A Novel Single Phase Low Frequency Switching Based Multilevel Inverter with Reduced Device Count


Karakılıç M., Almalı M. N., Hataş H.

1ST INTERNATIONAL CONFERENCE ON SCIENTIFIC AND ACADEMIC RESEARCH, Konya, Turkey, 10 - 13 December 2022, pp.370

  • Publication Type: Conference Paper / Summary Text
  • City: Konya
  • Country: Turkey
  • Page Numbers: pp.370
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

Multilevel inverters have gained the attention of researchers for the need to use them in industrial applications, renewable energy systems, and electric vehicle drivers. However, there have always been needed topologies that use fewer switches for a higher number of levels in terms of power losses and gain. In this study, a new single-stage multilevel inverter with minimum number of switches has been proposed to synthesize higher voltage levels at the output. The basic unit of the proposed multilevel inverter comprises three sources and twelve switches (ten of these are unidirectional and two are bidirectional) and produces 21 levels at the output. An extension topology has been proposed for the higher number of levels. The proposed extension topology has been compared with their recent and conventional counterparts and the comparison results show that the proposed module requires fewer power electronic components than others. Simulation work that exhibits modulation methods, switching patterns, and signal scopes also have been carried out with Matlab/Simulink. Nearest level control modulation method has been used to produce gate pulses for the switches to obtain a sinusoidal-like output voltage waveform. With the proposed 21- level topology, the output waveform THD value is obtained as 4% without filter.