Output-voltage-tracking Control for Buck Converters using Variable Convergence Rate Mechanism without Current Feedback

Seok Kyoon Kim, Ki Chan Kim, Choon Ki Ahn

Research output: Contribution to journalArticlepeer-review

Abstract

This study aims to accomplish the output voltage tracking task for buck converters without current feedback, diminishing the performance degradation from model-plant mismatches and load variations. The following contributions overcome these difficulties: a) the combination of Luenberger and disturbance observer (DOB) techniques for a parameter-independent voltage-derivative observer, b) the pole-zero cancellation control incorporating the DOB and active-damping injection techniques, and c) the exponential convergence guarantee to the target tracking system subject to the variable convergence rate mechanism. Convincing experimental evidence confirms the effectiveness of proposed tracking control using a prototype 3-kW buck converter control system.

Original languageEnglish
JournalIEEE Transactions on Industrial Electronics
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Active-damping
  • Buck converter
  • Observers
  • Variable convergence

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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