LOW COST MATRIX CONVERTER BASED THREE PHASE TO SINGLE PHASE CONVERTER

Abstract

This paper presents a new approach for converting three phase AC power to single phase using a simple circuit topology with bidirectional switches that are triggered by logically generated gating pulses. The phase converter chosen in this work involves single stage power conversion principle and is capable of providing a variable voltage, variable frequency but constant V/F single phase output voltage from available three phase source using Matrix Converter (MC). The proposed circuit topology is capable of operating a single phase AC motor under constant V/F mode eliminating the occurrence of negative sequence currents in the power system network as it tends to create balanced loading of all three phases. The performance of the chosen phase converter is evaluated in MATLAB/SIMULINK environment for different types of load. The real time implementation of MC based phase converter is also carried out using low cost but powerful TMS320F2407 DSP and the experimental results obtained are compared with those obtained through simulation. The results obtained validate the strategy developed. The significant application of this phase conversion technique is simplified feeder mechanism for electric locomotives.