Performance Analysis of Bridgeless Converter based SMPS

This paper deals with performance analysis of bridgeless converter based switched mode power supply (SMPS) of improved power quality. PFC based bridge less SMPS having so many applications in the area of welding power supply with IPC. Conventional Diode bridge converter based SMPS gives high distortion in supply current and hence lower power factor. To remove this power quality problem of without bridge buck-boost one phase single ended primary inductance converter based SMPS proposed. Due to the absence of Diode Bridge in input side and availability of two switches enhance the power quality. the operation involved here is discontinuous conduction mode. Bridgeless SEPIC -converter based SMPS operate with single-phase ac supply. Proposed connection worked in conduction mode of discontinuous which results in improved power factor. The analysis and performance of bridgeless SEPIC type SMPS based rectifier is done under the 220-Vrms input supply voltage and 120-Watt resistive load. The result is analyzed by simulating the proposed circuit in MATLAB/Simulink.