User Manual V 1-4.XX User guide

Control Block Diagrams B-15
Notice that Fdbk Filter Gain (parameter 66) and Fdbk Filter BW
(parameter 67) are used for the single pole lead/lag filter. Fdbk Filter
Gain lets you specify the Kn term of the single power lead/lag filter.
Fdbk Filter BW lets you set the breakpoint frequency (in radians) for
the speed feedback lead/lag filter. The breakpoint frequency is
indicated by BW.
A single pole
lead/lag
feedback filter
3
If Kn is: Then:
Greater than 1.0 A lead filter is produced.
Less than 1.0 A lag filter is produced.
Equal to 1.0 The feedback filter is disabled.
Equal to 0.0 A simple, low pass filter is produced.
To select
this type of filter:
Select this
value:
rad/sec
gain
Par. 67
For Par. 66
between 0
and 1.0
0 db
rad/sec
gain
Par. 67
For Par. 66
equal to 0
0 db
BW
A notch filter is also available through Fdbk Filter Sel. Information
about the notch filter is provided in the Torque Reference Overview
section of this appendix.