X-Type Step-Up Multi-Level Inverter with Reduced Component Count Based on Switched-Capacitor Concept

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-12
Major/Subject
Mcode
Degree programme
Language
en
Pages
18
1987-2004
Series
Electronics, Volume 9, issue 12
Abstract
This paper aims to present a novel switched-capacitor multi-level inverter. The presented structure generates a staircase near sinusoidal AC voltage by using a single DC source and a few capacitors to step-up the input voltage. The nearest level control (NLC) strategy is used to control the operation of the converter. These switching states are designed in a way that they always ensure the self-voltage balancing of the capacitors. Low switching frequency, simple control, and inherent bipolar output are some of the advantages of the presented inverter. Compared to other existing topologies, the structure requires fewer circuit elements. Bi-directional power flow ability of the proposed topology, facilitates the operation of the circuit under wide range of load behaviors which makes it applicable in most industries. Besides, a 13-level laboratory prototype is implemented to realize and affirm the efficacy of the MATLAB Simulink model under different load conditions. The simulation and experimental results accredit the appropriate performance of the converter. Finally, a theoretical efficiency of 92.73% is reached.
Description
Keywords
Multi-level inverter, Self-balance, Single source, Bidirectional, Switched capacitor
Other note
Citation
Azimi , E , Khodaparast , A , Rostami , M J , Adabi , J , Adabi , M E , Rezanejad , M , Rodrigues , E M G & Pouresmaeil , E 2020 , ' X-Type Step-Up Multi-Level Inverter with Reduced Component Count Based on Switched-Capacitor Concept ' , Electronics , vol. 9 , no. 12 , 1987 , pp. 1-18 . https://doi.org/10.3390/electronics9121987