Asymmetrical eleven-level inverter topology with reduced powersemiconductor switches, total standing voltage and cost factor

Voltage source multilevel inverters (MLI) is widely utilized in medium and high-powerapplications due to their advantages. Here, an 11-level, asymmetrical multilevel invertertopology is proposed. The topology utilizes four unidirectional switches, three bidirec-tional switches along with two dc sources. The proposed configuration of switches andthe concept of the dc-link capacitor is utilized to generate eleven level output voltage.The reduced number of components such as power switches and DC sources, lower con-trol complexity due to capacitors’ self-balancing nature, and low total standing voltage(TSV) are the critical features of the proposed topology. Moreover, a reliability assess-ment of the topology shows that the topology has a high mean time to fault (MTTF),which makes it robust and reliable. Matlab/Simulink environment is used to develop asimulation model of the proposed topology, while PLECS is used for the thermal mod-elling and analysis of the converter. A prototype is developed and tested in the labora-tory to validate the performance for different loading conditions. The proposed topol-ogy can be cascaded to produce the ‘n’ number of levels. The critical comparison of theproposed topology shows that the proposed circuit has advantages over other comparedtopologies.     «

Voltage source multilevel inverters (MLI) is widely utilized in medium and high-powerapplications due to their advantages. Here, an 11-level, asymmetrical multilevel invertertopology is proposed. The topology utilizes four unidirectional switches, three bidirec-tional switches along with two dc sources. The proposed configuration of switches andthe concept of the dc-link capacitor is utilized to generate eleven level output voltage.The reduced number of components such as power switches and DC s...     »