Design of a 31-Level Single-Phase Voltage-source Inverter Producing almost Sinusoidal Voltage Waveform

Abdulkareem Mokif Obais
Professor at Department of Electrical Eng, College of Engineering, University of Babylon

Abstract
In this paper a single-phase voltage-source inverter of 31 non-zero levels is designed. These levels follow a sinusoidal path and are constructed by using only five dc voltage sources instead of thirty-one as traditionally employed in multilevel technology of voltage-source inverters. Consequently, the total numbers of switching devices and electronic circuitries are largely reduced. The output voltage of this inverter has sinusoidal form and is almost free from harmonics associating conventional types of inverters. No type of conventional Pulse-Width-Modulation is introduced here and the technique is applicable for both resistive and inductive loads. The complete system was designed and implemented on Pspice.