Two simple overmodulation algorithms for space vector modulated three-phase to three-phase matrix converter

摘要

In this study, the potential of the space vector modulation (SVM) to control the matrix converter beyond its intrinsic voltage transfer ratio (VTR) limitation (0.866) is investigated. Afterwards, a simple space vector overmodulation method to increase the VTR of matrix converter is proposed. Depending on the desired VTR, the method is divided into two modes. In the first mode, besides improving the VTR, the quality of the reference quantities is of main concern. In the second mode, the main goal is to reach the maximum achievable VTR at the expense of increased harmonic ripples in the converter waveforms. It is demonstrated that the maximum achievable VTR in both modes depends on the ratio of the desired output frequency to the input frequency. Experimental results confirm the feasibility and appropriate performance of the proposed method.