Parker AC30 series - Page 311

Parameter Reference D-39
AC30V series Variable Speed Drive
PNO Parameter Descriptions
1544 Filter Type
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
.1
1
)
(
1
1
)
(
1
−
−
+
+
=
⋅
+
=
−
z
b
z
aa
zH
s
s
H
τ
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
τ
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
τ
τ
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
ωω
ξ
ω
ωξω
ω
1545 Cut Off Frequency
3dB attenuation frequency if Filter Type is MAX ATTENUATION or MINIMUM PHASE
Frequency of Zero transmission if
Filter Type
is
NOTCH
1546 Frequency 1
Frequency 1 if Filter Type is PHASE ADVANCE
1547 Frequency 2
Frequency 2 if
Filter Type
is
PHASE ADVANCE
1548 Factor
Damping factor if Filter Type is NOTCH
www.comoso.com