Development of simple multilevel inverter using voltage regulator IC

Abstract

This paper presents the development of a simple 5- level multilevel inverter for low power applications that not exceeding 30W using the common LM350 voltage regulator IC. A microcontroller with dedicated program is used to control on the biasing resistance of the IC and H-bridge inverter in order to produce the quasi-sinewave looking waveform. Analysis of the output results are shown with levels of percentage harmonics. The development of this multilevel inverter serves as a new concept of study for multilevel inverters considering its simplicity and low cost.