6.7
Motor control
Overview
The converter has two alternative methods to ensure the motor speed follows the configured
speed setpoint:
● U/f control
● Vector control
6.7.1
Reactor, filter and cable resistance at the converter output
Overview
Components between the converter and the motor influence the closed-loop control quality of
the converter:
● Output reactor
In the factory setting, the converter assumes for the motor data identification that no output
reactor is connected at the converter output.
● Motor cable with unusually high cable resistance.
For the motor data identification, the converter assumes a cable resistance = 20 % of the
stator resistance of the cold motor.
Function description
You must correctly set the components between the converter and motor to achieve an
optimum closed-loop control quality
Procedure
1. Set p0010 = 2.
2. Set the cable resistance in p0352.
3. Set p0230 to the appropriate value.
4. Set p0235 to the appropriate value.
5. Set p0010 = 0.
6. Carry out the quick commissioning and the motor identification again.
Quick commissioning using the BOP-2 operator panel (Page 159)
You have set the reactor, filter and cable resistance between the converter and motor.
❒
Advanced commissioning
6.7 Motor control
SINAMICS G120X converter
376
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
