Motor and compressor

Abstract

The utility model belongs to the technical field of compressors, and discloses a motor and a compressor. The motor comprises a stator, the stator comprises a stator yoke part, the stator yoke part is annular, a stator tooth root is arranged in the stator yoke part, stator tooth tips are formed on two sides of the end part of the stator tooth root, and at least one group of magnetic adjusting holes is formed in the position deviating from the rotating direction of the motor and close to the stator tooth tips; the problem that in the prior art, noise of a motor providing power for a compressor is large is solved.

Description

Technical Field

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

[0002] As people's consumption levels rise, users are paying more and more attention to the noise level of refrigeration equipment when purchasing and using it, such as air conditioners and refrigerators. The compressor is the core component of refrigerators and air conditioners, while the motor is the main component that provides power to the compressor. The main noise of refrigeration equipment is generated by the compressor. The motor contains a stator, which is made of stacked sheets of electrical steel. At the same time, because the low-order air gap magnetic flux density harmonic components of the stator's magnetic circuit are relatively high during operation, the low-order electromagnetic force of the motor is relatively high during actual operation. This significantly increases the noise of the motor, resulting in the refrigeration equipment generating considerable noise during operation. Utility Model Content

[0003] The purpose of this invention is to provide a motor and a compressor that solves the problem of excessive noise in existing motors that power compressors.

[0004] To achieve this objective, the present invention adopts the following technical solution: The present invention provides an electric motor, including a stator, the stator including a stator yoke, the stator yoke being annular, a stator tooth root being provided inside the stator yoke, stator tooth tips being formed on both sides of the end of the stator tooth root, and at least one set of magnetic adjustment holes being provided opposite to the rotation direction of the motor and close to the stator tooth tips.

[0005] Preferably, the area of ​​the magnetic adjustment hole is S, where S > 0.25 square millimeters.

[0006] Preferably, the cross-section of the magnetic adjustment hole is circular.

[0007] Preferably, the stator is formed by stacking individual pieces, each piece having a magnetic adjustment hole. The total number of individual pieces is K, and the total number of individual pieces with magnetic adjustment holes is Q, where K - Q < 20.

[0008] Preferably, the distance between the magnetic adjustment hole and the tip of the far stator tooth is d2, and the distance between the magnetic adjustment hole and the tip of the near stator tooth is d3, and the condition 5mm≥d2-d3≥0.2mm is met.

[0009] Preferably, the maximum distance point from the magnetic adjustment hole to the center of the stator is set as point A, the side of the stator tooth tip closest to the direction of motor rotation is set as point L1, the side of the stator tooth tip away from the direction of motor rotation is set as point L2, the distance from point A to point L1 is d2, the distance from point A to point L2 is d3, and the condition 5mm≥d2-d3≥0.2mm is met.

[0010] Preferably, the inner diameter of the stator is R, and the maximum distance between the magnetic adjustment hole and the center of the stator is d1, where d1-R≥0.8mm.

[0011] Preferably, the four sets of values ​​d1, d2, d3, and R are d1+d2≥d3+R+1.

[0012] Preferably, a stator slot is provided between every two sets of stator tooth roots, the number of stator slots is Z, the number of electrodes is P, and Z / P = 3 / 2 or Z / P = 6 / 5 is satisfied.

[0013] A compressor includes the motor described above, the motor further including a rotor connected to the compressor, the rotor being inserted into the stator.

[0014] Beneficial effects: By opening magnetic adjustment holes on the stator tooth root, the magnetic circuit reluctance can be changed, the low-order air gap magnetic flux density harmonic components in the magnetic circuit can be reduced, the low-order electromagnetic force during actual motor operation can be reduced, the magnetic field distribution can be improved, and thus the noise of the compressor during operation can be reduced, ultimately reducing the noise of the refrigeration equipment during actual operation. Attached Figure Description

[0015] Figure 1 This is the front view of the stator of this utility model.

[0016] In the diagram: 1. Stator; 11. Stator yoke; 12. Stator tooth root; 13. Stator tooth tip; 14. Stator slot; 2. Magnetizing hole. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] In the current technology, the motor provides the power for the compressor to rotate. However, during the high-speed operation of the motor, due to the high harmonic components of the low-order air gap magnetic flux density in the stator magnetic circuit, the motor has a large harmonic electromagnetic force, which will generate a lot of operating noise. This will cause users to experience a lot of noise when using refrigeration equipment, reducing the user experience.

[0022] To solve the above problems, such as Figure 1 As shown, this utility model provides a motor, including a stator 1. The stator 1 includes a stator yoke 11 and stator tooth roots 12. The stator yoke 11 is annular, and stator tooth roots 12 are provided on the inner side of the stator yoke 11. Stator tooth tips 13 are formed on both sides of the ends of the stator tooth roots 12, which are opposite to the rotation direction of the motor and (as shown in the figure). Figure 1 At least one set of magnetic adjustment holes 2 is provided near the stator tooth tip 13 (as shown by the arc arrow).

[0023] The stator yoke 11 of this invention is annular, and stator tooth roots 12 are provided on the inner side of the stator yoke 11. Stator slots 14 are formed between the stator tooth roots 12. At a position near the stator tooth tip 13, a magnetic adjustment hole 2 is provided on the positioning tooth root. The magnetic adjustment hole 2 can change the magnetic field distribution of the motor, optimize the air gap magnetic flux density, and reduce the low-order air gap magnetic flux density harmonic components in the stator magnetic circuit. This reduces the harmonic electromagnetic force of the motor, ultimately reducing the noise of the motor during the compressor drive process and improving the user experience. The area of ​​the magnetic adjustment hole 2 is S, where S > 0.25 square millimeters. If the area of ​​the magnetic adjustment hole 2 is small, the processing difficulty is high. Increasing the area of ​​the magnetic adjustment hole 2 can reduce the difficulty of drilling. At the same time, the larger the drilling area, the greater the reduction of the low-order air gap magnetic flux density harmonic components, thereby further reducing noise.

[0024] In the refrigeration equipment, a rotor is inserted into the motor. The rotor is rotatably connected to the compressor. The rotor is inserted into the stator 1 and rotates under the action of the stator 1 to provide power to the compressor. Because the magnetic adjustment hole 2 is opened, the noise generated by the refrigeration equipment can be reduced when the refrigeration equipment is running.

[0025] It should be noted that the cross-section of the magnetic adjustment hole 2 of this utility model is circular, and its opening method is simpler and easier for workers to process. It can also be other shapes, such as triangle, rectangle or L-shape, as long as the area of ​​the magnetic adjustment hole 2 is greater than S, other shapes can be used.

[0026] The stator 1 of this invention is formed by stacking individual pieces. Each piece has a magnetic adjustment hole 2 at the same position. After the pieces are stacked, the positions of the magnetic adjustment holes 2 coincide, forming magnetic adjustment holes 2 on the stator 1. This reduces the low-order air gap magnetic flux density harmonic components and lowers the noise generated by the compressor. The total number of individual pieces in this invention is K, and the total number of individual pieces with magnetic adjustment holes 2 is Q. K - Q < 20. It is necessary to ensure that the total number of individual pieces with magnetic adjustment holes 2 is within 20 pieces. This can effectively change the magnetic field distribution of the motor, optimize the air gap magnetic flux density, reduce the low-order air gap magnetic flux density harmonic components, and improve the noise reduction effect.

[0027] The distance between the magnetic adjustment hole 2 and the far stator tooth tip 13 is d2, and the distance between the magnetic adjustment hole 2 and the near stator tooth tip 13 is d3, satisfying 5mm≥d2-d3≥0.2mm. Specifically, the maximum distance point from the magnetic adjustment hole 2 to the center of the stator 1 is set as point A, the side of the stator tooth tip 13 closest to the motor rotation direction is set as point L1, and the side of the stator tooth tip 13 away from the motor rotation direction is set as point L2. The distance from point A to point L1 is d2, and the distance from point A to point L2 is d3, satisfying 5mm≥d2-d3≥0.2mm. By specifying d2 and d3, it can be ensured that the magnetic adjustment hole 2 is located on one side of the stator tooth tip 13. Only on the side of the stator tooth tip 13 can the low-order air gap magnetic flux density harmonic components be changed. Under the constraint of the two sets of values ​​d2 and d3, the strength of the stator tooth tip 13 can be guaranteed, and the stator tooth tip 13 can be prevented from breaking during operation, ensuring that the strength of the stator tooth tip 13 is within the specified range.

[0028] The inner diameter of stator 1 is R, and the maximum distance between the magnetic adjustment hole 2 and the center of stator 1 is d1. That is, the distance between point A and the center of stator 1 is d1, and d1-R≥0.8mm. This avoids the magnetic adjustment hole 2 being too close to the end of the stator tooth tip 13, so that the stator tooth tip 13 can maintain sufficient strength during operation. The four sets of values ​​d1, d2, d3, and R are d1+d2≥d3+R+1, so that the reduction in strength of the stator tooth tip 13 by the magnetic adjustment hole 2 is minimized, thereby reducing the impact on the strength of the motor itself.

[0029] A stator slot 14 is provided between every two sets of stator tooth roots 12. The number of stator slots 14 is Z, and the number of electrodes is P. The Z / P ratio is 3 / 2 or 6 / 5. The design method of this utility model is applicable to 6-pole 9-slot motors, 8-pole 12-slot motors and 10-pole 12-slot motors. It has a wide range of applications and can be appropriately adjusted for different motors, making it more versatile.

[0030] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric machine characterized in that, The motor comprises a stator (1), the stator (1) comprises a stator yoke (11), the stator yoke (11) is annular, a stator tooth root (12) is arranged in the stator yoke (11), and a stator tooth tip (13) is formed on both sides of the end of the stator tooth root (12); at least one group of magnetic adjustment holes (2) are arranged away from the rotating direction of the motor and close to the stator tooth tip (13).

2. The electric machine of claim 1, wherein, The area of the magnetic adjustment hole (2) is S, and S>0.25 square millimeters.

3. The electric machine of claim 2, wherein, The cross section of the magnetic adjustment hole (2) is circular.

4. The electric machine of claim 1, wherein, The stator (1) is formed by stacking the pieces, the pieces are provided with the magnetic adjustment holes (2), the total number of the pieces is K, the total number of the pieces provided with the magnetic adjustment holes (2) is Q, and K-Q<20.

5. The electric machine of claim 1, wherein, The distance between the magnetic adjustment hole (2) and the distal stator tooth tip (13) is d2, the distance between the magnetic adjustment hole (2) and the proximal stator tooth tip (13) is d3, and 5mm≥d2-d3≥0.2mm is satisfied.

6. The electric machine of claim 5, wherein, The maximum distance point of the magnetic adjustment hole (2) to the center of the stator (1) is set as point A, the side of the stator tooth tip (13) close to the rotating direction of the motor is set as point L1, and the side of the stator tooth tip (13) away from the rotating direction of the motor is set as point L2; the distance between the point A and the point L1 is d2, the distance between the point A and the point L2 is d3, and 5mm≥d2-d3≥0.2mm is satisfied.

7. The electric machine of claim 6, wherein, The inner diameter of the stator (1) is R, the maximum distance of the magnetic adjustment hole (2) to the center of the stator (1) is d1, and d1-R≥0.8mm is satisfied.

8. The electric machine of claim 7, wherein, The four groups of values of d1, d2, d3 and R satisfy d1+d2≥d3+R+1.

9. The electric machine of claim 1, wherein, A stator slot (14) is arranged between every two groups of stator tooth roots (12), the number of the stator slots (14) is Z, the number of the electrodes is P, and Z / P=3 / 2 or Z / P=6 / 5 is satisfied.

10. A compressor characterized by, The motor comprises the motor of any one of claims 1-9, further comprising a rotor, the rotor is connected with a compressor, and the rotor is inserted into the stator (1).

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