Simple soft‐switched phase‐shifted FB converter for reduced voltage stress and negligible duty cycle loss

Abstract

A simple modified configuration of the conventional phase-shifted full-bridge (C-PSFB) converter, phase-shifted FB converter without filter inductor (PSFB-w/o-L) is proposed in this study in order to reduce the peak voltage stress on the rectifier diodes. As the proposed configuration is devoid of filter inductor, it features lighter weight and low cost. As the proposed configuration is achieved eliminating the filter inductor, the maximum voltage that comes across the rectifier diode is limited to the output voltage, thus eliminating the need for snubber circuit. Additionally, the proposed PSFB-w/o-L has the advantage of negligible duty cycle loss. A comprehensive analysis on the mechanism of the peak voltage problem across the rectifier diode in the C-PSFB is addressed and the way it is eliminated in the proposed PSFB-w/o-L is described. The detailed analysis of the operation and design consideration of the proposed PSFB-w/o-L is presented. Simulation and experimental results are presented to verify the analysis.

Design and implementation of bi-directional converter with internet of things control based reading

“…Hence, it is important to have high-performance for the converters, transformers, and rechargeable batteries [4]. Thus, a precise management of power system is one of the most crucial demands for stable and efficient operation of the control systems [5]. There is a wide variety of the DC-DC converters such as buck, boost, or buck/boost converters [6].…”

Secondary‐side phase‐shifted full‐bridge converter with reset winding

“…As one of the mainstream topologies of isolated DC/DC circuits, the traditional PPS‐FBC has the characteristics of high efficiency, high power density and high reliability [4–6]. Utilising the transformer leakage inductance and switch intrinsic capacitance, it can achieve ZVS without any external passive components [7–10]. PPS‐FBC has been widely used in medium and high power applications [11–14], but there are some major problems: (i) limited ZVS range of the lagging‐leg switches; (ii) the circulating energy issue; (iii) the voltage spike of the output rectifiers; (iv) the severe loss of duty cycle.…”