Stator, motor and compressor

Abstract

The utility model discloses a stator, motor and compressor relates to motor technical field, the stator includes stator core and skeleton, stator core includes iron core body and at least be provided the punching sheet subassembly of one end portion of iron core body, the punching sheet subassembly includes first punching sheet and second punching sheet, the iron core body comprises a plurality of laminated body punching sheets, the body punching sheets are provided with a plurality of body stator teeth arranged at intervals, and a body stator slot is formed between any two adjacent body stator teeth; the framework comprises an insulating tooth part used for wrapping the first stator teeth and the second stator teeth, the width of the insulating tooth part in the circumferential direction is gradually reduced in the direction from the body stator teeth to the first stator teeth, and W1 < W2 < W3; l1 is smaller than L3. According to the technical scheme provided by the utility model, the strength of the stator core can be improved while the energy efficiency of the motor is improved.

Description

Technical Field

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

[0002] Traditional methods for improving motor energy efficiency primarily focus on optimizing the motor's electromagnetic design. For example, this involves improving winding design, optimizing the stator core structure and dimensions, and optimizing the magnetic circuit design. However, these traditional methods often fail to adequately consider the structural strength of the stator core. In the pursuit of energy efficiency, some optimization measures may negatively impact the strength of the stator core. For instance, using thinner silicon steel sheets to laminate the stator core to reduce iron losses may decrease the overall mechanical strength of the core, thereby affecting the motor's reliability and lifespan. Utility Model Content

[0003] The main purpose of this invention is to propose a stator, motor, and compressor that aims to improve the energy efficiency of the motor while increasing the strength of the stator core.

[0004] To achieve the above objectives, the stator proposed in this utility model includes:

[0005] A stator core, comprising a core body and a lamination assembly disposed at least at one end of the core body, the lamination assembly comprising a first lamination and a second lamination, the first lamination having a plurality of spaced-apart first stator teeth, a first stator slot formed between any two adjacent first stator teeth, the distance from the center point of the bottom of the first stator slot to the outer circumference of the first lamination being L1, and the distance between two adjacent first stator slots being W1; the second lamination and the first lamination are sequentially stacked at the end of the core body, the second lamination having a plurality of spaced-apart second stator teeth, a second stator slot formed between any two adjacent second stator teeth, and the distance between two adjacent second stator slots being W2; the core body comprising a plurality of stacked body laminations, the body lamination having a plurality of spaced-apart body stator teeth, a body stator slot formed between any two adjacent body stator teeth, the distance from the center point of the bottom of the body stator slot to the outer circumference of the body lamination being L3, and the distance between two adjacent body stator slots being W3; and

[0006] The skeleton includes insulating tooth portions for covering the first stator tooth and the second stator tooth. In the direction from the main stator tooth to the first stator tooth, the width of the insulating tooth portions gradually decreases in the circumferential direction, satisfying: W1 < W2 < W3; L1 < L3.

[0007] In one implementation, W3-W2 > L3-L1.

[0008] In one embodiment, the first stator tooth includes a first tooth body and a first tooth shoe disposed at the free end of the first tooth body, the second stator tooth includes a second tooth body and a second tooth shoe disposed at the free end of the second tooth body, and the body stator tooth includes a body tooth body and a body tooth shoe disposed at the free end of the body tooth body, a step is formed between the first tooth shoe and the second tooth shoe, and / or a step is formed between the second tooth shoe and the body tooth shoe.

[0009] In one embodiment, the distance from the center point of the bottom of the second stator slot to the outer circumference of the second lamination is L2, satisfying: L2≤L1<L3.

[0010] In one embodiment, the insulating teeth are arranged in an arc shape on the side facing away from the stator core.

[0011] In one embodiment, at least two steps are formed between the first stator tooth, the second stator tooth, and the main body stator tooth; at least one step is formed between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot; the skeleton is provided with an adapting step at least corresponding to the step at the bottom of the slot; and the insulating tooth is provided with an adapting step at least corresponding to the step between the first stator tooth, the second stator tooth, and the main body stator tooth.

[0012] In one embodiment, the distance from the position of the insulating tooth furthest from the first stator tooth to the first stator tooth is H, where H satisfies 0.8mm < H < 3mm.

[0013] In one embodiment, the minimum wall thickness of the insulating tooth is greater than 0.3 mm.

[0014] In one embodiment, at least one first lamination, one second lamination, and one body lamination are provided, the total stack thickness of the first lamination is K1, the total stack thickness of the second lamination is K2, and the total stack thickness of the body lamination is K3, satisfying: 0.9K1<K2<K3.

[0015] In one embodiment, K1, K2 and K3 satisfy: 0.04≤(K1+K2) / (K1+K2+K3)≤0.3.

[0016] In one embodiment, the ratio of K1 to K2 satisfies: 0.58 < K1 / K2 < 1.11.

[0017] In one embodiment, the ratio of W1 to W3 satisfies: 0.5 < W1 / W3 < 0.8.

[0018] This utility model also proposes an electric motor, including the stator described above.

[0019] This utility model also proposes a compressor, including the aforementioned motor.

[0020] The technical solution of this utility model ensures that the distance W1 between two adjacent first stator slots is less than the distance W2 between two adjacent second stator slots, which is less than the distance W3 between two adjacent body stator slots. This means that at least two steps are formed between the tooth body of the first stator tooth and the tooth body of the body stator tooth, i.e., at least two tooth steps are formed. Furthermore, this solution also ensures that the distance L1 from the center point of the bottom of the first stator slot to the outer circumference of the first lamination is less than the distance L3 from the center point of the bottom of the body stator slot to the outer circumference of the body lamination. Similarly, this solution also ensures that the distance from the bottom of the first stator slot to the outer circumference of the body stator slot is less than the distance L3. At least one step is formed between the slot bottoms, that is, at least one yoke step is formed. This can reduce the size of the stator core yoke cutting, ensure a wider magnetic flux path, reduce the magnetic saturation of the stator core yoke, increase the motor magnetic flux, and improve the motor's energy efficiency. Moreover, the presence of the step increases the contact area between the stator core and other components (such as windings, fixing plates, etc.), thereby increasing the friction and bonding force between them. This makes the stator core more stable during motor operation and less prone to displacement or loosening, thus improving the overall strength and stability of the stator core and making it better able to withstand the mechanical stress and electromagnetic force during motor operation.

[0021] Secondly, because the stator core has steps at its ends, such as tooth steps and yoke steps, the frame can be installed closer to the stator core, resulting in a lower installation height. This reduces the winding height and the height of the motor ends, thereby reducing motor resistance, copper and iron losses, and improving motor efficiency. Furthermore, in this embodiment, the width of the insulating teeth of the frame gradually decreases circumferentially in the direction from the stator teeth to the first stator teeth. This allows for smoother bends at the winding ends during winding, further reducing the end length. This not only lowers the motor end height but also reduces the gap between windings, further increasing slot fill factor and motor efficiency. Attached Figure Description

[0022] 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.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of the stator provided by this utility model;

[0024] Figure 2 for Figure 1 A partial sectional view of the stator is provided.

[0025] Figure 3 for Figure 1 A first-view structural schematic diagram of an embodiment of the stator core provided;

[0026] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 for Figure 3 A partial sectional view of the stator is provided.

[0028] Figure 6 for Figure 1 A second-view structural schematic diagram of an embodiment of the stator core provided;

[0029] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0030] Figure 8 for Figure 1 A schematic diagram of the structure of the stator core of the provided stator in a second embodiment;

[0031] Figure 9 This diagram illustrates the relationship between motor efficiency and (K1+K2) / (K1+K2+K3).

[0032] Figure 10 This is a schematic diagram illustrating the difference in resistance between the present invention and conventional solutions in the prior art.

[0033] Explanation of icon numbers:

[0034] 100. Stator core; 110. Core body; 120. Lamination assembly; 121. First lamination; 121a. First stator tooth; 121a1. First tooth body; 121a2. First tooth shoe; 122. Second lamination; 122a. Second stator tooth; 122a1. Second tooth body; 122a2. Second tooth shoe; 123. Body lamination; 123a. Body stator tooth; 123a1. Body tooth body; 123a2. Body tooth shoe; 124. Tooth step; 125. Yoke step; 126. Shoe step; 130. Frame; 131. Insulating tooth; 132. Curved surface.

[0035] 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

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Traditional methods for improving motor energy efficiency primarily focus on optimizing the motor's electromagnetic design. For example, this involves improving winding design, optimizing the stator core structure and dimensions, and optimizing the magnetic circuit design. However, these traditional methods often fail to adequately consider the structural strength of the stator core. In the pursuit of energy efficiency, some optimization measures may negatively impact the strength of the stator core. For instance, using thinner silicon steel sheets to laminate the stator core to reduce iron losses may decrease the overall mechanical strength of the core, thereby affecting the motor's reliability and lifespan.

[0040] To address the aforementioned problems, this utility model proposes a stator.

[0041] Please see Figures 3 to 8In one embodiment of this utility model, the stator includes a stator core 100 and a frame 130. The stator core 100 includes a core body 110 and a lamination assembly 120 disposed at least at one end of the core body 110. The lamination assembly 120 includes a first lamination 121 and a second lamination 122. The first lamination 121 has a plurality of spaced-apart first stator teeth 121a. A first stator slot is formed between any two adjacent first stator teeth 121a. The distance from the center point of the bottom of the first stator slot to the outer circumference of the first lamination 121 is L1, and the distance between two adjacent first stator slots is W1. The second lamination 122 and the first lamination 121 are stacked sequentially at the end of the core body 110. The second lamination 122 has a plurality of spaced-apart second stator teeth 122a. A second stator slot is formed between the second stator teeth 122a, and the distance between two adjacent second stator slots is W2; the core body includes a plurality of stacked body laminations, each body lamination 123 having a plurality of spaced-apart body stator teeth 123a, and a body stator slot is formed between any two adjacent body stator teeth 123a. The distance from the center point of the bottom of the body stator slot to the outer circumference of the body lamination 123 is L3, and the distance between two adjacent body stator slots is W3; the frame 130 includes an insulating tooth portion 131 for covering the first stator teeth 121a and the second stator teeth 122a. In the direction from the body stator teeth 123a to the first stator teeth 121a, the width of the insulating tooth portion 131 in the circumferential direction gradually decreases, satisfying: W1 < W2 < W3; L1 < L3.

[0042] The technical solution of this utility model makes the distance W1 between two adjacent first stator slots smaller than the distance W2 between two adjacent second stator slots smaller than the distance W3 between two adjacent main body stator slots. It can be understood that the solid between two adjacent first stator slots is the tooth body of the first stator tooth 121a, the solid between two adjacent second stator slots is the tooth body of the second stator tooth 122a, and the solid between two adjacent main body stator slots is the tooth body of the main body stator tooth 123a. Therefore, W1 < W2 < W3, which can also be expressed as the tooth body width of the first stator tooth 121a being smaller than the tooth body width of the second stator tooth 122a being smaller than the tooth body width of the main body stator tooth 123a. This results in at least two steps, or at least two tooth steps 124, being formed between the tooth body of the first stator tooth 121a and the tooth body of the main body stator tooth 123a. Furthermore, this solution also makes the distance from the center point of the bottom of the first stator slot to... The distance L1 between the outer circumference of the first lamination 121 and the outer circumference of the body lamination 123 is less than the distance L3 between the center point of the bottom of the stator slot and the outer circumference of the body lamination 123. Similarly, this solution will also form at least one step between the bottom of the first stator slot and the bottom of the stator slot, that is, at least one yoke step 125. This can reduce the size of the yoke cutting of the stator core 100, ensure a wider magnetic flux path, reduce the magnetic saturation of the yoke of the stator core 100, increase the magnetic flux of the motor, and improve the energy efficiency of the motor. Moreover, the presence of the step increases the contact area between the stator core 100 and other components (such as windings, fixing plates, etc.), thereby increasing the friction and bonding force between them, making the stator core 100 more stable during motor operation and less prone to displacement or loosening. This improves the overall strength and stability of the stator core 100, making it more able to withstand the mechanical stress and electromagnetic force during motor operation.

[0043] Secondly, since the stator core 100 has steps at its ends, such as tooth steps 124 and yoke steps 125, the frame 130 is installed closer to the stator core 100, resulting in a lower installation height. This reduces the winding height and the motor end height, thereby reducing motor resistance, copper and iron losses, and improving motor efficiency. Furthermore, in this embodiment, the width of the insulating teeth 131 of the frame 130 gradually decreases in the circumferential direction from the stator teeth 123a to the first stator teeth 121a. This allows for smoother bends at the ends during winding, further reducing the end length and lowering the motor end height. This, in turn, reduces motor resistance, copper and iron losses, while also reducing the gap between windings, further increasing slot fill factor and improving motor efficiency.

[0044] Reference Figure 10It can be seen that this solution can reduce the motor line resistance by 0.203Ω compared to the traditional solution of the existing technology.

[0045] It should be noted that the stator teeth of the stator core 100 are formed on the first stator tooth 121a, the second stator tooth 122a, and the main body stator tooth 123a. The step between the first stator tooth 121a, the second stator tooth 122a, and the main body stator tooth 123a is referred to as the tooth step 124, and the step between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot is referred to as the yoke step 125.

[0046] The distance L1 is the distance from the first stator slot to the first end point, where the center point of the bottom of the first stator slot is taken as the first starting point. Similarly, the distance L2 is the distance from the second stator slot to the second end point, where the center point of the bottom of the second stator slot is taken as the second starting point. Likewise, the distance L3 is the distance from the third stator slot to the third end point, where the center point of the bottom of the third stator slot is taken as the third starting point.

[0047] Furthermore, the area of ​​the first stator slot is S1, the area of ​​the second stator slot is S2, and the area of ​​the main stator slot is S3, satisfying S1 > S2 > S3.

[0048] In this embodiment, the core body 110 includes a plurality of body laminations 123 stacked along the axial direction. Of course, in other embodiments, the core body 110 may also include a plurality of other laminations stacked along the axial direction. Other laminations may be, for example, but not limited to, a fourth lamination. The tooth width of the fourth stator tooth of the fourth lamination is greater than the tooth width of the body stator tooth 123a of the body lamination 123.

[0049] Optionally, in this embodiment, W3-W2 > L3-L1, that is, in this embodiment, there are two steps in the first stator tooth 121a, the second stator tooth 122a, and the main stator tooth 123a, and at least one step in the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main stator slot. In other words, the steps at the stator teeth at the end of the stator core 100 are more than the steps 125 of the yoke at the end of the stator core 100. Furthermore, the step width of the step between the second stator tooth 122a and the main stator tooth 123a is greater than the step width of the step between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main stator slot. That is, the yoke thickness of the stator core 100 is larger. This can reduce the attenuation of the magnetic flux while increasing the strength of the stator core 100.

[0050] Optionally, the first stator tooth 121a includes a first tooth body 121a1 and a first tooth shoe 121a2 disposed at the free end of the first tooth body 121a1; the second stator tooth 122a includes a second tooth body 122a1 and a second tooth shoe 122a2 disposed at the free end of the second tooth body 122a1; the body stator tooth 123a includes a body tooth body 123a1 and a body tooth shoe 123a2 disposed at the free end of the body tooth body 123a1; a step is formed between the first tooth shoe 121a2 and the second tooth shoe 122a2; and / or, a step is formed between the second tooth shoe 122a2 and the body tooth shoe 123a2. This indicates that at least one step is formed between the first tooth shoe 121a2, the second tooth shoe 122a2, and the body tooth shoe 123a2, i.e., at least one shoe step 126 exists, which ensures electrical insulation safety.

[0051] It should be noted that a step is formed between the first toothed shoe 121a2 and the second toothed shoe 122a2, and / or a step is formed between the second toothed shoe 122a2 and the main toothed shoe 123a2; that is, in the first embodiment, a step is formed between the first toothed shoe 121a2 and the second toothed shoe 122a2; in the second embodiment, a step is formed between the second toothed shoe 122a2 and the main toothed shoe 123a2; and in the third embodiment, a step is formed between the first toothed shoe 121a2 and the second toothed shoe 122a2, and also between the second toothed shoe 122a2 and the main toothed shoe 123a2.

[0052] Secondly, the distance W1 between two adjacent first stator slots also refers to the tooth width of the first tooth body 121a1. The distance W2 between two adjacent second stator slots also refers to the tooth width of the second tooth body 122a1. The distance W3 between two adjacent body stator slots also refers to the tooth width of the body tooth body 123a1. The step between the first tooth shoe 121a2, the second tooth shoe 122a2, and the body tooth shoe 123a2 is denoted as the shoe step 126.

[0053] Furthermore, in this embodiment, the distance from the center point of the bottom of the second stator slot to the outer circumference of the second lamination 122 is L2, satisfying: L2≤L1<L3. This indicates that in the first embodiment, L2<L1<L3, the thickness of the bottom of the first stator slot is greater than the thickness of the bottom of the second stator slot, and the width of the bottom of the main body stator slot is greater than the thickness of the bottom of the first stator slot. A step is also formed between the bottom of the first stator slot and the bottom of the second stator slot. That is, two steps are formed between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot. This allows for more precise adjustment of the area of ​​the stator slots of the stator core 100, further optimizing the distribution of magnetic flux density and magnetic flux, and improving the performance of the motor. Moreover, the first lamination 121 is located at the end of the stator core 100, making the thickness of the bottom of the first stator slot greater than the thickness of the bottom of the second stator slot. This can increase the end strength of the stator core 100 and reduce the probability of deformation of the stator core 100. In the second embodiment, L2 = L1 < L3, meaning that no step is formed between the bottom of the first stator slot and the bottom of the second stator slot. Specifically, only one step is formed between the bottoms of the first stator slot, the second stator slot, and the main stator slot. This step is formed between the second stator tooth 122a and the main stator tooth 123a. This optimizes the area of ​​the stator slots in the stator core 100 to a certain extent, maximizing magnetic flux density and improving motor power and torque speed. Of course, this solution is not limited to this; in other embodiments, L1 < L2 < L3 can also be satisfied.

[0054] Reference Figures 1 to 3 Optionally, the insulating tooth 131 is provided with an arc surface 132 on the side facing away from the first stator tooth 121a. It can be understood that in this embodiment, this further allows the winding to bend more smoothly at the end during winding, thereby allowing for a further reduction in end length. That is, it reduces the height of the motor end, thereby reducing motor resistance, decreasing copper and iron losses, and improving motor efficiency. Simultaneously, it reduces the gap between windings, further increasing slot fill factor and improving motor energy efficiency.

[0055] It should be noted that the arc surface 132 mentioned in this solution should be interpreted in a broad sense. Arc surface 132 can refer to an arc-shaped surface, or a quasi-arc-shaped surface composed of multiple straight planes with small widths; it can also refer to a quasi-arc-shaped surface composed of an arc surface and two inclined planes, wherein the two inclined planes are connected by the arc surface, and the distance between the two inclined planes gradually decreases in the direction close to the arc surface. As long as it can make the bend at the end of the winding smoother, it can be understood as the arc surface 132 mentioned in this solution.

[0056] Furthermore, at least two steps are formed between the first stator tooth 121a, the second stator tooth 122a, and the main body stator tooth 123a, and at least one step is formed between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot. The skeleton 130 has at least one matching step corresponding to the step at the bottom of the slot, and the insulating tooth 131 has at least one matching step corresponding to the step between the first stator tooth 121a, the second stator tooth 122a, and the main body stator tooth 123a. It can be explained that the skeleton 130 has at least one matching step corresponding to the yoke step 125 between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot, and the insulating tooth 131 has at least one matching step corresponding to the tooth step 124 between the first stator tooth 121a, the second stator tooth 122a, and the main body stator tooth 123a. Alternatively, an adapter step can be set for each tooth step 124 and for each yoke step 125. This will make the fit between the frame 130 and the stator core 100 tighter, thus making the installation of the frame 130 more stable.

[0057] Furthermore, the distance H from the position of the insulating tooth 131 furthest from the first stator tooth 121a is 0.8mm < H < 3mm. If the distance H from the position of the insulating tooth 131 furthest from the first stator tooth 121a is less than 0.8mm, then the distance H is too small, which will lead to a decrease in electrical insulation performance and a decrease in the strength of the insulating frame 130. If the distance H from the position of the first stator tooth 121a to the first stator tooth 121a is greater than 3mm, then the distance H from the position of the insulating tooth 131 furthest from the first stator tooth 121a to the first stator tooth 121a is too large, which will increase the length of the winding end. In this solution, the distance H from the position of the insulating tooth 131 furthest from the first stator tooth 121a to the first stator tooth 121a is controlled between 0.8mm and 3mm. This can improve the electrical insulation performance, ensure the strength of the insulating frame 130, and reduce the length of the winding end, so that the overall effect of the stator core 110 is relatively better.

[0058] It should be noted that the point on the insulating tooth 131 furthest from the first stator tooth 121a is taken as the fourth starting point. A perpendicular line is drawn from the fourth starting point to the tooth surface of the first stator tooth 121a. The intersection of this perpendicular line and the tooth surface of the first stator tooth 121a is taken as the fourth ending point. H represents the distance from the fourth starting point to the fourth ending point.

[0059] Optionally, in this embodiment, the minimum wall thickness of the insulating tooth 131 is greater than 0.3 mm. This ensures the wall thickness of the insulating tooth 131, thereby helping to guarantee its strength. In particular, the wall thickness of the arc-shaped surface of the insulating tooth 131 facing away from the first stator tooth 121a should be greater than 0.3 mm. If the minimum wall thickness of the insulating tooth 131 is less than 0.3 mm, the wall thickness will be too thin, resulting in poor strength and hindering production.

[0060] Furthermore, at least one of the first lamination 121, the second lamination 122, and the body lamination 123 is provided. The total stack thickness of the first lamination 121 is K1, the total stack thickness of the second lamination 122 is K2, and the total stack thickness of the body lamination 123 is K3, satisfying: 0.9K1<K2<K3. It can be understood that the body lamination 123 is the most numerous, so as to ensure that the iron loss and winding loss of the motor are relatively low.

[0061] It should be noted that K1 represents the total stacking height of the first lamination 121 in the axial direction. Specifically, when there are multiple first laminations 121 stacked together, K1 represents the straight-line distance between the centers of the two opposite end faces of the two end laminations 121 located at the ends of the multiple first laminations 121. When there is only one first lamination 121, K1 represents the straight-line distance between the centers of the two end faces of the first lamination 121 distributed along the axial direction. Similarly, K2 represents the total stacking height of the second lamination 122 in the axial direction. Specifically, when there are multiple second laminations 122 stacked together, K2 represents the straight-line distance between the centers of the two opposite end faces of the two end laminations 122 located at the ends of the multiple second laminations 122. When there is only one second lamination 122, K2 represents the straight-line distance between the centers of the two end faces of the second lamination 122 distributed along the axial direction. K3 represents the total stacking height of the body stamping 123 in the axial direction. Specifically, when there are multiple body stampings 123, and these multiple body stampings 123 are stacked together, K3 represents the straight-line distance between the centers of the two opposite end faces of the two end body stampings 123 located at the ends of the multiple body stampings 123. When there is only one body stamping 123, K3 represents the straight-line distance between the centers of the two end faces of the body stamping 123 distributed along the axial direction.

[0062] In this embodiment, the first stamping 121, the second stamping 122, and the body stamping 123 are each provided in multiples.

[0063] Furthermore, K1, K2, and K3 satisfy: 0.04 ≤ (K1+K2) / (K1+K2+K3) ≤ 0.3. If the sum of the first lamination 121 and the second lamination 122 accounts for too high a proportion of the overall structure, it will increase motor losses because the width of the stator teeth decreases overall, making it more difficult for magnetic flux to enter from the stator teeth, resulting in a decrease in magnetic flux. At the same time, tooth saturation increases, and iron losses are more likely to increase. If the sum of the first lamination 121 and the second lamination 122 accounts for too small a proportion of the overall structure, the side of the insulating tooth 131 facing away from the first stator tooth 121a cannot form an arc structure, failing to achieve the effect of reducing the gap between windings and improving the slot fill factor of this utility model. This solution limits the proportion of the first lamination 121 and the second lamination 122 to between 0.04 and 0.3, which can reduce motor losses while reducing the gap between windings and improving the slot fill factor.

[0064] Reference Figure 9 It can be seen that when the ratio of (K1+K2) / (K1+K2+K3) is less than 14%, the motor efficiency gradually increases as the ratio of (K1+K2) / (K1+K2+K3) increases. When the ratio of (K1+K2) / (K1+K2+K3) is greater than 14%, the motor efficiency gradually decreases as the ratio of (K1+K2) / (K1+K2+K3) increases. Moreover, when the ratio of (K1+K2) / (K1+K2+K3) is between 4% and 30%, the motor efficiency reaches over 94.2%. Therefore, limiting (K1+K2) / (K1+K2+K3) to between 4% and 30% is beneficial to improving motor efficiency.

[0065] Furthermore, the ratio of K1 to K2 satisfies: 0.58 < K1 / K2 < 1.11; this scheme limits the stacking thickness ratio of the first lamination 121 and the second lamination 122 to between 0.5 and 1.11, which is beneficial to maintaining good performance.

[0066] Furthermore, the ratio of W1 to W3 satisfies: 0.5 < W1 / W3 < 0.8, which ensures better overall performance of the motor.

[0067] 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.

[0068] 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.

[0069] 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, characterized in that, include: A stator core, comprising a core body and a lamination assembly disposed at least at one end of the core body, the lamination assembly comprising a first lamination and a second lamination, the first lamination having a plurality of spaced-apart first stator teeth, a first stator slot formed between any two adjacent first stator teeth, the distance from the center point of the bottom of the first stator slot to the outer circumference of the first lamination being L1, and the distance between two adjacent first stator slots being W1; the second lamination and the first lamination are sequentially stacked at the end of the core body, the second lamination having a plurality of spaced-apart second stator teeth, a second stator slot formed between any two adjacent second stator teeth, and the distance between two adjacent second stator slots being W2; the core body comprising a plurality of stacked body laminations, the body lamination having a plurality of spaced-apart body stator teeth, a body stator slot formed between any two adjacent body stator teeth, the distance from the center point of the bottom of the body stator slot to the outer circumference of the body lamination being L3, and the distance between two adjacent body stator slots being W3; and The skeleton includes insulating tooth portions for covering the first stator tooth and the second stator tooth. In the direction from the main stator tooth to the first stator tooth, the width of the insulating tooth portions gradually decreases in the circumferential direction, satisfying: W1 < W2 < W3; L1 < L3.

2. The stator as described in claim 1, characterized in that, W3-W2 > L3-L1.

3. The stator as described in claim 2, characterized in that, The first stator tooth includes a first tooth body and a first tooth shoe located at the free end of the first tooth body; the second stator tooth includes a second tooth body and a second tooth shoe located at the free end of the second tooth body; the body stator tooth includes a body tooth body and a body tooth shoe located at the free end of the body tooth body; a step is formed between the first tooth shoe and the second tooth shoe; and / or a step is formed between the second tooth shoe and the body tooth shoe.

4. The stator as described in claim 2, characterized in that, The distance from the center point of the bottom of the second stator slot to the outer circumference of the second lamination is L2, which satisfies: L2≤L1<L3.

5. The stator as described in claim 1, characterized in that, The insulating teeth are arranged in an arc shape on the side facing away from the stator core.

6. The stator as described in claim 5, characterized in that, At least two steps are formed between the first stator tooth, the second stator tooth, and the main body stator tooth. At least one step is formed between the bottom of the first stator slot, the bottom of the second stator slot, and the bottom of the main body stator slot. The skeleton has at least one matching step corresponding to the step at the bottom of the slot. The insulating tooth has at least one matching step corresponding to the step between the first stator tooth, the second stator tooth, and the main body stator tooth.

7. The stator as described in claim 5, characterized in that, The distance from the position of the insulating tooth furthest from the first stator tooth to the first stator tooth is H, where H satisfies 0.8mm < H < 3mm.

8. The stator as described in claim 5, characterized in that, The minimum wall thickness of the insulating teeth is greater than 0.3 mm.

9. The stator as described in claim 1, characterized in that, The first lamination, the second lamination, and the body lamination are each provided at least once. The total stack thickness of the first lamination is K1, the total stack thickness of the second lamination is K2, and the total stack thickness of the body lamination is K3, satisfying: 0.9K1<K2<K3.

10. The stator as described in claim 9, characterized in that, K1, K2 and K3 satisfy: 0.04≤(K1+K2) / (K1+K2+K3)≤0.

3.

11. The stator as described in claim 9, characterized in that, The ratio of K1 to K2 satisfies: 0.58 < K1 / K2 < 1.

11.

12. The stator according to any one of claims 1 to 11, characterized in that, The ratio of W1 to W3 satisfies: 0.5 < W1 / W3 < 0.

8.

13. An electric motor, characterized in that, Includes the stator as described in any one of claims 1 to 12.

14. A compressor, characterized in that, Including the motor as described in claim 13.

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