Current Sensor-Free Output-Feedback Voltage Control for DC/DC Converters via Critical Damping Injection Technique for Converter-Fed Servo System Applications

Seok Kyoon Kim, Sun Lim, Choon Ki Ahn

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study proposes an observer-based multiloop output-feedback system that regulates the output dc-link voltage of dc/dc converters to the desired value to lower the system model dependence level. There are a few features: 1) the outer loop injecting the nonlinear active damping to ensure the critically damped output voltage response; 2) a model-independent output voltage derivative observer facilitates the inner loop and eliminates the need for complex matrix calculations for tuning the estimation performance; and 3) the use of a pole-zero cancellation acceleration error stabilizer for the inner loop helps maintain the targeted closed-loop performance. The experimental study adopts a 420-W brushless dc motor dynamo system as the load for the prototype 600-W bidirectional converter controlled using the proposed solution.

Original languageEnglish
Pages (from-to)1906-1916
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume71
Issue number2
DOIs
Publication statusPublished - 2024 Feb 1

Bibliographical note

Publisher Copyright:
© 1982-2012 IEEE.

Keywords

  • Critical damping
  • current sensor-free
  • dc/dc converter
  • observer
  • output-feedback system

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering

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