Experimental Verification of Robust PID Controller under Feedforward Framework for a Non-Minimum Phase DC-DC Boost Converter

Tarakanath Kobaku, R Jeyasenthil, Subham Sahoo, Tomislav Dragicevic

Research output: Contribution to journalJournal articleResearchpeer-review

21 Citations (Scopus)

Abstract

This work addresses the disturbance rejection problem of a non-minimum phase DC-DC boost converter operating in the continuous conduction mode (CCM) using a novel robust PID controller design method. The proposed idea is to design the controller using the equivalent feedforward formulation of the modified direct synthesis (MDS) approach. The advantages of the proposed MDS design are (i) systematic incorporation of disturbance dynamics and the converter dynamics explicitly in the controller design to reduce the complex tuning effort of the controller parameters, (ii) allowing the converter to operate close to the performance limit set by the zero in the right half plane (RHP), (iii) the closed-loop performance specifications can be incorporated into the desired loop response using only single tuning parameter based on Bode’s gain cross-over frequency inequality, (iv) attenuates the loop gain to improve the disturbance rejection and (v) realization of controller requires only output voltage as a feedback signal. The strength of the proposed MDS method is compared with the internal model control (IMC) method in both simulations and experiments. Based on these responses, the proposed PID ensures robust performance to the model-plant mismatch and allows the output voltage to quickly recover back to the operating voltage in the presence of external disturbances with less inductor current.
Original languageEnglish
JournalI E E E Journal of Emerging and Selected Topics in Power Electronics
Volume9
Issue number3
Pages (from-to)3373-3383
ISSN2168-6777
DOIs
Publication statusPublished - Jun 2021

Keywords

  • Adaptive control
  • DC-DC converter
  • DC-DC power converters
  • Disturbance dynamics
  • Modified Direct Synthesis
  • PID
  • Sensors
  • Transfer functions
  • Tuning
  • Voltage control
  • Voltage regulation

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