Abstract
A multilevel inverter is implemented for generating the required staircase AC voltage of output from various steps of voltages of DC sources. The multilevel inverter gives a better harmonic spectrum and a compatible quality of output. This article delves into an analytical analysis of the total harmonic distortion (THD) of different multilevel inverters which employ a multicarrier PWM technique. This technique is implemented for operating the switches at their respective angle of conduction. This paper deals with various cascaded H-Bridge multilevel inverters (CMI) with various loads that are modelled by implementing the MATLAB/Simulink platform. The output gives a better result of the proposed model in terms that it is helpful towards reducing the THD and the losses of switching.
Highlights
The multilevel inverter can be categorized as a power semiconductor device along various sources of dc voltage
4.1 Phase – Shifted pulse width modulation (PWM) Technique In this method, the triangular waves will be phase displaced by a certain phase angle Φ1 between the adjacent triangular waves
This paper focuses on seven, nine, and eleven-level multilevel inverters, in addition to three and five-level multilevel inverters with different loads
Summary
The multilevel inverter can be categorized as a power semiconductor device along various sources of dc voltage. Those sources may be a solar cell, fuel cell or a battery. There are various advantages of the multilevel inverter in comparison with the two-level inverter It can operate over a wider range of switching frequencies. It draws the output current of a lower THD and generates the output voltage of a lower harmonic content. It has certain demerits that by increasing various switching devices, increase the requirements of gate drive circuits. Such system configurations become complex and by default, there is an increase in the cost of devices
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