Author(s): Soumya S, Dr. B. V. Sumangala
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Vol.2 - Issue 6 (June - 2013)
Abstract: --- Multilevel inverters are gaining importance in high power and high voltage applications due to their superior performance compared to two-level inverters. Among various modulation techniques for a multilevel inverter, the space vector pulsewidth modulation (SVPWM) is widely used. However, the implementation of the SVPWM for a multilevel inverter is complicated. The complexity is due to the difficulty in determining the location of the reference vector, the calculation of on-times, and the determination and selection of switching states. This paper presents the analysis of a three level three- phase inverter using sine pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM). Neutral-point- clamped converters are increasingly applied in industrial drive systems as they allow the use of lower voltage devices in higher voltage applications, provide reduced output voltage total harmonic distortion(THD), and can develop low common mode voltage. Since the proposed multilevel SVPWM method uses two- level modulation to calculate the on-times, the computation of on-times for an n-level inverter becomes easier.Simulation is carried out using matlab/simulink and the simulation results are presented.
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