Dynamics Characterization of Coupled-Inductor Boost DC-DC Converters

Authors:
  • SDSuman Dwari
    Suman Dwari
  • SJSaurabh Jayawant
    Saurabh Jayawant
  • TBTroy Beechner
    Troy Beechner
  • SMStephanie K. Miller
    Stephanie K. Miller
  • AMAnu Mathew
    Anu Mathew
  • MCMin Chen
    Min Chen
  • JRJonathan Riehl
    Jonathan Riehl
  • JSJian Sun
    Jian Sun

Abstract
Dynamic characterization of the coupled-inductor boost DC-DC converter is presented. Operating of the converter in both continuous conduction mode (CCM) and discontinuous continuous conduction mode (DCM) are studied. A state variable equivalent to the inductor core magnetic flux is defined to avoid the problem with using the discontinuous inductor current as a state variable. Dynamic model of the converter under peak-current control is also developed. Control to output transfer functions are calculated for all the dynamic models and are validated by experimental measurements. A comparison to the conventional boost converter is provided

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