DTFC-SVM based Five-level cascaded Inverter with reduced switches fed Interior Type Permanent Magnet Synchronous Motor Drive

This paper presents direct torque and flux control with space vector modulation (DTFC-SVM) based five level cascaded multi-level inverter (MLI) fed interior type permanent magnet synchronous motor drive (IPMSMD), for high power industrial applications. In high power applications, the ripple contents in torque or currents are more harmful, which reduces the performance of the drive. The multi-level inverter (five-level) plays a vital role in high power applications, it helps to reduce the torque and current ripples. However, more switching transients is the drawback of MLI’s, it can be minimized by using reduced number of switches based MLI. The proposed DTFC-SVM based PMSM drive provides very less ripple contents in stator flux and electromagnetic torque. Further, it also gives very less total harmonic distortion (THD) in stator winding voltages and currents, which results excellent steady state and dynamic performance of motor drive. The proposed method is simulated in MATLAB/SIMULINK software and also compared the proposed method results with three-level DTFC-SVM fed IPMSMD. The proposed method shows the better performance improvement over three-level, under different operating conditions like no-load, full load, speed reversal and speed tracking conditions.