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Design and Analysis of a Novel Multi-Level Inverter Topology Using DC Sources


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DOI: https://doi.org/10.15866/iree.v18i3.22556

Abstract


Multi-level converter (MLI) topologies are increasingly being used in medium and high-power applications due to their numerous benefits, including lower power loss in power switches, minimal harmonic distortion, and reduced Electromagnetic Interference (EMI) noise in inverters. The objective of this study is to present a new multi-level symmetric inverter topology that can be efficiently controlled. The study aims to identify the positions of different switches in the architecture, select suitable switches, and propose a control technique that can minimize harmonic distortion while generating an ideal output voltage/current. Compared to conventional inverters with the same number of levels, the suggested topology involves fewer switching devices and voltage sources, with minimal voltage drop (Vstress) in the switches and Total Harmonic Distortion (THD). This reduces losses and improves model efficiency. In order to demonstrate the working principle of the new topology, a seven-level single-phase inverter is used, and the topology's study and validation are carried out for different modulation indices in the MATLAB-SIMULINK environment.
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Keywords


Inverter Multi-Level; Approximate Controls; Total Harmonic Distortion (THD); Pulse Width Modulation (PWM)

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