The Use of Power Factor Optimisation to Improve Harmonic Performance of Matrix Converters

Matrix Converter (MC) is a compact and power efficient alternative to the traditional two-step AC/DC/AC conversion. MC typically provides closed-loop control of the output current and unity power factor at the input side. When supplied from a distorted voltage source, it is desirable that MC does not transfer harmonics to the load and does not contribute to the harmonic distortion at the input. However, it has been found that the MC harmonic mitigation and power factor correction are contradictory objectives. This paper presents a detailed study of the dependence of the MC harmonic performance on the input power factor. It optimises the power factor with the view of harmonic minimisation. Simulation results presented in this paper demonstrate the effect of the proposed optimisation. Experimental validation is underway.