Motor Control; Reactor, Filter And Cable Resistance At The Converter Output - Siemens SINAMICS G120C Operating Instructions Manual

8.20

Motor control

Overview
The converter has two alternative methods to ensure the motor speed follows the configured
speed setpoint:
• U/f control
• Vector control
8.20.1

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 or sine-wave filter
In the factory setting, for the motor data identification, the converter assumes that neither
output reactor nor sine wave filter are 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.
You have set the reactor, filter and cable resistance between the converter and motor.
❒
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
Commissioning (Page 119)
Advanced commissioning
8.20 Motor control
299