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.

Coupled inductor‐based triple output bi‐polar converter with duty cycle estimation

“…Other papers [6][7][8][9][10] discuss positive triple output converter topologies and their control techniques. Triple output converter with switched capacitor (SC) technique which is discussed in Ye et al 6 increases the size of the capacitor, and the different output voltages are not closely regulated due to the constraints of the configuration.…”

“…Jia and Leung 8 propose a triple output converter with pre‐sub‐period inductor current control where minimal cross‐regulation occurs between two outputs, although it needs a complex digital control algorithm. Triple output converter described in Kim et al 10 has a control based on time sharing duty cycle with fewer switches. It is, however, noted that the switches are subject to a higher voltage stress.…”