Performance of Three Level Neutral Clamped PWM Inverter Fed Induction Motor Drive

摘要

This study presents the simulation of three level neutral clamped PWM inverter fed induction motor. The poor quality of current and voltage of a conventional inverter fed induction machine is due to the presence of harmonics. Using multilevel inverter harmonic content can be reduced. In symmetrical circuit the voltage and power increases with the increase in level of inverter. As power devices have been added in multilevel inverter structure, the voltage waveform has more redundant switching states, so that switching angle can be chosen for harmonic reduction. The simulation results closely agree with the theoretical results.