Robust control applied to improve the performance of a buck-boost converter

  • Authors:
  • Wilmar Hernandez

  • Affiliations:
  • Universidad Politecnica de Madrid, EUIT de Telecomunicacion, Department of Circuits and Systems, Madrid, Spain

  • Venue:
  • WSEAS Transactions on Circuits and Systems
  • Year:
  • 2008

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Abstract

In this paper, H∞ loop-shaping control is applied to improve the performance of a buck-boost dc-dc power converter based on pulse-width-modulation (PWM) techniques. Here, classical control techniques (i.e., proportional-integral-derivative (PID) control) and post-modern control techniques (i.e., H∞ control), are used to design the feedback loop of a buck-boost dc-dc power converter. The results of the experiment are satisfactory and show that robust controllers do not depend strongly on the operating point, and that H∞ loop-shaping control performs better than PID control.