Carrier Based SVPWM Method for Multi-Level System with Reduced HDF

Abstract

In most inverterkonverter applications SVPWM method is the preferred approach, for it shows good characteristics in linear modulation range and waveform quality. In this paper, we propose a new carrier based SVPWM method for multi-level system. First, we survey the conventional carrier based SWWM method, and investigate the problem of the conventional one for the multi-level system with the focus on the switching frequency harmonic flus trajectories. Finally, we propose a new carrier based SVPWM method that can reduce harmonic distortion. Simulation and experimental results are given for the verification of the proposed SVPWM method. I. Ih'TRODUCrlON