Experimental comparison between direct matrix converter and indirect matrix converter based on efficiency

Abstract

This paper presents an experimental efficiency comparison study between two different AC-AC converter prototypes: the direct matrix converter (DMC) and indirect matrix converter (IMC). The evaluation is performed under different load conditions and using discrete IGBTs at a power level up to 9k[W]. The losses measurement is carried out by means of two power analyzers: one placed at the input and one at the output of the converters; to facilitate this measurement set-up the inclusion of an output filter was necessary in addition to the required input filter. Both converters implement the same traditional symmetrical space vector modulation and feature the same input/output filters design.