Quantitative Feedback Design Based Robust PID Control of Voltage Mode Controlled DC-DC Boost Converter

Tarakanath Kobaku, R. Jeyasenthil, Subham Swaroop Sahoo, Rijil Ramchand, Tomislav Dragicevic

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This work addresses the problem of instability occurring in the voltage control mode of a non-minimum phase (NMP) DC-DC boost converter. To solve this instability issue in the presence of uncertainties and the external disturbances, quantitative feedback theory (QFT) is adapted to systematically design a robust proportional integral derivative (PID) controller, which is realized using only sensed output voltage as feedback. The advantages of the proposed PID design using the QFT are: (i) it eliminates the burden of tedious and ad-hoc tuning of PID gains using the conventional PID design approaches, (ii) current measurement is not required, (iii) disturbance dynamics (input voltage and load current variations) are included in the design stage itself, which further enhances the disturbance rejection performance of the output voltage, and (iv) it allows direct design for the non-minimum phase boost converter despite the bandwidth limitations. Extensive simulations and experiments are carried out to validate the efficacy of the proposed PID controller in the presence of the external disturbances and compared its superiority over a conventional PID controller.
Original languageEnglish
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
VolumePP
Issue number99
Number of pages5
ISSN1549-7747
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • DC-DC converter
  • Disturbance dynamics
  • PID
  • Quantitative feedback theory
  • Voltage regulation

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