A Reduced-Order Enhanced State Observer Control of DC-DC Buck Converter

Jinghang Lu, Mehdi Savaghebi, Yajuan Guan, Juan C. Vasquez, Amer M.Y.M. Ghias, Josep M. Guerrero

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This paper presents a reduced-order enhanced state observer (RESO)-based control strategy for the PWM DC-DC buck converter. With the proposed RESO control strategy, the output voltage regulation of the DC-DC buck converter is able to achieve robust characteristics against the external disturbance and internal parameter variation even without output current measurement. In addition, by incorporating the RESO in the controller, the output voltage regulation can be easily achieved with only a proportional gain to realize a zero steady-state error. Finally, the parameter design is discussed and the effectiveness of the proposed control strategy is verified with experimental case study.

Original languageEnglish
JournalIEEE Access
Pages (from-to)56184-56191
Publication statusPublished - 26. Sep 2018


  • Buck converters
  • Capacitors
  • DC-DC buck converter
  • Disturbance rejection
  • Feedforward systems
  • Inductors
  • Observers
  • Reduced-order enhanced state observer
  • Robustness
  • System parameter variation
  • Voltage control
  • disturbance rejection
  • robustness
  • system parameter variation
  • reduced-order enhanced state observer


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