Abstract:
Buck converters are the powering unit for consumer
and medical electronics systems however they will have
considerable switching and power losses. The power
losses occurring on diodes in such converter can be
avoided by designing Synchronous Buck Converter
(SBC). In this proposed work two types of controller
namely dual loop and Dynamic Evolution (DE) control
is designed for SBC. Dual loop control has very faster
response with very good set point tracking for normal
load variations.But for drastic load variations or
extreme load conditions; the controller performance of
dual loop controller degrades. SBC with DE control
however provides robust performance for drastic load
variations. This robust performance measures are
compared with Simulink as well as hardware results. In
this paper, the drastic load changes are designed in
hardware circuit using a programmable switch to
create a load variation environment and the SBC with
proposed DE controller is tested for robustness in this
environment. The efficiency of proposed controller has
been found to be greater than any conventional
converter with satisfied performance measures.
