Speed tracking control of a permanent-magnet synchronous motor withstate and load torque observer
Guchuan Zhu; Dessaint, L.-A.; Akhrif, O.; Kaddouri, A.
Industrial Electronics, IEEE Transactions on
Volume 47, Issue 2, Apr 2000 Page(s):346 - 355
Digital Object Identifier 10.1109/41.836350
Summary: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
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