The
I2t protection keeps track of the motor temperature by monitoring the motor
current and computing the over-temperature. Any current above the nominal value
will produce a bigger or a smaller, but nevertheless an overheat to the motor,
and on the same basis, a current below the nominal value will allow the motor
to decrease its temperature for exmaple : down to the ambient temperature in
the best case = current zero = motor stopped. While the motor has a current
bigger than the nominal current the drive will consider that the motor
temperature is increasing and when a certain threshold is reached the
protection is triggered.
