Enhanced Finite Control Set Model Predictive Control for a Diode-Clamped Indirect Matrix Converter

Matrix converters in high-power applications have certain constraints such as high total harmonic distortion (THD) of the source current as well as significant switching power losses. This study presents an advanced finite control set model predictive control (FCS-MPC) for a three-level indirect matrix converter to address these problems. To do this, a novel constraint is introduced in the cost function of the proposed FCS-MPC method to reduce the switching frequency while improving the quality of the source current. The results show that by decreasing the switching frequency by 3.4 kHz, the proposed method can further diminish the THD of the supply current by approximately 4% compared to the conventional methods. The effectiveness of the proposed method is validated through the simulations in Matlab/Simulink.