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Multilevel technology permits the achievement of high power ratings with voltage limited devices. Voltage source multilevel inverter has become more and more popular, thanks to their capability to meet the increasing demand of power ratings and power quality associated with reduced harmonic distortion and lower electromagnetic interference. Pulse width modulation based on space vectors (SVPWM) technique has become the most popular and important PWM technique for three phase voltage source inverter. The dwell time of the neighbouring voltage space vectors in SVPWM is considered according to volt-second balancing principle. Three switching points are obtained from the dwell times. According to the compared results and location of the triangle, that the reference vector falls in the switching sequence can be changed. The corresponding simulation model is build using Matlab/Simulink and the simulation result shows the correctness and feasibility of the algorithm.
Date of Conference: 1-3 Dec. 2011