Using a weighting factor table for FCS-MPC of induction motors with extended prediction horizon

In this paper a novel two-step prediction Finite Control Set Model Predictive Control (FCS-MPC) strategy with weighting factor look up table and divided control interval is presented. The method can be applied for a two-level inverter because of its low torque ripple. The weighting factor in cost function is selected via a look up table which is based on torque ripple minimization. Two-step prediction method is combined with dividing the control interval in two parts: active time for applying the active voltage vectors (AVV) and zero time for applying the zero voltage vector (ZVV). By using this technique the prediction horizon is doubled without serious increase of calculation burden. Simulation and experimental results prove the validity of the proposed method in a wide range of speed.