Lust CDA3000 - Page 274

6-22
Application Manual CDA3000
6 Control modes
Figure 6.10 Block diagram of control circuit (VFC)
Driving profile
generator
f
t
M
3~
i
sa
i
sb
i
sc
Active and
apparent
current
calculation
Iw
Is
I x R load
compensation
U
f
Current
injection
Magnetization
Current-
controlled
startup
Slip
compensation
Reference
U
ZK
f
U
Start
D
U
U
f
Iw
f
Is
D f
f
Is
VF characteristic
refvalue
is_ramp
deltaScope
Measuring point of digital scope in DRIVEMANAGER
deltau
IseffIweff
iscisa
isb
actvalue