BRIDGELESS HIGH POWER FACTOR BUCK CONVERTER WITH CONTROLLED BOOST CONVERTER

Abstract

Power factor is an important performance parameter of a system. If the power factor of a system is low, it draws more current from the supply. So improving power factor is very much essential for better and economic performance of a system. This seminar report introduce a new power factor correction circuit which overcomes all the drawbacks of conventional power factor correction approaches. This proposed circuit will provide output voltage range of 257V, with input power factor 0.81 and input current THD of 40 % . Here bridgeless buck rectifier output is given as input to the boost converter for maximising the output voltage level. Simulation has been carried out to study the performance of the proposed topology in MATLAB R2010a /SIMULINK environment.