first grooves and second grooves, and the multiple first grooves and the multiple second grooves are alternately and spaced apart on the outer circumferential surface of the stator yoke. In addition, in the radial cross section of the stator yoke, the second groove is located in the center line direction of the first groove. In other words, the second groove is arranged in the center line direction of the first groove, or it can be understood that the second groove is arranged on the opposite diameter point of the first groove. In this way, it is possible to ensure that different groove structures are arranged at both ends of the center line or diameter line of a groove structure, thereby increasing the width of the stator yoke and avoiding the narrowing of the width of the stator yoke due to the same type of groove structure being arranged at both ends of the center line or diameter line of the groove structure, thereby improving the overload capacity and efficiency of the motor, thereby reducing the hysteresis loss of the motor and reducing energy loss.

[0026] In some technical solutions, optionally, along the circumference of the stator yoke, the width of the first groove is greater than the width of the second groove, and along the radial direction of the stator yoke, the depth of the first groove is greater than the depth of the second groove.

[0027] In this technical solution, along the circumference of the stator yoke, the width of the first groove is greater than the width of the second groove, and along the radial direction of the stator yoke, the depth of the first groove is greater than the depth of the second groove. That is, the first groove and the second groove are two different types of groove structures. By providing different types of groove structures, on the one hand, it is possible to ensure that different groove structures are provided at both ends of the center line or diameter line of a groove structure, thereby increasing the width of the stator yoke and avoiding the situation where the same type of groove structure is provided at both ends of the center line or diameter line of the groove structure, resulting in a narrowing of the stator yoke width. This in turn improves the motor's overload capacity and efficiency, thereby reducing the motor's hysteresis loss and energy loss. On the other hand, it can ensure that the compressor refrigerant and lubricating oil can circulate within the stator core.

[0028] In some technical solutions, optionally, a trimming structure is provided on the outer circumferential surface of the stator yoke, and the number of the trimming structures is the same as the number of stator poles.

[0029] In this technical solution, the stator laminations also include trimming structures, namely, trimming structures are provided on the outer circumference of the stator yoke. Furthermore, the number of trimming structures is equal to the number of stator poles. This ensures that the compressor refrigerant and lubricating oil flow through the trimming structures within the stator core while minimizing the number of trimming structures, preventing the stator yoke from narrowing. This improves the motor's overload capacity and efficiency, thereby reducing the motor's hysteresis losses and energy loss.

[0030] In some technical solutions, optionally, in a radial cross section of the stator yoke, the first grooves and the second grooves are distributed in the same number on both sides of the center line of the trimming structure.

[0031] In this technical solution, the first and second grooves are arranged in equal numbers within the radial cross-section of the stator yoke, on either side of the centerline of the trim structure. The symmetrical distribution of the first and second grooves effectively balances the magnetic field strength on both sides of the stator yoke, reducing magnetic field distortion and thus avoiding excessive magnetic field concentration or weakening in specific areas. This balanced magnetic field distribution helps improve the overall operating efficiency of the motor, especially under high load conditions, by more effectively resisting magnetic field saturation and increasing the motor's output capacity.

[0032] 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 arranged at intervals on the inner circumferential surface of the stator yoke, wherein, along the radial direction of the stator yoke, the depth of the first stator slot is less than the depth of the second stator slot.

[0033] 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, wherein the depth of the first stator slot is less than the depth of the second stator slot along the radial direction of the stator yoke. That is, the first stator slot and the second stator slot are two different types of stator slot structures. By setting different types of stator slot structures, on the one hand, the width of the stator yoke can be increased, the overload capacity and efficiency of the motor can be improved, thereby reducing the hysteresis loss of the motor and reducing energy loss. On the other hand, the flexibility of the stator slot setting can be improved. In addition, the design of stator slots of different depths can guide the magnetic flux through the stator core more efficiently. This design helps to optimize the magnetic flux path, reduce magnetic resistance, and improve the electromagnetic conversion efficiency of the motor.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] According to a fourth aspect of the present application, a compressor is also proposed, comprising: a motor as in the above solution.

[0041] 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.

[0042] According to a fifth aspect of the present application, a refrigeration device is also proposed, including: a compressor as in the above solution.

[0043] 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.

[0044] 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

[0045] 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:

[0046] Figure 1 This is a schematic structural diagram of a stator punching sheet according to an embodiment of the present application;

[0047] Figure 2 This is a schematic structural diagram of a stator punching sheet according to another embodiment of the present application;

[0048] Figure 3 A comparative diagram of the motor working efficiency according to an embodiment of the present application;

[0049] Figure 4 This is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.

[0050] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0051] 100 stator punching sheet, 110 stator yoke, 120 stator teeth, 130 stator slot, 132 first stator slot, 134 second stator slot, 140 groove structure, 142 first groove, 144 second groove, 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

[0052] 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.

[0053] 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.

[0054] Refer to the following Figures 1 to 4The 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.

[0055] 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 This is a schematic structural diagram of a stator punching sheet 100 according to another embodiment of the present application; Figure 3 A comparative diagram of the working efficiency of the motor 300 according to an embodiment of the present application; Figure 4 The schematic diagram of the structure of a refrigeration device according to an embodiment of the present application is shown. A stator punching sheet 100 provided by an embodiment of the present application includes: 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, the inner circumferential surface of the stator yoke 110 and two adjacent stator teeth 120 are surrounded to form a stator slot 130, and the stator punching sheet 100 is provided with Q stator slots 130, wherein Q is a positive integer greater than or equal to 2; a groove structure 140, wherein the number of the groove structures 140 is multiple, and the plurality of 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, in the radial cross section of the stator yoke 110, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, and the relationship between the number Q of the stator slots 130 and the angle θ satisfies:

[0056]

[0057] Furthermore, any groove structure 140 is asymmetrically arranged relative to its own diametric point on the outer circumferential surface of the stator yoke 110 .

[0058] 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 is provided with Q stator slots 130, where Q is a positive integer greater than or equal to 2.

[0059] The stator punching sheet 100 is provided with a plurality of groove structures 140. The plurality of groove structures 140 are arranged on the outer circumferential surface of the stator yoke 110 and are distributed along the circumference of the stator yoke 110. The groove structures 140 extend along the axial direction of the stator yoke 110. In the radial cross section of the stator yoke 110, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ. The relationship between the number Q of the stator slots 130 and the angle θ satisfies:

[0060]

[0061] Furthermore, any groove structure 140 is asymmetrically arranged on the outer circumferential surface of the stator yoke 110 relative to its own radial point.

[0062] 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 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 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. Under high load conditions, the width of the stator yoke 110 becomes narrower, and the magnetic field of the stator yoke 110 of the motor 300 is easily saturated, which will limit the improvement of the efficiency and overload capacity of the motor 300.

[0063] This application addresses this issue. Figure 1 As shown, by being arranged in the radial cross section of the stator yoke 110, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, and the relationship between the number Q of the stator slots 130 and the angle θ satisfies:

[0064]

[0065] Specifically, the present application limits the range of the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120, so that the groove structure 140 and the stator slot 130 are staggered, that is, the groove bottom of the groove structure 140 and the groove bottom of the stator slot 130 are avoided to be on the same diameter line or center line. In this way, it can be ensured that the groove depth of the groove structure 140 and the groove depth of the stator slot 130 are not set relative to each other, and the width of the stator yoke 110 is not narrowed, so that the width of the stator yoke 110 is maximized, thereby improving the overload capacity and efficiency of the motor 300.

[0066] Specifically, the number Q of the stator slots 130 can be set to 12, 24, 36, 48 or 96, etc., and those skilled in the art can set it according to actual needs. By limiting the number of stator slots 130, the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 can be calculated, so as to ensure that the groove structure 140 and the stator slot 130 can be offset by a certain angle, that is, the groove structure 140 and the stator slot 130 are staggered, that is, the groove depth of the groove structure 140 and the groove depth of the stator slot 130 are not set relative to each other, and the width of the stator yoke 110 is ensured not to be narrowed, and the width of the stator yoke 110 is increased as much as possible, thereby improving the load-bearing and conduction efficiency of the stator yoke 110, thereby improving the overload capacity and efficiency of the motor 300, reducing the excitation constant current, reducing the winding loss, and reducing the iron loss or copper loss at the same time.

[0067] Specifically, if Figure 1 As shown, the present application sets any groove structure 140 on the outer circumferential surface of the stator yoke 110, asymmetrically relative to the diametrical point of the groove structure 140 itself, wherein the diametrical point refers to the two end points of the same diameter of a circular surface or a spherical surface, also called the radial relative point or the center point, and the diametrical point of the groove structure 140 itself refers to the two end points on a diameter line of the groove structure 140 in the radial cross-section of the stator yoke 110. It can be understood that any groove structure 140 of the present application is asymmetrically set on the outer circumferential surface of the stator yoke 110 relative to the diametrical point of the groove structure 140 itself, that is, any groove structure 140 is not symmetrically set on the same diameter line or the center line of the groove structure 140. It can also be understood that: the center lines of any two identical groove structures 140 do not coincide, or any groove structure 140 is set in an asymmetrical manner in the direction of the center line of the groove structure 140 itself. That is to say, the groove structure 140 of the present application may include the same type of groove structure 140 or different types of groove structures 140, and the same type of groove structure 140 is only arranged on one side of the center line passing through the center of the circle, and the same type of groove structure 140 is not arranged on the other side of the center line, or the groove structure 140 is not arranged on the other side of the center line of the groove structure 140, that is, there is no identical groove structure 140 at an angle of 180°±θ different from the same groove structure 140. In this way, it can be ensured that any two identical type of groove structures 140 are not arranged relative to each other on the same center line, so that any two identical type of groove structures 140 are staggered on the same center line, thereby maximizing the width of the stator yoke 110, and avoiding the situation where the same type of groove structures 140 are arranged at both ends of the center line or diameter line of the groove structure 140, resulting in the narrowing of the width of the stator yoke 110, thereby improving the overload capacity and efficiency of the motor 300.

[0068] Alternatively, different groove structures 140 may be provided at both ends of a center line or diameter line of a groove structure 140. This may also achieve the goal of maximizing the width of the stator yoke 110 and avoid providing the same type of groove structure 140 at both ends of the center line or diameter line of the groove structure 140, which would result in the width of the stator yoke 110 becoming narrower, thereby improving the overload capacity and efficiency of the motor 300.

[0069] Specifically, if Figure 1 and Figure 3 As shown, in the present application, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, and the relationship between the number Q of the stator slots 130 and the angle θ satisfies:

[0070]

[0071] Furthermore, any groove structure 140 is asymmetrically disposed on the outer circumferential surface of the stator yoke 110 relative to its own diametrical point. This maximizes the width of the stator yoke 110, thereby improving the overload capacity and efficiency of the motor 300, reducing the excitation constant current, reducing winding losses, and simultaneously reducing iron loss and copper loss.

[0072] Specifically, if Figure 3 As shown, by comparing the schematic diagrams, it can be seen that by being arranged in the radial cross section of the stator yoke 110, the angle between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, and the relationship between the number Q of the stator slots 130 and the angle θ satisfies:

[0073]

[0074] Moreover, any groove structure 140 is asymmetrically arranged on the outer circumferential surface of the stator yoke 110 relative to its own radial point, thereby reducing overall magnetic saturation, reducing iron loss and winding loss, and improving efficiency by 0.3%.

[0075] In some embodiments, optionally, as Figure 1 As shown, the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 satisfies: 0<θ≤1°.

[0076] Specifically, by setting the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 to satisfy: 0<θ≤1°, thus, 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 groove structure 140 and the stator slot 130 are staggered, that is, the groove bottom of the groove structure 140 and the groove bottom of the stator slot 130 are avoided to be on the same diameter line or center line. In this way, it can be ensured that the groove depth of the groove structure 140 and the groove depth of the stator slot 130 are not set relative to each other, and the width of the stator yoke 110 is ensured not to be narrowed, the width of the stator yoke 110 is increased as much as possible, and the efficiency of the stator yoke 110 in carrying and conducting magnetic flux is improved, thereby improving the overload capacity and efficiency of the motor 300, reducing hysteresis loss, reducing energy loss, achieving overall magnetic saturation reduction, reducing iron loss and winding loss, and improving efficiency by 0.3%.

[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 0.1°, 0.2°, 0.5°, 0.8°, 1°, etc., and technical personnel in this field 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, it is ensured that the groove depth of the groove structure 140 and the groove depth of the stator slot 130 are not set relative to each other, and the width of the stator yoke 110 is ensured not to be narrowed. The width of the stator yoke 110 is increased as much as possible, and the efficiency of the stator yoke 110 in carrying and conducting magnetic flux is improved, thereby improving the overload capacity and efficiency of the motor 300, reducing the excitation constant current, reducing winding loss, and reducing iron loss or copper loss at the same time.

[0078] In some embodiments, optionally, an angle θ between a center line of the groove structure 140 and a center line of the stator tooth 120 satisfies: θ=0°.

[0079] Specifically, by setting the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 to satisfy: θ = 0°, thus, by limiting the center line of the groove structure 140 to coincide with the center line of the stator tooth 120, the groove structure 140 and the stator slot 130 can be staggered, that is, the groove bottom of the groove structure 140 and the groove bottom of the stator slot 130 are avoided to be on the same diameter line or center line. In this way, it can be ensured that the groove depth of the groove structure 140 and the groove depth of the stator slot 130 are not set relative to each other, and the width of the stator yoke 110 is maximized, the width of the stator yoke 110 is maximized, and the efficiency of the stator yoke 110 in carrying and conducting magnetic flux is improved, thereby improving the overload capacity and efficiency of the motor 300, reducing hysteresis loss, reducing energy loss, achieving overall magnetic saturation reduction, reducing iron loss and winding loss, and improving efficiency by 0.3%.

[0080] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the groove structure 140 includes: a first groove 142 and a second groove 144. The number of the first groove 142 and the second groove 144 is multiple, and the multiple first grooves 142 and the multiple second grooves 144 are alternately arranged on the outer circumferential surface of the stator yoke 110, and in the radial cross-section of the stator yoke 110, the second groove 144 is located in the center line direction of the first groove 142.

[0081] Specifically, if Figure 2 As shown, the groove structure 140 includes a first groove 142 and a second groove 144. There are multiple first grooves 142 and second grooves 144, which are alternately and spaced apart on the outer circumferential surface of the stator yoke 110. In the radial cross section of the stator yoke 110, the second groove 144 is located in the centerline direction of the first groove 142. In other words, the second groove 144 is located in the centerline direction of the first groove 142, or it can be understood that the second groove 144 is located at the radial point of the first groove 142, that is, at 180°±θ. ° In terms of angular position, there are two groove structures 140 of different sizes. This ensures that different groove structures 140 are provided at both ends of the center line or diameter line of a groove structure 140, thereby increasing the width of the stator yoke 110 and avoiding the situation where the same type of groove structures 140 are provided at both ends of the center line or diameter line of the groove structure 140, resulting in a narrowing of the stator yoke 110. This in turn improves the overload capacity and efficiency of the motor 300, thereby reducing the hysteresis loss of the motor 300 and reducing energy loss.

[0082] Specifically, if Figure 1 and Figure 2 As shown, multiple first grooves 142 and multiple second grooves 144 are alternately and spaced apart on the outer circumferential surface of the stator yoke 110. It can be understood that a first groove 142 and a second groove 144 are alternately arranged, or multiple first grooves 142 and a second groove 144 are alternately arranged, or a first groove 142 and multiple second grooves 144 are alternately arranged. The alternating and spaced arrangement of the first grooves 142 and the second grooves 144 can be arranged according to actual needs, and is not limited here.

[0083] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, along the circumferential direction of the stator yoke 110 , the width of the first groove 142 is greater than the width of the second groove 144 , and along the radial direction of the stator yoke 110 , the depth of the first groove 142 is greater than the depth of the second groove 144 .

[0084] Specifically, along the circumference of the stator yoke 110, the width of the first groove 142 is greater than the width of the second groove 144, and along the radial direction of the stator yoke 110, the depth of the first groove 142 is greater than the depth of the second groove 144. In other words, the first groove 142 and the second groove 144 are two different types of groove structures 140. By providing different types of groove structures 140, on the one hand, it is possible to ensure that different groove structures 140 are provided at both ends of the centerline or diameter of a groove structure 140, thereby increasing the width of the stator yoke 110 and avoiding the narrowing of the stator yoke 110 caused by providing the same type of groove structure 140 at both ends of the centerline or diameter of the groove structure 140. This, in turn, improves the overload capacity and efficiency of the motor 300, thereby reducing hysteresis loss and energy loss in the motor 300. On the other hand, it ensures that the refrigerant and lubricating oil of the compressor 400 can circulate within the stator core 200.

[0085] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, the outer circumferential surface of the stator yoke 110 is provided with a cutting edge structure 150 , and the number of the cutting edge structures 150 is the same as the number of stator poles.

[0086] Specifically, if Figure 1 and Figure 2 As shown, the stator punching sheet 100 further includes a trimming structure 150, i.e., a trimming structure 150 is provided on the outer circumferential surface of the stator yoke 110. Furthermore, the number of trimming structures 150 is the same as the number of stator poles. This ensures that the refrigerant and lubricating oil of the compressor 400 can flow through the trimming structures 150 within the stator core 200, while also minimizing the number of trimming structures 150, thereby preventing the width of the stator yoke 110 from being narrowed, improving the overload capacity and efficiency of the motor 300, and thereby reducing the hysteresis loss of the motor 300 and energy loss.

[0087] In some embodiments, optionally, as Figure 1 and Figure 2 As shown, in the radial cross section of the stator yoke 110 , the first grooves 142 and the second grooves 144 are distributed in equal numbers on both sides of the center line of the trimming structure 150 .

[0088] Specifically, if Figure 1As shown, by being arranged in the radial cross-section of the stator yoke 110, the first grooves 142 and the second grooves 144 are distributed in equal numbers on both sides of the centerline of the trim structure 150. Due to the symmetrical distribution of the first grooves 142 and the second grooves 144, the magnetic field strength on both sides of the stator yoke 110 can be effectively balanced, reducing magnetic field distortion, thereby avoiding excessive magnetic field concentration or weakening in specific areas. This balanced magnetic field distribution helps improve the overall operating efficiency of the motor 300, especially under high load conditions, and can more effectively resist magnetic field saturation and improve the output capacity of the motor 300.

[0089] The symmetrical distribution of the first and second grooves 142 and 144 helps to disperse stress, improve the overall rigidity and stability of the stator yoke 110, and reduce the risk of structural damage caused by vibration or load changes.

[0090] Specifically, the first groove 142 and the second groove 144 are not only provided for flow, but also increase the surface area of the stator yoke 110, which is conducive to heat dissipation. The symmetrically distributed grooves can ensure that heat is evenly distributed on both sides of the stator yoke 110, avoiding local overheating, further improving the heat dissipation performance of the motor 300, and ensuring the reliability and stability of the motor 300 under long-term high-load operation. The symmetrical distribution of the first groove 142 and the second groove 144 simplifies the processing process, reduces the processing difficulty and cost. At the same time, during the maintenance and overhaul of the motor 300, the symmetrically distributed grooves also facilitate fault diagnosis and component replacement, thereby improving maintenance efficiency. The present application symmetrically distributes the first groove 142 and the second groove 144 in the radial cross-section of the stator yoke 110, and optimizes the layout of the first groove 142 and the second groove 144. This can effectively solve the problems of narrowing the width of the stator yoke 110, easy saturation of the magnetic field, and reduced efficiency of the motor 300 without sacrificing the performance of the motor 300, thereby achieving a dual improvement in the performance and structural strength of the motor 300.

[0091] In some embodiments, optionally, as Figure 1 and Figure 2 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 arranged at intervals on the inner circumferential surface of the stator yoke 110, wherein, along the radial direction of the stator yoke 110, the depth of the first stator slot 132 is less than the depth of the second stator slot 134.

[0092] Specifically, if Figure 1 and Figure 2As shown, the stator slots 130 include a first stator slot 132 and a second stator slot 134. Multiple first stator slots 132 and multiple 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 depth of the first stator slots 132 is less than the depth of the second stator slots 134. In other words, the first stator slots 132 and the second stator slots 134 are two different types of stator slot 130 structures. By providing different types of stator slot 130 structures, the width of the stator yoke 110 can be increased, improving the overload capacity and efficiency of the motor 300, thereby reducing hysteresis losses and energy loss in the motor 300. Furthermore, the flexibility of stator slot 130 configuration can be increased. Furthermore, the design of stator slots 130 with different depths can guide magnetic flux more efficiently through the stator core 200. This design helps optimize the magnetic flux path, reduce magnetic resistance, and improve the electromagnetic conversion efficiency of the motor 300.

[0093] 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 smaller 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 their spacing, 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.

[0094] Specifically, if Figure 1 and Figure 2 As shown, multiple first stator slots 132 and multiple 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 multiple first stator slots 132 and a second stator slot 134 are arranged alternately, or a first stator slot 132 and multiple second stator slots 134 are arranged alternately. The alternating and spaced 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.

[0095] According to the second aspect of this application, Figure 4As 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.

[0096] 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.

[0097] 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 .

[0098] 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 .

[0099] 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.

[0100] In addition, if Figure 4 As shown, the motor 300 further includes a rotor core 310, which is rotatably disposed in the stator inner hole 220 of the stator core 200. The rotor core 310 is acted upon by the magnetic field generated by the current in the stator core 200 to generate a rotational torque, thereby converting electrical energy into mechanical energy.

[0101] 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.

[0102] The compressor 400 provided in the present 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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, the inner circumferential surface of the stator yoke and two adjacent stator teeth forming a stator slot, and the stator punching is provided with Q stator slots, wherein Q is a positive integer greater than or equal to 2; A groove structure, wherein the number of the groove structures is multiple, and the 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 angle between the center line of the groove structure and the center line of the stator tooth is θ, and the relationship between the number of stator slots Q and the angle θ satisfies: Furthermore, any of the groove structures is asymmetrically arranged relative to its own diametre point on the outer circumferential surface of the stator yoke.

2. The stator sheet according to claim 1, characterized in that: An angle θ between a center line of the groove structure and a center line of the stator tooth satisfies: 0<θ≤1°.

3. The stator sheet according to claim 1, characterized in that: An angle θ between a center line of the groove structure and a center line of the stator tooth satisfies: θ=0°.

4. The stator sheet according to claim 1, characterized in that: The groove structure comprises: A first groove and a second groove, the number of the first groove and the second groove is multiple, the multiple first grooves and the multiple second grooves are arranged in an alternating manner on the outer circumferential surface of the stator yoke, and in the radial cross-section of the stator yoke, the second groove is located in the center line direction of the first groove.

5. The stator punching sheet according to claim 4, characterized in that: Along the circumferential direction of the stator yoke, the width of the first groove is greater than the width of the second groove, and along the radial direction of the stator yoke, the depth of the first groove is greater than the depth of the second groove.

6. The stator punching sheet according to claim 4, characterized in that: The outer circumferential surface of the stator yoke is provided with a trimming structure, and the number of the trimming structures is the same as the number of stator poles.

7. The stator sheet according to claim 6, characterized in that: In a radial cross section of the stator yoke, the first grooves and the second grooves are distributed in equal numbers on both sides of a center line of the trimming structure.

8. The stator punching sheet according to claim 1, 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 arranged at intervals on the inner circumferential surface of the stator yoke, wherein, along the radial direction of the stator yoke, the depth of the first stator slot is smaller than the depth of the second stator slot.

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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