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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Poovannan, E.
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Control & Systems Engineering Electrical & Electronics Engineering

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THD and spectral performance analysis of two-triangle RPWM for inverter applications Jegadeeswari, G.; Sundar, R.; Manikandan, S. P.; Poovannan, E.; Rajarajachozhan, C.; Batumalay, M.; Kalpana, Sukumar
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 1: March 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i1.pp370-382

Abstract

Pulse width modulation (PWM) is essential for voltage source inverters (VSI) to generate high-quality voltage outputs. Conventional deterministic PWM generates predictable harmonics, causing clusters that increase acoustic noise. Random PWM (RPWM) disperses harmonic power over a wider frequency range, reducing noise and electromagnetic interference. Many RPWM techniques improve inverter quality, but only partially suppress dominant harmonics and lack effective harmonic spreading. Most studies focus on simulations with limited FPGA implementation or hardware validation. The use of digital tools like VHDL, ModelSim, and MATLAB co-simulation remains underutilized. This paper proposes two-triangle RPWM strategies to enhance harmonic dispersion and reduce total harmonic distortion (THD). Co-simulation results are shown for both SPWM and RPWM, along with comparisons of fundamental voltages, THD, and HSF across different modulation indexes. Additionally, synthesis data for the Xilinx XC3S500E FPGA processor is supplied. The last section offers a comparative analysis and experimental validation of SPWM and RPWM. These techniques enable enhanced inverter performance, lower acoustic noise, and process innovations in power electronic systems.
Co-Authors Batumalay, M. Jegadeeswari, G. Kalpana, Sukumar Manikandan, S. P. Rajarajachozhan, C. Sundar, R.