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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
26.53 Oscillation compensation input
26.51 Oscillation damping
26.55 Oscillation damping frequency
26.57 Oscillation damping gain
to
(page 283).
Standard program features 89
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.
26.56 Oscillation
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