DTFC-SVM for five-Level Cascaded Inverter Fed IM Drive with reduced switches

This paper presents, a direct torque and flux control with space vector modulation (DTFC-SVM) for a five-level cascaded reduced switch inverter (5LCI) fed induction motor drive (IMD) based on the simple two-level methodology using proportional-integral controller (PIC). Cascaded bridge inverters are the most widely used topology of multilevel inverters in electric drive applications. The DTFC-SVM of an IMD using three-level inverter (3LI) provides large ripple contents in torque, flux and stator currents. In order to reduce the ripple contents in torque, flux and stator currents, a 5LCI based DTFC-SVM method is proposed with reduced switches. In order to show the effectiveness of the proposed method, it is simulated in the MATLAB/SIMULINK environment. The performance of the IMD is simulated under various operating conditions.