Stator structure, motor and compressor

Abstract

The utility model provides a kind of stator structure, motor and compressor, including stator core, the stator core includes stator yoke, the stator yoke has inner periphery and outer periphery, multiple entry slot holes are distributed with the interval along the circumferential direction of the inner periphery, one stator tooth is defined between adjacent two entry slot holes;Multiple arc notches, multiple the arc notches are distributed with the interval along the circumferential direction of the outer periphery, each the position of the arc notch corresponds each stator tooth;The center line of the stator tooth passes through the center of the inner periphery and the center of the arc notch, the center of the arc notch is located on the outer periphery;The utility model can avoid that stator core local magnetic density increases, effectively reduce the loss of stator core, improve motor and compressor efficiency.

Description

Technical Field

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

[0002] Currently, squirrel-cage induction motors are commonly used in rotary AC fixed-frequency compressors. When designing this type of compressor and motor, increasing the refrigerant flow area is typically employed to improve the compressor's cooling capacity and reduce power consumption.

[0003] To increase the flow area, it is usually necessary to add a tangential edge to the outer periphery of the stator core. For example... Figure 1 As shown, the outer periphery of the stator core has a larger cut-off area. The smaller the values ​​of the width W1 of cut-off edge 1 and the width W2 of cut-off edge 2, although it can increase the internal flow area of ​​the compressor, it will also reduce the area of ​​the stator core yoke, thereby increasing the magnetic flux density of the stator core yoke, ultimately leading to increased stator core losses and decreased motor efficiency.

[0004] Therefore, optimizing the stator core to reduce stator core losses and improve motor efficiency while ensuring that the compressor refrigerant flow area meets design requirements has become a key technology in the development of induction motors. Summary of the Invention

[0005] To address the shortcomings of the prior art, this utility model provides a stator structure, a motor, and a compressor that can avoid local magnetic flux density increase in the stator core, effectively reduce stator core losses, and improve the efficiency of the motor and compressor.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a stator structure, including: A stator core, the stator core including a stator yoke, the stator yoke having an inner circumference and an outer circumference, a plurality of wire inlet slots being distributed circumferentially along the inner circumference, and a stator tooth being defined between two adjacent wire inlet slots; Multiple arc notches are distributed at intervals along the circumference of the outer periphery, and each arc notch corresponds to the position of each stator tooth. The centerline of the stator tooth passes through the center of the inner circumference and the center of the arc notch, and the center of the arc notch is located on the outer circumference.

[0007] In some implementations, the diameter of the inner circumference is D1, the radius of the arc notch is R3, and the ratio of D1 to R3 is greater than or equal to 16.3 and less than or equal to 26. While ensuring smooth refrigerant flow, this can effectively prevent the increase of local magnetic flux density in the stator core, reduce stator core losses, and improve the efficiency of the motor and compressor.

[0008] In some implementations, the diameter of the outer perimeter is D2, the radius of the arc notch is R3, and the ratio of D2 to R3 is greater than or equal to 36.3 and less than or equal to 51. While ensuring smooth refrigerant flow, this can effectively prevent the increase of local magnetic flux density in the stator core, reduce stator core losses, and improve the efficiency of the motor and compressor.

[0009] In some implementations, the radius of the arc notch is R3, the width of the stator tooth is W3, and the ratio of R3 to W3 is greater than or equal to 0.55 and less than or equal to 0.85. While ensuring smooth refrigerant flow, this can effectively prevent the local magnetic flux density increase of the stator core, reduce stator core losses, and improve the efficiency of the motor and compressor.

[0010] In some implementations, the stator core is formed by stacking multiple stator laminations, making the stator core a monolithic structure and improving stability.

[0011] In another aspect of this application, an electric motor is provided, including a rotor structure and a stator structure as described in any of the above claims, wherein the rotor structure is mounted axially within the inner circumference to achieve a mating relationship between the rotor structure and the stator structure.

[0012] Some implementations also include winding components; The winding assembly is disposed in multiple wire inlet slots to realize the cooperation relationship between the winding assembly and the stator structure.

[0013] In some implementations, the two poles of the winding assembly are symmetrically distributed with a preset X-axis or Y-axis as the axis of symmetry, maximizing the utilization of the magnetic field and ensuring the energy conversion efficiency and operational stability of the motor.

[0014] In some implementations, a housing is also included, and the stator structure is disposed within the housing; The arc notch forms a channel for refrigerant flow between itself and the housing, which helps to reduce the motor temperature.

[0015] In another aspect of this application, a compressor is provided, including a housing, a pump assembly, and the motor described above; Both the pump assembly and the motor are housed within the outer casing. The pump assembly drives the refrigerant to flow, allowing the refrigerant to circulate within the channel, thereby cooling the motor temperature inside the compressor.

[0016] In summary, this utility model has at least the following advantages: 1. The stator structure provided by this utility model has multiple arc-shaped notches distributed circumferentially around the outer periphery of the stator core, which makes the outer periphery of the stator yoke uniform and can effectively avoid local magnetic flux density increase in the stator core, thereby reducing the loss of the stator core and improving the efficiency of the motor and compressor.

[0017] 2. The motor provided by this utility model adopts the above-mentioned stator structure. Compared with the prior art, under the premise of comparable flow area, the contact area between the outer periphery of the stator core and the housing is larger, which can improve the stability and reliability of the whole machine assembly. Moreover, by adjusting the radius of the arc notch, the magnetic field distribution of the stator core can be changed, the stator magnetic flux density of the stator core can be reduced, thereby reducing the loss of the stator core and achieving the purpose of reducing the input power of the motor and increasing the maximum torque of the motor. 3. The compressor provided by this utility model adopts the above-mentioned motor, which makes the refrigerant flow more smoothly during the operation of the compressor, and can further reduce the motor temperature inside the compressor, thereby improving the motor efficiency and compressor efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stator core structure mentioned in the background section; Figure 2 This is a schematic diagram of the stator structure provided in Embodiment 1 of the present utility model; Figure 3 A diagram showing the relationship between the radius of the arc notch and the stator core loss in Embodiment 1 of this utility model; Figure 4 A diagram showing the relationship between the radius of the arc notch and the motor input power in Embodiment 1 of this utility model; Figure 5 A diagram showing the relationship between the radius of the arc notch and the motor efficiency provided in Embodiment 1 of this utility model; Figure 6 A diagram showing the relationship between the radius of the arc notch and the maximum torque of the motor, provided for Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the structure of the motor provided in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the compressor provided in Embodiment 3 of this utility model; Marked in the image: 100. Stator core; 110. Stator yoke; 120. Wire inlet slot; 130. Stator tooth; 140. Arc notch; 200. Rotor structure; 300. Housing; 400, Channel; 500. Electric motor; 600. Pump body assembly; 700. Compressor. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Example 1: Please see Figure 2A stator structure includes a stator core 100, which is in the shape of a ring. The stator core 100 includes a stator yoke 110, which has an inner circumference and an outer circumference. The centers of the inner and outer circumferences are the same. Multiple wire inlet slots 120 are distributed at intervals along the circumferential direction of the inner circumference. A stator tooth 130 is defined between two adjacent wire inlet slots 120. The wire inlet slots 120 are used for inserting winding assemblies, and the stator tooth 130 is used for winding the winding assemblies. The stator yoke 110 concentrates the magnetic flux transmitted by the stator tooth 130 and conducts it uniformly along the circumferential direction to form a closed magnetic circuit, ensuring a stable magnetic field distribution and providing a basis for motor energy conversion.

[0024] Multiple arc-shaped notches 140 are distributed circumferentially along the outer perimeter, with each arc-shaped notch 140 corresponding to the position of each stator tooth 130. The centerline of the stator tooth 130 passes through the center of the inner perimeter and the center of the arc-shaped notch 140, and the center of the arc-shaped notch 140 is located on the outer perimeter.

[0025] In the specific forming process, the positional relationship between a stator tooth 130 and an arc-shaped notch 140 is described here. Specifically, starting from the center O1 of the inner circumference of the stator yoke 110, a ray is drawn at a specified angle as the center line L1 of the stator tooth 130. The stator teeth 130 on both sides of the center line L1 are symmetrical. The center line L1 extends to the outer circumference of the stator yoke 110 and intersects with the outer circumference of the stator yoke 110. This intersection is set as the center O2 of the arc-shaped notch 140. An arc with a certain radius is drawn from this center and intersects with the outer circumference of the stator yoke 110. The area enclosed by the intersection of the arc and the outer circumference of the stator yoke 110 is cut off, thus forming the arc-shaped notch 140. There are multiple notches, each arc-shaped notch corresponding to the position of each stator tooth 130, and they are all evenly distributed in a circle with the center O1 of the inner circumference of the stator yoke 110 as the center.

[0026] In one example, there are 20 stator teeth 130 and 20 arc notches 140. The 20 stator teeth 130 are evenly spaced along the inner circumference of the stator yoke 110, and the 20 arc notches 140 are evenly spaced along the outer circumference of the stator yoke 110.

[0027] This embodiment provides a stator structure in which multiple semi-circular notches 140 are distributed circumferentially around the outer periphery of the stator core 100. These notches ensure uniform outer circumferential dimensions of the stator yoke 110, effectively preventing localized increases in magnetic flux density within the stator core 100, thereby reducing losses and improving the efficiency of the motor and compressor. Compared to existing technologies, with a comparable flow area, the contact area between the outer periphery of the stator core 100 and the housing 300 is larger, improving the stability and reliability of the overall assembly. Furthermore, by adjusting the radius of the notches 140, the magnetic field distribution of the stator core 100 can be altered, reducing the stator magnetic flux density and thus lowering losses. This achieves the goal of reducing motor input power and increasing maximum motor torque.

[0028] In some embodiments, the inner circumference diameter is D1, the radius of the arc notch 140 is R3, and the ratio of diameter D1 to radius R3 is greater than or equal to 16.3 and less than or equal to 26. While ensuring smooth refrigerant flow, this can better avoid local magnetic flux density increase in stator core 100, effectively reduce stator core 100 losses, and improve motor and compressor efficiency.

[0029] For example, in one example, the diameter D1 is 45.5 mm and the radius R3 is 2.6 mm, so the ratio of diameter D1 to radius R3 is 17.5, or the diameter D1 is 45.5 mm and the radius R3 is 2.2 mm, so the ratio of diameter D1 to radius R3 is 20.7.

[0030] In some embodiments, the outer diameter is D2, the radius of the arc notch 140 is R3, and the ratio of diameter D2 to radius R3 is greater than or equal to 36.3 and less than or equal to 51. While ensuring smooth refrigerant flow, this can better avoid local magnetic flux density increase in stator core 100, effectively reduce stator core 100 losses, and improve motor and compressor efficiency.

[0031] For example, in one example, the diameter D2 is 94.4 mm and the radius R3 is 2.6 mm, so the ratio of diameter D2 to radius R3 is 36.3, or the diameter D2 is 130 mm and the radius R3 is 2.6 mm, so the ratio of diameter D2 to radius R3 is 50.

[0032] In some embodiments, the radius of the arc notch 140 is R3, the width of the stator tooth 130 is W3, and the ratio of R3 to W3 is greater than or equal to 0.55 and less than or equal to 0.85. While ensuring smooth refrigerant flow, this can effectively prevent the local magnetic flux density of the stator core 100 from increasing, thereby effectively reducing the loss of the stator core 100 and improving the efficiency of the motor and compressor.

[0033] For example, in one example, the radius R3 is 2.6mm and the width W3 is 4.6mm, so the ratio of radius R3 to width W3 is 0.57, or the radius R3 is 2.6mm and the width W3 is 3.2mm, so the ratio of radius R3 to width W3 is 0.81.

[0034] refer to Figures 3-6 , Figure 3 The diagram shown is a correlation diagram between the radius R3 of the arc notch 140 and the loss of the stator core 100. Figure 4 The diagram shown is a correlation between the radius R3 of the arc notch 140 and the motor input power. Figure 5 The diagram shown is a correlation between the radius R3 of the arc notch 140 and the motor efficiency. Figure 6 The diagram shown is a correlation between the radius R3 of the arc notch 140 and the maximum torque of the motor.

[0035] In some embodiments, the stator core 100 is formed by stacking multiple stator laminations, so that the stator core 100 presents an integral structure, thereby improving stability.

[0036] The stator laminations are made of silicon steel sheets, which inherently possess low iron loss characteristics. Through stacking, the losses of the stator core 100 can be further reduced, preventing excessive heat generation and efficiency reduction during motor operation due to excessive losses. The stator laminations are formed by die stamping, resulting in high dimensional accuracy. During stacking, they are aligned according to a unified standard, ensuring the concentricity of the inner and outer circles of the stator core 100, as well as the uniformity of the size distribution. This lays the foundation for the subsequent integration of the winding assembly and the rotor structure 200.

[0037] Example 2: In another aspect of this application, an electric motor 500 is provided, in reference to Figure 2 Based on, refer to Figure 7 .

[0038] An electric motor 500 includes a rotor structure 200 and a stator structure as described in Embodiment 1. The rotor structure 200 is mounted in the inner circumference along the axial direction to realize the mating relationship between the rotor structure 200 and the stator structure.

[0039] In some embodiments, a winding assembly is also included; the winding assembly is disposed within a plurality of inlet slots 120 to realize the mating relationship between the winding assembly and the stator structure.

[0040] When current is applied to the winding assembly, a magnetic field is generated. The rotor structure 200 is in the magnetic field generated by the stator structure. According to the principle of electromagnetic induction, an electromotive force is induced in the rotor structure 200 and a current is formed, which in turn generates a driving torque, causing the rotor structure 200 to rotate.

[0041] Furthermore, the two poles of the winding assembly are symmetrical about a preset X-axis or Y-axis, wherein the X-axis and Y-axis are perpendicular and both are axes passing through the center of the circle and the center lines of the two opposite stator teeth. By winding the two poles of the winding assembly about the preset X-axis or Y-axis, the winding assembly presents a symmetrical distribution, maximizing the utilization of the magnetic field and ensuring the energy conversion efficiency and operational stability of the motor.

[0042] In some embodiments, the motor also includes a housing 300, and a stator structure is disposed within the housing 300; an arc notch 140 forms a channel 400 for refrigerant flow between the motor and the housing 300, which serves to reduce the motor temperature.

[0043] The motor provided in this embodiment adopts the stator structure in Embodiment 1. Compared with the prior art, under the premise of a similar flow area, the contact area between the outer periphery of the stator core 100 and the housing 300 is larger, which can improve the stability and reliability of the whole machine assembly. Moreover, by adjusting the radius of the arc notch 140, the magnetic field distribution of the stator core 100 can be changed, the stator magnetic flux density of the stator core 100 can be reduced, thereby reducing the loss of the stator core 100, achieving the purpose of reducing the motor input power and increasing the motor maximum torque.

[0044] Example 3: In another aspect of this application, a compressor is provided, in reference to Figure 2 and Figure 7 Based on, refer to Figure 8 .

[0045] A compressor 700 includes a housing, a pump assembly 600, and a motor 500 as described in Embodiment 2 above. Both the pump assembly 600 and the motor are disposed inside the housing. The pump assembly 600 drives the refrigerant to flow, so that the refrigerant circulates in the channel 400, thereby achieving the effect of cooling the motor 500 inside the compressor 700.

[0046] The compressor provided in this embodiment uses the aforementioned motor, which makes the refrigerant flow more smoothly during the operation of the compressor, and can further reduce the motor temperature inside the compressor, thereby improving the motor efficiency and the compressor efficiency.

[0047] 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 stator structure, characterized by, include: The stator core (100) includes a stator yoke (110), which has an inner circumference and an outer circumference. A plurality of wire inlet slots (120) are distributed circumferentially along the inner circumference, and a stator tooth (130) is defined between two adjacent wire inlet slots (120). Multiple arc notches (140) are distributed circumferentially along the outer periphery, and each arc notch (140) corresponds to the position of each stator tooth (130). The centerline of the stator tooth (130) passes through the center of the inner circumference and the center of the arc notch (140), and the center of the arc notch (140) is located on the outer circumference.

2. The stator structure according to claim 1, characterized in that, The diameter of the inner circumference is D1, the radius of the arc notch (140) is R3, and the ratio of D1 to R3 is greater than or equal to 16.3 and less than or equal to 26.

3. The stator structure according to claim 1, characterized in that, The diameter of the outer periphery is D2, the radius of the arc notch (140) is R3, and the ratio of D2 to R3 is greater than or equal to 36.3 and less than or equal to 51.

4. The stator structure of claim 1, wherein The radius of the arc notch (140) is R3, the width of the stator tooth (130) is W3, and the ratio of R3 to W3 is greater than or equal to 0.55 and less than or equal to 0.

85.

5. The stator structure of any one of claims 1-4, wherein, The stator core (100) is formed by stacking multiple stator laminations.

6. An electric motor, characterized in that, The motor (500) includes a rotor structure (200) and a stator structure according to any one of claims 1-5, wherein the rotor structure (200) is mounted in the inner circumference in the axial direction.

7. The electric machine of claim 6, wherein, It also includes winding components; The winding assembly is disposed within the plurality of the inlet slots (120).

8. The electric machine of claim 7, wherein, The two poles of the winding assembly are symmetrically distributed with a preset X-axis or Y-axis as the axis of symmetry.

9. The electric machine of claim 7, wherein, It also includes a housing (300), the stator structure being disposed within the housing (300); The arc notch (140) and the housing (300) form a channel (400) for refrigerant flow.

10. A compressor characterized by, The compressor (700) includes a housing, a pump assembly (600), and a motor (500) as described in claim 9. Both the pump assembly (600) and the motor (500) are disposed within the housing. The pump assembly (600) drives the refrigerant to flow so that the refrigerant circulates within the channel (400).

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