Stator structure for motor

Abstract

The utility model provides a stator structure for a motor, which belongs to the technical field of motors and comprises a stator iron core, the stator iron core is formed by laminating four sections of stator punching sheets, each section rotates by 90 degrees in the same direction compared with the previous section, a plurality of welding positioning grooves are arranged outside the stator iron core, the laminating coefficient is larger than or equal to 0.97, the stator punching sheets are welded after being compressed, and 12 parts are welded. The beneficial effects of the utility model are that eddy current is induced current generated in the stator core due to the change of a magnetic field in the operation process of the motor, and the size of the eddy current can be reduced by reducing the length of each section of the stator core, thereby reducing the energy loss and the temperature rise of the stator core, and improving the reliability of the motor. The four-section laminated stator core structure can increase the mechanical strength of the stator core. And the sections of stator cores are connected in an overlying manner, so that the extra support and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a stator structure for a motor. Background Art

[0002] The stator core is an important part of the motor's magnetic circuit. Together with the rotor core and the air gap between the stator and the rotor, it forms a complete magnetic circuit for the motor. In an asynchronous motor, the magnetic flux in the stator core is alternating, resulting in core loss. It has good magnetic conductivity and low loss. After searching, the application number "CN202220858296.0" discloses "a stator core structure for a motor", which records that "a first ventilation hole is opened inside the core, and multiple groups of winding protrusions are fixedly connected to the inner wall of the core. Second ventilation holes are fixedly opened at one end of the multiple groups of winding protrusions, and stator teeth are fixedly connected at one end of the multiple groups of winding protrusions. The iron core is used in the motor for a long time. When the core is used, a large amount of heat is generated due to the long-term rotation of the motor. The generated heat is discharged through the first ventilation hole inside, and the first ventilation hole and the second ventilation hole are connected. Therefore, when the motor works for a long time, the heat generated by the iron core is discharged to the outside, thereby cooling the iron core as a whole. At the same time, the second ventilation holes are evenly distributed at the winding protrusions to ensure the uniformity of heat dissipation at various parts of the winding protrusions. When using the iron core, the setting of the stator teeth can reduce the contact area between the coil and the winding protrusion, so that the connection between the coil and the winding protrusion can quickly dissipate heat and improve the overall heat dissipation of the iron core. However, the following problems still exist in actual use:

[0003] In actual use, the stability and heat dissipation functions are still poor.

[0004] Based on this, it is extremely practical to provide a structure with good heat dissipation function and stability. Utility Model Content

[0005] The utility model aims to provide a stator structure for a motor, aiming to solve the above technical problems.

[0006] An embodiment of the utility model provides a stator structure for a motor, comprising a stator core.

[0007] The stator core is composed of four sections of stator punching sheets stacked together, each section is rotated ninety degrees in the same direction compared to the previous section, a plurality of welding positioning grooves are provided on the outside of the stator core, the stacking coefficient is ≥0.97, the stator punching sheets are welded after being pressed, and there are 12 welds in total, and the outer wall of the stator core is coated with an anti-rust coating.

[0008] In one implementation of the utility model, the material of the stator punching sheet is 35SW1900 silicon steel sheet.

[0009] In one implementation of the utility model, 48 winding slots are provided inside the stator core, and stator windings are provided inside the 48 winding slots.

[0010] In one implementation of the utility model, the burr height of the stator punching sheet is less than 0.03 mm.

[0011] In one implementation of the utility model, the net area of ​​the stator punching sheet is 328.63 m2.

[0012] In one embodiment of the utility model, the surface of the stator punching sheet is very smooth after processing, without waves or other shapes.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1) By providing a stator core, the stator core is divided into four sections for lamination, thereby increasing the contact area between the stator core and the cooling medium (such as air or coolant), thereby improving the heat dissipation efficiency;

[0015] 2) Eddy current is the induced current generated in the stator core due to the change of magnetic field during the operation of the motor. By reducing the length of each section of the stator core, the size of the eddy current can be reduced, thereby reducing energy loss and temperature rise of the stator core. The four-section stacked stator core structure can increase the mechanical strength of the stator core. Each section of the stator core is stacked and connected to provide additional support and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the exploded structure of the utility model.

[0019] In the figure: 100, stator core; 200, stator punching sheet; 300, stator winding. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] See also Figure 1-2 , a stator structure for a motor includes a stator core 100.

[0023] See also Figure 1 The stator core 100 is stacked by four sections of stator punching sheets 200, each section is rotated ninety degrees in the same direction compared with the previous section, and a plurality of welding positioning grooves are opened on the outside of the stator core 100. The stacking coefficient is ≥0.97. The stator punching sheets 200 are welded after being pressed, and there are 12 welding points in total. The outer wall of the stator core 100 is coated with an anti-rust coating.

[0024] In a specific embodiment, by providing a stator core 100, by dividing the stator core 100 into four sections for stacking, the contact area between the stator core 100 and the cooling medium (such as air or coolant) is increased, thereby improving the heat dissipation efficiency. This helps to reduce the heat generated by the motor during operation, maintain the stability and reliability of the motor, and the four-section stacking design can reduce eddy current losses. Eddy current is the induced current generated in the stator core 100 due to the change of the magnetic field during the operation of the motor. By reducing the length of each section of the stator core 100, the size of the eddy current can be reduced, thereby reducing energy loss and the temperature rise of the stator core 100. The four-section stacked stator core 100 structure can increase the mechanical strength of the stator core 100. The stacking connection between each section of the stator core 100 can provide additional support and stability, so that the stator core 100 can better withstand the mechanical stress and vibration during the operation of the motor.

[0025] See also Figure 2 The material of the stator punching sheet 200 is 35SW1900 silicon steel sheet.

[0026] In a specific embodiment, the 35SW1900 silicon steel sheet is provided, so that it has a high resistivity during use, which helps to reduce the eddy current loss during the operation of the motor. Eddy current loss is the energy loss caused by the induced current generated in the stator core 100 of the motor. The high resistivity can effectively suppress the generation of eddy current, thereby improving the efficiency of the motor. The silicon steel sheet, as a special electrical steel material, has good electromagnetic properties. It has high magnetic permeability and low hysteresis loss, so that the motor can convert electrical energy and mechanical energy more efficiently during operation, thereby improving the overall performance of the motor.

[0027] See also Figure 1 48 winding slots are provided inside the stator core 100 , and stator windings 300 are provided inside the 48 winding slots.

[0028] In a specific embodiment, the winding slots are provided so that the stator winding 300 can be more closely attached to the stator core 100, thereby improving the electromagnetic conversion efficiency. This design can maximize the use of the magnetic flux of the stator core 100, so that the motor can generate greater torque and power during operation, and the opening of the winding slots can increase the contact area between the stator winding 300 and the cooling medium (such as air or coolant), thereby improving the heat dissipation efficiency. This helps to reduce the temperature of the motor during operation and extend the service life of the motor.

[0029] See also Figure 2 , the burr height of stator punching sheet 200 is less than 0.03mm.

[0030] In a specific embodiment, the stator punching sheet 200 is provided, and the burr is a tiny metal protrusion generated during the punching process. If the burr height is too high, the insulation performance between the stator punching sheets 200 may be reduced. When the burr height is less than 0.03 mm, it can ensure that the insulation performance between the stator punching sheets 200 is effectively maintained, reducing the risk of short circuit and failure caused by the burr.

[0031] See also Figure 2 The net area of ​​the stator punching sheet 200 is 328.63 m2.

[0032] In a specific embodiment, a larger net area means that the stator sheet 200 can provide more space to accommodate the electromagnetic coil, thereby increasing the efficiency of electromagnetic energy conversion, which helps to improve the torque and power output of the motor, allowing it to work more efficiently.

[0033] See also Figure 2 After the stator punching sheet 200 is processed, its surface is very smooth without any wave or other shapes.

[0034] In a specific embodiment, when in use, the flat surface means that the contact between the stator punching sheet 200 and the electromagnetic coil is closer, reducing the air gap and poor contact, which helps to reduce the loss of electromagnetic energy and improve the electromagnetic efficiency of the motor.

[0035] When in use, the user first uses the provided stator core 100, and by dividing the stator core 100 into four sections for stacking, the contact area between the stator core 100 and the cooling medium (such as air or coolant) is increased, thereby improving the heat dissipation efficiency. This helps to reduce the heat generated by the motor during operation, and then maintain the stability and reliability of the motor, and the design of the four-section stacking can reduce eddy current losses. Eddy current is the induced current generated in the stator core 100 due to the change of the magnetic field during the operation of the motor. By reducing the length of each section of the stator core 100, the size of the eddy current can be reduced, and then the energy loss and the temperature rise of the stator core 100 can be reduced. The four-section stacked stator core 100 structure can increase the mechanical strength of the stator core 100. The stacking connection between each section of the stator core 100 can provide additional support and stability, so that the stator core 100 can better withstand the mechanical stress and vibration when the motor is running. Finally, through the provided 35SW1900 silicon steel sheet, it is convenient to have a higher resistivity when in use, which helps to reduce the eddy current loss when the motor is running. Eddy current loss is the energy loss caused by the induced current generated in the stator core 100 of the motor. High resistivity can effectively suppress the generation of eddy current, thereby improving the efficiency of the motor. Silicon steel sheet, as a special electrical steel material, has good electromagnetic properties. It has high magnetic permeability and low hysteresis loss, which enables the motor to convert electrical energy and mechanical energy more efficiently during operation, thereby improving the overall performance of the motor.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A stator structure for a motor, characterized in that: include: A stator core (100) is provided, wherein the stator core (100) is stacked by four sections of stator punching sheets (200), the stacking coefficient is ≥0.97, each section is rotated 90 degrees in the same direction compared with the previous section, a plurality of welding positioning grooves are provided on the outside of the stator core (100), the stator punching sheets (200) are welded after being pressed, and a total of 12 welding locations are performed, the outer wall of the stator core (100) is coated with a rust-proof coating, 48 winding slots are provided on the inside of the stator core (100), and stator windings (300) are provided inside the 48 winding slots.

2. The stator structure for a motor according to claim 1, characterized in that: The material of the stator punching sheet (200) is silicon steel sheet.

3. The stator structure for a motor according to claim 2, characterized in that: The burr height of the stator punching sheet (200) is less than 0.03 mm.

4. The stator structure for a motor according to claim 1, characterized in that: The net area of ​​the stator punching sheet (200) is 328.63 m2.

5. The stator structure for a motor according to claim 1, characterized in that: The surface of the stator punching sheet (200) is flat and free of waves or other shapes.

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