Improvement of waveform for high frequency AC-linked matrix converter with SVM based on virtual indirect control

This paper proposes a dead-time compensation for a secondary side matrix converter with space vector modulation in order to improve waveform of the high frequency AC-linked matrix converter. The proposed system is constructed by back-to-back configuration of two three-phase to single phase matrix converters and a high frequency transformer. In order to improve the waveform, the dead-time compensation for the primary side matrix converter has been proposed. However, the dead-time compensation for the secondary side matrix converter with space vector modulation based on virtual indirect control has not been discussed. In this paper, the dead-time compensation method for the secondary side matrix converter is revealed. As the result, it is confirmed that the average output voltage error between the command and measured voltage is reduced by 20% at low modulation index by adopting the dead-time compensation. Finally, a 2-kW prototype is demonstrated by experiment. The efficiency and the input power factor at the maximum point were obtained by 91.4% and 0.997. Moreover, the input current total harmonic distortion (THD) is 5.65% at 2-kW output power.