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Speed tracking control of a permanent-magnet synchronous motor with state and load torque observer

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4 Author(s)
Guchuan Zhu ; Dept. of Electr. Eng., Ecole de Technol. Superieure, Montreal, Que., Canada ; Dessaint, L.-A. ; Akhrif, O. ; Kaddouri, A.

This paper is concerned with the speed tracking control problem for a permanent-magnet synchronous motor (PMSM) in the presence of an unknown load torque disturbance. After a brief review of the mathematical model of the PMSM, a speed tracking control law using the exact linearization methodology is introduced. The tracking control algorithm is completed by adding an extended observer which provides, on the one hand, the motor speed and acceleration and, on the other hand, estimates the unknown load torque. The stability of the closed-loop system composed of a nonlinear speed tracking controller and an observer is studied by the way of Lyapunov theory. Furthermore, the decoupling of the state observer and the load torque observer is discussed. Finally, a real-time implementation and the experimental results of the proposed control strategy are presented

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:47 ,  Issue: 2 )

Date of Publication:

Apr 2000

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