Low Cost Practical Implementation of a Three-Phase Matrix Converter

The research of more efficient power ac-ac converters, such as the matrix converter, a topology that reduces the losses of enegy convertion due to a single stage conversion, provides bi-directional power flow, sine wave in and out, variable power factor both input and output, is obstructed by difficulties of building, replacement of damaged devices and electromagnetic interference (EMI) on an experimental prototype. The trend is given by manufacturing more efficient and smaller converters, where to achieve these objectives it is necessary to experiment with the use of new semiconductor devices and new switching strategies. On the other side, for the manufacture of low-cost converters, it is necessary to make use of cheaper devices and therefore less efficient. This paper reports the development and implementation of a compact and easy-replacement matrix converter, built in four parts: power modules with bi-directional switches, control system, measure system and filtering, in order to facilitate the replacement of damaged devices and reduce electromagnetic interference problems.