Stator, motor, compressor and refrigeration appliance

Abstract

The application discloses a kind of stator, motor, compressor and refrigeration equipment, it is related to compressor technical field, wherein, stator is used for motor, stator includes stator core, insulating end plate and rib, stator core includes stator yoke and stator tooth, multiple are arranged with interval along the inside of stator yoke, stator tooth includes tooth body part and tooth shoe part;Insulating end plate is located at the end of stator core, insulating end plate includes outer insulating plate, inner insulating plate and connecting plate connected between outer insulating plate and inner insulating plate, outer insulating plate is located at stator yoke, connecting plate is located at tooth body part, inner insulating plate is located at tooth shoe part, winding is wound on tooth body part and connecting plate;Rib is located at the side of connecting plate away from stator core, rib is also connected with the inner wall surface of outer insulating plate, to limit outermost winding close to the inner wall surface of outer insulating plate;The technical scheme provided by the application can improve the voltage resistance between winding enameled wire.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and particularly to a stator, motor, compressor, and refrigeration equipment. Background Technology

[0002] In traditional winding manufacturing, enameled wire is tightly wound layer by layer onto a bobbin. However, the outermost layer of enameled wire experiences the greatest compressive stress during winding, which can easily lead to scratches or damage to the insulation layer. This damage reduces the insulation performance between the enameled wires, causing electrical faults such as inter-turn short circuits, affecting the winding's withstand voltage and service life, and increasing production costs and scrap rates. Summary of the Invention

[0003] The main objective of this invention is to provide a stator, motor, compressor, and refrigeration equipment designed to improve the withstand voltage between the enameled wires of the windings.

[0004] To achieve the above objectives, the present invention provides a stator for use in an electric motor, the stator comprising:

[0005] A stator core includes a stator yoke and stator teeth. Multiple stator teeth are spaced apart along the inner side of the stator yoke. Each stator tooth includes a tooth body and a tooth shoe.

[0006] An insulating end plate is provided at the end of the stator core. The insulating end plate includes an outer insulating plate, an inner insulating plate, and a connecting plate connecting the outer insulating plate and the inner insulating plate. The outer insulating plate is provided on the stator yoke, the connecting plate is provided on the tooth body, and the inner insulating plate is provided on the tooth shoe. Windings are wound on the tooth body and the connecting plate.

[0007] A stiffener is provided on the side of the connecting plate away from the stator core. The stiffener is also connected to the inner wall of the outer insulation plate to limit the outermost winding from approaching the inner wall of the outer insulation plate.

[0008] In one embodiment, the number of stator slots of the motor is Q, the number of phases of the motor is m, the number of ribs is k1, m≤k1≤Q*n, and 1≤n≤3.

[0009] In one embodiment, the connecting plate is provided with a plurality of ribs, and each rib is symmetrically arranged about the geometric center line of the connecting plate.

[0010] In one embodiment, the outer radius of the outer insulating plate is d1, the inner radius of the outer insulating plate is d2, the outer radius of the inner insulating plate is d3, the inner radius of the inner insulating plate is d4, and 0.1≤(d1-d2) / (d3-d4)≤2.

[0011] In one embodiment, the shortest distance from the rib to the center of the stator is d5, where 0.1 ≤ (d1-d2) / (d2-d5) ≤ 2.

[0012] In one embodiment, the height of the outer insulating plate is h1, the height of the inner insulating plate is h2, the height of the rib is h3, and 0.1≤(h1-h3) / (h2-h3)≤2.

[0013] In one embodiment, the number of stator slots of the motor is Q, and the width of the connecting plate is w1, 0.5 ≤ ≤1.5.

[0014] In one embodiment, the width of the rib is w2, 0. <w2 / w1≤1。

[0015] In one embodiment, the reinforcing rib and the insulating end plate are integrally injection molded.

[0016] In one embodiment, the rib is configured as any one of a cylinder, cuboid, and polyhedron.

[0017] The present invention also proposes an electric motor comprising a stator as described above.

[0018] The present invention also proposes a compressor comprising the motor described above.

[0019] The present invention also proposes a refrigeration device, which includes a compressor as described above.

[0020] In the technical solution of the present invention, the stator includes a stator core, an insulating end plate and stiffeners. The insulating end plate is located at the end of the stator core, and windings are wound on the insulating end plate and the stator core to effectively isolate the windings from the end of the stator core and ensure the overall insulation performance.

[0021] Specifically, the insulating end plate includes an outer insulating plate, a connecting plate, and an inner insulating plate. The connecting plate is connected between the outer and inner insulating plates and is wound together with the stator teeth of the stator core. The connecting plate has a rib on the side away from the stator core. One end of the rib is connected to the inner wall of the outer insulating plate, and the other end is used to contact the outermost winding. By setting the rib, the outermost winding can be limited from approaching the inner wall of the outer insulating plate, reducing the contact area between the outermost winding and the inner wall of the outer insulating plate. This minimizes the compression of the outermost enameled wire during the winding process, reduces the possibility of damage to the enameled wire, and improves the withstand voltage between the enameled wires, thereby increasing the efficiency of the motor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. 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 This is a top view of an embodiment of the insulating end plate provided by the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram showing the height dimensions of the inner and outer insulation boards;

[0025] Figure 3 for Figure 1 Schematic diagram of the height dimensions of the inner insulating plate;

[0026] Figure 4 for Figure 1 Schematic diagram of the width dimensions of the connecting plate and the reinforcing bars;

[0027] Figure 5 This is a schematic diagram of the structure of an embodiment of the compressor provided by the present invention;

[0028] Figure 6 This is a schematic diagram illustrating the pressure resistance and motor efficiency of the present invention.

[0029] Explanation of icon numbers:

[0030] 1. Compressor; 100. Motor; 10. Stator; 11. Stator core; 12. Insulating end plate; 121. Outer insulating plate; 122. Inner insulating plate; 123. Connecting plate; 13. Rib;

[0031] 20. Rotor; 30. Pump body components; 40. Casing.

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention 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.

[0035] Furthermore, if the embodiments of this invention 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. Thus, 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 invention.

[0036] In traditional winding manufacturing, enameled wire is tightly wound layer by layer onto a bobbin. However, the outermost layer of enameled wire experiences the greatest compressive stress during winding, which can easily lead to scratches or damage to the insulation layer. This damage reduces the insulation performance between the enameled wires, causing electrical faults such as inter-turn short circuits, affecting the winding's withstand voltage and service life, and increasing production costs and scrap rates.

[0037] To solve this technical problem, the present invention proposes a stator 10.

[0038] Please see Figures 1 to 4In one embodiment of the present invention, the stator 10 includes a stator core 11, an insulating end plate 12, and reinforcing bars 13. The stator core 11 includes a stator yoke and stator teeth. Multiple stator teeth are spaced apart along the inner side of the stator yoke, and each stator tooth includes a tooth body and a tooth shoe portion. The insulating end plate 12 is disposed at the end of the stator core 11. The insulating end plate 12 includes an outer insulating plate 121, an inner insulating plate 122, and a connecting plate 123 connecting the outer insulating plate 121 and the inner insulating plate 122. An insulating plate 121 is disposed on the stator yoke, a connecting plate 123 is disposed on the tooth body, and an inner insulating plate 122 is disposed on the tooth shoe. Windings are wound on the tooth body and the connecting plate 123. A rib 13 is disposed on the side of the connecting plate 123 away from the stator core 11. The rib 13 is also connected to the inner wall surface of the outer insulating plate 121 to limit the outermost winding from approaching the inner wall surface of the outer insulating plate 121. This reduces damage to the outermost winding and improves the withstand voltage and reliability of the winding.

[0039] In the technical solution of the present invention, the stator 10 includes a stator core 11, an insulating end plate 12 and a rib 13. The insulating end plate 12 is disposed at the end of the stator core 11, and windings are wound on the insulating end plate 12 and the stator core 11 to effectively isolate the windings and the end of the stator core 11 and ensure the overall insulation performance.

[0040] Specifically, the insulating end plate 12 includes an outer insulating plate 121, a connecting plate 123, and an inner insulating plate 122. The connecting plate 123 is connected between the outer insulating plate 121 and the inner insulating plate 122, and is wound together with the stator teeth of the stator core 11. The connecting plate 123 has a rib 13 on the side away from the stator core 11. One end of the rib 13 is connected to the inner wall surface of the outer insulating plate 121, and the other end is used to contact the outermost winding enameled wire. By setting the rib 13, the outermost winding can be restricted from approaching the inner wall surface of the outer insulating plate 121, reducing the contact area between the outermost winding and the inner wall surface of the outer insulating plate 121. This minimizes the compression of the outermost enameled wire by the winding enameled wire during the winding process, reduces the possibility of damage to the winding enameled wire, and thus improves the withstand voltage between the winding enameled wires and improves the efficiency of the motor 100.

[0041] It should be noted that there are two insulating end plates 12, respectively located at both ends of the stator core 11, which can fix the winding ends and prevent them from colliding and wearing each other due to vibration. The inner insulating plate 122 and the connecting plate 123 can form connecting ribs, which are adapted to the stator teeth. Multiple connecting ribs are spaced along the inner wall of the outer insulating plate 121, and an installation groove is formed between two adjacent connecting ribs and the outer insulating plate 121. This installation groove is adapted to the winding slots of the stator core 11, facilitating winding on the stator core 11 and the insulating end plates 12. The limiting protrusions on the inner insulating plate 122 that protrude from the connecting plate 123 can, to a certain extent, restrict the movement of the insulating paper within the winding slots, thereby ensuring stable installation of the windings within the winding slots.

[0042] Furthermore, in traditional winding manufacturing processes, enameled wire is tightly wound layer by layer onto the stator core 11 and the insulating end plate 12. During this process, the outermost layer of enameled wire experiences the greatest compressive stress. Therefore, by setting ribs 13 between the outermost layer of enameled wire and the inner wall of the outer insulating plate 121, the stress distribution can be altered, dispersing the stress originally concentrated on the outermost layer of enameled wire to a wider area. Thus, by rationally designing the shape and position of the ribs 13, the direct compression on the outermost layer of enameled wire can be effectively reduced, thereby reducing the risk of scratches and wear, improving the insulation performance between the winding enameled wires, and consequently improving the withstand voltage of the winding, enhancing the safety of the motor 100, and also helping to reduce maintenance costs and production scrap rates.

[0043] Optionally, in an embodiment of the present invention, the reinforcing rib 13 and the insulating end plate 12 are integrally injection molded. Thus, by integrally injection molding the reinforcing rib 13 and the insulating end plate 12, production and assembly processes are reduced, saving production time and costs. Furthermore, precise mold design and injection molding process control ensure product dimensional consistency and accuracy, thereby improving product quality. Simultaneously, the connection strength and structural stability of the insulating end plate 12 and the reinforcing rib 13 are enhanced, ensuring reliable constraint of the winding by the reinforcing rib 13.

[0044] Optionally, in embodiments of the present invention, the rib 13 is configured as any one of a cylinder, a cuboid, and a polyhedron. When the rib 13 is a cylinder, the curved surface design of the cylinder can evenly distribute stress on the surface of the winding enameled wire, reducing localized high-stress areas. Simultaneously, compared to sharp edges, it reduces the risk of the rib 13 scratching the winding enameled wire when in contact with it. When the rib 13 is a cuboid, the structure is stable, and the inner space of the outer insulation plate 121 can be utilized effectively, allowing it to fit more tightly against the winding surface, resisting pressure and protecting the enameled wire from damage. When the rib 13 is a polyhedron, during winding, each face of the polyhedron can disperse stress in different directions, reducing localized stress concentration and thus reducing the risk of the rib 13 scratching the winding enameled wire when in contact with it. Of course, other shapes that can reduce the risk of the rib 13 scratching the winding enameled wire when in contact with it are also applicable to this solution.

[0045] Optionally, in an embodiment of the present invention, the number of stator slots of the motor 100 is Q, the number of phases of the motor 100 is m, and the number of ribs 13 is k1, where m≤k1≤Q*n and 1≤n≤3. Thus, based on the setting of the number of phases and stator slots of the motor 100, the number of ribs 13 is reasonably designed to ensure that the outermost layer of each phase winding is stopped by ribs 13, effectively reducing the direct compression of the outermost enameled wire, thereby reducing the risk of scratches and wear, improving the insulation performance between the enameled wires of the windings, and thus improving the withstand voltage of the windings and improving the safety of the motor 100 in use.

[0046] Furthermore, the number of ribs 13 on a connecting plate 123 can be set according to requirements, specifically 0, 1, 2, or 3. Understandably, when k1=m, while ensuring that the outermost layer of each phase winding is stopped by ribs 13, other connecting plates 123 may not have ribs 13. When k1=Q*n and n=1, each connecting plate 123 has one rib 13, which helps enhance the overall structural stability of the insulating end plate 12. When k1=Q*n and n=2 or 3, each connecting plate 123 has 2 or 3 ribs 13 spaced apart, which helps increase the connection area between the outermost winding enameled wire and the ribs 13, further minimizing the compression of the outermost enameled wire during winding, reducing the possibility of damage to the winding enameled wire, thereby improving the withstand voltage between the winding enameled wires and increasing the efficiency of the motor 100.

[0047] Specifically, in an embodiment of the present invention, the connecting plate 123 is provided with a plurality of ribs 13, and each rib 13 is symmetrically arranged about the geometric center line of the connecting plate 123. In this way, while minimizing the compression of the outermost enameled wire by the winding wire during the winding process, the connection stability between the connecting plate 123 and the outer insulation plate 121 is ensured, thereby improving the overall structural stability of the insulation end plate 12.

[0048] When the number of ribs 13 is odd, the middle rib 13 is located on the geometric center line of the connecting plate 123, and the remaining ribs 13 are symmetrically distributed in pairs with the center line as the axis of symmetry. When the number of ribs 13 is even, all ribs 13 are symmetrically distributed in pairs with the geometric center line as the axis of symmetry, and no rib 13 is located on the center line.

[0049] Please see Figure 1 In an embodiment of the present invention, the outer radius of the outer insulating plate 121 is d1, the inner radius of the outer insulating plate 121 is d2, the outer radius of the inner insulating plate 122 is d3, the inner radius of the inner insulating plate 122 is d4, and 0.1≤(d1-d2) / (d3-d4)≤2.

[0050] Understandably, d1 is the distance between the outer wall surface of the outer insulating plate 121 and the geometric center of the insulating end plate 12, d2 is the distance between the inner wall surface of the outer insulating plate 121 and the geometric center of the insulating end plate 12, d1-d2 refers to the radial thickness of the outer insulating plate 121, i.e., the wall thickness of the outer insulating plate 121, d3 is the distance between the outer wall surface of the inner insulating plate 122 and the geometric center of the insulating end plate 12, d4 is the distance between the inner wall surface of the inner insulating plate 122 and the geometric center of the insulating end plate 12, d3-d4 refers to the radial thickness of the inner insulating plate 122, i.e., the wall thickness of the inner insulating plate 122. By limiting the wall thickness ratio (d1-d2) / (d3-d4) of the outer insulating plate 121 and the inner insulating plate 122, the slot area and its distribution of the stator slot can be indirectly controlled.

[0051] When (d1-d2) / (d3-d4) is greater than 2, the outer insulation plate 121 is too thick, the stator yoke is largely encroached upon, the slot area of ​​the stator slot is significantly reduced, winding filling is restricted, resulting in low slot fill factor, increased resistance, and increased losses; the inner insulation plate 122 is too thin, making it prone to cracking. When (d1-d2) / (d3-d4) is less than 0.1, the inner insulation plate 122 is too thick, the tooth body and tooth shoe are largely encroached upon, the slot area of ​​the stator slot is significantly reduced, the slot opening is narrow, winding is difficult, resulting in low slot fill factor and tooth body magnetic... Narrowing the path increases losses; the outer insulation plate 121 is too thin and is prone to deformation, and the winding ends are easily impacted by centrifugal force; therefore, the wall thickness ratio (d1-d2) / (d3-d4) is limited to between 0.1 and 2, the outer insulation plate 121 and the inner insulation plate 122 are of equal thickness, the stator yoke and stator teeth have sufficient space, the occupancy of the slot area is reduced, the slot area can be maximized, the winding is convenient, the energy consumption is low, and it helps to improve the overall structural stability of the insulation end plate 12, thereby improving the efficiency and reliability of the motor 100.

[0052] The specific values ​​of the wall thickness ratio (d1-d2) / (d3-d4) include, but are not limited to, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.

[0053] Please see Figure 1 In an embodiment of the present invention, the shortest distance from the rib 13 to the center of the stator 10 is d5, and 0.1≤(d1-d2) / (d2-d5)≤2.

[0054] Understandably, d1-d2 refers to the radial thickness of the outer insulating plate 121, i.e., the wall thickness of the outer insulating plate 121, d5 is the distance between the end of the rib 13 away from the outer insulating plate 121 and the geometric center of the insulating end plate 12, and d2-d5 refers to the radial thickness of the rib 13, i.e., the protrusion depth of the rib 13. By limiting the wall thickness ratio (d1-d2) / (d2-d5) of the outer insulating plate 121 and the rib 13, the slot area and its distribution of the stator slot can be indirectly controlled.

[0055] When (d1-d2) / (d2-d5) is greater than 2, the wall thickness of the outer insulation plate 121 is too thick, the stator yoke is largely encroached upon, the slot area of ​​the stator slots is significantly reduced, the winding filling is restricted, resulting in low slot fill factor, increased resistance, and increased losses; the protrusion depth of the rib 13 is too shallow, the effect of reducing the compression of the outermost layer of the winding enameled wire is poor, and the outermost layer of the winding enameled wire is prone to scratches and wear; when (d1-d2) / (d2-d5) is less than 0.1, the wall thickness of the outer insulation plate 121 is too thin, it is prone to deformation, and it is also easy for the rib 13 to protrude from the outer insulation plate. A break occurred at the connection of the edging plate 121; the protrusion depth of the rib 13 was too deep, occupying the winding space of the enameled wire, and the effective stroke of the winding nozzle entering the slot radially was "cut off in advance". Therefore, the winding nozzle could only be raised or changed at an earlier time to avoid interference with the rib 13, which forced a reduction in the number of turns that could be arranged in the same layer; while maintaining the specified number of turns, the number of winding layers was large, but the enameled wires of the inner and outer winding layers squeezed each other, which easily increased the risk of wear and reduced the insulation performance between the enameled wires of the windings. At the same time, it was difficult to insert the wire, the slot fill factor was falsely high, and the actual heat dissipation path was blocked.

[0056] Therefore, by limiting the wall thickness ratio (d1-d2) / (d2-d5) of the outer insulation plate 121 and the rib 13 to between 0.1 and 2, the wall thickness of the outer insulation plate 121 and the protrusion depth of the rib 13 are balanced, reducing the occupation of the slot area and maximizing the slot area, resulting in low energy consumption. At the same time, it facilitates wire winding, ensures sufficient radial travel of the winding nozzle, does not increase the number of layers, and ensures neat arrangement of the enameled wire, effectively avoiding extrusion and enamel film damage, improving the insulation performance between the enameled wires of the winding, thereby improving the withstand voltage of the winding, and also helps to improve the overall structural stability of the insulation end plate 12, thereby improving the efficiency and reliability of the motor 100.

[0057] The specific values ​​of the wall thickness ratio (d1-d2) / (d2-d5) of the outer insulation plate 121 and the reinforcing rib 13 include, but are not limited to, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.

[0058] Please see Figure 2 and Figure 3 In an embodiment of the present invention, the height of the outer insulating plate 121 is h1, the height of the inner insulating plate 122 is h2, the height of the rib 13 is h3, and 0.1≤(h1-h3) / (h2-h3)≤2.

[0059] Understandably, h1-h3 refer to the remaining height of the outer insulation plate 121 excluding the stiffener 13, and h2-h3 refer to the remaining height of the inner insulation plate 122 excluding the stiffener 13. By limiting the ratio of the remaining height of the outer insulation plate 121 and the inner insulation plate 122 (h1-h3) / (h2-h3) to between 0.1 and 2, the heights of the outer insulation plate 121, the inner insulation plate 122, and the stiffener 13 are matched. That is, the height of the stiffener 13 is higher than the stacking height of the winding enameled wires and not lower than the height of the outer insulation plate 121. This ensures that the winding enameled wires are all stopped by the stiffener 13, and there is no possibility of other layers of winding enameled wires contacting and pressing against the outer insulation plate 121. This reduces the risk of scratches and wear on the windings, thereby improving the insulation performance between the winding enameled wires and thus improving the withstand voltage of the windings.

[0060] The specific values ​​of the remaining height ratio (h1-h3) / (h2-h3) of the outer insulating plate 121 and the inner insulating plate 122 include, but are not limited to, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.

[0061] Please see Figure 4 In an embodiment of the present invention, the number of stator slots of the motor 100 is Q, and the width of the connecting plate 123 is w1, 0.5≤ ≤1.5.

[0062] Understandably, since the number of connecting plates 123 corresponds to the number of stator slots, i.e., the two are equal, w1*Q is the total arc length occupied by all connecting plates 123 in the circumferential direction, and π(d2+d3) is the circumference of the insulating end plate 12 at the "average radius of the slot" (approximately the average diameter of the inner and outer circles).

[0063] K= When K is greater than 1.5, the connecting plate 123 is too wide, and the slot is largely occupied by the connecting plate 123, making it difficult for the winding nozzle to enter, resulting in difficulty in winding and forcing an increase in the number of layers. At the same time, the enameled wires closest to the two sides of the connecting plate 123 will be forced to move towards the center of the slot or the outer diameter due to insufficient space, which will easily cause the enameled wires of the winding to squeeze each other, resulting in the risk of scratches and wear, and reducing the insulation performance between the enameled wires of the winding. When K is less than 0.5, the connecting plate 123 is too narrow, resulting in poor rigidity and easy deformation, which cannot fully isolate the winding ends, thus affecting the insulation effect.

[0064] Therefore, by limiting K to be between 0.5 and 1.5, the width of the connecting plate 123 is moderate, reducing the occupation of the slot area, maximizing the slot area, and having low energy consumption. At the same time, it is convenient for wire insertion, ensuring that the wire winding nozzle has sufficient radial travel, without increasing the number of layers, the enameled wires are arranged neatly, effectively avoiding extrusion and damage to the paint film, improving the insulation performance between the enameled wires of the winding, and further enhancing the voltage withstand capacity of the winding. Moreover, it helps to improve the overall structural stability of the insulation end plate 12, thereby improving the efficiency and reliability of the motor 100.

[0065] Furthermore, in the embodiment of the present invention, the width of the rib 13 is w2, and 0 < w2 / w1 ≤ 1. This width is the circumferential dimension of the rib 13 along the circumferential direction. When the width of the rib 13 is too wide, the enameled wires of the winding will yield towards the only remaining space, that is, squeeze towards the tooth root or the rotor direction, easily causing the innermost enameled wires of the winding to be close to the tooth root, increasing the local pressure, and raising the risk of being scratched and worn. It is also easy for the whole winding to bulge towards the air gap side, reducing the effective air gap, and even rubbing against the rotor. When the width of the rib 13 is too narrow, the effect of reducing the extrusion on the outermost layer of the enameled wires of the winding is poor, and the outermost enameled wires of the winding are prone to the risk of being scratched and worn.

[0066] Therefore, by reasonably controlling the width ratio of the rib 13 to the connecting plate 123, reducing the occupation of the slot area, the slot area can be maximized, with low energy consumption. It can also prevent the enameled wires of the winding from being squeezed towards the rotor or bulging outwards to affect the air gap, ensuring the overall reliability of the motor 100. At the same time, it is convenient for wire insertion, ensuring that the wire winding nozzle has sufficient space for movement, without increasing the number of layers, the enameled wires are arranged neatly, effectively avoiding extrusion and damage to the paint film, improving the insulation performance between the enameled wires of the winding, and further enhancing the voltage withstand capacity of the winding, improving the efficiency of the motor 100.

[0067] Generally speaking, as Figure 6 shown, by designing the structural dimensions of the insulation end plate 12, that is, its protruding depth and width, the extrusion of the enameled wires of the winding on the outermost enameled wires during the winding process can be minimized, reducing the possibility of damage to the enameled wires of the winding, thereby improving the voltage withstand capacity between the enameled wires of the winding and enhancing the efficiency of the motor 100.

[0068] The present invention also proposes a motor 100, which includes a stator 10. The specific structure of the stator 10 refers to the above-mentioned embodiment. Since this motor 100 adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0069] The present invention also proposes a compressor 1, which includes a motor 100. The specific structure of the motor 100 is as described in the above embodiments. Since this compressor 1 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 elaborated here. Figure 5 As shown, the compressor 1 includes a housing 40, a stator 10, a rotor 20 disposed inside the stator 10, and a pump body component 30 connected to the rotor 20.

[0070] The present invention also proposes a refrigeration device, which includes a compressor 1. The specific structure of the compressor 1 is as described in the above embodiments. Since the refrigeration device 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 invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A stator for an electric machine, characterized in that The motor comprises: a stator core comprising a stator yoke and a plurality of stator teeth spaced along the inner side of the stator yoke, the stator teeth comprising a tooth body portion and a tooth shoe portion; an insulation end plate provided at the end of the stator core, the insulation end plate comprising an outer insulation plate, an inner insulation plate and a connecting plate connected between the outer insulation plate and the inner insulation plate, the outer insulation plate being provided at the stator yoke, the connecting plate being provided at the tooth body portion, and the inner insulation plate being provided at the tooth shoe portion, windings being wound on the tooth body portion and the connecting plate; a rib provided on the side of the connecting plate away from the stator core, one end of the rib being connected to the inner wall surface of the outer insulation plate and the other end of the rib being used to contact the outermost windings to limit the outermost windings from approaching the inner wall surface of the outer insulation plate; the number of stator slots of the motor is Q, the number of phases of the motor is m, the number of ribs is k1, m≤k1≤Q*n, and 1≤n≤3; the outer radius of the outer insulation plate is d1, the inner radius of the outer insulation plate is d2, the outer radius of the inner insulation plate is d3, the inner radius of the inner insulation plate is d4, and 0.1≤(d1-d2) / (d3-d4)≤2; The stator slot number of the motor is Q, the width of the connecting plate is w1, 0.5≤ ≤1.

5.

2. The stator of claim 1, wherein a plurality of ribs are provided on the connecting plate, and each rib is symmetrically arranged about the geometric center line of the connecting plate.

3. The stator of claim 1, wherein The shortest distance from the rib to the center of the stator is d5, and 0.1≤(d1-d2) / (d2-d5)≤2.

4. The stator of claim 1, wherein The height of the outer insulation plate is h1, the height of the inner insulation plate is h2, and the height of the rib is h3, and 0.1≤(h1-h3) / (h2-h3)≤2.

5. The stator of claim 1, wherein The width of the rib is w2, and 0<w2 / w1≤1.

6. The stator of claim 1, wherein The rib is integrally injection molded with the insulation end plate.

7. The stator of claim 1, wherein The rib is configured as any one of a cylinder and a polyhedron.

8. An electric machine characterized by The motor comprises the stator as claimed in any one of claims 1 to 7.

9. A compressor characterized by, The motor comprises the motor as claimed in claim 8.

10. A refrigeration appliance characterized in that, The compressor comprises the compressor as claimed in claim 9.

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