A comparative study of V/f controlled IM using two and three level bus clamped SVM

Abstract

This paper presents a Bus clamped SVM (BCSVM) for two level (2L) and three level (3L) inverter fed induction motor (IM) drive using V/f control. The BCSVM clamps any of the bus in each sector for a given switching period. The V/f control scheme is simulated in the MATLAB environment using both two and three level BCSVM. The operating characteristics of 3LBCSVM inverter fed induction motor drive during starting, step speed, and step load are tested and compared its performance with the 2LBCSVM. The torque and flux distortion of the IM for 3LBCSVM are less with less current and voltage total harmonic distortion (THD). Moreover, the capacitor voltage balance problem is analyzed in three-level diode clamped inverter and obtains the optimum switching states to balance the capacitor voltage of the inverter.