In the production, sometimes we will use the inverter to drag the three-phase asynchronous motor, then we may encounter the noise becomes louder, the following Senli motor Xiaobian on the reason for this kind of situation analysis and treatment, we together a simple understanding of it.

       There are no more than two reasons for the loud motor noise: mechanical and electrical. Mechanical aspects such as scraping motor housing motor or cooling fan damage, motor fixing instability. This situation is better to deal with, as long as the noise source can be found, it is generally better to deal with.

       If it's due to electrical reasonsThree-phase asynchronous motorThe formation of noise, we can do this:

       1.Motor resonance Sometimes, a motor will produce mechanical resonance in a certain frequency band during operation. At this time, the frequency hopping setting method of the frequency converter can be used. The general frequency converter has a "frequency hopping" setting, its role is: set the frequency of the motor resonance, when the frequency converter runs to this frequency band, skip this frequency segment to avoid the motor resonance.

       2.The load capacity of the three-phase asynchronous motor is reduced sometimes after a long time of use, or the quality of the motor is not good, the load capacity will be reduced. The motor noise here will also be louder than normal.

       3.The frequency converter carrier frequency setting is too low can properly set the carrier frequency higher, but this will bring some problems, if the carrier frequency is adjusted too high, it will cause interference to other equipment, especially when usedPLCMethod of communication. Therefore, the carrier frequency should be set according to the actual situation of the site.

       4.When the high-order harmonic component of the frequency converter is large, it is easy to cause the motor vibration to increase, the speed to jitter, instability, and increase the motor noise. Install hereAC(Input side)andDC(Delivery side)The reactor.

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