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A load torque compensation scheme under the speed measurement delay

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2 Author(s)
Kickul Hong ; Dept. of Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea ; Kwanghee Nam

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

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:45 ,  Issue: 2 )

Date of Publication:

Apr 1998

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