Lenze EVF9333−xV - Manual (Page 233)

Commissioning
Optimising the operating behaviour
Oscillation damping
6
6.11
6.11.2
l
6.11−3 EDSVF9333V EN 6.2−04/2012
6.11.2 Oscillation damping
Suppressing no−load oscillations in case of:
ƒ Drives with different rated power of controller and motor, e. g. when
operating with high switching frequency and the power derating
involved.
ƒ Operation of higher−pole motors.
ƒ Operation of three−phase AC drives > 10 kW.
Compensation of resonances in the drive kit:
ƒ Certain asynchronous motors may show this behaviour above 1 /
3
of
the rated speed ( 1 /
3
× n
n
). This may result in an unstable operation
(current and speed variations).
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0234 damp value 20 −100 {1 %} 100 Influence of the oscillation
damping, function block MCTRL
l Minimising a tendency to
oscillation of the drive
l Influences the tendency to
oscillation of the drive
l When C0025 >1 and C0006 = 1,
C0234 is set to 0
^
8.2−25
^
8.2−48
C0235 damping 5 1 {1 ms} 600 Filter time of the oscillation
damping, function block MCTRL
l Filter time for the internal
signal for oscillation damping
^
8.2−25
^
8.2−48
C0236 damp limit 0.2 0.0 {0.1 Hz} 20.0 Limit value of oscillation damping,
function block MCTRL
l Limit value for the internal
signal of oscillation damping
Description