Application of Improved Indirect Matrix Converter in Multipower Supply System for Driving Multiple Loads Independently

Abstract

The application of improved indirect matrix converter (IMC) in multipower supply system for driving multiple AC loads (static and/or dynamic) independently with single AC supply. The topology presented is on the conventional indirect matrix converter with improved control strategies at both input and output stages. The input stage of improved IMC uses largest positive line-to-line voltage at each instant to produce low ripple, maximum DC voltage and hence to reduce the switching losses and the IMC output voltage distortions compared to conventional IMC. Also, for all operating methods of the improved indirect matrix converter, the input fundamental current is maintained at unity power factor. One of the major advantages of IMC with fixed input voltage and frequency is to drive variable loads at different frequencies and different voltages, at the output stages. In this paper, the performance of improved IMC with two output stages, where output stage-2 is supplying power to static load at 45 Hz and output stage-1 is fed to (i) static load at 60 Hz and (ii) squirrel cage induction motor (SCIM) for speed control using V/f control technique, is analysed. The hardware setup is implemented in laboratory for the proposed IMC and a comparison is made for the experimental results with the simulation results.

Appendices

Appendices

Output LC filter parameters: L = 5 mH, C = 4 μF; Machine parameters: R_s = 1.85 Ω; R_r = 3 Ω; $L_{{{\text{ls}}}}$ = 0.01H; $L_{{{\text{lr}}}}$ = 0.01H; L_m = 0.16 H; 4 poles.