A new modulation method for matrix converters

This paper presents a new modulation method for matrix converters based on the indirect modulation model. During the switching period, the proposed modulation method uses a combination of only one active vector and a zero vector in the inversion stage to achieve minimum flux error, while in the rectification stage a single current vector is selected, according to the error of the input current vector angle. This reduces the number of switching sequences in the switching period, improving the accuracy of generating the output voltage vector especially in the low modulation index range. Supplementary, the direct control of the input current vector is implemented. The estimation of the angle of the input current vector is done by applying the inverse transformation, that corresponds to the applied active vector, to the output currents.