Parker AC30V Series, Product Manual

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D-39
Parameter Reference
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
1 0
. 1 1
) (
1
1
) (
1





 


z b
z a a
z H
s
s H

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
. 1 1
) (
1
1
) (
1
 

 


z b
a
z H
s
s H

PHASE ADVANCE : Gives a phase advance between Frequency 1 and Frequency 2 .
1
1
1 0
2
1
. 1 1
) (
1
1
) (
1





 
 


z b
z a a
z H
s
s
s H


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
1 0
2
2
2
2
2 2
2 2
. 1
) (
2 1
1
2
. 1 ) (
1
 
 
  
  

 


 



z b z b
z a z a a
z H
s s
s
s s
s
s H
 


 

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