Bidirectional Flyback-push-pull Dc-dc Converter

Abstract

This paper presents a bidirectional flybackpush-pull dc-dc converter. The main characteristics of the proposed converter are galvanic isolation by highfrequency transformers, high efficiency, reduced number of components and low current ripple at both the input and output DC power supplies. The typical applications include isolated bidirectional interface between two low voltage DC buses, where low current ripple is required. The study presents theoretical analysis, design example and experimental data for an 800 W, 80 VDC input, 160 VDC output and 50 kHz of switching frequency, on the laboratory prototype. The measured performance and theoretical predictions were in good agreement.

Unraveling Bidirectional Converter Capabilities: a Didactic Platform for Proving Dual-Direction Operation Based on Current Injection

“…However, their voltage gain is closely tied to the chosen topology. Isolated converters [15]- [17] are the most used in electric vehicles and microgrid applications, it employ galvanic isolation using a high frequency transformer or coupled inductor to ensure the safety of connections between high and low voltage buses. However, these magnetic devices incur energy losses…”