X-type step-up multi-level inverter with reduced component count based on switched-capacitor concept
Erfan Azimi (Babol Noshirvani University of Technology)
Aryorad Khodaparast (Babol Noshirvani University of Technology)
Mohammad Javad Rostami (Babol Noshirvani University of Technology)
Jafar Adabi (Babol Noshirvani University of Technology)
M. Ebrahim Ebrahim Adabi (TU Delft - Intelligent Electrical Power Grids)
Mohammad Rezanejad (University of Mazandaran)
Eduardo M. G. Rodrigues (ESAN)
Edris Pouresmaeil (Aalto University)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
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.
help_outline