Comparative Study of Open Loop and Closed Loop of Three Phase Active Power Factor Correction Based Buck Converter

Here with rapid growth in semi conducting devices the power loss is reduced and efficiency is increased.In this paper a open loop and closed loop of new three phase single switch active power factor correction (APFC)circuit based on quadratic (square)buck converter is proposed and analysed, through which we get extensive step down ratio and high power factor.The single-switch, quadratic step down dc-dc buck converter that can operate with input active power factor correction in both open loop and closed loop.Finally, this three-phase single switch quadratic buck APFC circuit was simulated using MATLAB/Simulink software. This result show that the power factor is high to 0.976 & 0.999 in open loop and closed loop circuit and the total harmonic distortion (THD) is low to 3% of the APFC converter.