Siemens SINAMICS S150 - Page 267

Setpoint channel and closed-loop control
7.3 V/f control
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
267
Table 7-1 p1300 V/f characteristics
Parameter
value
Meaning Application / property
0 Linear characteristic Standard with variable voltage boost
V
n
0
f
n
V
f
S 
1 Linear characteristic
with flux current
control (FCC)
Characteristic that compensates for voltage
losses in the stator resistance for static /
dynamic loads (flux current control FCC).
This is particularly useful for small motors,
since they have a relatively high stator
resistance.
9

9
U
S
S

I
PD[
/RDGFXUUHQW
GHSHQGHQW
2 Parabolic
characteristic
Characteristic that takes into account the
motor torque curve (e.g. fan/pump).
• Quadratic characteristic (f² characteristic)
• Energy saving because the low voltage
also results in small currents and losses.
V
n
0
f
n
V
f
S 
3 Programmable
characteristic
Characteristic that takes into account the
motor/machine torque characteristic.
V
V
p1325
f1
p1320
max
r0071
p1327
p1323
p1321
0
f2
p1322
f3
p1324
f
4
p1326
f
r1315
f
max
p1082
5 Precise frequency
drives
Characteristic (see parameter value 0) that takes into account the technological
particularity of an application (e.g. textile applications):
• Whereby current limitation (Imax controller) only affects the output voltage and not
the output frequency.
• By disabling slip compensation.