Power quality analysis of 1-phase matrix topology in PWMAC chopper and cycloconverter modes

The matrix converter topology is a versatile one that is capable of functioning as an ac regulator and as a cycloconverter. The topology has been used for ac-ac conversion for various applications that involve variable voltage and variable frequency. Various pulse width modulation (PWM) techniques have been implemented in the 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. 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 and experimental results are presented. 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 of M and variable δ; and vice-versa.