Design and performance analysis of a single phase rectification system by using Cuk converter and EMI filter

The demand of DC equipments are increasing day by day due to rapid development of power electronics devices and green energy. But most of the power generating systems engenders power in the form of AC. Consequently an efficient rectification system is strongly recommended to convert AC into DC. A close study of usual AC to DC conversion system arises a number of problems such as high THD, low power factor, low voltage regulation etc. This paper offers an analysis of rectification systems. In every system converters are fed through the rectifier and output has taken through a filter. Their subsequent effect on the voltage, power and THD waveforms have observed. In full-bridge rectifier, the amount of THD is so high. Here a conventional boost PFC converter is analyzed with a regular filter (LC) in which the power factor is not better and amount of THD is so high. So the boost converter is replaced by cuk converter and responses are analyzed for various regular filters in which amounts of THD were not in permissible limit. Finally in favor of a rectification system this paper presents an efficient rectification system amalgamated of cuk converter and EMI filter. In case of cuk converter with EMI filter, it is seen that the amount of THD is greatly low and power factor is better than the previous traditional boost converter. All the circuits are simulated in MATLAB Simulink environment and the desired outputs have obtained.