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Design of a 21-level multilevel inverter with minimum number of devices count
  • Hasan Hatas,
  • Murat Karakılıç,
  • Mehmet ALMALI
Hasan Hatas
Van Yuzuncu Yil University

Corresponding Author:[email protected]

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Murat Karakılıç
Igdir University
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Mehmet ALMALI
Van Yuzuncu Yil University
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Abstract

Multilevel inverters (MLIs) have attracted the attention of researchers for their needs in industrial applications, renewable energy systems, and electric vehicles. MLIs require a large number of power electronic components to synthesize higher levels at the output voltage. However, overuse of power electronic devices increases the complexity, losses, and cost of MLIs. In this study, a new MLI has been proposed with a reduced number of power switches. The basic unit of the proposed MLI comprises only three independent DC sources and ten switches (eight unidirectional, and two bidirectional) to produce 21 levels at the output voltage waveform. The nearest level control (NLC) modulation method has been used to produce gate pulses. Furthermore, three extension topologies have been proposed to generate a higher number of levels and the extension parameters have been compared with recently introduced and conventional topologies. The comparative study shows that the proposed MLI topology requires fewer components in terms of power electronics parameters than the others. On the other hand, the presented first extension study can be used for all non-extendable basic units is one of the prominent values of the study. Simulation studies showing modulation methods, switching patterns, and signal outputs were performed with Matlab/Simulink. A prototype of the proposed main module has been realized and tested in the laboratory with an FPGA processing board. Experimental results have been verified with simulation results, and the performance of the proposed topology has been proven.
13 Feb 2023Submitted to International Journal of Circuit Theory and Applications
13 Feb 2023Submission Checks Completed
13 Feb 2023Assigned to Editor
13 Feb 2023Review(s) Completed, Editorial Evaluation Pending
13 Feb 2023Reviewer(s) Assigned
26 Apr 2023Editorial Decision: Revise Major
17 May 20231st Revision Received
25 May 2023Assigned to Editor
25 May 2023Submission Checks Completed
25 May 2023Review(s) Completed, Editorial Evaluation Pending
25 May 2023Reviewer(s) Assigned
17 Jun 2023Editorial Decision: Revise Minor
22 Jun 20232nd Revision Received
22 Jun 2023Submission Checks Completed
22 Jun 2023Assigned to Editor
22 Jun 2023Review(s) Completed, Editorial Evaluation Pending
23 Jun 2023Editorial Decision: Accept