SIMULATION AND EXPERIMENTAL COMPARISON BETWEEN MULTILEVEL AND CONVENTIONAL INVERTERS

A. Elnady, and M.S. Suleiman

Keywords

Multilevel inverters, conventional unipolar inverters, output voltageand harmonic content

Abstract

This paper presents a quantitative comparison between the multi- level inverters and conventional inverters. This paper manifests a descriptive comparison between the most widely used type of multi-level inverters and the most common type of conventional inverters is presented for this comparison. The 5-level diode-clamped inverter is considered as a representative for multilevel inverters, and the 2-level unipolar inverter is a candidate for conventional inverters. Aforementioned inverters are compared with each other with respect to some characteristics: the output voltage, controllability of the output and its harmonic content. Simulation results are provided to show and verify the superior performance of the multilevel inverters to conventional inverters for the same operating condition. Moreover, one multilevel inverter and one conventional inverter are built in the laboratory for a rating of 0.5 kVA to Experimentally verify the ļ¬ndings presented by simulation results.

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