DC/DC buck converter using internal model control

Xile Wei, K. M. Tsang, Wai Lok Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)


An internal model control with a conditional integrator is proposed for the robust output regulation of a DC/DC buck converter. Based on the input-output linearization from the state-space averaged model of DC/DC buck converter, the robust output regulation problem of the converter can be converted into a robust stabilization problem of an augmented system consisting of the given buck converter and the internal model by introducing a proper internal model. The procedures include the design of an internal model with conditional integrator and a sliding-mode robust controller. Also the closed-loop robust stability is theoretically analyzed. Finally, the effectiveness of the proposed converter is verified in comparing the proposed controller performance with open-loop control, single-loop proportional-plus-integral control, and double-loop proportional-plus-integral control under load disturbances and supply voltage variations.
Original languageEnglish
Pages (from-to)320-330
Number of pages11
JournalElectric Power Components and Systems
Issue number3
Publication statusPublished - 1 Mar 2009


  • Buck converter
  • DC/DC converter
  • Internal model control

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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