Inertia And Friction Compensation Block (Inertia / Frict Cp) - GE AV-300i User Manual

The Speed feedback derivative Block is shown in the figure below.
Speed
Speed fbk deriv cfg
Sfbk der enable
Spfbk der gain
Sfbk der base
Sfbk der filter

1.8.10 Inertia and Friction Compensation Block (Inertia / Frict cp)

The Function is active only in a Sensorless and Field oriented mode.
The Block Function is to compensate the Inertia and the Frictions caused by the loads during the motor accelera-
tion or deceleration phase.
The function, by calculating the acceleration on the reference, is in a position to supply a Torque FeedForward.
Such condition allows a better regulation in the presence of loads with a high inertia.
The parameter calculation is performed during the self-tuning procedure of the speed loop.
As an alternative, the user can set the parameters by hands.
The source, I/F cp en src allows to select the origin of the to enable or disable the function. Inertia src allows
to select the origin of the command signal moment of inertia; default this is connected to Int Inertia (stare
value) that it possible to set in the configurations.
Morever in the Block configurations it is possible with Int Friction to set the friction value and with Inertia cp
flt to state the time constant of the filter on the compensation.
The Block input is:
Description:
SPEED CONFIG Inertia/Frict cp
SPEED CONFIG SAVE PARAMETERS
Ch.1
108
+
IN
_
Z-1
Spfbk der gain
Function enabling (enable or disable)
% Gain value
Basic value of the % gain
Time constant of the Derivative component
· I/F cp en src
· Inertia src
I/F cp en src
I/F cp en src
Inertia src
I/F cp cfg
Int Inertia
Int Friction
Inertia cp flt
I/F cp mon
I/F cp mon
—————— Function Description ——————
GEH-6641E
X
Sfbk der filter
Sfbk der base Sfbk der enable
Speed up out