Tuning; Controller Overview - Siemens SINAMICS V90 Operating Instructions Manual

Tuning

9.1

Controller overview

The SINAMICS V90 servo drive consists of three control loops:
● Current control
● Speed control
● Position control
The following block diagram shows the relationship between these three control loops:
In theory, frequency width of the inside control loop must be wider than that of the outer
control loop; otherwise, the whole control system can vibrate or have a low response level.
The relationship between the frequency widths of these three control loops is as follows:
Current loop > speed loop > position loop
Since the current loop of SINAMICS V90 servo drive already has a perfect frequency width,
it is only necessary for you to adjust the speed loop gain and the position loop gain.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884
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