Optimizing The Speed Controller - Siemens SINAMICS G120C Operating Instructions Manual

Advanced commissioning
8.20 Motor control
Default settings after selecting the application class Dynamic Drive Control
Selecting application class Dynamic Drive Control adapts the structure of the vector control and
reduces the setting options:
Hold or set the integral component of the
speed controller
Acceleration model for precontrol
Motor data identification at standstill or with
rotating measurement
8.20.3.2

Optimizing the speed controller

Optimum control response - post optimization not required
Preconditions for assessing the controller response:
• The moment of inertia of the load is constant and does not depend on the speed
• The converter does not reach the set torque limits during acceleration
• You operate the motor in the range 40 % ... 60 % of its rated speed
If the motor exhibits the following response, the speed control is well set and you do not
have to adapt the speed controller manually:
312
Vector control after
selecting the applica‐
tion class Dynamic
Drive Control
Not possible
Default setting
Shortened, with op‐
tional transition into
operation
The speed setpoint (broken line) increases with the set ramp-up
time and rounding.
The speed actual value follows the setpoint without any over‐
shoot.
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
Vector control without se‐
lecting an application class
Possible
Can be activated
Complete
SINAMICS G120C Converters