Delta ASDA-B2-F Series User Manual

ASDA-B2-F Control Mode of Operation
September, 2015 6-21
6
Here illustrates the effect via low-pass filter (parameter P2-25). The following figure is the system
open-loop gain with resonance.
Gain
Frequency
When the value of low-pass filter (parameter P2-25) is increased from 0, BW becomes smaller
(See the following figure). Although it improves the situation of resonance frequency, the
response bandwidth and phase margin are reduced as well.
If users know the resonance frequency, notch filter (P2-23 and P2-24) can directly eliminate the
resonance. The frequency setting range of the notch filter is merely from 50 to 1000 Hz. The
suppression strength is from 0 to 32 dB. If the resonance frequency is not within the range, it is
suggested to use low-pass filter (P2-25) to decrease the resonance intensity.
Here firstly illustrates the influence brought by notch filter (P2-23 and P2-24) and low-pass filter
(P2-25). The following figures are the system of open-loop gain with resonance.
Resonance suppression with notch filter:
Resonance Point
B.W
Resonance
Frequency
+
Gain
Attenuation Rate
P2-24
Resonance
Frequency P2-23
Frequency
0db
Notch Filter
Frequency
Gain
=
Resonance condition is
suppressed
B.W
Resonance
Frequency
Gain
Frequency
0dB
BW
Gain
Frequency

Delta ASDA-B2-F Series Specifications

General

Brand	Delta
Model	ASDA-B2-F Series
Category	Servo Drives
Language	English