Observer-controller scheme using high order sliding mode techniques for sensorless speed control of permanent magnet synchronous motor

This paper deals with the control problem of the speed for a sensorless permanent magnet synchronous motor (PMSM) using high order sliding mode techniques. An observer is designed via a super twisting algorithm in order to estimate the speed and the position of the motor from the currents and the voltages measurements. A quasi-continuous high order sliding mode controller is designed in order to the speed tracks a desired reference under the presence of parameter uncertainties. Simulation results are shown in the framework of an industrial benchmark to illustrate the performance of the proposed scheme. The results are obtained in spite of parameter uncertainties on stator resistance and stator inductance that are bad known.

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