A load torque compensation scheme under the speed measurement delay
Kichul Hong
Kwanghee Nam
Dept. of Electr. Eng., Pohang Inst. of Sci. & Technol.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Apr 1998
Volume: 45,
Issue: 2
On page(s): 283-290
ISSN: 0278-0046
References Cited: 13
CODEN: ITIED6
INSPEC Accession Number: 5885053
Digital Object Identifier: 10.1109/41.681227
Current Version Published: 2002-08-06
Abstract
The average speed detection method involves a measurement delay,
which can cause a serious instability problem to the unknown load torque
observer. The instability can be cured by inserting an artificial delay
into the torque-filtering path of the observer. Also, by utilizing the
concept of the phase lead compensator, we propose a method of designing
an arbitrary high-order low-pass filter (Q filter). Through the results
of simulation and experiments, we show that our proposed method yields
more robust and improved results than the conventional load torque
observer
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