Single-Phase Five-Level Multilevel Inverter Based on a Transistors Six-Pack Module

Abstract

This article introduces a single-phase five-level multilevel inverter based on six switches and two transformers. The proposed converter requires a single dc input source with low voltage. The disposition of switches makes it possible to build the converter with a transistors six-pack module off-the-shelves, traditionally used to build three-phase inverters, which simplifies the manufacturing process. The converter increases the voltage with two transformers; for that reason, it does not require an auxiliary step-up converter. The use of transformers (with the transformer’s turns ratio) allows for using the same topology for several input voltage levels. To verify the operation of the proposed multilevel inverter, a computer-based simulation was performed with PSIM, a software that considers parasitic components. The results show that the proposed converter can work properly.

Optimization of the Voltage Total Harmonic Distortion in Multilevel Inverters by Using the Taguchi Method

“…Multilevel inverter (MLI) topologies are interesting for several applications, ranging from medium-and high-power levels, because of their improved efficiency and quality of the output voltage compared to typical two-level inverters [1][2][3]. The three basic MLI topologies presented in the literature are the "flying capacitor multilevel inverter", "diode clamped multilevel inverter", and "cascaded H-bridge multilevel inverter" (CHBMLI).…”