Advanced SVPWM Technique for Multilevel Inverter Systems
Received: 21 March 2025 | Revised: 19 April 2025 and 23 April 2025 | Accepted: 27 April 2025 | Online: 4 June 2025
Corresponding author: Shruthi M.
Abstract
A computationally efficient Space Vector Pulse Width Modulation (SVPWM) technique is presented in this paper, especially for the Space Vector Modulation (SVM) of three phase, multilevel H-bridge Inverters (HbIs). The primary objective is to improve voltage waveform quality and significantly reduce Total Harmonic Distortion (THD) without the use of additional filtering components. In contrast to the conventional modulation approaches, the proposed method offers a simplified method to compute dwell times through a sector-based vector segmentation technique that enables precise voltage control at lower switching frequency with a relatively simple system architecture. A key strength of this work lies in its comprehensive validation framework, which includes both MATLAB/Simulink simulations and hardware implementation on the Atmega-328 microcontroller. Thus, the proposed solution is not only possible in theory, but also practical and feasible in the real world. The efficiency of the introduced method is confirmed by the experimental results, where a considerable reduction of THD to 10.4% can be still achieved under a modulation index of 0.9, even better than those of the traditional Sinusoidal Pulse Width Modulation (SPWM) techniques. Moreover, it preserves waveform symmetry and increases the DC bus utilization. This approach provides a scalable and low-complexity solution for medium and high-power inverter applications by removing the need of external harmonic filters and encompassing a structured framework to select optimal modulation indices. The work makes a meaningful contribution to the advancement of SVPWM strategies and lays the foundation for future enhancements in adaptive control and modulation strategies for higher-level inverter systems.
Keywords:
three-level inverter, harmonic reduction, multilevel inverter, total harmonic distortionDownloads
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Copyright (c) 2025 M. Shruthi, Ganesan B. Ezhilarasan, Chandra Shekar S. M.
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