Combination of a motor rotor and a stator

Abstract

The utility model discloses a kind of combination mechanism of motor rotor and stator, including rotor and stator, the rotor is evenly arranged around the stator periphery;The side of the rotor towards the stator has outer circular arc surface, the side of the stator towards the rotor has inner circular arc surface, the diameter of the inner circular arc surface is greater than the diameter of the outer circular arc surface, and the center of the inner circular arc surface and the center of the outer circular arc surface are not concentric.The combination mechanism of motor rotor and stator of the utility model can reduce motor vibration, reduce noise, improve the efficiency of motor.

Description

Technical Field

[0001] This utility model relates to a motor, and more particularly to a combination mechanism of a motor rotor and stator. Background Technology

[0002] like Figure 1 and Figure 2 As shown, there is a uniform air gap 203 between the rotor 201 and stator 202 of a conventional motor, so the generated air gap magnetic field is a square wave or trapezoidal wave. However, the square wave or trapezoidal wave magnetic field contains a large number of high-order harmonics after Fourier series decomposition. The harmonic magnetic field will cause the motor to vibrate more, increase the noise, and reduce the efficiency of the motor. Utility Model Content

[0003] The purpose of this invention is to provide a rotor and stator combination mechanism that reduces motor vibration, lowers noise, and improves motor efficiency.

[0004] To achieve the above objectives, the present invention provides a combination mechanism of a motor rotor and a stator, comprising a rotor and a stator, wherein the rotor is uniformly arranged around the outer periphery of the stator; the side of the rotor facing the stator has an outer arc surface, and the side of the stator facing the rotor has an inner arc surface, wherein the diameter of the inner arc surface is larger than the diameter of the outer arc surface, and the center of the inner arc surface is not concentric with the center of the outer arc surface. Compared with the prior art, this utility model makes the rotor have an outer arc surface and the stator have an inner arc surface, and makes the diameter of the inner arc surface larger than the diameter of the outer arc surface, and the center of the inner arc surface is not concentric with the center of the outer arc surface. This makes the air gap between the stator and the rotor very close to a sine wave. Therefore, the air gap magnetic field between the stator and the rotor is also very close to a sine wave, which greatly reduces the harmonic content in the air gap magnetic field, effectively reduces the vibration and noise of the motor caused by the harmonic magnetic field, and improves the efficiency of the motor.

[0005] Preferably, the ratio of the diameter of the inner arc surface to the diameter of the outer arc surface is greater than 1 and less than 6. Attached Figure Description

[0006] Figure 1 This is a structural diagram of the rotor and stator of a conventional motor.

[0007] Figure 2 yes Figure 1 An enlarged view of A.

[0008] Figure 3 This is a structural diagram of the combined mechanism of the motor rotor and stator of this utility model.

[0009] Figure 4 yes Figure 3 A magnified view of B. Detailed Implementation

[0010] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0011] Please see Figure 3 and Figure 4 The present invention relates to a motor rotor and stator assembly mechanism comprising a rotor 1 and a stator 2, wherein the rotor 1 is uniformly arranged around the outer periphery of the stator 2; the rotor 1 has an outer arc surface 11 on the side facing the stator, and the stator 2 has an inner arc surface 21 on the side facing the rotor, wherein the diameter R of the inner arc surface 21 is larger than the diameter r of the outer arc surface 11, and the center O of the inner arc surface 21 is not concentric with the center P of the outer arc surface 11. The air gap 3 between the rotor 1 and the stator 2 has a sinusoidal wave structure; the ratio of the diameter R of the inner arc surface 21 to the diameter r of the outer arc surface 11 is greater than 1 and less than 6.

[0012] Compared with the prior art, this utility model makes the rotor 1 have an outer arc surface 11 and the stator 2 have an inner arc surface 21, and makes the diameter of the inner arc surface 21 larger than the diameter of the outer arc surface 11, and the center of the inner arc surface 21 is not concentric with the center of the outer arc surface 11. This makes the air gap 3 between the stator 2 and the rotor 1 very close to a sine wave. Therefore, the air gap magnetic field between the stator 2 and the rotor 1 is also very close to a sine wave, thereby significantly reducing the harmonic content in the air gap magnetic field, effectively reducing the vibration and noise of the motor caused by the harmonic magnetic field, and improving the efficiency of the motor.

[0013] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A combination mechanism of a motor rotor and stator, characterized in that: The device includes a rotor and a stator, wherein the rotor is uniformly arranged around the outer periphery of the stator; the side of the rotor facing the stator has an outer arc surface, and the side of the stator facing the rotor has an inner arc surface, wherein the diameter of the inner arc surface is larger than the diameter of the outer arc surface, and the center of the inner arc surface is not concentric with the center of the outer arc surface.

2. The combination mechanism of motor rotor and stator according to claim 1, characterized in that: The ratio of the diameter of the inner arc surface to the diameter of the outer arc surface is greater than 1 and less than 6.

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