DTFC-SVM for Three-Level Diode Clamped Inverter Fed IM Drive

This paper presents a direct torque and flux control with space vector modulation (DTFC-SVM) for a three-level diode clamped inverter (3LDCI) fed induction motor drive (IMD) using proportional-Integral controller (PIC). Diode-clamped inverters are the most widely used topology of multilevel inverters in high-power applications. The DTFC-SVM of an IMD using two-level inverter (2LI) provides large ripple contents in torque, flux and stator currents. In order to reduce the ripple contents in torque, flux and stator currents, a 3LDCI based DTFC-SVM method is proposed. In order to show the effectiveness of the proposed method, it is simulated in a MATLAB/SIMULINK environment. The performance of the IMD is simulated under various operating conditions.