Parker AC30 - Page 329

Parameter Reference D-69
AC30 series Variable Speed Drive
Parameter Name
No.
Path
Default
Range
Units
Writable
Filter Type
1544
Parameters::Motor Control::Filter On
Torque Dmd
0
0:NONE
1:MAX ATTENUATION
2:MINIMUM PHASE
3:PHASE ADVANCE
4:NOTCH
ALWAYS
NONE : no filter applied – no parameter selection
MAX ATTENUATION : First Order Low Pass Filter (Butterworth form). 3dB attenuation frequency given by Cut Off Frequency.
1
1
10
.11
)(
1
1
)(
1








zb
zaa
zH
s
sH

MINIMUM PHASE : First Order Low Pass Fitler (similar to preceeding, but with less phase shift and less efficient roll off
characteristics). 3dB attenuation frequency given by Cut Off Frequency.
1
0
.11
)(
1
1
)(
1






zb
a
zH
s
sH

PHASE ADVANCE : Gives a phase advance between Frequency 1 and Frequency 2.
1
1
10
2
1
.11
)(
1
1
)(
1









zb
zaa
zH
s
s
sH


NOTCH : Zero transmission notch at a frequency given by Cut Off Frequency. The damping factor is given by Factor.
2
2
1
1
2
2
1
10
2
2
2
2
22
22
.1
)(
21
1
2
.1)(
1












zbzb
zazaa
zH
ss
s
ss
s
sH





Cut Off Frequency
1545
Parameters::Motor Control::Filter On
Torque Dmd
2000
20 to 6000
Hz
ALWAYS
3dB attenuation frequency if Filter Type is MAX ATTENUATION or MINIMUM PHASE
Frequency of Zero transmission if Filter Type is NOTCH