Analysis of load current ripples in a four level Buck Converter

A buck converter is a dc to dc converter which can be categorized in the DC chopper family. Buck converter is a static device that is mainly used to obtain a variable DC output voltage which is less than the input fixed DC voltage source. Harmonics is the major concern in a Buck converter system. The interference of harmonics signal often results at the input and output of the load side. With the occurrence of this harmonics interference, the efficiency and performance of the Buck converter is affected. This paper focuses, the harmonic problem encountered by a four level Buck Converter. Four levels with two different loads like R load and R-L load are considered during the analysis. By increasing the levels It is possible to reduce the harmonic present in the output.