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Adaptive Continuous Sliding Mode Control of Buck Converters Based on Zero-Crossing Checking

  • School of Electrical Engineering and Automation, Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, an adaptive continuous sliding mode (SM) control approach is proposed for buck converters by introducing a novel zero-crossing checking mechanism into the twisting algorithm. Instead of the traditional first-order SM approaches, the twisting algorithm can solve their inherent chattering problem and realize the control continuity at the price of unnecessary constant control gain and low precision. Differing from the traditional adaptive mechanisms based on fuzzy logic or Lyapunov stability, the convergence characteristics of the controlled buck converter system are analyzed and further an adaptive twisting algorithm is proposed based on zero-crossing checking online to achieve a time-varying control gain. The number of the zero-crossing checking points can be calculated and the system stability is investigated. Comparative simulations with the traditional twisting algorithm validate the improved algorithm with advantages of high accuracy and excellent performance.

Original languageEnglish
Title of host publicationIECON 2021 - 47th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE Computer Society
ISBN (Electronic)9781665435543
DOIs
StatePublished - 13 Oct 2021
Externally publishedYes
Event47th Annual Conference of the IEEE Industrial Electronics Society, IECON 2021 - Toronto, Canada
Duration: 13 Oct 202116 Oct 2021

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
Volume2021-October

Conference

Conference47th Annual Conference of the IEEE Industrial Electronics Society, IECON 2021
Country/TerritoryCanada
CityToronto
Period13/10/2116/10/21

Keywords

  • Sliding mode
  • adaptive control
  • buck converter
  • twisting algorithm
  • zero-crossing checking

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