Voltage Boost - Siemens SINAMICS G220 Operating Instructions Manual

14.10.4.2

Voltage boost

Overview
The voltage boost at low speeds improves the startup behavior of the motor.
Description of function
In the following circumstances, the motor cannot accelerate to its speed setpoint after it has
been switched on:
• Load moment of inertia is too high
• Load torque is too large
• Ramp-up time p1120 is too short
The converter boosts the voltage corresponding to the starting currents p1310 ... p1312.
Figure 14-107
Parameters
The following list contains the parameters of the "Optimize motor startup" function.
Number
r0071
p0310[0...n]
p1310[0...n]
p1311[0...n]
p1312[0...n]
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Resulting voltage boost using a linear characteristic as example
Name
Maximum output voltage
Rated motor frequency
Starting current (voltage boost) permanent
Starting current (voltage boost) when accelerating
Starting current (voltage boost) when starting
Functions
14.10 Closed-loop drive control
Unit
[Vrms]
[Hz]
[%]
[%]
[%]
497