Multimode space-vector overmodulation technique for enhancing voltage transfer ratio in matrix converters

Abstract

The control method of three-phase matrix converters (MCs) inherently limits the voltage transfer ratio (VTR) to 0.866 in the linear modulation
region, which constrains the broader application of MCs. This paper presents a detailed investigation into a space-vector overmodulation
technique aimed at enhancing the VTR of MCs. The proposed method integrates the principles of inscribed circle and hexagon vectors, as
well as hexagon and basic vectors, to extend the modulation range. Explicit equations for calculating the duty ratios of active and zero vectors
are derived to achieve improved VTR. The effectiveness of the approach is validated through simulation results, demonstrating accurate
output voltage fundamental components.