Moment Of Inertia Estimator - Siemens Sinamics G110M Operating Instructions Manual

Advanced commissioning
6.17 Motor control
Parameter
p3845
p3846
p3847
You will find more information in the List Manual.
6.17.2.5

Moment of inertia estimator

Background
From the load moment of inertia and the speed setpoint change, the inverter calculates the
accelerating torque required for the motor. Via the speed controller precontrol, the
accelerating torque specifies the main percentage of the torque setpoint. The speed
controller corrects inaccuracies in the precontrol (feed-forward control).
Figure 6-53
The more precise the value of the moment of inertia in the inverter, the lower the overshoot
after speed changes.
Figure 6-54
246
Explanation
Activate friction characteristic plot (factory setting: 0)
0: Friction characteristic plot deactivated
1: Friction characteristic plot activated, both directions
2: Friction characteristic plot activated, positive direction
3: Friction characteristic plot activated, negative direction
Friction characteristic plot ramp-up/ramp-down time (factory setting: 10 s)
Ramp-up/ramp-down time for automatic plotting of the friction characteristic.
Friction characteristic plot warm-up period (factory setting: 0 s)
At the start of automatic plotting, the inverter accelerates the motor up to the speed =
p3829 und keeps the speed constant for this time.
Influence of the moment of inertia estimator on the speed control
Influence of the moment of inertia on the speed
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 09/2017, FW V4.7.9, A5E31298649B AH