Permanent magnet synchronous motor stator

Abstract

The utility model relates to a permanent magnet synchronous motor stator, and belongs to the field of motors, the permanent magnet synchronous motor stator comprises a stator shell and stator teeth, the stator teeth and the stator shell are detachably connected, one end, far away from the stator shell, of each stator tooth is fixedly connected with a connecting ring, and stator grooves are formed among the stator shell, the connecting ring and two adjacent stator teeth. According to the motor, the stator groove with the closed periphery is formed among the stator shell, the connecting ring and the two adjacent stator teeth, the counter electromotive force is improved, the possibility of magnetic leakage is reduced, and the torque ripple of the motor is reduced, so that vibration and noise are reduced, and the performance of the motor is improved.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a stator of a permanent magnet synchronous motor. Background Art

[0002] The permanent magnet synchronous motor uses permanent magnets to provide excitation, making the motor structure relatively simple, reducing processing and assembly costs, and eliminating the slip rings and brushes that are prone to problems, improving the reliability of the motor operation; also, because there is no need for excitation current and no excitation loss, the efficiency and power density of the motor are improved. The permanent magnet synchronous motor mainly consists of components such as a rotor, an end cover, and a stator. In related technologies, the stator includes a stator housing and stator teeth. The stator teeth are fixedly connected inside the stator housing, and a stator slot is formed between the stator teeth and the stator housing. However, the current permanent magnet synchronous motor has large torque fluctuations during operation, obvious vibration and noise, low back electromotive force, and a high possibility of magnetic leakage, reducing the service life of the motor and affecting the user experience. Summary of the Utility Model

[0003] In order to improve the above problems, the present application provides a stator of a permanent magnet synchronous motor.

[0004] The stator of a permanent magnet synchronous motor provided by the present application adopts the following technical solution:

[0005] A stator of a permanent magnet synchronous motor includes a stator housing and stator teeth. The stator teeth are detachably connected to the stator housing. A connecting ring is fixedly connected to one end of the stator teeth away from the stator housing. A stator slot is formed between the stator housing, the connecting ring, and two adjacent stator teeth.

[0006] By adopting the above technical solution, the stator teeth and the stator housing are detachable, and a stator slot that is closed on all sides is formed between the stator housing, the connecting ring, and two adjacent stator teeth, improving the back electromotive force, reducing the possibility of magnetic leakage, reducing the torque fluctuation of the motor, thereby reducing vibration and noise, improving the performance of the motor, extending the service life of the motor, and facilitating the use of the motor.

[0007] Preferably, an embedding groove is formed on the inner wall of the stator housing, and an embedding block is fixedly connected to the stator teeth. The embedding groove is for the embedding block to be embedded.

[0008] By adopting the above technical solution, when it is necessary to connect the stator teeth and the stator housing, the operator can move the stator teeth. The movement of the stator teeth can drive the movement of the embedding block, so that the embedding block moves into the embedding groove. The embedding groove can limit the embedding block, thereby limiting the stator teeth and realizing the installation of the stator teeth and the stator housing; since the stator slot is set to be a closed type, it is not convenient for winding, so the stator housing and the stator teeth are set to be a splicing type.

[0009] Preferably, extension grooves are formed on the groove walls of the stator slots.

[0010] By adopting the above technical solution, through the arrangement of the extension grooves, the space area inside the stator slots can be increased, thereby increasing the number of windings in the stator slots and improving the performance of the motor.

[0011] Preferably, a limiting block is provided on the embedding block, a limiting groove is formed at the bottom of the embedding groove, and the limiting block is embedded in the limiting groove.

[0012] By adopting the above technical solution, when the embedding block is embedded in the embedding groove, the limiting block is embedded in the limiting groove, and the limiting groove can limit the limiting block, thereby further limiting the embedding block and improving the stability of the embedding block, which is convenient for the stable connection between the stator teeth and the stator housing.

[0013] Preferably, a connecting block is fixedly connected to the limiting block, a connecting groove is formed on the connecting block, and the groove wall of the connecting groove is fixedly connected to the embedding block.

[0014] By adopting the above technical solution, the connecting block can relatively fix the embedding block and the limiting block, and through the arrangement of the connecting groove, the groove wall of the connecting groove fits the contour of the embedding block, which is convenient for the fixed connection between the connecting block and the embedding block.

[0015] Preferably, a limiting strip is fixedly connected to the inner wall of the stator housing at the notch of the embedding groove, and the limiting strip is in contact with the stator teeth.

[0016] By adopting the above technical solution, when the stator teeth and the stator housing are installed, the limiting strip is in contact with the stator teeth, and the limiting strip can limit the stator teeth, reducing the possibility of the stator teeth shifting and improving the position accuracy of the stator teeth.

[0017] Preferably, a positioning strip is fixedly connected to the limiting strip, a positioning groove is formed on the stator teeth, and the positioning strip is embedded in the positioning groove.

[0018] By adopting the above technical solution, when the limiting strip is in contact with the stator teeth, the positioning strip is embedded in the positioning groove, and the positioning strip can limit the stator teeth, further improving the position accuracy of the stator teeth.

[0019] Preferably, a plurality of auxiliary grooves are formed on the outer wall of the stator housing.

[0020] By adopting the above technical solution, when the interference fit strength between the stator housing and the compressor cylinder body is sufficient, through the arrangement of the auxiliary grooves, a passage with a certain area can be formed, which is beneficial to the oil circuit circulation inside the compressor.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By providing the stator housing, stator teeth, and connecting ring, the stator teeth and the stator housing are detachable. Moreover, a stator slot that is enclosed on all four sides is formed between the stator housing, the connecting ring, and two adjacent stator teeth, which increases the back electromotive force, reduces the possibility of magnetic leakage, decreases the torque ripple of the motor, thereby reducing vibration and noise, improving the performance of the motor, extending the service life of the motor, and facilitating the use of the motor.

[0023] 2. By providing the embedding blocks and embedding slots, when it is necessary to connect the stator teeth and the stator housing, the operator can move the stator teeth. The movement of the stator teeth can drive the movement of the embedding blocks, causing the embedding blocks to move into the embedding slots. The embedding slots can limit the embedding blocks, thereby limiting the stator teeth and achieving the installation of the stator teeth and the stator housing. Since the stator slot is set to be a closed type, it is not convenient for winding, so the stator housing and the stator teeth are set to be a splicing type.

[0024] 3. By providing the limiting blocks and limiting slots, when the embedding blocks are embedded in the embedding slots, the limiting blocks are embedded in the limiting slots. The limiting slots can limit the limiting blocks, thereby further limiting the embedding blocks, improving the stability of the embedding blocks, and facilitating the firm connection of the stator teeth and the stator housing. Description of the Drawings

[0025] Figure 1 is a schematic diagram of the overall structure of the permanent magnet synchronous motor stator in Embodiment 1 of the present application for illustration.

[0026] Figure 2 is a schematic diagram of the qualified problem structure of the permanent magnet synchronous motor stator in Embodiment 2 of the present application for illustration.

[0027] Figure 3 is Figure 2 a partial enlarged structure schematic diagram of part A in

[0028] Description of the reference numerals: 1, stator housing; 11, embedding slot; 12, limiting slot; 13, limiting strip; 131, positioning strip; 14, auxiliary slot; 2, stator teeth; 21, embedding block; 22, limiting block; 23, connecting block; 231, connecting slot; 24, positioning slot; 3, connecting ring; 4, stator slot; 41, extension slot. Detailed Embodiment

[0029] To make the invention purpose, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] The following further elaborates on this application in conjunction with the attached Figures 1 - 3 drawings for a more detailed description.

[0031] Embodiment 1:

[0032] An embodiment of this application discloses a stator of a permanent magnet synchronous motor. As Figure 1 shown, it includes a stator housing 1 and a plurality of stator teeth 2. The plurality of stator teeth 2 are detachably connected to the stator housing 1. The plurality of stator teeth 2 are all located within the stator housing 1 and are evenly arranged in a ring along the axis of the stator housing 1. One end of the stator tooth 2 away from the stator housing 1 is fixedly connected with a connecting ring 3, and the axial direction of the connecting ring 3 is the same as the axial direction of the stator housing 1.

[0033] As Figure 1 shown, one end of the stator tooth 2 away from the connecting ring 3 is fixedly connected with an embedding block 21. The cross-section of the embedding block 21 is triangular. An embedding groove 11 for the embedding block 21 to be embedded is provided on the inner wall of the stator housing 1. When installing the stator tooth 2 and the stator housing 1, an operator can move the connecting ring 3. The movement of the connecting ring 3 can drive the movement of the stator tooth 2, and the movement of the stator tooth 2 can drive the movement of the embedding block 21, so that the embedding block 21 moves into the embedding groove 11. The embedding groove 11 can limit the embedding block 21, thereby limiting the stator tooth 2 and realizing the installation of the stator tooth 2 and the stator housing 1.

[0034] As Figure 1 shown, a stator slot 4 is formed between the stator housing 1, the connecting ring 3 and two adjacent stator teeth 2. Winding can be carried out in the stator slot 4; an extension groove 41 is provided on the groove wall of the stator slot 4. Through the setting of the extension groove 41, the space area of the stator slot 4 is increased, thereby increasing the number of windings in the stator slot 4 and improving the performance of the motor.

[0035] The implementation principle of a stator of a permanent magnet synchronous motor in an embodiment of this application is as follows:

[0036] An operator can move the connecting ring 3 to drive the movement of the stator tooth 2. The movement of the stator tooth 2 can drive the movement of the embedding block 21, so that the embedding block 21 moves into the embedding groove 11. The embedding groove 11 can limit the embedding block 21, thereby limiting the stator tooth 2 and realizing the installation of the stator tooth 2 and the stator housing 1; through the setting of the extension groove 41, the space area of the stator slot 4 is increased, thereby increasing the number of windings in the stator slot 4 and improving the performance of the motor.

[0037] Embodiment 2:

[0038] As Figure 2 and 3As shown in the figure, in the embodiment of the present application based on Embodiment 1, a connecting block 23 is provided on the embedding block 21. A connecting groove 231 is formed in the connecting block 23, and the groove wall of the connecting groove 231 is fixedly connected to the embedding block 21. One side of the connecting block 23 away from the embedding block 21 is fixedly connected with a limiting block 22. A limiting groove 12 is formed at the bottom of the embedding groove 11 for the limiting block 22 to be embedded. Through the arrangement of the connecting groove 231, the groove wall of the connecting groove 231 fits the contour of the embedding block 21, facilitating the fixed connection between the connecting block 23 and the embedding block 21. When the embedding block 21 is located in the embedding groove 11, the limiting block 22 is located in the limiting groove 12, and the limiting groove 12 can limit the limiting block 22, thereby limiting the embedding block 21, further limiting the stator tooth 2, facilitating the stable connection between the stator tooth 2 and the stator housing 1, and improving the stability between the stator tooth 2 and the stator housing 1.

[0039] As Figure 2 and 3 shown, a plurality of limiting strips 13 are fixedly connected to the inner wall of the stator housing 1 and at the notch of the embedding groove 11. The limiting strips 13 are located on both sides of the stator tooth 2. A positioning strip 131 is fixedly connected to the limiting strip 13, and a positioning groove 24 is formed in the stator tooth 2 for the positioning strip 131 to be embedded. After the stator tooth 2 and the stator housing 1 are connected, the limiting strip 13 fits the stator tooth 2, and the limiting strips 13 on both sides of the stator tooth 2 can limit the stator tooth 2, reducing the possibility of the stator tooth 2 shifting. When the limiting strip 13 fits the stator tooth 2, at this time, the positioning strip 131 is located in the positioning groove 24, and the positioning strip 131 can limit the stator tooth 2, further reducing the possibility of the stator tooth 2 shifting and improving the position accuracy of the stator tooth 2.

[0040] As Figure 2 shown, a plurality of auxiliary grooves 14 are formed in the outer wall of the stator housing 1, and the center lines of the auxiliary grooves 14 are collinear with the center line of the stator tooth 2. When the interference fit strength between the stator housing 1 and the compressor cylinder is sufficient, through the arrangement of the auxiliary grooves 14, a certain area of passage can be formed, facilitating the oil circuit circulation inside the compressor.

[0041] The implementation principle of the stator of the permanent magnet synchronous motor in the embodiment of the present application is as follows:

[0042] When the embedding block 21 is located in the embedding groove 11, the limiting block 22 is located in the limiting groove 12, and the limiting groove 12 can limit the limiting block 22, thereby further limiting the embedding block 21, improving the stability between the stator tooth 2 and the stator housing 1. After the stator tooth 2 and the stator housing 1 are connected, the limiting strip 13 can limit the stator tooth 2, and the positioning strip 131 can also limit the stator tooth 2, reducing the possibility of the stator tooth 2 shifting and improving the position accuracy of the stator tooth 2.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A permanent magnet synchronous motor stator, comprising a stator housing (1) and stator teeth (2), characterized in that: The stator tooth (2) and the stator housing (1) are detachably connected, one end of the stator tooth (2) away from the stator housing (1) is fixedly connected to a connecting ring (3), and a stator slot (4) is formed between the stator housing (1), the connecting ring (3) and two adjacent stator teeth (2).

2. A permanent magnet synchronous motor stator according to claim 1, characterized in that: An embedding groove (11) is provided on the inner wall of the stator housing (1), an embedding block (21) is fixedly connected to the stator tooth (2), and the embedding groove (11) is used for embedding the embedding block (21).

3. A permanent magnet synchronous motor stator according to claim 1, characterized in that: An extension groove (41) is provided on the groove wall of the stator groove (4).

4. A permanent magnet synchronous motor stator according to claim 2, characterized in that: A limiting block (22) is provided on the embedding block (21), and a limiting groove (12) is provided at the bottom of the embedding groove (11), wherein the limiting groove (12) is embedded in the limiting block (22).

5. A permanent magnet synchronous motor stator according to claim 4, characterized in that: The limiting block (22) is fixedly connected to a connecting block (23), the connecting block (23) is provided with a connecting groove (231), and the groove wall of the connecting groove (231) is fixedly connected to the embedding block (21).

6. A permanent magnet synchronous motor stator according to claim 2, characterized in that: A limit strip (13) is fixedly connected to the inner wall of the stator housing (1) and located at the notch of the embedding slot (11), and the limit strip (13) fits the stator teeth (2).

7. A permanent magnet synchronous motor stator according to claim 6, characterized in that: A positioning strip (131) is fixedly connected to the limiting strip (13), and a positioning groove (24) is provided on the stator tooth (2), wherein the positioning strip (131) is embedded in the positioning groove (24).

8. The permanent magnet synchronous motor stator according to claim 1, characterized in that: A plurality of auxiliary grooves (14) are provided on the outer wall of the stator housing (1).

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