Lenze E82xVxxxKxxxxx - Manual (Page 272)

Function library
Optimising the operating behaviour
Oscillation damping
10
l
272 EDS82EV903 EN 3.0
10.3.3 Oscillation damping
Description
Suppression of idling oscillations when:
ƒ the rated power of controller and motor of a drive do not match, e.g. at operation
with high switching frequency and the related power derating
ƒ Operation of higher−pole motors
ƒ Operation of special motors
Compensation of resonances in the drive
ƒ Some asynchronous motors can show this behaviour when being operated with an
output frequency of approx. 20 ... 40 Hz. As a result, operation can be instable
(current and speed fluctuations).
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0079 Oscillation
damping
2 0 {1} 140 ^ 272
Adjustment
1. Approach with speed oscillations.
2. Reduce the speed oscillations by changing C0079 step by step. Additional indicators
for smooth running can be:
– uniform motor current
– reduction of mechanical vibrations in the bearing seat
)
Note!
Compensate the resonances in speed−controlled operation via the parameters
of the controller only.