A modulation strategy for matrix converter with extended control range and reduced switching power losses

This paper is focused on the enhancement of the control range of matrix converters (MCs) operating with non-unity input power factor and, at the same time, on the reduction of the switching power losses. The analysis leads to the determination in closed form of a modulation strategy that features a control range, in terms of output voltage and input power factor, that is greater than that of the traditional strategies under the same operating conditions, and a reduction in the switching power losses. The idea behind the improvement of the modulation strategy is that the control system takes advantage of the information provided by the measurement of load currents, which are usually available in electric drives, and uses a quick algorithm to reduce the number of switch commutations. The feasibility of the proposed strategy is verified by computer simulations and experimental tests.