A combined stator core and stator

Abstract

The utility model provides a kind of combined stator core and stator, the stator core includes tooth module and yoke module;The outer periphery of the tooth module has a plurality of interval setting stator teeth;The yoke module includes a plurality of stator yokes, and a plurality of the stator yokes are enclosed to form circular ring type;The adjacent end portion on adjacent two the stator yokes corresponds the same the stator tooth, and is respectively welded with the stator tooth connection;A kind of combined stator core provided in the utility model, a plurality of stator teeth are interval setting in the outer periphery of tooth module, so that the inner periphery of tooth module is closed state, greatly reduce air gap permeance harmonic and reduce tooth slot torque, reduce magnetic leakage, reduce vibration noise, improve motor efficiency, realize external winding, more conducive to mechanical winding operation, tooth module and yoke module are welded, process is relatively simple, and better ensure connection stability.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a combined stator core and stator. Background Technology

[0002] Current vertical rotary compressor permanent magnet synchronous motors have slots in their stator cores to facilitate wire insertion. Larger slots make it easier to embed the winding wires, especially for some high-power motors with thicker wire diameters, which require larger slots for automated winding. However, from a performance perspective, because the magnetic flux density in the slots is higher in the inner diameter direction, increasing the slot width increases air gap magnetic permeability harmonics and cogging torque, worsens the air gap magnetic field waveform, increases vibration and noise, and negatively impacts control accuracy. Furthermore, a wider slot increases slot leakage flux, reducing motor efficiency. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this utility model provides a combined stator core and stator, with multiple stator teeth spaced apart on the outer periphery of the tooth module, making the inner periphery of the tooth module closed. This significantly reduces air gap magnetic permeability harmonics and cogging torque, reduces magnetic leakage, lowers vibration and noise, improves motor efficiency, enables external winding, and is more conducive to mechanical winding operations. The tooth module and yoke module are connected by welding, which simplifies the process and better ensures connection stability.

[0004] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a combined stator core, the stator core including a tooth module and a yoke module; The outer periphery of the tooth module has multiple stator teeth spaced apart; The yoke module includes multiple stator yokes, which are enclosed to form a circular ring. The adjacent ends of two adjacent stator yokes correspond to the same stator tooth and are welded to the stator tooth respectively.

[0005] In some implementations, the inner diameter of the toothed module is set to d1, and the value of d1 is in the range of 20mm and d1≤120mm, which is used to adapt to the application range of the stator and meet the assembly requirements of existing products.

[0006] In some implementations, the inner periphery of the tooth module is a closed connection. Let the maximum thickness of the connection between two adjacent stator teeth in the radial direction be h1. The value range of h1 is d1 / 50≤h1≤d1 / 10. This value range can meet the strength requirements of the stator core, ensure the stability of the product, and also ensure a certain magnetic density.

[0007] In some implementations, the maximum outer diameter of the yoke module is set to d2, and the value of d2 is in the range of 40mm≤d2≤200mm, which is used to adapt to the application range of the stator and meet the assembly requirements of existing products.

[0008] In some implementations, a slot is formed between two adjacent stator teeth, and a protrusion is formed on the stator yoke at a position corresponding to the slot, the protrusion being embedded in the slot.

[0009] In some implementations, the included angle between the two opposite sides of the slot is 'a', and the number of slots is 'n'. The relationship between 'a' and 'n' satisfies 'a≥720 / n' and 'a≤160°'. This design allows the tooth module and the yoke module to fit together smoothly, improving connection stability and ease of operation.

[0010] In some implementations, the distance between the two opposite sides of the slot is defined as L, and the value of L is in the range of 3mm ≤ L ≤ 15mm.

[0011] In some implementations, the maximum thickness of the stator yoke in the radial direction is set to h2, and the value of h2 is in the range of 3mm≤h2≤30mm, which meets the strength requirements of the stator core, ensures the stability of the product, and also ensures that it has a certain magnetic density.

[0012] In some implementations, a groove is formed on the end of the stator yoke facing the tooth module, and a boss is formed on the stator tooth corresponding to the position of the groove; A welding groove is formed between the groove and the boss, and the stator teeth and stator yoke are welded together through the welding groove to ensure the connection stability between the stator teeth and stator yoke.

[0013] This utility model also provides a stator, including the stator core described in any of the above claims.

[0014] In summary, this utility model has at least the following advantages: 1. The present invention provides a combined stator core, which modularizes the tooth section and yoke section. Multiple stator teeth are spaced apart on the outer periphery of the tooth section module, making the inner periphery of the tooth section module closed. The winding is performed in the outer periphery direction, which not only greatly reduces air gap magnetic permeability harmonics and reduces tooth cogging torque, reduces magnetic leakage, reduces vibration and noise, and improves motor efficiency, but also facilitates mechanical winding operations. The tooth section module and yoke section module are connected by welding, which is relatively simple and better ensures connection stability.

[0015] 2. The stator provided by this utility model adopts the above-mentioned combined stator core, which greatly reduces air gap magnetic permeability harmonics and reduces cogging torque, reduces magnetic leakage, reduces vibration and noise, improves motor efficiency, and facilitates winding operations. It has been optimized in terms of both performance and process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the stator core provided in Embodiment 1 of this utility model; Figure 2 An exploded view of the stator core provided in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the toothed module provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of the yoke module provided in Embodiment 1 of this utility model; Figure 5 An exploded view of the stator core provided in Embodiment 2 of this utility model; Marked in the image: 100. Stator core; 110. Tooth module; 111. Stator tooth; 1111. Boss; 112. Slot; 120. Yoke module; 121. Stator yoke; 1211. Groove; 122. Protrusion. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Example 1: Please see Figures 1-4 A composite stator core, the stator core including a tooth module 110 and a yoke module 120, the outer periphery of the tooth module 110 having a plurality of stator teeth 111 spaced apart. As known from the background art, existing vertical rotary compressor permanent magnet synchronous motors have slots in their stator cores. These slots are typically located on the inner circumference of the tooth module 110 and are used to embed the winding wires into the slots. However, due to the larger magnetic flux density of the slots in the inner diameter direction, increasing the slot width will increase air gap magnetic permeability harmonics and cogging torque, worsen the air gap magnetic field waveform, increase vibration and noise, and increase the impact on control accuracy. At the same time, a larger slot width will increase slot leakage flux and reduce motor efficiency. Therefore, the combined stator core provided in this embodiment has multiple stator teeth 111 spaced apart on the outer periphery of the tooth module 110. That is, there is a gap between adjacent stator teeth 111 for the embedding of winding wires. This is equivalent to the slot being set in the outer diameter direction. Compared with the prior art, this embodiment uses a closed state for the inner periphery of the tooth module 110. This can reduce air gap magnetic permeability harmonics and reduce tooth cogging torque, reduce magnetic leakage, reduce vibration noise, and improve motor efficiency. In addition, embedding the winding wires from the outer diameter direction can also provide a larger operating space, which is more conducive to mechanical winding operations.

[0022] The yoke module 120 includes multiple stator yokes 121, which are arranged in a ring shape. The adjacent ends of adjacent stator yokes 121 correspond to the same stator tooth 111 and are welded to the stator tooth 111 respectively.

[0023] For example, in one example, there are 4 stator yokes 121, which are arranged in a ring shape. Each stator yoke 121 is arc-shaped and has two ends extending in opposite directions, namely the first end and the second end.

[0024] The adjacent ends of adjacent stator yokes 121 correspond to the same stator tooth 111 and are welded to the stator tooth 111 respectively.

[0025] For ease of understanding, two adjacent stator yokes 121 are defined as the first stator yoke and the second stator yoke, respectively. The first end of the first stator yoke is adjacent to the second end of the second stator yoke, but they do not overlap or interfere with each other.

[0026] The first end of the first stator yoke and the second end of the second stator yoke correspond to the same stator tooth 111 on the tooth module 110, and are respectively welded to the stator tooth 111. For example, there are 4 stator yokes 121 and 12 stator teeth 111, of which 4 stator teeth 111 are used to weld two adjacent stator yokes 121 together.

[0027] Here, welding the end of the stator yoke 121 to the stator tooth 111 ensures the stability of the connection between each stator yoke 121 and the tooth module 110, as well as the balance of the connection effect. This embodiment provides a modular stator core with the tooth section and yoke section designed as modules. Multiple stator teeth 111 are spaced apart on the outer periphery of the tooth section module 110, making the inner periphery of the tooth section module 110 closed. Winding is performed in the outer periphery direction, which not only greatly reduces air gap magnetic permeability harmonics and reduces cogging torque, reduces magnetic leakage, reduces vibration and noise, and improves motor efficiency, but also facilitates mechanical winding operations. The tooth section module 110 and the yoke section module 120 are connected by welding, which is a simple process and better ensures connection stability.

[0028] In some embodiments, the inner diameter of the tooth module 110 is set to d1, and the value range of d1 is 20mm d1≤120mm. This value range is used to adapt to the application range of the stator and meet the assembly requirements of existing products.

[0029] For example, the inner diameter of the tooth module 110 can be 20mm, 70mm or 120mm, which can be adjusted according to actual needs.

[0030] In some embodiments, the inner periphery of the tooth module 110 is a closed connection. The maximum thickness of the connection between two adjacent stator teeth 111 in the radial direction is h1. The value range of h1 is d1 / 50≤h1≤d1 / 10. This value range can meet the strength requirements of the stator core, ensure the stability of the product, and also ensure a certain magnetic density.

[0031] The maximum thickness in the radial direction of the connection between two adjacent stator teeth 111 is limited to meet both strength requirements and magnetic flux density. If the maximum thickness is too large, the magnetic flux density will decrease and the leakage flux will increase, which will reduce the efficiency of the motor and increase the space occupancy rate.

[0032] When the inner diameter of the tooth module 110 is 20mm, 0.4mm≤h1≤2mm; when the inner diameter of the tooth module 110 is 70mm, 1.4mm≤h1≤7mm; when the inner diameter of the tooth module 110 is 120mm, 2.4mm≤h1≤12mm. The specific values ​​can be adjusted according to actual needs.

[0033] In some implementations, the maximum outer diameter of the yoke module 120 is set to d2, and the value of d2 is in the range of 40mm≤d2≤200mm. This numerical range can be used to adapt to the application range of the stator and meet the assembly requirements of existing products.

[0034] For example, the maximum outer diameter of the yoke module 120 can be 40mm, 120mm or 200mm, which can be adjusted according to actual needs.

[0035] In some embodiments, a slot 112 is formed between two adjacent stator teeth 111, and a protrusion 122 is formed on the stator yoke 121 at a position corresponding to the slot 112, the protrusion 122 being embedded in the slot 112. After the slot 112 is used for embedding the winding wire, the protrusion 122 on the stator yoke 121 is then embedded in the slot 112, thereby achieving the fitting connection between the yoke module 120 and the tooth module 110.

[0036] Furthermore, let the included angle between the two opposite sides of the slot 112 be a, and let the number of slots 112 be n. The relationship between the included angle a and n satisfies a≥720 / n and a≤160°. This design allows the tooth module 110 and the yoke module 120 to fit together smoothly, improving connection stability and ease of operation.

[0037] For example, the number of slots 112 is 12, and the included angle α is 60°, 120° or 160°.

[0038] In some implementations, the distance between the two opposite sides of the slot 112 is set to L, and the value of L is in the range of 3mm≤L≤15mm, such as L being 3mm, 9mm or 15mm, to adapt to different winding wire embedding requirements.

[0039] In some implementations, the maximum thickness of the subyoke 121 in the radial direction is set to h2, and the value of h2 is in the range of 3mm≤h2≤30mm. This value is limited to meet the strength requirements of the stator core, ensure the stability of the product, and at the same time ensure that it has a certain magnetic density.

[0040] The maximum thickness of the stator yoke 121 in the radial direction is limited to meet both strength requirements and a certain magnetic flux density. If the maximum thickness is too large, the magnetic flux density will decrease and the leakage flux will increase, which will reduce the efficiency of the motor and increase the space occupancy rate.

[0041] For example, the maximum thickness of the stator yoke 121 in the radial direction can be 3mm, 16.5mm or 30mm, which can be adjusted according to actual needs.

[0042] Example 2: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-4 Based on the above Figure 5 .

[0043] In this embodiment, a groove 1211 is formed on the side of the stator yoke 121 facing the tooth module 110, and a boss 1111 is formed on the stator tooth 111 corresponding to the groove 1211. A welding groove is formed between the groove 1211 and the boss 1111, and the stator tooth 111 and the stator yoke 121 are welded together through the welding groove to ensure the connection stability between the stator tooth 111 and the stator yoke 121.

[0044] Example 3: This embodiment provides a stator, including the stator core provided in Embodiment 1 or Embodiment 2 above. Please refer to [link / reference]. Figures 1-5 .

[0045] The stator core includes a tooth module 110 and a yoke module 120. The outer periphery of the tooth module 110 has a plurality of stator teeth 111 spaced apart. The yoke module 120 includes a plurality of stator yokes 121, which enclose each other to form a ring. The adjacent ends of adjacent stator yokes 121 correspond to the same stator tooth 111 and are welded to the stator tooth 111 respectively.

[0046] For example, in one example, there are 4 stator yokes 121, which are arranged in a ring shape. Each stator yoke 121 is arc-shaped and has two ends extending in opposite directions, namely the first end and the second end.

[0047] The adjacent ends of adjacent stator yokes 121 correspond to the same stator tooth 111 and are welded to the stator tooth 111 respectively.

[0048] For ease of understanding, two adjacent stator yokes 121 are defined as the first stator yoke and the second stator yoke, respectively. The first end of the first stator yoke is adjacent to the second end of the second stator yoke, but they do not overlap or interfere with each other.

[0049] The first end of the first stator yoke and the second end of the second stator yoke correspond to the same stator tooth 111 on the tooth module 110, and are respectively welded to the stator tooth 111. For example, there are 4 stator yokes 121 and 12 stator teeth 111, of which 4 stator teeth 111 are used to weld two adjacent stator yokes 121 together.

[0050] Here, welding the end of the stator yoke 121 to the stator tooth 111 ensures the stability of the connection between each stator yoke 121 and the tooth module 110, as well as the balance of the connection effect. The stator provided in this embodiment adopts the above-mentioned combined stator core, which greatly reduces air gap magnetic permeability harmonics and reduces cogging torque, reduces magnetic leakage, reduces vibration and noise, improves motor efficiency, and facilitates winding operations. It has been optimized in terms of both performance and process.

[0051] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A composite stator core, characterized in that, The stator core (100) includes a tooth module (110) and a yoke module (120). The outer periphery of the tooth module (110) has a plurality of stator teeth (111) spaced apart. The yoke module (120) includes multiple stator yokes (121), which are arranged in a circular shape. The adjacent ends of two adjacent stator yokes (121) correspond to the same stator tooth (111) and are respectively welded to the stator tooth (111).

2. The combined stator core according to claim 1, characterized in that, Let the inner diameter of the toothed module (110) be d1, and the value of d1 is in the range of 20mm d1≤120mm.

3. The combined stator core according to claim 2, characterized in that, The inner circumference of the tooth module (110) is a closed connection. Let the maximum thickness of the connection between two adjacent stator teeth (111) in the radial direction be h1. The value range of h1 is d1 / 50≤h1≤d1 / 10.

4. The combined stator core according to claim 1, characterized in that, Let the maximum outer diameter of the yoke module (120) be d2, and the value range of d2 is 40mm≤d2≤200mm.

5. The combined stator core according to claim 1, characterized in that, A slot (112) is formed between two adjacent stator teeth (111), and a protrusion (122) is formed on the stator yoke (121) at the position corresponding to the slot (112), and the protrusion (122) is embedded in the slot (112).

6. The combined stator core according to claim 5, characterized in that, Let the included angle between the two opposite sides of the slot (112) be a, and let the number of slots (112) be n. The relationship between a and n satisfies a≥720 / n and a≤160°.

7. The combined stator core according to claim 5, characterized in that, Let L be the distance between the two opposite sides of the slot (112), and let L be in the range of 3mm≤L≤15mm.

8. The combined stator core according to claim 5, characterized in that, Let the maximum thickness of the stator yoke (121) in the radial direction be h2, and the value of h2 is in the range of 3mm≤h2≤30mm.

9. The combined stator core according to any one of claims 1-8, characterized in that, A groove (1211) is formed on the side of the stator yoke (121) facing the tooth module (110), and a boss (1111) is formed on the stator tooth (111) corresponding to the position of the groove (1211). A welding groove is formed between the groove (1211) and the boss (1111).

10. A stator, characterized in that, Includes the stator core (100) according to any one of claims 1-9.

Images