Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 187
8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless control for synchronous motors (SLPSM)
5.8.4.3 Optimise response to setpoint changes and determine mass inertia
Setting the total moment of inertia under C00273
provides the optimum torque
feedforward control. Depending on the application, an adjustment of the setting under
C00273
may be necessary to optimise the response to position/speed setpoint changes by
means of the torque feedforward control.
[5-15] Typical signal characteristics for different settings of the load moment of inertia
Without feedforward control: C00273 set too low:
C00273
set too high: Optimum feedforward control:
n Actual speed value (signal nMotorSpeedAct)
o Speed setpoint (signal nMotorSpeedSet)
p Speed controller output (signal nOutputSpeedCtrl)
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