Application Manual CDA3000
6-33
6  Control modes
1
2
3
4
5
6
A
DE
EN
FR
6.2.1 _78SS Speed 
controller SFC
Figure 6.16 Sensorless Flux Control SFC
Parameters of speed controller SFC
Function Effect
• Setting of speed control loop • Smooth running and good
dynamics of the drive
i
sa
i
sb
i
sc
e
FS
Final control element
Ud, Uq
Current controller
f
reference
f
actual
i
d
, i
p reference
i
d
, i
q actual
-
Actual value calculation 
of d-current and q-current
Speed controller
Motor model of 
asynchronous 
machine
M
3~
Parameter Function Value range FS  Unit Online
780-SSGF1 CDS1: Scaling of speed controller gain 0.00...999.95 100 %
781-SSG1 CDS1: Speed controller gain 0...16383 1
782-SSTL1 CDS1: Speed controller lag time 0.001...2 0.02 s
783-SSTF1
CDS1: Filter time constant of speed 
estimate
0.0005...20 0.02 s
784-SSGF2 CDS2 Scaling of speed controller gain 0.00...999.95 100 %
785-SSG2 CDS2: Speed controller gain 0...16383 1
786-SSTL2 CDS2: Speed controller lag time 0.001...2 0.02 s
787-SSTF2
CDS2: Filter time constant of speed 
estimate
0.0005...20 0.02 s
Table 6.12 Parameters of speed controller SFC