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Performance Improvement of Phase Displacement Modulated Inverter

Md. Imran Azim 1 and Md. Fayzur Rahman 2
1. Department of Electrical & Electronic Engineering, Rajshahi University of Engineering & Technology (RUET), Rajshahi, Bangladesh
2. Department of Electronics & Telecommunication Engineering, Daffodil International University (DIU), Dhaka, Bangladesh
Abstract—This paper demonstrates an approach to minimize the harmonics contained in the output of a single phase full bridge inverter modulated by phase displacement control so as to improve the Total Harmonic Distortion (THD). With a view to reducing harmonics an LC low pass filter is used which blocks the harmonics and undeniably passes almost sinusoidal output at the output terminal and it is certainly true that THD has been improved to a great extent. An illustration of Fourier Transform has been provided in this paper in order to perceive both the fundamental and harmonics component precisely. It has been found from simulation that the Total Harmonic Distortion (THD) before and after the application of LC low pass filter is 33.34% and 0.003% respectively. That is why this LC low pass filter is quite effective to reduce THD of a 1-phase full bridge inverter.

Index Terms—single phase full bridge inverter, IGBT, Phase displacement control, harmonics analysis, FFT, THD, LC low pass filter, MATLAB simulation.

Cite: Md. Imran Azim and Md. Fayzur Rahman, "Performance Improvement of Phase Displacement Modulated Inverter," International Journal of Electrical Energy, Vol. 1, No. 4, pp. 300-303, December 2013. doi: 10.12720/ijoee.1.4.300-303
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