Design and Validation of a Single Phase Multilevel Inverter Utilizing Reduced Switches Number

• Published in: 2018 Twentieth International Middle East Power Systems Conference (MEPCON) pp. 974 - 979
• Main Authors: Ali, Ahmed I. M., Mohamed, Essam E. M., Sayed, Mahmoud A., Saeed, Mahmoud S. R., Azmy, Ahmed M.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-12-2018
• Subjects: Inverters; Multilevel inverters; PI control; Pulse width modulation; PWM; Switches; THD; Voltage control; Voltage regulation
• ISBN: 9781538666524; 1538666529
• DOI: 10.1109/MEPCON.2018.8635118

Multilevel-inverters (MLI) usage has been spread, recently, due to their convenience over the conventional one. This paper suggests a single phase 5-level pulse-width modulated (PWM) inverter for load voltage regulation. The presented MLI uses a PWM technique and hence some power switches are controlled at the line frequency, while the others are switched at the switching frequency. The MLI synthesizes the five-level output voltage at a less number of switches and low harmonic contents compared with the conventional inverters. The mathematical model and the operational modes are presented. For closed-loop load voltage regulation, a PI controller is required to control sinusoidal load voltage. MLI validity has been investigated experimentally by using a laboratory-prototype controlled with dSPACE DS-1103.