Motor, compressor and refrigeration equipment
By designing a reasonable stator groove structure in the stator parts of the motor, controlling torque pulsation, the motor vibration problem is solved, efficiency and heat dissipation performance are improved, and costs are reduced.
Patent Information
- Application Number
- CN202421869117.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-02
AI Technical Summary
Existing motors have torque pulsation when outputting electromagnetic torque, causing vibration problems, which are usually solved by introducing compensation current, but this increases input power, reduces efficiency or increases control costs.
A motor is designed, and its stator components include a stator core. A plurality of stator grooves are formed on the stator punching sheet of the stator core. By defining the sum of the notch widths of the stator groove and the proportion of the inner circumference of the stator punching sheet, torque pulsation is controlled, motor efficiency is improved, and cost is reduced.
Effectively control torque pulsation, improve motor efficiency, improve heat dissipation performance, reduce efficiency reduction and life shortening caused by overheating, thereby controlling costs.
Smart Images
Figure CN222928145U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and particularly to a motor, a compressor and a refrigeration device. Background Art
[0002] With the rapid development of industrial automation and intelligent manufacturing, as the core component of the driving device, the performance of the motor directly affects the efficiency and reliability of the entire system.
[0003] At present, in the electromagnetic torque output by the motor, there is usually a certain torque ripple, which will cause the vibration of the motor. In order to suppress the influence of the torque ripple, usually a compensation current is introduced through an inverter to reduce the vibration problem caused by the torque ripple. However, the introduction of the current will increase the input power of the motor, thus sacrificing the efficiency of the motor, or adding additional control hardware and software, thus increasing the cost. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a motor, a compressor and a refrigeration device, aiming to effectively control the torque ripple and effectively control the cost while improving the efficiency of the motor.
[0005] To achieve the above object, the motor proposed by the utility model includes a stator component;
[0006] The stator component includes a stator core, the stator core includes a plurality of stator punching sheets stacked along its axial direction, and the minimum radius of the stator punching sheet is R 1 , the stator punching sheet includes a stator yoke and a plurality of stator teeth arranged inside the stator yoke, and the minimum distance between the tooth tip portions of two adjacent stator teeth is L 2 , the stator yoke and two adjacent stator teeth enclose a stator slot, and the number of stator slots is Q,
[0007] In one embodiment,
[0008] In one embodiment, 2mm ≤ L 2 ≤ 4mm; and / or, 24mm ≤ R 1 ≤ 35mm.
[0009] In one embodiment, the motor further includes a rotor component arranged inside the stator component;
[0010] The number of poles P of the rotor component, the maximum distance R between the bottom wall of the stator slot and the center of the stator punching sheet 2 , the maximum radius R of the outer contour of the stator punching sheet 3 Satisfy:
[0011] In one embodiment,
[0012] In one embodiment, 5mm ≤ R 3 -R 2 ≤ 13mm; and / or, 24mm ≤ R 1 ≤ 35mm; and / or, 40mm ≤ R 3 ≤ 90mm.
[0013] In one embodiment, the stator tooth includes a tooth portion and the tooth boot portion. One end of the tooth portion is connected to the stator yoke, and the tooth boot portion is provided at the other end. The width of the tooth portion is L1.
[0014] In one embodiment,
[0015] and / or, 4mm ≤ L 1 ≤ 11mm.
[0016] In one embodiment, 15 ≤ Q ≤ 18; and / or, 10 ≤ P ≤ 12;
[0017] and / or, the outer contour of the stator yoke is any one of a circular shape and a special shape.
[0018] In one embodiment, the number Q of stator slots, the number of poles p of the rotor component, and the number of phases m of the motor satisfy: 0 < Q / mP < 1.
[0019] The present utility model also provides a compressor, which includes the motor as described above.
[0020] The present utility model also provides a refrigeration device, which includes the compressor as described above.
[0021] In the technical solution of the present utility model, the motor includes a stator component, and the stator component includes a stator core. A plurality of stator slots are formed on the stator punching sheet of the stator core. By defining that the ratio of the total width of the slot openings of the plurality of stator slots to the inner circumference of the stator punching sheet satisfies: In this way, by reasonably designing the slot opening width of the stator slots, it is possible to facilitate the assembly of the stator windings, ensure the flow of magnetic flux in the stator core of the motor, guarantee the maximum output torque of the motor, reduce the torque ripple, improve the motor efficiency, and on the basis of effectively controlling the torque ripple, improve the heat dissipation performance of the motor, thereby reducing the reduction in efficiency and shortening of the service life caused by motor overheating, and effectively controlling the cost. Description of the Drawings
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0023] Figure 1 Schematic structural diagram of an embodiment of a motor provided by the present invention;
[0024] Figure 2 For Figure 1 Schematic structural diagram of an embodiment of a stator punching sheet of a stator component in
[0025] Figure 3 For Figure 1 Schematic structural diagram of another embodiment of a stator punching sheet of a stator component in
[0026] Figure 4 For Figure 1 Schematic structural diagram of still another embodiment of a stator punching sheet of a stator component in
[0027] Figure 5 Schematic structural diagram of an embodiment of a compressor provided by the present invention;
[0028] Figure 6 Relationship diagram between the notch of the stator slot and the torque ripple;
[0029] Figure 7 Relationship diagram between the width of the stator yoke of the stator component and the rigidity of the motor;
[0030] Figure 8 Relationship diagram between the tooth width of the stator component and the rigidity of the motor.
[0031] Explanation of the reference numerals in the drawings:
[0032] 1. Compressor; 100. Motor; 10. Stator component; 11. Stator punching sheet; 111. Stator yoke; 112. Stator tooth; 1121. Tooth boot part; 1122. Tooth part; 113. Stator slot; 12. Stator winding; 20. Rotor component; 21. Rotor core; 211. Installation slot; 22. Permanent magnet; 30. Pump body component; 40. Housing.
[0033] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners
[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0035] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0037] With the rapid development of industrial automation and intelligent manufacturing, as the core component of the driving device, the performance of the motor directly affects the efficiency and reliability of the entire system.
[0038] Currently, in the electromagnetic torque output by the motor, there is usually a certain torque ripple, which will cause the vibration of the motor. In order to suppress the influence of the torque ripple, usually a compensation current is introduced through an inverter to reduce the vibration problem caused by the torque ripple. However, the introduction of the current will increase the input power of the motor, thus sacrificing the efficiency of the motor, or adding additional control hardware and software, thus increasing the cost.
[0039] To solve this technical problem, the present utility model proposes a motor 100.
[0040] Please refer to Figures 1 to 5, in an embodiment of the present utility model, the motor 100 includes a stator component 10; the stator component 10 includes a stator core, the stator core includes a plurality of stator laminations 11 laminated along its axial direction, and the minimum radius of the stator lamination 11 is R 1 , the stator lamination 11 includes a stator yoke 111 and a plurality of stator teeth 112 provided inside the stator yoke 111, and the minimum distance between the tooth tip portions 1121 of two adjacent stator teeth 112 is L 2 , the stator yoke 111 and two adjacent stator teeth 112 enclose a stator slot 113, and the number of stator slots 113 is Q With such a setting, the torque ripple can be effectively controlled, and while improving the motor efficiency, the cost can be effectively controlled
[0041] In the technical solution of the present utility model, the motor 100 includes a stator component 10, the stator component 10 includes a stator core, and a plurality of stator slots 113 are formed on the stator lamination 11 of the stator core. By defining that the ratio of the total width of the slot openings of the plurality of stator slots 113 to the inner circumference of the stator lamination 11 satisfies: In this way, the slot opening width of the stator slot 113 is reasonably designed, which can not only facilitate the assembly of the stator winding 12, but also ensure the flow of magnetic flux in the stator core of the motor 100, guarantee the maximum output torque of the motor 100, reduce the torque ripple, improve the motor efficiency, and on the basis of effectively controlling the torque ripple, improve the heat dissipation performance of the motor 100, thereby reducing the efficiency reduction and life shortening caused by the overheating of the motor 100, and thus effectively controlling the cost
[0042] Specifically, the slot opening width of the stator slot 113 is determined by the minimum distance between the tooth tip portions 1121 of two adjacent stator teeth 112, and the minimum radius of the stator lamination 11 is determined by the distance between the end of the stator tooth 112 far from the stator yoke 111 and the center of the stator lamination 11. Specifically, when Q is a certain value, when is less than 0.21, it is easy to make the slot opening of the stator slot 113 too small, which is not conducive to the assembly of the stator winding 12 in the stator slot 113, increases the difficulty of heat dissipation, and is also easy to make the inner diameter of the stator lamination 11 too large, increasing the overall size of the stator lamination 11, thereby increasing the manufacturing cost; when is greater than 0.29, it is easy to make the slot opening of the stator slot 113 too large, which is likely to limit the magnetic flux of the motor 100, resulting in a reduction in the efficiency of the motor 100, and will also affect the stable assembly of the stator winding 12 in the stator slot 113, resulting in an increase in torque ripple. It is also easy to make the inner diameter of the stator lamination 11 too small, affecting the maximum output torque of the motor 100. Therefore, when The specific value of is limited to between 0.21 and 0.29, which can ensure the maximum output torque of the motor 100, reduce torque pulsation, and thus improve motor efficiency, and can also improve the heat dissipation performance of the motor 100 on the basis of effectively controlling torque pulsation, and improve the convenience of disassembly and assembly of the stator winding 12 on the stator core on the basis of ensuring the miniaturization of the stator punching sheet 11. In addition, the stator slot 113 can also have a larger cross-sectional area to accommodate more stator windings 12, which helps to improve motor efficiency.
[0043] in, The specific values include but are not limited to 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, and 0.29.
[0044] Combination Figure 6 As shown, it can be obtained that when the limit When the specific value of is between 0.21 and 0.29, the torque pulsation of the motor 100 is small, which effectively reduces the vibration of the motor 100 and improves the motor performance.
[0045] Furthermore, in an embodiment of the present invention, Further reduce The value range ensures the optimization of motor performance, reduces the vibration reduction requirements of motor 100 complicated by large torque pulsation, and can further improve the heat dissipation performance of motor 100, reduces the need for an additional cooling system to complicate motor 100, thereby improving the performance of motor 100.
[0046] Optionally, in an embodiment of the present utility model, 2mm≤L 2 ≤4mm; understandable, when L 2 When L is less than 2 mm, the slot of the stator slot 113 is too small, which is not conducive to the assembly of the stator winding 12 in the stator slot 113 and increases the difficulty of heat dissipation. 2 When the width L of the stator slot 113 is greater than 4 mm, the slot opening of the stator slot 113 is too large, which may easily limit the magnetic flux of the motor 100, resulting in reduced efficiency of the motor 100 and affecting the stable assembly of the stator winding 12 in the stator slot 113, resulting in increased torque pulsation. Therefore, the slot opening width L of the stator slot 113 is set to 2 Limited between 2 mm and 4 mm, the slot size of the stator slot 113, that is, the minimum distance between the tooth boots 1121 of two adjacent stator teeth 112, can be reasonably designed to ensure rapid disassembly and stable assembly of the stator winding 12, reduce torque pulsation, and improve the efficiency and heat dissipation performance of the motor 100.
[0047] Specifically, the specific values of the notch width of the stator slot 113 include, but are not limited to, 2 mm, 3 mm, and 4 mm. However, in other embodiments, with the allowance of the size of the stator punching sheet 11, the notch width of the stator slot 113 can be greater than 4 mm or less than 2 mm. At this time the specific value of
[0048] Optionally, in the embodiments of the present invention, 24 mm ≤ R 1 ≤ 35 mm. It can be understood that when R 1 is less than 24 mm, the inner diameter of the stator punching sheet 11 is too small, affecting the maximum output torque of the motor 100; when R 1 is greater than 35 mm, the inner diameter of the stator punching sheet 11 is too large, which is likely to increase the overall size of the stator punching sheet 11, thereby increasing the manufacturing cost. Therefore, by limiting the minimum radius R 1 of the stator punching sheet 11 between 24 mm and 35 mm, the stator punching sheet 11 can be reasonably designed, which not only ensures the maximum output torque of the motor 100 but also improves the miniaturization level of the stator core.
[0049] Specifically, the specific values of the inner diameter R 1 of the stator punching sheet 11 include, but are not limited to, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, and 35 mm. However, in other embodiments, with the allowance of the size of the stator punching sheet 11, the inner diameter of the stator punching sheet 11 can be greater than 35 mm or less than 24 mm. At this time or the specific value of
[0050] Please refer to Figures 1 to 4 , in the embodiments of the present invention, the motor 100 further includes a rotor component 20 disposed inside the stator component 10; the number of poles P of the rotor component 20, the maximum distance R 2 between the bottom wall of the stator slot 113 and the center of the stator punching sheet 11, and the maximum radius R 3 of the outer contour of the stator punching sheet 11 satisfy: It can be understood that from R 3 - R 2 the distance from the bottom wall of the stator slot 113 to the outer contour of the stator punching sheet 11 can be obtained. 2 * R 1 is the inner diameter of the stator punching sheet 11. Among them, by limiting The ratio of P is between 0.002 and 0.012. The distance between the bottom wall of the stator slot 113 and the outer contour of the stator punching sheet 11 is reasonably designed, and the specific number P of the magnetic poles of the rotor component 20 is matched. In this way, the structural strength and rigidity of the stator punching sheet 11 can be ensured, and the vibration caused by the torque and electromagnetic force generated during the operation of the motor 100 can be more reliably resisted, the noise and vibration can be reduced, the running stability of the motor 100 can be improved, and the energy loss caused by vibration can be reduced, the efficiency of the motor 100 can be improved, and the shape and size of the stator punching sheet 11 can be kept stable and the low temperature rise can be maintained due to the high rigidity, thereby extending the service life of the motor 100.
[0051] Specifically, The specific values include but are not limited to 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, and 0.012.
[0052] Furthermore, in an embodiment of the present invention, Further reduce The value range ensures the optimization of the rigidity of the stator punching sheet 11, reduces torque pulsation and additional energy loss due to vibration, thereby improving the efficiency of the motor 100, and can further improve the heat dissipation performance of the motor 100, reduce heat accumulation caused by insufficient rigidity, reduce the temperature rise of the motor 100, and thereby increase the life and working stability of the motor 100, thereby improving the performance of the motor 100.
[0053] Combination Figure 7 As shown, it can be obtained that when the limit When the specific value of is between 0.005 and 0.012, the stator core has better rigidity, which helps to reliably control the torque pulsation of the motor 100, reduce the vibration and noise of the motor 100, and improve the motor performance.
[0054] Optionally, in an embodiment of the present utility model, 5 mm ≤ R 3 -R 2 ≤13mm, it is understandable that when R 3 -R 2 When the distance between the bottom wall of the stator slot 113 and the outer contour of the stator punching sheet 11 is smaller, it is not conducive to maintaining the shape and size of the stator punching sheet 11, nor is it conducive to controlling the temperature rise and torque pulsation of the motor 100; when R 3 -R 2 When the R is greater than 13 mm, the distance between the bottom wall of the stator slot 113 and the outer contour of the stator punching sheet 11 is large, which is easy to increase the size of the stator punching sheet 11 and also affect the output torque of the motor 100. Therefore, R 3 -R2 The difference is limited between 5 mm and 13 mm. On the basis of ensuring the maximum output torque of the motor 100, the torque ripple is reduced, the heat dissipation effect is improved, thereby improving the performance of the motor 100.
[0055] Specifically, R 3 -R 2 The specific values of the difference include but are not limited to 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm. However, in other embodiments, with the allowance of the size of the stator punching sheet 11, R 3 -R 2 can be greater than 13 mm or less than 5 mm. At this time the specific values can also change.
[0056] Optionally, in the embodiments of the present invention, 40 mm ≤ R 3 ≤ 90 mm. In this way, the maximum radius of the stator punching sheet 11 can be reasonably controlled, and further the miniaturization of the stator core can be realized. At the same time, in cooperation with the limitation of the difference between R 3 -R 2 the performance of the motor 100 is improved.
[0057] Specifically, the specific values of the maximum radius of the stator punching sheet 11 include but are not limited to 40 mm, 45 mm, 50 mm, 60 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm. However, in other embodiments, with the allowance of the size of the stator punching sheet 11, the maximum radius of the stator punching sheet 11 can be greater than 90 mm or less than 40 mm. At this time the specific values can also change.
[0058] In addition, the ratio between the outer diameter R 3 of the stator punching sheet 11 and the inner diameter R 1 of the stator punching sheet 11 can be limited, which can improve the maximum output torque of the motor 100 on the basis of ensuring the miniaturization of the stator core.
[0059] The maximum radius of the outer peripheral edge of the stator punching sheet 11 is R 3 , that is, the maximum distance from the center of the stator punching sheet 11 to its outer edge contour. If the outer peripheral edge of the stator punching sheet 11 is a complete circle, it can be directly measured, and the maximum value of the measured radius of the stator punching sheet 11 is R 3 ; if the outer peripheral edge of the stator punching sheet 11 is in the form of a non-complete circle with grooves, after determining the circle at three points at the outermost end of the arc, the maximum value of the measured radius of the stator punching sheet 11 is R 3 .
[0060] The distance between the bottom wall of the stator slot 113 and the center of the stator punching sheet 11 is R 2, which is the maximum distance from the center of the stator punching 11 to the bottom wall of its stator slot 113. If the integrated contour of the inner peripheral edges of the bottom walls of the stator slots 113 is a complete circle, it can be directly measured, and the maximum distance from the center of the stator punching 11 to the bottom wall of its stator slot 113 is measured as R 2 ; if the integrated contour of the inner peripheral edges of the bottom walls of the stator slots 113 is in the form of a non-complete circle with grooves, after determining a circle at three points at the outermost end of the arc, the maximum distance from the center of the stator punching 11 to the bottom wall of its stator slot 113 is measured as R 2 .
[0061] The minimum radius of the inner peripheral edge of the stator punching 11 is R 1 , which is the minimum distance from the center of the stator punching 11 to its inner edge contour. If the inner peripheral edge of the stator punching 11 is a complete circle, it can be directly measured, and the minimum value of the radius of the stator punching 11 is measured as R 1 ; if the inner peripheral edge of the stator punching 11 is in the form of a non-complete circle with grooves, after determining a circle at three points at the innermost end of the arc, the minimum value of the radius of the stator punching 11 is measured as R 1 .
[0062] Please refer to Figures 1 to 4 , in the embodiment of the present invention, the stator tooth 112 includes a tooth portion 1122 and the tooth shoe portion 1121. One end of the tooth portion 1122 is connected to the stator yoke 111, and the other end is provided with the tooth shoe portion 1121. The width of the tooth portion 1122 is L1 It can be understood that tooth shoe portions 1121 are provided on both opposite sides of the end of the tooth portion 1122 away from the stator yoke 111 to restrain the movement tendency of the stator winding 12 to escape from the stator slot 113 and ensure the stable assembly of the stator winding 12. Among them, by limiting the value of the ratio of and P is between 0.003 and 0.013. Since the radiation path of the magnetic flux is between the tooth portion 1122, the stator yoke 111 and the rotor component 20, the width of the tooth portion 1122 is reasonably designed to improve the structural strength and rigidity of the stator tooth 112, which helps to improve the vibration during the operation of the motor 100, reduce the noise, cooperate with the specific number P of the magnetic poles of the rotor component 20. In the case of more magnetic poles, the order of the noise is increased, the electromagnetic force is reduced, so as to further reduce the vibration, improve the operation stability of the motor 100, reduce the noise, and also facilitate maintaining the shape and size stability of the stator punching 11 and low temperature rise due to high rigidity, and extend the service life of the motor 100
[0063] Specifically the specific values of include but are not limited to 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.011, 0.012, 0.013
[0064] Furthermore, in the embodiment of the present utility model, that is, further narrow down the value range of, to ensure the optimization of the rigidity of the stator punching sheet 11, reduce torque ripple and additional energy loss caused by vibration, thereby improving the efficiency of the motor 100, and further improving the heat dissipation performance of the motor 100, reducing heat accumulation caused by insufficient rigidity, reducing the temperature rise of the motor 100, and thereby improving the service life and working stability of the motor 100, so as to improve the performance of the motor 100.
[0065] Combined with Figure 8 as shown, it can be obtained that when the specific value of is limited between 0.006 and 0.013, the stator core has better rigidity. In this way, it helps to reliably control the torque ripple of the motor 100, reduce the vibration and noise of the motor 100, and improve the motor performance.
[0066] Optionally, in the embodiment of the present utility model, 4mm ≤ L 1 ≤ 11mm. It can be understood that when L 1 is less than 4mm, the width of the tooth part 1122 is small, which is not conducive to maintaining the shape and size of the stator punching sheet 11, nor is it conducive to controlling the temperature rise and torque ripple of the motor 100; when L 1 is greater than 11mm, the width of the tooth part 1122 is large, which is likely to reduce the cross-sectional area of the stator slot 113 and affect the torque output of the motor 100. Therefore, L 1 is limited between 4mm and 11mm, on the basis of ensuring the maximum output torque of the motor 100, reducing torque ripple and improving the heat dissipation effect, so as to improve the performance of the motor 100.
[0067] Specifically, the specific values of the width of the tooth part 1122 include but are not limited to 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm. However, in other embodiments, within the allowable range of the size of the stator punching sheet 11, the width of the tooth part 1122 can be greater than 11mm or less than 4mm. At this time the specific value of can also change.
[0068] Optionally, in the embodiment of the present utility model, 15 ≤ Q ≤ 18; wherein, the number of stator slots 113 can be selected according to actual needs.
[0069] Optionally, in the embodiment of the present utility model, 10 ≤ P ≤ 12, wherein, the number of poles of the rotor component 20 can be selected according to actual needs.
[0070] Please refer to Figures 2 to 4 , in the embodiment of the present utility model, the outer contour of the stator yoke 111 is any one of a circle and a special shape. Among them, asFigure 2 As shown, the outer contour of the stator yoke 111 is circular, which is convenient for the manufacture of the stator punching 11. At the same time, it helps to achieve a more uniform magnetic flux distribution, reduce the local concentration of magnetic flux, and thus reduce iron loss. As Figure 3 and Figure 4 shown, the outer contour of the stator yoke 111 is irregular, that is, a groove is formed outside the stator yoke 111, and the distance between the bottom wall of the groove and the center of the stator punching 11 is between the maximum radius and the minimum radius of the stator yoke 111. By providing a larger surface area, heat exchange is increased, and the heat dissipation performance of the motor 100 is improved. Among them, the contour line of the groove may include at least one of an arc segment, a straight line segment, and a polyline.
[0071] Optionally, in the embodiment of the present invention, the number Q of the stator slots 113, the number of poles p of the rotor component 100, and the number of phases m of the motor satisfy: 0 < Q / mP < 1, that is, the motor 100 is a fractional-slot motor 100. Among them, by using a fractional-slot motor 100, the uneven distribution of magnetic flux can be reduced by optimizing the combination of the number of slots and the number of poles, and a smoother torque can also be output, thereby improving the performance of the motor.
[0072] The present invention also provides a compressor 1, which includes a motor 100. The specific structure of the motor 100 refers to the above embodiments. Since this compressor 1 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the compressor 1 includes a housing 40, a stator component 10 arranged inside the housing 40, a rotor component 20 arranged inside the stator component 10, and a pump body component 30 connected to the rotor component 20.
[0073] The present invention also provides a refrigeration device, which includes a compressor 1. The specific structure of the compressor 1 refers to the above embodiments. Since this refrigeration device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0074] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.
Claims
1. A motor, characterized in that: including a stator component; The stator component includes a stator core, the stator core includes a plurality of stator punching sheets stacked along its axial direction, the minimum radius of the stator punching sheets is R1, the stator punching sheets include a stator yoke and a plurality of stator teeth arranged inside the stator yoke, the minimum distance between the tooth boots of two adjacent stator teeth is L2, the stator yoke and the two adjacent stator teeth enclose a stator slot, the number of the stator slots is Q, 2. The motor according to claim 1, characterized in that 3. The motor according to claim 1, characterized in that 2mm≤L2≤4mm; and / or, 24mm≤R1≤35mm.
4. The motor according to claim 1, characterized in that The motor further comprises a rotor component disposed inside the stator component; The number of poles P of the rotor component, the maximum distance R2 between the bottom wall of the stator slot and the center of the stator punching sheet, the maximum radius R of the outer contour of the stator punching sheet 3, satisfy:
5. The motor according to claim 4, characterized in that 6. The motor according to claim 4, characterized in that 5mm≤R3-R2≤13mm; and / or, 24mm≤R1≤35mm; and / or, 40mm≤R3≤90mm.
7. The motor according to claim 4, characterized in that The stator teeth include a tooth portion and a tooth shoe portion. One end of the tooth portion is connected to the stator yoke, and the other end is provided with the tooth shoe portion. The width of the tooth portion is L1.
8. The motor according to claim 7, characterized in that And / or, 4mm≤L1≤11mm.
9. The motor according to claim 1, characterized in that 15≤Q≤18; and / or, 10≤P≤12; And / or, the outer contour of the stator yoke is any one of circular and irregular.
10. The motor according to claim 1, characterized in that The number Q of the stator slots, the number p of the poles of the rotor component, and the number m of the motor phases satisfy: 0<Q / mP<1.
11. A compressor, characterized in that: Comprising the electric machine as claimed in any one of claims 1 to 10.
12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.