Bi-directional Full-bridge DC-DC Converters With Dual-phase-shifting Control and Its Backflow Power Characteristic Analysis

In order to reduce the power circulating flow in bi-directional full-bridge DC-DC converters,this paper analyzed the backflow power characteristic of converter.On this basis,the paper presented a dual-phase-shifting control method.The operation principle of the dual-phase-shifting control and the operation stages of the converter were analyzed in the paper.By establishing mathematical models of transmission power and backflow power,the paper comparatively analyzed control performances of the traditional phase-shifting control and the dual-phase-shifting control.At last,experimental results verify the excellent performance of the dual-phase-shifting control.