Delta ASD-M-0721 Series User Manual

ASDA-M Chapter 6 Control Mode of Operation
Revision December, 2014 6-45
Gain
Frequency
When the value of P2-25 is increased from 0, BW becomes smaller (See as the following
diagram). Although it solves the problem of resonance frequency, the response
bandwidth and phase margin is reduced.
0dB
BW
Gain
Frequency
If users know the resonance frequency, notch filter (parameter P2-23 and P2-24) can
directly eliminate the resonance. The frequency setting range of notch filter is merely
from 50 to 1000Hz. The suppression strength is from 0 to 32dB. If the resonance
frequency is not within the range, it is suggested to use low-pass filter (parameter P2-25).
Here firstly illustrates the influence brought by notch filter (P2-23 and P2-24) and
low-pass filter (P2-25). The following diagrams are the system of open-loop gain with
resonance.
Resonance suppression with notch filter
0db
Notch Filter
Attenuation
Rate P2-24
Resonance
Frequency
.
Resonance
Point
Gain
Frequency
.
Gain
Frequency
Gain
Frequency
Low-pass
Frequency
Low-pass
Frequency
Resonance
Frequency
P2-23
Resonance
conditions
is suppressed
Resonance
Frequency

Delta ASD-M-0721 Series Specifications

General

Brand	Delta
Model	ASD-M-0721 Series
Category	Servo Drives
Language	English