Speed control of multilevel inverter-based induction motor using V/F method

Abstract

In this paper, the speed of a three-phase induction motor is controlled by using modified cascaded five-level inverter and we compared the total harmonic distortion of the modified cascaded five-level inverter with the conventional threelevel inverter. To reduce the total harmonic distortion, multicarrier PWM is used. An open-loop speed control has been achieved by using V/f method. The simulation result gives that the modified cascaded five-level inverter effectively controls the motor speed and enhances the drive performance through reduction in total harmonic distortion (THD).