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In this paper a three-level single-stage power-factor-corrected ac/dc converter is presented. The proposed circuit integrates the operation of the boost power factor correction and the three-level dc/dc converter, and mitigates the drawbacks found in previously proposed two-level single-stage voltage-fed converters. In the paper, the operation of the new converter is explained in detail, its steady-state...
An AC-DC single stage voltage-fed PWM full-bridge converter is proposed in the paper. The converter can simultaneously perform input power factor correction and DC-DC conversion using conventional phase-shift PWM and can maintain a primary side DC bus voltage of less than 450 V even at a high input line voltage of 265 V. This is a combination of features that few if any other converters of the same...
This paper presents a new design for bridge-type AC/DC converters with natural input current shaper. They have a fast output voltage regulation in full range input (85V~265 V/AC). An additional winding in main transformer can naturally modify a line current. Further, the additional winding reduces an input inductance, so the weight and size of magnetic material are significantly reduced. The total...
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