Design and Analysis of a Robust High-Density Single-Phase Isolated Buck Converter System For Regulated Power Supply

Abstract

This paper proposes and delivers the performances and results of a simulated prototype of the single-phase isolated buck power converter system by extracting and transmitting the oscillating ripple energy of the primary buck inductor current to the secondary coil. This topology is an alteration on the conventional buck configuration in which the power inductor is changed with a coupled inductor to build an isolated secondary output. On inserting a coupled inductor in place of the power inductor of the buck converter, the secondary coil can deliver the required power due to the time-varying magnetic field developed by the oscillating part of the primary inductive current. Hence it eradicates the requirement of transmitter side in an inductively coupled power transfer technology and results in a DC-DC switching converter, including a primary coil besides the existing typical wired output of the buck converter. This paper addresses the relevant operating principle and offers results for the simulation prototype by using a single-phase isolated buck structure, which attains simultaneous Buck conversion of conventional output and delivers the power to the secondary load as well. Keywords-single-phase isolated buck power converter, regulated power supply, dc-dc converter, switching, charging