Stator core, motor and compressor

Abstract

This invention discloses a stator core, a motor, and a compressor, relating to the field of motor technology. The stator core includes multiple stacked stator laminations, each lamination comprising a stator yoke and multiple stator teeth located inside the stator yoke. A stator slot is defined between two adjacent stator teeth. Each stator lamination has multiple first tangents along its outer periphery in the circumferential direction. These first tangents extend axially through the stator core, with a maximum radial depth of H1, where H1 ≥ 1.5 mm. The total area of ​​the stator slots in the laminations is S1, and the total area of ​​the stator yoke and stator teeth is S2, satisfying the relationship: 0.39 ≤ S1 / S2 ≤ 0.51. The technical solution provided by this invention improves the performance of the motor and compressor system through the design of the stator core structural parameters.

Description

Technical Field

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

[0002] In high-efficiency power equipment such as compressors and drive motors for new energy vehicles, the stator core, as the core component of the motor's magnetic circuit, directly affects electromagnetic performance, vibration and noise, and system energy efficiency. With the upgrading of energy efficiency standards for home appliances and the increasing range requirements of new energy vehicles, motor systems must simultaneously meet the requirements of "high efficiency, low noise, and miniaturization".

[0003] Optimizing the stator stub during motor design can not only improve motor efficiency but also enhance the internal flow field distribution of the compressor, thereby reducing compressor noise, improving heat dissipation for both the compressor and motor, and increasing compressor energy efficiency. However, improper stator stub design can lead to uneven distribution of electromagnetic forces in the motor, causing vibrations in the stator core or housing. This vibration is transmitted to the compressor pump body through the mechanical structure, interfering with the internal flow field of the compressor, increasing refrigerant flow losses, and consequently causing problems such as increased noise, uneven heat dissipation, and reduced efficiency in the compressor. Summary of the Invention

[0004] The main objective of this invention is to propose a stator core, a motor, and a compressor, aiming to improve the performance of the motor and compressor system through the design of stator core structural parameters.

[0005] To achieve the above objectives, the present invention proposes a stator core comprising: a plurality of stacked stator laminations, each stator lamination including a stator yoke and a plurality of stator teeth disposed inside the stator yoke, wherein a stator slot is defined between two adjacent stator teeth; a plurality of first tangents are provided along the circumferential direction on the outer periphery of each stator lamination; the first tangents are provided through the axial direction of the stator core, and the maximum radial depth of the first tangents in the stator lamination is H1, where H1 ≥ 1.5 mm; the total area of ​​the stator slots of the stator laminations is S1, and the total area of ​​the stator yoke and the stator teeth of the stator laminations is S2, satisfying the relationship: 0.39 ≤ S1 / S2 ≤ 0.51.

[0006] In one embodiment, the first cutting edge is distributed in m circumferentially along the outer periphery of the stator yoke, and the central angle corresponding to a single first cutting edge is α, where: 1<m≤16, 4°≤α≤105°.

[0007] In one embodiment, the stator lamination is provided with a rivet for stacking and connecting, and the outer periphery of the stator lamination is also provided with a second tangent in the circumferential region corresponding to the rivet. The maximum depth of the second tangent in the radial direction of the stator core is H2, where H2 < 1.5 mm.

[0008] In one embodiment, n second cutting edges are distributed circumferentially along the outer periphery of the stator yoke, and the central angle corresponding to a single second cutting edge is β, wherein 0≤n≤16 and 4°≤β≤31°.

[0009] In one embodiment, the radius of the stator lamination is R, where R, α, β, S1, and S2 satisfy the following relationship: .

[0010] In one embodiment, the maximum inner diameter of the stator core is D, where 90mm ≤ D ≤ 200mm.

[0011] In one embodiment, the maximum yoke width of the stator yoke in the radial direction of the stator core is L1, and the minimum yoke width is L2, satisfying the relationship: 0≤L1-L2≤0.5mm.

[0012] In one embodiment, the first cut edge is a non-concentric curved surface structure formed by material removal from the outer periphery of the stator yoke or a groove structure opening towards the outer periphery, which makes the outer circle of the stator core have a non-circular outline.

[0013] The present invention also proposes an electric motor, comprising a stator core as described above.

[0014] The present invention also proposes a compressor comprising the motor described above.

[0015] The technical solution of this invention balances the winding space within the slots and the magnetic field area of ​​the yoke by limiting the ratio of the total stator slot area to the total core area to 0.39 ≤ S1 / S2 ≤ 0.51, thus avoiding magnetic circuit saturation, reducing iron and copper losses, and improving motor efficiency. The outer periphery magnetic permeability path is optimized by using a first tangential edge (depth H1 ≥ 1.5 mm), resulting in a more uniform radial electromagnetic force distribution, reducing core vibration amplitude, minimizing electromagnetic force fluctuations, and improving motor operational stability. When applied to compressors, it suppresses vibration interference with the internal flow field, reduces refrigerant eddies and pressure losses, and improves the overall energy efficiency ratio of the compressor. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the stator core provided by the present invention;

[0018] Figure 2 This is a schematic diagram of another embodiment of the stator core provided by the present invention;

[0019] Figure 3 This is a schematic diagram of another embodiment of the stator core provided by the present invention;

[0020] Figure 4 A schematic diagram of the structure of one embodiment of the first and second tangential edges;

[0021] Figure 5 A schematic diagram of a structure showing the maximum and minimum yoke widths of the stator yoke;

[0022] Figure 6 A schematic diagram of a structure for one embodiment of all first cut edges and all second cut edges;

[0023] Figure 7 for Figure 6 A schematic diagram of the structure of one embodiment of the first tangent edge;

[0024] Figure 8 for Figure 6 A schematic diagram of the structure of one embodiment of the second tangent edge;

[0025] Figure 9 This is a line graph showing the percentage improvement of various performance indicators of the "improved" electronic iron core compared to the "unimproved" version at different ratios.

[0026] Explanation of icon numbers:

[0027] 100. Stator core; 110. Stator lamination; 111. Stator yoke; 112. Stator teeth; 113. Stator slot; 114. First cut edge; 115. Second cut edge.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In high-efficiency power equipment such as compressors and drive motors for new energy vehicles, the stator core, as the core component of the motor's magnetic circuit, directly affects electromagnetic performance, vibration and noise, and system energy efficiency. With the upgrading of energy efficiency standards for home appliances and the increasing range requirements of new energy vehicles, motor systems must simultaneously meet the requirements of "high efficiency, low noise, and miniaturization".

[0033] Optimizing the stator stub during motor design can not only improve motor efficiency but also enhance the internal flow field distribution of the compressor, thereby reducing compressor noise, improving heat dissipation for both the compressor and motor, and increasing compressor energy efficiency. However, improper stator stub design can lead to uneven distribution of electromagnetic forces in the motor, causing vibrations in the stator core or housing. This vibration is transmitted to the compressor pump body through the mechanical structure, interfering with the internal flow field of the compressor, increasing refrigerant flow losses, and consequently causing problems such as increased noise, uneven heat dissipation, and reduced efficiency in the compressor.

[0034] To address this, the present invention proposes a stator core that improves the performance of the motor and compressor system through precise design of structural parameters.

[0035] Please see Figures 1 to 8In one embodiment of the present invention, the stator core 100 includes: a plurality of stacked stator laminations 110, each stator lamination 110 including a stator yoke 111 and a plurality of stator teeth 112 disposed inside the stator yoke 111, with a stator slot 113 defined between two adjacent stator teeth 112; each stator lamination 110 has a plurality of first tangents 114 disposed along the circumferential direction on its outer periphery; the first tangents 114 are axially extending through the stator core 100, and the maximum radial depth of the first tangents 114 in the stator lamination 110 is H1, where H1 ≥ 1.5 mm; the total area of ​​the stator slots 113 of the stator laminations 110 is S1 (…). Figure 1 (The shaded portion in the image), the total area of ​​the stator yoke 111 and the stator tooth 112 of the stator lamination 110 is S2 ( Figure 2 The shaded part in the equation satisfies the relationship: 0.39≤S1 / S2≤0.51.

[0036] The stator core 100 includes multiple stacked stator laminations 110. By stacking and fixing multiple layers of laminations (e.g., welding, snap-fitting), the overall mechanical strength of the core is improved, and eddy current losses are reduced. The stator laminations 110 are formed by stamping silicon steel sheets. The stator yoke 111 is an annular portion located on the outer periphery of the stator laminations 110 and is a key component of the magnetic circuit. It is responsible for closing the magnetic field of each stator tooth 112, ensuring uniform magnetic flux distribution. The stator teeth 112 are tooth-like structures uniformly distributed along the inner side of the yoke, used for winding the windings (enameled wire). Current generates a rotating magnetic field, which interacts with the rotor magnetic field to produce electromagnetic torque. The stator slots 113 are used to accommodate the windings. Their shape and size directly affect the winding density (slot fill factor) and electromagnetic force waveform. Increasing the slot fill factor can reduce copper losses.

[0037] The first cut edge 114 is a portion cut along the outer periphery of the lamination to adjust the distribution of the air gap magnetic field, suppress low-order harmonics, and reduce electromagnetic force fluctuations. Multiple first cut edges 114 are distributed circumferentially (e.g., 2, 4, 6, 8, etc.). The first cut edge 114 is axially continuous along the stator core 100, extending from one end of the core to the other (through the entire axial height), ensuring the consistency of electromagnetic performance along the height of the core and avoiding magnetic field distortion and increased vibration caused by local cut edges.

[0038] H1 represents the maximum radial depth of the first cut edge 114. A depth ≥ 1.5 mm can effectively alter the magnetic permeation path and reduce the amplitude of electromagnetic force harmonics. If the depth is insufficient (< 1.5 mm), the optimization effect is insignificant or even nonexistent. The depth H1 of the first cut edge 114 is a key parameter in the design of the stator core 100, and its value must comprehensively consider multiple factors such as electromagnetic performance, structural strength, vibration suppression effect, and manufacturing process. If H1 is too large, it will reduce the effective magnetic permeation area of ​​the stator yoke 111, leading to an increased risk of magnetic circuit saturation, an increase in excitation current, an increase in iron loss, and a decrease in motor efficiency. Therefore, it is necessary to ensure that the remaining thickness of the yoke after the first cut edge 114 can still meet the magnetic flux transmission requirements. The depth of the first cut edge 114 affects the air gap magnetic field distribution by changing the magnetic permeation path on the outer periphery of the stator. If H1 is too small, it may not effectively optimize the electromagnetic force harmonic components, resulting in insufficient vibration suppression; if it is too large, it may introduce new magnetic field distortion, which may exacerbate local electromagnetic force concentration. Therefore, the lower limit of H1 (≥1.5mm) is the minimum requirement for vibration suppression effect, ensuring that the electromagnetic force distribution can be effectively adjusted at the cut edge.

[0039] The upper limit of H1 is limited by a combination of factors including magnetic circuit saturation, structural strength, manufacturing process, and system integration. It needs to be determined through multivariate iterative optimization (usually requiring customized design based on specific motor power rating and compressor model). The maximum depth of H1 can be designed according to the actual stator size, and usually will not exceed half the yoke width of the stator yoke 111.

[0040] S1 determines the winding space; a larger area allows for more or thicker wires, reducing copper losses. S2 represents the total amount of magnetic core material, directly affecting magnetic circuit saturation. The S1 / S2 ratio is limited to 0.39-0.51 to balance the slot area (winding space) and the magnetic area (magnetic circuit performance). A ratio <0.4 results in insufficient slot fill factor (increased copper losses), while a ratio >0.5 results in insufficient magnetic area (increased iron losses). This design can improve the overall energy efficiency ratio of the compressor with a larger slot fill factor.

[0041] When the ratio S1 / S2 of the total area of ​​the stator slots 113 of the stator lamination 110 to the total area of ​​the stator yoke 111 and the teeth S2 is greater than 0.51 (the slot area is too large), the magnetic conductive area is insufficient and the electromagnetic force is unevenly distributed. Secondly, the stiffness of the stator core 100 is reduced. As the main supporting structure, the reduction in the area of ​​the yoke will lead to a weakening of the overall vibration resistance. Under the action of electromagnetic force and mechanical stress, it is more likely to deform, further amplifying vibration and noise. Moreover, the tangential failure of the edge design means that the excessively thin yoke may form stress concentration at the edge, increasing the risk of core fracture.

[0042] When the ratio of the total area S1 of the stator slots 113 of the stator lamination 110 to the total area S2 of the stator yoke 111 and teeth is less than 0.39 (the slot area ratio is too small), the small slot area limits the winding ampere and number of turns, resulting in a decrease in the air gap magnetic field strength and a decrease in the motor output torque. Although increasing the yoke area may enhance structural stability, an excessively small slot area will lead to a decrease in the electromagnetic efficiency of the motor, requiring an increase in current compensation output. However, this may cause electromagnetic noise due to an increase in current harmonics, thus negating the noise reduction effect of the chamfered design.

[0043] The technical solution of this invention balances the winding space within the slots and the magnetic field area of ​​the yoke by limiting the ratio of the total area of ​​the stator slots 113 to the total area of ​​the iron core to 0.39 ≤ S1 / S2 ≤ 0.51, thus avoiding magnetic circuit saturation, reducing iron and copper losses, and improving motor efficiency. The outer periphery magnetic permeability path is optimized by using the first tangential edge 114 (depth H1 ≥ 1.5 mm), resulting in a more uniform radial electromagnetic force distribution, reducing iron core vibration amplitude, reducing electromagnetic force fluctuations, and improving motor operational stability. When applied to compressors, it suppresses vibration interference with the internal flow field of the compressor, reduces refrigerant eddies and pressure losses, and improves the overall energy efficiency ratio of the compressor.

[0044] Regarding the measurement of H1 (the maximum radial depth of the first tangential edge 114), use tools such as vernier calipers to take any one of the stator laminations 110 of the stator core 100 (if the core has been assembled, the laminations need to be disassembled and separated); observe the outer periphery of the lamination and identify the "first tangential edge 114" (the recessed structure distributed along the circumferential direction); determine the "radial direction" of the tangential edge: take the center of the lamination as the origin and measure along the radial direction; measure the "maximum depth" of the tangential edge: the shortest radial distance from the outer periphery of the lamination (the arc part without tangential edge) to the bottom of the tangential edge is H1 (take the maximum value among all tangential edges); judgment criterion: if H1 ≥ 1.5mm, it meets the requirements of the scheme.

[0045] Regarding the measurement of S1 (total area of ​​stator slots 113), place the stator lamination 110 flat and use a scanner to obtain a high-resolution image of the lamination (which must include the complete outline and slot details), or obtain it by paper rubbing. Outline the contour of a single stator slot 113 (the area between two adjacent teeth) in the software and calculate the area of ​​a single slot; count the total number of stator slots 113 on the lamination (e.g., 24 slots, 36 slots), and multiply the area of ​​a single slot by the number of slots to obtain S1.

[0046] Regarding the measurement of S2 (the sum of the areas of the stator yoke 111 and the teeth), the outlines of "stator yoke 111" (the annular area within the outer perimeter and outside the teeth) and "all stator teeth 112" (including tooth tips, tooth bodies, and tooth roots) are drawn in the image of stator lamination 110 respectively; the areas of the yoke and the teeth are calculated using software, and the sum is obtained to obtain S2.

[0047] Reference Figure 3 and Figure 4 Specifically, the first cutting edge 114 is distributed in m circumferentially along the outer periphery of the stator yoke 111, and the central angle corresponding to a single first cutting edge 114 is α, where: 1 < m ≤ 16, 4° ≤ α ≤ 105°. That is, the number of cutting edges is 2 to 16, and they are distributed circumferentially along the outer periphery of the stator lamination 110 (e.g., 6, 8, 12, etc.). Usually, they are relatively distributed. m ≤ 16 is compatible with conventional stamping dies (multi-station progressive dies). If the number exceeds 16, the number of die cutting edges is too large, which easily leads to stamping burrs and dimensional deviations, and reduces the pass rate. The angle of a single cutting edge in the circumferential direction is 4 degrees to 105 degrees. The central angle α determines the range of influence of the cutting edge on the local magnetic permeability: the larger the angle, the wider the area covered by the cutting edge. α≤105° to avoid excessive occupation of the circumferential space of the yoke by the cut edge: if the angle is too large, the arc segment without cut edge will be too narrow, which will greatly increase the risk of yoke breakage; if the angle is too small, the cut edge structure will be too narrow, and the mold will be prone to chipping during processing.

[0048] To avoid defects such as flaking at the edge stamping position when setting the rivet part of the stator lamination 110, the stator lamination 110 is further provided with a rivet part for stacking connection. The outer periphery of the stator lamination 110 is also provided with a second cut edge 115 in the circumferential area corresponding to the rivet part. The maximum radial depth of the second cut edge 115 in the stator core 100 is H2, where H2 < 1.5 mm. The rivet part may cause local magnetic permeability abnormality due to stamping deformation. The second cut edge 115 compensates for magnetic field distortion by adjusting the outer periphery shape of this area, avoiding the concentration of electromagnetic force near the rivet part. H2 < 1.5 mm can prevent the second cut edge 115 from being too deep, which would weaken the connection strength of the rivet part. It also prevents the second cut edge 115 from being too deep, affecting the local magnetic field of the first cut edge 114, and also prevents the material at the root of the rivet part from being too thin, resulting in rivet breakage or deformation during stacking. This reduces the challenge to the stamping process (such as avoiding burrs and springback on the lamination edge) and ensures the forming accuracy of the rivet part.

[0049] Reference Figure 4 Specifically, n second cut edges 115 are distributed circumferentially along the outer periphery of the stator yoke 111. The central angle corresponding to a single second cut edge 115 is β, where 0≤n≤16 and 4°≤β≤31°. The angle β needs to match the circumferential dimension of the rivet part (e.g., when the central angle corresponding to the circumferential width of the rivet part is 2°-15°, β is usually taken as 4°-25° to ensure that the cut edge completely covers the rivet area).

[0050] In some designs that do not have a rivet, the second cut edge 115 may not exist.

[0051] Specifically, the radius of the stator lamination 110 is R, where R, α, β, S1, and S2 satisfy the following relationship: .

[0052] Among them, the central angle corresponding to a single first cutting edge 114 is α, the chord length of the first cutting edge 114 corresponding to the central angle α is L, L = 2R×sin(α / 2), that is, sin(α / 2)×2R is the chord length with a radius of R and a central angle of α. That is, the relevant parts in the numerator and denominator are the sum of multiple chord lengths corresponding to the corresponding angle α / β, which is used to constrain the parameter ratio relationship on the stator punching 110 to meet the design requirements of motor performance (such as magnetic flux, loss, mechanical strength).

[0053] Combined with Figure 9 , the following table shows the percentage change in performance of the "improved" electronic iron core relative to the "before improvement" (how much the three key performance indicators have improved relative to the original state), that is, the percentage increase of each performance indicator at different ratios.

[0054]

[0055] From the above table and Figure 9 , Figure 9 The vertical axis (Y-axis): represents the percentage increase (%) of the "improved" electronic iron core relative to the "before improvement", ranging from 0.00% to 1.20%. Figure 9 The horizontal axis (X-axis): is the parameter: The ratio range.

[0056] It can be seen that when the above parameter ratio is constrained within the range of 0.42 - 0.48, the three key performance indicators have good improvements relative to the original state. Among them, the overall efficiency of the machine is the comprehensive efficiency of the entire compressor system; the motor efficiency reflects the energy loss of the motor component in the compressor system; the oil discharge volume is the amount of lubricating oil carried away by the discharged high-pressure refrigerant gas during the operation of the compressor.

[0057] Referring to Figures 6 to 8 , further, the total area of all the first cutting edges 114 on any stator punching 110 is s1, the total area of all the second cutting edges 115 is s2, and 0.972 ≤ s1 / s2 ≤ 0.985.

[0058] For example, the area of a single first cutting edge 114 ≈ the radial depth of the cutting edge (H1) × the circumferential width of the cutting edge (related to the central angle α, width = R×α×π / 180, R is the radius of the punching); s1 = m×the area of a single first cutting edge 114 (m is the number of first cutting edges 114, 1 < m ≤ 16); the area of a single second cutting edge 115 ≈ the radial depth of the cutting edge (H2) × the circumferential width of the cutting edge (related to the central angle β, width = R×β×π / 180); s2 = n×the area of a single second cutting edge 115 (n is the number of second cutting edges 115, 0 ≤ n ≤ 16).

[0059] s1≈s2 ensures that the adjustment effect of the first cut edge 114 (distributed throughout the circumference) and the second cut edge 115 (distributed in the rivet area) on the magnetic field is balanced, avoiding electromagnetic force fluctuations caused by sudden changes in local magnetic permeability. Excessive difference in cut edge area can lead to stress concentration on the outer periphery of the lamination (e.g., if s1 is much larger than s2, too much material is removed from the area of ​​the first cut edge 114, resulting in decreased stiffness). Limiting the area to this range ensures electromagnetic balance while guaranteeing structural strength, vibration suppression, and manufacturing process stability.

[0060] Furthermore, the maximum yoke width of the stator yoke 111 in the radial direction of the stator core 100 is L1, and the minimum yoke width is L2, satisfying the relationship: 0≤L1-L2≤0.5mm.

[0061] Specifically, the first cut edge 114 is a non-concentric curved surface structure formed by material removal on the outer periphery of the stator yoke 111 or a groove structure opening towards the outer periphery, and it makes the outer circle of the stator core 100 have a non-circular outline.

[0062] Reference Figure 5 The maximum yoke width L1 is the thickest part of the stator yoke 111 in the radial direction (usually located in the arc segment between adjacent first cut edges 114, in areas without cut edges); the minimum yoke width L2 is the thinnest part of the stator yoke 111 in the radial direction (usually located at the bottom of the first cut edge 114, in the area where the most material is removed); the essence of the first cut edge 114 is to form a non-circular contour (such as an arc-shaped recess or a polygonal cut edge) by removing material from the outer periphery, with the purpose of adjusting the air gap magnetic field distribution and suppressing electromagnetic force harmonics. Material removal in the cut edge area will directly reduce the thickness of the yoke. If the design is not proper, L1-L2 can easily exceed 0.5mm, causing magnetic circuit and structural problems.

[0063] This invention also proposes an electric motor, which includes a stator core 100. The specific structure of the stator core 100 is as described in the above embodiments. Since this 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 elaborated here. The motor includes a rotor assembly and a stator assembly. The rotor assembly and the stator assembly are driven together, that is, through electromagnetic induction, the rotor rotates relative to the stator, thereby realizing the conversion of electrical energy into mechanical energy. After alternating current is applied to the windings of the stator assembly, a rotating magnetic field is generated; the rotor assembly (usually containing permanent magnets or induced current) is subjected to electromagnetic force (or electromagnetic torque) in the rotating magnetic field and rotates with the magnetic field, forming a "stator fixed, rotor rotating" cooperative relationship.

[0064] This invention also proposes a compressor comprising a housing and 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 possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. The motor housing is configured as the compressor housing. The compressor housing simultaneously serves to house the compression mechanism and fix the stator and rotor assemblies. It is connected to the compression mechanism via a motor, which provides power to the compression mechanism (e.g., by connecting a piston via a crankshaft or directly driving a scroll plate).

[0065] The present invention also proposes a refrigeration device, including the above-mentioned compressor, which is an air conditioner, a wall-mounted air conditioner indoor unit, a mini-fridge, a kitchen refrigerator, a vehicle refrigeration device, etc. using the above-mentioned compressor.

[0066] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A stator core, characterized in that, include: Multiple stator laminations are stacked together. Each stator lamination includes a stator yoke and multiple stator teeth located inside the stator yoke. A stator slot is defined between two adjacent stator teeth. Multiple first tangents are provided along the circumferential direction on the outer periphery of each stator lamination. The first tangents extend through the stator core axially, and the maximum radial depth of the first tangent in the stator lamination is H1, where H1 ≥ 1.5 mm. The total area of ​​the stator slots of the stator laminations is S1, and the total area of ​​the stator yoke and the stator teeth of the stator laminations is S2, satisfying the relationship: 0.39 ≤ S1 / S2 ≤ 0.

51. The stator lamination is provided with a rivet for stacking and connecting. The outer periphery of the stator lamination is also provided with a second cut edge in the circumferential area corresponding to the rivet. The maximum depth of the second cut edge in the radial direction of the stator core is H2, where H2 < 1.5 mm.

2. The stator core as described in claim 1, characterized in that, The first cutting edge is distributed in m circumferentially along the outer periphery of the stator yoke, and the central angle corresponding to a single first cutting edge is α, where: 1<m≤16, 4°≤α≤105°.

3. The stator core as described in claim 1, characterized in that, There are n second cutting edges distributed circumferentially on the outer periphery of the stator yoke, and the central angle corresponding to a single second cutting edge is β, where 0≤n≤16 and 4°≤β≤31°.

4. The stator core as described in claim 3, characterized in that, The radius of the stator lamination is R, where R, α, β, S1, and S2 satisfy the following relationship: 。 5. The stator core as described in any one of claims 1 to 3, characterized in that, The maximum yoke width of the stator yoke in the radial direction of the stator core is L1, and the minimum yoke width is L2, satisfying the relationship: 0≤L1-L2≤0.5mm.

6. The stator core as described in claim 1, characterized in that, The maximum diameter of the stator core is D, where 90mm ≤ D ≤ 200mm.

7. The stator core as described in claim 1, characterized in that, The first cut edge is a non-concentric curved surface structure or a groove structure opening towards the outer periphery of the stator yoke formed by material removal, and it makes the outer circle of the stator core have a non-circular outline.

8. An electric motor, characterized in that, Includes the stator core as described in any one of claims 1 to 7.

9. A compressor, characterized in that, Includes the motor as described in claim 8.

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