Oscillation Damping Voltage Range - Lenze L-force HighLine C 8400 Series Reference Manual

5.10.7.1

Oscillation damping voltage range

The oscillation damping voltage range is successfully used with
 unloaded motors (no-load oscillations)
 motors whose rated power deviates from the rated power of the controller.
– e.g. during operation at high switching frequency including the power derating
involved.
 operation with higher-pole motors
 operation with special motors
 compensation of resonance in the drive
– At an output frequency of approx. 20 ... 40 Hz, some asynchronous motors can show
resonance which causes current and speed variations and thus destabilise the
running operation.
Parameter
C00234
C00235

Note!
Compensate the resonance during operation with feedback (closed loop,
feedback of n
Parameterising the slip regulator

How to eliminate speed oscillations in no-load operation at speeds with 40 ... 80 %
of the rated speed:
1. Approach the area where the speed oscillations occur.
2. Reduce the speed oscillations by changing
• The filter time oscillation damping (C00235) should not be changed.
3. These can be indicators for smooth running:
• Constant motor current characteristic
• Reduction of the mechanical oscillations in the bearing seat
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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Info
Oscillation damping influence
Oscillation damping filter time
) via the parameters of the slip regulator.
act
L
8400 HighLine C | Reference manual
Motor control (MCTRL)
Parameterisable additional functions
( 182)
C00234 step by step (increment 1 %).
Lenze setting
Value Unit
5.00 %
32 ms
261