Title: An approximation time optimal control approach for DC-DC buck converter

Authors: Yonghui Chen; Keqiang Bai; Zhigui Liu

Addresses: Southwest University of Science and Technology, Mianyang 621010, Sichuan, China; Artificial Intelligence Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Zigong, Sichuan, China ' Southwest University of Science and Technology, Mianyang 621010, Sichuan, China ' Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Abstract: A new approach based on Time Optimal Control (TOC) method for DC-DC buck converter is presented. The switch curve of TOC for buck converter is obtained and is approximated by an analytic expression. Therefore, the switch function of the Approximation Time Optimal Control (ATOC) can easily adapt to changes in load and settings. The synthesis of converter controller is discussed in detail. Performance of the proposed method under a change in reference input voltage and load resistance was investigated. Simulation results show that the proposed method has better start-up response performance and load disturbance rejection than the Terminal Sliding Mode Control (TSMC) method.

Keywords: DC-DC buck converter; time optimal control; terminal sliding mode control; switch curve.

DOI: 10.1504/IJWMC.2021.115663

International Journal of Wireless and Mobile Computing, 2021 Vol.20 No.3, pp.290 - 296

Received: 20 Aug 2020
Accepted: 28 Jan 2021
Published online: 15 Jun 2021 *

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