Motor and compressor

Abstract

The utility model discloses a motor and a compressor, and relates to the technical field of motors, the motor comprises a stator punching sheet, the stator punching sheet comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are arranged on the inner circumferential surface of the yoke part at intervals, a stator groove is formed between the adjacent tooth parts, and the periphery of the yoke part is composed of a plurality of straight edge sections and a plurality of arc edge sections; the maximum outer diameter of the stator punching sheet is L1, two times of the minimum distance from the center of the stator punching sheet to the straight edge section is L2, the area of the first surface of the stator punching sheet is S2, the sum of the areas of all the stator grooves is S3, L1 and S3 meet the condition that S3 / (pi (L1 / 2) 2) is larger than or equal to 0.2 and smaller than or equal to 0.3, L2 and S3 meet the condition that S3 / (pi (L2 / 2) 2) is larger than or equal to 0.24 and smaller than or equal to 0.34, and S3 and S2 meet the condition that S3 / S2 is larger than or equal to 0.4 and smaller than or equal to 0.6. According to the technical scheme of the utility model, the size of the stator punching sheet and the area of the stator groove are reasonably designed, so that the motor efficiency of the motor with the stator punching sheet is improved, the heating value of the motor is reduced, and the reliability and the stability of the motor in the operation process are improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor and a compressor. Background Technology

[0002] Induction motors are widely used in household appliances, industrial equipment, and office automation equipment, especially in air conditioner compressors. Traditional induction motors typically use copper wire windings. Although copper wire has good conductivity, it is expensive and heavy. Furthermore, copper accounts for only 0.0068% of the Earth's crust, a relatively small amount, yet its demand is significant in industries such as electrical, electronics, transportation, and construction. In contrast, aluminum accounts for 8.23% of the Earth's crust, making it the third most abundant element, and its resources are very plentiful. To reduce resource consumption, lower costs, and reduce weight, aluminum wire is increasingly being used in the manufacture of induction motors. However, because aluminum wire has lower conductivity than copper wire, the design of aluminum wire induction motors requires optimization of the motor's structure to ensure that its performance is not affected.

[0003] In the design of aluminum wire induction motors, the ratio of stator slot area to stator lamination area is a critical parameter. Both excessively small and excessively large stator slot areas negatively impact motor performance. Too small a slot area increases winding resistance, leading to low efficiency and high heat generation. Conversely, an excessively large slot area reduces the mechanical strength and reliability of the stator laminations. Furthermore, the reduced space in the teeth and yoke increases magnetic reluctance, requiring a higher excitation current to achieve rated torque, resulting in lower efficiency and higher heat generation. Therefore, determining a reasonable ratio of stator slot area to stator lamination area is crucial for the design of aluminum wire single-phase induction motors. Utility Model Content

[0004] The main purpose of this invention is to propose a motor and compressor that aim to improve the motor efficiency of an aluminum wire induction motor.

[0005] To achieve the above objectives, the motor proposed in this utility model includes:

[0006] A stator lamination includes a yoke and multiple teeth, the multiple teeth being spaced apart on the inner periphery of the yoke, and stator slots being formed between adjacent teeth. The outer periphery of the yoke is composed of multiple straight edge segments and multiple arc edge segments.

[0007] Wherein, the maximum outer diameter of the stator lamination is L1, twice the minimum distance from the center of the stator lamination to the straight edge segment is L2, the stator lamination has a first surface with an area of ​​S2, the sum of the areas of all the stator slots is S3, and L1 and S3 satisfy 0.2≤S3 / (π(L1 / 2)). 2If 0.24 ≤ S3 / (π(L2 / 2)), then L2 and S3 satisfy 0.24 ≤ S3 / (π(L2 / 2)). 2 )≤0.34, and S3 and S2 satisfy 0.4≤S3 / S2≤0.6.

[0008] In one embodiment, the inner diameter of the tooth is L3, and L3 and S3 satisfy 0.80 ≤ S3 / (π(L3 / 2)). 2 )≤1.05.

[0009] In one embodiment, the motor further includes a rotor lamination disposed in the middle of the stator lamination, the rotor lamination having a second surface with an area of ​​S4, wherein S3 and S4 satisfy 1.3≤S3 / S4≤1.8.

[0010] In one embodiment, the rotor lamination has a plurality of rotor slots, the sum of the areas of all the rotor slots is S5, and S3 and S5 satisfy 3≤S3 / S5≤5.

[0011] In one embodiment, L1 satisfies 30mm≤L1≤200mm.

[0012] In one embodiment, L3 satisfies 30mm≤L3≤100mm.

[0013] In one embodiment, S3 satisfies 1200mm 2 ≤S3≤3600mm 2 .

[0014] In one embodiment, L1 and L2 satisfy: L1 > L2.

[0015] In one embodiment, L1 and L2 satisfy 2mm≤L1-L2≤30mm.

[0016] In one embodiment, two of the plurality of straight edge segments are separated by at least one arc edge segment, and the maximum included angle formed by the line connecting the midpoint of the two straight edge segments and the center of the stator lamination is A, wherein 120°≤A≤180°.

[0017] In one embodiment, the two straight edge segments are arranged opposite each other in the radial direction of the stator lamination.

[0018] In one embodiment, two of the plurality of straight edge segments are spaced apart by at least one arc edge segment, and the two straight edge segments are arranged opposite each other in the radial direction of the stator lamination.

[0019] This utility model also proposes a compressor, which includes a motor, and the motor includes stator laminations. Each stator lamination includes a yoke and multiple teeth, the teeth being spaced apart on the inner circumference of the yoke, with adjacent teeth forming stator slots. The outer circumference of the yoke is composed of multiple straight edge segments and multiple arc edge segments. The maximum outer diameter of the stator lamination is L1, and twice the minimum distance from the center of the stator lamination to the straight edge segment is L2. The stator lamination has a first surface with an area of ​​S2, and the sum of the areas of all the stator slots is S3. L1 and S3 satisfy 0.2 ≤ S3 / (π(L1 / 2)). 2 If 0.24 ≤ S3 / (π(L2 / 2)), then L2 and S3 satisfy 0.24 ≤ S3 / (π(L2 / 2)). 2 )≤0.34, and S3 and S2 satisfy 0.4≤S3 / S2≤0.6.

[0020] The technical solution of this utility model improves the motor efficiency of the motor with the stator lamination by adopting a reasonable design of the stator lamination size and stator slot area, thereby reducing the motor heat generation and improving the reliability and stability of the motor during operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the stator laminations and rotor laminations of the motor of this utility model.

[0023] Figure 2 for Figure 1 A schematic diagram of the structure in another embodiment;

[0024] Figure 3 for Figure 1 A structural schematic diagram of yet another embodiment, wherein the shaded portion represents S2;

[0025] Figure 4 for Figure 1 A structural diagram of another embodiment, wherein the shaded area is S3;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure in one embodiment, wherein the shaded area is S4;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure in another embodiment, wherein the shaded area is S5.

[0028] Explanation of icon numbers:

[0029] 1. Stator lamination; 11. Yoke; 111. Outer periphery; 111a. Straight edge section; 111b. Arc edge section; 12. Tooth section; 13. Stator slot; 14. First surface; 2. Rotor lamination; 21. Second surface; 22. Rotor slot.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] Induction motors are widely used in household appliances, industrial equipment, and office automation equipment, especially in air conditioner compressors. Traditional induction motors typically use copper wire windings. Although copper wire has good conductivity, it is expensive and heavy. Furthermore, copper accounts for only 0.0068% of the Earth's crust, a relatively small amount, yet its demand is significant in industries such as electrical, electronics, transportation, and construction. In contrast, aluminum accounts for 8.23% of the Earth's crust, making it the third most abundant element, and its resources are very plentiful. To reduce resource consumption, lower costs, and reduce weight, aluminum wire is increasingly being used in the manufacture of induction motors. However, because aluminum wire has lower conductivity than copper wire, the design of aluminum wire induction motors requires optimization of the motor's structure to ensure that its performance is not affected.

[0035] In the design of aluminum wire induction motors, the ratio of stator slot area to stator lamination area is a critical parameter. Both excessively small and excessively large stator slot areas negatively impact motor performance. Too small a slot area increases winding resistance, leading to low efficiency and high heat generation. Conversely, an excessively large slot area reduces the mechanical strength and reliability of the stator laminations. Furthermore, the reduced space in the teeth and yoke increases magnetic reluctance, requiring a higher excitation current to achieve rated torque, resulting in lower efficiency and higher heat generation. Therefore, determining a reasonable ratio of stator slot area to stator lamination area is crucial for the design of aluminum wire single-phase induction motors.

[0036] In view of this, the present invention proposes an electric motor.

[0037] Please see Figures 1 to 4 In one embodiment of this utility model, the motor includes a stator lamination 1, which includes a yoke 11 and a plurality of teeth 12. The plurality of teeth 12 are spaced apart on the inner periphery of the yoke 11, and stator slots 13 are formed between adjacent teeth 12. The outer periphery 111 of the yoke 11 is composed of a plurality of straight edge segments 111a and a plurality of arc edge segments 111b. The maximum outer diameter of the stator lamination 1 is L1, and twice the minimum distance from the center of the stator lamination 1 to the straight edge segment 111a is L2. The stator lamination 1 has a first surface 14, the area of ​​which is S2, and the sum of the areas of all the stator slots 13 is S3. L1 and S3 satisfy 0.2 ≤ S3 / (π(L1 / 2)). 2 )≤0.3, the L2 and S3 satisfy 0.24≤S3 / (π(L2 / 2)2)≤0.34, the S3 and S2 satisfy 0.4≤S3 / S2≤0.6.

[0038] It should be noted that the stator lamination 1 includes a yoke 11 and a plurality of teeth 12, and the teeth 12 and the yoke 11 are integrally formed. The yoke 11 is generally arranged in a ring shape, and the teeth 12 protrude from the inner circumference of the yoke 11 and are disposed in the middle of the yoke 11. In this embodiment, the number of teeth 12 is set to 24. Of course, the number of teeth 12 can be less than 24 or more than 24. Stator slots 13 are formed between adjacent teeth 12, and the number of stator slots 13 is the same as the number of teeth 12. The slot areas of each stator slot 13 can be the same or different.

[0039] In view of the fact that the motor using the stator lamination 1 is used in the compressor, in order to allow the refrigerant to pass through the outside of the motor and thus achieve a better heat dissipation effect, the outer periphery 111 of the stator lamination 1 is composed of multiple arc edge segments 111b and multiple straight edge segments 111a alternately, so that the refrigerant can pass through the outside of the straight edge segment 111a.

[0040] Specifically, the stator slot 13 is composed of a trapezoid and a semicircle. Therefore, the area of ​​the stator slot 13 is the sum of the areas of the trapezoid and the semicircle. The area at the slot opening of the stator slot 13 is not included in the area of ​​the stator slot 13. S3 should not be too large, as this will reduce the proportion of the stator lamination 1 and thus reduce the structural strength of the stator lamination 1 itself. S3 should also not be too small, as this will increase the resistance of the winding and reduce the efficiency of the motor. Therefore, an appropriate value of S3 should be selected to maintain the high efficiency of the motor.

[0041] In this embodiment, the maximum outer diameter of the stator lamination 1 is L1, where S3 is equal to π(L1 / 2). 2 The ratio is between 0.2 and 0.3. The motor with this stator lamination 1 has good motor efficiency. Specific experimental data are shown in the table below:

[0042]

[0043]

[0044] It can be seen that when S3 is related to π(L1 / 2) 2 When the ratio of S3 to π(L1 / 2) is less than 0.2 or greater than 0.3, the motor efficiency is poor, below 80%, and the heat generation of the winding is high, above 80W. 2 When the ratio of S3 to π(L1 / 2) is between 0.2 and 0.3, the motor efficiency is relatively high, all above 80%, and when S3 is equal to π(L1 / 2)... 2 When the ratio is 0.25, the motor has the highest motor efficiency, which is 82%. At this point, the heat generated by the winding is also the lowest, which is 50W.

[0045] Furthermore, to better define the dimensions of S3 and stator lamination 1, L2 is defined as twice the minimum distance from the center of stator lamination 1 to the straight edge segment 111a. The outer diameter of stator lamination 1 is the sum of the farthest distances from the two oppositely arranged arc edge segments 111b to the center of stator lamination 1. The ratio of S3 to (π(L2 / 2)2) is set between 0.24 and 0.34. Motors with this stator lamination 1 exhibit better motor efficiency. Specific experimental data are shown in the table below.

[0046] <![CDATA[S3 / (π(L2 / 2)2)]]> 0.19 0.24 0.29 0.34 0.39 Motor efficiency (%) 79.4％ 81.2％ 82％ 81.1％ 79.6％ Heat generated by the winding (W) 83W 61W 50W 62W 85W

[0047] It can be seen that when the ratio of S3 to π(L2 / 2)2 is less than 0.24 or greater than 0.34, the motor efficiency is poor, below 80%, and the winding heat generation is high, above 80W. When the ratio of S3 to π(L2 / 2)2 is between 0.24 and 0.34, the motor efficiency is high, all above 80%. The motor has the highest efficiency (82%) when the ratio of S3 to π(L2 / 2)2 is 0.29, and the winding heat generation is also the lowest (50W). Compared to conventional motors, the motor using the stator lamination 1 proposed in this invention has higher efficiency (1% increase) and a 20% reduction in total heat generation compared to conventional motors.

[0048] Furthermore, the area of ​​the first surface 14 is the area of ​​one side of the stator lamination 1. The area of ​​the first surface 14 is calculated by subtracting the area of ​​the circle with diameter L3 from the area of ​​the circle with diameter L2, then subtracting the area of ​​S3, and finally subtracting the area of ​​the shape formed by the extension of the arc edge segment 111b and the straight edge segment 111a. By limiting the ratio of the area S2 of the stator lamination 1 to the area S3 of the multiple stator slots 13 to be between 0.4 and 0.6, it is ensured that the area of ​​the stator slots 13 is not too large, thus giving the stator lamination 1 good structural strength. Conversely, the area of ​​the stator slots 13 is not too small, as the stator slots 13 facilitate heat dissipation from the windings, thereby preventing the motor from overheating.

[0049] The technical solution of this utility model improves the motor efficiency of the motor with the stator lamination 1 by adopting a reasonable design of the size of the stator lamination 1 and the area of ​​the stator slot 13, thereby reducing the heat generation of the motor and improving the reliability and stability of the motor during operation.

[0050] In one embodiment, please refer to Figures 2 to 4 The inner diameter of the tooth 12 is L3, and L3 and S3 satisfy 0.80≤S3 / (π(L3 / 2)2)≤1.05.

[0051] More specifically, to better limit the dimensions of S3 and stator lamination 1, the ratio of S3 to (π(L3 / 2)2) is set between 0.80 and 1.05. Within this range, the motor with stator lamination 1 has better motor efficiency. L3 is the inner diameter of tooth 12, which is the distance between the midpoint of any tooth 12 and the line connecting the center of stator lamination 1 and the corresponding midpoint of tooth 12. Specific experiments are shown in the table below.

[0052] <![CDATA[S3 / (π(L3 / 2)2)]]> 0.7 0.82 0.93 1.02 1.15 Motor efficiency (%) 78.6％ 81％ 82％ 81.2％ 79.1％ Heat generated by the winding (W) 85W 62W 50W 59W 86W

[0053] It can be seen that when the ratio of S3 to π(L3 / 2)2 is less than 0.8 or greater than 1.05, the motor efficiency is poor, below 80%, and the winding heat generation is high, at 85W or above. When the ratio of S3 to π(L3 / 2)2 is between 0.8 and 1.05, the motor efficiency is high, all above 80%. Furthermore, when the ratio of S3 to π(L3 / 2)2 is 0.93, the motor has the highest efficiency at 82%, and the winding heat generation is the lowest, at 50W. Therefore, a ratio of S3 to π(L3 / 2)2 between 0.8 and 1.05 helps improve motor efficiency, reduces winding heat generation, and improves the reliability of motor operation.

[0054] In this embodiment, please refer to Figures 3 to 6 The motor further includes a rotor lamination 2, which is disposed in the middle of the stator lamination 1. The rotor lamination 2 has a second surface 21 with an area of ​​S4, and S3 and S4 satisfy 1.3≤S3 / S4≤1.8.

[0055] Furthermore, the motor is configured as an internal rotor motor, therefore the motor also includes rotor laminations 2. The rotor laminations 2 are located in the middle of the stator laminations 1. The rotor laminations 2 have a second surface 21, which is a surface on one side of the rotor laminations 2. The area of ​​the second surface 21 is S4. The area of ​​S4 is the area of ​​the entire circular surface of the stator laminations 1 minus the area of ​​the central small circle, and then minus the area of ​​S5. By determining the area ratio of the stator laminations 1 and the rotor laminations 2, it is helpful to optimize the fit between the stator and rotor, reduce friction and energy loss, and thus improve the working efficiency of the motor. Therefore, in this embodiment, the ratio of S3 to S4 is set between 1.3 and 1.8, which optimizes electromagnetic performance, improves heat dissipation performance, and enhances the structural stability and reliability of the motor.

[0056] In one embodiment, please continue to refer to Figures 3 to 6 The rotor lamination 2 has multiple rotor slots 22, and the sum of the areas of all the rotor slots 22 is S5. The S3 and the S5 satisfy 3≤S3 / S5≤5.

[0057] It should be noted that the rotor lamination 2 has multiple rotor slots 22. The area of ​​each rotor slot 22 is the sum of the areas of a semicircle and a trapezoid. When the ratio of S3 to S5 is within the aforementioned range, it ensures that the motor has higher electromagnetic coupling efficiency during operation, thereby improving the motor's output torque and efficiency. Furthermore, by optimizing the slot configuration, the motor's heat dissipation efficiency can be improved. This helps ensure that the motor maintains a stable operating state even in harsh working environments, extending the motor's service life and reducing maintenance and replacement costs.

[0058] Optionally, please refer to Figure 1 and Figure 2 The L1 satisfies 30mm≤L1≤200mm.

[0059] Specifically, by limiting L1 to a minimum of 30mm, the motor can maintain a certain degree of structural compactness, avoiding excessively large motor sizes and thus saving space and cost. Furthermore, L1 should not be too large, thereby ensuring the motor's operational reliability. A reasonable range for L1 helps optimize the motor's electromagnetic performance, ensuring a stable electromagnetic distribution and high efficiency during operation.

[0060] In one embodiment, please continue to refer to Figure 1 and Figure 2 The L3 satisfies 30mm≤L3≤100mm.

[0061] Furthermore, limiting the range of L3 helps ensure the structural stability of the motor, preventing vibration and noise caused by structural instability during operation. Moreover, limiting L3 allows for more rational use of materials, avoiding waste and overuse, thus helping to reduce costs.

[0062] In one embodiment, please refer to Figure 4 The S3 satisfies 1200mm 2 ≤S3≤3600mm 2 .

[0063] Understandably, a reasonable stator slot 13 area can ensure that the motor has sufficient heat dissipation area; therefore, the area of ​​stator slot 13 must not be less than 1200 mm². 2 This effectively dissipates the heat generated by the windings, reducing instability and ensuring the reliability of motor operation. Furthermore, by rationally designing the stator slot area, the layout of the heat dissipation channels can be optimized, improving heat dissipation efficiency. This helps ensure that the motor maintains a stable operating temperature under long-term, high-load operation, extending the motor's service life.

[0064] In one embodiment, please refer to Figure 2The L1 and L2 satisfy the condition: L1 > L2. Furthermore, in one embodiment, please refer to... Figure 2 The L1 and L2 satisfy 2mm≤L2-L1≤30mm.

[0065] It should be noted that ensuring L1 is greater than L2 optimizes the internal spatial layout of the motor, making the relative positions of various components more rational and reducing interference and conflict. By limiting the difference between L1 and L2 to between 2mm and 30mm, the difference between these two dimensions can be precisely controlled, ensuring consistency and accuracy in the motor's manufacturing and assembly processes. Furthermore, limiting the difference between L2 and L1 to this range can further improve the motor's stability during operation.

[0066] In one embodiment, please refer to Figure 2 Two of the multiple straight edge segments 111a are separated by at least one arc edge segment 111b, and the maximum included angle formed by the line connecting the midpoint of the two straight edge segments 111a and the center of the stator lamination 1 is A, wherein 120°≤A≤180°.

[0067] It should be noted that the multiple straight edge segments 111a and multiple curved edge segments 111b are arranged alternately, that is, the opposite ends of the straight edge segment 111a are connected to the curved edge segment 111b. In the above embodiment, L2 is the sum of the distances from the two straight edge segments 111a to the stator lamination 1. The number of straight edge segments 111a and curved edge segments 111b can be any value from 2, 3, 4, 5, 6, 7, to 8, and the number of straight edge segments 111a is the same as the number of curved edge segments 111b. When the number of straight edge segments 111a and curved edge segments 111b are both 2, the lines connecting the two straight edge segments 111a to the stator lamination 1 form an angle of 180°, so the maximum angle A is 180°. When the number of straight edge segments 111a and curved edge segments 111b are both 3, the lines connecting the two straight edge segments 111a to the stator lamination 1 form an angle of 120°, so the maximum angle A is 120°. When the number of straight edge segments 111a and curved edge segments 111b are both 4, the lines connecting the two straight edge segments 111a to the stator lamination 1 form angles of 90° and 180°, so the maximum angle A is 180°. From the above examples, it can be concluded that the maximum angle A is within the range of 120° to 180°.

[0068] Furthermore, in one embodiment, the two straight edge segments 111a are arranged opposite each other in the radial direction of the stator lamination 1.

[0069] For details, please continue reading Figure 2The stator lamination 1 has four straight edge segments 111a and four curved edge segments 111b, which are staggered. The four straight edge segments 111a are divided into two groups, with the two straight edge segments 111a forming the largest included angle A positioned opposite each other in the radial direction of the stator lamination 1. Therefore, L2 is the distance between the two straight edge segments 111a in any group of straight edge segments 111a.

[0070] This utility model also proposes a compressor, which includes a motor. The specific structure of the motor is as described in the above embodiments. Since this compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electric motor, characterized in that, include: A stator lamination includes a yoke and multiple teeth, the multiple teeth being spaced apart on the inner periphery of the yoke, and stator slots being formed between adjacent teeth. The outer periphery of the yoke is composed of multiple straight edge segments and multiple arc edge segments. Wherein, the maximum outer diameter of the stator lamination is L1, twice the minimum distance from the center of the stator lamination to the straight edge segment is L2, the stator lamination has a first surface with an area of ​​S2, the sum of the areas of all the stator slots is S3, and L1 and S3 satisfy 0.2≤S3 / (π(L1 / 2)). 2 If 0.24 ≤ S3 / (π(L2 / 2)), then L2 and S3 satisfy 0.24 ≤ S3 / (π(L2 / 2)). 2 ≤0.34, wherein S3 and S2 satisfy 0.4≤S3 / S2≤0.

6.

2. The motor as described in claim 1, characterized in that, The inner diameter of the tooth is L3, and L3 and S3 satisfy 0.80≤S3 / (π(L3 / 2)). 2 )≤1.

05.

3. The motor as described in claim 1, characterized in that, The motor further includes a rotor lamination, which is disposed in the middle of the stator lamination. The rotor lamination has a second surface with an area of ​​S4, and S3 and S4 satisfy 1.3≤S3 / S4≤1.

8.

4. The motor as described in claim 3, characterized in that, The rotor lamination has multiple rotor slots, and the sum of the areas of all the rotor slots is S5. S3 and S5 satisfy 3≤S3 / S5≤5.

5. The motor as described in claim 1, characterized in that, The L1 satisfies 30mm≤L1≤200mm.

6. The motor as described in claim 5, characterized in that, The L3 satisfies 30mm≤L3≤100mm.

7. The motor as described in claim 6, characterized in that, The S3 satisfies 1200mm 2 ≤S3≤3600mm 2 .

8. The motor as described in claim 1, characterized in that, The L1 and L2 satisfy the condition: L1 > L2.

9. The motor as described in claim 8, characterized in that, The L1 and L2 satisfy 2mm≤L1-L2≤30mm.

10. The motor as described in claim 1, characterized in that, Two of the plurality of straight edge segments are separated by at least one arc edge segment, and the maximum included angle formed by the line connecting the midpoint of the two straight edge segments and the center of the stator lamination is A, wherein 120°≤A≤180°.

11. The motor as described in claim 10, characterized in that, The two straight edge segments are arranged opposite each other in the radial direction of the stator lamination.

12. A compressor, characterized in that, Including the motor as described in any one of claims 1 to 11.

Images