THREE PHASE SEVENTEEN LEVEL SINGLE SWITCH CASCADED MULTILEVEL INVERTER FED INDUCTION MOTOR

Induction motors are widely used in industries, because they are rugged, reliable and economical. Induction motor drive requires suitable converters to get the required speed and torque without or negligible ripples. In recent years, multilevel inverters are becoming increasingly popular for high-power applications due to their improved harmonic profile and increased power ratings. Several studies have been reported in the literature on multilevel inverters topologies, control techniques, and applications. Multilevel inverters produce a staircase output voltage from DC voltage sources. Requiring great number of semiconductor switches and this is main disadvantage of the multilevel inverters. Application of multilevel inverter for high power equipments in industry has become popular because of its high-quality output waveform. In this paper, a three phase seventeen level singe switch cascaded multilevel inverter is proposed with reduced number of switches, harmonic content and losses. An algorithm has been generated on the basis of optimized harmonic stepped waveform technique (OHSWT) to find out firing angle for multilevel inverter with unequal DC sauces to reduce harmonic content present in output. The main attention behind the objective of proposed project seventeen level Single Switch Cascade multilevel inverter topology is to achieve the high power quality, low total harmonic distortion and better power factor which is connected to 3-Phase induction motor. The THD and speed torque analysis of 3-phase IM are simulated using MATLAB/SIMULINK software.