Motor stator single-tooth structure
By designing the single tooth arc surface of the motor stator, the problem of the gap shape not being considered by the existing motor is solved, and the protection of electrical performance and the reduction of vibration noise are achieved.
Patent Information
- Application Number
- CN202420226459.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-30
AI Technical Summary
The existing motors did not consider the gap shape between the stator single tooth surface and the rotor surface during design, which affected the electrical performance and vibration noise of the motor.
Design a single tooth arc surface of the motor stator, with the curvature of the arc surface greater than the curvature of the rotor surface. Through uneven air gap design, the transmission and radiation of radial force waves are reduced.
It effectively prevents the reduction of the motor's electrical performance, reduces vibration noise, and improves the use efficiency of the motor.
Smart Images
Figure CN222484393U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors, and specifically refers to a single-tooth structure of a motor stator. Background Art
[0002] The noise generated by the motor can be divided into electromagnetic noise, mechanical noise and aerodynamic noise according to its main vibration source. Electromagnetic noise comes from electromagnetic vibration, which is excited by the exciting force wave generated by the motor air gap magnetic field acting on the motor core; at the same time, the vibration noise characteristics of the permanent magnet synchronous motor are also closely related to the modal characteristics of the motor structure and the physical characteristics of the fluid domain that transmits the noise.
[0003] However, the existing motors have the following problems when designing the motor structure: the shape of the gap between the surface of a single tooth of the motor stator and the surface of the rotor is not considered. On the one hand, the shape of the gap affects the air gap flux density, thereby affecting the electrical performance of the motor; on the other hand, it also affects the transmission and radiation of the electromagnetic force wave received by the single tooth of the motor stator, thereby affecting the vibration noise of the motor. Utility Model Content
[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a single-tooth structure of a motor stator. By designing the end face structure of the single-tooth of the motor stator, on the one hand, it can prevent the reduction of the electrical performance of the motor caused by the change of the end face structure, and on the other hand, it can also reduce the vibration noise of the motor.
[0005] The technical solution adopted by the utility model is as follows: the utility model provides a motor stator single tooth structure, including a stator, on which a stator single tooth is integrally connected, one end of the stator single tooth is provided with an arc surface, and the opposite side of the arc surface is provided with a rotor surface.
[0006] Furthermore, the curvature of the arcuate surface is greater than the curvature of the rotor surface.
[0007] Furthermore, a distance between the farthest end of the arc surface and the nearest end of the rotor surface is W, and the distance W ranges from 0.1 mm to 0.4 mm.
[0008] Furthermore, the central angle of the arcuate surface is α, and the range of the central angle α is 15°-20°.
[0009] Furthermore, a first chamfer is provided at a connection point between the arc surface and the stator single tooth, and a second chamfer is provided at a connection point between the stator single tooth and the stator.
[0010] The beneficial effects achieved by the utility model using the above structure are as follows:
[0011] The present invention provides a motor stator single-tooth structure. By designing the arc surface of the motor stator single tooth, on the one hand, the electrical performance of the motor can be guaranteed and the amplitude of the fundamental wave of the air gap flux density can be prevented from decreasing substantially. On the other hand, reasonable noise reduction of the motor can be ensured. After the stator is arc-shaped, the air gap in the arc-shaped concave part is enlarged and is no longer a uniform air gap. The electromagnetic force is no longer perpendicular to the surface of the stator single tooth, which reduces the transmission and radiation of radial force waves to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A schematic diagram of a single-tooth structure of a motor stator provided by the utility model;
[0013] Figure 2 This is a size structure diagram of a single tooth of a motor stator provided by the utility model.
[0014] Among them, 1. stator, 2. single stator tooth, 3. arc surface, 4. rotor surface, 5. first chamfer, 6. second chamfer.
[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0017] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0018] Embodiment 1:
[0019] Overall structure:
[0020] like Figure 1As shown, the utility model provides a motor stator single tooth structure, including a stator 1, a stator single tooth 2 is integrally connected to the stator 1, an arc surface 3 is provided at one end of the stator single tooth 2, and a rotor surface 4 is provided on the opposite side of the arc surface 3.
[0021] Stator single tooth structure and noise reduction mechanism:
[0022] like Figure 1 and Figure 2 As shown, the utility model provides a single-tooth structure of a motor stator, wherein the curvature of the arc surface 3 is greater than the curvature of the rotor surface 4. The distance between the farthest end of the arc surface 3 and the nearest end of the rotor surface 4 is W, and the distance W ranges from 0.1 mm to 0.4 mm. The central angle of the arc surface 3 is α, and the central angle α ranges from 15° to 20°.
[0023] The specific noise reduction mechanism is shown in the following formula:
[0024] B0(α)=[B rα (α)*W] / W1(α);
[0025] In the above formula, B0(α) is the magnetic flux density amplitude when one end of stator 1 is a curved surface, B rθ (α) is the magnetic flux density amplitude when one end of the stator 1 is a plane, W is the air gap length when one end of the stator 1 is a plane, and W1(α) is the air gap length when one end of the stator is a curved surface.
[0026] By designing an uneven air gap, it can be ensured that the electromagnetic force on the stator 1 is not perpendicular to the surface of the stator single tooth 2, which reduces the transmission and radiation of radial force waves to a certain extent. At the same time, a reasonable design of the arc shape can ensure that the electrical performance of the motor is not reduced and the efficiency of the motor is guaranteed.
[0027] In order to ensure smooth connection of magnetic flux density and prevent sudden changes in magnetic flux density, such as Figure 1 As shown, the utility model provides a motor stator single tooth structure, wherein a first chamfer 5 is provided at a connection between the arc surface 3 and the stator single tooth 2 , and a second chamfer 6 is provided at a connection between the stator single tooth 2 and the stator 1 .
[0028] Embodiment 2:
[0029] The curvature of the arc surface of a single stator tooth is greater than the curvature of the rotor surface:
[0030] like Figure 1 As shown, the utility model provides a motor stator single tooth structure, including a stator 1, a stator single tooth 2 is integrally connected to the stator 1, an arc surface 3 is provided at one end of the stator single tooth 2, and a rotor surface 4 is provided on the opposite side of the arc surface 3.
[0031] like Figure 1As shown, the utility model provides a single-tooth structure of a motor stator, wherein the curvature of the arc surface 3 is greater than the curvature of the rotor surface 4 .
[0032] At this time, the curvature of the arc surface 3 is greater than the curvature of the rotor surface 4, and thus the air gap length can be uneven, thereby ensuring that the air gap magnetic flux density amplitude between the stator 1 and the rotor surface 4 is reduced, thereby reducing the motor noise.
[0033] like Figure 1 and Figure 2 As shown, the utility model provides a motor stator single tooth structure, the distance between the farthest end of the arc surface 3 and the nearest end of the rotor surface 4 is W, and the distance W ranges from 0.1mm to 0.4mm. The center angle of the arc surface 3 is α, and the center angle α ranges from 15° to 20°. A first chamfer is provided at the connection between the arc surface 3 and the stator single tooth 2, and a second chamfer 6 is provided at the connection between the stator single tooth 2 and the stator 1.
[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0036] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A motor stator single tooth structure, characterized in that: It includes a stator, a single stator tooth is integrally connected to the stator, an arcuate surface is provided at one end of the single stator tooth, and a rotor surface is provided on the opposite side of the arcuate surface; the curvature of the arcuate surface is greater than the curvature of the rotor surface, or the curvature of the arcuate surface is equal to the curvature of the rotor surface; the distance between the farthest end of the arcuate surface and the nearest end of the rotor surface is W, and the distance W ranges from 0.1mm to 0.4mm.
2. The motor stator single tooth structure according to claim 1, characterized in that: The central angle of the arc surface is α, and the range of the central angle α is 15°-20°.
3. The motor stator single tooth structure according to claim 2, characterized in that: A first chamfer is provided at a connection point between the arc surface and the stator single tooth, and a second chamfer is provided at a connection point between the stator single tooth and the stator.