Lenze i700 - Manual (Page 147)

Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
147
5 Motor control & motor settings
5.14 Parameterising the V/f characteristic control
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Parameter setting
The gain of the oscillation signal is to be set according to the following equation:
The time constant of the PT1 filter has to be set in such a way that the oscillation can be damped
and higher-frequency components are filtered out of the signal. The time constant is determined
from the reciprocal value of the double frequency of the current oscillation.
The oscillation frequency calculated can be limited before it is added to the field frequency. The
maximum frequency can be derived from the amplitude of the current oscillation, the rated motor
current, and the slip frequency of the connected motor:
0x2B0A | 0x330A - VFC: Oscillation damping - Parameter
Gain of the oscillation signal
Current amplitude
2 Maximum device current ⋅
----------------------------------------------------------------------------- 100 % ⋅ =
Time constant
1
2 Oscillation frequency ⋅
-------------------------------------------------------------- =
Max. frequency
2 Amplitude of the current oscillation ⋅
Rated motor current
---------------------------------------------------------------------------------------------------- Rated slip frequency ⋅ =
Sub. Name Lenze setting Data type
 1 VFC: Oscillation damping - gain 20 % INTEGER_16
 2 VFC: Oscillation damping - filter time 5 ms UNSIGNED_16
 3 VFC: Oscillation damping - limitation 0.2 Hz UNSIGNED_16
 4 VFC: Oscillation damping - ramp-end
frequency
0 % UNSIGNED_8
Subindex 1: VFC: Oscillation damping - gain
Gain of the oscillation signal
• If the setting is "0 %", the oscillation damping is switched off.
Setting range
(min. value | unit | max. value)
Lenze setting
-100 % 100 20 %
 Write access  CINH  OSC  P  RX  TX INTEGER_16
Subindex 2: VFC: Oscillation damping - filter time
Time constant of the PT1 filter
Setting range
(min. value | unit | max. value)
Lenze setting
1 ms 600 5 ms
 Write access  CINH  OSC  P  RX  TX UNSIGNED_16
Subindex 3: VFC: Oscillation damping - limitation
Limitation of the calculated oscillation frequency before it is added to the field frequency.
Setting range
(min. value | unit | max. value) Lenze setting
0.1 Hz 20.0 0.2 Hz
 Write access  CINH  OSC  P  RX  TX Scaling: 1/10 UNSIGNED_16