Setting functions
8.5 Motor control
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
255
Closed-loop speed control
8.5.2.1
Properties of the sensorless vector control
Sensorless vector control
Using a motor model, the speed 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.
Speed control is possible without directly measuring the motor speed and is therefore also
called "sensorless vector control".
Figure 8-20 Simplified function diagram of sensorless vector control
You can find additional information on speed control in the function diagrams 6020 ff. of the
List Manual.
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