Siemens SINAMICS G150 Operating Instructions Manual page 429

Several variations of the V/f characteristic exist, which are listed in the following table.
Table 7- 1 p1300 V/f characteristics
Parameter Meaning
value
0 Linear characteristic
1 Linear characteristic
with flux current
control (FCC)
2 Parabolic character-
istic
3 Programmable char-
acteristic
4 Linear characteristic
and ECO
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
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 re-
sistance.
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%).
Setpoint channel and closed-loop control
Application / property
7.3 V/f control
429