Stator punching sheet, stator, motor and compressor

Abstract

The utility model discloses a stator punching sheet, a stator, a motor and a compressor, and relates to the technical field of motors, the stator punching sheet comprises a yoke part and a plurality of stator teeth, the plurality of stator teeth are arranged on the inner side of the yoke part at intervals, a stator groove is formed between two adjacent stator teeth, and the stator teeth are arranged in the stator groove. Each stator tooth comprises a tooth body, a first tooth boot and a second tooth boot, the first tooth boot and the second tooth boot are arranged on the two sides of the free end of the tooth body respectively, the height of the free end of the first tooth boot in the radial direction is h1, the height of the free end of the second tooth boot in the radial direction is h2, and the formula is as follows: 1lt; h2 / h1 < = 3.5. The technical scheme provided by the utility model can adjust the magnetic field distribution, so that more magnetic lines pass through the second tooth boot, thereby reducing the magnetic saturation degree of the first tooth boot, reducing the iron loss of the tooth boots, and improving the efficiency of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a stator punching sheet, a stator, a motor and a compressor. Background Art

[0002] A permanent magnet motor generally includes a stator and a rotor that can rotate relative to the stator. The stator includes a stator core and windings wound around the stator core. The stator core is formed by laminating a plurality of stator punching sheets. The stator punching sheet includes stator teeth, and two tooth boots extending outwards from both sides are respectively arranged at the end of the tooth body of the stator teeth. In the prior art, the tooth boots are prone to magnetic circuit saturation, resulting in increased motor loss and low efficiency. Content of the Utility Model

[0003] The main object of the utility model is to propose a stator punching sheet, aiming to avoid magnetic circuit saturation of the tooth boots.

[0004] To achieve the above object, the stator punching sheet proposed by the utility model includes:

[0005] A yoke; and

[0006] A plurality of stator teeth, the plurality of stator teeth are arranged at intervals inside the yoke, a stator slot is formed between two adjacent stator teeth, the stator teeth include a tooth body, and a first tooth boot and a second tooth boot respectively arranged on both sides of the free end of the tooth body. The height of the free end of the first tooth boot in the radial direction is h1, and the height of the free end of the second tooth boot in the radial direction is h2, satisfying: 1 < h2 / h1 ≤ 3.5.

[0007] In an embodiment, 1.3 ≤ h2 / h1 ≤ 3.5.

[0008] In an embodiment, the range of h1 is 0.5 ≤ h1 ≤ 1.5.

[0009] In an embodiment, the range of h2 is 0.5 ≤ h2 ≤ 1.5.

[0010] In an embodiment, the radial cross-sectional area of the first tooth boot is S1, and the radial cross-sectional area of the second tooth boot is S2, satisfying: S2 > S1.

[0011] In an embodiment, the length of the starting end of the first tooth boot along the extending direction of the tooth body is c1, and the perpendicular distance from the end face of the first tooth boot to the groove center line of the closest stator slot in the radial direction is w1, satisfying 1.1 ≤ c1 / w1 ≤ 4.

[0012] In one embodiment, the length of the starting end of the second toothed shoe along the extension direction of the tooth body is c2, and the vertical distance from the end face of the second toothed shoe to the center line of the nearest stator slot in the radial direction is w2, where 1.1≤c2 / w2≤4.

[0013] In one embodiment, the ratio of w1 to w2 satisfies 1 ≤ w1 / w2 ≤ 1.2.

[0014] In one embodiment, the angle between the first toothed shoe and the tooth body is A, and the angle between the second toothed shoe and the tooth body is B, satisfying 90≤A≤150 and 90≤B≤150.

[0015] This utility model also proposes a stator, including the stator laminations described above.

[0016] In one embodiment, the stator further includes an end plate, the end plate having a first adapter portion and a second adapter portion respectively corresponding to the first toothed shoe and the second toothed shoe, the radial height of the free end of the first adapter portion being b1, and the radial height of the free end of the second adapter portion being b2, satisfying 1.1≤b1 / h1≤3, 0.8≤b2 / h2≤1.

[0017] This utility model also proposes an electric motor, including the stator described above.

[0018] This utility model also proposes a compressor, including the aforementioned motor.

[0019] The technical solution of this utility model limits the ratio of the radial height h2 of the free end of the second toothed shoe to the radial height h1 of the free end of the first toothed shoe to be greater than 1 and less than or equal to 3.5. Therefore, the radial height h2 of the free end of the second toothed shoe is greater than the radial height h1 of the free end of the first toothed shoe. In this embodiment, the second toothed shoe is located on one side of the rotation direction of the tooth body's centerline, and the first toothed shoe is located on the opposite rotation direction side of the tooth body's centerline. By making the height of the second toothed shoe on the rotation direction side greater than that of the first toothed shoe on the opposite rotation direction side, this solution can adjust the magnetic field distribution, allowing more magnetic lines of force to pass through the second toothed shoe, thereby reducing the magnetic saturation of the first toothed shoe, reducing iron loss in the toothed shoe, and improving motor efficiency. Attached Figure Description

[0020] 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.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the stator lamination provided by this utility model;

[0022] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 for Figure 1 A partial structural schematic diagram of the provided stator lamination;

[0024] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0025] Figure 5 This is a schematic diagram of the radial cross-section of the stator provided by this utility model;

[0026] Figure 6 for Figure 5 A partial structural diagram of the stator end plate is provided.

[0027] Figure 7 A graph showing the efficiency of a motor using the stator laminations provided by this invention as a function of h2 / h1;

[0028] Figure 8 A comparison chart of the COP of a compressor using the stator laminations of this solution and a compressor using existing technology under different operating conditions.

[0029] Explanation of icon numbers:

[0030] 10. Stator: 100. Stator lamination; 110. Yoke; 120. Stator tooth; 121. Tooth body; 122. First tooth shoe; 123. Second tooth shoe; 130. Stator slot; 200. End plate; 210. First adapter; 220. Second adapter; 300. Winding.

[0031] 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

[0032] 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.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] A permanent magnet motor generally includes a stator and a rotor that can rotate relative to the stator. The stator includes a stator core and windings wound around the stator core. The stator core is formed by laminating a plurality of stator punching sheets. The stator punching sheet includes stator teeth, and the end of the tooth body of the stator teeth has two tooth boots extending outwards on both sides respectively. The tooth boots in the prior art are prone to magnetic circuit saturation, resulting in increased motor loss and low efficiency.

[0036] In order to solve the problem of magnetic saturation of the tooth boots, the present utility model proposes a stator punching sheet 100.

[0037] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the stator punching sheet 100 includes a yoke portion 110 and a plurality of stator teeth 120. The plurality of stator teeth 120 are arranged at intervals inside the yoke portion 110. A stator slot 130 is formed between two adjacent stator teeth 120. The stator teeth 120 include a tooth body 121, and a first tooth boot 122 and a second tooth boot 123 respectively arranged on both sides of the free end of the tooth body 121. The height of the free end of the first tooth boot 122 in the radial direction is h1, and the height of the free end of the second tooth boot 123 in the radial direction is h2, satisfying: 1 < h2 / h1 ≤ 3.5.

[0038] The technical solution of this utility model limits the ratio of the radial height h2 of the free end of the second toothed shoe 123 to the radial height h1 of the free end of the first toothed shoe 122 to be greater than 1 and less than or equal to 3.5. Therefore, the radial height h2 of the free end of the second toothed shoe 123 is greater than the radial height h1 of the free end of the first toothed shoe 122. In this embodiment, the second toothed shoe 123 is located on one side of the rotation direction of the centerline of the tooth body 121, and the first toothed shoe 122 is located on the side of the centerline of the tooth body 121 in the opposite rotation direction. By making the height of the second toothed shoe 123 on the rotation direction side greater than that of the first toothed shoe 122 on the opposite rotation direction side, this solution can adjust the magnetic field distribution, allowing more magnetic lines of force to pass through the second toothed shoe 123, thereby reducing the saturation degree of the first toothed shoe 122, reducing toothed shoe iron loss, and improving motor efficiency.

[0039] Furthermore, in this embodiment, 1.3≤h2 / h1≤3.5, which can improve motor efficiency.

[0040] Reference Figure 7 , Figure 7 This is a schematic diagram showing the change of motor efficiency with h2 / h1 at 30Hz, referring to... Figure 7 It can be seen that when 1.3≤h2 / h1≤3.5, the motor efficiency reaches more than 92.4%. However, considering the difficulty of processing and manufacturing, h2 / h1 can be relaxed to 1≤h2 / h1≤3.5.

[0041] Reference Figure 8 , Figure 8 A comparison chart of the COP of a compressor using the stator lamination 100 of this solution and a compressor using existing technology under different operating conditions is provided, with reference to... Figure 8 It can be seen that the COP of the compressor using the stator lamination 100 of this solution is greater than that of the compressor of the prior art under SEER30, SEER60 and SEER90 conditions.

[0042] It should be noted that when the end of the first toothed shoe 122 has a chamfer, h1 includes the chamfer height of the end of the first toothed shoe 122. If the end of the first toothed shoe 122 does not have a chamfer, then h1 represents the height of the end face of the end of the first toothed shoe 122 in the radial direction. That is, draw an auxiliary line in the radial direction through the center point of the end face of the end of the first toothed shoe 122, where the center point is the intersection of the diagonals of the four corners of the end face. The auxiliary line intersects the two sides of the end face in the radial direction at two points, one of which is the first starting point and the other is the first ending point. h1 represents the distance from the first starting point to the first ending point. Similarly, when the end of the second toothed shoe 123 has a chamfer, h2 also includes the chamfer height of the end of the second toothed shoe 123. If the end of the second toothed shoe 123 does not have a chamfer, then h2 represents the height of the end face of the end of the second toothed shoe 123 in the radial direction. The actual measurement method of h2 is the same as h1.

[0043] In this embodiment, the lengths of the end faces of the first toothed shoe 122 and the second toothed shoe 123 facing away from the stator slot 130 in the circumferential direction are equal.

[0044] It is understandable that if the height of the toothed shoe is too small, it will lead to manufacturing difficulties; if it is too large, it will reduce the space within the stator slot 130, reduce the amount of winding 300, and increase the loss of winding 300. To balance these two factors, this solution limits the range of h1 to 0.5 ≤ h1 ≤ 1.5 and the range of h2 to 0.5 ≤ h2 ≤ 1.5. This helps to balance the manufacturing difficulty and the space within the stator slot 130, increasing the space within the stator slot 130 while maintaining manufacturing efficiency, thus increasing the amount of winding 300 and reducing winding 300 losses, thereby improving motor efficiency.

[0045] Moreover, h1 and h2 within this range can reduce magnetic flux leakage, improve magnetic field utilization, and enhance motor efficiency.

[0046] Reference Figure 3 and Figure 4 Optionally, the radial cross-sectional area of ​​the first toothed shoe 122 is S1, and the radial cross-sectional area of ​​the second toothed shoe 123 is S2, satisfying that S2>S1. This further restricts the second toothed shoe 123 from being larger than the first toothed shoe 122, making the magnetic flux through the second toothed shoe 123 greater than the magnetic flux through the first toothed shoe 122, thereby adjusting the magnetic field distribution, reducing the iron loss of the toothed shoe, and improving the motor efficiency.

[0047] It should be noted that the dividing line between the tooth body 121 and the first toothed shoe 122 is the radially inward extension of the side wall of the tooth body 121 for mounting the first toothed shoe 122. The dividing line between the tooth body 121 and the second toothed shoe 123 is the radially inward extension of the side wall of the tooth body 121 for mounting the second toothed shoe 123.

[0048] Optionally, the length of the starting end of the first toothed shoe 122 along the extension direction of the tooth body 121 is c1, and the perpendicular distance from the end face of the first toothed shoe 122 to the center line of the nearest stator slot 130 in the radial direction is w1, satisfying 1.1≤c1 / w1≤4. If the c1 / w1 ratio is too small, it will cause severe magnetic saturation of the first toothed shoe 122, increasing the iron loss of the first toothed shoe 122 and reducing the motor efficiency. If the c1 / w1 ratio is too large, it will cause the slot space of the adjacent stator slot 130 to decrease, increasing the winding loss of the winding 300. This solution limits the c1 / w1 ratio to between 1 and 4, which helps to avoid severe magnetic saturation of the first toothed shoe 122 while increasing the slot space of the adjacent stator slot 130 and reducing the winding loss of the winding 300.

[0049] It should be noted that the center line of the stator slot 130 in the radial direction is denoted as 10, referring to... Figure 4 .

[0050] In one embodiment, the length of the starting end of the second toothed shoe 123 along the extension direction of the tooth body 121 is c2, and the perpendicular distance from the end face of the second toothed shoe 123 to the center line of the nearest stator slot 130 in the radial direction is w2. 1.1 ≤ c2 / w2 ≤ 4. If the c2 / w2 ratio is too small, it will cause severe magnetic saturation of the second toothed shoe 123, increasing the iron loss of the second toothed shoe 123 and reducing motor efficiency. If the c2 / w2 ratio is too large, it will reduce the slot space of adjacent stator slots 130 and increase the winding loss of the winding 300. This solution limits the c2 / w2 ratio to between 1 and 4, which helps to avoid severe magnetic saturation of the second toothed shoe 123 while increasing the slot space of adjacent stator slots 130 and reducing the winding loss of the winding 300.

[0051] It should be noted that c1 refers to the distance between the radially inward extension of the sidewall of the tooth body 121 for mounting the first toothed shoe 122 and the first and last contact points at the starting end of the first toothed shoe 122. c2 refers to the distance between the radially inward extension of the sidewall of the tooth body 121 for mounting the second toothed shoe 123 and the first and last contact points at the starting end of the second toothed shoe 123.

[0052] It should be noted that, taking the center point of the end face of the first toothed shoe 122 as the second starting point, the center point being the intersection of the four diagonals of the end face, a perpendicular line is drawn from the second starting point to the center line of the nearest stator slot 130 in the radial direction. The intersection of this perpendicular line and the center line of the slot is the second ending point. w1 represents the distance from the second starting point to the second ending point. Taking the center point of the end face of the second toothed shoe 123 as the third starting point, the center point being the intersection of the four diagonals of the end face, a perpendicular line is drawn from the third starting point to the center line of the nearest stator slot 130 in the radial direction. The intersection of this perpendicular line and the center line of the slot is the third ending point. w2 represents the distance from the third starting point to the third ending point.

[0053] Optionally, the ratio of w1 to w2 satisfies 1 ≤ w1 / w2 ≤ 1.2. If the w1 / w2 ratio is too small, it will affect the effect of this scheme in adjusting the magnetic field, thereby increasing stator iron loss and reducing motor efficiency. If the w1 / w2 ratio is too large, it will cause the width of the first toothed shoe 122 and the second toothed shoe 123 to be too small, and the winding 300 cannot be fixed in the stator slot 130, increasing the difficulty of processing and manufacturing. This scheme limits the w1 / w2 ratio to between 1 and 2, thereby better adjusting the magnetic field distribution, reducing stator iron loss, and avoiding the situation where the width of the first toothed shoe 122 and the second toothed shoe 123 is too small, thus avoiding the situation where the winding 300 cannot be fixed in the stator slot 130.

[0054] Optionally, in this embodiment, the angle between the first toothed shoe 122 and the tooth body 121 is A, and the angle between the second toothed shoe 123 and the tooth body 121 is B, satisfying 90°≤A≤150° and 90°≤B≤150°. Within this angle range, the distribution of the air gap magnetic field is more uniform. This means that the transition of the magnetic field between the toothed shoe and the tooth body 121 is smoother, reducing magnetic field distortion and non-uniformity. By limiting the angles A and B to between 90° and 150°, iron loss caused by magnetic field pulsation can be reduced. Magnetic field pulsation leads to an increase in hysteresis and eddy current losses in the stator core material. This solution reduces such pulsation by limiting the angles A and B to between 90° and 150°, improving motor efficiency. Moreover, limiting the angles A and B to between 90° and 150° makes the motor's magnetic field more stable, reducing motor vibration and noise caused by magnetic field instability. Furthermore, by limiting the included angles A and B to between 90° and 150°, the area of ​​the stator slot 130 can be utilized more effectively, reducing the difficulty of processing and manufacturing.

[0055] Furthermore, 100°≤A≤150° and 100°≤B≤150° facilitate the concentration and enhancement of the magnetic field, thereby increasing the torque and power density of the motor. This angle also optimizes the magnetic field distribution, reduces magnetic leakage, and improves motor efficiency. Secondly, this angle increases the mechanical strength of the stator teeth 120, making them better able to withstand the electromagnetic forces and mechanical stresses during motor operation. The improved magnetic field distribution and structural design also contribute to better stator heat dissipation, reducing the motor's temperature rise.

[0056] Furthermore, in this embodiment, the stator lamination 100 is a one-piece structure. This one-piece structure simplifies the manufacturing process, reduces the difficulty of manufacturing the stator core, and thus lowers the production cost of the motor. Additionally, making the stator lamination 100 a one-piece structure improves the mechanical properties of the stator core, thereby enhancing the stability of the motor during operation and extending its service life.

[0057] Furthermore, the bottom of the stator slot 130 includes a first segment, a second segment, and a third segment connected in sequence, with the ends of the first and third segments furthest from the second segment respectively adjacent to the two tooth bodies 121.

[0058] It should be noted that the following description of the first, second, and third segments of the stator slot 130 bottom using two-dimensional features such as straight line segments and arc segments is due to the fact that: the stator lamination is sheet-shaped and has a very small thickness; when viewed from the axial direction of the stator lamination, it appears as a two-dimensional object, and the bottom of the stator slot 130 is in the form of a line segment. Therefore, this scheme uses two-dimensional features such as straight line segments and arc segments to describe the first, second, and third segments of the stator slot 130 bottom.

[0059] Optionally, in this embodiment, at least one of the first and third segments is arranged as a straight line, which is beneficial for the winding wiring, thereby improving the slot fill factor and motor efficiency.

[0060] Specifically, in this embodiment, both the first and third segments are straight line segments. In the second embodiment, the first segment is a straight line segment, and the third segment is an arc segment. In the third embodiment, the first segment is an arc segment, and the third segment is a straight line segment.

[0061] It should be noted that when both the first and third segments are set as straight segments, it is more conducive to the wiring of the windings, which helps to improve the stator slot fill factor and thus improve the motor efficiency.

[0062] Optionally, the second segment can be set as an arc segment, a straight segment, or a combination of straight and arc segments.

[0063] Furthermore, in one embodiment, the second segment is an arc segment, which makes the stator yoke thickness distribution more uniform, resulting in a significant improvement in motor mode. In a second embodiment, the second segment is a straight segment, which increases the stator slot fill factor, thereby improving motor efficiency. In a third embodiment, the second segment is a combination of a straight segment and an arc segment.

[0064] In this embodiment, when the second segment is an arc segment, it is configured as an arc segment that arches towards the stator slot. This can be understood as relieving stress on the yoke 110 and providing a certain degree of restraint to the stator winding 300 at the bottom of the stator slot 130, thereby improving motor efficiency while ensuring motor reliability. However, this invention is not limited to this; in other embodiments, the second segment is configured as an arc segment that is concave towards the outside of the stator slot.

[0065] Furthermore, the stator laminations 100 are applied to the stator core, which includes a plurality of stator laminations 100 stacked along the axial direction.

[0066] The stator laminations 100 of the stator core have the same thickness and use the same magnetic material.

[0067] The stator lamination 100 is made of soft magnetic material. Soft magnetic material can achieve a large magnetization intensity with a small external magnetic field. Soft magnetic material has low coercivity and high permeability, which is beneficial to reducing the loss of stator core, that is, reducing the iron loss of the motor, and thus improving the performance of the motor.

[0068] Furthermore, in one embodiment, the stator lamination 100 is made of silicon steel sheet with a thickness of less than 0.35 mm. The silicon steel sheet has low iron loss, high stacking factor, good magnetic induction intensity and good stamping properties, thereby ensuring good working performance of the stator lamination 100. The silicon steel sheet can reduce eddy current loss and hysteresis loss, thereby reducing the heating of the iron core. Moreover, multiple silicon steel sheets are insulated from each other, which can reduce eddy current loss and further reduce heating.

[0069] This utility model also proposes a stator, which includes stator laminations. The specific structure of the stator laminations is as described in the above embodiments. Since this stator 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.

[0070] In one embodiment, the stator further includes an end plate 200. The end plate 200 is provided with a first adapter 210 and a second adapter 220 corresponding to the first toothed shoe 122 and the second toothed shoe 123, respectively. The radial height of the free end of the first adapter 210 is b1, and the radial height of the free end of the second adapter 220 is b2, satisfying 1.1≤b1 / h1≤3 and 0.8≤b2 / h2≤1. Matching the end heights of the first adapter 210 and the second adapter 220 of the end plate 200 with the end heights of the first toothed shoe 122 and the second toothed shoe 123 reduces the difficulty of winding.

[0071] This utility model also proposes an electric motor, which includes a stator. The specific structure of the stator is as described in the above embodiments. Since this electric motor 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.

[0072] 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.

[0073] 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. A stator lamination, characterized in that, include: yoke; and Multiple stator teeth are spaced apart on the inner side of the yoke, and a stator slot is formed between adjacent stator teeth. Each stator tooth includes a tooth body and a first tooth shoe and a second tooth shoe respectively disposed on both sides of the free end of the tooth body. The height of the free end of the first tooth shoe in the radial direction is h1, and the height of the free end of the second tooth shoe in the radial direction is h2, satisfying: 1 S1.

2. The stator lamination as described in claim 1, characterized in that, The length of the starting end of the first toothed shoe along the extension direction of the tooth body is c1, and the vertical distance from the end face of the first toothed shoe to the center line of the nearest stator slot in the radial direction is w1, satisfying 1.1≤c1 / w1≤4.

3. The stator lamination as described in claim 1, characterized in that, The length of the starting end of the second toothed shoe along the extension direction of the tooth body is c2, and the vertical distance from the end face of the second toothed shoe to the center line of the nearest stator slot in the radial direction is w2, 1.1≤c2 / w2≤4.

4. The stator lamination as described in claim 2, characterized in that, The ratio of w1 to w2 satisfies 1 ≤ w1 / w2 ≤ 1.

2.

5. The stator lamination as described in claim 1, characterized in that, The angle between the first toothed shoe and the tooth body is A, and the angle between the second toothed shoe and the tooth body is B, satisfying 90≤A≤150 and 90≤B≤150.

6. The stator lamination as described in claim 1, characterized in that, Includes the stator lamination as described in any one of claims 1 to 9.

7. The stator lamination as described in claim 6, characterized in that, The stator further includes an end plate, and the end plate is provided with a first adapter and a second adapter corresponding to the first toothed shoe and the second toothed shoe, respectively. The radial height of the free end of the first adapter is b1, and the radial height of the free end of the second adapter is b2, satisfying 1.1≤b1 / h1≤3 and 0.8≤b2 / h2≤1.

8. The stator lamination as described in claim 7, characterized in that, Includes the stator as described in claim 10 or 11.

9. The stator lamination as described in claim 1, characterized in that, Including the motor as described in claim 12.

10. A stator, characterized in that, ​ 11. The stator as claimed in claim 10, characterized in that, ​ 12. An electric motor, characterized in that, ​ 13. A compressor, characterized in that, ​

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