Multilevel Inverter: A Review on Methodology, Topologies & Techniques
DOI:
https://doi.org/10.18486/ijcsnt/6.1.076Keywords:
Multi-level Inverters, MLI, Asymmetric and Symmetric Voltage Source Configuration, Hybrid Topologies, CHB, THD, Phase Opposition Disposition, Sinusoidal Pulse Width Modulation, PWM, Phase Shift Pulse Width ModulationAbstract
In Power-Electronic Systems, Multi-Level Inverters are growing as new topologies which propose options for high voltage and medium voltage. From different levels of DC voltage source, a Multi-Level Inverter (MLI) generates the characteristic staircase voltage wave, where this DC voltage source comes from various renewable energy sources like fuel cell, solar cell, etc. Because of the gate driver circuit, the complexity of the system is higher which results in the major drawback of the Multi-Level Inverter. This paper discusses the Multi-Level Inverter methodology and various topologies like (1) Diode-clamped, (2) Flying-capacitor and (3) Cascaded Multi-Level Inverters with separate DC sources. Various types of switching schemes used in Multi-Level Inverter topologies like the Pulse Width Modulation (PWM) scheme have also been discussed in this paper.
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