Vector Control; Commissioning Vector Control - Siemens SINAMICS G120 Operating Instructions Manual

8.6.2

Vector control

Using a motor model, the vector control calculates the load and the motor slip. As a result of
this calculation, the inverter 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. This closed-loop
control is also known as sensorless vector control.
8.6.2.1

Commissioning vector control

Vector control only functions error-free if, during the basic commissioning, the motor data
were correctly parameterized and a motor data identification was performed with the motor in
the cold state.
You can find the basic commissioning in the following sections:
● Commissioning with Operator Panel BOP-2 (Page 56)
● Commissioning with STARTER (Page 61)
Optimizing vector control
● Carry out the automatic speed controller optimization using (p1960 = 1)
Table 8- 23
Parameter
P1300 = 20
p0300 ...
p0360
p1452 ...
p1496
p1511
p1520
p1521
p1530
p1531
Additional information about this function is provided in the parameter list and in function
diagrams 6030 onwards in the List Manual.
You will find more information On the internet:
(http://support.automation.siemens.com/WW/view/en/7494205):
SINAMICS G120C Inverter
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
The most important vector control parameters
Description
Control type: Vector control without speed encoder
Motor data is transferred from the rating plate during basic commissioning and
calculated with the motor data identification
Speed controller parameters
Additional torque
Upper torque limit
Lower torque limit
Motoring power limit
Regenerative power limit
Functions
8.6 Motor control
189