Stator assembly, motor and compressor

Abstract

The utility model provides a kind of stator assembly, motor and compressor, stator assembly includes: stator core, stator core is formed by the stacking of multiple stator lamination, stator core includes yoke and multiple stator teeth, yoke is annular structure, multiple stator teeth are sequentially and spacedly arranged on the inside of yoke along the circumference of yoke, and stator slot is formed between any two adjacent stator teeth;Multiple windings, winding is formed by enameled wire around stator tooth;Wherein, the structure of stator assembly satisfies:1.0mm≤L2≤2.0mm,0.35≤L6 / L2≤0.55, L2 is the slot width of stator slot, L6 is the diameter of enameled wire.The stator assembly of the utility model embodiment solves the technical problem of low motor efficiency in related art.

Description

Technical Field

[0001] This utility model relates to the field of motor design technology, and more specifically, to a stator assembly, a motor, and a compressor. Background Technology

[0002] Improving motor efficiency is an important area of ​​focus for motor designers. By increasing motor efficiency, many benefits can be achieved, such as energy saving and cost reduction, extending equipment life, reducing carbon emissions, and enhancing product competitiveness.

[0003] In related technologies, motor designers have made various improvements to the motor structure to increase motor efficiency. For example, they have used silicon steel sheets with higher permeability to reduce iron losses, used copper wire with higher purity to reduce copper losses, improved stator and rotor slot shapes, and reduced air gap magnetic reluctance, etc.

[0004] Although the aforementioned methods have been employed in related technologies to improve motor efficiency, the current improvement of motor efficiency still faces bottlenecks, with relatively low motor efficiency making it difficult to further enhance it. Utility Model Content

[0005] The main objective of this invention is to provide a stator assembly, a motor, and a compressor to solve the technical problem of low motor efficiency in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a stator assembly is provided, comprising: a stator core formed by stacking multiple stator laminations, the stator core including a yoke and multiple stator teeth, the yoke being annular in structure, the multiple stator teeth being sequentially and spaced apart along the circumference of the yoke on the inner side of the yoke, and a stator slot being formed between any two adjacent stator teeth; and multiple windings formed by winding enameled wire around the stator teeth; wherein the structure of the stator assembly satisfies: 1.0mm≤L2≤2.0mm, 0.35≤L6 / L2≤0.55, where L2 is the slot width of the stator slot and L6 is the diameter of the enameled wire.

[0007] Furthermore, the structure of the stator assembly satisfies: 5%≤S2 / (S1-S3)≤18%; where S1=π / Z*(D1^2-D2^2), S2=L2*(D1-D2), S3=L1*(D1-D2), Z is the number of stator slots, D1 is the minimum distance from the bottom of the stator slot to the center of the stator core, D2 is the radius of the inscribed circle of the stator core, and L1 is the width of the stator teeth.

[0008] Furthermore, the structure of the stator assembly satisfies: 2.5%≤S4 / (S1-S3)≤11.5%; where S1=π / Z*(D1^2-D2^2), S3=L1*(D1-D2), S4=L4*(D1-D2-L3), Z is the number of stator slots, D1 is the minimum distance from the bottom of the stator slot to the center of the stator core, D2 is the radius of the inscribed circle of the stator core, L1 is the width of the stator teeth, L3 is the depth of the stator slot opening along the radial direction of the stator core, and L4 is the minimum distance between two adjacent phase windings.

[0009] Furthermore, the cross-sectional shape of the bottom of the stator slot is a first arc-shaped structure, and the center of the circle containing the first arc-shaped structure coincides with the center of the stator core.

[0010] Furthermore, the cross-sectional shape of the inner end of the stator tooth is a second arc-shaped structure, and the center of the circle containing the second arc-shaped structure coincides with the center of the stator core.

[0011] Furthermore, the winding is formed by winding equipment, and the structure of the stator assembly satisfies: 0.7≤L5 / L2≤1.5; where L5 is the width of the winding needle of the winding equipment, and the winding needle is used to feed the enameled wire to the winding position.

[0012] Furthermore, the stator assembly also includes: multiple slot insulation structures, which are disposed one-to-one in multiple stator slots to separate the corresponding windings from the stator core through the slot insulation structures.

[0013] According to another aspect of the present invention, an electric motor is provided, the electric motor including a stator assembly and a rotor assembly, the rotor assembly being rotatably disposed within the stator assembly, wherein the stator assembly is the stator assembly described above.

[0014] Furthermore, the structure of the motor satisfies at least one of the following: the motor is a concentrated winding motor; the motor is a permanent magnet synchronous motor; the stator assembly windings are connected in a delta connection or a star connection.

[0015] According to another aspect of the present invention, a compressor is provided, which includes the aforementioned motor.

[0016] The stator assembly applying the technical solution of this utility model includes: a stator core, which is formed by stacking multiple stator laminations. The stator core includes a yoke and multiple stator teeth. The yoke has a ring structure, and the multiple stator teeth are arranged sequentially and spaced apart along the circumference of the yoke on the inner side of the yoke. A stator slot is formed between any two adjacent stator teeth; and multiple windings, which are formed by winding enameled wire around the stator teeth. The structure of the stator assembly satisfies: 1.0mm≤L2≤2.0mm, 0.35≤L6 / L2≤0.55, where L2 is the slot width of the stator slot, and L6 is the diameter of the enameled wire. In related technologies, the stator assembly typically uses a pin-type winding method during the winding of enameled wire. Because of the presence of a winding pin, and because the pin must pass through the stator slot during the winding and laying process, the slot opening must meet the width requirement for the winding pin to pass through. Otherwise, damage to the windings or equipment malfunctions may occur during the winding process. Specifically, the width of the winding needle is typically 1.2mm to 1.5mm wider than the outer diameter of the enameled wire. The slot width and the coil gap between two phases must also be greater than the width of the winding needle; otherwise, the winding needle cannot wind the wire. Therefore, the stator slots in related technologies are usually quite wide, generally 2.5mm to 3.5mm, and the ratio of the enameled wire diameter to the slot width is usually small. In this embodiment, a guided winding method can be used. Without the winding needle entering the stator slot, the enameled wire is guided into the stator slot for winding using grippers, hooks, or other guiding structures. Therefore, the slot opening does not need to be for the winding needle to pass through, its width can be smaller, and the ratio of the enameled wire diameter to the slot width can be larger. Specifically, in this embodiment, the slot width L2 of the stator slot is designed to be 1.0mm ≤ L2 ≤ 2.0mm, and the ratio of the enameled wire diameter to the slot width L6 / L2 is designed to be 0.35 ≤ L6 / L2 ≤ 0.55. Compared with stator assemblies in related technologies, the stator slot has a smaller opening, which helps to reduce the cogging torque of the motor, thereby reducing vibration during motor operation, reducing wasted power consumption, and improving motor efficiency, thus solving the technical problem of low motor efficiency in related technologies. Moreover, the reduction in cogging torque can reduce motor vibration and noise, and also helps to extend the service life and working accuracy of the motor. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of the stator assembly of this utility model (only the winding in one stator slot is shown in the figure). Figure 2This is a schematic diagram of the stator core structure of an embodiment of the stator assembly of this utility model (some structural parameters of the stator core are shown in the figure). Figure 3 This is a schematic diagram of the stator core structure of an embodiment of the stator assembly of this utility model (some structural parameters of the stator core are shown in the figure). Figure 4 This is a schematic diagram of a stator assembly in related technologies during the winding process. Figure 5 This is a schematic diagram of an embodiment of the stator assembly of this utility model during the winding process; Figure 6 A schematic diagram of the cogging torque of a motor using a stator assembly in the related art and a motor using a stator assembly according to an embodiment of the present invention; Figure 7 A schematic diagram comparing the motor efficiency of a motor using a stator assembly from the related art and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 1.0 mm). Figure 8 A schematic diagram comparing the motor efficiency of a motor using a stator assembly from the related art and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 1.5 mm). Figure 9 This is a schematic diagram comparing the motor efficiency of a motor using a stator assembly from the related art and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 2.0 mm).

[0018] The above figures include the following reference numerals: 1. Stator core; 11. Yoke; 12. Stator teeth; 13. Stator slots; 2. Windings; 3. Slot insulation structure; 10. Winding needle. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figures 1 to 9To address the technical problems described in the background section, this utility model provides a stator assembly comprising: a stator core 1 formed by stacking multiple stator laminations, the stator core 1 including a yoke 11 and multiple stator teeth 12, the yoke 11 being annular in structure, the multiple stator teeth 12 being sequentially and spaced along the circumference of the yoke 11 on the inner side of the yoke 11, and a stator slot 13 being formed between any two adjacent stator teeth 12; and multiple windings 2 formed by winding enameled wire around the stator teeth 12; wherein the structure of the stator assembly satisfies: 1.0mm≤L2≤2.0mm, 0.35≤L6 / L2≤0.55, where L2 is the slot width of the stator slot 13 and L6 is the diameter of the enameled wire.

[0021] In related technologies, stator assemblies typically employ a pin-type winding method during the winding of enameled wire. Because of the presence of the winding pin, and the fact that the pin must pass through the stator slot 13 during the winding and arrangement of the wire, the slot opening of the stator slot 13 must meet the width requirements for the winding pin to pass through. Otherwise, damage to the windings or equipment malfunctions may occur during the winding process. Specifically, the width of the winding pin is typically 1.2mm to 1.5mm wider than the outer diameter of the enameled wire, and the slot opening width and the coil gap between two phases must be greater than the width of the winding pin; otherwise, the winding pin cannot wind the wire. Therefore, the stator slot 13 in related technologies is typically quite wide, generally 2.5mm to 3.5mm, and the ratio of the enameled wire diameter to the slot opening width of the stator slot 13 is usually small. In this embodiment, a guided winding method can be adopted. Without the winding needle 10 entering the stator slot 13, the enameled wire is guided into the stator slot 13 by a clamping or hooking structure for winding. Therefore, the slot opening of the stator slot 13 does not need to be for the winding needle 10 to pass through, and its slot width can be made smaller, allowing for a larger ratio of enameled wire diameter to slot width. Specifically, in this embodiment, the slot opening width L2 of the stator slot 13 is designed to be 1.0mm ≤ L2 ≤ 2.0mm, and the ratio of enameled wire diameter to slot width L6 / L2 is designed to be 0.35 ≤ L6 / L2 ≤ 0.55. Compared with stator assemblies in related technologies, the smaller slot opening of the stator slot 13 helps reduce the cogging torque of the motor, thereby reducing vibration during motor operation, reducing wasted energy consumption, and improving motor efficiency, thus solving the technical problem of low motor efficiency in related technologies. Moreover, the reduction in cogging torque can reduce motor vibration and noise, and also helps extend the motor's service life and working accuracy.

[0022] In related technologies, the slot width ranges from 2.5mm to 3.5mm. Excessive width leads to increased cogging torque, unstable control, and worsened noise. Conversely, a slot width that is too small can cause squeezing and scratching of the enameled wire during winding, easily resulting in electrical malfunctions. In this embodiment, the slot width is designed to be L2 ≥ 1mm, which is 30% to 50% smaller than the conventional design. This avoids damage to the enameled wire, and the corresponding cogging torque is significantly reduced. In this embodiment, L6 / L2 is larger than conventional. Due to the more compact guided winding arrangement, the stator slot 13 has a larger utilization area within a reasonable wire diameter range, improving motor efficiency. Moreover, when the slot width of the stator slot 13 is smaller than the conventional design, if the enameled wire diameter is too large, it can easily be scratched during winding; if the wire diameter is too small, it can easily break during winding. A value of 0.35 ≤ L6 / L2 ≤ 0.55 effectively avoids these problems.

[0023] The above-mentioned guided winding method will be further explained here, such as... Figure 4 As shown, Figure 4 This diagram illustrates a stator assembly in related technologies during winding. In these technologies, the winding needle 10 needs to extend into the stator slot 13 through its opening to wind the wire. Therefore, the slot opening width needs to be relatively large. Since the size of the winding needle 10 is related to the diameter of the enameled wire, the ratio of the enameled wire diameter to the slot width, L6 / L2, is typically small. This stator assembly structure results in a large cogging torque in the motor, leading to significant vibration and noise, and affecting motor efficiency. Figure 5 As shown, Figure 5 This is a schematic diagram illustrating the winding process of an embodiment of the stator assembly of this utility model. In this embodiment, during winding, the winding needle 10 does not enter the stator slot 13. Instead, the wire is supplied from outside the stator slot 13, and the enameled wire is clamped or hooked by guide components such as grippers and hooks located at the upper and lower ends of the stator core 1, thus guiding the enameled wire into the stator slot 13 for winding. This eliminates the need for the winding needle 10 to enter the stator slot 13 through the slot opening, allowing the slot opening of the stator slot 13 to be smaller compared to related technologies, and resulting in a larger ratio of enameled wire diameter to slot width, L6 / L2. During the winding process, guided winding does not require the winding needle to enter between the coils, thus the gap between the slot opening and the coil can be very small, effectively improving slot fill factor and motor efficiency. During the winding process, the winding needle 10 moves up and down to transport the enameled wire. There are hooks or clamps at the upper and lower ends to guide the enameled wire. After the winding needle 10 completes one cycle of winding inside the stator, the upper and lower hooks or clamps guide the enameled wire into the stator slot 13 according to the program control to complete one turn of winding.

[0024] Please refer to Figure 3In this embodiment, the structure of the stator assembly satisfies: 5%≤S2 / (S1-S3)≤18%; where S1=π / Z*(D1^2-D2^2), S2=L2*(D1-D2), S3=L1*(D1-D2), Z is the number of stator slots 13, D1 is the minimum distance from the bottom of the stator slot 13 to the center of the stator core 1, D2 is the radius of the inscribed circle of the stator core 1, and L1 is the width of the stator teeth 12.

[0025] In this embodiment, the structural parameters of the stator assembly are further optimized to ensure that 5% ≤ S2 / (S1-S3) ≤ 18%. A smaller ratio results in higher utilization of the stator slots 13, allowing for the embedding of more enameled wire and improving motor efficiency. However, if this value is too small, the gap between the two-phase windings may be too small, potentially leading to electrical malfunctions. This embodiment, by designing S2 / (S1-S3) to 5% ≤ S2 / (S1-S3) ≤ 18%, effectively improves the utilization of the stator slots 13 while ensuring electrical reliability, thereby further enhancing motor efficiency.

[0026] In a preferred embodiment, the structure of the stator assembly satisfies: 2.5%≤S4 / (S1-S3)≤11.5%; where S1=π / Z*(D1^2-D2^2), S3=L1*(D1-D2), S4=L4*(D1-D2-L3), Z is the number of stator slots 13, D1 is the minimum distance from the bottom of the stator slot 13 to the center of the stator core 1, D2 is the radius of the inscribed circle of the stator core 1, L1 is the width of the stator teeth 12, L3 is the depth of the slot opening of the stator slot 13 along the radial direction of the stator core 1, and L4 is the minimum distance between two adjacent phase windings 2. Similar to the above, in the actual winding process, the coils cannot be arranged neatly, and some enameled wires may protrude. Considering this situation in the actual manufacturing process, this embodiment further restricts the minimum distance between two adjacent phase windings 2, so that S4 / (S1-S3) satisfies 2.5%≤S4 / (S1-S3)≤11.5%, thereby more directly restricting the gap between two adjacent phase windings and ensuring electrical reliability and motor efficiency.

[0027] In one specific embodiment, the cross-sectional shape of the bottom of the stator slot 13 is a first arc-shaped structure, and the center of the circle containing the first arc-shaped structure coincides with the center of the stator core 1. Further, the cross-sectional shape of the inner end of the stator tooth 12 is a second arc-shaped structure, and the center of the circle containing the second arc-shaped structure coincides with the center of the stator core 1. In this embodiment, all cross-sections are perpendicular to the axial direction of the stator assembly.

[0028] Specifically, winding 2 is formed by winding equipment, and the structure of the stator assembly satisfies: 0.7≤L5 / L2≤1.5; where L5 is the width of the winding needle 10 of the winding equipment, which is used to feed the enameled wire to the winding position. If L5 / L2 is too large, it will cause difficulties in grasping the enameled wire during the guiding process, adversely affecting the manufacturing process of the stator assembly; if L5 / L2 is too small, it will result in low strength of the winding needle 10 and an insufficiently small chamfer, posing a risk of scratching the enameled wire. In this embodiment, designing L5 / L2 to be 0.7≤L5 / L2≤1.5 effectively avoids the occurrence of the above two situations, which is beneficial to improving the winding quality of the stator assembly.

[0029] Specifically, the stator assembly also includes multiple slot insulation structures 3, which are correspondingly disposed in multiple stator slots 13 to separate the corresponding windings 2 from the stator core 1. By setting the slot insulation structures 3, the windings 2 and the stator core 1 can be isolated, thereby improving electrical insulation.

[0030] Secondly, embodiments of this utility model also provide an electric motor, which includes a stator assembly and a rotor assembly, wherein the rotor assembly is rotatably disposed within the stator assembly, and the stator assembly is the stator assembly described above.

[0031] In some optional embodiments, the motor structure satisfies at least one of the following: the motor is a concentrated winding motor; the motor is a permanent magnet synchronous motor; and the stator assembly winding 2 is connected in a delta or star configuration. The concentrated winding design has the advantage of short winding spans, with the winding coils wound on a single slot, resulting in short end winding lengths, smaller overall size, and easier processing. Due to the short end winding lengths, copper losses can be reduced by more than 30% compared to distributed winding stator assemblies. When used in equipment such as compressors where operating speeds are typically low to medium, the reduction in copper losses under low-to-medium speed conditions is significant, which can substantially improve motor energy efficiency.

[0032] In addition, embodiments of this utility model also provide a compressor, which includes the aforementioned motor.

[0033] like Figures 6 to 9 As shown, Figure 6 This diagram illustrates the cogging torque of a motor using a stator assembly from the related art and a motor using a stator assembly according to an embodiment of this invention. Figure 6In the diagram, the leftmost slot width of 3.0mm is a comparative scheme in related technologies, with a stator slot width of 3.0mm. The rightmost slot widths of 1.0mm, 1.5mm, and 2.0mm are schemes of this utility model embodiment. It can be seen that after reducing the slot width by using the guided winding method, the cogging torque of the motor is significantly reduced, which can reduce vibration and noise during motor operation.

[0034] Figure 7 A schematic diagram comparing the motor efficiency of a motor using a stator assembly from the related art and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 1.0 mm). Figure 8 A schematic diagram comparing the motor efficiency of a motor using a stator assembly from the related art and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 1.5 mm). Figure 9 This is a schematic diagram comparing the motor efficiency of a motor using a stator assembly from related technologies and a motor using a stator assembly from this embodiment of the invention (slot width L2 = 2.0 mm). Figures 7 to 9 In the diagram, the left side shows a comparative solution in related technologies, and the three groups on the right side are solutions of this utility model with L6 / L2 ratios of 0.35, 0.45, and 0.55, respectively. It can be seen that after optimizing the above structural parameters, the motor efficiency is further improved compared with the solutions in related technologies.

[0035] Furthermore, this utility model also provides a method for producing a stator assembly, applicable to the production of the aforementioned stator assembly. The method includes: during the winding of the winding 2, controlling the winding needle 10 to be located outside the stator slot 13 and supplying enameled wire into the stator slot 13; controlling a guiding structure to guide the enameled wire from the winding needle 10 so that the enameled wire is wound within the stator slot 13, wherein the guiding structure is located at at least one end of the stator core 1 along the axial direction of the stator assembly. This guided winding method eliminates the need for the winding needle 10 to enter the stator slot 13 through the slot opening, thus allowing the slot opening of the stator slot 13 to be smaller compared to related technologies, and resulting in a larger ratio of enameled wire diameter to slot width, L6 / L2. During the winding process, guided winding eliminates the need for the winding needle to enter between the coils, thus allowing for a very small gap between the slot opening and the coil, effectively improving slot fill factor and motor efficiency.

[0036] Specifically, the guiding structure can take many forms, as long as it can pull the enameled wire and move it into the stator slot 13 for winding. For example, the guiding structure includes a hook that can hook the enameled wire and pull it into the stator slot 13; or, the guiding structure includes a clamp that can clamp the enameled wire and pull it into the stator slot 13.

[0037] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: The stator assembly of this utility model embodiment includes: a stator core 1, which is formed by stacking multiple stator laminations. The stator core 1 includes a yoke 11 and multiple stator teeth 12. The yoke 11 has an annular structure. The multiple stator teeth 12 are arranged sequentially and spaced apart along the circumference of the yoke 11 on the inner side of the yoke 11. A stator slot 13 is formed between any two adjacent stator teeth 12. Multiple windings 2 are formed by winding enameled wire around the stator teeth 12. The structure of the stator assembly satisfies: 1.0mm≤L2≤2.0mm, 0.35≤L6 / L2≤0.55, where L2 is the slot width of the stator slot 13 and L6 is the diameter of the enameled wire. In related technologies, stator assemblies typically employ a pin-type winding method during the winding of enameled wire. Because of the presence of the winding pin, and the fact that the pin must pass through the stator slot 13 during the winding and arrangement of the wire, the slot opening of the stator slot 13 must meet the width requirements for the winding pin to pass through. Otherwise, damage to the windings or equipment malfunctions may occur during the winding process. Specifically, the width of the winding pin is typically 1.2mm to 1.5mm wider than the outer diameter of the enameled wire, and the slot opening width and the coil gap between two phases must be greater than the width of the winding pin; otherwise, the winding pin cannot wind the wire. Therefore, the stator slot 13 in related technologies is typically quite wide, generally 2.5mm to 3.5mm, and the ratio of the enameled wire diameter to the slot opening width of the stator slot 13 is usually small. In this embodiment, a guided winding method can be adopted. Without the winding needle 10 entering the stator slot 13, the enameled wire is guided into the stator slot 13 by a clamping or hooking structure for winding. Therefore, the slot opening of the stator slot 13 does not need to be for the winding needle 10 to pass through, and its slot width can be made smaller, allowing for a larger ratio of enameled wire diameter to slot width. Specifically, in this embodiment, the slot opening width L2 of the stator slot 13 is designed to be 1.0mm ≤ L2 ≤ 2.0mm, and the ratio of enameled wire diameter to slot width L6 / L2 is designed to be 0.35 ≤ L6 / L2 ≤ 0.55. Compared with stator assemblies in related technologies, the smaller slot opening of the stator slot 13 helps reduce the cogging torque of the motor, thereby reducing vibration during motor operation, reducing wasted energy consumption, and improving motor efficiency, thus solving the technical problem of low motor efficiency in related technologies. Moreover, the reduction in cogging torque can reduce motor vibration and noise, and also helps extend the motor's service life and working accuracy.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stator assembly, characterized in that, include: The stator core (1) is formed by stacking multiple stator laminations. The stator core (1) includes a yoke (11) and multiple stator teeth (12). The yoke (11) is a ring structure. The multiple stator teeth (12) are arranged sequentially and spaced apart on the inner side of the yoke (11) along the circumference of the yoke (11). A stator slot (13) is formed between any two adjacent stator teeth (12). Multiple windings (2), the windings (2) being formed by winding enameled wire around the stator teeth (12); The structure of the stator assembly satisfies: 1.0mm≤L2≤2.0mm, 0.35≤L6 / L2≤0.55, where L2 is the width of the stator slot (13) and L6 is the diameter of the enameled wire.

2. The stator assembly according to claim 1, characterized in that, The structure of the stator assembly satisfies: 5%≤S2 / (S1-S3)≤18%; Wherein, S1=π / Z*(D1^2-D2^2), S2=L2*(D1-D2), S3=L1*(D1-D2), Z is the number of stator slots (13), D1 is the minimum distance from the bottom of the stator slot (13) to the center of the stator core (1), D2 is the radius of the inscribed circle of the stator core (1), and L1 is the width of the stator tooth (12).

3. The stator assembly according to claim 1, characterized in that, The structure of the stator assembly satisfies: 2.5%≤S4 / (S1-S3)≤11.5%; Wherein, S1=π / Z*(D1^2-D2^2), S3=L1*(D1-D2), S4=L4*(D1-D2-L3), Z is the number of stator slots (13), D1 is the minimum distance from the bottom of the stator slot (13) to the center of the stator core (1), D2 is the radius of the inscribed circle of the stator core (1), L1 is the width of the stator tooth (12), L3 is the depth of the slot opening of the stator slot (13) along the radial direction of the stator core (1), and L4 is the minimum distance between two adjacent phase windings (2).

4. The stator assembly according to claim 2 or 3, characterized in that, The bottom cross-sectional shape of the stator slot (13) is a first arc-shaped structure, and the center of the circle containing the first arc-shaped structure coincides with the center of the stator core (1).

5. The stator assembly according to claim 2 or 3, characterized in that, The cross-sectional shape of the inner end of the stator tooth (12) is a second arc-shaped structure, and the center of the circle containing the second arc-shaped structure coincides with the center of the stator core (1).

6. The stator assembly according to any one of claims 1 to 3, characterized in that, The winding (2) is formed by winding equipment, and the structure of the stator assembly satisfies: 0.7≤L5 / L2≤1.5; Wherein, L5 is the width of the winding needle (10) of the winding device, and the winding needle (10) is used to feed the enameled wire to the winding position.

7. The stator assembly according to any one of claims 1 to 3, characterized in that, The stator assembly further includes: Multiple slot insulation structures (3) are arranged one-to-one in multiple stator slots (13) to separate the corresponding windings (2) from the stator cores (1) through the slot insulation structures (3).

8. An electric motor, characterized in that, The motor includes a stator assembly and a rotor assembly, wherein the rotor assembly is rotatably disposed within the stator assembly, and wherein the stator assembly is the stator assembly according to any one of claims 1 to 7.

9. The motor according to claim 8, characterized in that, The structure of the motor satisfies at least one of the following: The motor is a concentrated winding motor; The motor is a permanent magnet synchronous motor; The stator assembly winding (2) is connected in either a delta connection or a star connection.

10. A compressor, characterized in that, The compressor includes the motor as described in claim 8 or 9.

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