Design and Implementation of 15-Level Multilevel Cascaded Type Inverter with Reduced Switching Count

Abstract

In high and medium AC power applications, multilevel inverters (MLI) have significant importance in modern days. The architecture of multi-level cascaded type inverter is preferred because of reduced harmonic distortion, high quality AC output power, least switching loss and minimum switching stress. The existing method uses 8-number of switches to generate 11-level AC voltage. A new design of 15-level multilevel inverter with 6-switching devices is proposed in this paper and DC supply devices are similar to existing method, which outcomes in less switching loss, less complexity of circuit design and less cost. The DC supply for multilevel inverter is taken from solar panel with MPPT technique. The new 6-switch multilevel inverter circuit topology, switching pattern and gate pulse making is explained in this paper. The fast Fourier transform (FFT) analysis of the outputs of 11-level and 15-level of multilevel inverters are related. The new 6-switch 15 level cascaded type inverter circuit has been intended and modeled by using MATLAB software Simulink tool. The simulation outcomes are displayed with less total harmonic distortion and reduced switching loss has been achieved.