Efficient Networks Siemens Sinamics S120 - Manual (Page 170)

Vector V/f control (r0108.2 = 0)
5.1 Introduction
Drive Functions
170
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Table 5-1 V/f characteristic (p1300)
Parameter
values
Meaning Application / property
0 Linear characteristic Standard (w/o voltage boost)

S 
I
9
I
Q
9
Q
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.
/RDG
FXUUHQW
GHSHQGHQW
I
S
S
U
9
PD[
9

2 Parabolic characteristic Characteristic that takes into account
the motor torque curve (e.g. fan/pump).
a) Quadratic characteristic (f
2
characteristic)
b) Energy saving because the low
voltage also results in small currents
and drops.
S 
I
9
I
Q

9
Q
3 Programmable
characteristic
Characteristic that takes into account
motor/machine torque curve (e.g.
synchronous motor).
S
IPD[
U
I
S
 I
S
I
S
I

S
S
S
U
9
PD[
S
I
S
9