Questions regarding frequency adjustment of fan motors
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Urea large particles are granulated using a fluidized bed; the blower of the granulator has been changed from operating at fixed frequency to operating at variable frequency. It was found that the amount of dust inside the granulator had increased, and it couldn’t be removed by the exhaust fan. Anyone who understands this situation can help analyze it: handshake
This indicates that the selected frequency converter is not compatible with the motor of your fan; either the appropriate model was not chosen, or the frequency converter purchased is of poor quality and cannot meet the operational requirements. It can be tested in this way: adjust the frequency of the inverter to its maximum value, observe the current flowing through the motor, and compare it with the current level when there is no inverter present; the performance can thus be assessed based on the current values.
You didn’t mention the operating conditions; when the power frequency changes, does the operating frequency decrease? If the frequency drops, the flow rate and pressure will also decrease, which could lead to the phenomenon you mentioned. I’m not familiar with granulators specifically
The air volume and negative pressure have decreased, failing to meet the production requirements. Check the frequency and current.
Although variable frequency drives help save costs, it is necessary to analyze each situation on its own