Parker AC30 series - Filter on Torque DMD

C-74 Parameter Reference
AC30 series Variable Speed Drive
Filter On Torque Dmd
Parameters::Motor Control::Filter On Torque Dmd
This feature allows to select the type of filter applied to the Torque setpoint:
- Either the output of the speed loop PI corrector if the speed loop is active
- Or the torque Setpoint .
PI Controller
Torque Limits
Filter On
Torque
Dmd
Speed Demand
Speed Feedback
Torque Setpoint
Speed or
Torque Control
Torque Demand
The general structure of the filter is given below :
a0
a1
a2
-b1
-b2
Z
-1
Z
-1
X(n) Y(n)
2
2
1
1
2
2
1
10
..1
..
)(
−−
−−
++
+
+
=
zbzb
zazaa
zH
or 

=
21
1122110 −−−−
⋅−⋅−⋅+⋅+⋅
nnnnn
ybybxaxaxa