Abstract: The use of electronic equipment has increased in last few years. AC rectification is a very inefficient process, resulting in waveform distortion of the current which is drawn from the source. This produces a large spectrum of harmonic signals that may interfere with other equipment. In input rectifier bridge the conventional boost PFC suffers from the high conduction loss. By using bridgeless boost converter higher efficiency can be achieved. The voltage sensing, current sensing and EMI noise has issues in this new circuit. In this paper at different voltage level by changing the duty ratio the affect of efficiency is studied for both conventional and bridgeless boost convertor.

Keywords: Power factor Correction (PFC), Boost Converter, Duty ratio, MATLAB/SIMULINK.