User manual

ASDA-A User Manual Chapter 6 Control Modes of Operation
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED 4th Edition 2005/11/30, HE03
6-27
6-3-7 Resonance Suppression
The resonance of mechanical system may occur due to excessive system stiffness or frequency response.
However, this kind of resonance condition can be improved, suppressed, even can be eliminated by using
low-pass filter (parameter P2-25) and notch filter (parameter P2-23, P2-24) without changing control
parameter.
P2 - 23 NCF
Notch Filter Frequency of Resonance Suppression
Communication Addr.: 0217H
Default: 1000 Applicable Control Mode: P/S/T
Range: 50~1000
Unit: Hz
P2 - 24 DPH
Notch Filter Attenuation Ratio of Resonance
Suppression
Communication Addr.: 0218H
Default: 0 Applicable Control Mode: P/S/T
Range: 0~32
Unit: dB
0: Disabled
P2 - 25 NLP
Low-pass Filter Time Constant of Resonance
Suppression
Communication Addr.: 0219H
Default: 2 (1KW and below models) or Applicable Control Mode: P/S/T
5 (1KW and below above models)
Range: 0~1000
Unit: msec
P2-07
P2-25
PI Controller
(Proportional and
Integral Controller)
P2-04,2-06
PWM
P2-23,P2-24
differentiator
Encoder
Feed forward
Gain
Speed estimator
Speed Control Block Diagram
Low-pass
Filter
Notch Filter
To r qu e
Load
Current Sensor
Current Controller