10
Service
210
Festo – GDCP-CMMS/D-FW-EN – 1404NH – English
10.1.6
I
2
t monitoring
The motor controller has I
2
t monitoring to limit the average power loss in the output stage and in the
motor. As the power dissipation occurring in the power electronics and motor grows with the square of
the flowing current, the squared current value is assumed as the dimension of the power loss.
Note
I
2
t monitoring is designed for a uniform temperature increase of all motor phases. At
low speed (frequency) the individual phases of the motor are energised differently. This
can result in the permissible temperature being exceeded in the energised phases.
–
Avoid low speeds if the drive is to be operated at the load limit.
Summary of Contents for CMMD-AS series
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