Time-Sharing Duty Cycle-Based Concurrent Control for a Triple-Output Converter With Energy Storage

Abstract

This paper presents a new concurrent control structure for a novel non-isolated triple-output converter with energy storage utilizing a time-sharing switching technique. The proposed structure and control feature single-stage power conversion for a DC input, energy storage, and three output ports while reducing the number of switching elements. To employ fewer switches and to have a continuous battery current, a new time-sharing switching method is proposed for two switches in the converter. Based on the proposed control method, the two switches can manage the main inductor current and a battery current concurrently, which in turn creates room to use fewer switching elements. Therefore, the proposed converter structure is compact but fully functional by integrating fundamental converters utilizing the new time-sharing control method. Various applications that have a single DC input and multiple DC outputs along with energy storage can benefit from the proposed structure and control strategies. The fundamentals of the proposed circuits and the concurrent control concept are explained in detail. Then, the feasibility of the proposed approach is validated both by experiments and by simulations.