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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Ahmad Nizammuddin Muhammad Mustafa
Universiti Teknikal Malaysia Melaka
Control & Systems Engineering Electrical & Electronics Engineering

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Hardware implementation of single phase three-level cascaded h-bridge multilevel inverter using sinusoidal pulse width modulation A. Shamsul Rahimi A. Subki; Mohd Zaidi Mohd Tumari; Wan Norhisyam Abd Rashid; Aiman Zakwan Jidin; Ahmad Nizammuddin Muhammad Mustafa
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 2: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.936 KB) | DOI: 10.11591/ijpeds.v10.i2.pp625-635

Abstract

In this paper a hardware implementation of single-phase cascaded H-bridge three level multilevel inverter (MLI) using sinusoidal pulse width modulation (SPWM) is presented. There are a few interesting features of using this configuration, where less component count, less switching losses, and improved output voltage/current waveform. The output of power inverter consists of three form, that is, square wave, modified square wave and pure sine wave. The pure sine wave and modified square wave are more expensive than square wave. The focus paper is to generate a PWM signal which control the switching of MOSFET power semiconductor. The sine wave can be created by using the concept of Schmitt-Trigger oscillator and low-pass filter topology followed by half of the waveform will be eliminated by using the circuit of precision half-wave rectifier. Waveform was inverted with 180º by circuit of inverting op-amp amplifier in order to compare saw-tooth waveform. Two of PWM signal were produced by circuit of PWM and used digital inverter to invert the two PWM signal before this PWM signal will be passed to 2 MOSFET driver and a 3-level output waveform with 45 Hz was produced. As a conclusion, a 3-level output waveform is produced with output voltage and current recorded at 22.5 Vrms and 4.5 Arms. The value of measured resistance is 0.015 Ω that cause voltage drop around 0.043 V. Based on the result obtained, the power for designed inverter is around 100W and efficiency recorded at 75%.
Co-Authors A. Shamsul Rahimi A. Subki Aiman Zakwan Jidin Mohd Zaidi Mohd Tumari Wan Norhisyam Abd Rashid