Punching sheet assembly, motor, compressor and air conditioning system

Abstract

The invention discloses a punching sheet assembly, a motor, a compressor and an air conditioning system, the punching sheet assembly comprises a stator punching sheet, the stator punching sheet is provided with a yoke part arranged in a surrounding manner, the peripheral wall of the yoke part is provided with a plurality of trimming grooves at intervals, and the sum of projection areas of the plurality of trimming grooves in the thickness direction is S1; the rotor punching sheet is arranged inside the stator punching sheet in the radial direction, the rotor punching sheet is provided with a plurality of through-flow holes which are arranged around the center of the rotor punching sheet at intervals, the sum of the projection areas of the plurality of through-flow holes in the thickness direction is S2, and S1 and S2 meet the condition that S1 / S2 is larger than 0.65 and smaller than 0.95. According to the punching sheet assembly, the sizes of the trimming grooves and the sizes of the through-flow holes are optimally designed, so that the structures of the stator punching sheet and the rotor punching sheet can reduce the operation energy consumption of a motor, the operation efficiency of the motor is improved, and efficient operation of the compressor is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric machines, and in particular to a lamination assembly, an electric machine, a compressor and an air conditioning system. BACKGROUND

[0002] In the related art, an electric machine is provided with a stator and a rotor, and the stator and the rotor are generally stacked by stator laminations and rotor laminations. The form of the stator laminations and the rotor laminations affects the working efficiency of the electric machine. In the prior art, the stator laminations are provided with a cutout groove structure for circulating cooling liquid, and the rotor laminations are provided with through-flow holes. How to set the shape and size of the cutout groove and the shape and size of the through-flow holes on the rotor laminations affects the working efficiency of the final electric machine. Therefore, how to set the form of the cutout groove on the rotor laminations and the form of the through-flow holes on the rotor laminations becomes a technical problem to be solved in the field. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a lamination assembly. The lamination assembly according to the present application optimizes the size of the cutout groove and the size of the through-flow hole, so that the structure of the stator laminations and the rotor laminations can reduce the energy consumption of the electric machine, improve the operating efficiency of the electric machine, and ensure the efficient operation of the compressor.

[0004] The present application further provides an electric machine having the above-mentioned lamination assembly.

[0005] The present application further provides a compressor having the above-mentioned electric machine.

[0006] The present application further provides an air conditioning system having the above-mentioned compressor.

[0007] The lamination assembly according to the present application comprises: a stator lamination, the stator lamination being provided with a yoke portion arranged around the stator lamination, a plurality of cutout grooves being arranged at intervals on the outer circumferential wall of the yoke portion, and the sum of the areas of the plurality of cutout grooves in the thickness direction being S1; and a rotor lamination, the rotor lamination being arranged radially inside the stator lamination, a plurality of through-flow holes being arranged at intervals around the center of the rotor lamination on the rotor lamination, and the sum of the areas of the plurality of through-flow holes in the thickness direction being S2, wherein the S1 and the S2 satisfy the condition: 0.65 < S1 / S2 < 0.95.

[0008] The lamination assembly according to the application comprises a stator lamination and a rotor lamination, the stator lamination is formed with a yoke portion, a plurality of undercut grooves are arranged on the outer peripheral wall of the yoke portion, by arranging a plurality of undercut grooves on the outer periphery of the yoke portion, lubricating oil flows into the gap between the stator lamination and the rotor through the undercut grooves, reducing friction, at the same time, the lubricating oil flows through the undercut grooves, which can take away heat, achieving heat dissipation of the motor, ensuring stable operation of the motor, the sum of the projection areas of the plurality of undercut grooves in the thickness direction is S1; the rotor lamination is provided with a plurality of through-flow holes arranged at intervals around the center of the rotor lamination, improving the stability of the motor, the sum of the projection areas of the plurality of through-flow holes in the thickness direction is S2, by designing S1 and S2 to satisfy 0.65 < S1 / S2 < 0.95, the structure of the stator lamination and the rotor lamination can effectively reduce the energy consumption of the motor, improve the operating efficiency of the motor, and ensure efficient operation of the compressor.

[0009] According to some embodiments of the application, the stator lamination is formed with tooth portions, the tooth portions protrude radially inward along the yoke portion and are arranged at intervals in the circumferential direction, two adjacent tooth portions and the yoke portion form a stator slot, and the yoke portion is formed with a slot bottom of the stator slot; wherein the end portion of each tooth portion is formed with tooth shoulders protruding on both sides in the width direction of the tooth portion, the slot opening of the stator slot is defined between two adjacent tooth shoulders, and the minimum distance between two adjacent tooth shoulders is W; the number of stator slots is Q, Q = 15, the distance between the surface of the tooth shoulder facing the rotor lamination and the slot bottom is L, and satisfies: 2.6 < Q*(W*L) / S1 < 3.5.

[0010] According to some embodiments of the application, 2.3mm ≤ W ≤ 3.6mm.

[0011] According to some embodiments of the application, the radius of the stator lamination is R, and satisfies: 42.5mm ≤ R ≤ 56mm.

[0012] According to some embodiments of the application, the rotor lamination is formed with a plurality of permanent magnet slots arranged at intervals in the circumferential direction, and each permanent magnet slot is provided with a permanent magnet.

[0013] According to some embodiments of the application, the permanent magnet slot can be configured as a V-shaped slot, a U-shaped slot, a W-shaped slot, a straight slot or an I-shaped slot.

[0014] The motor according to another aspect of the application is briefly described below.

[0015] The motor according to the present application comprises a shell, a stator and a rotor, the stator and the rotor are stacked by a lamination assembly and are accommodated in the shell, the lamination assembly is configured as the lamination assembly in any one of the above embodiments, wherein the stator is fixed in the shell, the shell stably supports the stator, the rotor is accommodated in the stator, the rotor and the stator are matched with each other so that the rotor can rotate relative to the stator, thereby realizing the conversion of electric energy to mechanical energy, the stator and the rotor in the motor according to the present application are stacked by the lamination assembly in any one of the above embodiments, the lamination assembly is optimized and designed, so that the loss of the motor according to the present application during operation is smaller, and the motor operation efficiency is higher.

[0016] The compressor according to another aspect of the present application is briefly described below.

[0017] The compressor according to the present application has the motor in any one of the above embodiments, and therefore, the compressor according to the present application has higher efficiency due to the higher efficiency of the motor, and the compressor operates stably.

[0018] The air conditioning system according to another aspect of the present application is briefly described below.

[0019] The air conditioning system according to the present application has the compressor in the above embodiments, and therefore, the air conditioning system according to the present application has better refrigeration effect and lower energy consumption due to the higher efficiency of the compressor.

[0020] Additional aspects and advantages of the present application will be described in the following description, become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a structural schematic diagram of a lamination assembly according to an embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of a lamination assembly according to an embodiment of the present application;

[0024] Figure 3 is an energy efficiency comparison diagram of a lamination assembly according to an embodiment of the present application and a conventional structure at the same speed;

[0025] Figure 4 is an energy efficiency comparison diagram of a lamination assembly according to an embodiment of the present application and a conventional structure at another same speed.

[0026] Reference signs:

[0027] The punched sheet assembly 1;

[0028] The stator punched sheet 11, the yoke part 111, the undercut slot 1111, the tooth part 112, the tooth shoulder 1121, the stator slot 113;

[0029] The rotor punched sheet 12, the through-flow hole 121, the permanent magnet slot 122. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explanation of the present application, and are not to be understood as limiting the present application.

[0031] In the related art, a motor is provided with a stator and a rotor, and the stator and the rotor are generally stacked by stator punched sheets and rotor punched sheets, and the form of the stator punched sheets and the rotor punched sheets affects the working efficiency of the motor. In the prior art, the stator punched sheets are provided with an undercut slot structure for circulating cooling liquid, and the rotor punched sheets are provided with a through-flow hole, and how to set the shape and size of the undercut slot and the shape and size of the through-flow hole on the rotor punched sheet will affect the working efficiency of the final motor. Therefore, the form of the undercut slot on the rotor punched sheet and the setting form of the through-flow hole on the rotor become technical problems to be solved in the field.

[0032] Reference is made below to Figures 1-4 The punched sheet assembly according to an embodiment of the present application is described.

[0033] The punched sheet assembly 1 according to the present application comprises a stator punched sheet 11 and a rotor punched sheet 12. The stator punched sheet 11 is provided with a yoke part 111 arranged around the stator punched sheet 11, and a plurality of undercut slots 1111 are arranged at intervals on the outer circumferential wall of the yoke part 111. The sum of the areas of the plurality of undercut slots 1111 in the thickness direction is S1. The rotor punched sheet 12 is arranged radially inside the stator punched sheet 11, and a plurality of through-flow holes 121 are arranged at intervals around the center of the rotor punched sheet 12. The sum of the areas of the plurality of through-flow holes 121 in the thickness direction is S2. S1 and S2 satisfy the condition: 0.65 < S1 / S2 < 0.95.

[0034] As Figure 1 and Figure 2As shown, the yoke part 111 is formed on the stator lamination 11, and a plurality of cut-edge grooves 1111 are arranged at the outer peripheral wall of the yoke part 111. When the stator lamination 11 is assembled, the yoke part 111 between two adjacent cut-edge grooves 1111 is matched with the motor component to ensure the stable installation of the stator lamination 11. The plurality of cut-edge grooves 1111 arranged on the outer peripheral wall of the yoke part 111 are matched with the motor component. When the motor is running, the lubricating oil can flow into the gap between the stator lamination 11 and the rotor through the cut-edge grooves 1111 to form a lubricating film, thereby reducing the friction and wear between the stator lamination 11 and the rotor. At the same time, the cut-edge grooves 1111 can also enhance the heat dissipation performance of the motor. Since the lubricating oil can take away the heat inside the motor during the flow process, the lubricating oil flowing in through the cut-edge grooves 1111 can effectively reduce the temperature inside the motor, thereby ensuring the stable performance of the motor during long-time operation. By reasonably designing the shape, number and position of the cut-edge grooves 1111, the magnetic flux distribution of the motor can be adjusted, thereby optimizing the electromagnetic performance of the motor, which is helpful to improve the overall operation efficiency and performance of the motor. In the scheme of the present application, the sum of the areas of the projections of the plurality of cut-edge grooves 1111 in the thickness direction is designed as S1. The areas of the projections of the plurality of cut-edge grooves 1111 in the thickness direction can be the same or different. S1 is the total sum of the areas of the projections of the plurality of cut-edge grooves 1111 in the thickness direction. For example, the areas of the projections of the plurality of cut-edge grooves 1111 in the thickness direction are S11, S12, S13, …, and S1=S11+S12+S13+….

[0035] The rotor lamination 12 is arranged radially inside the stator lamination 11. A plurality of flow-through holes 121 are arranged at the center of the rotor lamination 12. Since the rotor lamination 12 is an important component of the motor, its quality has a great influence on the performance of the motor. By arranging a plurality of flow-through holes 121 on the rotor lamination 12, the use of the material of the rotor lamination 12 can be significantly reduced, thereby reducing the weight of the rotor lamination 12 and further improving the working efficiency and stability of the motor. In addition, during the long-time operation of the motor, the rotor lamination 12 is easily affected by fatigue damage and thermal damage, thereby shortening the service life of the motor. The design of the flow-through holes 121 can reduce the stress concentration of the rotor lamination 12 and relieve the stress condition, thereby improving the strength and durability of the rotor lamination 12. In addition, the flow-through holes 121 can also help to improve the operation efficiency and stability of the motor. By reasonably designing the shape and number of the rotor lamination 12 in combination with the layout of the flow-through holes 121, the rotor inertia of the motor can be reduced, and the dynamic response speed and torque density of the motor can be improved. This makes the motor more quickly respond to the control signal during the processes of starting, accelerating and decelerating, and realizes more stable and efficient operation.

[0036] In the scheme of the present application, the sum of the projection areas of the plurality of through-flow holes 121 in the thickness direction is designed as S2, and the sum of the projection areas of the plurality of cut-edge grooves 1111 in the thickness direction S1 and the sum of the projection areas of the plurality of through-flow holes 121 in the thickness direction S2 satisfy the relationship: 0.65 < S1 / S2 < 0.95. Through testing, it is found that by optimizing the design of the sum of the projection areas of the plurality of cut-edge grooves 1111 in the thickness direction S1 and the sum of the projection areas of the plurality of through-flow holes 121 in the thickness direction S2, the value of S1 / S2 is within the preset range, thereby reducing the operating energy consumption of the motor, improving the operating efficiency of the motor, and improving the operating efficiency of the compressor.

[0037] The punched sheet assembly 1 according to the present application comprises a stator punched sheet 11 and a rotor punched sheet 12, the stator punched sheet 11 is formed with a yoke portion 111, a plurality of cut-edge grooves 1111 are arranged on the outer peripheral wall of the yoke portion 111. By arranging a plurality of cut-edge grooves 1111 on the outer periphery of the yoke portion 111, the lubricating oil flows into the gap between the stator punched sheet 11 and the rotor through the cut-edge grooves 1111, reducing the friction between the stator punched sheet 11 and the rotor. At the same time, the lubricating oil flows through the cut-edge grooves 1111, which can carry away heat, achieve heat dissipation of the motor, ensure stable operation of the motor, the sum of the projection areas of the plurality of cut-edge grooves 1111 in the thickness direction is S1; the rotor punched sheet 12 is provided with a plurality of through-flow holes 121 arranged around the center of the rotor punched sheet 12, which improves the operating stability of the motor, the sum of the projection areas of the plurality of through-flow holes 121 in the thickness direction is S2. By designing S1 and S2 to satisfy 0.65 < S1 / S2 < 0.95, the structure of the stator punched sheet 11 and the rotor punched sheet 12 can effectively reduce the operating energy consumption of the motor, improve the operating efficiency of the motor, and ensure efficient operation of the compressor.

[0038] As shown in Figure 3 and Figure 4 , the vertical coordinate in the figure is the output power of the motor at the corresponding speed. The scheme of the present application optimizes the design of the sum of the areas S1 of the cut-edge grooves 1111 on the outer periphery of the stator punched sheet 11 and the sum of the areas S2 of the through-flow holes 121 on the rotor punched sheet 12, and satisfies 0.65 < S1 / S2 < 0.95, so that the output power of the punched sheet assembly 1 of the present application at the same speed is higher than that of the punched sheet assembly with the conventional structure.

[0039] According to some embodiments of the present application, the stator sheet 11 is provided with tooth portions 112 which protrude radially inward along the yoke portion 111 and are arranged at intervals in the circumferential direction, and the stator slots 113 are formed between adjacent two tooth portions 112 and the yoke portion 111, and the yoke portion 111 is provided with a slot bottom of the stator slot 113; wherein the end portion of each tooth portion 112 is provided with tooth shoulders 1121 which protrude on both sides in the width direction of the tooth portion 112, and the slot opening of the stator slot 113 is defined between adjacent two tooth shoulders 1121, and the minimum distance between adjacent two tooth shoulders 1121 is W; the number of the stator slots 113 is Q, Q = 15, and the distance between the surface of the tooth shoulder 1121 facing the rotor sheet 12 and the slot bottom is L, and it satisfies: 2.6 < Q*(W*L) / S1 < 3.5.

[0040] As shown in Figure 1 and Figure 2 the stator sheet 11 is provided with tooth portions 112 which protrude radially inward along the yoke portion 111 and are arranged at intervals in the circumferential direction, and the stator slots 113 are formed between adjacent two tooth portions 112, and the winding is accommodated in the stator slot 113, and during the operation of the motor, the current passes through the stator winding to generate a magnetic field, and this magnetic field interacts with the rotor magnetic field to drive the rotor to rotate, and the tooth portion 112 of the stator sheet 11 is an important component of this magnetic circuit, and the tooth portion 112 determines the distribution and strength of the magnetic field, and by optimizing the tooth portion 112 and the stator slot 113, the efficiency of the motor can be effectively improved, wherein the slot opening width of the stator slot 113 directly affects the electromagnetic performance and operating efficiency of the motor, and in the scheme of the present application, the slot opening of the stator slot 113 is defined between the tooth shoulders 1121 of adjacent two tooth portions 112, and the distance between adjacent tooth shoulders 1121 gradually decreases in the extension direction toward the slot bottom, which helps to reduce the magnetic resistance and improve the magnetic flux density, wherein the minimum distance between adjacent two tooth shoulders 1121 is W, the distance between the surface of the tooth shoulder 1121 facing the rotor sheet 12 and the slot bottom is L, the number of the stator slots 113 is Q, Q = 15, and it satisfies: 2.6 < Q*(W*L) / S1 < 3.5, and through the above setting, the slot fill rate of the stator slot 113 can be effectively improved, the operating loss of the motor can be reduced, and the operating efficiency of the motor can be improved.

[0041] In the embodiments of the present application, the number of the stator slots 113 Q = 15, and the motor is designed as a 15-slot 10-pole structure, and such a motor design can provide higher power density and is suitable for high-speed use scenarios, and the scheme of the present application optimizes the design of the stator sheet 11 and the rotor sheet 12 in the 15-slot 10-pole motor, which can maximize the energy efficiency of the motor and thus improve the energy efficiency of the compressor.

[0042] According to some embodiments of the present application, 2.3mm ≤ W ≤ 3.6mm.

[0043] Specifically, the slot opening width of the stator slot 113 directly affects the electromagnetic performance and efficiency of the motor, and in the scheme of the present application, the slot opening of the stator slot 113 is defined between the two adjacent tooth shoulders 1121, and the minimum distance W between the two adjacent tooth shoulders 1121 satisfies 2.3mm≤W≤3.6mm, which helps to reduce the magnetic resistance, increase the magnetic flux density, and make the motor generate greater torque under the same current, thereby improving the motor efficiency.

[0044] According to some embodiments of the present application, the radius of the stator lamination 11 is R, and satisfies: 42.5mm≤R≤56mm.

[0045] Specifically, the radius of the stator lamination 11 affects the size and position distribution of the tooth portion 112 and the stator slot 113, and appropriate size design can optimize the distribution of magnetic flux and current, thereby reducing the loss in the motor, and the scheme of the present application reduces the loss of the motor in operation by designing the radius R of the stator lamination 11 to satisfy 42.5mm≤R≤56mm, thereby improving the motor efficiency, and at the same time, ensuring that the stator lamination 11 has a larger heat dissipation area, which is conducive to the dissipation of heat inside the motor and improves the heat dissipation performance of the motor, thereby ensuring stable operation of the motor.

[0046] According to some embodiments of the present application, the rotor lamination 12 is formed with a plurality of permanent magnet grooves 122 arranged at intervals in the circumferential direction, and each permanent magnet groove 122 is provided with a permanent magnet.

[0047] As shown in Figure 1 and Figure 2 , a plurality of permanent magnet grooves 122 are formed on the rotor lamination 12 and arranged at intervals in the circumferential direction, and each permanent magnet groove 122 is adapted to accommodate a permanent magnet, and the plurality of permanent magnet grooves 122 are uniformly arranged in the circumferential direction, so that the magnetic field generated by the permanent magnet is more uniform, thereby improving the efficiency and performance of the motor, wherein in the scheme of the present application, the number of permanent magnet grooves 122 is 10, and the motor is configured as a 15-slot 10-pole structure, which can provide higher power density and generate more power under the same volume or weight, and at the same time, through the optimized design of the motor, the motor efficiency can be maximized.

[0048] According to some embodiments of the present application, the permanent magnet groove 122 can be configured as a V-shaped groove, a U-shaped groove, a W-shaped groove, a straight groove or an I-shaped groove.

[0049] As shown in Figure 1 and Figure 2As shown, in the embodiments of the present application, the permanent magnet slot 122 is configured as a one-letter slot, which is conducive to forming a more uniform magnetic field distribution and ensuring stable operation of the motor. The configuration of the one-letter slot is relatively simple, which is conducive to reducing the manufacturing cost of the motor. At the same time, this design is also convenient for automatic production, improving production efficiency and product quality. Of course, the permanent magnet slot 122 can also be configured as a V-shaped slot, a U-shaped slot, a W-shaped slot or an I-shaped slot, etc. Different slot shapes of the permanent magnet slot 122 can optimize the uniformity and concentration of the magnetic field, thereby improving the performance and efficiency of the motor. The slot shape of the permanent magnet slot 122 can be selected and optimized according to the specific requirements and performance requirements of the motor.

[0050] The motor according to the present application is briefly described below.

[0051] The motor according to the present application comprises a housing, a stator and a rotor, the stator and the rotor are stacked by the lamination assembly 1 and are accommodated in the housing, and the lamination assembly 1 is configured as the lamination assembly 1 described in any one of the above embodiments. Among them, the stator is fixed inside the housing, and the housing stably supports the stator. The rotor is accommodated inside the stator, and the rotor and the stator cooperate with each other so that the rotor can rotate relative to the stator, thereby realizing the conversion of electric energy to mechanical energy. The stator and the rotor in the motor of the present application are stacked by the lamination assembly 1 described in any one of the above embodiments. Through the optimized design of the lamination assembly 1, the loss of the motor of the present application during operation is smaller, and the energy efficiency of the motor during operation is higher.

[0052] According to some embodiments of the present application, a plurality of stator slots 113 are formed on the stator and are arranged at a circumferential interval, and windings are accommodated in the stator slots 113.

[0053] Specifically, a plurality of stator slots 113 are formed on the stator, windings are accommodated in the stator slots 113, the stator is composed of a plurality of stator laminations 11, and the rotor is composed of a plurality of rotor laminations 12. The windings generate a rotating magnetic field after being energized, thereby driving the rotor to rotate. The stator and the rotor in the motor of the present application are stacked by the lamination assembly 1 described in any one of the above embodiments, so that the energy efficiency of the motor is higher, and the motor operates more stably.

[0054] The compressor according to the present application is briefly described below.

[0055] The compressor according to the present application has the motor described in any one of the above embodiments. Since the compressor according to the present application has the motor described in any one of the above embodiments, the energy efficiency of the motor is higher, the energy efficiency of the compressor according to the present application is higher, and the compressor operates stably.

[0056] The air conditioning system according to the present application is briefly described below.

[0057] The air conditioning system according to the present application has the compressor described in the above embodiment, and therefore, the air conditioning system according to the present application has higher energy efficiency of the compressor, better refrigeration effect, and lower energy consumption.

[0058] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In the description of the present application, “first feature” and “second feature” can include one or more of the features.

[0060] In the description of the present application, “a plurality of” means two or more.

[0061] In the description of the present application, “above” or “below” of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0062] In the description of the present application, “above”, “over” and “on” of a first feature to a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0063] In the description of the present application, the description referring to the terms “one embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example” or “some examples” and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A lamination assembly, characterized in that, include: A stator lamination, wherein a yoke is formed on the stator lamination, and a plurality of cutting grooves are provided at intervals on the outer peripheral wall of the yoke, and the sum of the areas of the plurality of cutting grooves projected in the thickness direction is S1; The rotor lamination is disposed radially inside the stator lamination. The rotor lamination has a plurality of flow holes spaced apart around the center of the rotor lamination. The sum of the areas of the plurality of flow holes projected in the thickness direction is S2. S1 and S2 satisfy: 0.65 < S1 / S2 < 0.

95.

2. The lamination assembly according to claim 1, characterized in that, The stator lamination has teeth formed thereon, the teeth protruding radially inward along the yoke and spaced circumferentially, and a stator groove is formed between two adjacent teeth and the yoke, and the bottom of the stator groove is formed on the yoke. Each tooth has a shoulder protruding on both sides in the width direction of the tooth, and the slot of the stator slot is defined between two adjacent shoulders. The minimum distance between two adjacent shoulders is W. The number of stator slots is Q, Q = 15. The distance between the surface of the shoulder facing the rotor lamination and the bottom of the slot is L, and satisfies: 2.6 < Q*(W*L) / S1 < 3.

5.

3. The lamination assembly according to claim 2, characterized in that, 2.3mm≤W≤3.6mm.

4. The lamination assembly according to claim 1, characterized in that, The radius of the stator lamination is R, and it satisfies: 42.5mm≤R≤56mm.

5. The lamination assembly according to claim 1, characterized in that, The rotor lamination has multiple permanent magnet slots spaced circumferentially, and each permanent magnet slot is provided with a permanent magnet.

6. The lamination assembly according to claim 5, characterized in that, The permanent magnet groove can be constructed as a V-shaped groove, U-shaped groove, W-shaped groove, straight groove or I-shaped groove.

7. An electric motor, characterized in that, include: case; A stator and a rotor, wherein the stator and the rotor are formed by stacking lamination assemblies and housed within the housing, the lamination assemblies being constructed as described in any one of claims 1-6.

8. The motor according to claim 7, characterized in that, The stator has a plurality of stator slots spaced circumferentially, and the stator slots accommodate windings.

9. A compressor, characterized in that, The motor included in any one of claims 7-8.

10. An air conditioning system, characterized in that, Includes the compressor as described in claim 9.

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