Page 52 - IJEEE-2022-Vol18-ISSUE-1

Received: 04 December 2021 Revised: 11 January 2022 Accepted: 11 January 2022
DOI: 10.37917/ijeee.18.1.6
Vol. 18| Issue 1| June 2022
? Open Access

Iraqi Journal for Electrical and Electronic Engineering

Original Article

Comparison of New Multilevel Inverter Topology with
Conventional Topologies Used for Induction Heating

System

Aws H. Al-Jrew*1,2, Jawad R. Mahmood1 and Ramzy S. Ali1

1 Electrical Engineering Department, University of Basrah, Basrah, Iraq
2Electronic and Communications Engineering Department, Al Muthanna University, Muthanna, Iraq

Correspondence
*Aws H. Al-Jrew
Electronic and Communications Engineering
Department, Al Muthanna University, Muthanna, Iraq
Email: aws.hashim@mu.edu.iq

Abstract
In this article, a comparison of innovative multilevel inverter topology with standard topologies has been conducted. The

proposed single phase five level inverter topology has been used for induction heating system. This suggested design generates
five voltage levels with a fewer number of power switches. This reduction in number of switches decreases the switching losses
and the number of driving circuits and reduce the complexity of control circuit. It also reduces the cost and size for the filter
used. Analysis and comparison has been done among the conventional topologies (neutral clamped and cascade H-bridge
multilevel inverters) with the proposed inverter topology. The analysis includes the total harmonic distortion THD, efficiency
and overall performance of the inverter systems. The simulation and analysis have been done using MATLAB/ SIMULINK.
The results show good performance for the proposed topology in comparison with the conventional topologies.

KEYWORDS: Multilevel inverter (MLI), Total Harmonic Distortion (THD), Pulse Width Modulation (PWM), Induction Heating (IH).

I. INTRODUCTION single DC source and numerous single phase transformers to
create three levels using two switches as compared with
Multilevel inverter MLI is a power electronic converter conventional one which requires four switches, and all
device used to generate high number of voltage levels. It’s transformers need just two switches to change the direction
used in medium and high voltage application [1]. of a single DC source. The experimental results
The significance of multilevel inverters is associated with demonstrated that the suggested architecture can provide
their power quality, harmonic amplitude reduction, and high quality output voltages, but the primary drawback of
capability to generate as near to a sine wave output voltage that topology was the need of switches with high current
as possible. rating than traditional topology. Despite the fact that the
usage of transformers make the inverters design more
Because of their ability to provide a high quality voltage complex and expense [5].
waveform and reduced current and voltage rating of the used
switches, multilevel inverter topologies have seen significant Another cascade multi-level inverter proposed in [6]. That
growth in industrial applications in recent years [2].The inverter composed of series connection of cells (each cell
primary types of multilevel inverters are diode or neutral consist of 3 DC voltage sources and 5 switches) which
clamped point multi-level inverter, cascaded H-bridge produced positive levels and full bridge was included to
multilevel inverter and flying capacitor multilevel inverter produce negative output levels. Four distinct algorithms had
[3]. been presented to identify the magnitude of DC sources in
order to produce all voltage levels (even and odd) at the
New inverter topologies have been proposed by many output of the proposed topology. That inverter topology
researches that aim to improve the quality of the energy required fewer power electronic equipment, resulting in less
available at the inverter terminals [4]. cost of the inverter. The experimental findings were
validated using 15-level inverter. The major drawback of that
In (2012) M. R. Banaei, H. Khounjahan, and E. Salary
introduced multilevel inverter topology which was the
cascaded transformer inverter. That topology consisted of

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and
reproduction in any medium, provided the original work is properly cited.
© 2021 The Authors. Iraqi Journal for Electrical and Electronic Engineering by College of Engineering, University of Basrah.

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