Siemens SINAMICS G120 CU230P-2, Operating Instructions Manual, Page: 212 / 346

Functions
7.6 Motor control
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
210
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
7.6.2 Vector control
7.6.2.1 Properties of 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.
7.6.2.2 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 the BOP-2 (Page 63)
● Commissioning with STARTER (Page 68)
Optimizing vector control
● Carry out the automatic speed controller optimization using (p1960 = 1)
Table 7- 26 The most important vector control parameters
Parameter Description
P1300 = 20 Control type: Vector control without speed encoder
p0300 …
p0360
Motor data is transferred from the rating plate during basic commissioning and
calculated with the motor data identification
p1452 …
p1496
Speed controller parameters
p1511 Additional torque
p1520 Upper torque limit
p1521 Lower torque limit
p1530 Motoring power limit
p1531 Regenerative power limit
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