南京信息工程大学学报2025，Vol.17Issue(1)：108-116,9.DOI:10.13878/j.cnki.jnuist.20230915004
含未知恒功率负载的升降压变换器无电流传感有限时间控制
Current sensorless finite time control for buck-boost converter with unknown constant power load
摘要
Abstract
This paper addresses the current sensorless finite time control for the buck-boost converter with unknown constant power load.The low frequency oscillation caused by negative impedance of constant power loads can ad-versely affect the stability of buck-boost converters.First,to reconstruct unavailable inductor current and unknown power load,a reduced-order generalized parameter estimation based observer with finite time convergence is designed on the basis of dynamic regression extension and mixing techniques,which is able to reformulate the state observation as parameter estimation.Second,the nonlinear system is converted into a linear one via a feedback lin-earization approach,and a Fast Terminal Sliding Mode Controller(FTSMC)is designed to stabilize the system.Sub-sequently,a current sensorless finite time controller is proposed by combining the FTSMC with the generalized pa-rameter estimation based observer.Then the finite time stability of the closed-loop system is proved by the finite time stability result of the cascaded system.Finally,the effectiveness of the proposed current sensorless finite time control scheme is verified by simulation and experiment results.关键词
升降压变换器/恒功率负载/无传感控制/有限时间控制/快速终端滑模控制Key words
buck-boost converter/constant power load/sensorless control/finite time control/fast terminal sliding mode control分类
信息技术与安全科学引用本文复制引用
贺伟,陈文豪..含未知恒功率负载的升降压变换器无电流传感有限时间控制[J].南京信息工程大学学报,2025,17(1):108-116,9.基金项目
国家自然科学基金(62173205) （62173205）
