ABB ACS880 - Page 320

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
0.000 / real32Defines the damping coefficient for parameter 24.14.
The value of 0 corresponds to the maximum elimination
of the resonance frequency.
20
0
-20
-40
-60
0
50
100
150
f (Hz)
f
zero
= 45 Hz
ξ
zero
= 0
ξ
pole
= 1
f
zero
= 45 Hz
ξ
zero
= 0.250
ξ
pole
= 1
20log
10
|H (ω)|
Note: To ensure that the resonance frequency band is
filtered (rather than amplified), the value of 24.15 must
be smaller than 24.17.
Damping of zero24.15
100 = 1 / 1000 = 1Damping coefficient.-1.000 ... 1.000
40.00 Hz / real32Defines the frequency of pole of the resonance
frequency filter.
40
20
0
-20
-40
-60
0
50
100
f (Hz)
20log
10
|H (ω)|
f
zero
= 45 Hz, f
pole
= 50 Hz
ξ
zero
= 0, ξ
pole
= 0.250
f
zero
= 45 Hz
f
pole
= 40 Hz
ξ
zero
= 0
ξ
pole
= 0.250
f
zero
= 45 Hz
f
pole
= 30 Hz
ξ
zero
= 0
ξ
pole
= 0.250
Note: If this value is very different from the value of
24.14, the frequencies near the frequency of pole are
amplified, which can damage the driven machine.
Frequency of pole24.16
1 = 1 Hz / 100 = 1 HzFrequency of pole.0.50 ... 500.00 Hz
320 Parameters