A Refined Predictive Torque Control for Two-Level Voltage Source Inverter of Induction Motor

Abstract

This paper presents a refined finite-state predictive torque control (FS-PTC) for two-level Voltage Source Inverter (2L-VSI) of induction motor (IM) by introducing a specific voltage vector selection lookup table to the algorithm. The concept behind this method is to decrease the number of voltage vectors (VVs) instead of using seven voltage vectors (VVs) to test the cost function, resulting in a substantial reduction in the algorithm's analytical terms. MATLAB/ Simulink is used to analyze the efficiency of the refined algorithm under torque dynamic condition (staircase speed reference). The results of the simulations indicate that the refined algorithms able to regulate torque performance but not the stator flux performance or the total harmonic distortion (THD) stator current. Nevertheless, by increasing the weighting factor, it could reduce the flux ripple and decrease the THD current.