Development of Modified Cascaded Multilevel Inverter Configuration with Less Number of Switches

A new cascaded configuration of multi level inverter with reduced switching devices compared to conventional scheme is proposed. Proposed configuration has further advantages of less total harmonic distortion in output voltage and less current rating of the devices compared to the conventional scheme. Detailed analytical study has been made using proposed configuration for both 5-level and 11-level inverter. Hardware implementation of the modified topology has been made for 5 level inverter. Different modulation techniques have also been tried to validate the proposed concept. The proposed structure reduces the device count, reduce losses associated with the devices and hence the efficiency of converter gets improved along with reduction of converter cost.