The default Cut-off voltage 603 (UC) and Cut-off frequency 604 (FC) are derived
from the motor data Rated voltage 370 and Rated frequency 375. With the parame-
terized
Starting voltage 600 (US), the linear equation of the V/f-characteristic re-
sults.
V 5.0f
Hz 0.00Hz 50.00
V 5.0-V 400.0
USf
0FC
USUC
U +⋅
−
=+⋅
−
−
=
The Rise frequency 602 (FK) is entered as a percentage of the Cut-
604 (FC), the default value is f=10 Hz. The output voltage for the default
rise 601 (UK) is calculated as U=92.4V.
( ) ( ) ( )
V 92.41.1V 5Hz 500.2
Hz 0Hz 50
V 5-V 400
UK1USFCFK
0FC
USUC
U =⋅
+⋅⋅
−
=+⋅
+⋅⋅
−
−
=
16.1 Dynamic Voltage Pre-Control
The Dyn. voltage pre-control 605 accelerates the control behavior of the current
limit controller (parameter Operation mode 610) and the voltage controller (parame-
ter
Operation mode 670). The output voltage value resulting from the V/f character-
istic is changed by addition of the calculated voltage pre-control.
06/13 Operating Instructions ACU 209
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