Resonance Frequency Elimination; Rush Control - ABB +N5600 Firmware Instructions

Tuning procedure for oscillation damping
• Select the input by
• Activate algorithm by
• Set 26.57 Oscillation damping gain
• Calculate the oscillation frequency from the signal (use the Drive
composer PC tool) and set
• Set 26.56 Oscillation damping
• Increase
algorithm starts to take effect.
oscillation amplitude decreases
• Increase 26.57 Oscillation damping gain
and adjust 26.56 Oscillation damping
phase if necessary
• Increase 26.57 Oscillation damping gain
suppress the oscillation totally.
Note: Changing the speed error low-pass filter time constant or the integration time of
the speed controller can affect the tuning of the oscillation damping algorithm. It is
recommended to tune the speed controller before the oscillation damping algorithm.
(The speed controller gain can be adjusted after the tuning of this algorithm.)
Settings
Parameters 26.51...26.58


Resonance frequency elimination

The control program contains a notch filter function for removing the resonance
frequencies from the speed error signal.
Settings
Parameters 24.13...24.17


Rush control

In torque control, the motor could potentially rush if the load were suddenly lost. The
control program has a rush control function that decreases the torque reference
whenever the motor speed exceeds
26.53 Oscillation compensation input
26.51 Oscillation damping
26.55 Oscillation damping frequency
26.57 Oscillation damping gain
to
(page 283).
(page 264).
30.11 Minimum speed
to 0
phase*
gradually so that the
oscillation amplitude increases
• Try other values for
damping phase
*If the phasing of a DC oscillation cannot be
determined by measuring, the value of 0
degrees is usually a suitable initial value.
or
Program features 85
26.56 Oscillation
30.12 Maximum speed.