Motor, compressor and refrigeration equipment

Abstract

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the number of poles of a rotor is 2P, the number of stator slots is Q, the longest distance between the slot bottom of a first magnetic adjusting slot and the circle center of a stator punching sheet is Ls, and the minimum inner diameter of the stator punching sheet is Di, the included angle between the connecting line of the point A and the circle center of the stator punching sheet and the center line in the length direction of the stator tooth is alpha, the two farthest end points of the tooth boot part along the circumferential direction of the stator punching sheet are respectively a point B and a point C, the included angle between the connecting line of the point B and the circle center of the stator punching sheet and the connecting line of the point C and the circle center of the stator punching sheet is beta, 0 degree < = 1.27 degrees, and 0 mm < = 0.2 mm. According to the technical scheme provided by the invention, the torque ripple of the motor is reduced, the noise of the motor is reduced, and the energy efficiency of the motor is improved.

Description

Technical Field

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

[0002] With the rapid economic development and improved living standards, miniaturization, high efficiency, and low noise are increasingly becoming the demands of compressor manufacturers. In related technologies, air gap magnetic flux harmonics in motors cause significant vibration, resulting in high noise levels and, consequently, low 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 reduce the torque pulsation of the motor, reduce the noise of the motor and improve the energy efficiency of the motor.

[0004] To achieve the above-mentioned object, the motor proposed in the present invention includes: a rotor having a pole number of 2P; and The stator comprises a plurality of stacked stator sheets, each of which comprises a stator yoke, a plurality of stator teeth, and a plurality of tooth boots. The stator sheet is provided with a stator slot, and each tooth boot is provided with two first magnetic tuning slots on a side away from the stator tooth. The two first magnetic tuning slots are symmetrically arranged along the center line of the corresponding stator tooth in the length direction. The number of the stator slots is Q, the longest distance between the bottom of the first magnetic tuning slot and the center of the stator sheet is Ls, the minimum inner diameter of the stator sheet is Di, the farthest point on the wall of the first magnetic tuning slot from the center line in the length direction of the stator tooth is point A, and the angle between the line connecting point A and the center of the stator sheet and the center line in the length direction of the stator tooth is α. The two farthest points of the tooth boot on both sides of the circumferential direction of the stator sheet are points B and C respectively. The angle between the line connecting point B and the center of the stator sheet and the line connecting point C and the center of the stator sheet is β, 0°≤ ≤1.27°,0mm≤ ≤0.2mm.

[0005] In one embodiment, the rotor includes a plurality of stacked rotor punchings, and the rotor punchings are provided with a plurality of groups of second magnetic adjustment grooves and a plurality of groups of magnetic cylinder grooves. A group of the magnetic cylinder grooves corresponds to a group of the second magnetic adjustment grooves, and a group of the second magnetic adjustment grooves is provided with two. The two second magnetic adjustment grooves in the same group are symmetrically arranged along the center line of the corresponding group of the magnetic cylinder grooves. The shortest distance between the two second magnetic adjustment grooves in the same group is Lr, the straight-line distance between the point B and the point C is Lt, and 0.2 mm ≤ ≤0.9mm.

[0006] In one embodiment, 6 mm ≤ Lt ≤ 16 mm, and 2.5 mm ≤ Lr ≤ 3 mm.

[0007] In one embodiment, 0 mm ≤ i≤1mm.

[0008] In one embodiment, 1.5°≤α≤12°, and 10°≤β≤24°.

[0009] In one embodiment, 5≤ ≤6.

[0010] In one embodiment, , 5≤P≤6, 12≤Q≤18.

[0011] In one embodiment, Q=15 and P=5.

[0012] In one embodiment, the minimum inner diameter of the rotor is Dx, 19 .

[0013] The present invention also provides a compressor comprising the motor as described above.

[0014] In one embodiment, the compressor further includes a cylinder, which is transmission-connected to the motor, and the number of the cylinders is y, where 2≤y≤3.

[0015] The present invention also provides a refrigeration device comprising the compressor as described above.

[0016] In the technical solution of the present invention, α, β, Q, P, Ls and Di are limited to 0°≤ ≤1.27°,0mm≤ ≤0.2mm, thereby reducing the noise of the motor, reducing the torque ripple of the motor, reducing the harmonic content of the magnetic field, reducing iron loss, and thus improving the energy efficiency of the motor. It represents the deviation angle of the first magnetic tuning slot relative to the center line of the stator tooth length direction. Therefore, if >1.27°, it means that α is too small relative to β, which means that the farthest point A of the first magnetic tuning slot is too close to the center line of the stator tooth length direction, which means that the slot width of the first magnetic tuning slot is too small, which means that the first magnetic tuning slot is too small, which means that the effect of the first magnetic tuning slot on weakening the cogging torque and torque ripple will become worse, increasing the torque ripple. Therefore, by 0°≤ ≤1.27°, so that the first magnetic tuning slot optimizes the air gap magnetic permeability of the motor, weakens the cogging torque and torque ripple, reduces the torque ripple of the motor, and improves the energy efficiency of the motor. represents the greatest common divisor of Q and 2P, Indicates the limitation of the first magnetic tuning slot depth in different slot pole motors. If >0.2mm, it means that Ls is too large relative to 0.5Di, that is, the slot depth of the first magnetic tuning slot is too large. A first magnetic tuning slot that is too deep will significantly increase the effective air gap length, weaken the main magnetic flux, and the magnetic flux density near the slot mouth and the slot bottom may change more violently, thereby increasing the iron loss of the motor; at the same time, a first magnetic tuning slot that is too deep may modulate the air gap magnetic permeability too strongly. Although it may suppress the force wave of the target order, it may excite or enhance other non-target order harmonics, thereby causing torque pulsation excitation noise. Therefore, by setting 0mm≤ ≤0.2mm, thereby optimizing the air gap magnetic permeability of the motor, reducing the noise of the motor, reducing the iron loss of the motor, and improving the energy efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic structural diagram of a stator in a motor provided by the present invention; Figure 2 A schematic structural diagram of a rotor in a motor provided by the present invention; Figure 3 The present invention provides different Low-frequency load torque pulsation trend chart of the value; Figure 4 The present invention provides different Torque ripple excitation noise trend chart of the value; Figure 5 The present invention provides different Back EMF THD trend chart of the value.

[0019] Description of Figure Numbers: 10. Stator; 11. Stator yoke; 12. Stator teeth; 13. Tooth shoe; 131. First magnetic adjustment slot; 14. Stator slot; 20. Rotor; 21. Magnetic cylinder slot; 22. Second magnetic adjustment slot.

[0020] 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

[0021] 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.

[0022] 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 components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0023] 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.

[0024] Reference Figure 1 and Figure 2 The present invention provides a motor, comprising: a rotor 20 having a pole number of 2P; and The stator 10 includes a plurality of stacked stator punchings, each of which includes a stator yoke 11, a plurality of stator teeth 12, and a plurality of tooth boots 13. The stator punching is provided with a stator slot 14. Each tooth boot 13 is provided with two first magnetic tuning slots 131 on the side away from the stator tooth 12. The two first magnetic tuning slots 131 are symmetrically arranged along the center line of the corresponding stator tooth 12 in the longitudinal direction. The number of the stator slots 14 is Q, and the bottom of the first magnetic tuning slot 131 is at the maximum of the center of the stator punching. The longest distance is Ls, the minimum inner diameter of the stator punching is Di, the farthest point on the wall of the first magnetic tuning slot 131 from the center line of the length direction of the stator tooth 12 is point A, and the angle between the line connecting point A and the center of the stator punching circle and the center line of the length direction of the stator tooth 12 is α. The two farthest end points of the tooth shoe 13 on both sides of the circumferential direction of the stator punching are point B and point C respectively. The angle between the line connecting point B and the center of the stator punching circle and the line connecting point C and the center of the stator punching circle is β, 0°≤ ≤1.27°,0mm≤ ≤0.2mm.

[0025] In the technical solution of the present invention, α, β, Q, P, Ls and Di are limited to 0°≤ ≤1.27°,0mm≤ ≤0.2mm, thereby reducing the noise of the motor, reducing the torque ripple of the motor, reducing the harmonic content of the magnetic field, reducing iron loss, and thus improving the energy efficiency of the motor. Indicates the deviation angle of the first magnetic tuning slot 131 relative to the center line of the stator tooth 12 in the longitudinal direction, refer to Figure 3 , therefore, if >1.27°, it means that α is too small relative to β, which means that the farthest point A of the first magnetic tuning slot 131 is too close to the center line of the length direction of the stator tooth 12, which means that the slot width of the first magnetic tuning slot 131 is too small, which means that the first magnetic tuning slot 131 is too small, which means that the effect of the first magnetic tuning slot 131 on weakening the cogging torque and torque ripple will be reduced, and the torque ripple will be increased. Therefore, by 0°≤ ≤1.27°, so that the first magnetic tuning slot 131 optimizes the air gap magnetic permeability of the motor, weakens the cogging torque and torque ripple, reduces the torque ripple of the motor, and improves the energy efficiency of the motor. represents the greatest common divisor of Q and 2P, Indicates the limitation of the slot depth of the first magnetic adjustment slot 131 in different slot pole motors, refer to Figure 4 ,like >0.2mm, it means that Ls is too large relative to 0.5Di, that is, the slot depth of the first magnetic tuning slot 131 is too large. A first magnetic tuning slot 131 that is too deep will significantly increase the effective air gap length, weaken the main magnetic flux, and the magnetic density near the slot mouth and the slot bottom may change more violently, thereby increasing the iron loss of the motor; at the same time, a first magnetic tuning slot 131 that is too deep may modulate the air gap magnetic permeability too strongly. Although it may suppress the force wave of the target order, it may excite or enhance other non-target order harmonics, thereby causing torque pulsation excitation noise. Therefore, by setting 0mm≤ The range of ≤0.2mm optimizes the air gap permeability of the motor, reduces the noise of the motor, reduces the iron loss of the motor, and improves the energy efficiency of the motor. The units of α and β are degrees, and the units of Ls and Di are millimeters.

[0026] Among them, the measurement method of α is: draw the center line of the length direction of the stator tooth 12, select one or more areas of the first magnetic adjustment slot 131 farthest from the center line, and then select multiple points in these one or more areas, and then measure the distance N between these multiple points and the center line respectively, where the point with the largest N value is point A, draw a line between point A and the center of the stator punching circle, and finally measure the angle between the line and the center line by an angle measuring device, which is α. At the same time, it should be noted that the points selected each time may be different, so the N value measured each time is different, but these points are all point A. As long as the point in the farthest area of ​​the first magnetic adjustment slot 131 is selected, the error is within a reasonable range and does not affect the final result of this application.

[0027] The measurement method of β is: draw a line connecting point B and the center of the stator punching circle, and a line connecting point C and the center of the stator punching circle, and then use an angle measuring device to measure the angle between the two lines, which is β.

[0028] The measurement method of Ls is as follows: select one or more deepest areas of the first magnetic adjustment slot 131, then select multiple points in each of these one or more areas, and then measure the distance N between these multiple points and the center of the stator punching circle. The one with the smallest N value is Ls. At the same time, it should be noted that the points selected each time may be different, so the Ls value measured each time may be different, but these values ​​are all Ls. As long as the point in the deepest area of ​​the first magnetic adjustment slot 131 is selected, the error is within a reasonable range and does not affect the calculation formula of this application. The deepest area can be obtained by rough measurement or visual inspection.

[0029] Di is measured as follows: draw a straight line through the center of the rotor 20 punching circle. The two intersection points of this straight line and the wall surface of the tooth shoe 13 facing away from the stator tooth 12 are E and F. This straight line and its extension cannot pass through the first magnetic tuning slot 131 or other slot structures on the side of the tooth shoe 13 facing away from the stator tooth 12. The distance between points E and F is Di.

[0030] Furthermore, the rotor 20 includes a plurality of stacked rotor 20 punchings, and the rotor 20 punchings are provided with a plurality of groups of second magnetic adjustment grooves 22 and a plurality of groups of magnetic cylinder grooves 21. A group of the magnetic cylinder grooves 21 is provided corresponding to a group of the second magnetic adjustment grooves 22. A group of the second magnetic adjustment grooves 22 is provided with two. The two second magnetic adjustment grooves 22 of the same group are symmetrically arranged along the center line of the corresponding group of the magnetic cylinder grooves 21. The shortest distance between the two second magnetic adjustment grooves 22 of the same group is Lr, the straight-line distance between the point B and the point C is Lt, and 0.2 mm ≤ ≤0.9mm.

[0031] Reference Figure 5 ,in, The average width of the stator tooth 12 shoe corresponding to each stator slot 14 exceeds the width of the rotor 20 magnetic pole key magnetic bridge. >0.9mm, which means that Lt is too large relative to Lr, that is, there are two situations. One is that Lt is too large. The overly wide stator tooth 12 boot may cause the magnetic density itself or near the tooth root to be too high, causing local core saturation, increasing iron loss, reducing efficiency, causing heat, and causing the motor's back electromotive force to be too large. The other is that Lr is too small, which means that the magnetic bridge of the rotor 20 is too narrow, and the overly wide stator tooth 12 boot attempts to force a large amount of magnetic flux through this narrow bottleneck, which will greatly aggravate the saturation of the rotor 20 magnetic bridge; this will not only greatly increase iron loss and heat, but also significantly weaken the main magnetic flux, reducing torque output and power density. Severe saturation will also distort the air gap magnetic field, which will lead to excessive back electromotive force of the motor. And if Lr is too small, the magnetic bridge between two adjacent second magnetic adjustment slots 22 will be too small, thereby reducing the structural strength of the rotor 20 punching and increasing the risk of the rotor 20 punching breaking during high-speed operation.

[0032] like <0.2mm, it means that Lt is close to Lr, which means that Lt is too small or Lr is too large. The too narrow stator tooth 12 boots make it impossible to effectively collect or guide the air gap flux, resulting in part of the flux failing to effectively participate in energy conversion, which is equivalent to increasing the effective magnetic resistance of the magnetic circuit, which will reduce the torque density, power factor and efficiency of the motor. The role of the rotor 20 magnetic tuning slot depends on forming a controllable magnetic circuit bottleneck on the pole surface to modulate the magnetic permeance. If the magnetic bridge is too wide (that is, Lr is too large), its ability to weaken specific harmonics will be greatly weakened, because the magnetic circuit bottleneck is not obvious and the magnetic permeance distribution cannot be effectively changed, which will also cause the back electromotive force of the motor to be too large. Therefore, by 0.2mm≤ ≤0.9mm, thereby modulating the air gap permeability and weakening the cogging torque, torque ripple, and electromagnetic force waves of a specific order. This helps to obtain a smoother sine wave or the required specific waveform, reduces harmonic content, and thus reduces the back electromotive force of the motor. The units of Lt and Lr are millimeters (mm).

[0033] The method for measuring Lt is to select the area with the shortest distance between two second magnetic adjustment slots 22 in the same group, then find multiple points within this area of ​​the two second magnetic adjustment slots 22, and then measure the distance between the two points. The distance between the two points with the shortest distance is Lt. It should be noted that the points selected each time may be different, so the Lt value measured each time may be different. However, these values ​​are all Lt. As long as the point in the area with the shortest distance between the second magnetic adjustment slots 22 is selected, the error is within a reasonable range and does not affect the calculation formula of this application. The shortest area can be obtained by rough measurement or visual inspection.

[0034] The measurement method of Lr is: directly measure the distance between point B and point C using a straight line measuring tool, which is Lr.

[0035] Specifically, 6mm≤Lt≤16mm, 2.5mm≤Lr≤3mm. This optimizes the harmonic regulation capabilities of the stator 10 and the rotor 20, reduces the torque pulsation of the motor, reduces the noise of the motor, and improves the energy efficiency of the motor.

[0036] Furthermore, 0mm≤ i≤1mm. Among them, i represents the limitation of the depth of the first magnetic tuning slot 131. If i>1mm, it means that Ls is too large relative to Di, that is, the slot depth of the first magnetic tuning slot 131 is too large. The excessively deep first magnetic tuning slot 131 will significantly increase the effective air gap length and weaken the main magnetic flux. The magnetic flux density near the slot mouth and the bottom of the slot may change more dramatically, thereby increasing the iron loss of the motor, increasing the torque pulsation of the motor, increasing the noise of the motor, and thus reducing the energy efficiency of the motor. i=0mm, it can be understood that the first magnetic tuning slot 131 is not provided on the side of the tooth shoe 13 away from the stator tooth 12; of course, it can also be understood that the entire side wall of the tooth shoe 13 away from the stator tooth 12 is the first magnetic tuning slot 131. Therefore, by setting 0mm≤ i≤1mm is set within a reasonable range, thereby optimizing the air gap magnetic permeability of the motor, reducing the torque pulsation of the motor, reducing the noise of the motor, reducing the iron loss of the motor, and improving the energy efficiency of the motor.

[0037] Specifically, 1.5°≤α≤12°, 10°≤β≤24°. Among them, 1.5°≤α≤12°, thereby enhancing the modulation ability of the magnetic tuning slot on the air gap magnetic permeance space harmonics, enabling it to more effectively "cut" or "twist" the magnetic lines of force passing through the tooth shoe portion 13, generating harmonics of a specific order required by the design, to offset or weaken the main torque pulsation and tooth slot torque harmonic components caused by the stator 10 slots and the rotor 20 poles. At the same time, it prevents the first magnetic tuning slot 131 from excessively extending to both sides of the tooth shoe portion 13 in the width direction, thereby increasing the mechanical strength of the tooth shoe portion 13 and reducing the risk of deformation or fracture under the action of electromagnetic force. Among them, 10°≤β≤24° ensures that the tooth shoe portion 13 has sufficient cross-sectional area to carry the main magnetic flux transmitted from the stator teeth 12, avoids the tooth shoe itself from becoming a bottleneck of the magnetic circuit, prevents it from saturating prematurely, and helps to support a smoother air gap magnetic flux distribution.

[0038] In one embodiment, 5≤ ≤6. This reduces cogging torque, making the motor run smoother and reducing vibration and noise. Furthermore, the closer the back EMF waveform is to a sinusoidal state, the better the motor's control performance and the smaller the torque ripple, thus reducing torque ripple. Furthermore, the reduction of spatial harmonics, especially low-order harmonics, directly contributes to the sinusoidalization of the back EMF waveform. Finally, spatial harmonics generate additional iron losses in the core. By reducing low-order harmonics, these additional losses can be effectively suppressed, thereby reducing the motor's iron losses and improving its efficiency.

[0039] Specifically, , 5≤P≤6, 12≤Q≤18. Tooth harmonics are generated by the interaction between the stator yoke 11 and the rotor 20. Therefore, when , 5≤P≤6, 12≤Q≤18, the interaction between the stator slot 14 and the rotor 20 is more uniform, which can effectively reduce the generation of tooth harmonics, thereby reducing the vibration amplitude of the motor, reducing the noise generated by the motor, and improving the efficiency of the motor. At the same time, this slot-pole matching ratio can make the air gap magnetic field of the motor more uniform. A uniform air gap magnetic field can reduce electromagnetic vibration and noise during the operation of the motor, and is also beneficial to improving the power factor of the motor. Furthermore, a reasonable slot-pole matching ratio can make the torque output of the motor more stable under different load conditions. Furthermore, this slot-pole matching ratio enables the motor to better maintain its own stable operation when facing external interference magnetic fields; because the internal magnetic field distribution of the motor is optimized, the impact of external magnetic field interference on the internal magnetic field of the motor is relatively small.

[0040] Specifically, Q=15, P=5. By rationally selecting the 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. When current passes through the motor windings, the torque generated by the interaction between the magnetic field and the current is greater, thereby increasing the output torque of the motor. Furthermore, through reasonable design, the 15-slot, 10-pole motor reduces the torque fluctuation of the motor under different loads and speeds, because there are more slots to distribute the current, and the magnetic field generated by the interaction of the current in each slot is more uniform. Finally, this combination of 14 stator slots and 20 rotor poles can make the size of the motor more compact to a certain extent, which is conducive to the miniaturization of the motor.

[0041] Specifically, the minimum inner diameter of the rotor 20 is Dx, 19 . This optimizes the air gap length and magnetic field distribution of the motor. A smaller air gap length can reduce magnetic resistance, thereby improving the efficiency of the motor. The rotor 20 punchings with an inner diameter ranging from 19mm to 22mm can provide sufficient space for the heat dissipation channel inside the motor without increasing the complexity of the heat dissipation path due to excessive size. The rotor 20 punchings with an inner diameter ranging from 19mm to 22mm can also reduce electromagnetic vibration and mechanical vibration during motor operation, thereby reducing noise and improving the energy efficiency of the motor; at the same time, the motor can achieve higher power output in a limited space, thereby improving the energy efficiency of the motor.

[0042] The measurement method of Dx is: draw a straight line through the center of the rotor 20 punching circle, and the two intersection points of this straight line with the inner circumferential wall of the rotor 20 punching are E and F. The straight line and its extension line cannot pass through the groove structure of the inner circumferential wall of the rotor 20 punching. The distance between point E and point F is Dx.

[0043] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above embodiments. Since the compressor of the present invention adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments.

[0044] Furthermore, the compressor further includes cylinders, which are transmission-connected to the motor, and the number of cylinders is y, where 2≤y≤3. The motor in the technical solution of the present invention is applied to a two-cylinder or three-cylinder compressor. Through sophisticated phase design and the inherent dynamic balance characteristics of the multi-cylinder system, the source of vibration is fundamentally suppressed; load superposition is used to smooth the torque input, protecting and releasing the high efficiency and low noise potential of the motor; the continuity of gas flow and system efficiency are improved by superimposing the intake and exhaust processes; and compact and efficient electromechanical integration is achieved in terms of space utilization.

[0045] 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 the refrigeration device of the present invention adopts all the technical solutions of all 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.

[0046] 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 rotor having a pole number of 2P; and The stator comprises a plurality of stacked stator sheets, each of which comprises a stator yoke, a plurality of stator teeth, and a plurality of tooth boots. The stator sheet is provided with a stator slot, and each tooth boot is provided with two first magnetic tuning slots on a side away from the stator tooth. The two first magnetic tuning slots are symmetrically arranged along the center line of the corresponding stator tooth in the length direction. The number of the stator slots is Q, the longest distance between the bottom of the first magnetic tuning slot and the center of the stator sheet is Ls, the minimum inner diameter of the stator sheet is Di, the farthest point on the wall of the first magnetic tuning slot from the center line in the length direction of the stator tooth is point A, and the angle between the line connecting point A and the center of the stator sheet and the center line in the length direction of the stator tooth is α. The two farthest points of the tooth boot on both sides of the circumferential direction of the stator sheet are points B and C respectively. The angle between the line connecting point B and the center of the stator sheet and the line connecting point C and the center of the stator sheet is β, 0°≤ ≤1.27°,0mm≤ ≤0.2mm.

2. The motor according to claim 1, wherein The rotor includes a plurality of stacked rotor punchings, and the rotor punchings are provided with a plurality of groups of second magnetic adjustment grooves and a plurality of groups of magnetic cylinder grooves. A group of the magnetic cylinder grooves corresponds to a group of the second magnetic adjustment grooves, and a group of the second magnetic adjustment grooves is provided with two. The two second magnetic adjustment grooves in the same group are symmetrically arranged along the center line of the corresponding group of the magnetic cylinder grooves. The shortest distance between the two second magnetic adjustment grooves in the same group is Lr, and the straight-line distance between the B point and the C point is Lt, 0.2 mm≤ ≤0.9mm.

3. The motor according to claim 2, characterized in that 6mm≤Lt≤16mm, 2.5mm≤Lr≤3mm.

4. The motor according to claim 1, wherein 0mm≤ i≤1mm。 5. The motor according to claim 1, wherein 1.5°≤α≤12°，10°≤β≤24°。 6. The motor according to claim 1, wherein 5≤ ≤6。 7. The motor according to claim 1, wherein ,5≤P≤6,12≤Q≤18。 8. The motor according to claim 1, wherein Q=15, P=5.

9. The motor according to claim 1, wherein The minimum inner diameter of the rotor is Dx, 19 .

10. A compressor, characterized in that: Comprising a motor as claimed in any one of claims 1 to 9.

11. The compressor according to claim 10, wherein The compressor further includes a cylinder, which is transmission-connected to the motor. The number of the cylinders is y, where 2≤y≤3.

12. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 10 or 11.

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