Abstract
AbstractIn this paper it is presented an asymptotically stable sensorless controller for a non–salient permanent magnet synchronous motor that is perturbed by an unknown constant load torque. The proposed scheme is a fourth order nonlinear observer–based scheme that does not rely on—intrinsically nonrobust—operations like open-loop integration of the systems dynamical model nor signal differentiation, and can be easily implemented in real time. The controller is easy to commission, with the tuning gains directly determining the convergence rates of the position, speed and load torque observers. Experimental results that illustrate the usefulness of the scheme are presented.
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