Hybrid topology for multilevel inverter with reduced circuit switches using carrier based PWM scheme

This paper introduces a hybrid topology for multilevel inverter that operates in asymmetric manner. The proposed topology is generalized using series connection of basic module. It offers less number of switches and isolated dc voltage sources as compared to conventional and recent proposed topologies. Carrier based level shift sinusoidal pulse width modulation scheme is adopted for generating switching signals. To verify the performance of proposed topology, a prototype of single phase 11-level inverter has been developed and tested. Also 11-level and 23-level inverter are simulated using MATLAB/SIMULINK environment and validated experimentally.