Lenze EVF9325 User Manual

Commissioning
Optimising the operating behaviour
Oscillation damping
6
6.11
6.11.2

6.11-3
EDSVF9333V EN 3.0-06/2005
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
z Minimising a tendency to
oscillation of the drive
z Influences the tendency to
oscillation of the drive
z 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
z 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
z Limit value for the internal
signal of oscillation damping
Description

Lenze EVF9325 Specifications

General

Brand	Lenze
Model	EVF9325
Category	DC Drives
Language	English