Compressor motor stator structure and compressor motor

Abstract

The utility model provides a kind of motor stator structure and compressor motor for compressor, and stator structure includes multiple stator sheet, and multiple stator sheet is stacked to form stator core;Stator sheet includes stator yoke part and stator tooth;Form stator slot between two adjacent stator teeth;At least some stator sheet in all stator sheet has magnetic adjustment hole;On the stator sheet with magnetic adjustment hole, at least one magnetic adjustment hole is equipped on each stator tooth, magnetic adjustment hole is located at the end of stator tooth and the side away from motor rotating direction;The difference between the total number of stator sheet and the number of stator sheet with magnetic adjustment hole is less than 20;The distance from the end of stator tooth to the center of stator sheet is R, the maximum distance from magnetic adjustment hole to the center of stator sheet is d1, d1-R=0.8mm.The utility model can reduce motor torque ripple and the vibration, noise of compressor under the premise of guaranteeing the basic output performance and efficiency of motor, and also can save material, improve economic benefit.

Description

Technical Field

[0001] This utility model relates to the field of compressor motor technology, and in particular to a stator structure for a compressor motor and a compressor motor. Background Technology

[0002] With social progress and economic development, residents' living standards have significantly improved. When purchasing refrigeration equipment such as air conditioners and refrigerators, consumers no longer only focus on product prices but also place higher demands on their noise levels during operation. Low noise has become one of the key indicators for measuring the quality of refrigeration equipment and user experience.

[0003] As the core power source of refrigeration equipment, the compressor's vibration and noise performance directly determines the overall noise level of the machine. Within the compressor, the motor, as the core power output component, is the main source of vibration and noise for the entire system. The motor's vibration and noise directly affect the magnitude of vibration and noise in refrigeration equipment such as refrigerators and air conditioners.

[0004] By optimizing the stator structural parameters of a motor, the harmonic electromagnetic force can be significantly reduced, and harmonic electromagnetic force is one of the important causes of noise during motor operation. Even slight changes in stator structural parameters (such as slot shape, pole arc coefficient, slot width, magnetic circuit size, etc.) can significantly affect the distribution of the air gap magnetic field and the harmonic content.

[0005] Therefore, how to systematically reduce motor torque pulsation caused by harmonic electromagnetic forces through innovative stator structure design, while ensuring the basic output performance and efficiency of the motor, and thus effectively control the vibration and noise of the compressor, has become a key technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a stator structure for a compressor motor and a compressor motor, which can reduce motor torque pulsation and compressor vibration and noise while ensuring the basic output performance and efficiency of the motor, and at the same time save materials and improve economic efficiency.

[0007] To achieve the above objectives, this utility model provides a stator structure for a compressor motor, which includes multiple stator segments, and the multiple stator segments are stacked to form a stator core;

[0008] The stator segments include an annular stator yoke and stator teeth;

[0009] The inner ring of the stator yoke extends radially inward to form a plurality of stator teeth, which are spaced apart, and a stator slot is formed between two adjacent stator teeth;

[0010] At least some of the stator segments have magnetic adjustment holes;

[0011] On the stator laminations having the magnetic adjustment holes, each stator tooth is provided with at least one magnetic adjustment hole, the magnetic adjustment hole being located at the end of the stator tooth and on the side opposite to the direction of motor rotation;

[0012] The difference between the number of stator laminations in one of the stator cores and the number of stator laminations having the magnetizing holes is less than 20.

[0013] Let R be the distance from the end of the stator tooth to the center of the stator segment, and let d1 be the maximum distance from the magnetic adjustment hole to the center of the stator segment. Then d1-R≥0.8mm.

[0014] Optionally, let d2 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing the direction of motor rotation, and d3 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing away from the direction of motor rotation. Then 5mm ≥ d2 - d3 ≥ 0.2mm.

[0015] Optionally, each of the stator teeth includes a stator tooth root and two stator tooth tips, the two stator tooth tips are located at the ends of the stator tooth root, the distance between the tips of the two stator tooth tips is greater than the width of the stator tooth root, and the distance from the magnetic adjustment hole to the center of the stator segment is not greater than the distance from the junction of the stator tooth tip and the side of the stator tooth root to the center of the stator segment.

[0016] Optionally, the area of ​​a single magnetizing hole is greater than 0.25 mm². 2 .

[0017] Optionally, the ratio of the number of stator slots to the number of poles of the motor is 3 / 2 or 6 / 5.

[0018] Optionally, let d2 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing the direction of motor rotation, and d3 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing away from the direction of motor rotation. Then d1+d2≥d3+R+1.

[0019] Optionally, on the stator laminations having the magnetic adjustment holes, each stator tooth has the same number of magnetic adjustment holes of the same shape and size, and the magnetic adjustment holes are located in the same position on the stator teeth.

[0020] As configured above, this utility model provides a stator structure for a compressor motor, which includes multiple stator laminations stacked to form a stator core. Each stator lamination includes an annular stator yoke and stator teeth. The inner ring of the stator yoke extends radially inward to form multiple stator teeth, which are spaced apart, and stator slots are formed between adjacent stator teeth. At least some of the stator laminations have magnetic adjustment holes. On the stator laminations with magnetic adjustment holes, each stator tooth has at least one magnetic adjustment hole, which is located at the end of the stator tooth and on the side opposite to the direction of motor rotation.

[0021] In summary, this invention provides magnetic adjustment holes on at least some of the stator laminations, positioning these holes at the ends of the stator teeth and away from the direction of motor rotation. Furthermore, the number, shape, size, and position of the magnetic adjustment holes on each stator tooth are identical. It also provides preferred numerical ranges for some motor stator structural parameters, such as limiting the number of stator laminations with magnetic adjustment holes, limiting the area of ​​a single magnetic adjustment hole, specifying the exact range of the magnetic adjustment holes' positions on the stator laminations, and providing an optimal ratio of stator slots to motor poles. Further, on the one hand, increasing the number of magnetic adjustment holes effectively improves the motor's magnetic field distribution and optimizes the air gap magnetic flux density; on the other hand, it reduces the amount of electrical steel used in manufacturing the stator laminations, further lowering the cost of electrical steel and enhancing market competitiveness. Through the above-mentioned optimized stator structure design, the compressor motor stator structure of this invention can reduce motor torque pulsation and compressor vibration and noise while ensuring the basic output performance and efficiency of the motor, while also saving materials and improving economic efficiency.

[0022] According to another aspect of the present invention, the present invention also provides a motor for a compressor, the motor comprising the stator structure described above.

[0023] It should be noted that the compressor motor and the compressor motor stator structure belong to the same utility model concept and have the same or corresponding specific technical features. Therefore, the compressor motor also has the technical effects of the compressor motor stator structure, which will not be repeated here. Attached Figure Description

[0024] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0025] Figure 1 This is a schematic diagram of the stator structure of a compressor motor according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1A magnified view of a portion of the image;

[0027] Figure 3 This is a schematic diagram of the connection between the stator tooth tip and the stator tooth root side of the stator structure of a compressor motor according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a square magnetic adjustment hole according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of a triangular magnetic adjustment hole according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of an elliptical magnetic adjustment hole according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of an L-shaped magnetic adjustment hole according to an embodiment of the present invention.

[0032] The accompanying figure is labeled as follows:

[0033] 1-Stator segment; 2-Stator yoke; 3-Stator tooth; 31-Magnetic adjustment hole; 32-Stator tooth root; 33-Stator tooth tip;

[0034] d1 - The maximum distance from the magnetic adjustment hole to the center of the stator segment;

[0035] R - The distance from the end of the stator tooth to the center of the stator lamination;

[0036] h - the distance from the junction of the stator tooth root side to the center of the stator lamination;

[0037] d2 - The distance from the magnetic adjustment hole to the slot opening of the stator slot on the side that is in the direction of motor rotation;

[0038] d3 - The distance from the magnetic adjustment hole to the slot opening of the stator slot on the side opposite to the direction of motor rotation. Detailed Implementation

[0039] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0040] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0041] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0042] Figure 1 This is a schematic diagram of the stator structure of a compressor motor according to an embodiment of the present invention. Figure 2 yes Figure 1 A magnified view of a portion of the image. Please refer to it. Figure 1 and Figure 2 This utility model provides a stator structure for a compressor motor, including multiple stator segments 1, which are stacked to form a stator core.

[0043] The stator segment 1 includes an annular stator yoke 2 and stator teeth 3.

[0044] The inner ring of the stator yoke 2 extends radially inward to form a plurality of stator teeth 3, which are spaced apart. A stator slot 4 is formed between two adjacent stator teeth 3. The ratio of the number of stator slots 4 to the number of poles of the motor is 3 / 2 or 6 / 5.

[0045] At least some of the stator segments 1 have magnetic adjustment holes 31, preferably with an area greater than 0.25 mm². 2 The difference between the number of stator laminations 1 in one stator core and the number of stator laminations 1 with the magnetic adjustment holes 31 is less than 20. That is, the total number of stator laminations 1 in one stator core minus the number of stator laminations 1 with the magnetic adjustment holes 31 is less than 20.

[0046] On the stator laminations 1 with the aforementioned magnetic adjustment holes 31, each stator tooth 3 is provided with at least one magnetic adjustment hole 31. The magnetic adjustment hole 31 is located at the end of the stator tooth 3 and on the side opposite to the direction of motor rotation, in order to optimize the distribution of magnetic lines of force and reduce air gap magnetic flux harmonics. Further, let R be the distance from the end of the stator tooth 3 to the center of the stator lamination 1, where R can also be called the stator inner diameter. Let d1 be the maximum distance from the magnetic adjustment hole 31 to the center of the stator lamination 1, then d1 - R ≥ 0.8 mm. It should be noted that the maximum distance d1 refers to the distance between the furthest point of the magnetic adjustment hole 31 and the center of the stator lamination 1, not the distance from the center of the magnetic adjustment hole 31 to the center of the stator lamination 1.

[0047] Furthermore, each stator tooth 3 includes a stator tooth root 32 and two stator tooth tips 33. The two stator tooth tips 33 are located at the ends of the stator tooth root 32. It can be understood that the two stator tooth tips 33 are located on both sides of the end of the stator tooth root 32, and the distance between the tips of the two stator tooth tips 33 is greater than the width of the stator tooth root 32. That is, the two stator tooth tips 33 extend to both sides of the stator tooth root 32, and the stator tooth root 32 and its two end stator tooth tips 33 form a T-shape. The distance from the magnetic adjustment hole 31 to the center of the stator segment 1 is not greater than the distance h from the junction of the stator tooth tip 33 and the side of the stator tooth root 32 to the center of the stator segment 1. Figure 3 As shown.

[0048] Preferably, let d2 be the distance from the magnetic adjustment hole 31 to the opening of the stator slot 4 on the side facing the motor rotation direction, and d3 be the distance from the magnetic adjustment hole 31 to the opening of the stator slot 4 on the side facing away from the motor rotation direction. Then, 5mm ≥ d2 - d3 ≥ 0.2mm. Specifically, since each stator tooth 3 has two stator tooth tips 33, the opening of the stator slot 4 is the end of the stator tooth tip 33, and d2 and d3 are as follows: Figure 1 and Figure 2 As shown, d2 is the distance from the center of the magnetic adjustment hole 31 to the end of the stator tooth tip 33 on the side facing the direction of motor rotation, and d3 is the distance from the center of the magnetic adjustment hole 31 to the end of the stator tooth tip 33 on the side facing away from the direction of motor rotation. Furthermore, d1+d2≥d3+R+1.

[0049] Preferably, on the stator laminations 1 having the magnetic adjustment holes 31, each stator tooth 3 has the same number of magnetic adjustment holes 31 of the same shape and size, and the magnetic adjustment holes 31 are positioned at the same location on the stator tooth 3 to ensure uniform distribution of magnetic lines of force. This invention does not limit the shape of the magnetic adjustment holes 31; the magnetic adjustment holes 31 can be square (…). Figure 4 The magnetic adjustment hole 31 can be triangular. Figure 5 The magnetic adjustment hole 31 can be elliptical. Figure 6 The magnetic adjustment hole 31 can be L-shaped. Figure 7 )wait.

[0050] As configured above, this utility model provides a stator structure for a compressor motor, which includes multiple stator segments 1, which are stacked to form a stator core. Each stator segment 1 includes an annular stator yoke 2 and stator teeth 3. The inner ring of the stator yoke 2 extends radially inward to form multiple stator teeth 3, which are spaced apart, and stator slots 4 are formed between two adjacent stator teeth 3. At least some of the stator segments 1 have magnetic adjustment holes 31. On the stator segments 1 with magnetic adjustment holes 31, each stator tooth 3 is provided with at least one magnetic adjustment hole 31, which is located at the end of the stator tooth 3 and on the side opposite to the direction of motor rotation.

[0051] In summary, this invention provides magnetic adjustment holes 31 on at least a portion of the stator laminations 1, and positions the magnetic adjustment holes 31 at the ends of the stator teeth 3 on a side opposite to the motor's rotation direction. Furthermore, the number, shape, size, and position of the magnetic adjustment holes 31 on each stator tooth 3 are identical. It also provides preferred numerical ranges for some motor stator structural parameters, such as limiting the number of stator laminations 1 with the magnetic adjustment holes 31, limiting the area of ​​a single magnetic adjustment hole 31, providing specific ranges for the positions of the magnetic adjustment holes 31 on the stator laminations 1, and providing an optimal ratio of the number of stator slots 4 to the number of motor poles. Moreover, on the one hand, increasing the number of magnetic adjustment holes 31 can effectively improve the magnetic field distribution of the motor and optimize the air gap magnetic flux density; on the other hand, increasing the number of magnetic adjustment holes 31 can reduce the amount of electrical steel used in manufacturing the stator laminations 1, further reducing the cost of electrical steel and enhancing market competitiveness. Through the above-mentioned optimized design of the motor stator structure, the motor stator structure for compressors of this utility model can reduce motor torque pulsation and compressor vibration and noise while ensuring the basic output performance and efficiency of the motor. At the same time, it can also save materials and improve economic efficiency.

[0052] According to another aspect of the present invention, the present invention also provides a motor for a compressor, the motor comprising the stator structure described above.

[0053] It should be noted that the compressor motor and the compressor motor stator structure belong to the same utility model concept and have the same or corresponding specific technical features. Therefore, the compressor motor also has the technical effects of the compressor motor stator structure, which will not be repeated here.

[0054] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0055] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0056] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0057] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0058] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A stator structure for a compressor motor, characterized in that, It includes multiple stator laminations, which are stacked to form a stator core; The stator segments include an annular stator yoke and stator teeth; The inner ring of the stator yoke extends radially inward to form a plurality of stator teeth, which are spaced apart, and a stator slot is formed between two adjacent stator teeth; At least some of the stator segments have magnetic adjustment holes; On the stator laminations having the magnetic adjustment holes, each stator tooth is provided with at least one magnetic adjustment hole, the magnetic adjustment hole being located at the end of the stator tooth and on the side opposite to the direction of motor rotation; The difference between the number of stator laminations in one of the stator cores and the number of stator laminations having the magnetizing holes is less than 20. Let R be the distance from the end of the stator tooth to the center of the stator segment, and let d1 be the maximum distance from the magnetic adjustment hole to the center of the stator segment. Then d1-R≥0.8mm.

2. The compressor motor stator structure as described in claim 1, characterized in that, Let d2 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing the direction of motor rotation, and d3 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing away from the direction of motor rotation. Then 5mm ≥ d2 - d3 ≥ 0.2mm.

3. The compressor motor stator structure as described in claim 1, characterized in that, Each stator tooth includes a stator tooth root and two stator tooth tips. The two stator tooth tips are located at the ends of the stator tooth root. The distance between the tips of the two stator tooth tips is greater than the width of the stator tooth root. The distance from the magnetic adjustment hole to the center of the stator segment is not greater than the distance from the junction of the stator tooth tip and the side of the stator tooth root to the center of the stator segment.

4. The compressor motor stator structure as described in claim 1, characterized in that, The area of ​​a single magnetic adjustment hole is greater than 0.25 mm². 2 .

5. The compressor motor stator structure as described in claim 1, characterized in that, The ratio of the number of stator slots to the number of poles of the motor is 3 / 2 or 6 / 5.

6. The compressor motor stator structure as described in claim 1, characterized in that, Let d2 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing the direction of motor rotation, and d3 be the distance from the magnetic adjustment hole to the opening of the stator slot on the side facing away from the direction of motor rotation. Then d1+d2≥d3+R+1.

7. The compressor motor stator structure as described in claim 1, characterized in that, On the stator laminations having the aforementioned magnetic adjustment holes, each stator tooth has the same number of magnetic adjustment holes of the same shape and size, and the magnetic adjustment holes are located in the same position on the stator tooth.

8. A motor for a compressor, characterized in that, The motor includes a stator structure as described in any one of claims 1-7.

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