Siemens SINAMICS G150 Operating Instructions Manual page 378

Setpoint channel and closed-loop control
7.3 V/f control
Table 7- 1 p1300 V/f characteristics
Parameter Meaning
value
0 Linear characteristic
1 Linear characteristic
with flux current
control (FCC)
2 Parabolic
characteristic
3 Programmable
characteristic
4 Linear characteristic
and ECO
376
Standard with variable voltage boost
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.
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.
Characteristic that takes into account the
motor/machine torque characteristic.
Characteristic (see parameter value 0) and Eco mode at constant operating point.
At constant operating point, the efficiency is optimized by varying the voltage.
•
Active slip compensation is necessary here; the scaling must be set so that the
•
slip is fully compensated (p1335 = 100%).
Application / property
V
V
n
0
V
V
n
0
V
V
max
r0071
p1327
p1325
p1323
p1321
r1315
0
f1
p1320
Operating Instructions, 03/2012, A5E03263466A
f
f
n
f
f
n
f
f 4 f max
f2 f3
p1082
p1322 p1324 p1326
Converter cabinet units