ACS800

AC-drive application program

Inertia compensation
The inertia compensation is used to compensate for the inertia of the roll during acceleration and deceleration.

Friction compensation
The friction compensation is compensating for the friction coming from the bearing, seals etc.

Speed reference evaluation
This function calculates the speed deviation and evaluates it against and adjustable deadband. There are two limits in the torque limitation function: Either when the speed deviation is within or outside the deadband. In this way the system can compensate inaccuracy of the speed reference e.g. difficulties in knowing the forward slip in the mill.

These special adaptions makes it possible for ABB to deliver a drive system with perfect synchronism between the roll and the strip.