COMPARETIVE STUDY OF PI CONTROL & SM CONTROL FOR BUCK CONVERTER

Abstract

As the characteristics of power sources and
electrical/electronic loads become more widely varied, nonlinear,
and unpredictable, the control of the power converters that
provide the necessary power processing functions will play an
important role in optimizing performance and maintaining the
needed robustness under various operating conditions.The SM
control is naturally well suited for the control of variable
structure systems like power converters. Buck converter is
variable structure systems. So, it is appropriate to apply SM
control on Buck converter. The reported experimental works
focused attention on performance evaluation of Buck converter.
Simulation results show the characteristics of Buck Converter in
close loop mode. The work compares the performances of a Buck
converter controlled by conventional PI controller and SM
controller.