Single phase Cascaded H-Bridge Multilevel Inverter Topology

The concept of multilevel power electronic converters is introduced and later widely accepted for medium and high power applications. The numerous multilevel converter topologies are being used as a power converter in various existing applications. Among the widely accepted conventional topologies, the Cascaded H-bridge (CHB) multilevel inverter is investigated in this paper. The CHB inverter with equal as well as unequal DC sources is studied in detailed manner; and the comparative analysis is done for the same. The MATLAB simulation results for CHB multilevel inverter with equal DC sources are presented. The in-phase Sinusoidal Pulse Width Modulation (SPWM) methodology is considered here as a control technique.