Motor, compressor and air conditioning system

Abstract

The utility model provides a motor, a compressor and an air conditioning system. The motor comprises a rotor; the stator is located on the circumferential side of the rotor and comprises a plurality of first tooth parts and a plurality of second tooth parts, the first tooth parts and the second tooth parts are alternately arranged in the circumferential direction of the stator, the width of the first tooth parts is W1, the width of the second tooth parts is W2 in the circumferential direction of the stator, and W2 is smaller than W1; the minimum distance between the side, facing the rotor, of the first tooth part and the outer side wall of the rotor is d1, the distance between the side, facing the rotor, of the second tooth part and the outer side wall of the rotor is d2, and d1 is smaller than d2; and the winding is wound on the first tooth part. According to the motor provided by the utility model, the distance between the first tooth part and the rotor is different from the distance between the second tooth part and the rotor, so that the air gap between the stator and the rotor can be adjusted according to the arrangement of the second tooth part, the air gap flux density harmonic wave can be optimized, the torque can be improved, the performance of the motor can be improved, the noise can be reduced, and the efficiency of the motor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor, a compressor and an air-conditioning system. Background Art

[0002] At present, with the rapid development of economy and the improvement of people's living standards, miniaturization, high efficiency and low noise are increasingly becoming people's demands in the field of compressors. The air gap magnetic flux harmonics of the motor in the related technology cause the vibration of the motor to be larger and the energy efficiency of the whole machine is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] To this end, a first aspect of the utility model provides a motor.

[0005] The second aspect of the utility model also provides a compressor.

[0006] The third aspect of the utility model also provides an air conditioning system.

[0007] In view of this, the first aspect of the utility model proposes a motor, comprising: a rotor; a stator, located on the circumferential side of the rotor, the stator comprising a plurality of first tooth portions and a plurality of second tooth portions, the plurality of first tooth portions and the plurality of second tooth portions being alternately arranged along the circumferential direction of the stator; along the circumferential direction of the stator, the width of the first tooth portion is W1, the width of the second tooth portion is W2, and W2 is smaller than W1; the minimum distance between the side of the first tooth portion facing the rotor and the outer side wall of the rotor is d1, the distance between the side of the second tooth portion facing the rotor and the outer side wall of the rotor is d2, and d1 is smaller than d2; wound around the first tooth portion.

[0008] The motor provided by the utility model comprises a rotor, a stator and a winding wound on the stator. The stator is located on the circumferential side of the rotor, and the stator comprises a plurality of first teeth and a plurality of second teeth, and the plurality of first teeth and the plurality of second teeth are staggered along the circumferential direction of the stator. The winding is wound on the first teeth, and when the winding is energized, the rotor can be driven to rotate to achieve power output. Among them, the width W2 of the second teeth is smaller than the width W1 of the first teeth, and the winding area of ​​the winding can be ensured while optimizing the air gap magnetic flux harmonics, thereby ensuring the motor performance. The minimum distance d1 between the side of the first teeth facing the rotor and the outer side wall of the rotor is smaller than the distance d2 between the side of the second teeth facing the rotor and the outer side wall of the rotor, that is, the spacing between the first teeth and the rotor is different from the spacing between the second teeth and the rotor, and then according to the setting of the second teeth, the air gap between the stator and the rotor can be adjusted, the air gap magnetic flux harmonics can be optimized, the torque can be improved, and the performance of the motor can be improved, the noise can be reduced, and the efficiency of the motor can be improved.

[0009] The motor provided by the utility model may also have the following additional technical features:

[0010] In some technical schemes, optionally, adjacent first tooth portions and second tooth portions enclose stator slots, and the number of stator slots is N; the diameter of the stator side facing away from the rotor is D1, the thickness of the stator along the axial direction of the stator is L1, and the number of pole pairs of the rotor is P; d1, d2, N, L1, P and D1 satisfy the following formula: 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4; wherein LCM(N,P) represents the least common multiple of N and P.

[0011] In this technical solution, along the radial direction of the stator, the distance d1 between the first tooth portion and the outer wall of the rotor, the distance d2 between the second tooth portion and the outer wall of the rotor, the number N of stator slots, the outer diameter D1 of the stator, the axial thickness L1 of the stator and the number of pole pairs P of the rotor satisfy: 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4, so that the distance between the second tooth portion and the outer wall of the rotor is within a reasonable range, thereby modulating the air gap magnetic flux harmonics and improving the performance of the motor.

[0012] In some technical solutions, optionally, W1 and W2 satisfy the following formula: 0.25≤W2 / W1≤0.5.

[0013] In this technical solution, if the width of the second tooth portion is too small, it will be difficult to process and manufacture, and will affect the strength of the second tooth portion. If the width of the second tooth portion is too large, it will affect the area of ​​the winding. Therefore, the ratio of the width W2 of the second tooth portion to the width W1 of the first tooth portion is designed to be between 0.25 and 0.5, which can ensure both the strength of the second tooth portion and the winding area of ​​the winding, thereby ensuring the magnetic field strength generated by the stator.

[0014] In some technical schemes, optionally, multiple first tooth portions and multiple second tooth portions are evenly distributed along the circumference of the stator; or on a cross section perpendicular to the axis of the stator, the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A1, and the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A2, and A1 is less than or equal to A2.

[0015] In this technical solution, multiple first tooth portions and multiple second tooth portions are evenly distributed along the circumference of the stator to ensure the performance of the motor. Or on a cross section perpendicular to the axis of the stator, the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A1, and the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A2, and A1 is less than or equal to A2, so that among the multiple first tooth portions and the multiple second tooth portions, at least two tooth portions have different spans along the circumference of the stator. That is, the multiple first tooth portions and the multiple second tooth portions can also be unevenly distributed along the circumference of the stator, which improves the flexibility of stator manufacturing.

[0016] In some technical solutions, optionally, when the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A1, and the angle between at least one first tooth portion and an adjacent second tooth portion relative to the axis of the stator is A2, 0.9≤A1 / A2≤1.

[0017] In this technical solution, when at least one of the plurality of first tooth portions and the plurality of second tooth portions is unevenly distributed, the angle change caused by the uneven distribution is controlled within a smaller range, so that the size of the stator slot is controlled within a reasonable range, the uniformity of the winding is ensured, and the magnetic field is made more uniform, thereby ensuring the performance of the motor. Specifically, 0.9≤A1 / A2≤1 ensures the uniformity of the winding and the performance of the motor.

[0018] In some technical solutions, optionally, the inner diameter of the stator is D2, and D2 and D1 satisfy the following formula: 0.51≤D2 / D1≤0.65.

[0019] In this technical solution, the diameter of the area enclosed by the first tooth portion toward one end of the rotor is D2. If the ratio of D2 to D1 is too large, the cost will increase, and if the ratio is too small, the inertia of the rotor will be affected. Therefore, the ratio of D2 to D1 is designed to be between 0.51 and 0.65, which can not only ensure the torque and inertia of the rotor and improve the performance of the motor, but also reduce the cost of the motor.

[0020] In some technical solutions, optionally, a side of the first tooth portion facing the rotor includes a chamfered surface, and the chamfered surface is concave or inclined from the side of the first tooth portion facing the rotor toward a direction away from the rotor.

[0021] In this technical solution, the wall surface of one side of the first tooth portion facing the rotor includes a chamfered surface, which is concave or inclined in the direction away from the rotor, that is, a portion of the first tooth portion at one end facing the rotor is cut off to reduce the content of the air gap magnetic density, reduce the electromagnetic excitation force generated by the air gap harmonic magnetic density, thereby reducing the torque pulsation, and then reduce the vibration noise of the motor and improve the motor efficiency.

[0022] In some technical solutions, optionally, the curved surface includes a curved surface or a flat surface.

[0023] In this technical solution, the curved surface can be a curved surface or a flat surface.

[0024] In some technical solutions, optionally, the rotor includes: a rotor core and a plurality of permanent magnets; the rotor core is provided with a plurality of mounting grooves, the plurality of permanent magnets are arranged in the mounting grooves, or the permanent magnets are attached to the surface of the rotor.

[0025] In this technical solution, the rotor includes a rotor core and a plurality of permanent magnets, and the plurality of permanent magnets can be arranged in the mounting grooves of the rotor core to ensure the connection strength between the permanent magnets and the rotor core. They can also be attached to the surface of the rotor to reduce the difficulty of processing.

[0026] In some technical schemes, optionally, when the rotor core is provided with a plurality of mounting grooves, the plurality of mounting grooves radiate from the center of the rotor core to the outer wall of the rotor core; or the plurality of mounting grooves are distributed along the circumference of the rotor, any mounting groove is V-shaped, and the V-shaped mounting groove is arranged away from the axis of the rotor core.

[0027] In this technical solution, when the rotor core is provided with mounting grooves, the plurality of mounting grooves are radial, and the arrangement of the plurality of permanent magnets is also radiating from the center of the rotor core to the outer wall; the plurality of mounting grooves are distributed along the circumference of the rotor core, and any mounting groove is V-shaped, so that the permanent magnet is arranged in a V-shape in the mounting groove, which is beneficial to reduce the vibration and deformation of the motor.

[0028] According to a second aspect of the utility model, a compressor is also proposed, comprising: a motor as proposed in any of the above technical solutions.

[0029] The compressor provided in the second aspect of the utility model comprises the motor proposed in any of the above technical solutions and therefore has all the beneficial effects of the motor.

[0030] According to a third aspect of the present utility model, an air conditioning system is also proposed, comprising: a motor or a compressor as proposed in any of the above technical solutions.

[0031] The air conditioning system provided in the third aspect of the utility model comprises the motor or compressor proposed in any of the above technical solutions, and therefore has all the beneficial effects of the motor or compressor.

[0032] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 A schematic diagram showing the structure of a motor according to an embodiment of the utility model is shown;

[0035] Figure 2 A partial structural schematic diagram of a motor according to an embodiment of the utility model is shown;

[0036] Figure 3 A schematic structural diagram of a stator according to an embodiment of the utility model is shown;

[0037] Figure 4 The back electromotive force waveform diagram of the motor of one embodiment of the utility model is shown;

[0038] Figure 5 The figure shows a torque waveform diagram of a motor according to an embodiment of the utility model.

[0039] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0040] 1 rotor, 10 rotor core, 11 permanent magnet, 12 mounting slot, 2 stator, 20 first tooth portion, 200 chamfered surface, 21 second tooth portion, 22 stator slot, 3 winding. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0043] Refer to the following Figures 1 to 5 The present invention describes a motor, a compressor and an air-conditioning system according to some embodiments of the present invention.

[0044] like Figure 1 and Figure 2 As shown, according to an embodiment of the present utility model, the present utility model provides a motor, including: a rotor 1, a stator 2 and a winding 3.

[0045] Specifically, the stator 2 is located on the circumferential side of the rotor 1, and the stator 2 includes a plurality of first tooth portions 20 and a plurality of second tooth portions 21. The plurality of first tooth portions 20 and the plurality of second tooth portions 21 are alternately arranged along the circumferential direction of the stator 2. Along the circumferential direction of the stator 2, the width of the first tooth portion 20 is W1, and the width of the second tooth portion 21 is W2, W2 is smaller than W1, the minimum distance between the side of the first tooth portion 20 facing the rotor 1 and the outer side wall of the rotor 1 is d1, and the distance between the side of the second tooth portion 21 facing the rotor 1 and the outer side wall of the rotor 1 is d2, d1 is smaller than d2; it is wound around the first tooth portion 20.

[0046] The motor provided by the utility model comprises a rotor 1, a stator 2 and a winding 3 wound on the stator 2. The stator 2 is located on the circumferential side of the rotor 1, and the stator 2 comprises a plurality of first tooth portions 20 and a plurality of second tooth portions 21, and the plurality of first tooth portions 20 and the plurality of second tooth portions 21 are staggered along the circumferential direction of the stator 2, and the winding 3 is wound on the first tooth portion 20, and when the winding 3 is energized, the rotor 1 can be driven to rotate to realize the output of power. Among them, the width W2 of the second tooth portion 21 is smaller than the width W1 of the first tooth portion 20, which can ensure the winding area of ​​the winding 3 while optimizing the air gap magnetic flux harmonics, thereby ensuring the motor performance. The minimum distance d1 between the side of the first tooth portion 20 facing the rotor 1 and the outer side wall of the rotor 1 is smaller than the distance d2 between the side of the second tooth portion 21 facing the rotor 1 and the outer side wall of the rotor 1, that is, the spacing between the first tooth portion 20 and the rotor 1 is different from the spacing between the second tooth portion 21 and the rotor 1. Therefore, according to the setting of the second tooth portion 21, the air gap between the stator 2 and the rotor 1 can be adjusted, the air gap magnetic flux harmonics can be optimized, the torque can be increased, and the performance of the motor can be improved, the noise can be reduced, and the efficiency of the motor can be improved.

[0047] It is understandable that the winding 3 is only wound on the first tooth portion 20 and not on the second tooth portion 21 . The cross-sectional area of ​​the winding 3 is reduced, which can also improve the motor performance and reduce the cost of the motor.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, optionally, adjacent first tooth portions 20 and second tooth portions 21 enclose stator slots 22, and the number of stator slots 22 is N; the diameter of the stator 2 on the side away from the rotor 1 is D1, and along the axial direction of the stator 2, the thickness of the stator 2 is L1, and the number of pole pairs of the rotor 1 is P; d1, d2, N, L1, P and D1 satisfy the following formula: 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4; wherein LCM(N,P) represents the least common multiple of N and P.

[0049] In this embodiment, along the radial direction of the stator 2, the distance d1 between the first tooth portion 20 and the outer wall of the rotor 1, the distance d2 between the second tooth portion 21 and the outer wall of the rotor 1, the number N of stator slots 22, the outer diameter D1 of the stator 2, the axial thickness L1 of the stator 2 and the pole pair number P of the rotor 1 satisfy: 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4, so that the distance between the second tooth portion 21 and the outer wall of the rotor 1 is within a reasonable range, thereby modulating the air gap magnetic flux harmonics and improving the performance of the motor.

[0050] It can be understood that LCM (Least Common Multiple), LCM (N, P) represents the least common multiple of N and P.

[0051] Optionally, d1 is greater than or equal to 0.4 mm and less than or equal to 0.8 mm; d2 is greater than 0.8 mm and less than or equal to 3 mm.

[0052] Optionally, the value of (d2÷d1-1)×L1÷D1÷N×LCM(N,P) is any value among 0.8, 1, 1.2, 1.5, 1.8, 2, 2.1, 2.2, 2.3, and 2.4.

[0053] Alternatively, if Figure 4 As shown in FIG. 1 , a no-load reverse potential waveform is shown, where phase A, phase B and phase C represent the three phases of the motor. Figure 5 As shown, the load torque waveform is shown, and it can be seen that the performance of the motor has been improved.

[0054] It can be understood that multiple first tooth portions 20 and multiple second tooth portions 21 are alternately arranged along the circumferential direction of the stator 2, so that a second tooth portion 21 is arranged between two adjacent first tooth portions 20, and then the second tooth portion 21 will affect the area of ​​the winding 3 on the two adjacent first tooth portions 20. Therefore, reducing the thickness of the second tooth portion 21 can ensure the area of ​​the winding 3 on the first tooth portion 20 and ensure the performance of the motor.

[0055] In some embodiments, optionally, W1 and W2 satisfy the following formula: 0.25≤W2 / W1≤0.5.

[0056] In this embodiment, if the width of the second tooth portion 21 is too small, it will be difficult to process and manufacture, and will affect the strength of the second tooth portion 21. If the width of the second tooth portion 21 is too large, it will affect the area of ​​the winding 3. Therefore, the ratio of the width W2 of the second tooth portion 21 to the width W1 of the first tooth portion 20 is designed to be between 0.25 and 0.5, which can ensure both the strength of the second tooth portion 21 and the winding area of ​​the winding 3, thereby ensuring the magnetic field strength generated by the stator 2.

[0057] Optionally, the ratio of W2 to W1 is any value among 0.25, 0.3, 0.35, 0.4, 0.45, and 0.5.

[0058] In some embodiments, optionally, multiple first tooth portions 20 and multiple second tooth portions 21 are evenly distributed along the circumference of the stator 2; or on a cross section perpendicular to the axis of the stator 2, the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A1, and the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A2, and A1 is less than or equal to A2.

[0059] In this embodiment, a plurality of first tooth portions 20 and a plurality of second tooth portions 21 are evenly distributed along the circumference of the stator 2, thereby ensuring the performance of the motor. Alternatively, on a cross section perpendicular to the axis of the stator 2, the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A1, and the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A2, and A1 is less than or equal to A2, so that among the plurality of first tooth portions 20 and the plurality of second tooth portions 21, at least two tooth portions have different spans along the circumference of the stator 2. That is, the plurality of first tooth portions 20 and the plurality of second tooth portions 21 may also be unevenly distributed along the circumference of the stator 2, thereby improving the flexibility of manufacturing the stator 2.

[0060] Optionally, on a cross section perpendicular to the axis of the stator 2, an angle between a line connecting the center of at least one first tooth portion 20 and the axis of the stator 2, and a line connecting the center of an adjacent second tooth portion 21 and the axis of the stator 2 is A1, an angle between a line connecting the center of at least one first tooth portion 20 and the axis of the stator 2, and a line connecting the center of an adjacent second tooth portion 21 and the axis of the stator 2 is A2, and A1 is less than or equal to A2.

[0061] In some embodiments, optionally, when the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A1, and the angle between at least one first tooth portion 20 and an adjacent second tooth portion 21 relative to the axis of the stator 2 is A2, 0.9≤A1 / A2≤1.

[0062] In this embodiment, when at least one of the plurality of first tooth portions 20 and the plurality of second tooth portions 21 is unevenly distributed, the angle change caused by the uneven distribution is controlled within a small range, so that the size of the stator slot 22 is controlled within a reasonable range, ensuring the uniformity of the winding 3, thereby making the magnetic field more uniform and ensuring the performance of the motor. Specifically, 0.9≤A1 / A2≤1, ensuring the uniformity of the winding 3 and the performance of the motor.

[0063] Optionally, A1 / A2 is equal to any value among 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, and 1.

[0064] In some embodiments, optionally, the inner diameter of the stator 2 is D2, and D2 and D1 satisfy the following formula: 0.51≤D2 / D1≤0.65.

[0065] In this embodiment, the diameter of the area enclosed by the first tooth portion 20 toward one end of the rotor 1 is D2. If the ratio of D2 to D1 is too large, the cost will increase, and if the ratio is too small, the inertia of the rotor 1 will be affected. Therefore, the ratio of D2 to D1 is designed to be between 0.51 and 0.65, which can not only ensure the torque of the rotor 1, the inertia of the rotor 1, and improve the performance of the motor, but also reduce the cost of the motor.

[0066] Optionally, D2 / D1 is equal to any value among 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.6, and 0.65.

[0067] Optionally, the outer diameter of the stator 2 is D1, and the inner diameter of the stator 2 is D2.

[0068] It should be noted that the area enclosed by the first tooth portion 20 toward one end of the rotor 1 may be circular or not. In a specific application, in a cross section of the stator 2 perpendicular to the rotation axis of the rotor 1, a line connecting any two points on the edge of the area enclosed by the first tooth portion 20 toward one end of the rotor 1 is a first line, and a line in the first line passing through the rotation axis of the rotor 1 is a second line, and the second line is D2.

[0069] In some embodiments, optionally, the side of the first tooth portion 20 facing the rotor 1 includes a chamfered surface 200 , and the chamfered surface 200 is recessed or inclined from the side of the first tooth portion 20 facing the rotor 1 toward a direction away from the rotor 1 .

[0070] In this embodiment, a wall surface of one side of the first tooth portion 20 facing the rotor 1 includes a chamfered surface 200, and the chamfered surface 200 is concave or inclined in a direction away from the rotor 1, that is, a portion of the first tooth portion 20 at one end facing the rotor 1 is cut off to reduce the content of the air gap magnetic flux, reduce the electromagnetic excitation force generated by the air gap harmonic magnetic flux, thereby reducing the torque pulsation, and further reduce the vibration noise of the motor and improve the motor efficiency.

[0071] In some embodiments, optionally, the curved surface 200 includes a curved surface or a flat surface.

[0072] In this embodiment, the curved surface 200 can be a curved surface or a flat surface.

[0073] Optionally, the chamfered surface 200 is manufactured by cutting the end of the first tooth portion 20 . Of course, it can also be achieved by injection molding or other operations.

[0074] In some embodiments, optionally, the rotor 1 includes: a rotor core 10 and a plurality of permanent magnets 11 ; the rotor core 10 is provided with a plurality of mounting grooves 12 , and the plurality of permanent magnets 11 are disposed in the mounting grooves 12 , or the permanent magnets 11 are attached to the surface of the rotor 1 .

[0075] In this embodiment, the rotor 1 includes a rotor core 10 and a plurality of permanent magnets 11, and the plurality of permanent magnets 11 can be arranged in mounting grooves 12 of the rotor core 10 to ensure the connection strength between the permanent magnets 11 and the rotor core 10. They can also be attached to the surface of the rotor 1 to reduce the difficulty of processing.

[0076] In some embodiments, optionally, when the rotor core 10 is provided with a plurality of mounting grooves 12, the plurality of mounting grooves 12 radiate from the center of the rotor core 10 to the outer wall of the rotor core 10; or the plurality of mounting grooves 12 are distributed along the circumference of the rotor 1, and any mounting groove 12 is V-shaped, and the V-shaped mounting groove 12 is arranged away from the axis of the rotor core 10.

[0077] In this embodiment, when the rotor core 10 is provided with mounting grooves 12, the plurality of mounting grooves 12 are radial, and the arrangement of the plurality of permanent magnets 11 is also radial from the center of the rotor core 10 to the outer wall; the plurality of mounting grooves 12 are distributed along the circumference of the rotor core 10, and any mounting groove 12 is V-shaped, so that the permanent magnet 11 is arranged in the mounting groove 12 in a V-shape, which is beneficial to reduce the vibration and deformation of the motor.

[0078] According to an embodiment of the present invention, a compressor is also provided, comprising: a motor as provided in any of the above embodiments.

[0079] The compressor provided by the utility model comprises the motor proposed in any of the above embodiments and therefore has all the beneficial effects of the motor.

[0080] According to an embodiment of the present utility model, an air conditioning system is also proposed, including: a motor or a compressor as proposed in any of the above embodiments.

[0081] The air conditioning system provided by the utility model comprises the motor or compressor proposed in any of the above embodiments, and therefore has all the beneficial effects of the motor or compressor.

[0082] In a specific application, the present application proposes a motor and a compressor, which relates to the field of motor technology. The stator 2 includes an armature winding (such as winding 3) and a stator core. The stator core is made of silicon steel sheets of a certain size stacked along the axial direction, and the armature winding is wound on the teeth of the stator core. The stator teeth include main teeth (such as the first tooth portion 20) and auxiliary teeth (such as the second tooth portion 21). The tooth width of the main teeth is greater than that of the auxiliary teeth, and the main teeth and the auxiliary teeth are arranged alternately, and the armature winding is only wound on the main teeth. Through the design of stator 2, the efficiency of the motor can be improved and the material cost can be reduced.

[0083] Specifically, the permanent magnet motor is composed of a stator 2 and a rotor 1, and the stator 2 is located outside the rotor 1. The number of stator slots 22 is N, the outer diameter of the stator 2 is D1, the stack thickness of the stator 2 is L1, the shortest distance between the surface of the main tooth close to the air gap and the outer circle of the rotor 1 is d1, and the shortest distance between the surface of the auxiliary tooth close to the air gap and the outer circle of the rotor 1 is d2.

[0084] The rotor 1 is composed of a rotor core 10 and a magnet. The number of pole pairs of the rotor 1 is P.

[0085] 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4.

[0086] Optionally, the tooth width W1 of the main tooth and the tooth width W2 of the auxiliary tooth satisfy: 0.25≤W2 / W1≤0.5.

[0087] Optionally, in order to ensure the inertia of the rotor 1 and take into account the electromagnetic performance of the motor, the inner diameter D2 of the stator 2 and the outer diameter D1 of the stator 2 satisfy: 0.51≤D2 / D1≤0.65.

[0088] Optionally, the stator 2 is a tooth slot structure, and the N stator teeth may be evenly or unevenly distributed, that is, the spans of the stator teeth may be equal or unequal. The minimum span A1 and the maximum span A2 of the stator teeth satisfy: 0.9≤A1 / A2≤1.

[0089] Optionally, the tooth tips of the main teeth of the stator 2 may adopt a chamfered structure or a non-chamfered structure. The chamfered structure may be a straight line, a circular arc, or the like.

[0090] Optionally, the rotor 1 is a permanent magnet rotor structure, and the permanent magnets 11 may be distributed on the rotor 1 in a surface-mounted, V-shaped, or spoke-shaped manner.

[0091] Optionally, the motor is used in household appliances such as air-conditioning compressors.

[0092] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to 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.

[0094] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A motor, characterized in that: include: Rotor; a stator, located on the circumferential side of the rotor, the stator comprising a plurality of first tooth portions and a plurality of second tooth portions, the plurality of first tooth portions and the plurality of second tooth portions being alternately arranged along the circumferential direction of the stator; along the circumferential direction of the stator, the width of the first tooth portion is W1, the width of the second tooth portion is W2, and W2 is smaller than W1; the minimum distance between a side of the first tooth portion facing the rotor and an outer side wall of the rotor is d1, the distance between a side of the second tooth portion facing the rotor and an outer side wall of the rotor is d2, and d1 is smaller than d2; The winding is wound around the first tooth portion.

2. The motor according to claim 1, characterized in that The adjacent first tooth portions and the second tooth portions enclose a stator slot, and the number of the stator slots is N; The diameter of the stator on the side away from the rotor is D1, the thickness of the stator along the axial direction of the stator is L1, and the number of pole pairs of the rotor is P; d1, d2, N, L1, P, and D1 satisfy the following formula: 0.8≤(d2÷d1-1)×L1÷D1÷N×LCM(N,P)≤2.4; Wherein, LCM(N, P) represents the least common multiple of N and P.

3. The motor according to claim 1, characterized in that W1 and W2 satisfy the following formula: 0.25≤W2 / W1≤0.

5.

4. The motor according to claim 1, characterized in that A plurality of the first tooth portions and a plurality of the second tooth portions are evenly distributed along the circumference of the stator; or In a cross section perpendicular to the axis of the stator, an angle between at least one of the first tooth portions and an adjacent second tooth portion relative to the axis of the stator is A1, an angle between at least one of the first tooth portions and an adjacent second tooth portion relative to the axis of the stator is A2, and A1 is less than or equal to A2.

5. The motor according to claim 4, characterized in that When the angle between at least one of the first tooth portions and the adjacent second tooth portion relative to the axis of the stator is A1, and the angle between at least one of the first tooth portions and the adjacent second tooth portion relative to the axis of the stator is A2, 0.9≤A1 / A2≤1.

6. The motor according to claim 2, characterized in that The inner diameter of the stator is D2, and D2 and D1 satisfy the following formula: 0.51≤D2 / D1≤0.

65.

7. The electric machine according to any one of claims 1 to 6, characterized in that The side of the first tooth portion facing the rotor includes a chamfered surface, and the chamfered surface is concave or inclined from the side of the first tooth portion facing the rotor toward a direction away from the rotor.

8. The motor according to claim 7, characterized in that The arc-cut surface includes a curved surface or a flat surface.

9. The electric machine according to any one of claims 1 to 6, characterized in that The rotor comprises: A rotor core and a plurality of permanent magnets; The rotor core is provided with a plurality of installation grooves, and a plurality of permanent magnets are arranged in the installation grooves, or the permanent magnets are attached to the surface of the rotor.

10. The motor according to claim 9, characterized in that When the rotor core is provided with a plurality of the mounting grooves, the plurality of mounting grooves are radially arranged from the center of the rotor core to the outer side wall of the rotor core; or A plurality of the mounting grooves are distributed along the circumference of the rotor, and any of the mounting grooves is V-shaped, and the V-shaped mounting groove is arranged away from the axis of the rotor core.

11. A compressor, characterized in that: include: A motor as claimed in any one of claims 1 to 10.

12. An air conditioning system, characterized in that: include: An electric machine as claimed in any one of claims 1 to 10; or The compressor of claim 11.

Images