Position control performance improvement of DTC-SVM for an induction motor: Application to photovoltaic panel position

This paper deals with the adaptive sliding mode control DTC-SVM approach dedicated to the position control of photovoltaic panels according to the maximum sunshine position to allow a high efficiency of photovoltaic systems. The paper is devoted to the presentation of a comparison study between three DTC-SVM strategies applied to the position control of an induction motor: (i) a DTC-SVM strategy using PI controllers, (ii) a DTC-SVM strategy using PI controllers with a nonlinear compensator, and (iii) a DTC-SVM strategy using sliding mode controllers. It has been found that a reduction of the flux and the torque ripples, as well as the stator current distortion, have been gained going from the first strategy to the third one. These affirmations are proved by numerical index criteria, such as the torque ripple, the flux ripple and the total harmonic distortion of stator currents. Furthermore, and using an adaptive estimator of motor parameters, the robustness with respect to parameter variations of the induction motor is also tested. These performances are confirmed by simulation works.