Three Phase Hybrid Multilevel Inverter Using Switched Capacitor Units Fed with Industrial Drive Applications

Abstract

Recently multilevel inverters (MLI) gained researchers interest due to efficient power conversion with multiple voltage steps resultingin improved power quality, reduced switching losses, higher electromagnetic
compatibility and better voltage capability. This paper highlights a hybrid multilevel inverter for A.C electrical drives. In recent days multilevel inverters has become very popular for motor drive applications of industry. This hybrid topology has more advantageous of industrial applications. In this paper two new topologies have been proposed for multilevel inverters. The proposed topologies consist of a combination of the conventional series and the switched capacitor inverter units. The bad quality of voltage as well as current of a traditional Inverter feasted Induction machine is on account of the availability of harmonics. This is exactly overwhelmed in multilevel inverter with significant measures which may produce premium quality voltage waveforms .The multilevel inverter output possesses diminished harmonics and also greater torque. Moreover it minimizes the heat produced in the stator winding of the induction motor. The proposed method introduces 17, 25 levels and three phase 25level Inverter fed Induction Motor drive. With the use of high level inverter, resolution is increase and also the harmonics is highly reduced.The simulation results are presented by using Matlab/simulink software.