Abstract:
This seminar report presents a novel Interleaved Buck Converter(IBC) with feed
back control. Proposed IBC is suitable for application where input voltage is high and
operating duty cycle is less than 50% . In this IBC two active switches are connected
in series and a coupling capacitor is employed in the power path. It shows that the
voltage stress across all the active switches is half of the input voltage before turn-on
or after turn-off when the operating duty is below 50% . So the capacitive discharg
ing and switching losses can be reduced considerably. It allows proposed IBC to
have higher efficiency and operate with higher switching frequency. In addition, the
proposed IBC has a higher step-down conversion ratio and a smaller output current
ripple compared with a conventional IBC.Closed loop control using PI controller has
been done to improve the system performances. Closed loop control provides a good
regulated output voltage. Simulation can be carried out to study the performance of
the proposed topology in MATLAB R2010a environment.
