N. Chakradhar
B.Tech students, Department of EEE, AITAM College of Engineering, Tekkali, A.P, India
T. Sowjanya,
B.Tech students, Department of EEE, AITAM College of Engineering, Tekkali, A.P, India
R. Vinodhkumar
B.Tech students, Department of EEE, AITAM College of Engineering, Tekkali, A.P, India
M. Dhauryodna
Assistant Professor, Department Of EEE ,AITAM College Of Engineering, Tekkali, A.P, India
K. Kanakaraju
Assistant Professor, Department Of EEE ,AITAM College Of Engineering, Tekkali, A.P, India
Download PDFThe devices generally used in industrial, commercial and residential applications need to undergo rectification for their proper functioning and operation. They are connected to the grid comprising of non-linear loads and thus have non-linear input characteristics, which results in production of nonsinusoidal line current. Also, current comprising of frequency components at multiples of line frequency is observed which lead to line harmonics. Due to the increasing demand of these devices, the line current harmonics pose a major problem by degrading the power factor of the system thus affecting the performance of the devices. Hence there is a need to reduce the line current harmonics so as to improve the power factor of the system. This has led to designing of Power Factor Correction circuits. In this paper we designed an active Power factor circuit using Buck converter for improving the Power Factor. An improved constant ON time control is proposed to operate in critical conduction mode (CRM).And to eliminate the dead zones in Ac input current by adding an auxiliary switch and two diodes. With optimal control parameters, nearly unit power factor can be achieved. Moreover, the efficiency of the proposed converter is not deteriorated compared to the conventional buck converter. When the result are verified by using MATLAB/SIMULINK.
Keywords: Efficiency; Correction ; Applications ;conventional
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