Event-Triggered MPC for Current-Source-Mode Single-Inductor Multiple-Port DC-DC Converter

Abstract

To solve the problem that the computational complexity of the current-source-mode (CSM) single-inductor multiple-output (SIMO) dc-dc converter increasing exponentially with the number of switches under finite control set model predictive control (FCS-MPC), in this paper, we combine the traditional MPC and event-triggered (ET) control strategy, i.e., event-triggered model predictive control (ET-MPC). The ET-MPC inherits the characteristics of fast dynamic response and multi-objective optimization of MPC. Additionally, the method detects the system data and calculates state errors in real time. Only when the state error exceeds the preset threshold will the MPC scheme be triggered to update the control signal. Otherwise, the MPC scheme is paused and the control signal remains unchanged. Therefore, compared with the FCS-MPC method, the ET-MPC method has lower calculation burden, less switching action and less switching loss, while maintaining the excellent dynamic performance of traditional MPC method. Therefore, the ET-MPC is perfectly suited for the CSM SIMO converter. The simulation results verify the effectiveness of the proposed method.