Voltage Boost - Siemens SINAMICS S120 Function Manual

Vector V/f control (r0108.2 = 0)

5.2 Voltage boost

5.2 Voltage boost
With an output frequency of 0 Hz, the V/f characteristics yield an output voltage of 0 V. The
voltage boost must be entered to:
● Magnetize the induction motor.
● Maintain the load.
● Compensate for the losses (ohmic losses in the winding resistors) in the system
● Generate a breakaway/acceleration/braking torque.
The voltage boost can be increased permanently (p1310) or during acceleration (p1311).
Figure 5-2
Note
The voltage boost affects all V/f characteristics (p1300).
NOTICE
If the voltage boost value is too high, this can result in a thermal overload of the motor
winding.
186
Voltage boost total
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions