INTERLEAVED BUCK CONVERTER USING MPPT ALGORITHM

ELECTRONICS AND INSTRUMENT ENGINEERING

In this project proposes a simple and efficient interleaved buck converter (IBC) which was having low switching losses and improved step-down conversion ratio was proposed, IBC is suitable for photovoltaic battery charging application where the input voltage is high. It is similar to the conventional IBC, but in proposed IBC the two active switches are connected in series. The proposed IBC shows that the voltage stress across all the active switches is half of the input voltage before turn-on or after turnoff when the operating duty is below 50%.The capacitor charging and discharging depends upon the turn on and turn off operation of the switches and switching losses can be reduced considerably. This allows the proposed IBC to have higher efficiency and operate with higher switching frequency. By operating with the higher switching frequency, the proposed IBC has a higher step-down conversion ratio and a smaller output current ripple compared with a conventional IBC. The feasibility of the proposed topology is experimentally verified for a output current of a 20A max.

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