Abstract
Switching Capacitor based Multi-Step Inverter (MSI) gains more importance among researchers because of its boosting capability. Moreover, the switching capacitors have self-balancing competency. The major issue of those configurations is it charging methodology. The Capacitors are charged by pulsed currents which limits their application. This paper introduces a soft switching based single phase single-source, 7-Step (1S-7S) Multi-Step Boost Inverter (MSBI) to address the challenge of charging with better applicability. The proposed 1S-7S MSBI has abated number of power devices and is proficient of producing load voltage with a voltage amplification ratio of three. The Switching Capacitor is charged via an inductor, which limits the pulsed current charging and makes the capacitor to charge faster. This method of charging the switching capacitor increases the lifespan of the capacitor. The proposed topology is validated across various reference signals and load conditions in both simulation and in laboratory settings. The simulation is performed using MATLAB/SIMULINK. A 500VA, 100V dc input inverter is built in the laboratory to validate the inverter performance practically. The experimental results demonstrate that the proposed configuration’s viability and reliability of MSI systems. The output voltage and current THD is 15.01% and 2.52% for the simulation and 17.28 % and 3.89 % for the experimental results. A comparison with existing topologies clearly highlights the advantages of the proposed inverter.
DOI: 10.61416/ceai.v27i4.9765