A Phase-Shifted Gating Technique With Simplified Current Sensing for the Semi-Bridgeless AC–DC Converter

In this paper, a phase-shifted semi-bridgeless boost power-factor-corrected (PFC) converter is proposed to simplify the current-sensing technique for the semi-bridgeless PFC converter. The converter features high efficiency at light loads and low ac input lines, which is critical to minimize the charger size, charging time, and amount and cost of electricity drawn from the utility. The converter is applicable for automotive levels I and II but is ideally suited for level-I residential charging applications. A detailed converter description and steady-state operation analysis of this converter is presented. Experimental results of a prototype boost converter, converting the universal ac input voltage to 400 V dc at 3.4 kW, are given, and the results are compared with an interleaved boost converter to verify the proof of concept and the reported analytical work.