Lenze 8400 - Manual (Page 241)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
241
5 Motor control (MCTRL)
5.9 Servo control (SC)
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Additional limitation of the I component of the speed controller when the voltage limit is reached
(anti-wind-up)
In dynamic acceleration processes in the field weakening range, the acceleration torque is limited
due to the limitation of the maximum output voltage of the inverter. Acceleration ramps that are
set too high ( C00012 ) may lead to undesired charging of the integrator of the speed controller,
which result in very strong overshoots of the actual speed value when the setpoint is reached.
The so-called anti-wind-up function serves to intelligently limit the integrator part in dynamic
acceleration processes in the field weakening range so that an overshoot of the actual speed value
can be prevented when the setpoint speed is reached.
This function is deactivated in the Lenze setting because the robustness of the drive may decrease
in the field weakening range. Possible consequences are slight speed variations. If required by the
application, the function can be activated via C00079/3 .
[5-25] Typical signal characteristics for switched-on/off anti-wind-up function

Tip!
Lenze recommend to activate the additional limitation of the speed controller's I
component on reaching the voltage limit ( C00079 = 1) if dynamic acceleration processes in
the field weakening range are wanted.
The function should be deactivated again if slight speed variations occur in the field
weakening range.
Parameter Info Lenze setting
C00079/3 SC: n-Ctrl Anti-Wind-Up 0: Off
Anti-wind-up" off (without limitation): Anti-wind-up" on (with limitation):
 Speed setpoint
 Actual speed value
t
n [rpm] Œ

t
n [rpm] Œ
