Analysis and Design of a Compact Single-Stage AC-DC Resonant Converter with High Power Factor

In this paper, by means of the controller side improvement, the series-parallel resonant converter is combined with a new controller to create a universal single-stage high power factor correction front-end resonant converter. The new controller is a modified version of the self-sustained oscillation with phase shift modulation controller (SSPSM), which allows an active kind control that works for any loading condition with any input voltage. The proposed new control technique allow a great reduction of the regulating frequency range, which offers a significant reduction in the power ratings of the converter filters and components, leading to a compact size power supply. The proposed converter can achieve high power factor and lower voltage stress on the bulk capacitor. The proposed controller allows zero voltage switching (ZVS) at any loading condition with a reasonable power factor that satisfies the IEC 61000-3-2 standards together with a promising efficiency. Analytical, simulation, and experimental results verify the compliance of the converter with the universal AC-DC design standards.