[Method for identifying the source of motor noise]
l Measuring point location method. Determine the noise source according to the sound level and corresponding position of each measuring point.
l Variable parameter method. Determine the noise source by changing certain parameters of the motor, such as voltage, frequency, no-load/load, fan ventilation system coefficient, etc.
l Separate component method. Targeted separation of some components of the motor, such as removing the fan, replacing the rolling bearing with a sliding bearing, replacing the rotor, etc., to identify the noise source.
l Sound intensity method. Identify noise sources using the directional principle of sound intensity testing.
l Spectrum analysis method. Analyze the 1/3 octave or narrowband spectrum of motor noise to identify noise sources.
【Spectrum Tester】
In fact, the application of spectrum tester in noise test is still very extensive. Its main feature is that it can refine the sound source we hear to different frequency bands. Then according to the reference, the noise source of the noise can be obtained more accurately. At the same time, with the effective analysis model, instructive opinions can be put forward for the direction of motor optimization.
The picture is a typical 1/3 octave frequency spectrum of a motor. We can identify the noise source according to the table summed up by Lao Zhang based on the frequencies corresponding to the independent straight squares in the picture.
Space is limited, there is no best motor, only the most suitable motor for you. Motor technology changes the way of life,
