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, two end points on the bottom wall of the same magnetism adjusting groove are respectively a point C and a point D, the arc length of the shortest arc between the point C and the point D and taking the circle center of a rotor punching sheet as the circle center is Sr, the number of poles of a rotor is 2P, the included angle between the first groove wall and the center line of the magnetic steel groove of the corresponding group is alpha, the average angle number of each pole of the rotor is beta, the two end points of the two ends of the side wall of the side, facing the air gap, of the tooth shoe part are a point A and a point B respectively, the arc length of the shortest arc, with the circle center of the stator as the circle center, between the point A and the point B is St, 1.28 mm < = 1.56 mm, and 0.4 degree < = 1.56 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 compressors. In related technologies, air gap magnetic flux harmonics in motors cause significant motor 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 stator, the stator comprising a stator yoke, stator teeth and tooth shoes, the stator punching being provided with stator slots, the number of the stator slots being Q; and A rotor, wherein an air gap is formed between the rotor and the stator, the rotor comprising a plurality of stacked rotor punchings, wherein a plurality of groups of magnetic steel slots are provided in the rotor punchings, and a plurality of magnetic adjustment slots are provided at intervals on the outer peripheral wall of the rotor punchings, wherein a group of the magnetic steel slots corresponds to at least one magnetic adjustment slot, and the two endpoints on the bottom wall of the same magnetic adjustment slot are points C and D, respectively, and the arc length of the shortest arc between points C and D and centered on the center of the rotor punching is Sr. The number of poles of the rotor is 2P, and the slot wall of the magnetic adjustment slot on the side close to the center line of the magnetic steel slot of the corresponding group is a first slot wall, and the extension line of the first slot wall passes through the center of the rotor. The angle between the first slot wall and the center line of the magnetic steel slot of the corresponding group is α, and the average angle occupied by each pole of the rotor is β. The two endpoints of the side wall of the tooth shoe facing the air gap are points A and B, respectively, and the arc length of the shortest arc between points A and B and centered on the center of the stator is St, 1.28 mm≤ ≤1.56mm, 0.4°≤ .

[0005] In one embodiment, the shortest distance between the magnetic tuning slot and the center of the rotor is L, the maximum outer diameter of the rotor punching is Dr, 0.06 mm ≤ ≤0.11mm.

[0006] In one embodiment, .

[0007] In one embodiment, the minimum inner diameter of the rotor punching is Dx, 19 mm ≤ Dx ≤ 22 mm.

[0008] In one embodiment, the maximum outer diameter of the rotor punching is Dr, 2.2 mm ≤ ≤2.4mm.

[0009] In one embodiment, 1.4≤ ≤1.6.

[0010] In one embodiment, Q=15 and P=5.

[0011] In one embodiment, the magnetic tuning slot is located on one side of the center line of the magnetic steel slot of the corresponding group in the clockwise direction; and / or The magnetic tuning slot is located on one side of the center line of the magnetic steel slot of the corresponding group in the counterclockwise direction.

[0012] The present invention also provides a compressor comprising the motor as described above.

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

[0014] In the technical solution of the present invention, St, Sr, α and β are limited to 1.28 mm ≤ ≤1.56mm, 0.4°≤ range, 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. represents the greatest common divisor of Q and 2P, It represents the difference between the arc length of the tooth shoe facing the rotor side and the arc length of the rotor magnetic tuning slot bottom, so It represents the difference between the arc length of the stator tooth shoe and the arc length of the rotor magnetic slot bottom under different specifications of motors. Therefore, if >1.56mm, it means that St is much larger than Sr, which makes the air gap magnetic flux waveform seriously distorted at the tooth shoe, causing local magnetic saturation of the motor and increased iron loss, thereby increasing the torque ripple of the motor and significantly increasing the noise; and if <1.28mm, it means that the St and Sr values ​​are close, so that the magnetic tuning slot cannot fully adjust the magnetic field, that is, it cannot adjust the harmonic content of the magnetic field in the motor. ≤1.56mm, thereby reducing the torque pulsation of the motor, reducing the noise of the motor, reducing the harmonic content of the magnetic field, reducing iron loss, and improving the energy efficiency of the motor. Indicates the deviation angle of the magnetic slot relative to the center line of each pole of the rotor under different specifications of motors. >0.7°, it means that the magnetic adjustment slot α is too small, which will cause the magnetic adjustment slot to deviate too much from the center line position of the magnetic steel slot, thereby weakening the magnetic flux modulation effect of the magnetic adjustment slot, increasing torque pulsation, and thus increasing the noise of the motor, and easily leading to local over-saturation of the magnetic field. If the angle is less than 0.4°, it means that the magnetic adjustment slot is too close to the center line of the corresponding magnetic steel slot, which increases the machining accuracy of the magnetic adjustment slot and the production cost of the motor. On the other hand, it also reduces the magnetic flux density of the motor, reduces the output torque of the motor, and thus reduces the energy efficiency of the motor. Therefore, by setting the angle of 0.4°≤ , thereby reducing the machining accuracy of the magnetic tuning slot while improving the magnetic field adjustment effect of the magnetic tuning slot and improving the energy efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 A schematic structural diagram of an embodiment of a motor provided by the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle Z position; Figure 3 for Figure 1 Schematic diagram of the structure of the middle rotor; Figure 4 for Figure 1 Comparison of torque pulsation of the motor in different implementations and the prior art solution.

[0017] Description of Figure Numbers: 10. Stator; 11. Stator yoke; 12. Stator teeth; 13. Tooth boot; 14. Stator slot; 20. Rotor; 21. Magnetic steel slot; 22. Magnetic adjustment slot; 221. First slot wall; 30. Air gap.

[0018] 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

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Reference Figures 1 to 3 The present invention provides a motor, comprising: A stator 10, comprising a stator yoke 11, stator teeth 12, and tooth boots 13. Stator slots 14 are provided in the stamping sheets of the stator 10, and the number of slots of the stator slots 14 is Q; and The rotor 20 has an air gap 30 formed between it and the stator 10. The rotor 20 includes a plurality of stacked rotor punchings, a plurality of groups of magnetic steel slots 21 are provided in the rotor punchings, and a plurality of magnetic adjustment slots 22 are provided on the outer peripheral wall of the rotor punchings. A group of magnetic steel slots 21 corresponds to at least one magnetic adjustment slot 22. The two endpoints on the bottom wall of the same magnetic adjustment slot 22 are respectively point C and point D. The arc length of the shortest arc between point C and point D and with the center of the rotor punching as the center is Sr. The number of poles of the rotor 20 is 2P. The magnetic adjustment slots 22 are arranged at intervals. The slot wall of the slot 22 close to the center line of the magnetic steel slot 21 of the corresponding group is the first slot wall 221. The extension line of the first slot wall 221 passes through the center of the rotor 20. The angle between the first slot wall 221 and the center line of the magnetic steel slot 21 of the corresponding group is α. The average angle occupied by each pole of the rotor 20 is β. The two endpoints of the side wall of the tooth shoe portion 13 facing the air gap 30 are point A and point B respectively. The arc length of the shortest arc between point A and point B and with the center of the stator 10 as the center is St, 1.28 mm ≤ ≤1.56mm, 0.4°≤ .

[0023] In the technical solution of the present invention, St, Sr, α and β are limited to 1.28 mm ≤ ≤1.56mm, 0.4°≤ range, 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. represents the greatest common divisor of Q and 2P, It represents the difference between the arc length of the tooth shoe portion 13 toward the rotor 20 and the arc length of the bottom of the magnetic adjustment slot 22 of the rotor 20. It represents the difference between the arc length of the tooth shoe portion 13 facing the rotor 20 side and the arc length of the bottom of the magnetic adjustment slot 22 of the rotor 20 under different specifications of motors. Therefore, if >1.56mm, it means that St is much larger than Sr, which makes the air gap magnetic flux waveform seriously distorted at the tooth shoe, causing local magnetic saturation of the motor and increased iron loss, thereby increasing the torque ripple of the motor and significantly increasing the noise; and if <1.28mm, it means that the St and Sr values ​​are close, so that the magnetic adjustment slot 22 cannot fully adjust the magnetic field, that is, it cannot adjust the harmonic content of the magnetic field in the motor. ≤1.56mm, thereby reducing the torque pulsation of the motor, reducing the noise of the motor, reducing the harmonic content of the magnetic field, reducing iron loss, and improving the energy efficiency of the motor. Indicates the deviation angle of the magnetic adjustment slot 22 relative to the center line of each pole of the rotor 20 under different specifications of motors. >0.7°, it means that the magnetic adjustment slot 22α is too small, which will cause the magnetic adjustment slot 22 to deviate too much from the center line position of the magnetic steel slot 21, thereby weakening the magnetic flux modulation effect of the magnetic adjustment slot 22, increasing the torque pulsation, and thus increasing the noise of the motor, and easily leading to local oversaturation of the magnetic field. <0.4°, it means that the magnetic adjustment slot 22 is too close to the center line of the corresponding magnetic steel slot 21, which increases the machining accuracy of the magnetic adjustment slot 22 and improves the production cost of the motor. On the other hand, it also reduces the magnetic flux density of the motor, reduces the output torque of the motor, and thus reduces the energy efficiency of the motor. Therefore, by setting 0.4°≤ , thereby reducing the machining accuracy of the magnetic tuning slot 22 while improving the magnetic field adjustment effect of the magnetic tuning slot 22 and improving the energy efficiency of the motor. Wherein, the units of St and Sr are both millimeters (mm); the units of α and β are both degrees (°).

[0024] The measurement method of St is: draw a line connecting point A and the center of the stator 10, and a line connecting point B and the center of the stator 10 respectively, and then measure the angle M between the two lines with an angle measuring instrument, and then measure the straight-line distance r between point A or point B and the center of the stator 10, then St= .

[0025] The measurement method of Sr is: draw a line connecting point C and the center of the stator 10, and a line connecting point D and the center of the stator 10, and then measure the angle M between the two lines with an angle measuring instrument, and then measure the straight-line distance r between point C or point D and the center of the stator 10, then Sr = .

[0026] It should be emphasized that St is not the length of the wall of the tooth shoe 13 facing away from the stator tooth 12. St and Sr are equal only when the curvature of the wall of the tooth shoe 13 facing away from the stator tooth 12 matches the curvature of the stator 10's outer circumference. Similarly, Sr is not the length of the bottom of the magnetic tuning slot 22. Sr is equal only when the curvature of the bottom of the magnetic tuning slot 22 matches the curvature of the rotor 20's outer circumference.

[0027] The method for measuring α is as follows: first, draw the bisector of each group of magnetic steel slots 21, which is the center line of each group of magnetic steel slots 21, then draw the extension line from the first slot wall 221 to the center of the rotor punching circle, and then use the angle measuring device to measure the angle between the center line and the extension line, which is α.

[0028] The measurement method of β is: first directly count the number of poles 2P on the rotor punching, and then β=360° / 2P.

[0029] Furthermore, the shortest distance between the magnetic tuning slot 22 and the center of the rotor 20 is L, the maximum outer diameter of the rotor punching is Dr, 0.06mm≤ ≤0.11mm. Indicates the matching degree between the depth of the magnetic adjustment slot 22 and the slot pole of the stator and rotor 20; if >0.11mm, it means that L is too small, that is, the magnetic adjustment slot 22 is too deep, which causes the magnetic flux to short-circuit, reduces the main magnetic flux, and thus reduces the output torque of the motor; at the same time, it is easy to cause the magnetic field at the bottom of the magnetic adjustment slot 22 to be locally saturated, thereby increasing iron loss and temperature rise, and reducing the efficiency of the motor; finally, the slot depth of the magnetic adjustment slot 22 is too large, which will cause the force wave modulation to fail and cause the risk of resonance. <0.06mm, it means that L is too close to Dr, which means that the depth of the magnetic adjustment slot 22 is too shallow, resulting in insufficient magnetic adjustment ability and harmonic adjustment ability of the magnetic adjustment slot 22, thereby increasing torque pulsation and further increasing the noise of the motor. Therefore, by setting 0.06mm≤ A reasonable setting of ≤0.11mm reduces the motor's cogging torque and torque ripple, suppresses the motor's vibration noise, reduces the motor's iron loss, and improves the motor's efficiency and torque density. The units of L and Dr are both millimeters (mm).

[0030] L is measured by selecting one or more deepest areas of the magnetic tuning slot 22, then selecting multiple points in each of the one or more areas, and then measuring the distance N between each of these points and the center of the rotor punching. The point with the smallest N value is L. At the same time, it should be noted that the points selected each time may be different, so the L value measured each time may be different, but these values ​​are all L. As long as the point in the deepest area of ​​the magnetic tuning slot 22 is selected, the error is within a reasonable range and does not affect the calculation formula of this application.

[0031] The measurement method of Dr is: draw a straight line through the center of the rotor punching circle. The two intersection points of this straight line and the outer peripheral wall of the rotor punching are E and F. The straight line and its extension line cannot pass through the magnetic tuning slot or other slot-shaped structures on the outer periphery of the rotor punching. The distance between point E and point F is Dr.

[0032] Specifically, . This reduces the cogging torque, making the motor run more smoothly and reducing the vibration and noise of the motor. At the same time, the closer the back EMF waveform is to a sine wave, the better the control performance of the motor and the smaller the torque pulsation, thereby reducing the torque pulsation. Furthermore, the reduction of spatial harmonics, especially low-order harmonics, directly contributes to the sinusoidalization of the back EMF waveform. Finally, spatial harmonics will generate additional iron losses in the iron core. By reducing low-order harmonics, these additional losses can be effectively suppressed, thereby reducing the iron loss of the motor and improving the efficiency of the motor.

[0033] In one embodiment, the minimum inner diameter of the rotor laminations is Dx, 19mm≤Dx≤22mm. This optimizes the air gap length and magnetic field distribution of the motor. A smaller air gap length can reduce magnetic resistance, thereby improving motor efficiency. Rotor laminations with an inner diameter ranging from 19mm to 22mm can provide sufficient space for heat dissipation channels within the motor without increasing the complexity of the heat dissipation path due to excessive size. Rotor laminations with an inner diameter ranging from 19mm to 22mm can also reduce electromagnetic and mechanical vibrations during motor operation, thereby reducing noise and improving the motor's energy efficiency. At the same time, the motor can achieve higher power output within a limited space, thereby improving the motor's energy efficiency.

[0034] The measurement method of Dx is: draw a straight line through the center of the rotor punching circle, and the two intersection points of this straight line with the inner circumferential wall of the rotor 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 punching. The distance between point E and point F is Dx.

[0035] In one embodiment, the maximum outer diameter of the rotor punching is Dr, 2.2 mm ≤ ≤2.4mm, thereby optimizing the motor's air gap length and magnetic field distribution, making the motor's electromagnetic performance more uniform. The proper matching of the air gap length and rotor 20 size can reduce magnetic resistance and improve motor efficiency. Furthermore, this ensures that the rotor laminations have sufficient mechanical strength during operation, enabling the rotor 20 to withstand the centrifugal and electromagnetic forces under high speed and high load conditions, thereby improving the motor's stability and reliability. Furthermore, it reduces electromagnetic and mechanical vibrations generated during motor operation, thereby reducing motor noise.

[0036] Specifically, 1.4≤ ≤1.6. Tooth harmonics are generated by the interaction between the stator 10 and the rotor 20. Therefore, when 1.4≤ When ≤1.6, the interaction between the stator slots 14 and the rotor poles 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.

[0037] 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.

[0038] Reference Figure 4 The motor in the technical solution of the present invention is primarily used in rotary compressors, which are generally unidirectional counterclockwise rotating motors. All motors generate a phase shift opposite to the direction of rotation during rotation. The motor in the prior art solution does not have a magnetic tuning slot 22. Embodiments 1 through 3 of the technical solution of the present invention all have magnetic tuning slots 22. However, the magnetic tuning slots 22 in Embodiment 1 are located on the counterclockwise side of the centerline of the corresponding group of magnetic steel slots 21. The magnetic tuning slots 22 in Embodiment 2 are located on the clockwise side of the centerline of the corresponding group of magnetic steel slots 21. In Embodiment 3, a magnetic tuning slot 22 is provided in both the clockwise and counterclockwise directions of the centerline of the same group of magnetic steel slots 21. Except for the lack of magnetic tuning slots 22, the motor speed, rotation time, rotation direction (all unidirectional counterclockwise), and ambient temperature during the experiments in the prior art solution and the technical solution of the present invention are consistent. Furthermore, the motors in the prior art solution and in Embodiments 1 through 3 of the technical solution of the present invention are all unidirectional counterclockwise rotating motors.

[0039] Reference Figure 4 It can be seen that the torque pulsation of the motor in the prior art solution is 11.4%, which is the highest value of torque pulsation. The torque pulsation of the motor in Implementation Method 1 is 4.8%, which is the lowest value of torque pulsation. The torque pulsation of the motor in Implementation Method 2 is 10.2%, which is smaller than the 11.4% in the prior art solution, but the difference between the two is small. The torque pulsation of the motor in Implementation Method 3 is 6.5%, which is between Implementation Method 1 and Implementation Method 2.

[0040] It can be understood that in the first embodiment, the magnetic tuning slot 22 is located on the counterclockwise side of the center line of the magnetic steel slot 21 of the corresponding group, which can offset to a more appropriate phase, which is more conducive to reducing the torque pulsation of the motor. In the second embodiment, the magnetic tuning slot 22 is located on the clockwise side of the center line of the magnetic steel slot 21 of the corresponding group. At this time, the magnetic tuning slot 22 offsets less phase, so the impact on the torque pulsation of the motor is relatively small. In the third embodiment, a magnetic tuning slot 22 is provided in the clockwise and counterclockwise directions of the center line of the magnetic steel slot 21 of the same group. Magnetic tuning slots 22 are provided on both sides of the center line of the magnetic steel slot 21. This symmetrical layout can effectively reduce the cogging torque because the magnetic tuning slots 22 on both sides can balance the magnetic resistance changes and reduce the overall harmonic content. However, for unidirectional counterclockwise rotation, the symmetrical layout is not optimal, because the magnetic tuning slots 22 on both sides will affect the magnetic fields in the clockwise and counterclockwise directions at the same time, but the rotation direction is fixed, which causes the optimization effect in the counterclockwise direction to be diluted. Therefore, in embodiment three, the adjustment of torque pulsation by the two magnetic tuning slots 22 is between embodiment one and embodiment two.

[0041] Of course, it should be noted that when the compressor is a scroll compressor, the general rotation direction of the scroll compressor is clockwise, that is, when the motor is a unidirectional clockwise rotating motor, the magnetic adjustment slot 22 is located on the counterclockwise side of the center line of the magnetic steel slot 21 of the corresponding group. The torque pulsation of the motor should be significantly greater than the torque pulsation of the motor when the magnetic adjustment slot 22 is located on the clockwise side of the center line of the magnetic steel slot 21 of the corresponding group.

[0042] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above-mentioned embodiment. Since the compressor in 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.

[0043] 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.

[0044] 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: The stator comprises a stator yoke, stator teeth and tooth shoes, the stator punching is provided with stator slots, and the number of the stator slots is Q; and A rotor, wherein an air gap is formed between the rotor and the stator, the rotor comprising a plurality of stacked rotor punchings, wherein a plurality of groups of magnetic steel slots are provided in the rotor punchings, and a plurality of magnetic adjustment slots are provided at intervals on the outer peripheral wall of the rotor punchings, wherein a group of the magnetic steel slots corresponds to at least one magnetic adjustment slot, and the two endpoints on the bottom wall of the same magnetic adjustment slot are points C and D, respectively, and the arc length of the shortest arc between points C and D and centered on the center of the rotor punching is Sr. The number of poles of the rotor is 2P, and the slot wall of the magnetic adjustment slot on the side close to the center line of the magnetic steel slot of the corresponding group is a first slot wall, and the extension line of the first slot wall passes through the center of the rotor. The angle between the first slot wall and the center line of the magnetic steel slot of the corresponding group is α, and the average angle occupied by each pole of the rotor is β. The two endpoints of the side wall of the tooth shoe facing the air gap are points A and B, respectively, and the arc length of the shortest arc between points A and B and centered on the center of the stator is St, 1.28 mm≤ ≤1.56mm, 0.4°≤ .

2. The motor according to claim 1, wherein The shortest distance between the magnetic adjustment slot and the center of the rotor is L, the maximum outer diameter of the rotor punching is Dr, 0.06mm≤ ≤0.11mm.

3. The motor according to claim 1, wherein 。 4. The motor according to claim 1, wherein The minimum inner diameter of the rotor punching is Dx, 19mm≤Dx≤22mm.

5. The motor according to claim 1, wherein The maximum outer diameter of the rotor punching is Dr, 2.2mm≤ ≤2.4mm.

6. The motor according to claim 1, wherein 1.4≤ ≤1.6。 7. The motor according to claim 1, wherein Q=15, P=5.

8. The motor according to claim 1, wherein The magnetic tuning slot is located on one side of the center line of the magnetic steel slot of the corresponding group in the clockwise direction; and / or The magnetic tuning slot is located on one side of the center line of the magnetic steel slot of the corresponding group in the counterclockwise direction.

9. A compressor, characterized in that: Comprising a motor as claimed in any one of claims 1 to 8.

10. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 9.

Images