Stator assembly, motor with stator assembly, compressor and refrigeration equipment

Abstract

The utility model discloses a stator assembly and a motor, a compressor and refrigeration equipment having the same, the stator assembly comprises a stator iron core, the stator iron core comprises a stator yoke part and a plurality of stator tooth parts, the plurality of stator tooth parts are arranged on the inner circumferential surface of the stator yoke part along the circumferential direction of the stator yoke part, and are arranged at intervals along the circumferential direction of a base circle; a stator groove is formed between every two adjacent stator tooth parts, each stator tooth part comprises a tooth part body and a tooth boot, the tooth part bodies extend in the radial direction of the base circle, and the tooth boots are arranged on at least one side of the end parts, facing the center of the base circle, of the tooth part bodies; and one side, facing the stator slot, of the tooth boot is provided with a groove part. According to the stator assembly provided by the embodiment of the utility model, the groove parts are arranged on the tooth boots, so that the flux leakage of the motor in a heavy load state can be reduced, the efficiency of the motor can be improved, the overload capacity of the motor can be improved, the torque linearity of the motor can be improved, and the performance of the motor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, specifically, relate to a kind of stator assembly and the motor, compressor, refrigeration equipment with it. BACKGROUND

[0002] The motor in the related art is restricted by size, and how to increase the overload capacity of the motor becomes a major technical difficulty. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art is solved.For this purpose, the utility model provides a kind of stator assembly, by setting recess portion on tooth shoe, the magnetic flux leakage of motor under heavy load can be reduced, and then the efficiency of motor is facilitated to improve, the overload capacity of motor is improved and the torque linearity of motor is improved, and it is beneficial to improve the performance of motor.

[0004] The utility model also provides a kind of motor with the stator assembly.

[0005] The utility model also provides a kind of compressor with the motor.

[0006] The utility model also provides a kind of refrigeration equipment with the compressor.

[0007] According to the stator assembly of the first aspect embodiment of the utility model, including stator core, the stator core includes stator yoke part and multiple stator tooth parts, multiple the stator tooth parts are set to the inner peripheral surface of the stator yoke part along the circumference of the stator yoke part, and are arranged along the circumference of a base circle, in the axial section of the stator core, the outer contour line of the stator yoke part includes two first straight edges oppositely arranged in a first direction, two second straight edges oppositely arranged in a second direction, the second direction is perpendicular to the first direction, the first straight edge and the second straight edge are connected by connecting edge, and the distance between each of the first straight edge and the second straight edge and the axis of the stator core is less than the maximum distance between the connecting edge and the axis of the stator core;Two adjacent stator tooth parts form stator slot, the stator tooth part includes tooth portion body and tooth shoe, the tooth portion body extends along the radial direction of the base circle, and the tooth shoe is arranged on at least one side of the end of the tooth portion body towards the center of the base circle;Wherein, the side of the tooth shoe towards the stator slot is provided with recess portion.

[0008] According to the stator assembly of the utility model embodiment, by setting recess portion on tooth shoe, the magnetic flux leakage of motor under heavy load can be reduced, and then the efficiency of motor is facilitated to improve, the overload capacity of motor is improved and the torque linearity of motor is improved, and it is beneficial to improve the performance of motor.

[0009] In addition, the stator assembly according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the groove is disposed at a position of the toothed shoe close to the tooth body; the toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove away from the tooth body to the end of the toothed shoe away from the tooth body.

[0011] According to some embodiments of the present invention, at least two of the toothed shoes in the stator tooth portion are first toothed shoes and second toothed shoes. The first toothed shoes and the second toothed shoes are respectively disposed on both sides of the end of the tooth body facing the center of the base circle, and the groove portion is provided on the side of the first toothed shoe and the second toothed shoe facing the stator groove.

[0012] According to some optional embodiments of the present invention, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and spaced apart from the second tooth shoe of the other stator tooth to define the slot opening of the stator groove; or, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and connected to the second tooth shoe of the other stator tooth.

[0013] According to some embodiments of the present invention, in the axial section of the stator core, the multiple stator teeth have the same structure and are evenly distributed with the center of the base circle as the center of symmetry, and the outline of one end of the multiple stator teeth facing the center of the base circle is on the base circle.

[0014] According to some embodiments of the present invention, the stator core includes a plurality of stator laminations stacked along its axial direction, and the stator laminations are integrally formed parts.

[0015] According to a second aspect of the present invention, another stator assembly is provided. The stator assembly includes a mounting bracket and a plurality of stator teeth. The plurality of stator teeth are disposed on the mounting bracket and arranged at intervals along a base circle. A stator slot is provided between two adjacent stator teeth. Each stator tooth includes a tooth body and a tooth shoe. The tooth body extends radially along the base circle. The tooth shoe is disposed on at least one side of the end of the tooth body facing the center of the base circle. The tooth shoe has a groove on the side facing the stator slot.

[0016] According to the stator assembly of this utility model embodiment, by providing a groove on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of motor efficiency, overload capacity, and torque linearity, which is beneficial to improving motor performance.

[0017] In addition, the stator assembly according to the above embodiments of the present invention may also have the following additional technical features:

[0018] According to some embodiments of the present invention, the groove is disposed at a position of the toothed shoe close to the tooth body; the toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove away from the tooth body to the end of the toothed shoe away from the tooth body.

[0019] According to some embodiments of the present invention, at least two of the toothed shoes in the stator tooth portion are first toothed shoes and second toothed shoes. The first toothed shoes and the second toothed shoes are respectively disposed on both sides of the end of the tooth body facing the center of the base circle, and the groove portion is provided on the side of the first toothed shoe and the second toothed shoe facing the stator groove.

[0020] According to some optional embodiments of the present invention, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and spaced apart from the second tooth shoe of the other stator tooth to define the slot opening of the stator groove; or, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and connected to the second tooth shoe of the other stator tooth.

[0021] According to a third aspect of the present invention, an electric motor is provided, the electric motor including the stator assembly described in the first aspect of the present invention.

[0022] According to the embodiments of the present invention, by utilizing the stator assembly described in the first or second aspect of the present invention, and by providing a groove on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of the motor's efficiency, overload capacity, and torque linearity, which is beneficial to improving the motor's performance.

[0023] A compressor is provided according to a fourth aspect of the present invention, the compressor including the motor described in the third aspect of the present invention.

[0024] The compressor according to the present invention utilizes the motor described in the third aspect of the present invention. By providing a groove on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of motor efficiency, overload capacity, and torque linearity, which is beneficial to improving motor performance.

[0025] According to a fifth aspect of the present invention, a refrigeration device is provided, the refrigeration device including the compressor described in the fourth aspect of the present invention.

[0026] According to the refrigeration equipment of the present invention, by utilizing the compressor described in the fourth aspect of the present invention, by providing a groove on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of the motor's efficiency, overload capacity, and torque linearity, which is beneficial to improving the motor's performance.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of the stator core structure according to an embodiment of the present utility model;

[0030] Figure 2 This is a partial structural schematic diagram of the stator core according to some embodiments of the present utility model;

[0031] Figure 3 This is a partial structural schematic diagram of the stator core according to other embodiments of the present invention;

[0032] Figure 4 This is a graph showing the relationship between the current and torque of a motor according to an embodiment of the present invention;

[0033] Figure 5 This is a diagram showing the relationship between the dimensions of the toothed shoe in the radial direction of the base circle and θ according to an embodiment of the present invention.

[0034] Reference numerals: 100, stator core; 10, stator yoke; 11, first straight edge; 12, second straight edge; 20, stator tooth; 21, tooth body; 22, first tooth shoe; 221, first contour line; 222, first edge line; 223, second edge line; 23, second tooth shoe; 231, second contour line; 232, third edge line; 233, fourth edge line; 24, groove;

[0035] 30. Stator slot; 301. Slot opening; 31. First side wall; 32. Second side wall. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] The stator assembly according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] like Figures 1-4 As shown, the stator assembly according to an embodiment of the present invention includes a stator core 100.

[0039] The stator core includes a stator yoke 10 and a plurality of stator teeth 20. The plurality of stator teeth 20 are disposed on the inner circumferential surface of the stator yoke 10 along the circumferential direction and are arranged at intervals along a base circle.

[0040] In the axial section of the stator core 100, the outer contour of the stator yoke 10 includes two first straight edges 11 arranged opposite each other in a first direction and two second straight edges 12 arranged opposite each other in a second direction. The second direction is perpendicular to the first direction. The first straight edges 11 and the second straight edges 12 are connected by a connecting edge. The distance between each of the first straight edges 11 and the second straight edges 12 and the axis of the stator core 100 is less than the maximum distance between the connecting edge and the axis of the stator core 100.

[0041] In other words, the outer contour of the stator yoke 10 defines a rectangular structure, and the minimum distance between the axis of the stator core 100 and the outer contour of the stator yoke 10 is the distance between the axis of the stator core 100 and the first straight side 11 and / or the second straight side 12.

[0042] The stator yoke 10 has a near-rectangular structure, which facilitates more efficient use of space, especially in compact motor designs, helping to reduce the overall size of the motor. It also makes the stator yoke 10 more stable under electromagnetic and mechanical stresses, improving overall mechanical strength.

[0043] Meanwhile, by integrating multiple stator teeth 20 together using the stator yoke 10, the stator yoke 10 and stator teeth 20 become a single structure, enabling an integrated design of the electromagnetic structure and the mounting structure, which facilitates the reduction of the number of parts and improves the reliability and cost-effectiveness of the system.

[0044] A stator slot 30 is formed between two adjacent stator teeth 20. The stator teeth 20 includes a tooth body 21 and a tooth shoe. The tooth body 21 extends radially along the base circle. The tooth shoe is located on at least one side of the end of the tooth body 21 facing the center of the base circle. The tooth shoe has a groove 24 on the side facing the stator slot 30.

[0045] In the case of the stator assembly being used in a motor, when the motor is under heavy load and the magnetic flux is saturated, the groove 24 provided on the tooth shoe can reduce the leakage flux of the motor under heavy load, thereby improving the efficiency of the motor, increasing the overload capacity of the motor and improving the torque linearity of the motor, which is beneficial to improving the performance of the motor.

[0046] like Figure 4 As shown in Table (a), a comparative embodiment is introduced here, in which the toothed shoe does not have a groove 24. The toothed shoe in this application has a groove 24.

[0047] in, Figure 4 S1 in the equation refers to the relationship between the motor's current and torque when the toothed shoe does not have the groove 24. Figure 4 S2 in the equation represents the relationship between the motor current and torque when the toothed shoe has a groove 24.

[0048] By analyzing the data in Table (a) and Figure 3 A comparison of the function curves shows that, compared to the comparative scheme, by setting the groove 24 on the toothed shoe, the motor torque in this embodiment is greater under the same current, thereby improving the motor's overload capacity and improving the motor's performance.

[0049]

[0050] Table (a)

[0051] According to the stator assembly of this utility model embodiment, by providing a groove 24 on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of motor efficiency, overload capacity, and torque linearity, which is beneficial to improving motor performance.

[0052] The stator assembly according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0053] In some specific embodiments of this utility model, such as Figures 1-4 As shown, the stator assembly includes a stator core 100.

[0054] In some embodiments of this utility model, such as Figure 2 As shown, the groove 24 is located near the tooth body 21 of the toothed shoe.

[0055] In the case of the stator assembly being used in a motor, when the motor is under heavy load and the magnetic flux is saturated, the groove 24 is set at the position of the tooth shoe close to the tooth body 21. This helps to reduce the leakage flux of the motor under heavy load, thereby improving the efficiency of the motor, increasing the overload capacity of the motor, and improving the torque linearity of the motor, which is beneficial to improving the performance of the motor.

[0056] In some embodiments, a toothed shoe may be provided with one groove portion 24, or a toothed shoe may be provided with multiple groove portions 24, which may be two, three, four or more groove portions 24, without much limitation.

[0057] In some optional embodiments of this utility model, such as Figure 2 As shown, the toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21. In this way, when the stator assembly is used in the motor, the noise generated by the motor during operation can be reduced while ensuring the motor efficiency, thereby reducing the noise pollution of the motor to the surrounding environment, improving the user experience, and expanding the application scenarios of the motor.

[0058] like Figure 5 As shown, Figure 5 The function curve in the figure represents the change in the radial dimension Lts of the toothed shoe along the base circle, from the end of the toothed shoe away from the tooth body 21 towards the end of the toothed shoe closer to the tooth body 21, as the angle θ changes. It's important to clarify that the angle θ refers to the angle from the end of the toothed shoe away from the tooth body 21 to the end of the toothed shoe closer to the tooth body 21. In other words, θ is 0 at the end of the toothed shoe away from the tooth body 21.

[0059] Among them, at the groove 24, the toothed shoe has a minimum value in the radial direction of the base circle.

[0060] It is important to clarify here that a local minimum refers to the function value at a point being less than or equal to the function values ​​on either side of that point, rather than the function value at that point being the minimum value.

[0061] As shown in Table (b), as θ increases from 0 to 3, the size Lts of the toothed shoe in the radial direction of the base circle gradually increases. As θ increases from 3 to 3.5, the size Lts of the toothed shoe in the radial direction of the base circle gradually decreases. When θ is between 3.5 and 4.0, the size Lts of the toothed shoe in the radial direction of the base circle is 1.5 mm. When θ increases from 4.0 to 5.0, the size Lts of the toothed shoe in the radial direction of the base circle gradually increases. That is, when θ is between 3.5 and 4.0, the function reaches a minimum value, which is the size of Lts at the groove 24 on the toothed shoe.

[0062]

[0063]

[0064] Table (b)

[0065] In some embodiments, such as Figure 2As shown, at least two tooth shoes in the stator tooth section 20 are a first tooth shoe 22 and a second tooth shoe 23. The first tooth shoe 22 and the second tooth shoe 23 are respectively provided on both sides of the end of the tooth body 21 facing the center of the base circle. The first tooth shoe 22 and the second tooth shoe 23 are provided with a groove 24 on the side facing the stator slot 30, so as to fully reduce the magnetic leakage of the motor under heavy load by using multiple grooves 24.

[0066] In some embodiments, the first toothed shoe 22 is provided with a groove 24, and the radial dimension of the first toothed shoe 22 in the base circle gradually decreases from the side of the groove 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0067] What needs to be explained here is that, Figure 2 As shown, in the axial section of the stator core 100, the first toothed shoe 22 includes a first edge line 222 and a second edge line 223. The first edge line 222 extends circumferentially along the base circle, and the second edge line 223 extends radially along the base. When the first edge line 222 and the second edge line 223 intersect, the second edge line 223 is the minimum dimension of the first toothed shoe 22 in the radial direction of the base circle within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0068] When the first edge line 222 and the second edge line 223 are connected by a rounded corner, it is necessary to extend the first edge line 222 and the second edge line 223 to determine the intersection point of the first edge line 222 and the second edge line 223. Within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the tooth shoe away from the tooth body 21, the minimum dimension of the first tooth shoe 22 in the radial direction of the base circle is the length of the line connecting the endpoint of the second edge line 223 away from the intersection point and the intersection point.

[0069] In some embodiments, the second toothed shoe 23 is provided with a groove 24, and the radial dimension of the second toothed shoe 23 in the base circle gradually decreases from the side of the groove 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0070] What needs to be explained here is that, Figure 2 As shown, in the axial section of the stator core 100, the second toothed shoe 23 includes a third edge line 232 and a fourth edge line 233. The third edge line 232 extends circumferentially along the base circle, and the fourth edge line 233 extends radially along the base circle. When the third edge line 232 and the fourth edge line 233 intersect, the fourth edge line 233 is the minimum dimension of the second toothed shoe 23 in the radial direction of the base circle within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0071] When the third edge line 232 and the fourth edge line 233 are connected by a rounded corner, it is necessary to extend the third edge line 232 and the fourth edge line 233 to determine the intersection point of the third edge line 232 and the fourth edge line 233. Within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the tooth shoe away from the tooth body 21, the minimum dimension of the second tooth shoe 23 in the radial direction of the base circle is the length of the line connecting the end point of the fourth edge line 233 away from the intersection point and the intersection point.

[0072] In some specific embodiments of this utility model, such as Figure 2 As shown, in two adjacent stator tooth sections 20, the first tooth shoe 22 of one stator tooth section 20 is adjacent to and spaced apart from the second tooth shoe 23 of the other stator tooth section 20 to define the slot opening 301 of the stator slot 30. The stator winding is adapted to enter the stator slot 30 through the slot opening 301 to wind the stator winding on the stator tooth section 20.

[0073] In some specific embodiments of this utility model, such as Figure 3 As shown, in two adjacent stator teeth 20, the first tooth shoe 22 of one stator tooth 20 is adjacent to and connected to the second tooth shoe 23 of the other stator tooth 20.

[0074] In some embodiments of this utility model, such as Figure 1 As shown, the stator core 100 also includes a stator yoke 10, which is an annular structure. Multiple stator teeth 20 are arranged on the inner circumferential surface of the stator yoke 10 along the circumference of the stator yoke 10, so as to reasonably arrange multiple stator dimensions within the stator yoke 10.

[0075] In some embodiments of this utility model, in the axial section of the stator core 100, the multiple stator teeth 20 have the same structure and are evenly distributed with the center of the base circle as the center of symmetry, so as to evenly arrange the positions of the multiple stator teeth 20.

[0076] In the axial section of the stator core 100, the outline of one end of multiple stator teeth 20 facing the center of the base circle is located on the base circle. This ensures motor efficiency while reducing the noise generated by the motor during operation when the stator assembly is used in the motor.

[0077] In some embodiments, such as Figure 2 As shown, at least two toothed shoes in the stator tooth section 20 are a first toothed shoe 22 and a second toothed shoe 23. In the axial section of the stator core 100, the first toothed shoe 22 includes a first profile line 221 on the side of the axis facing the base circle, and the second toothed shoe 23 includes a second profile line 231 on the side of the axis facing the base circle. The first profile line 221 is on the base circle, and the second profile line 231 is outside the base circle.

[0078] Specifically, during the manufacturing of the stator core 100, the portion of the stator tooth 20 facing the axis of the stator yoke 10 can be cut to form a second toothed shoe 23. This makes the first contour line 221 of the first toothed shoe 22 on the base circle, while the second contour line 231 of the second toothed shoe 23 is outside the base circle. This makes it easier to optimize the noise generated by the motor when the stator core 100 is used in a motor, thereby reducing the noise pollution of the motor to the surrounding environment and expanding the application scenarios of the motor.

[0079] In some embodiments of this utility model, the stator core 100 includes a plurality of stator laminations stacked along its axial direction. The stator laminations are integrally formed parts. Compared with an integral stator core 100, this simplifies manufacturing and assembly and improves production efficiency.

[0080] Meanwhile, by adjusting the number of stator laminations and the stacking method, motors of different specifications can be flexibly designed, which has significant advantages in improving motor reliability and economy.

[0081] In some embodiments of this utility model, the stator core 100 includes a plurality of stator shaft segments arranged along its axial direction. Each stator shaft segment is formed by stacking a plurality of stator laminations along the thickness direction of the stator laminations. Each stator slot 30 includes a plurality of slot segments arranged along the axial direction of the stator core 100. The plurality of stator shaft segments define the plurality of slot segments of the stator slot 30 in a one-to-one correspondence. In each stator slot 30, the plurality of slot segments have different dimensions.

[0082] By varying the dimensions of multiple slot segments, it is easier to optimize the stator winding, thereby reducing the resistance of the stator winding. This makes it easier to improve the efficiency of the motor when the stator core 100 is used in the motor.

[0083] In some embodiments, each stator lamination includes an annular segmented yoke and segmented teeth, with a segmented groove formed between two adjacent segmented teeth. Multiple segmented yokes are arranged along the axial direction of the stator core 100 to form a stator yoke 10, multiple segmented teeth are arranged along the axial direction of the stator core 100 to form a stator tooth 20, and multiple segmented grooves are arranged along the axial direction of the stator core 100 to form a stator groove 30.

[0084] The segmented toothed portion includes a body structure and protruding structures. One end of the body structure is connected to the inner circumferential surface of the segmented yoke. The ends of the body structure away from the segmented yoke are respectively provided with a first protruding structure and a second protruding structure. Two adjacent protruding structures define the slot opening of the segmented groove. Among them, multiple body structures arranged axially in the stator core 100 define the toothed body 21, and multiple protruding structures arranged axially in the stator core 100 define the first tooth shoe 22 and the second tooth shoe 23, respectively.

[0085] Among them, the protruding structure on the stator lamination has a groove on the side facing the stator slot 30. When the stator assembly is used in the motor and the motor is under heavy load and the magnetic flux is saturated, the groove 24 can reduce the leakage flux of the motor under heavy load, thereby improving the efficiency of the motor, increasing the overload capacity of the motor and improving the torque linearity of the motor, which is beneficial to improving the performance of the motor.

[0086] In some optional embodiments of this utility model, the number of stator laminations in multiple stator shaft segments may be the same or different, and the size of the stator laminations in each stator shaft segment is the same.

[0087] In some embodiments, the stator laminations in each stator shaft segment are of the same size, while the stator laminations in different stator shaft segments are of different sizes. By using stator laminations of different sizes, it is easier to optimize the stator winding and reduce the resistance of the stator winding. This makes it easier to improve the efficiency of the motor when the stator assembly is used in the motor.

[0088] In some optional embodiments of this utility model, such as Figure 1 As shown, in the axial section of the stator core 100, the slot segment includes a first sidewall 31 and a second sidewall 32 arranged opposite to each other in the circumferential direction of the base circle. In two adjacent stator shaft segments, the projected interval distance of the first sidewall 31 of the two corresponding slot segments is 0.4mm to 0.8mm, and the projected interval distance of the second sidewall 32 of the two corresponding slot segments is 0.4mm to 0.8mm. This facilitates the optimization of the stator winding winding and reduces the resistance of the stator winding. This makes it easier to improve the efficiency of the motor when the stator assembly is used in the motor.

[0089] Specifically, the two slot segments with opposite positions refer to two slot segments that are adjacent in the axial direction of the base circle. In the axial section of the stator core 100, the projected interval distance of the first sidewall 31 on the same side of the two slot segments is 0.4mm to 0.8mm, and the projected interval distance of the second sidewall 32 on the same side of the two slot segments is 0.4mm to 0.8mm.

[0090] The stator assembly according to another embodiment of the present invention is described below. The stator assembly according to the embodiment of the present invention includes a mounting bracket and a plurality of stator teeth 20.

[0091] Multiple stator teeth 20 are disposed on a mounting bracket and are arranged at intervals along a base circle to fix the position of the multiple stator teeth 20 and to arrange the multiple stator teeth 20.

[0092] A stator slot 30 is formed between two adjacent stator teeth 20. The stator teeth 20 includes a tooth body 21 and a tooth shoe. The tooth body 21 extends radially along the base circle. The tooth shoe is located on at least one side of the end of the tooth body 21 facing the center of the base circle. The tooth shoe has a groove 24 on the side facing the stator slot 30.

[0093] In the case of the stator assembly being used in a motor, when the motor is under heavy load and the magnetic flux is saturated, the groove 24 provided on the tooth shoe can reduce the leakage flux of the motor under heavy load, thereby improving the efficiency of the motor, increasing the overload capacity of the motor and improving the torque linearity of the motor, which is beneficial to improving the performance of the motor.

[0094] like Figure 4 As shown in Table (a), a comparative embodiment is introduced here, in which the toothed shoe does not have a groove 24. The toothed shoe in this application has a groove 24.

[0095] in, Figure 4 S1 in the equation refers to the relationship between the motor's current and torque when the toothed shoe does not have the groove 24. Figure 4 S2 in the equation represents the relationship between the motor current and torque when the toothed shoe has a groove 24.

[0096] By analyzing the data in Table (a) and Figure 3 A comparison of the function curves shows that, compared to the comparative scheme, by setting the groove 24 on the toothed shoe, the motor torque in this embodiment is greater under the same current, thereby improving the motor's overload capacity and improving the motor's performance.

[0097]

[0098] Table (a)

[0099] According to the stator assembly of this utility model embodiment, by providing a groove 24 on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of motor efficiency, overload capacity, and torque linearity, which is beneficial to improving motor performance.

[0100] The stator assembly according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0101] In some specific embodiments of this utility model, the stator assembly includes a mounting bracket and a plurality of stator teeth 20.

[0102] In some embodiments of this utility model, such as Figure 2 As shown, the groove 24 is located near the tooth body 21 of the toothed shoe.

[0103] In the case of the stator assembly being used in a motor, when the motor is under heavy load and the magnetic flux is saturated, the groove 24 is set at the position of the tooth shoe close to the tooth body 21. This helps to reduce the leakage flux of the motor under heavy load, thereby improving the efficiency of the motor, increasing the overload capacity of the motor, and improving the torque linearity of the motor, which is beneficial to improving the performance of the motor.

[0104] In some embodiments, a toothed shoe may be provided with one groove portion 24, or a toothed shoe may be provided with multiple groove portions 24, which may be two, three, four or more groove portions 24, without much limitation.

[0105] In some optional embodiments of this utility model, such as Figure 2 As shown, the toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21. In this way, when the stator assembly is used in the motor, the noise generated by the motor during operation can be reduced while ensuring the motor efficiency, thereby reducing the noise pollution of the motor to the surrounding environment, improving the user experience, and expanding the application scenarios of the motor.

[0106] like Figure 5 As shown, Figure 5 The function curve in the figure represents the change in the radial dimension Lts of the toothed shoe along the base circle, from the end of the toothed shoe away from the tooth body 21 towards the end of the toothed shoe closer to the tooth body 21, as the angle θ changes. It's important to clarify that the angle θ refers to the angle from the end of the toothed shoe away from the tooth body 21 to the end of the toothed shoe closer to the tooth body 21. In other words, θ is 0 at the end of the toothed shoe away from the tooth body 21.

[0107] Among them, at the groove 24, the toothed shoe has a minimum value in the radial direction of the base circle.

[0108] It is important to clarify here that a local minimum refers to the function value at a point being less than or equal to the function values ​​on either side of that point, rather than the function value at that point being the minimum value.

[0109] As shown in Table (b), as θ increases from 0 to 3, the size Lts of the toothed shoe in the radial direction of the base circle gradually increases. As θ increases from 3 to 3.5, the size Lts of the toothed shoe in the radial direction of the base circle gradually decreases. When θ is between 3.5 and 4.0, the size Lts of the toothed shoe in the radial direction of the base circle is 1.5 mm. When θ increases from 4.0 to 5.0, the size Lts of the toothed shoe in the radial direction of the base circle gradually increases. That is, when θ is between 3.5 and 4.0, the function reaches a minimum value, which is the size of Lts at the groove 24 on the toothed shoe.

[0110]

[0111]

[0112] Table (b)

[0113] In some embodiments, such as Figure 2 As shown, at least two tooth shoes in the stator tooth section 20 are a first tooth shoe 22 and a second tooth shoe 23. The first tooth shoe 22 and the second tooth shoe 23 are respectively provided on both sides of the end of the tooth body 21 facing the center of the base circle. The first tooth shoe 22 and the second tooth shoe 23 are provided with a groove 24 on the side facing the stator slot 30, so as to fully reduce the magnetic leakage of the motor under heavy load by using multiple grooves 24.

[0114] In some embodiments, the first toothed shoe 22 is provided with a groove 24, and the radial dimension of the first toothed shoe 22 in the base circle gradually decreases from the side of the groove 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0115] What needs to be explained here is that, Figure 2 As shown, in the axial section of the mounting bracket, the first toothed shoe 22 includes a first edge line 222 and a second edge line 223. The first edge line 222 extends circumferentially along the base circle, and the second edge line 223 extends radially along the base. When the first edge line 222 and the second edge line 223 intersect, the second edge line 223 is the minimum dimension of the first toothed shoe 22 in the radial direction of the base circle within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0116] When the first edge line 222 and the second edge line 223 are connected by a rounded corner, it is necessary to extend the first edge line 222 and the second edge line 223 to determine the intersection point of the first edge line 222 and the second edge line 223. Within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the tooth shoe away from the tooth body 21, the minimum dimension of the first tooth shoe 22 in the radial direction of the base circle is the length of the line connecting the endpoint of the second edge line 223 away from the intersection point and the intersection point.

[0117] In some embodiments, the second toothed shoe 23 is provided with a groove 24, and the radial dimension of the second toothed shoe 23 in the base circle gradually decreases from the side of the groove 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0118] What needs to be explained here is that, Figure 2As shown, in the axial section of the mounting bracket, the second toothed shoe 23 includes a third edge line 232 and a fourth edge line 233. The third edge line 232 extends circumferentially along the base circle, and the fourth edge line 233 extends radially along the base circle. When the third edge line 232 and the fourth edge line 233 intersect, the fourth edge line 233 is the minimum dimension of the second toothed shoe 23 in the radial direction of the base circle within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the toothed shoe away from the tooth body 21.

[0119] When the third edge line 232 and the fourth edge line 233 are connected by a rounded corner, it is necessary to extend the third edge line 232 and the fourth edge line 233 to determine the intersection point of the third edge line 232 and the fourth edge line 233. Within the range from the side of the groove portion 24 away from the tooth body 21 to the end of the tooth shoe away from the tooth body 21, the minimum dimension of the second tooth shoe 23 in the radial direction of the base circle is the length of the line connecting the end point of the fourth edge line 233 away from the intersection point and the intersection point.

[0120] In some specific embodiments of this utility model, such as Figure 2 As shown, in two adjacent stator tooth sections 20, the first tooth shoe 22 of one stator tooth section 20 is adjacent to and spaced apart from the second tooth shoe 23 of the other stator tooth section 20 to define the slot opening 301 of the stator slot 30. The stator winding is adapted to enter the stator slot 30 through the slot opening 301 to wind the stator winding on the stator tooth section 20.

[0121] In some specific embodiments of this utility model, such as Figure 3 As shown, in two adjacent stator teeth 20, the first tooth shoe 22 of one stator tooth 20 is adjacent to and connected to the second tooth shoe 23 of the other stator tooth 20.

[0122] In some embodiments of this utility model, the multiple stator teeth 20 have the same structure and are evenly distributed on the mounting bracket with the center of the base circle as the center of symmetry, so as to evenly arrange the positions of the multiple stator teeth 20.

[0123] In the axial section of the mounting bracket, the outline of one end of multiple stator teeth 20 facing the center of the base circle is located on the base circle. This ensures motor efficiency while reducing the noise generated by the motor during operation when the stator assembly is used in the motor.

[0124] In some embodiments, such as Figure 2As shown, at least two toothed shoes in the stator tooth section 20 are a first toothed shoe 22 and a second toothed shoe 23. In the axial section of the mounting bracket, the first toothed shoe 22 includes a first profile line 221 on the side facing the axis of the base circle, and the second toothed shoe 23 includes a second profile line 231 on the side facing the axis of the base circle. The first profile line 221 is on the base circle, and the second profile line 231 is outside the base circle.

[0125] Specifically, when manufacturing the stator tooth 20, the portion of the stator tooth 20 facing the base circle axis can be cut to form the second tooth shoe 23. Thus, the first contour line 221 of the first tooth shoe 22 is on the base circle, while the second contour line 231 of the second tooth shoe 23 is outside the base circle. This makes it easier to optimize the noise generated by the motor when the stator core 100 is used in the motor, thereby reducing the noise pollution of the motor to the surrounding environment and expanding the application scenarios of the motor.

[0126] The following describes a motor according to an embodiment of the present invention. The motor according to an embodiment of the present invention includes a stator assembly according to the above-described embodiments of the present invention.

[0127] According to the embodiments of the present invention, by utilizing the stator assembly according to the above embodiments of the present invention, and by providing a groove 24 on the toothed shoe, the leakage flux of the motor under heavy load can be reduced, thereby facilitating the improvement of the motor's efficiency, overload capacity, and torque linearity, which is beneficial to improving the motor's performance.

[0128] In some embodiments, the motor includes a stator assembly and a rotor assembly. The stator assembly includes a stator core 100 and a stator winding. The stator winding is wound on the stator teeth 20 of the stator core 100, and at least a portion of the stator winding is located in the stator slots 30. The rotor assembly is located inside the stator teeth 20. When the rotor assembly is subjected to a magnetic field, it rotates relative to the stator assembly so that the motor can output torque.

[0129] Other configurations and operations of the motor according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0130] The compressor according to an embodiment of the present invention is described below. The compressor according to an embodiment of the present invention includes a motor according to the above embodiment of the present invention.

[0131] The compressor according to the present invention, by utilizing the motor according to the above embodiment of the present invention, and by providing a groove 24 on the toothed shoe, can reduce the leakage flux of the motor under heavy load, thereby facilitating the improvement of the motor's efficiency, overload capacity, and torque linearity, which is beneficial to improving the motor's performance.

[0132] Other components and operations of the compressor according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0133] The following describes a refrigeration device according to an embodiment of the present invention. The refrigeration device according to an embodiment of the present invention includes a compressor according to the above-described embodiment of the present invention.

[0134] In some embodiments, the refrigeration device is a refrigerator. By providing a groove 24 on the side of the toothed shoe facing the stator slot 30, when the stator assembly is applied to the motor and the motor is under heavy load and the magnetic flux is saturated, providing a groove 24 on the toothed shoe can reduce the leakage flux of the motor under heavy load, thereby facilitating the improvement of motor efficiency, overload capacity, and torque linearity, which is beneficial to improving motor performance. In this way, when setting the size of the motor, the size of the motor can be reduced while ensuring the working load of the motor, thereby reducing the size of the compressor, realizing the miniaturization design of the refrigerator compressor, improving the storage capacity and cost-effectiveness of the refrigerator, and expanding the application scenarios of the refrigerator.

[0135] Other components and operations of the refrigeration equipment according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0136] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0137] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0138] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0139] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0140] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that, The system includes a stator core, which comprises a stator yoke and a plurality of stator teeth. The plurality of stator teeth are disposed on the inner circumferential surface of the stator yoke and are spaced apart along a base circle. In the axial section of the stator core, the outer contour of the stator yoke includes two first straight edges arranged opposite each other in a first direction and two second straight edges arranged opposite each other in a second direction. The second direction is perpendicular to the first direction. The first straight edges and the second straight edges are connected by a connecting edge. The distance between each of the first straight edges and the second straight edges and the axis of the stator core is less than the maximum distance between the connecting edge and the axis of the stator core. A stator slot is formed between two adjacent stator teeth. Each stator tooth includes a tooth body and a tooth shoe. The tooth body extends radially along the base circle, and the tooth shoe is located on at least one side of the end of the tooth body facing the center of the base circle. The toothed shoe has a groove on the side facing the stator slot.

2. The stator assembly according to claim 1, characterized in that, The groove is located on the toothed boot near the tooth body; The toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove away from the tooth body to the end of the toothed shoe away from the tooth body.

3. The stator assembly according to claim 1, characterized in that, At least two of the stator teeth are first toothed shoes and second toothed shoes. The first toothed shoes and the second toothed shoes are respectively located on both sides of the end of the tooth body facing the center of the base circle. The groove portion is provided on the side of the first toothed shoe and the second toothed shoe facing the stator slot.

4. The stator assembly according to claim 3, characterized in that, In two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and spaced apart from the second tooth shoe of the other stator tooth to define the slot opening of the stator groove; Alternatively, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and connected to the second tooth shoe of the other stator tooth.

5. The stator assembly according to any one of claims 1-4, characterized in that, In the axial section of the stator core, the multiple stator teeth have the same structure and are evenly distributed with the center of the base circle as the center of symmetry. The outline of one end of the multiple stator teeth facing the center of the base circle is located on the base circle.

6. The stator assembly according to any one of claims 1-4, characterized in that, The stator core includes multiple stator laminations stacked along the axial direction, and the stator laminations are integrally formed parts.

7. A stator assembly, characterized in that, The device includes a mounting bracket and multiple stator teeth. The multiple stator teeth are disposed on the mounting bracket and arranged at circumferential intervals along a base circle. There is a stator slot between two adjacent stator teeth. Each stator tooth includes a tooth body and a tooth shoe. The tooth body extends radially along the base circle, and the tooth shoe is disposed on at least one side of the end of the tooth body facing the center of the base circle. The toothed shoe has a groove on the side facing the stator slot.

8. The stator assembly according to claim 7, characterized in that, The groove is located on the toothed boot near the tooth body; The toothed shoe extends circumferentially along the base circle, and the radial dimension of the toothed shoe on the base circle gradually decreases from the side of the groove away from the tooth body to the end of the toothed shoe away from the tooth body.

9. The stator assembly according to claim 7, characterized in that, At least two of the stator teeth are first toothed shoes and second toothed shoes. The first toothed shoes and the second toothed shoes are respectively located on both sides of the end of the tooth body facing the center of the base circle. The groove portion is provided on the side of the first toothed shoe and the second toothed shoe facing the stator slot.

10. The stator assembly according to claim 9, characterized in that, In two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and spaced apart from the second tooth shoe of the other stator tooth to define the slot opening of the stator groove; Alternatively, in two adjacent stator teeth, the first tooth shoe of one stator tooth is adjacent to and connected to the second tooth shoe of the other stator tooth.

11. An electric motor, characterized in that, Includes the stator assembly according to any one of claims 1-10.

12. A compressor, characterized in that, Includes the motor as described in claim 11.

13. A refrigeration device, characterized in that, Includes the compressor as described in claim 12.

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