Vector Control With Speed Controller; Structure Of The Vector Control - Siemens Sinamics CU240D-2 DP Operating Instructions Manual

6.15.2

Vector control with speed controller

6.15.2.1

Structure of the vector control

Overview
The vector control comprises closed-loop current control and a higher-level closed-loop
speed control.
for induction motors
1)
Selecting the control mode
2)
Settings that are required
3)
Figure 6-39 Simplified function diagram for vector control with speed controller
Using the motor model, the inverter calculates the following closed-loop control signals from
the measured phase currents and the output voltage:
● Current component I
● Current component I
● Speed actual value for encoderless vector control
The setpoint of the current component I
speeds above the rated speed, the inverter reduces the flux setpoint along the field
weakening characteristic.
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
q
q
(flux setpoint) is obtained from the motor data. For
d
Advanced commissioning
6.15 Motor control
197