Torque Control - Siemens SINAMICS G120 Operating Instructions Manual

Advanced commissioning
6.21 Motor control
6.21.4

Torque control

Torque control is part of the vector control and normally receives its setpoint from the speed
controller output. By deactivating the speed controller and directly entering the torque setpoint,
the closed-loop speed control becomes closed-loop torque control. The inverter then no longer
controls the motor speed, but the torque that the motor generates.
Figure 6-62 Simplified function diagram of the closed-loop torque control
Typical applications for torque control
The torque control is used in applications where the motor speed is specified by the connected
driven load. Examples of such applications include:
● Load distribution between master and slave drives:
The master drive is speed controlled, the slave drive is torque controlled.
● Winding machines
The most important settings
Prerequisites for the correct functioning of the torque control:
● You have set the motor data correctly during the quick commissioning
● You have performed a motor data identification on the cold motor
Parameter
p1300
p0300 ...
p0360
314
Quick commissioning with a PC (Page 134)
Description
Control mode:
22: Torque control without speed encoder
Motor data is transferred from the motor type plate during quick commissioning and
calculated with the motor data identification
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG