Implementation Of A Simplified Nine Level Dc-Ac Inverter

Document Type : Primary Research paper


1 Assisant Professor, Academy of Maritime Education and Training, Chennai-603112,India

2 Professor, Jeppiaar Engineering College, Chennai – 600 119, India

3 Assistant Professor, Arupadai Veedu Institute of Technology,Chennai-603104,India


In recent years, cascaded Hi-Bridge multilevel inverter is preferred many of ithe industrial applications. Cascaded H-bridge iMultilevel Inverter know-hows became an incredibly is the important optimal medium voltage and high power control. In the conventional system, seven levels AC output voltage is obtained by using eight switches with appropriate gate signal design. The conventional system is controlled by the iSinusoidal Pulse Width Modulation (SPWM) technique. The projected imultilevel inverter produces Nine level alternating current output voltage with reduced number of switches. The control technique used here is iSinusoidal Pulse Width Modulation (SPWM) technique by TMS320LF2407i digital signal processor (DSP). The main advantage of this technique is reduced harmonic distortion, reduced number of switching power devices and decreased switchingi losses. The projected system voltage stress are reduced. The conventional multilevel inverter (MLI) and proposed Modified Cascaded Hi Bridge Multi Level Inverter (MCHBMLI) are simulated to compare their Total Harmonic Distortion. To conclude, a iLaboratory prototype multilevel iinverter has output voltage of 220v/2 KW with 400v input voltage is realized. Investigational results display the efficacy at full load is 94.6% and the efficacy at the maximum s 96.9%.