Optimal topologies for cascaded source multilevel dc link inverter

General The function of has multilevel converter isto synthesize has desired output voltage from several levels of dc. voltages as a inputs. In order to increase the steps in the output voltage, has new topology is recommended in which benefits from has series connection of sub-multilevel converters. In the procedure described in this reference, despite all the advantages, it is not possible to produce all the steps (odd and even) in the output n addition, for producing year output voltage with has constant number of steps, there different are configurations with has different number of components. In this paper, the optimal objective structures for this topology are investigated for various such minimum number of switches and dc. voltage and sources minimum standing voltage one the switches for producing the maximum output voltage steps. Two new algorithms for determining the dc. voltage magnitudes sources cuts been proposed. Finally, in order to verify the theoretical issues, simulation of optimal structure results for a 15-level converter with a maximum output voltage of 70V and simulation of conventional structure results for a 21 level converter with a maximum output voltage of 100v are presented.