Motor, compressor and refrigeration equipment

Abstract

The utility model discloses a motor, a compressor and refrigeration equipment, the motor comprises a stator, the stator comprises a stator iron core and a winding, the stator iron core is provided with a plurality of stator teeth, the winding is wound on the stator teeth, and a stator slot is defined between two adjacent stator teeth; the rotor is arranged in an inner cavity of the stator, the rotor comprises a rotor iron core and magnets, the rotor iron core is provided with a plurality of installation grooves, the installation grooves are arranged at intervals in the circumferential direction of the rotor iron core, the magnets are suitable for being installed in the installation grooves, the number of stator grooves is Q, the number of poles of the rotor is 2p, the phase number of the winding is m, the outer diameter of the stator is D1, the inner diameter of the stator is D2, and GCD (Q, G, D) is smaller than Q; 2p) is the largest common divisor of the number of the stator slots and the number of the poles of the rotor and satisfies Q / (2pm) lt; 1, 11.2 < = (D2 / D1) (GCD (Q, 2p)) 2 < = 16.5. According to the motor provided by the embodiment of the utility model, the power density of the motor can be improved and the vibration noise of the motor can be reduced by limiting the largest common divisor of the stator slots and the rotor poles and the inner and outer diameters of the stator.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor, a compressor and a refrigeration device. Background Art

[0002] In the related art, the motors of existing household air conditioner compressors mainly adopt variable-frequency motors. In order to ensure the stability and high efficiency of high-frequency operation, the electrical frequency of the motor is often designed in a relatively low range. At the same time, in order to adapt to the automated production of the stator windings of the motor, a relatively small number of stator slots are usually selected to improve the utilization rate of the space in the slots. These will make it more difficult to improve the power density of the motor. However, variable-frequency motors with a high-power density design often have a relatively high electromagnetic excitation, resulting in relatively large noise and vibration, and there is room for improvement. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a motor with a high power density and low noise and vibration.

[0004] The utility model also provides a compressor.

[0005] The utility model also provides a refrigeration device.

[0006] The motor according to the first aspect embodiment of the utility model includes: a stator, the stator includes a stator core and windings, the stator core has a plurality of stator teeth, the windings are wound around the stator teeth, and a stator slot is defined between two adjacent stator teeth; a rotor, the rotor is arranged in the inner cavity of the stator, the rotor includes a rotor core and magnets, the rotor core has a plurality of mounting slots, the plurality of mounting slots are arranged at intervals along the circumferential direction of the rotor core, and the magnets are adapted to be mounted in the mounting slots. Wherein, the number of the stator slots is Q, the number of poles of the rotor is 2p, the number of phases of the windings is m, and the outer diameter of the stator is D1, the inner diameter of the stator is D2, GCD(Q, 2p) is the greatest common divisor of the number of the stator slots and the number of poles of the rotor, and it satisfies: Q / (2pm) < 1, 11.2 ≤ (D2 / D1)(GCD(Q, 2p)) 2 ≤ 16.5.

[0007] By defining the greatest common divisor of the stator slots and the number of poles of the rotor and the inner and outer diameters of the stator, the motor according to the embodiment of the utility model can improve the utilization rate of the space in the stator slots of the motor, make the variable loss and the constant loss of the motor at a relatively average level, keep the motor efficiency at a relatively high level, further improve the power density, and at the same time reduce the motor vibration and noise problems.

[0008] According to some embodiments of the present utility model, the tooth width of the stator tooth is Bt, satisfying: 1.8 ≤ 100Bt / (πD2) ≤ 2.95.

[0009] In some examples, the tooth width of the stator tooth is Bt, satisfying: 3.5 mm ≤ Bt ≤ 17 mm.

[0010] According to some embodiments of the present utility model, 80 mm ≤ D1 ≤ 200 mm.

[0011] According to some embodiments of the present utility model, the stator core is formed by laminating a plurality of silicon steel sheets, and / or, the rotor core is formed by laminating a plurality of silicon steel sheets, wherein the thickness of the silicon steel sheet is T, 0.3 mm ≤ T ≤ 0.35 mm.

[0012] In some examples, GCD(Q, 2p) ≥ 5.

[0013] In some examples, the number of stator slots is Q, and the number of poles of the rotor is 2p, satisfying: 2p / Q = 2 / 3.

[0014] In some examples, the number of stator slots is Q, and the number of poles of the rotor is 2p, satisfying: Q = 15, 2p = 10.

[0015] The compressor according to the embodiment of the second aspect of the present utility model includes the motor according to the embodiment of the first aspect of the present utility model. By adopting the above motor, the energy efficiency of the compressor can be improved, and the noise and vibration of the compressor can be reduced.

[0016] The refrigeration device according to the embodiment of the third aspect of the present utility model includes the motor according to the embodiment of the first aspect of the present utility model, or includes the compressor according to the embodiment of the second aspect of the present utility model. By adopting the above motor or compressor, the working efficiency of the refrigeration device can be improved, and the noise and vibration of the refrigeration device can be reduced.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of a motor according to some embodiments of the present utility model;

[0020] Figure 2 is a schematic dimension diagram of a motor according to some embodiments of the present utility model;

[0021] Figure 3 is a schematic structural diagram of a refrigeration device according to some embodiments of the present utility model;

[0022] Figure 4 is a power density curve graph of a motor according to some embodiments of the present utility model;

[0023] Figure 5 is the noise OA value of a motor under the working condition of 60 Hz according to some embodiments of the present utility model;

[0024] Figure 6 is the noise OA value of a motor under the working condition of 90 Hz according to some embodiments of the present utility model.

[0025] Reference numerals:

[0026] motor 100, compressor 1000, refrigeration device 10000,

[0027] stator 10, stator core 11, stator teeth 111, stator slots 112, winding 12,

[0028] rotor 20, rotor core 21, mounting groove 211, magnet 22. Detailed implementation manners

[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Reference will be made below to Figures 1 - 6 describe the motor 100 according to an embodiment of the present utility model.

[0033] As Figures 1 - 6 shown, the motor 100 according to an embodiment of the present utility model includes: a stator 10 and a rotor 20; the stator 10 includes a stator core 11 and windings 12. The stator core 11 has a plurality of stator teeth 111, and the windings 12 are wound around the stator teeth 111. A stator slot 112 is defined between two adjacent stator teeth 111 for accommodating the windings 12, which can improve the fixing effect on the windings 12, reduce the probability of the windings 12 loosening, and is beneficial to improving the heat dissipation effect of the windings 12 and enhancing the performance of the motor 100.

[0034] The rotor 20 is disposed in the inner cavity of the stator 10. The rotor 20 includes a rotor core 21 and magnets 22. The rotor core 21 has a plurality of mounting slots 211, and the plurality of mounting slots 211 are arranged at intervals along the circumferential direction of the rotor core 21. The magnets 22 can be mounted in the mounting slots 211 to generate a permanent magnetic field in the rotor 20. After the windings 12 are energized, the windings 12 can generate a rotating magnetic field in the stator 10. Thus, the rotating magnetic field of the stator 10 can drive the permanent magnetic field of the rotor 20 to rotate, so as to drive the rotor 20 to rotate relative to the stator 10, ensuring the normal operation of the motor 100.

[0035] Among them, the number of stator slots 112 is Q, the number of poles of the rotor 20 is 2p, and the number of phases of the windings 12 is m. Q / (2pm) is the number of slots occupied by each phase of the windings 12 under each magnetic pole. By defining Q / (2pm) < 1, the motor 100 can use fractional slots, which is beneficial to saving energy, improving work efficiency, and reducing noise. The fractional slots can adopt concentrated windings 12, which is beneficial to improving the regularity of automatic winding, can improve the utilization rate of the space in the stator slots 112, and can make the variable loss and constant loss of the motor 100 at a relatively average level, thereby improving the work efficiency of the motor 100 and increasing the power density of the motor 100.

[0036] GCD(Q, 2p) is the greatest common divisor of the number of stator slots 112 and the number of poles of the rotor 20. GCD(Q, 2p) can represent the order of the minimum electromagnetic force generated by the motor 100, and the vibration of the motor 100 is approximately inversely proportional to the fourth power of the order of the electromagnetic force of the motor 100. If the order of the electromagnetic force of the motor 100 is too small, the vibration of the motor 100 is too large, affecting the stability of the operation of the motor 100 and easily generating a large amount of noise. If the order of the electromagnetic force of the motor 100 is too large, it is easy to increase the complexity of the motor 100's electronic control, affecting the reliability of the operation of the motor 100.

[0037] Therefore, on the basis of ensuring Q / (2pm) < 1, Q, 2p, and GCD(Q, 2p) can be determined according to actual design requirements, which is beneficial to reducing the vibration level of the motor 100, reducing the noise of the motor 100, improving the stability of the operation of the motor 100, and at the same time facilitating the simplification of the electronic control of the motor 100 and improving the reliability of the operation of the motor 100.

[0038] Furthermore, the outer diameter of the stator 10 is D1, the inner diameter of the stator 10 is D2, and the dimensions of the stator 10 of the motor 100 can be associated with the greatest common divisor of the number of stator slots 112 and the number of poles of the rotor 20. For example, the ratio of the outer diameter to the inner diameter of the stator 10 can be multiplied by the square of the greatest common divisor of the number of stator slots 112 and the number of poles of the rotor 20, that is, (D2 / D1)(GCD(Q, 2p)) 2 , if (D2 / D1)(GCD(Q, 2p)) 2 is too large or too small, it is easy to reduce the working efficiency of the motor 100 and increase the cost of the motor 100.

[0039] Therefore, (D2 / D1)(GCD(Q, 2p)) 2 can be limited between 11.2 - 16.5. (D2 / D1)(GCD(Q, 2p)) 2 can be any one of the point values 11.2, 12, 13, 14, 15, 16, 16.5 or the range value between any two of them. Thus, by inputting the pre-determined (GCD(Q, 2p)) 2 into (D2 / D1)(GCD(Q, 2p)) 2 , the range of the ratio of the outer diameter to the inner diameter of the stator 10 can be determined, which is beneficial for designers to determine reasonable dimensions for the high-power density motor 100, thereby further improving the working efficiency of the motor 100 and reducing the cost of the motor 100.

[0040] According to the motor 100 of the embodiment of the present utility model, by defining the greatest common divisor of the number of stator slots 112 and the number of rotor poles 20 and the inner and outer diameters of the stator 10, the utilization rate of the space in the stator slots 112 of the motor 100 can be improved, so that the variable losses and constant losses of the motor 100 are at a relatively average level, the efficiency of the motor 100 is maintained at a high level, the power density can be further increased, and at the same time, the vibration and noise problems of the motor 100 can be reduced.

[0041] As Figure 2 shown, according to some embodiments of the present utility model, the tooth width of the stator tooth 111 is Bt, and the size of the stator 10 of the motor 100 can be associated with the tooth width of the stator tooth 111. For example, the tooth width of the stator tooth 111 can be divided by the inner circumference of the stator 10, that is, 100Bt / (πD2). If the stator tooth 111 is too wide, the size of the stator slot 112 is smaller, which is likely to increase the copper loss of the motor 100. If the stator tooth 111 is too narrow, the size of the stator slot 112 is larger, which is likely to increase the iron loss of the motor 100.

[0042] Therefore, 100Bt / (πD2) can be limited between 1.8 and 2.95. 100Bt / (πD2) can be any one of the point values of 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.95 or the range value between any two of them, which is beneficial to reducing the copper loss of the motor 100, beneficial to reducing the iron loss of the motor 100, and can make the variable losses and constant losses of the motor 100 at a relatively average level. At the same time, energy can be saved, thereby improving the working efficiency of the motor 100 and increasing the power density of the motor 100.

[0043] As Figure 2 shown, in some examples, the tooth width of the stator tooth 111 is Bt. If the stator tooth 111 is too wide, the size of the stator slot 112 is smaller, which is likely to increase the copper loss of the motor 100. If the stator tooth 111 is too narrow, the size of the stator slot 112 is larger, which is likely to increase the iron loss of the motor 100. Thus, by inputting the pre-determined D2 into 100Bt / (πD2), the ratio range of Bt can be determined.

[0044] Thus, Bt can be limited between 3.5 mm and 17 mm. Bt can be any one of the point values of 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm or the range value between any two of them, which is beneficial to reducing the copper loss of the motor 100, beneficial to reducing the iron loss of the motor 100, and can make the variable loss and constant loss of the motor 100 at a relatively average level. At the same time, energy can be saved, thereby improving the working efficiency of the motor 100 and increasing the power density of the motor 100.

[0045] As Figure 2 shown, according to some embodiments of the present invention, if the size of the stator 10 is too large, it is easy to increase the volume of the motor 100, affecting the layout form of the motor 100. If the size of the stator 10 is too small, it increases the manufacturing difficulty of the motor 100 and it is difficult to ensure the performance of the motor 100. Thus, the outer diameter of the stator 10 can be limited between 80 mm and 200 mm. D1 can be any one of the point values of 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm or the range value between any two of them. On the basis of ensuring the performance of the motor 100, the volume of the motor 100 can be appropriately reduced, which is beneficial to the miniaturization of the motor 100 and convenient for the layout of the motor 100.

[0046] According to some embodiments of the present invention, the stator core 11 can be formed by laminating a plurality of silicon steel sheets, which can reduce the eddy current loss of the motor 100 and improve the working efficiency of the motor 100.

[0047] According to some embodiments of the present invention, the rotor core 21 is formed by laminating a plurality of silicon steel sheets, which can reduce the eddy current loss of the motor 100 and improve the working efficiency of the motor 100.

[0048] In some examples, the thickness of the silicon steel sheet is T. If the thickness of the silicon steel sheet is too large, the magnetic resistance of the iron core is greater, and the magnetic flux density of the iron core is smaller, and the magnetic loss is greater, affecting the working efficiency of the motor 100. If the thickness of the silicon steel sheet is too thin, the magnetic permeability of the iron core will be reduced, and it is easy to increase the hysteresis loss of the iron core, which has an adverse effect on the operation of the motor 100.

[0049] Thus, the thickness of the silicon steel sheet can be limited to be between 0.3 mm and 0.35 mm. T can be any point value among 0.3 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm or the range value between any two of them, which can reduce the energy loss of the motor 100 and improve the working efficiency of the motor 100. In addition, when the thickness T of the silicon steel sheet is appropriate, the output power of the motor 100 can be increased and the working noise of the motor 100 can be reduced.

[0050] In some examples, GCD(Q, 2p) is the greatest common divisor of the number of stator slots 112 and the number of poles of the rotor 20. GCD(Q, 2p) can represent the order of the minimum electromagnetic force generated by the motor 100, and the vibration of the motor 100 is approximately inversely proportional to the fourth power of the electromagnetic force order of the motor 100. If the electromagnetic force order of the motor 100 is too small, the vibration of the motor 100 is too large, which affects the working stability of the motor 100 and is prone to generate relatively large noise.

[0051] Thus, on the basis of ensuring Q / (2pm) < 1, GCD(Q, 2p) can be limited to a range greater than or equal to 5. GCD(Q, 2p) can be any point value among 5, 6, 7, 8 or the range value between any two of them, and the range value greater than 8, which is beneficial to reducing the vibration degree of the motor 100 and is beneficial to reducing the noise of the motor 100, and can improve the working stability of the motor 100.

[0052] In some examples, the number of stator slots 112 is Q, and the number of poles of the rotor 20 is 2p. On the basis of ensuring GCD(Q, 2p) ≥ 5, the ratio of the number of poles of the rotor 20 to the number of stator slots 112 can be 2 / 3, which can make the motor 100 generate a specific spatial harmonic magnetic field distribution during operation, thereby improving the performance of the motor 100.

[0053] Among them, by limiting 2p / Q to 2 / 3, the distribution of the magnetic field can be made more uniform, the iron loss and copper loss can be reduced, the working efficiency of the motor 100 can be improved, and at the same time, the electromagnetic fluctuation during the operation of the motor 100 can be reduced, making the operation of the motor 100 more stable. Of course, by optimizing the ratio of the number of poles of the rotor 20 to the number of stator slots 112, the noise and vibration during the operation of the motor 100 can also be reduced, and the working stability of the motor 100 can be improved.

[0054] For example, when GCD(Q, 2p) = 5, the number of poles of the rotor 20 can be 10, and the number of stator slots 112 can be 15. When GCD(Q, 2p) = 6, the number of poles of the rotor 20 can be 6, and the number of stator slots 112 can be 9. When GCD(Q, 2p) = 7, the number of poles of the rotor 20 can be 14, and the number of stator slots 112 can be 21.

[0055] As Figure 1 shown, in some examples, the number of stator slots 112 is Q, the number of poles of the rotor 20 is 2p, the vibration level of the motor 100 is inversely proportional to the order of the minimum electromagnetic force generated by the motor 100, and GCD(Q, 2p) can represent the order of the minimum electromagnetic force generated by the motor 100. The designer can select the number of poles of the rotor 20 to be 10, and Q / (2pm) < 1, which can ensure that the motor 100 adopts the form of a fractional-slot concentrated winding 12. That is, in order to simplify the electric control and make the winding of the winding 12 more regular, the designer can select the number of stator slots 112 to be 15. Thus, by setting the number of stator slots 112 to 15 and the number of poles of the rotor 20 to 10, the vibration and noise of the motor 100 can be reduced, the electric control of the motor 100 can be simplified, the winding of the winding 12 can be made more regular, and it is convenient for manufacturing.

[0056] In some examples, the winding 12 can be wound with enameled copper wire, which can improve the electrical conductivity and heat conduction performance of the winding 12, reduce the resistance of the winding 12, reduce the operating loss of the motor 100, and can improve the service life of the winding 12, and can reduce the maintenance cost of the motor 100.

[0057] In some examples, the winding 12 can be wound with enameled aluminum wire, which can reduce the weight of the winding 12 and is beneficial to reducing the cost of the motor 100.

[0058] In some examples, Figure 4 is the power density curve of the motor 100. The abscissa of the curve is the value of (D2 / D1)(GCD(Q, 2p)) 2 and the ordinate of the curve is the power density of the motor 100. In this application, 11.2 ≤ (D2 / D1)(GCD(Q, 2p)) 2 ≤ 16.5, while in the prior art, 1 ≤ (D2 / D1)(GCD(Q, 2p)) 2 ≤ 10.5.

[0059] Among them, it can be observed from the attached Figure 4 that on the power density curve, when the abscissa is 11.2, the ordinate is 1.08, when the abscissa is 16.5, the ordinate is 1.1, and when the value of the abscissa is in the range of 11.2 to 16.5, the curve generally shows a trend of rising first and then falling; when the abscissa is 1, the ordinate is 0.49, when the abscissa is 10.5, the ordinate is 1.05, and when the value of the abscissa is in the range of 1 to 10.5, the curve generally shows an upward trend. Thus, it can be seen that the power density of the motor 100 in this application is greater than that of the motors in the prior art.

[0060] In some examples,Figure 5 The OA value of the noise of the motor 100 under the 60 Hz operating condition, the abscissa is the value of GCD(Q, 2p), and the ordinate is the OA value of the noise. In this application, GCD(Q, 2p) = 5, while in the prior art, GCD(Q, 2p) < 5; among them, by observing the attached Figure 5 It can be seen that when the abscissa is 1, the ordinate is 74.6, when the abscissa is 2, the ordinate is 72.1, when the abscissa is 3, the ordinate is 71.4, when the abscissa is 4, the ordinate is 70.8, and when the abscissa is 5, the ordinate is 68.7. From this, it can be known that the OA value of the noise of the motor 100 of this application under the 60 Hz operating condition is less than the OA value of the noise of the motor in the prior art under the 60 Hz operating condition.

[0061] In some examples, Figure 6 The OA value of the noise of the motor 100 under the 90 Hz operating condition, the abscissa is the value of GCD(Q, 2p), and the ordinate is the OA value of the noise. In this application, GCD(Q, 2p) = 5, while in the prior art, GCD(Q, 2p) < 5; among them, by observing the attached Figure 6 It can be seen that when the abscissa is 1, the ordinate is 79, when the abscissa is 2, the ordinate is 78.32, when the abscissa is 3, the ordinate is 77.69, when the abscissa is 4, the ordinate is 76.8, and when the abscissa is 5, the ordinate is 74.3. From this, it can be known that the OA value of the noise of the motor 100 of this application under the 90 Hz operating condition is less than the OA value of the noise of the motor in the prior art under the 90 Hz operating condition.

[0062] As Figure 3 shown, the compressor 1000 according to an embodiment of the present invention includes a motor 100. By adopting the above-mentioned motor 100, the energy efficiency of the compressor 1000 can be improved, and the noise and vibration of the compressor 1000 can be reduced.

[0063] As Figure 3 shown, the refrigeration device 10000 according to an embodiment of the present invention includes a motor 100 or a compressor 1000. By adopting the above-mentioned motor 100 or compressor 1000, the working efficiency of the refrigeration device 10000 can be improved, and the noise and vibration of the refrigeration device 10000 can be reduced.

[0064] According to some embodiments of the present invention, the refrigeration device 10000 can be an air conditioner, a refrigerator, a vehicle, etc.

[0065] Other components and operations of the refrigeration device 10000 according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein. In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. Among them, the up-down direction, left-right direction, and front-back direction are subject to the up-down direction, left-right direction, and front-back direction shown in the figure.

[0066] In the description of the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0068] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that, Comprising: A stator, the stator comprising a stator core and windings, the stator core having a plurality of stator teeth, the windings being wound around the stator teeth, and a stator slot being defined between two adjacent stator teeth; A rotor, the rotor being disposed in the inner cavity of the stator, the rotor comprising a rotor core and magnets, the rotor core having a plurality of mounting slots, the plurality of mounting slots being arranged at intervals along the circumferential direction of the rotor core, and the magnets being adapted to be mounted in the mounting slots, Wherein, the number of the stator slots is Q, the number of poles of the rotor is 2p, the number of phases of the winding is m, the outer diameter of the stator is D1, the inner diameter of the stator is D2, GCD(Q, 2p) is the greatest common divisor of the number of the stator slots and the number of poles of the rotor, and it satisfies: Q / (2pm) < 1, 11.2 ≤ (D2 / D1)(GCD(Q, 2p)) 2 ≤ 16.

5.

2. The motor according to claim 1, characterized in that The tooth width of the stator teeth is Bt, satisfying: 1.8 ≤ 100Bt / (πD2) ≤ 2.

95.

3. The motor according to claim 2, characterized in that, The tooth width of the stator teeth is Bt, satisfying: 3.5 mm ≤ Bt ≤ 17 mm.

4. The motor according to claim 1, characterized in that, 80 mm ≤ D1 ≤ 200 mm.

5. The motor according to claim 1, wherein The stator core is formed by laminating a plurality of silicon steel sheets, and / or, the rotor core is formed by laminating a plurality of silicon steel sheets, Wherein, the thickness of the silicon steel sheet is T, 0.3 mm ≤ T ≤ 0.35 mm.

6. The motor according to any one of claims 1-5, characterized in that, GCD(Q, 2p) ≥ 5.

7. The motor according to claim 6, characterized in that, The number of stator slots is Q, and the number of poles of the rotor is 2p, satisfying: 2p / Q = 2 / 3.

8. The motor according to claim 7, characterized in that, The number of stator slots is Q, and the number of poles of the rotor is 2p, satisfying: Q = 15, 2p = 10.

9. A compressor, characterized in that, Comprising the motor according to any one of claims 1-8.

10. A refrigeration device, characterized in that, Comprising the motor according to any one of claims 1-8, or, comprising the compressor according to claim 9.

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