A Single-Phase Direct AC Conversion Circuit without DC Link Circuit Tested with Passive Loads
Abstract
This article presents a single-phase AC-AC matrix converter circuit, which directly converts a single-phase utility supply to the loads without a DC link circuit. Such a converter circuit converts fixed amplitude and fixed frequency single-phase AC input into variable amplitude and variable frequency single-phase AC output; both the amplitude and frequency can be adjusted in the form of the SPWM signals that are used to control the bi-directional switches. SPWM signals can be adjusted via the modulation indices from 0-1.0. These results were tested with passive loads via the use of MATLAB/Simulink program. The results were analyzed in terms of the voltage and current waveforms from both the input and output sides, the harmonic analysis and the total harmonic distortion (THD). Simulated results exhibited good agreement with the measured results.
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