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Precise position control using a PMSM with a disturbance observer containing a system parameter compensator

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5 Author(s)
Choi, S.-H. ; Dept. of Electron., Kyungpook Nat. Univ., Daeku, South Korea ; Ko, J.-S. ; Kim, I.D. ; Park, J.-S.
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A deadbeat load torque observer with a system parameter compensator that can be used to improve the performance of a permanent-magnet synchronous motor in a precision position control system is presented. The compensator makes real systems work as it in a nominal parameter system. Therefore, the observer has a performance level equivalent to that obtained if there is no parameter variation. Noise effects are reduced by the use of past-filter implemented using a moving-average process. A comparison study on the system response for a convertional deadbeat gain observer and the proposed parameter-compensated deadbeat observer is performed. The proposed system can be used to cancel out any steady-state or transient position errors created by external disturbances such as friction, load torque or chattering effects.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:152 ,  Issue: 6 )

Date of Publication:

4 Nov. 2005

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