Vector Control - Siemens SINAMICS G120D Operating Instructions Manual

8.5.2

Vector control

Sensorless vector control
Using a motor model, the vector control calculates the load and the motor slip. As a result of
this calculation, the converter controls its output voltage and frequency so that the motor
speed follows the setpoint, independent of the motor load.
Vector control is possible without directly measuring the motor speed and is therefore also
called "sensorless vector control".
Figure 8-16 Simplified function diagram of sensorless vector control
You can find additional information on the vector control in the List Manual in function
diagrams 6020 ff.
Vector control with encoder
Instead of the calculated speed from the motor model, the vector control with encoder
evaluates an encoder.
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA
Setting functions
8.5 Motor control
135