What are the suggestion to reduce motor noise when motor is controlled by ATV212 drive.

The less capacitor technology of ATV212 and the input voltage of ATV212 which is lower than the rated motor voltage. These possibilities are linked.
In this case; you can use a product with more capacitor on DC bus or ATV212 with higher rating.
Another possibility is that as the switching frequency of ATV212 is reducing when its temperature increases. Then, we recommend you perform some test by fixing the switching frequency:
# Set the switching frequency to its maximum (F300=16kHz), see if the audible noise is acceptable by customer.
# Set the Switching Frequency Random Mode to disable (F312=0, it is factory setting), see if the audible noise is acceptable by customer.
# If the audible noise is still not acceptable by customer, we recommend you to Set the Switching Frequency Control Mode to 0 or 2. This setting will fix the switching frequency even if the temperature of ATV212 increases. The good setting is when the audible noise is acceptable by customer and when ATV212 does not trip in overheating fault.
# Speed loop is not well optimized. In this case; Try to decrease the frequency loop gain F418 and try to optimize it.
#you can also check it by reducing F496.
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Released for:Schneider Electric India