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 made of a non-oriented silicon steel sheet; the plurality of stator slots are arranged on the inner circumferential surface of the stator yoke part, the notches of the stator slots face the circle center direction of the stator yoke part, and a mounting slot is formed between any two adjacent stator slots; the stator teeth are made of oriented silicon steel sheets, and each stator tooth is correspondingly inserted and mounted in one mounting groove; the groove structure is arranged on the outer circumferential surface of the stator yoke part, the groove structure comprises a first groove and a second groove, and the second groove is located in the center line direction of the first groove in the radial section of the stator yoke part. By adopting the stator yoke part of the non-oriented silicon steel sheet and the stator teeth of the oriented silicon steel sheet, the groove area of the stator groove is increased, and the winding loss is reduced; by optimizing the layout of the groove structure, the width of the stator yoke part and the overload capacity 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] In recent years, the performance and cost requirements for compressors have become increasingly higher. Usually, copper wire is used for the motor winding of the compressor, but the cost of copper wire is relatively high. Using aluminum wire instead of copper wire can significantly reduce the cost of the compressor. However, the resistivity of aluminum wire is relatively high. The resistance of aluminum wire motors with the same wire diameter and number of turns is about 1.6 times greater than that of copper wire. As a result, the efficiency and maximum output torque of aluminum wire motors are much lower than those of copper wire motors. It is necessary to increase the slot area of ​​the motor winding, reduce the resistance, balance the winding loss and other losses, and optimize the motor efficiency. Due to the limitations of traditional motor materials, increasing the slot area on the original copper wire motor solution will easily cause the stator teeth and yoke to saturate, making it impossible to significantly reduce the winding resistance, thereby affecting the motor efficiency and maximum output capacity. Utility Model Content

[0003] The present application aims to at least solve the technical problems in related technologies or related technologies, in which the spatial volume of the stator slots cannot be increased due to the size limitations of the stator teeth and stator yoke and the limitations of magnetic density, resulting in the limitation of the motor energy efficiency and maximum output torque, and the increase of the outer circle cutting structure and the groove structure of the stator yoke will lead to a reduction in the width 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 and is made of non-oriented silicon steel sheets; a plurality of stator slots, which are arranged on the inner circumferential surface of the stator yoke and distributed along the circumference of the stator yoke, wherein the slot openings of the stator slots are facing the center direction of the stator yoke, and an installation groove is provided between any two adjacent stator slots; a plurality of stator teeth, which are made of oriented silicon steel sheets, and each stator tooth is correspondingly inserted and installed in a installation groove; a groove structure, which is arranged on the outer circumferential surface of the stator yoke, and the groove structure includes a first groove and a second groove, and the number of the first groove and the second groove is multiple, and 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.

[0010] The stator punching provided in the present application includes a stator yoke, a stator slot, a stator tooth and a groove structure. Among them, the stator yoke is arranged as an annular structure, and the stator yoke is made of non-oriented silicon steel sheets, that is, the stator yoke is made of non-oriented silicon steel sheets. The number of stator slots is multiple, and the multiple stator slots are arranged on the inner circumferential surface of the stator yoke and are spaced apart along the circumference of the stator yoke, that is, the multiple stator slots are evenly distributed on the inner circumferential surface of the stator yoke, and there is a certain interval between two adjacent stator slots. In addition, the notch direction of the stator slot is toward the center direction of the stator yoke, and an installation slot is provided between any two adjacent stator slots, that is, the installation slot is spaced between two adjacent stator slots, and the notch direction of the installation slot is toward the center direction of the stator yoke, for installing and fixing the stator teeth. The number of stator teeth is multiple, and each stator tooth is correspondingly inserted and installed in a mounting slot, so that one mounting slot is installed and fixed to one stator tooth, and the stator teeth are made of oriented silicon steel sheets, that is, the stator teeth are pressed from oriented silicon steel sheets.

[0011] By setting the stator yoke to be made of non-oriented silicon steel sheets and the stator teeth to be made of oriented silicon steel sheets, since the inflection point value of the BH curve of the stator teeth made of oriented silicon steel sheets is higher than the inflection point value of the BH curve of the stator yoke made of non-oriented silicon steel sheets, that is, the magnetic flux flowing in the stator teeth of the oriented silicon steel sheets is higher, this can appropriately reduce the tooth width of the stator teeth and increase the slot area of ​​the stator slots, thereby reducing winding losses and improving the motor efficiency and maximum output capacity of the aluminum wire motor. In addition, the iron loss coefficient of the oriented silicon steel sheets is lower, and the iron loss generated is low, thereby improving the motor efficiency and maximum output capacity of the aluminum wire motor. Compared with the traditional solution, the motor efficiency is improved by 0.3%.

[0012] The stator lamination also includes a groove structure. The groove structures are multiple in number and are arranged on the outer circumferential surface of the stator yoke, distributed along the circumference of the stator yoke, and extending in the axial direction of the stator yoke. The groove structure includes a first groove and a second groove. The first groove and the second groove are arranged alternately and spaced apart on the outer circumferential surface of the stator yoke. In a radial cross-section of the stator yoke, the second groove is located along the centerline of the first groove. In other words, the second groove is located along the centerline of the first groove, i.e., at a diametrical point with respect to the first groove. Alternatively, in a radial cross-section of the stator yoke, the first groove and the second groove are located at opposite ends of the same diameter line on the outer circumferential surface of the stator yoke. This ensures that different groove structures are arranged at the two ends of a groove structure's centerline or diameter line, thereby increasing the width of the stator yoke and avoiding the situation where the same type of groove structure is arranged at both ends of the groove structure's centerline or diameter line, resulting in an excessively narrow stator yoke width. This reduces hysteresis loss and energy loss in the motor, thereby improving the motor's overload capacity and efficiency.

[0013] The stator punching sheet according to the above technical solution of the present application may also have the following additional technical features:

[0014] In some technical solutions, optionally, the inflection point value of the BH curve of the oriented silicon steel sheet is greater than the inflection point value of the BH curve of the non-oriented silicon steel sheet.

[0015] In this technical solution, the inflection point value of the BH curve of the oriented silicon steel sheet is greater than the inflection point value of the BH curve of the non-oriented silicon steel sheet. Since the inflection point value of the BH curve of the stator teeth made of the oriented silicon steel sheet is higher than the inflection point of the BH curve of the stator yoke made of the non-oriented silicon steel sheet, that is, the magnetic flux flows more in the stator teeth of the oriented silicon steel sheet, this can appropriately reduce the tooth width of the stator teeth and increase the slot area of ​​the stator slot, thereby reducing the winding loss and increasing the motor efficiency and maximum output capacity of the aluminum wire motor. In addition, the iron loss coefficient of the oriented silicon steel sheet is lower, and the iron loss generated is low, which improves the motor efficiency and maximum output capacity of the aluminum wire motor. Compared with the traditional solution, the motor efficiency is improved by 0.3%.

[0016] In some technical solutions, optionally, the stator teeth are connected to the mounting slots by interference fit.

[0017] In this technical solution, by setting up an interference fit connection design between the stator teeth and the mounting slots, it has achieved significant results in enhancing structural stability, improving heat conduction efficiency, optimizing electromagnetic performance, reducing noise and vibration, and simplifying assembly processes. It can also improve motor performance and enhance the reliability of motor performance.

[0018] 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.

[0019] 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 the stator yoke width being too narrow. This in turn reduces the hysteresis loss of the motor, reduces energy loss, and thus improves the motor's overload capacity and efficiency. On the other hand, it can ensure that the compressor refrigerant and lubricating oil can circulate within the stator core.

[0020] 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.

[0021] 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 being too narrow. This in turn reduces the motor's hysteresis loss and energy loss, thereby improving the motor's overload capacity and efficiency.

[0022] 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.

[0023] 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.

[0024] In some technical solutions, optionally, 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 angle θ between the center line of the groove structure and the center line of the stator tooth satisfies: 0≤θ≤1°.

[0025] In this technical solution, within the radial cross-section of the stator yoke, the angle θ between the centerline of the groove structure and the centerline of the stator tooth satisfies the following conditions: 0 ≤ θ ≤ 1°. By limiting the range of the angle θ between the centerline of the groove structure and the centerline of the stator tooth, the groove structure and the stator slot are offset, preventing the bottom of the groove structure from being on the same diameter or centerline as the bottom of the stator slot. This ensures that the groove depth of the groove structure and the stator slot are not opposite each other, ensuring that the width of the stator yoke is not narrowed. The stator yoke width is maximized, improving the stator yoke's load-bearing and magnetic flux conduction efficiency, reducing hysteresis loss and energy loss, and thus improving the motor's overload capacity and efficiency. This reduces overall magnetic saturation, aluminum loss, and winding loss, resulting in a 0.3% efficiency improvement.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] According to a fourth aspect of the present application, a compressor is also proposed, comprising: a motor as in the above solution.

[0033] 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.

[0034] According to a fifth aspect of the present application, a refrigeration device is also proposed, including: a compressor as in the above solution.

[0035] 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.

[0036] 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

[0037] 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:

[0038] Figure 1 This is a schematic structural diagram of a stator punching sheet according to an embodiment of the present application;

[0039] Figure 2 A schematic diagram of a magnetization curve of a motor according to an embodiment of the present application;

[0040] Figure 3 A schematic diagram of an iron loss curve of a motor according to an embodiment of the present application;

[0041] Figure 4 This is a schematic structural diagram of a refrigeration device according to an embodiment of the present application.

[0042] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names is as follows:

[0043] 100 stator punching sheet, 110 stator yoke, 120 stator teeth, 130 stator slots, 132 mounting slots, 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figures 1 to 4 As shown, Figure 1 This is a structural diagram of a stator punching sheet 100 according to an embodiment of the present application; Figure 2 A schematic diagram of a magnetization curve of a motor 300 according to an embodiment of the present application; Figure 3 Schematic diagram of an iron loss curve of a motor 300 according to an embodiment of the present application; Figure 4 This is a structural diagram of a refrigeration device 500 according to an embodiment of the present application. A stator punching sheet 100 provided in an embodiment of the present application includes: a stator yoke 110, which is a circular ring structure and is made of non-oriented silicon steel sheets; a plurality of stator slots 130, which are arranged on the inner circumferential surface of the stator yoke 110 and are distributed along the circumference of the stator yoke 110, wherein the notches of the stator slots 130 face the center of the stator yoke 110, and an installation slot 132 is provided between any two adjacent stator slots 130; a plurality of stator teeth 120, which are made of oriented silicon steel sheets, and Each stator tooth 120 is inserted and installed in a corresponding installation groove 132; the groove structure 140 is arranged on the outer circumferential surface of the stator yoke 110, and 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.

[0048] Specifically, if Figure 1As shown, the stator punching sheet 100 includes a stator yoke 110, stator slots 130, stator teeth 120, and a groove structure 140. The stator yoke 110 is configured as an annular structure and is made of non-oriented silicon steel sheets. In other words, the stator yoke 110 is made of non-oriented silicon steel sheets. There are multiple stator slots 130, which are arranged on the inner circumferential surface of the stator yoke 110 and spaced apart along the circumference of the stator yoke 110. In other words, the multiple stator slots 130 are evenly distributed on the inner circumferential surface of the stator yoke 110, and there is a certain interval between two adjacent stator slots 130. In addition, the slot openings of the stator slots 130 face the center of the stator yoke 110. A mounting slot 132 is defined between any two adjacent stator slots 130. Specifically, the mounting slots 132 are spaced apart between two adjacent stator slots 130, with the slot openings of the mounting slots 132 facing the center of the stator yoke 110. These slots are used to mount and secure the stator teeth 120. There are multiple stator teeth 120, each of which is inserted and mounted in a corresponding mounting slot 132, so that one stator tooth 120 is mounted and secured to each mounting slot 132. The stator teeth 120 are made of grain-oriented silicon steel sheets, i.e., they are pressed from grain-oriented silicon steel sheets.

[0049] By setting the stator yoke 110 to be made of non-oriented silicon steel sheets and the stator teeth 120 to be made of oriented silicon steel sheets, since the inflection point value of the BH curve of the stator teeth 120 made of oriented silicon steel sheets is higher than the inflection point value of the BH curve of the stator yoke 110 made of non-oriented silicon steel sheets, that is, the magnetic flux flowing in the stator teeth 120 made of oriented silicon steel sheets is higher, this can appropriately reduce the tooth width of the stator teeth 120 and increase the slot area of ​​the stator slots 130, thereby reducing winding losses and improving the motor efficiency and maximum output capacity of the aluminum wire motor. In addition, the iron loss coefficient of the oriented silicon steel sheets is lower, and the iron loss generated is low, thereby improving the motor efficiency and maximum output capacity of the aluminum wire motor. Compared with the traditional solution, the efficiency of the motor 300 is improved by 0.3%.

[0050] The stator punching 100 also includes a plurality of groove structures 140. These 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. The groove structures 140 extend along the axial direction of the stator yoke 110. The groove structures 140 include a first groove 142 and a second groove 144. The first grooves 142 and the second grooves 144 are arranged alternately and spaced apart on the outer circumferential surface of the stator yoke 110. Within a radial cross-section of the stator yoke 110, the second grooves 144 are located in the direction of the centerline of the first grooves 142. In other words, the second grooves 144 are arranged in the direction of the centerline of the first grooves 142, i.e., at a diametrical point with respect to the first grooves 142. Or it can also be understood that, in the radial cross-section of the stator yoke 110, on the outer circumferential surface of the stator yoke 110, the first groove 142 and the second groove 144 are located at the two ends of the same diameter line. In this way, it can be ensured that different groove structures 140 are set at both ends of the center line or diameter line of a groove structure 140, thereby increasing the width of the stator yoke 110, avoiding the situation where the same type of groove structures 140 are set at both ends of the center line or diameter line of the groove structure 140, resulting in the stator yoke 110 being too narrow, thereby reducing the hysteresis loss of the motor 300, reducing energy loss, and thus improving the overload capacity and efficiency of the motor 300.

[0051] Specifically, in related art, the windings of air-conditioning compressor motors are typically wound using copper wire, which is relatively expensive. Replacing copper wire with aluminum wire is less expensive, but the efficiency and maximum output torque of aluminum wire motors are lower than those of copper wire motors, given the same winding slot volume. Increasing the volume of the stator slots could improve the efficiency of aluminum wire motors. However, due to the limited space and magnetic flux density of the stator teeth and stator yoke, the stator slots cannot be enlarged, limiting the energy efficiency and maximum output torque of aluminum wire motors, thus affecting the motor's efficiency and maximum output capacity.

[0052] This application addresses this issue. Figure 1As shown, by setting the stator yoke 110 to be made of non-oriented silicon steel sheets and the stator teeth 120 to be made of oriented silicon steel sheets, by combining the characteristics of non-oriented silicon steel sheets and oriented silicon steel sheets, and by optimizing the structural design of the stator punching sheet 100, the efficiency and maximum output capacity of the aluminum wire motor are effectively improved. Specifically, the use of non-oriented silicon steel sheets to make the stator yoke 110 ensures the integrity and strength of the structure. At the same time, the use of oriented silicon steel sheets to make the stator teeth 120 fully utilizes the high magnetic permeability characteristics of the oriented silicon steel sheets in a specific direction. This combination not only reduces the tooth width of the stator teeth 120, thereby increasing the slot area of ​​the stator slots 130, providing more space for the aluminum wire winding and reducing winding losses, but also further improves the overall efficiency of the motor 300 by reducing the iron loss coefficient.

[0053] Specifically, oriented silicon steel sheets undergo specific processing and heat treatment to achieve orderly alignment of the grains in the material along the rolling direction, resulting in excellent magnetic properties in the rolling direction. This means that magnetic flux flows more easily in the rolling direction, a characteristic that can be considered "unidirectional flux." The stator teeth 120 are the primary path for the magnetic flux, and adopting a single direction facilitates the passage of magnetic flux, reducing magnetic resistance. When magnetic flux passes along this direction, it encounters minimal resistance, and energy loss is correspondingly reduced. Therefore, using oriented silicon steel sheets in the manufacture of the stator teeth 120 ensures efficient flow of magnetic flux along the primary path, effectively reducing magnetic resistance and improving the efficiency of the motor 300. Non-oriented silicon steel sheets, on the other hand, have magnetic flux in all directions, which is advantageous for the stator yoke 110, which has a complex magnetic flux path. Because the magnetic flux path of the stator yoke 110 is often complex and involves multiple directions, a stator yoke 110 made of non-oriented silicon steel sheets can better adapt to this complex magnetic flux path, ensuring smooth flow of magnetic flux within the stator yoke 110 and reducing energy loss. By rationally designing the materials of the stator teeth 120 and the stator yoke 110, the tooth width of the stator teeth 120 can be reduced, thereby increasing the slot area of ​​the stator slot 130, providing more space for the aluminum wire winding, reducing winding losses, reducing the iron loss coefficient, and improving the overall efficiency of the motor 300.

[0054] In addition, if Figure 1 As shown, the present application alternately arranges first grooves 142 and second grooves 144 on the outer circumferential surface of the stator yoke 110, ensuring that the second grooves 144 are located in the direction of the centerline of the first grooves 142. This layout not only increases the effective width of the stator yoke 110, improving the overload capacity and overall efficiency of the motor 300, but also optimizes the stress distribution of the stator yoke 110 and enhances the structural stability. This overcomes the limitation of the symmetrical layout of the groove structure 140 in traditional motor designs.

[0055] The stator punching sheet 100 provided in the present application solves the bottleneck problem of efficiency and maximum output capacity of aluminum wire motors by setting the stator yoke 110 to be made of non-oriented silicon steel sheets and the stator teeth 120 to be made of oriented silicon steel sheets. By adopting a combination of non-oriented silicon steel sheets to make the stator yoke 110 and oriented silicon steel sheets to make the stator teeth 120, the slot area of ​​the stator slot 130 is increased and the winding loss is reduced; at the same time, by optimizing the layout of the groove structure 140, the width of the stator yoke 110 and the overload capacity of the motor 300 are increased, and the hysteresis loss and energy loss of the motor 300 are further reduced. While maintaining the cost advantage, the efficiency and maximum output capacity of the aluminum wire motor are significantly improved, reaching a performance level similar to or even better than that of the copper wire motor, such as Figure 2 and Figure 3 As shown, it can be seen from the magnetization curves and iron loss curves of oriented silicon steel sheets and non-oriented silicon steel sheets that the BH curve inflection point value of the oriented silicon steel sheets is higher, the magnetic flux is larger, and the iron loss is lower. Compared with the traditional solution, the efficiency of the motor 300 of this application is improved by 0.3%.

[0056] In some embodiments, optionally, the inflection point value of the BH curve of the oriented silicon steel sheet is greater than the inflection point value of the BH curve of the non-oriented silicon steel sheet.

[0057] Specifically, the inflection point value of the BH curve of the oriented silicon steel sheet is greater than the inflection point value of the BH curve of the non-oriented silicon steel sheet. Since the inflection point value of the BH curve of the stator tooth 120 made of the oriented silicon steel sheet is higher than the inflection point of the BH curve of the stator yoke 110 made of the non-oriented silicon steel sheet, that is, the magnetic flux flows more in the stator tooth 120 of the oriented silicon steel sheet, this can appropriately reduce the tooth width of the stator tooth 120 and increase the slot area of ​​the stator slot 130, thereby reducing the winding loss and increasing the motor efficiency and maximum output capacity of the aluminum wire motor. In addition, the iron loss coefficient of the oriented silicon steel sheet is lower, and the iron loss generated is low, thereby improving the motor efficiency and maximum output capacity of the aluminum wire motor. Compared with the traditional solution, the efficiency of the motor 300 is improved by 0.3%.

[0058] Specifically, the inflection point of the BH curve reflects the maximum magnetic flux density a material can achieve before reaching saturation in a magnetic field. Due to their unique grain arrangement, oriented silicon steel sheets can carry a higher magnetic flux density in the rolling direction, resulting in a higher BH curve inflection point. Therefore, using oriented silicon steel sheets in the manufacture of stator teeth 120 allows them to carry more magnetic flux at the same magnetic field strength, thereby increasing the magnetic flux density of the motor 300 and boosting its output power and efficiency.

[0059] Due to the low reluctance of the oriented silicon steel sheets in the rolling direction, the magnetic flux flows more smoothly in this direction, reducing energy loss in the reluctance. This characteristic is particularly important in the stator teeth 120, the main path of the magnetic flux, and can significantly reduce the reluctance loss of the motor 300 and improve energy conversion efficiency.

[0060] By using oriented silicon steel sheets with high BH curve inflection point values ​​to manufacture the stator teeth 120 and combining them with the stator yoke 110 made of non-oriented silicon steel sheets, the present application not only improves the magnetic flux density of the motor 300 and reduces the magnetic resistance, but also achieves higher efficiency, greater output torque and stronger overload capacity. Figure 2 and Figure 3 As shown, it can be seen from the magnetization curves and iron loss curves of oriented silicon steel sheets and non-oriented silicon steel sheets that the BH curve inflection point value of the oriented silicon steel sheets is higher, the magnetic flux is larger, and the iron loss is lower. Compared with the traditional solution, the efficiency of the motor 300 of this application is improved by 0.3%.

[0061] In some embodiments, optionally, the stator teeth 120 are connected to the mounting slots 132 by interference fit.

[0062] Specifically, if Figure 1 As shown, by setting up an interference fit connection design between the stator teeth 120 and the mounting slots 132, significant effects are achieved in enhancing structural stability, improving heat conduction efficiency, optimizing electromagnetic performance, reducing noise and vibration, and simplifying assembly processes, and the performance of the motor 300 can be improved and the reliability of the performance of the motor 300 can be enhanced.

[0063] Specifically, by providing an interference fit connection between the stator teeth 120 and the mounting slots 132, the interference fit creates a certain amount of interference between the stator teeth 120 and the mounting slots 132, achieving a tight fit. This tight fit effectively prevents the stator teeth 120 from loosening or shifting due to vibration or impact during operation of the motor 300, thereby enhancing the overall stability and reliability of the motor 300 structure. Furthermore, the interference fit connection not only enhances the mechanical connection strength but also promotes heat conduction between the stator teeth 120 and the mounting slots 132. During operation of the motor 300, the stator teeth 120 generate heat due to the passage of current. The interference fit connection helps to promptly conduct this heat to the mounting slots 132 and the stator yoke 110, where it is then dissipated through the heat dissipation system, avoiding local overheating and improving the thermal stability and service life of the motor 300. Furthermore, the interference fit connection reduces the gap between the stator teeth 120 and the mounting slots 132, reducing electromagnetic leakage and eddy current losses caused by the gap. At the same time, the tight assembly also makes the magnetic field distribution between the stator teeth 120 and the stator slots 130 more uniform, which is beneficial to improving the electromagnetic performance and efficiency of the motor 300. At the same time, the interference fit connection reduces the mechanical vibration and noise caused by excessive assembly clearance.

[0064] In some embodiments, optionally, as Figure 1 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 .

[0065] Specifically, if Figure 1 As shown, 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 situation where the same type of groove structure 140 is provided at both ends of the centerline or diameter of the groove structure 140, resulting in the stator yoke 110 being too narrow. This reduces the hysteresis loss and energy loss of the motor 300, thereby improving the overload capacity and efficiency of 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.

[0066] In some embodiments, optionally, as Figure 1 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.

[0067] Specifically, if Figure 1 As shown, the stator punching sheet 100 also includes a trimming structure 150, that is, a trimming structure 150 is provided on the outer circumferential surface of the stator yoke 110. Moreover, the number of the trimming structures 150 is the same as the number of stator poles. In this way, it can ensure that the refrigerant and lubricating oil of the compressor 400 flow through the trimming structure 150 in the stator core 200, and can also minimize the number of the trimming structures 150 to avoid the width of the stator yoke 110 being too narrow, thereby reducing the hysteresis loss of the motor 300 and reducing energy loss, thereby improving the overload capacity and efficiency of the motor 300. Specifically, as Figure 1 As shown, the stator pole number of the present application is 2, and the number of the trimming structures 150 is 2.

[0068] In some embodiments, optionally, as Figure 1 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 .

[0069] Specifically, if Figure 1 As 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.

[0070] 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.

[0071] 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.

[0072] In some embodiments, optionally, as Figure 1 As shown, in the radial cross section of the stator yoke 110 , the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 is satisfied: 0≤θ≤1°.

[0073] Specifically, if Figure 1 As shown, in the radial cross section of the stator yoke 110, the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 is θ, and 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°. 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°, the range of the angle θ between the center line of the groove structure 140 and the center line of the stator tooth 120 is limited, so that the groove The slot structure 140 is staggered with the stator slot 130 to prevent the bottom of the slot structure 140 from being on the same diameter or centerline as the bottom of the stator slot 130. This ensures that the slot depth of the slot structure 140 and the stator slot 130 are not aligned, preventing the width of the stator yoke 110 from being narrowed. This maximizes the width of the stator yoke 110, improves the efficiency of the stator yoke 110 in carrying and conducting magnetic flux, reduces hysteresis loss, and reduces energy loss, thereby improving the overload capacity and efficiency of the motor 300. This reduces overall magnetic saturation, aluminum loss, and winding loss, resulting in a 0.3% efficiency improvement.

[0074] 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°, 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, the efficiency of the stator yoke 110 in carrying and conducting magnetic flux is improved, the excitation current is reduced, the winding loss is reduced, and the aluminum loss is reduced at the same time, thereby improving the overload capacity and efficiency of the motor 300.

[0075] 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, ensuring that the width of the stator yoke 110 is maximized, maximizing the width of the stator yoke 110, improving the efficiency of the stator yoke 110 in carrying and conducting magnetic flux, reducing hysteresis loss, reducing energy loss, achieving overall magnetic saturation reduction, and reducing aluminum loss and winding loss, thereby improving the overload capacity and efficiency of the motor 300, and the efficiency is improved by 0.3%.

[0076] 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.

[0077] 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.

[0078] 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 .

[0079] According to the third aspect of this application, Figure 4As 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 .

[0080] 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.

[0081] 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 aluminum induction motor.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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 and is made of non-oriented silicon steel sheets; A plurality of stator slots are provided on the inner circumferential surface of the stator yoke and distributed along the circumference of the stator yoke, wherein the slot openings of the stator slots face the center of the stator yoke, and a mounting slot is provided between any two adjacent stator slots; A plurality of stator teeth, each of which is made of oriented silicon steel sheets and is inserted and installed in a corresponding installation slot; A groove structure is arranged on the outer circumferential surface of the stator yoke, and the groove structure includes a first groove and a second groove. The number of the first groove and the second groove is multiple, and 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.

2. The stator sheet according to claim 1, characterized in that: The inflection point value of the BH curve of the oriented silicon steel sheet is greater than the inflection point value of the BH curve of the non-oriented silicon steel sheet.

3. The stator sheet according to claim 1, characterized in that: The stator teeth are connected to the mounting slots by interference fit.

4. The stator sheet according to claim 1, 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.

5. The stator punching sheet according to claim 1, 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.

6. The stator punching sheet according to claim 5, 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.

7. The stator lamination according to any one of claims 1 to 6, characterized in that: In a radial cross section of the stator yoke, an angle θ is formed between a center line of the groove structure and a center line of the stator tooth, and the angle θ satisfies: 0≤θ≤1°.

8. A stator core, characterized in that: It comprises the stator punching sheet according to any one of claims 1 to 7, 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.

9. A motor, characterized in that: The motor comprises the stator core according to claim 8; The rotor core is rotatably arranged in the stator inner hole of the stator core.

10. A compressor, characterized in that: Comprising the motor as claimed in claim 9.

11. A refrigeration device, characterized in that: Comprising the compressor of claim 10.

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