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

This paper proposes a single-phase isolated buck power converter system that extracts and transmits the oscillating ripple energy of the primary buck inductor current to the secondary coil. This topology is a modification of the conventional buck configuration in which the single power inductor is substituted for by a pair of coupled inductors to build an isolated secondary output. The secondary coil delivers 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 setting up a separate DC regulated supply for the main switch of the buck converter 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.