Efficacy of symmetrical multipulse modulation in the single-phase matrix converter topology

The matrix converter topology is a versatile one that is capable of functioning as an ac regulator and as a cycloconverter. The matrix converter topology has been used for ac-ac conversion for various applications that involve variable voltage and variable frequency. Various pulse width modulation techniques have been implemented in the converter topology to reduce the harmonic distortion and obtain better power quality parameters at the output In this paper the symmetrical multipulse modulation technique (SMM) has been implemented in the single-phase matrix converter and the ability of the converter to deliver variable voltage at a specific fundamental (source) frequency and variable voltage at variable fundamental frequency with the technique has been assessed. The SMM is a simple method that involves two key parameters the number of equal width pulses per half cycle (M) of the supply and the duty cycle of the pulses (δ). The performance of the single-phase matrix converter is assessed for control strategies that involve a fixed value ofM and variable δ; and vice-versa.