Stator core sheet, stator core, motor, and compressor

Abstract

This application discloses a stator core sheet, a stator core, a motor, and a compressor. The stator core sheet includes a yoke and Q teeth, the yoke being annular, and the Q teeth being spaced apart along the circumferential direction of the inner annular surface of the yoke, thereby forming a stator rod between two spaced teeth on the inner annular surface of the yoke, the stator rod including a tooth groove wall located on the teeth and a yoke groove wall located on the inner annular surface, the maximum thickness from the yoke groove wall to the outer annular surface of the yoke being L1, the width of the teeth being H1, and the relationship between Q, L1 and H1 being 0.08 ≤ L1 / (H1 × Q) ≤ 0.11.

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application No. 202410230374.6 filed with the China National Intellectual Property Administration on February 29, 2024, and Chinese Patent Application No. 202420394215.5 filed with the China National Intellectual Property Administration on February 29, 2024, and all of its contents are incorporated herein by reference.

[0002] This application relates to the technical field of motors, and particularly to stator core sheets, stator cores, motors, and compressors.

Background Art

[0003] The stator of a motor is formed by laminating a single stator core sheet, and the winding is wound around the stator of the generator. When the frame model of the generator is different, the model and dimensions of the stator core sheet are also different. The stator core sheet is one of the main components of a single-phase generator, and parameters such as the dimensions of its yoke, the dimensions of the slots, and the tooth width not only affect the stator rigidity but also significantly affect the motor efficiency.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The main object of this application is to provide a stator core sheet to improve the stator rigidity and the motor efficiency.

Means for Solving the Problems

[0005] To achieve the above object, the stator core sheet proposed by this application is a yoke portion that is annular, and Q tooth portions, and the Q tooth portions are provided at intervals along the circumferential direction of the inner annular surface of the yoke portion, whereby a stator slot is formed between two of the tooth portions spaced apart on the inner annular surface of the yoke portion. The status slot includes a tooth groove wall located in the tooth portion and a yoke groove wall located in the inner annular surface. The maximum thickness from the yoke groove wall to the outer annular surface of the yoke portion is L1, the width of the tooth portion is H1, and the relationship among Q, L1, and H1 is 0.08 ≦ L1 / (H1×Q) ≦ 0.11.

[0006] Exemplarily, the distance from the center of the stator core sheet to the midpoint of the yoke groove wall is D1, and the distance from the center of the stator core sheet to at least one point other than D1 existing on the yoke groove wall is D2, and D2 < D1 is satisfied.

[0007] Exemplarily, the included angle between the yoke groove wall and the tooth groove wall is A, and the range of A is 80° ≦ A ≦ 100°.

[0008] Exemplarily, when the number Q of the tooth portions is 9, the relationship among Q, L1, and H1 is 0.085 ≦ L1 / (H1×Q) ≦ 0.095.

[0009] Exemplarily, when the number Q of the tooth portions is 12, the relationship among Q, L1, and H1 is 0.085 ≦ L1 / (H1×Q) ≦ 0.11.

[0010] Exemplarily, when the number Q of the tooth portions is 15, the relationship among Q, L1, and H1 is 0.08 ≦ L1 / (H1×Q) ≦ 0.095.

[0011] Exemplarily, the position of the maximum thickness from the yoke groove wall to the outer annular surface of the yoke portion is provided near the tooth portion.

[0012] Exemplarily, the distance between the midpoint of the yoke groove wall and the outer annular surface of the yoke portion is L2, and the relationship among L2, Q, and H1 is 0.07 ≦ L2 / (H1×Q) ≦ 0.1.

[0013] For example, a cut edge is provided on the outer annular surface of the yoke portion, the minimum distance from the yoke groove wall to the cut edge is L3, and the relationship between L3, Q, and H1 is 0.06 ≤ L3 / (H1 × Q) ≤ 0.09.

[0014] For example, a groove is provided on the outer annular surface of the yoke portion, and the minimum distance between the intersection of the yoke groove wall and the teeth groove wall and the groove wall of the groove is L4, and the relationship between L4, Q, and H1 is 0.05 ≤ L4 / (H1 × Q) ≤ 0.07.

[0015] This application also proposes a stator core comprising a plurality of the above-mentioned stator core sheets, wherein the plurality of stator core sheets are arranged in a laminated manner.

[0016] Exemplary, the stator core includes two end core sheets located at the ends of the stator core, and several intermediate core sheets provided between the two end core sheets, wherein the maximum distance from the yoke groove wall of the end core sheet to the outer annular surface of the yoke portion is L11, and the maximum distance from the yoke groove wall of the intermediate core sheet to the outer annular surface of the yoke portion is L12, and L11 of at least one of the end core sheets is less than L12.

[0017] For example, the width of the teeth portion of the end core sheet is H11, and the width of the teeth portion of the intermediate core sheet is H12, and at least one of the end core sheets has a tooth width of less than H12.

[0018] This application also proposes a motor including the stator core described above.

[0019] This application also proposes a compressor including the motor described above. [Brief explanation of the drawing]

[0020] To more clearly explain the technical solutions in the embodiments of this application or related technologies, the drawings necessary for the description of the embodiments or related technologies will be briefly described below. However, the drawings in the following description are only some embodiments of this application, and it is obvious to those skilled in the art that based on the configurations shown in these drawings, other drawings can be obtained without creative effort.

[0021] [Figure 1] It is a structural schematic diagram of the first embodiment of the stator core sheet of this application. [Figure 2] It is a partial enlarged view of part A in FIG. 1. [Figure 3] It is a structural schematic diagram of the second embodiment of the stator core sheet of this application. [Figure 4] It is a structural schematic diagram of the third embodiment of the stator core sheet of this application. [Figure 5] It is a structural schematic diagram of the fourth embodiment of the stator core sheet of this application. [Figure 6] It is a structural schematic diagram of an embodiment of the stator core of this application. [Figure 7] It is a cross-sectional structural schematic diagram of the stator core in FIG. 6. [Figure 8] It is a cross-sectional structural schematic diagram of the motor. [Figure 9] It is a schematic diagram of the change of the angle L1 / (H1×Q) of the rigidity and motor efficiency of this application. [Figure 10] It is a schematic diagram comparing the noise of the compressor of this application with that of the prior art.

[0022] The achievement of the object, functional characteristics and advantages of this application will be further described in conjunction with the accompanying drawings and embodiments.

Modes for Carrying Out the Invention

[0023] The technical solutions in the embodiments of this application will be described clearly and completely below with reference to the drawings in the embodiments of this application, although it is clear that the embodiments described are only a part of the embodiments of this application and not all of them. All other embodiments that a person skilled in the art could obtain without creative work based on the embodiments of this application are within the scope of protection of this application.

[0024] All directional indicators in the embodiments of this application (e.g., up, down, left, right, front, back, etc.) are used solely to describe the relative positional relationships and motion conditions between each component in a particular orientation (as shown in the drawings), and if that particular orientation changes, the directional indicators will also change accordingly.

[0025] In this application, unless otherwise explicitly stated and limited, terms such as “connection,” “fixed,” etc., should be understood in a broad sense. For example, “fixed” may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. Unless otherwise explicitly stated, it may be a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interaction relationship between two elements. The specific meaning of the above terms in this application can be understood by those skilled in the art depending on the context.

[0026] Furthermore, in embodiments of this application, where there are descriptions relating to "first," "second," etc., such descriptions are for explanatory purposes only and should not be understood as indicating or implying their relative importance or the number of technical features to be shown. Accordingly, features limited by "first," "second," etc. may explicitly or implicitly include at least one such feature. Also, "and / or" in the whole text includes three parallel forms, taking "A and / or B" as an example, including solution A, solution B, and solution A and B satisfying simultaneously. Furthermore, the technical solutions of each embodiment may be combined with each other, but must be based on what a person skilled in the art can achieve, and if a combination of technical solutions is mutually contradictory or unrealistic, such a combination of technical solutions should be deemed not to exist and not to be included in the scope of protection claimed in this application.

[0027] This application proposes a stator core sheet.

[0028] Referring to Figures 1, 2, and 9, in one embodiment of the present application, the stator core sheet includes a yoke portion 100 and Q teeth portions 200, the yoke portion 100 being annular, and the Q teeth portions 200 being spaced apart along the circumferential direction of the inner annular surface of the yoke portion 100, thereby forming a stator rod 300 between two spaced teeth portions 200 on the inner annular surface of the yoke portion 100, the stator rod 300 including a tooth groove wall 310 located on the teeth portion 200 and a yoke groove wall 320 located on the inner annular surface, the maximum thickness from the yoke groove wall 320 to the outer annular surface of the yoke portion 100 being L1, the width of the teeth portion 200 being H1, and the relationship between Q, L1, and H1 being 0.08 ≤ L1 / (H1 × Q) ≤ 0.11.

[0029] The width of the teeth 200 affects not only the stator rigidity but also the motor efficiency. The wider the teeth 200, the stronger the generated magnetic field and the greater the torque that can be generated. However, in reality, the width of the teeth 200 should not be too wide; if it is too wide, the magnetic flux path between the teeth 200 becomes incomplete, and the motor efficiency decreases. If the width of the teeth 200 is too narrow, oscillations in the alternating magnetic field occur, generating noise. Therefore, it is necessary to stably control the width of the teeth 200 within an appropriate range. The width of the teeth 200 also affects the motor temperature rise and losses. If the width of the teeth 200 is too narrow, the local current density becomes too high, leading to problems of heat generation and decreased motor efficiency. Conversely, if the width of the teeth 200 is too wide, the magnetic flux distribution becomes irrational, and the motor efficiency is also affected. Furthermore, the width from the yoke groove wall 320 to the outer annular surface of the yoke section 100 not only affects rigidity, but also improves stator rigidity as the width increases. The width from the yoke groove wall 320 to the outer annular surface of the yoke section 100 also affects the area of ​​the stator rod 300. A smaller area of ​​the stator rod 300 reduces motor efficiency. In addition, generally, increasing the number of teeth 200 improves motor efficiency and output power, but if there are too many teeth 200, the motor saturates, reducing the motor's output power. Therefore, the maximum thickness L1 from the yoke groove wall 320 to the outer annular surface of the yoke section 100, the width H1 of the teeth 200, and the number of teeth 200 have a significant impact on stator rigidity and motor efficiency.

[0030] Figure 9 is a schematic diagram of the changes in stator stiffness and motor efficiency with respect to angle L1 / (H1×Q). In this solution, the schematic diagram of the changes in stiffness and motor efficiency with respect to angle L1 / (H1×Q) shown in Figure 9 is obtained by using parametric design sweeps of L1, Q, and H1, L1 / (H1×Q) global parametric design, and simulation experiments.

[0031] As can be seen by referring to Fig. 9, when L1 / (H1×Q) is less than 0.085, the stator rigidity is positively correlated with L1 / (H1×Q), and as L1 / (H1×Q) gradually increases, the stator rigidity gradually improves. On the other hand, even when L1 / (H1×Q) is greater than 0.085, the stator rigidity is positively correlated with L1 / (H1×Q), but as L1 / (H1×Q) gradually increases, the improvement of the stator rigidity gradually stabilizes. When L1 / (H1×Q) is less than 0.11, the motor efficiency is negatively correlated with L1 / (H1×Q), and as L1 / (H1×Q) gradually increases, the motor efficiency gradually decreases, but the decrease in the motor efficiency becomes relatively gentle. Even when L1 / (H1×Q) is greater than 0.11, the motor efficiency is negatively correlated with L1 / (H1×Q), but as L1 / (H1×Q) gradually increases, the motor efficiency rapidly decreases. From this, when the range of L1 / (H1×Q) is limited to 0.08 - 0.11, both the stator rigidity and the motor efficiency are improved.

[0032] Also, the distance from the center of the stator core sheet to the midpoint of the yoke groove wall 320 is D1, and the distance from the center of the stator core sheet to at least one point on the yoke groove wall 320 other than D1 existing thereon is D2, and D2 < D1 is satisfied. That is, there is at least one point on the yoke groove wall 320 close to the teeth portion 200 where the distance to the center of the stator core sheet is smaller than the distance from the center of the stator core sheet to the midpoint of the inner wall of the yoke. In the prior art, the inner wall of the yoke of the stator slot 300 is generally designed in an arc shape, and this arc is equidistant from the center of the stator core sheet. As a result, the strength distribution of the stator structure becomes unreasonable, the modality of the stator is poor, and the noise is high. In this solution, by setting the distance from at least one point on the yoke groove wall 320 close to the teeth portion 200 to the center of the stator core sheet to be smaller than the distance from the center of the stator core sheet to the midpoint of the inner wall of the yoke, the structural strength of the stator is improved, and further, the structural strength distribution of the stator is made uniform. Therefore, the modality of the stator is good, the rigidity is good, and thereby low noise is achieved.

[0033] Figure 10 is a schematic diagram comparing the noise of the compressor of the present solution with that of the prior art. As can be seen by referring to Figure 10, the stator core sheet proposed in this solution, when applied to a compressor, can effectively reduce the noise of the compressor. Therefore, the technical solution of this application can improve stator rigidity, significantly optimize the noise of the motor and compressor, and improve the efficiency of the motor and compressor.

[0034] A transition chamfer is provided between the tooth groove wall 310 and the yoke groove wall 320, and neither the tooth groove wall 310 nor the yoke groove wall 320 has this transition chamfer.

[0035] For example, if the number of teeth 200 Q is 9, the relationship between Q, L1, and H1 is 0.085 ≤ L1 / (H1 × Q) ≤ 0.095. Parametric design and experimentation of L1 / (H1 × Q) for the number of teeth 200 is 9 shows that as L1 / (H1 × Q) increases, the stator stiffness improves. When L1 / (H1 × Q) is 0.085 or less, as L1 / (H1 × Q) increases, the stator stiffness improves significantly. When L1 / (H1 × Q) is 0.085 or greater, the increase in stator stiffness stabilizes. On the other hand, the motor efficiency of the motor decreases as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.095 or less, the decrease in motor efficiency becomes gradual as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.095 or more, the motor efficiency decreases significantly as L1 / (H1×Q) increases. Therefore, when the number of teeth 200 is 9, limiting L1 / (H1×Q) to 0.085 to 0.095 results in good stator rigidity and motor efficiency.

[0036] For example, if the number Q of the teeth section 200 is 12, the relationship between Q, L1, and H1 is 0.085 ≤ L1 / (H1 × Q) ≤ 0.11. If the number Q of the stator rod 300 is 12, parametric design and experimentation of L1 / (H1 × Q) shows that as L1 / (H1 × Q) increases, the stator stiffness improves. If L1 / (H1 × Q) is 0.085 or less, the stator stiffness improves significantly as L1 / (H1 × Q) increases, and if L1 / (H1 × Q) is 0.085 or greater, the increase in stator stiffness stabilizes. On the other hand, the motor efficiency of the motor decreases as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.11 or less, the decrease in motor efficiency becomes gradual as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.11 or more, the motor efficiency decreases significantly as L1 / (H1×Q) increases. As can be seen from this, limiting the range of L1 / (H1×Q) to 0.085 to 0.11 results in good stator rigidity and motor efficiency.

[0037] In the first embodiment, the number Q of the stator rods is 12, the outer diameter of the stator core sheet is 101 mm, the distance D1 from the center of the stator core sheet to the midpoint of the yoke groove wall 320 of the stator rod is set to, for example, 43 mm, the distance from any point on the yoke groove wall 320 other than D1 to the center of the stator core sheet is set to D2, with a minimum dimension D2min, for example, in the yoke groove wall 320 close to the position of the stator teeth (excluding the chamfered position between the yoke groove wall 320 and the teeth groove wall 310), D2min = 42 mm and D1 > D2min. Furthermore, the maximum physical thickness from the yoke groove wall 320 of the stator rod 300 to the outer annular surface of the yoke portion 100 is set to L1, for example, L1 is set to 8 mm, and similarly, the L1 position does not include the chamfered position between the yoke groove wall 320 and the teeth groove wall 310. Q = 12, and H1 is designed to be, for example, 6.5 mm. L1 / (H1 × Q) = 8 / (6.5 × 12) = 0.103. The interpretation is the same for other embodiments.

[0038] For example, if the number of teeth 200 Q is 15, the relationship between Q, L1, and H1 is 0.08 ≤ L1 / (H1 × Q) ≤ 0.095. When the number of teeth 200 is 15, parametric design and experimentation of L1 / (H1 × Q) shows that the stator stiffness increases as L1 / (H1 × Q) increases. When L1 / (H1 × Q) is 0.08 or less, the stator stiffness improves significantly as L1 / (H1 × Q) increases, and when L1 / (H1 × Q) is 0.08 or greater, the increase in stator stiffness stabilizes. On the other hand, the motor efficiency of the motor decreases as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.095 or less, the decrease in motor efficiency becomes gradual as L1 / (H1×Q) increases. When L1 / (H1×Q) is 0.095 or more, the motor efficiency decreases significantly as L1 / (H1×Q) increases. As can be seen from this, limiting the range of L1 / (H1×Q) to 0.08 to 0.095 results in good stator rigidity and motor efficiency.

[0039] Furthermore, the point of maximum thickness from the yoke groove wall 320 to the outer annular surface of the yoke portion 100 is located near the teeth portion 200, which is advantageous in improving the space factor of the stator rod 300 while ensuring the rigidity of the stator.

[0040] For example, the distance from the midpoint of the yoke groove wall 320 to the outer annular surface of the yoke portion 100 is denoted as L2, and the relationship between L2, Q, and H1 is 0.07 ≤ L2 / (H1 × Q) ≤ 0.1. Considering that the position of the cut edge 110 affects the distance from the yoke groove wall 320 to the outer annular surface of the yoke portion 100, that is, it affects the width of the yoke portion 100, and that the midpoint of the yoke groove wall 320 is generally the position on the yoke groove wall 320 closest to the outer annular surface of the yoke portion 100, and that the distance from the yoke groove wall 320 to the outer annular surface of the yoke portion 100, the width of the teeth portion 200, and the number of teeth portion 200 inseparably affect the stator rigidity and motor efficiency, the results of global parametric design and simulation experiments of L2 / (H1×Q) show that limiting L2 / (H1×Q) to 0.07~0.1 is advantageous for improving stator rigidity, significantly optimizing motor and compressor noise, and improving motor and compressor efficiency.

[0041] Referring to Figures 3 and 4, exemplarily, a cut edge 110 is provided on the outer annular surface of the yoke portion 100, the minimum distance from the yoke groove wall 320 to the cut edge 110 is L3, and the relationship between L3, Q, and H1 is 0.06 ≤ L3 / (H1 × Q) ≤ 0.09. Because a portion of the cut edge 110 faces the yoke groove wall 320 of the stat rod 300, or because the end of the cut edge 110 faces the yoke groove wall 320 of the stat rod 300, the minimum distance from the yoke groove wall 320 to the cut edge 110 is at the narrowest width of the entire yoke section 100. Furthermore, the distance from the yoke groove wall 320 to the outer annular surface of the yoke section 100, the width of the teeth section 200, and the number of teeth section 200 inextricably affect the stator rigidity and motor efficiency. Therefore, global parametric design and simulation experiments of L3 / (H1×Q) show that limiting L3 / (H1×Q) to 0.06~0.09 is advantageous for improving stator rigidity, significantly optimizing motor and compressor noise, and improving motor and compressor efficiency.

[0042] Referring to Figure 5, to further improve the oil return of the compressor, radially inward grooves 120 are provided on the outer wall of the stator.

[0043] A groove 120 is provided on the outer annular surface of the yoke section 100. The minimum distance between the intersection of the yoke groove wall 320 and the teeth groove wall 310 and the groove wall of the groove 120 is defined as L4, and the relationship between L4, Q, and H1 is 0.05 ≤ L4 / (H1 × Q) ≤ 0.07. The position of the groove 120 affects the distance from the yoke groove wall 320 to the outer annular surface of the yoke section 100, that is, it affects the width of the yoke section 100. Considering that the distance from the yoke groove wall 320 to the outer annular surface of the yoke section 100, the width of the teeth section 200, and the number of teeth section 200 inextricably affect the stator rigidity and motor efficiency, global parametric design and simulation experiments of L4 / (H1 × Q) show that limiting L4 / (H1 × Q) to 0.05 ~ 0.07 is advantageous for improving stator rigidity, significantly optimizing motor and compressor noise, and improving motor and compressor efficiency.

[0044] Furthermore, L4 refers to the minimum distance from the yoke groove wall 320 of the status rod 300 or the transition chamfer between the yoke groove wall 320 of the status rod 300 and the teeth groove wall 310 to the groove 120.

[0045] For example, if the outer annular surface of the yoke portion 100 corresponding to the midpoint of the yoke groove wall 320 of the stator rod 300 is a cut edge 110 or groove 120, stator rigidity is ensured by defining L2 as the radial physical dimension of that position.

[0046] Furthermore, the distance from a point on the yoke groove wall 310 of the stator rod 300 to the center of the stator core sheet decreases as it approaches the teeth portion 200, thereby resulting in a uniform distribution of modes and stiffness.

[0047] Referring to Figure 5, exemplarily, the angle between the yoke groove wall 320 and the teeth groove wall 310 is denoted as A, and the range of A is 80° ≤ A ≤ 100°. Parametric design and experimentation were performed on the space factor at each angle A, and the results showed that when angle A is 80° or less, A has a positive correlation with the space factor; that is, as the angle gradually increases, the space factor also gradually increases, but the space factor is relatively low. When angle A is between 80° and 100°, as the angle gradually increases, the space factor also gradually increases, and the space factor is large. When angle A is between 80° and 100°, the space factor reaches its maximum, and when angle A is 100° or more, A has a negative correlation with the space factor; as the angle gradually increases, the space factor gradually decreases, but the space factor is relatively large between 80° and 100°. As can be seen from this, when A is in the range of 80° to 100°, the stator's packing factor is made relatively good, thereby improving the motor's efficiency and power factor, reducing energy consumption, improving the motor's output torque and power density, and further improving the compressor's energy efficiency.

[0048] Referring to Figure 2, exemplary, the shape of the inner wall of the status rod 300 consists of at least two straight or curved sections, and the angle A between the tangent of the straight or curved section near the teeth section 200 and the teeth section 200 is limited to 80° ≤ A ≤ 100°. The shape of the yoke groove wall 310 near the teeth section 200 is configured as a straight or curved section, and the limitation of the tangent of the straight or curved section and the angle A between the yoke groove wall 310 and the teeth groove wall 310 to 80° to 100° is advantageous for the tangent of the yoke groove wall 310 and the teeth groove wall 310 of the status rod 300 to be approximately right-angle, which is advantageous for winding arrangement. In this application, through extensive experimentation, it has been verified that in this embodiment, the winding space factor can be improved by 5%, thereby improving the energy efficiency of the permanent magnet motor and compressor.

[0049] Referring to Figures 6 and 7, this application also proposes a stator core comprising a plurality of stator core sheets, the specific structure of which can be found in the above embodiments. Since this stator core employs all of the technical solutions of the above embodiments, it has at least all of the beneficial effects brought about by the technical solutions of the above embodiments, but this will not be explained in detail here.

[0050] Exemplary, the stator core includes two end core sheets 400 located at the ends of the stator core and several intermediate core sheets 500 located between the two end core sheets 400, where the maximum distance from the yoke groove wall of the end core sheet 400 to the outer annular surface of the yoke portion 100 is L11, and the maximum distance from the yoke groove wall of the intermediate core sheet 500 to the outer annular surface of the yoke portion 100 is L12, and L11 of at least one of the end core sheets is less than L12. This is advantageous because it creates a recessed step between the end core sheets 400 and the intermediate core sheets 500 toward the intermediate core sheets 500, thereby enabling recession of the insulating frame, reducing the dimensions of the winding ends, improving motor efficiency, and lowering the cost of the motor.

[0051] For example, the width of the teeth portion 200 of the end core sheet 400 is H11, and the width of the teeth portion 200 of the intermediate core sheet 500 is H12, with at least one of the end core sheets having a width of H11 less than H12. This is advantageous because it creates a recessed step between the end core sheet 400 and the intermediate core sheet 500, thereby enabling recession of the insulating frame, reducing the dimensions of the winding ends, improving motor efficiency, and lowering motor costs.

[0052] This application also proposes a motor, which includes a stator core, and the specific structure of the stator core is described by the above embodiment. Since this motor employs all of the technical solutions of the above embodiment, it has at least all of the beneficial effects brought about by the technical solutions of the above embodiment, but this will not be described in detail here.

[0053] Specifically, the motor includes a stator and a rotor fitted to the stator. The stator includes a stator core and windings. The stator core is formed by axially stacking the stator core sheets described above, and the windings are provided on the stator rod 300. The rotor includes a rotor core and permanent magnets. The permanent magnets are provided in permanent magnet slots. The rotor further has a plurality of through-holes that penetrate axially, each having an area of ​​30 mm² along the plane perpendicular to the axis. 2 This setting reduces the rotor's resistance to the compressor gas.

[0054] Here, the conductor of the winding may be, for example, a copper wire or an aluminum wire, but is not limited to these, and the specific material of the conductor is not limited here.

[0055] This is due to the following advantages of copper wire. Firstly, copper wire has high conductivity, approximately 310 times that of pure mercury, about twice that of pure aluminum, and even better than gold. Therefore, copper wire can carry more current with less energy loss, making it more energy-efficient. Secondly, copper wire has stable conductivity, and its resistivity and conductivity remain relatively stable under normal temperature and humidity conditions. Compared to other materials, copper wire exhibits less change in electrical properties even in high-temperature and high-humidity environments. Thirdly, copper wire has high mechanical strength, and compared to other metal conductor materials, copper wire has superior mechanical strength, tensile strength, and pressure resistance, resulting in improved reliability and durability during use. Fourthly, copper wire is easy to process and has relatively good workability, allowing it to be manufactured into various specifications through processes such as wire drawing and rolling. Furthermore, copper wire is also highly workable in welding and crimping techniques.

[0056] Furthermore, aluminum wire not only possesses good conductivity and can efficiently transmit electricity, but more importantly, its low cost contributes to reducing the production cost of motors.

[0057] This application also proposes a compressor, which includes a motor, the specific structure of which can be found in the above-described embodiment. Since this compressor employs all the technical solutions of the above-described embodiment, it has at least all the beneficial effects provided by the technical solutions of the above-described embodiment, but these will not be described in detail here.

[0058] As shown in Figure 10, in the compressor noise spectrum, the noise of this application is significantly improved compared to existing technology in the frequency bands of 500Hz, 1000Hz, 1600Hz, 2000Hz, and 4000Hz related to the motor, and the compressor noise OA value is also significantly improved compared to the conventional technology (3-5dB improvement). It was found that the stator core sheet proposed in this application, when applied to the compressor, is useful in reducing compressor noise.

[0059] The above are merely embodiments of the present application and do not limit the scope of the patent. Any equivalent structural transformations or other direct / indirect applications to the relevant technical fields using the specifications and accompanying drawings of this application, under the inventive concept of this application, are all included within the scope of the patent protection of this application. [Explanation of Symbols]

[0060] 100...Yoke section, 110...Cut edge, 120...Groove, 200...Teeth section, 300...Status rod, 310...Teeth groove wall, 320...Yoke groove wall, 400...End core sheet, 500...Intermediate core sheet.

Claims

1. A stator core sheet, wherein the stator core sheet is The ring-shaped yoke section, It includes Q teeth, The Q teeth are provided spaced apart along the circumferential direction of the inner annular surface of the yoke, thereby forming a status rod between two spaced teeth on the inner annular surface of the yoke. The status rod includes a tooth groove wall located in the tooth portion and a yoke groove wall located in the inner annular surface, The maximum thickness from the yoke groove wall to the outer annular surface of the yoke portion is L1, and the width of the teeth portion is H1. The relationship between Q, L1, and H1 is 0.08 ≤ L1 / (H1 × Q) ≤ 0.

11. Stator core sheet.

2. The distance from the center of the stator core sheet to the midpoint of the yoke groove wall is D1, and the distance from the center of the stator core sheet to at least one point on the yoke groove wall other than D1 is D2, such that D2 < D1. The stator core sheet according to claim 1.

3. The angle between the yoke groove wall and the teeth groove wall is denoted as A, and the range of A is 80° ≤ A ≤ 100°. The stator core sheet according to claim 1 or 2.

4. When the number of teeth Q is 9, the relationship between Q, L1, and H1 is 0.085 ≤ L1 / (H1 × Q) ≤ 0.

095. A stator core sheet according to any one of claims 1 to 3.

5. When the number of teeth Q is 12, the relationship between Q, L1, and H1 is 0.085 ≤ L1 / (H1 × Q) ≤ 0.

11. A stator core sheet according to any one of claims 1 to 4.

6. When the number of teeth Q is 15, the relationship between Q, L1, and H1 is 0.08 ≤ L1 / (H1 × Q) ≤ 0.

095. A stator core sheet according to any one of claims 1 to 5.

7. The position of the maximum thickness from the yoke groove wall to the outer annular surface of the yoke portion is located near the teeth portion. A stator core sheet according to any one of claims 1 to 6.

8. The distance between the midpoint of the yoke groove wall and the outer annular surface of the yoke portion is L2, and the relationship between L2, Q, and H1 is 0.07 ≤ L2 / (H1 × Q) ≤ 0.

1. A stator core sheet according to any one of claims 1 to 7.

9. A cut edge is provided on the outer annular surface of the yoke portion, the minimum distance from the yoke groove wall to the cut edge is L3, and the relationship between L3, Q, and H1 is 0.06 ≤ L3 / (H1 × Q) ≤ 0.

09. A stator core sheet according to any one of claims 1 to 8.

10. A groove is provided on the outer annular surface of the yoke portion, and the minimum distance between the intersection of the yoke groove wall and the teeth groove wall and the groove wall is L4, and the relationship between L4, Q, and H1 is 0.05 ≤ L4 / (H1 × Q) ≤ 0.

07. A stator core sheet according to any one of claims 1 to 9.

11. The present invention comprises a plurality of stator core sheets according to any one of claims 1 to 10, wherein the plurality of stator core sheets are arranged in a laminated manner. Stator core.

12. The stator core includes two end core sheets located at the ends of the stator core, and several intermediate core sheets provided between the two end core sheets, wherein the maximum distance from the yoke groove wall of the end core sheet to the outer annular surface of the yoke portion is L11, and the maximum distance from the yoke groove wall of the intermediate core sheet to the outer annular surface of the yoke portion is L12, and L11 of at least one of the end core sheets is less than L12. The stator core according to claim 11.

13. The width of the teeth portion of the end core sheet is H11, and the width of the teeth portion of the intermediate core sheet is H12, and the H11 of at least one of the end core sheets is less than H12. The stator core according to claim 12.

14. Includes a stator core according to any one of claims 11 to 13 Motor.

15. Includes the motor described in claim 14 Compressor.

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