Lenze 8400 motec - Manual (Page 100)

5 Motor control (MCTRL)
5.5 V/f characteristic control (VFCplus)
100 Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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5.5.3 Optimising the control mode
The V/f characteristic control (VFCplus) is generally ready for operation. It can be adapted
subsequently by adapting the characteristic and/or the drive behaviour.
Adapting characteristic
For the linear and quadratic characteristic, it is also possible to match its curve to different load
profiles or motors by adapting the V/f base frequency ( C00015 ) and the V
min
boost ( C00016 ).
 Adapting the V/f base frequency ( 101)
 Adapting the Vmin boost ( 102)
Adapting drive behaviour
• Limitation of the maximum current by a current limitation controller (e.g. to prevent the motor
from stalling or to limit to the maximally permissible motor current).  Optimising the Imax
controller ( 103)
• Adaptation of the field frequency by a load-dependent slip compensation (improved speed
accuracy for systems without feedback)