Abstract

This paper presents the analysis of a single-phase bridgeless SEPIC rectifier operating in discontinuous conduction mode with two different modulation techniques. The rectifier operates with high power factor and output voltage control. This rectifier topology has the advantage of providing high power factor with low input filtering effort, as Boost rectifiers. The disadvantage is the increasing of component count. To develop this study, this paper shows the theoretical analysis of the converter with each modulation technique, followed by design equations. Experimental results from the single-phase rectifier with 220 V input voltage, 200 V output voltage, 50 kHz switching frequency and 500 W output power are presented. Finally, a comparative analysis of the performance of each modulation in terms of efficiency and total harmonic distortion of the input current is stated.

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