Motor, compressor and refrigeration equipment

Abstract

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of compressors, the motor comprises a stator and a rotor, the stator is provided with a plurality of stator grooves, and the number of the stator grooves is Q; the rotor is arranged on the inner side of the stator; wherein the number of rotor poles of the rotor punching sheet is 2P, the maximum distance from the outer edge of the rotor punching sheet to the center of the rotor is Ro, the minimum distance from the outer edge of the rotor punching sheet to the center of the rotor is Ri, the magnet groove is provided with a first end point and a second end point which are closest to the outer edge of the rotor punching sheet, and the included angle between the first end point and the center of the rotor and the included angle between the second end point and the center of the rotor are alpha, the included angle beta of each magnetic pole on the rotor punching sheet is greater than or equal to 0.03 mm and less than or equal to 0.1 mm, and greater than or equal to 0.12 and less than or equal to 0.15; according to the technical scheme, the energy efficiency of the motor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a motor, a compressor and a refrigeration device. Background Art

[0002] With the rapid development of the economy and the improvement of people's living standards, miniaturization, high efficiency, and low noise are increasingly becoming the demands of the compressor industry. Existing motors suffer from high torque ripple, resulting in poor operating stability, high vibration and noise levels, and thus reduced overall energy efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to provide a motor, a compressor and a refrigeration device, aiming to improve the energy efficiency of the motor.

[0004] To achieve the above-mentioned object, the motor proposed in the present invention includes: A stator is provided with a plurality of stator slots, the number of the stator slots being Q; a rotor disposed inside the stator, the rotor comprising a plurality of rotor punchings stacked along its axial direction, the rotor punchings having a plurality of magnet slots distributed along its circumference; The number of rotor poles of the rotor punching is 2P, the maximum distance from the outer edge of the rotor punching to the center of the rotor is Ro, the minimum distance from the outer edge of the rotor punching to the center of the rotor is Ri, the magnet slot has a first end point and a second end point closest to the outer edge of the rotor punching, the angle between the first end point and the second end point and the center of the rotor is α, the angle occupied by each magnetic pole on the rotor punching is β, 0.03mm≤ ≤0.1mm,0.12≤ ≤0.15.

[0005] In one embodiment, 0.5 mm ≤ Ro - Ri ≤ 1.5 mm.

[0006] In one embodiment, 23°≤α≤26°.

[0007] In one embodiment, the minimum distance from the magnet slot to the center of the rotor is L, and the magnet slot includes two angularly arranged skewed slot segments, the two skewed slot segments are arranged close to each other in a direction away from the outer edge of the rotor punching, and the angle between the two skewed slot segments is γ, 16°≤ ≤19°, 12°≤β- ≤14°.

[0008] In one embodiment, 110°≤γ≤120°.

[0009] In one embodiment, 0.73≤ ≤0.79.

[0010] In one embodiment, 5≤GCD(Q, P)≤6.

[0011] In one embodiment, 1.4≤Q / 2P≤1.6.

[0012] In one embodiment, Q=15, and P=5.

[0013] In one embodiment, two buckle holes are provided on the magnetic pole of the rotor punching, and the two buckle holes are provided on opposite sides of the magnet slot along the radial direction of the rotor punching.

[0014] In one embodiment, the rotor punching is provided with an axial hole concentric with the rotation center of the rotor, and the diameter of the axial hole is D, 19 mm ≤ D ≤ 22 mm.

[0015] The present invention also provides a compressor, which includes the motor as described above.

[0016] The present invention also provides a refrigeration device, which includes the compressor described above.

[0017] In the technical solution of the present invention, the motor includes a stator and a rotor arranged inside the stator, the rotor includes a plurality of rotor punchings, and each rotor punching is stacked along its axial direction, wherein the rotor punching is provided with a plurality of magnet slots, and the magnet slot has a first end point and a second end point closest to the outer edge of the rotor punching. Furthermore, by limiting the number of stator slots Q, the number of rotor poles 2P of the rotor punching, the maximum distance Ro from the outer edge of the rotor punching to the rotor center, the minimum distance Ri from the outer edge of the rotor punching to the rotor center, and the angle α formed by the first end point and the second end point and the rotor center, the angle β occupied by each magnetic pole on the rotor punching satisfies: 0.03mm≤ ≤0.1mm,0.12≤ ≤0.15; In this way, the outer edge of the rotor punching is concave, forming a non-uniform air gap. 、 By changing the value of the magnetic field, changing its shape and position, guiding or blocking the magnetic flux path, and achieving the magnetic modulation effect, the distribution of the air gap magnetic field can be reliably optimized, the harmonic content can be reduced, the sinusoidality of the air gap magnetic field can be improved, and the torque pulsation of the motor can be reduced, thereby improving the motor efficiency and the energy efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of a motor provided by the present invention.

[0020] Description of Figure Numbers: 10. Rotor punching sheet; 11. Magnet slot; 111. First endpoint; 112. Second endpoint; 113. Bevel slot section; 12. Shaft hole; 13. Buckle hole.

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] With the rapid development of the economy and the improvement of people's living standards, miniaturization, high efficiency, and low noise are increasingly becoming the demands of the compressor industry. Existing motors suffer from high torque ripple, resulting in poor operating stability, high vibration and noise levels, and thus reduced overall energy efficiency.

[0026] In order to solve this technical problem, the present invention provides a motor.

[0027] See also Figure 1 In one embodiment of the present invention, the motor includes a stator and a rotor, the stator is provided with a plurality of stator slots, the number of the stator slots being Q; the rotor is provided on the inner side of the stator, the rotor including a plurality of rotor punchings 10 stacked along its axial direction, the rotor punchings 10 having a plurality of magnet slots 11 distributed along its circumference; wherein the number of rotor poles of the rotor punchings 10 is 2P, the maximum distance from the outer edge of the rotor punchings 10 to the center of the rotor is Ro, the minimum distance from the outer edge of the rotor punchings 10 to the center of the rotor is Ri, the magnet slot 11 has a first endpoint 111 and a second endpoint 112 closest to the outer edge of the rotor punchings 10, the angle formed between the first endpoint 111 and the second endpoint 112 and the center of the rotor is α, the angle occupied by each magnetic pole on the rotor punchings 10 is β, 0.03mm≤ ≤0.1mm,0.12≤ ≤0.15; in order to improve the energy efficiency of the whole machine.

[0028] In the technical solution of the present invention, the motor includes a stator and a rotor arranged inside the stator, the rotor includes a plurality of rotor punchings 10, and each rotor punching 10 is stacked along its axial direction, wherein the rotor punching 10 is provided with a plurality of magnet slots 11, and the magnet slot 11 has a first endpoint 111 and a second endpoint 112 closest to the outer edge of the rotor punching 10. Furthermore, by limiting the number Q of stator slots, the number 2P of rotor poles of the rotor punching 10, the maximum distance Ro from the outer edge of the rotor punching 10 to the center of the rotor, the minimum distance Ri from the outer edge of the rotor punching 10 to the center of the rotor, and the angle α formed by the first endpoint 111 and the second endpoint 112 and the center of the rotor, the angle β occupied by each magnetic pole on the rotor punching 10 satisfies: 0.03mm≤ ≤0.1mm,0.12≤ ≤0.15; In this way, the outer edge of the rotor punching 10 is concave, forming a non-uniform air gap, and by reasonably limiting 、 By changing the value of the magnetic field, changing its shape and position, guiding or blocking the magnetic flux path, and achieving the magnetic modulation effect, the distribution of the air gap magnetic field can be reliably optimized, the harmonic content can be reduced, the sinusoidality of the air gap magnetic field can be improved, and the torque pulsation of the motor can be reduced, thereby improving the motor efficiency and the energy efficiency of the whole machine.

[0029] Specifically, through Determine the depth of the concave portion of the outer edge of the rotor punching 10, i.e. the size of the air gap, and design the number of stator slots to optimize the motor performance. When it is greater than 0.1mm, the air gap range tends to become larger, resulting in uneven magnetic field distribution and uneven current distribution, which will not only cause torque pulsation, increase mechanical vibration and noise, reduce the operating accuracy and reliability of the motor, but also increase iron loss and copper loss, reduce motor efficiency, and worsen energy efficiency; when When the air gap is less than 0.03 mm, the air gap range is small, which limits the amplitude of adjusting the magnetic field strength, that is, the operable space for magnetic adjustment becomes smaller, which easily leads to unsatisfactory magnetic adjustment effect.

[0030] Therefore, by defining The value is between 0.03mm and 0.1mm, which can reliably control the unevenness of the air gap. It can be effectively dispersed through the reasonable distribution of the number of stator slots, reduce the local distortion of the magnetic field, reduce torque pulsation, reduce vibration and noise, and improve the running smoothness and accuracy of the motor. It can also effectively optimize the magnetic field distribution, reduce iron loss and copper loss, and improve the motor efficiency and energy efficiency.

[0031] in, The specific value of includes but is not limited to 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, and 0.1mm. However, in other embodiments, on the basis of ensuring the performance of the motor, It can be larger than 0.1mm, or smaller than 0.03mm.

[0032] The angle β occupied by each magnetic pole on the rotor punching 10 refers to the central angle occupied by each magnetic pole on the circumference of the rotor; and the line connecting the first endpoint 111 and the rotor center and the line connecting the second endpoint 112 and the rotor center form an angle α, which can determine the central angle occupied by the magnet slot 11 on the corresponding magnetic pole; It is the greatest common divisor of the number Q of designated sub-slots and the number 2P of rotor poles of the rotor punching 10, which can make the magnetic field distribution of the motor more uniform and symmetrical, thereby reducing harmonic losses and improving motor efficiency.

[0033] By designing the angles of the magnetic poles and the magnet slots 11, combined with the greatest common divisor of the number of stator slots and the number of rotor poles, the motor performance can be reasonably optimized. When the value is greater than 0.15, the magnet slot 11 will occupy most of the area of ​​the magnetic pole, resulting in uneven magnetic field distribution, which will increase the torque pulsation of the motor, reduce the motor efficiency, and weaken the mechanical strength of the magnetic pole, making it easy to deform or lose under the action of electromagnetic force and centrifugal force, thereby reducing the running stability and reliability of the motor. When it is less than 0.12, the size of the magnet slot 11 is too small, the number of magnets and the installation position are limited, and the effective area of ​​the magnetic pole is relatively too large, which can easily lead to uneven phase distribution of the magnetic field, affect the phase balance of the motor, and increase the harmonic content, thereby introducing additional losses and vibrations, and reducing the output power and efficiency of the motor.

[0034] Therefore, by defining The value of is between 0.12 and 0.15. The magnet slots 11 in the magnetic pole can reasonably distribute the magnetic field so that the magnetic field strength is evenly distributed within the magnetic pole range, which can effectively reduce torque pulsation, reduce harmonic content, reduce motor loss and noise, and thus improve motor energy efficiency and motor efficiency.

[0035] in, The specific value of includes but is not limited to 0.12, 0.13, 0.14, and 0.15. However, in other embodiments, on the basis of ensuring the performance of the motor, It can be greater than 0.15, or less than 0.12.

[0036] Optionally, in an embodiment of the present invention, 0.5mm≤Ro-Ri≤1.5mm, where Ro-Ri represents the difference between the maximum distance from the outer edge of the rotor punching 10 to the center of the rotor and the minimum distance from the outer edge of the rotor punching 10 to the center of the rotor, and can also be expressed as the radial depth of the air gap. When Ro-Ri is greater than 1.5mm, that is, the air gap is too deep, it is easy to increase the air gap magnetic resistance and reduce the air gap magnetic field strength. It is also easy to cause increased leakage magnetic flux, reduce the effective utilization rate of the magnetic field, and thus reduce the output power and efficiency of the motor; when Ro-Ri is less than 0.5mm, that is, the air gap is too shallow, the magnetic adjustment effect is not obvious, it is impossible to effectively improve the air gap magnetic field distribution or reduce the cogging torque, and it is easy to increase the cost and processing difficulty.

[0037] Therefore, limiting the Ro-Ri difference between 0.5mm and 1.5mm can effectively optimize the air gap magnetic field distribution, reduce the harmonic content, and improve the sinusoidality of the air gap magnetic field while ensuring the magnetic tuning effect, thereby reducing the cogging torque and torque pulsation, improving motor efficiency, and optimizing overall energy efficiency.

[0038] Specific values ​​of Ro-Ri include, but are not limited to, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, and 0.15mm. However, in other embodiments, based on the magnetic tuning effect, Ro-Ri may be greater than 1.5mm or less than 0.5mm.

[0039] Optionally, in an embodiment of the present invention, 23°≤α≤26°, wherein the first endpoint 111 and the second endpoint 112 are both arranged close to the outer edge of the rotor punching 10, and the distance between the first endpoint 111 and the second endpoint 112 and the rotor center is larger than that of other reference points on the magnet slot 11, and the angle occupied by the magnet slot 11 on the magnetic pole is represented by the angle α between the line connecting the first endpoint 111 and the rotor center and the line connecting the second endpoint 112 and the rotor center.

[0040] When α is greater than 26°, the larger angle α will cause the effective magnetic flux area of ​​the magnetic pole to decrease, the magnetic field distribution to be uneven, and it is easy to increase torque pulsation, increase loss and noise, increase harmonic content, and thus reduce motor efficiency and worsen energy efficiency; when α is less than 23°, the smaller angle α will limit the distribution of the magnet, resulting in uneven magnetic field distribution, which is easy to increase torque pulsation, increase loss and noise, increase harmonic content, and thus reduce motor efficiency and worsen energy efficiency.

[0041] Therefore, limiting the angle α to between 23° and 26° can ensure that the magnetic field is evenly distributed within the magnetic pole, reduce the inhomogeneity of the magnetic field, and thereby reduce torque pulsation, harmonic content, loss and noise, thereby improving motor efficiency and overall machine energy efficiency.

[0042] The specific values ​​of the angle α include but are not limited to 23°, 24°, 25°, and 26°.

[0043] Optionally, in an embodiment of the present invention, the minimum distance from the magnet slot 11 to the center of the rotor is L, and the magnet slot 11 includes two angularly arranged skewed slot sections 113, the two skewed slot sections 113 are arranged close to each other in a direction away from the outer edge of the rotor punching 10, and the angle between the two skewed slot sections 113 is γ, 16°≤ ≤19°, 12°≤β- ≤14°, and then improve the performance and efficiency of the motor by reasonably adjusting the motor parameters.

[0044] Specifically, A comprehensive parameter representing the geometrical characteristics of the magnet slot 11 and its radial position; It is the greatest common divisor of the number of designated slots Q and the number of rotor poles 2P of the rotor punching 10, and then by adjusting , which can make the magnetic field distribution of the motor more uniform and symmetrical, reduce magnetic field distortion and electromagnetic loss, control the harmonic distribution in the motor, thereby improving the motor efficiency and improving the running stability and reliability of the motor.

[0045] when When it is greater than 19°, it is easy to cause uneven magnetic field distribution, increase magnetic field distortion, and thus increase harmonic loss, reduce motor efficiency, and easily cause torque pulsation to increase, affecting the smooth operation of the motor; when When the angle is less than 16°, the magnetic field strength of the magnet slot 11 is likely to be insufficient, affecting the motor efficiency. In order to compensate for this deficiency, the number or volume of magnets needs to be increased, which will easily increase the weight and cost of the motor.

[0046] Therefore, Limiting the angle between 16° and 19°, the geometry and positional parameters of the magnet slots 11 are coordinated with the electromagnetic symmetry of the motor, resulting in a more uniform magnetic field distribution, thereby reducing magnetic field distortion and harmonic losses, thereby improving motor efficiency. This also helps optimize the motor's overall electromagnetic performance, specifically reducing torque ripple and harmonic content, thereby improving the motor's operational smoothness and reliability.

[0047] in, The specific value of includes but is not limited to 16°, 17°, 18°, and 19°. However, in other embodiments, on the basis of ensuring the performance of the motor, It can be greater than 19°, or less than 16°.

[0048] The angle β occupied by each magnetic pole on the rotor punching 10 refers to the central angle occupied by each magnetic pole on the circumference of the rotor, which can determine the spatial distribution of the rotor magnetic field. The differential design can optimize the magnetic field distribution of the motor, reduce harmonic losses and improve motor performance.

[0049] When β- When it is greater than 14°, it is easy to cause uneven magnetic field distribution, resulting in excessive local magnetic field strength, which increases losses and reduces motor efficiency. It is also easy to cause increased cogging torque, causing greater vibration and noise when the motor is running, affecting the running stability and mechanical life of the motor. When β- When the angle is less than 12°, the magnetic field distribution is likely to be too concentrated, resulting in excessive local magnetic field intensity, which increases losses and reduces motor efficiency.

[0050] Therefore, the β- Limiting the angle between 12° and 14° can avoid local stress concentration or electromagnetic force imbalance caused by extreme parameters, ensure a more uniform magnetic field distribution, help reduce cogging torque, improve the smoothness of motor operation, reduce noise and vibration during motor operation, and help reduce harmonic losses, thereby improving motor efficiency.

[0051] Among them, β- The specific value of includes but is not limited to 12°, 13°, and 14°. However, in other embodiments, on the basis of ensuring the performance of the motor, β- It can be greater than 14°, or less than 12°.

[0052] Optionally, in an embodiment of the present invention, 110°≤γ≤120°. It is understandable that the two inclined slot sections 113 are symmetrically arranged along the magnetic pole center of the rotor magnetic pole; in other embodiments, the magnet slot 11 can also be a straight slot symmetrically arranged about the magnetic pole center. When γ is greater than 120°, it is easy to cause the magnetic field to be unevenly distributed on the rotor surface, the local magnetic field strength is reduced, especially the magnetic field strength on both sides of the magnet slot 11 will be significantly reduced, and the torque pulsation will increase, affecting the efficiency and running smoothness of the motor. When γ is less than 110°, it is easy to cause the magnetic field to be too concentrated at the tip of the magnet slot 11, causing magnetic saturation and affecting the efficiency of the motor. In order to achieve the same magnetic field strength, the magnetic field needs to be placed deeper to ensure that sufficient magnetic flux can pass through the rotor, but it will cause the magnetic flux to take a longer path to reach the rotor surface, thereby increasing the magnetic resistance, resulting in increased magnetic flux loss and reduced magnetic field strength.

[0053] Therefore, by limiting the angle γ between 110° and 120°, the magnetic field is distributed more evenly on the rotor surface, which is beneficial to reducing torque pulsation, improving the smoothness of motor operation, and also helping to reduce harmonic content, reduce noise and vibration during motor operation, thereby improving the efficiency of the motor.

[0054] Among them, specific values ​​of the angle γ include but are not limited to 110°, 111°, 112°, 113°114°, 115°, 116°, 117°, 118°, 119°, and 120°.

[0055] Optionally, in an embodiment of the present invention, 0.73≤ ≤0.79, where the ratio It reflects the proportional relationship between the distance between the magnet slot 11 and the rotor center and the outer radius of the rotor punching 10, thereby limiting the position of the magnet slot 11 on the rotor punching 10 and optimizing the motor performance.

[0056] when When it is greater than 0.79, the magnet slot 11 is far away from the center of the rotor, and the magnetic field distribution is prone to unevenness, resulting in increased torque pulsation, reduced motor efficiency, and affected electromagnetic performance of the motor. In addition, the structure is relatively loose, which easily leads to insufficient overall rigidity of the motor and reduces the running stability of the motor. When it is less than 0.73, the magnet slot 11 is closer to the center of the rotor, and the magnetic field is easily over-concentrated, resulting in excessive local magnetic field intensity, causing magnetic saturation and reducing motor efficiency. In addition, the structure is too compact and easily deformed or even damaged due to stress concentration.

[0057] Therefore, When limited between 0.73 and 0.79, the magnetic field strength and distribution can achieve a better balance, thereby ensuring the efficiency and performance of the motor, and helping to reduce torque pulsation and improve the running smoothness of the motor.

[0058] in, The specific values ​​include but are not limited to 0.73, 0.74, 0.75, 0.76, 0.77, 0.78, and 0.79.

[0059] Optionally, in an embodiment of the present invention, 5≤GCD(Q, P)≤6. In this way, a relatively uniform magnetic field distribution can be ensured, while reducing harmonic losses, thereby helping to improve motor efficiency. It can also effectively reduce cogging torque, making the motor run more smoothly and reducing vibration and noise.

[0060] Optionally, in an embodiment of the present invention, 1.4≤Q / 2P≤1.6. It can be understood that tooth harmonics are generated by the interaction between stator teeth and rotor teeth. Therefore, when 1.4≤ When the ratio is ≤1.6, the interaction between the stator slots and rotor poles is more uniform, effectively reducing the generation of tooth harmonics, thereby reducing the vibration amplitude of the motor, reducing the noise generated during motor operation, and improving the motor's efficiency. At the same time, this slot-to-pole matching ratio can make the motor's air gap magnetic field more uniform. A uniform air gap magnetic field can reduce electromagnetic vibration and noise during motor operation, and also help improve the motor's power factor.

[0061] Furthermore, a reasonable slot-to-pole ratio ensures smoother torque output under varying load conditions. This allows the motor to maintain stable operation even in the presence of external magnetic interference. This is due to the optimized magnetic field distribution within the motor, which minimizes the impact of external magnetic interference on the motor's internal magnetic field.

[0062] Optionally, in an embodiment of the present invention, Q=15 and P=5, at which time the angle β occupied by each magnetic pole on the rotor punching 10 is 36°. In this way, through a reasonable slot-pole combination, the generation of tooth harmonics can be reduced; at the same time, this slot-pole combination enables a stronger magnetic field to be generated in the air gap of the motor, and then when the current passes through the motor winding, the torque generated by the interaction between the magnetic field and the current is greater, thereby improving the output torque of the motor.

[0063] Furthermore, by configuring the motor as a 15-slot, 10-pole motor, a rational design—using more slots to distribute the current—creates a more uniform magnetic field generated by the interaction of currents within each slot, reducing torque fluctuations under varying loads and speeds. Finally, this matching of stator slots and rotor poles can, to a certain extent, make the motor more compact, further contributing to its miniaturization.

[0064] Optionally, in the embodiments of the present application, two buckle holes 13 are arranged on the magnetic pole of the rotor lamination 10, and the two buckle holes 13 are arranged on opposite sides of the magnet slot 11 along the radial direction of the rotor lamination 10, wherein each rotor lamination 10 is stacked along the axial direction, and is fixed into a rotor core through the cooperation of the buckle holes 13 and the corresponding fastening structure, as shown in the figure. Figure 1 When each magnetic pole is provided with two buckle holes 13, and the two buckle holes 13 are arranged on opposite sides of the magnet slot 11 along the radial direction of the rotor lamination 10, that is, one buckle hole 13 is arranged on the inner side of the magnet slot 11, and the other buckle hole 13 is arranged on the outer side of the magnet slot 11, the overall connection strength and stability of the rotor core can be enhanced, and the magnet and the rotor core can be more closely combined together, thereby reducing the air gap between the magnet and the rotor core, the rotor laminations 10, and reducing the eddy current loss and magnetic flux leakage, thereby improving the motor efficiency. The inner side of the magnet slot 11 refers to the side of the magnet slot 11 facing the center of the rotor lamination 10, and the outer side of the magnet slot 11 refers to the side of the magnet slot 11 facing the outer edge of the rotor lamination 10. However, the design is not limited to this, and in other embodiments, only the buckle holes 13 are arranged on the inner side or the outer side of the magnet slot 11, and the number of buckle holes 13 can be set according to specific requirements, and can be one or more.

[0065] Optionally, in the embodiments of the present application, the rotor lamination 10 is provided with an axis hole 12 concentric with the rotation center of the rotor, and the diameter of the axis hole 12 is D, 19mm≤D≤22mm, so that by reasonably controlling the size of the axis hole 12, the structural design of the motor is optimized, and the operating efficiency and stability of the motor are improved, so that the displacement of the motor meets the design expectation while meeting the power requirement of the motor.

[0066] It can be understood that by limiting the diameter of the axis hole 12 to between 19mm and 22mm, the rotor and the shaft are well matched, which can effectively reduce energy loss, especially reduce vibration and additional friction loss during operation, thereby improving the efficiency and operating stability of the motor, and also helping the rotor lamination 10 and the stator magnetic field to better interact with each other, improving the electromagnetic performance of the motor, and improving the power of the motor.

[0067] Further, the good matching of the rotor and the shaft can ensure the performance and operating stability of the motor, and thus ensure the smooth operation of the piston of the compressor, thereby ensuring the stable displacement of the compressor.

[0068] The present application also provides a compressor comprising a motor, and the specific structure of the motor refers to the above-mentioned embodiments. Since the compressor adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0069] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since this refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0070] Specifically, the refrigeration equipment includes a compressor and a liquid accumulator. The motor can provide power to the compressor so that it can operate normally. The high-temperature and high-pressure refrigerant gas discharged by the compressor is cooled by the condenser and becomes liquid, and then flows into the liquid accumulator for storage. The liquid accumulator can also filter impurities in the refrigerant to prevent impurities from entering the evaporator.

[0071] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: A stator is provided with a plurality of stator slots, the number of the stator slots being Q; a rotor disposed inside the stator, the rotor comprising a plurality of rotor punchings stacked along its axial direction, the rotor punchings having a plurality of magnet slots distributed along its circumference; The number of rotor poles of the rotor punching is 2P, the maximum distance from the outer edge of the rotor punching to the center of the rotor is Ro, the minimum distance from the outer edge of the rotor punching to the center of the rotor is Ri, the magnet slot has a first end point and a second end point closest to the outer edge of the rotor punching, the angle between the first end point and the second end point and the center of the rotor is α, the angle occupied by each magnetic pole on the rotor punching is β, 0.03mm≤ ≤0.1mm,0.12≤ ≤0.

15.

2. The motor according to claim 1, wherein 0.5mm≤Ro-Ri≤1.5mm.

3. The motor according to claim 1, wherein 23°≤α≤26°。 4. The motor according to claim 1, wherein The minimum distance from the magnet slot to the center of the rotor is L. The magnet slot includes two inclined slot sections arranged at an angle. The two inclined slot sections are arranged close to each other in the direction away from the outer edge of the rotor punching. The angle between the two inclined slot sections is γ, 16°≤ ≤19°, 12°≤β- ≤14°.

5. The motor according to claim 4, characterized in that 110°≤γ≤120°.

6. The motor according to claim 4, characterized in that 0.73≤ ≤0.79。 7. The motor according to claim 1, wherein 5≤GCD(Q,P)≤6.

8. The motor according to claim 1, wherein 1.4≤Q / 2P≤1.

6.

9. The motor according to claim 1, wherein Q=15, and P=5.

10. The motor according to claim 1, wherein Two buckle holes are provided on the magnetic pole of the rotor punching sheet, and the two buckle holes are respectively arranged on opposite sides of the magnet slot along the radial direction of the rotor punching sheet.

11. The electric machine according to any one of claims 1 to 10, characterized in that The rotor punching is provided with an axial hole concentric with the rotation center of the rotor, and the diameter of the axial hole is D, 19mm≤D≤22mm.

12. A compressor, characterized in that: The method comprises the motor according to any one of claims 1 to 11.

13. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 12.

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