When the motor is running, there are three aspects of n […]
When the motor is running, there are three aspects of noise, one is electromagnetic noise, the other is mechanical noise, and the third is ventilation noise.
1.Electromagnetic noise. Mainly caused by the air gap harmonic magnetic field, the radial alternating magnetic tensile force generated by the harmonic flux interaction of the stator rotor teeth will cause periodic dynamic radial deformation of the stator core yoke, which will stimulate the stator to generate electromagnetic noise. In addition, broken bars of squirrel-cage rotors, short-circuit between winding rotor turns, rotor eccentricity, asymmetry of stator windings or short-circuit between turns, etc., can cause electromagnetic noise.
2.Mechanical noise. It is mainly bearing noise and structural component resonance noise, followed by rotational vibration noise.
3.Ventilation noise. The main reason is the noise generated by the protruding parts such as fan blades and rotor blades impacting the air periodically when the motor rotates.
The main reason for the noise of Liming motor running, there is noise or scream: