Stator punching sheet, stator core, stator assembly, permanent magnet motor and compressor
By specifically designing the cut edges of the stator laminations and controlling their size and shape, the problem of deteriorated compressor performance caused by unreasonable permanent magnet motor structural design was solved, resulting in reduced noise and improved lubrication.
Patent Information
- Application Number
- CN202423000901.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-05
AI Technical Summary
An unreasonable design of the permanent magnet motor structure leads to poor compressor performance, manifested as problems such as high noise, low efficiency, high heat generation, and easy damage.
Design a stator lamination with a structure that satisfies 0.09≤S1/(π*(R1²-R2²)≤0.17, control the edge size and shape, ensure smooth return of refrigeration oil, and avoid problems such as vibration and poor cooling lubrication.
It effectively reduces compressor noise, improves lubrication, ensures cooling and stable performance of the compressor during high-frequency operation, and prevents damage.
Smart Images
Figure CN223680821U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the compressor field, specifically, relate to a stator lamination, stator core, stator assembly, permanent magnet motor and compressor. BACKGROUND
[0002] Permanent magnet motor is the important component of rotor compressor, and its design good or bad will directly influence rotor compressor's performance, therefore, the structural design of permanent magnet motor is also the important part in the design process of rotor compressor.
[0003] The rotor compressor in the prior art lacks effective guidance in the structural design of permanent magnet motor, and often has unreasonable design, resulting in poor performance of the rotor compressor, such as high noise, low efficiency, high heat, easy to damage, etc.
[0004] It can be seen that the unreasonable structural design of the permanent magnet motor in the related art leads to poor performance of the compressor, and for this technical problem, no effective solution has been proposed so far. UTILITY MODEL CONTENT
[0005] The main purpose of the utility model is to provide a stator lamination, stator core, stator assembly, permanent magnet motor and compressor to solve the technical problem of poor performance of the compressor caused by the unreasonable structural design of the permanent magnet motor in the related art.
[0006] In order to achieve the above purpose, according to one aspect of the utility model, a stator lamination is provided, which comprises: a main body part, the main body part is annular structure; a plurality of stator teeth, the plurality of stator teeth are arranged in the annular structure and connected with the main body part, the plurality of stator teeth are sequentially and spaced apart along the circumference of the main body part, and a stator slot is formed between any two adjacent stator teeth; wherein, the outer edge of the main body part is provided with a plurality of cut edges, the plurality of cut edges are sequentially and spaced apart along the circumference of the main body part, the structure of the stator lamination satisfies 0.09≤S1 / (π*(R1 2 -R2 2 ))≤0.17, S1 is the area enclosed between the outer edge of the main body part and the circumscribed circle of the main body part, R1 is the radius of the circumscribed circle, and R2 is the distance from the center of the main body part to the bottom of any stator slot.
[0007] Further, for any one cut edge, the line between the center point and the center of the main body part passes through one stator tooth, and the structure of the stator lamination further satisfies 3.2≤L1-R2≤4.0, wherein L1 is the distance from any one cut edge to the center of the main body part.
[0008] Further, the structure of the stator lamination further satisfies N1:N2=2, wherein N1 is the number of stator slots, and N2 is the number of cut edges.
[0009] Further, the structure of the stator lamination sheet satisfies 1.0≤θ1*N1 / 360≤1.3, wherein θ1 is an included angle between a center of the main body part and a line connecting two end points of any one of the cut edges.
[0010] Further, the cut edge comprises two straight edge segments and a recessed segment recessed towards the center of the main body part, the two straight edge segments are on the same straight line, and the two straight edge segments are correspondingly arranged on two sides of the recessed segment.
[0011] According to another aspect of the present application, a stator core is provided, the stator core has a plurality of stator lamination sheets stacked to form, wherein the stator lamination sheet is the stator lamination sheet described above.
[0012] According to another aspect of the present application, a stator assembly is provided, the stator assembly comprises a stator core and a plurality of stator windings, the stator core is the stator core described above, and the plurality of stator windings are correspondingly arranged in a plurality of winding accommodating grooves of the stator core, the winding accommodating groove is stacked to form by the stator slots of the plurality of stator lamination sheets.
[0013] According to another aspect of the present application, a permanent magnet motor is provided, comprising: a rotor assembly, the rotor assembly comprises a rotor core and a permanent magnet embedded thereon; a stator assembly, the stator assembly is the stator assembly described above, and the stator assembly is arranged around the rotor assembly.
[0014] Further, the permanent magnet motor is a concentrated winding type motor, the permanent magnet motor is a 12-slot 8-pole motor, and the speed range of the permanent magnet motor during operation is 10rps to 200rps.
[0015] According to another aspect of the present application, a compressor is provided, the compressor comprises the permanent magnet motor described above.
[0016] The stator lamination sheet of the embodiment of the present application comprises: a main body part, the main body part is of an annular structure; a plurality of stator teeth, the plurality of stator teeth are arranged in the annular structure and connected with the main body part, the plurality of stator teeth are sequentially and spacedly arranged along the circumference of the main body part, and a stator slot is formed between any two adjacent stator teeth; wherein the outer edge of the main body part is provided with a plurality of cut edges, the plurality of cut edges are sequentially and spacedly arranged along the circumference of the main body part, and the structure of the stator lamination sheet satisfies 0.09≤S1 / (π*(R1 2 -R2 2 ))≤0.17, S1 is an area enclosed between the outer edge of the main body part and an inscribed circle of the main body part, R1 is the radius of the inscribed circle, and R2 is the distance from the center of the main body part to the bottom of any one of the stator slots. The cut edge of the stator lamination sheet is designed in this way, and the applicant designs the cut edge of the stator lamination sheet to satisfy 0.09≤S1 / (π*(R1 2 -R2 2)≤0.17, thus, for different sizes of the stator lamination, S1 can be controlled in a reasonable range, so that the refrigeration oil of the compressor can smoothly flow back to the bottom of the compressor through the flow passage with the area of S1. The stator lamination with the structure can avoid the problem of vibration caused by too large cut edge, and can also avoid the problem of poor cooling and lubrication caused by too small cut edge, so as to ensure that the compressor structure using the stator lamination is in a better working state, and the technical problem of poor performance of the compressor caused by unreasonable structure design of the permanent magnet motor in the related art is solved. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings constituting a part of the specification illustrate the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0018] Figure 1 FIG. 1 is a structural schematic view of an embodiment of a stator lamination of the present application;
[0019] Figure 2 FIG. 2 is a schematic view of a combination of a stator assembly and a rotor assembly of the present application (the structure of the stator winding is omitted in the figure);
[0020] Figure 3 FIG. 3 is a comparison schematic view of the natural frequency of a compressor of an embodiment of the present application and a compressor in the related art;
[0021] Figure 4 FIG. 4 is a comparison schematic view of the noise of a compressor of an embodiment of the present application and a compressor in the related art;
[0022] Figure 5 FIG. 5 is a comparison schematic view of the oil discharge amount of a compressor of an embodiment of the present application and a compressor in the related art.
[0023] Among the above-mentioned drawings, the following reference signs are included:
[0024] 1, main body part; 2, stator tooth; 3, stator slot; 4, cut edge; 41, straight edge section; 42, recessed section; 10, rotor assembly; 20, stator assembly. DETAILED DESCRIPTION
[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] Applicants find that a key factor affecting the performance of the compressor by the permanent magnet motor lies in the cut edge control of the motor stator, and both too large and too small cut edge are not conducive to the performance optimization of the compressor, specifically, when the cut edge is too large, it will cause the rigidity of the stator core to be poor, thus causing the stator core to be prone to vibration problems, so that the compressor noise increases, and when the cut edge is too small, the refrigeration oil in the compressor cannot flow to the bottom of the compressor through the gap between the cut edge and the compressor shell in time, thus affecting the subsequent lubrication and cooling of the compressor, especially in the case of high frequency operation of the compressor, which will cause the lubrication effect of the compressor pump body to be poor, the loss to increase, and even damage the compressor, and also cause the motor to overheat due to the inability to cool, thus reducing the performance, and even burning the winding.
[0027] Please refer to Figures 1 to 5 In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a stator punching sheet, which comprises: a main body part 1, which is annular structure; a plurality of stator teeth 2, which are all arranged in the annular structure and connected with the main body part 1, the plurality of stator teeth 2 are sequentially and spacedly arranged along the circumference of the main body part 1, and a stator slot 3 is formed between any two adjacent stator teeth 2; wherein the outer edge of the main body part 1 is provided with a plurality of cut edges 4, the plurality of cut edges 4 are sequentially and spacedly arranged along the circumference of the main body part 1, and the structure of the stator punching sheet satisfies 0.09≤S1 / (π*(R1 2 -R2 2 ))≤0.17, S1 is the area enclosed between the outer edge of the main body part 1 and the circumscribed circle of the main body part 1, R1 is the radius of the circumscribed circle, and R2 is the distance from the center of the main body part 1 to the bottom of any stator slot 3.
[0028] The stator punching sheet with the structure design is adopted, the cut edge 4 of the stator punching sheet is designed specifically, so that it satisfies 0.09≤S1 / (π*(R1 2 -R2 2 ))≤0.17, therefore, for the stator punching sheets of different sizes, S1 can be controlled within a reasonable range, so that the refrigeration oil of the compressor can smoothly flow back to the bottom of the compressor through the flow channel with the area S1. The stator punching sheet with the structure design can avoid the vibration problem caused by too large cut edge 4, and also can avoid the problem of poor cooling and lubrication caused by too small cut edge 4, so as to ensure that the compressor structure using the stator punching sheet is in a better working state, and the technical problem that the performance of the compressor is poor due to the unreasonable structure design of the permanent magnet motor in the related art is solved.
[0029] In a specific embodiment, the plurality of stator teeth 2 are uniformly arranged on the main body part 1, that is, the plurality of stator teeth 2 are arranged at equal intervals / angles, and the plurality of cut edges 4 are uniformly distributed on the main body part 1, that is, the plurality of cut edges 4 are arranged at equal intervals / angles.
[0030] In an alternative embodiment, the bottom surface of the stator slot 3 is a circular arc surface, and R2 is the radius of the circular arc surface. Of course, the radius can be flexibly changed according to the design requirements.
[0031] For any one of the cut edges 4, the line between the point and the center of the main body part 1 passes through a stator tooth 2. The structure of the stator lamination further satisfies 3.2≤L1-R2≤4.0, wherein L1 is the distance from any one of the cut edges 4 to the center of the main body part 1.
[0032] In the embodiment, not only S1 is controlled, but also the value of L1-R2 is designed to be controlled between 3.2 and 4.0. If the value is too small, the cut edge 4 is too deep, which affects the rigidity of the stator, increases the noise, and if the value is too large, the cut edge 4 is too shallow, which also adversely affects the flowability of the refrigerator oil, thereby affecting the lubrication and heat dissipation of the compressor, and thus the performance of the compressor is reduced. In the embodiment, by further designing the value of L1-R2, the situation of too deep or too shallow cut edge 4 can be avoided, so as to balance the noise and performance of the compressor.
[0033] In a specific embodiment, the structure of the stator lamination further satisfies N1:N2=2, wherein N1 is the number of stator slots 3, and N2 is the number of cut edges 4.
[0034] In actual implementation, the number of cut edges 4 needs to be proportional to the number of phases of the permanent magnet motor (three-phase motor), otherwise the magnetic field imbalance will occur. Specifically, the value of N1:N2 can be selected as 1, 2 or 3.
[0035] In the embodiment, the value of N1:N2 is designed as 2, which can avoid too small value leading to too many cut edges and thus the rigidity of the stator is poor, and can also avoid too large value leading to too small total area of the cut edges, so as to ensure the strength of the stator structure and the flow effect of the refrigerator oil, and thus the noise and performance of the compressor are balanced.
[0036] In the embodiment, the structure of the stator lamination further satisfies 1.0≤θ1*N1 / 360≤1.3, wherein θ1 is the included angle between the center of the main body part 1 and the two endpoints of any one of the cut edges 4.
[0037] That is, for any one cutting edge 4, two end points of the cutting edge 4 are connected with the center of the main body part 1 respectively, and θ1 is the included angle between the two connecting lines. The embodiment further designs the structure of the stator lamination, controls the value of θ1*N1 / 360, and limits the shape of the cutting edge 4. Specifically, if θ1*N1 / 360 is too small, the area of the cutting edge 4 is small, and the oil return of the refrigeration oil is poor, and if θ1*N1 / 360 is too large, the rigidity of the stator structure is sacrificed, the noise is large, and the welding manufacturing process is not conducive.
[0038] Specifically, the cutting edge 4 includes two straight edge segments 41 and a recessed segment 42 recessed towards the center of the main body part 1, and the two straight edge segments 41 are on the same straight line and are correspondingly arranged on both sides of the recessed segment 42.
[0039] As shown in Figure 1 , the shape of the recessed segment 42 can be different, which is not limited here, for example Figure 1 rectangular recess and trapezoidal recess. The rectangular recess is conducive to clamping in the stator processing process, and the shape of the trapezoidal recess is conducive to reducing the influence on the rigidity of the stator structure.
[0040] Secondly, the embodiment of the utility model provides a kind of stator core, and stator core has multiple stator laminations stacking, wherein, stator lamination is described above stator lamination. To ensure that the size of cutting edge on stator core is appropriate, and then the rigidity of stator core and compressor oil return effect are considered, to ensure that the compressor using the stator core has smaller noise and better performance.
[0041] In addition, the embodiment of the utility model further provides a kind of stator assembly, and stator assembly includes stator core and multiple stator windings, stator core is described above stator core, and multiple stator windings are correspondingly wound in multiple winding accommodating slots of stator core, and winding accommodating slot has the stator slot 3 of multiple stator laminations stacking.
[0042] Thirdly, the embodiment of the utility model further provides a kind of permanent magnet motor, comprising: rotor assembly 10, rotor assembly includes rotor core and embedded permanent magnet on it;Stator assembly 20, stator assembly 20 is described above stator assembly, and stator assembly 20 is arranged around rotor assembly 10. The permanent magnet motor with this structure design can ensure that the size of cutting edge on stator core is appropriate by controlling the size of cutting edge of stator lamination, and then the rigidity of stator core and compressor oil return effect are considered, to ensure that the compressor using the permanent magnet motor has smaller noise and better performance.
[0043] In one specific embodiment, the permanent magnet motor is a concentrated winding motor, the permanent magnet motor is a 12-slot 8-pole motor, and the rotating speed range of the permanent magnet motor is 10rps to 200rps. It has been proved by practice that, after the above structure design is adopted, the noise of the compressor using the motor can be effectively controlled, and the compressor has higher performance, and has good practical application value.
[0044] Finally, the embodiment of the utility model also provides a kind of compressor, and the compressor includes the permanent magnet motor described above.
[0045] As Figures 3 to 5 shown, Figure 3 it is the inherent frequency comparison schematic diagram of the compressor of the utility model embodiment and the compressor in the related art; Figure 4 it is the noise comparison schematic diagram of the compressor of the utility model embodiment and the compressor in the related art; Figure 5 it is the oil discharge amount comparison schematic diagram of the compressor of the utility model embodiment and the compressor in the related art. Wherein, original scheme is the compressor in the related art, and new scheme is the compressor using the structure design of the utility model embodiment.
[0046] In Figure 3 the motor drive carrier frequency is 6000Hz, it can be seen that the inherent frequency of the compressor of the new scheme of the utility model embodiment deviates from 6000Hz more compared with the compressor of the original scheme in the related art, so as to effectively reduce the vibration of the compressor, and therefore the noise control of the compressor is better. In Figure 4 the motor drive carrier frequency is 6000Hz, it can be seen that the inherent frequency of the compressor of the new scheme of the utility model embodiment deviates from 6000Hz more compared with the compressor of the original scheme in the related art, so as to effectively reduce the vibration of the compressor, and therefore the noise control of the compressor is better. In
[0047] As Figure 5 shown, wherein, oil discharge amount is the amount of lubricating oil being carried out of compressor system by compressed gas in the operation process of compressor, and the lower the oil discharge amount is, the better, it can be seen that the oil discharge amount of new scheme is equivalent compared with original scheme, and therefore, the compressor using the structure design of the utility model embodiment can better balance the noise and performance of the compressor.
[0048] From the above description, it can be seen that the above-mentioned embodiment of the utility model realizes the following technical effects:
[0049] The stator lamination of the embodiment of the utility model includes: a main body part 1, which is annular structure; a plurality of stator teeth 2, which are all arranged in the annular structure and connected with the main body part 1, and are sequentially and spacedly arranged along the circumferential direction of the main body part 1, and a stator slot 3 is formed between any two adjacent stator teeth 2; wherein, the outer edge of the main body part 1 is provided with a plurality of cut edges 4, which are sequentially and spacedly arranged along the circumferential direction of the main body part 1, and the structure of the stator lamination satisfies 0.09≤S1 / (π* (R12 R2 2 ≤0.17. The stator core with the structure is designed, and the applicant designs the cut edge 4 of the stator core in a targeted manner, so that 0.09≤S1 / (π*(R1 2 R2 2 ≤0.17. Therefore, for different sizes of the stator core, S1 can be controlled in a reasonable range, so that the refrigeration oil of the compressor can smoothly flow back to the bottom of the compressor through the flow passage with the area S1. The stator core with the structure can avoid the problem of vibration caused by the too large cut edge 4, and can also avoid the problem of poor cooling and lubrication caused by the too small cut edge 4, so as to ensure that the structure of the compressor using the stator core is in a better working state, and the technical problem of poor performance of the compressor caused by the unreasonable structure of the permanent magnet motor in the related art is solved.
[0050] For the purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "between", "within", "left", "right", "rear", "front", "upper", "lower", "horizontal", "vertical", "above", "below", "on", "under", "in", "above", "below", "above", "below", "on", "under", "in", "at", "about", "near", "parallel", "perpendicular", "substantially", "approximately", "essentially", "upwardly", "downwardly", "clockwise", "counter-clockwise", "front", "rear", "lateral", "longitudinal", "transverse", "cross", "axial", "radial", and "tangential", will be used herein for the purpose of describing the illustrated embodiments of the present disclosure according to the orientations shown in the drawings. It will be understood that, unless otherwise noted, the spatially relative terms are intended to encompass different orientations of the device in use or operation, for example, in the figures. For example, if a device shown in the figures is turned over, elements described as "above" other elements or "below" other elements will then be oriented "below" other elements or "above" other elements. The exemplary term "above" can include both "above" and "below" orientations. The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0051] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" used in the specification indicate the presence of a feature, step, operation, device, component, and / or combination thereof.
[0052] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above description of the drawings merely mean different instances of similar objects and do not necessarily imply a specific order or sequence. It should be understood that the data thus used in the description is interchangeable under appropriate circumstances so that the embodiments of the present application described herein can be practiced in other than the illustrated or described order. Moreover, the terms "comprise", "comprising", and "having" and any variations thereof in the description and in the claims of the present application are intended to cover a non-exclusive inclusion such that a process, method, system, product, or apparatus that comprises a list of steps or units are not necessarily limited to those listed steps or units but can include other not-listed or inherent steps or units in this process, method, product, or apparatus.
[0053] The preferred embodiments of the present application are described above with the understanding that these are only the presently preferred embodiments and are not to be used to limit the present application in any way. The present application can be modified and changed in various ways by those skilled in the art, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A stator lamination characterized by, The stator lamination comprises: a main body part (1) in a ring structure; a plurality of stator teeth (2) arranged in the ring structure and connected with the main body part (1), the plurality of stator teeth (2) are arranged in sequence along the circumference of the main body part (1) and the stator slot (3) is formed between any two adjacent stator teeth (2); The outer edge of the main body part (1) is provided with a plurality of cut edges (4), the plurality of cut edges (4) are sequentially and spacedly arranged along the circumference of the main body part (1), and the structure of the stator sheet satisfies 0.09≤S1 / (π*(R1 2 -R2 2 ))≤0.17, S1 is the area surrounded between the outer edge of the main body part (1) and the circumscribed circle of the main body part (1), R1 is the radius of the circumscribed circle, and R2 is the distance from the center of the main body part (1) to the bottom of any one stator slot (3).
2. The stator lamination of claim 1, wherein, for any one of the cut edges (4), the line between the point and the center of the main body part (1) passes through one of the stator teeth (2), and the structure of the stator lamination further satisfies 3.2≤L1-R2≤4.0, wherein L1 is the distance from any one of the cut edges (4) to the center of the main body part (1).
3. The stator lamination of claim 1, wherein, The structure of the stator lamination further satisfies N1:N2=2, wherein N1 is the number of the stator slots (3) and N2 is the number of the cut edges (4).
4. A stator lamination according to claim 3, characterised in that The structure of the stator lamination further satisfies 1.0≤θ1*N1 / 360≤1.3, wherein θ1 is the included angle between the center of the main body part (1) and the two endpoints of any one of the cut edges (4).
5. A stator lamination according to any one of claims 1 to 4, characterized in that The cut edge (4) comprises two straight edge segments (41) and a recessed segment (42) recessed towards the center of the main body part (1), the two straight edge segments (41) are on the same straight line, and the two straight edge segments (41) are correspondingly arranged on the two sides of the recessed segment (42).
6. A stator core characterized by, The stator core is formed by stacking a plurality of stator laminations, wherein the stator lamination is the stator lamination of any one of claims 1 to 5.
7. A stator assembly characterized by, The stator assembly comprises a stator core and a plurality of stator windings, the stator core is the stator core of claim 6, and the plurality of stator windings are correspondingly arranged in a plurality of winding accommodating slots of the stator core, the winding accommodating slot is formed by stacking a plurality of stator slots (3) of the stator lamination.
8. A permanent magnet electric machine characterized by, The stator assembly (20) comprises: a rotor assembly (10) comprising a rotor core and a permanent magnet embedded therein; a stator assembly (20) as claimed in claim 7, the stator assembly (20) being arranged around the rotor assembly (10).
9. The permanent magnet electric machine of claim 8, wherein, The permanent magnet motor is a concentrated winding type motor, the permanent magnet motor is a 12-slot 8-pole motor, and the speed range of the permanent magnet motor during operation is 10rps to 200rps.
10. A compressor characterized by, The compressor comprises the permanent magnet motor of claim 9. The compressor comprises the permanent magnet motor of claim 9.