Various Control Methods by conduction ratio to a Middle Phase in Matrix Converter Based on Direct AC/AC Conversion

A matrix converter is a power converter with some merits compared with a conventional rectifier/ inverter system. During past two decades, the matrix converter has been discussing caused by its attractive features such as sinusoidal input current waveform, size reduction, and realization of high efficiency by using a novel IGBT with reverse blocking, etc. Therefore, the matrix converter has been widely researched until today. This paper describes three control schemes of the matrix converter based on direct AC/AC conversion control. Two methods are conventional control scheme. Another is a proposal control scheme of the matrix converter. The proposed method is carried out enlarging output voltage of the matrix converter without input current harmonics raise. As a result, the effectiveness of the proposed method is shown by simulation and experimental results.