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Investigation of Harmonic Content and Power Factor Improvement for Single Phase AC-DC Converter Topologies

K Vijayakumar, J Srihari

AC/DC converters possess no harm for pure resistive loads as Output Voltage Ripple can be compromised. In almost all practical applications of the Converter, the Power quality issues like Input Current Distortion and poor Power Factor comes into picture. These make the Converter Operation inefficient. Optimal Filter Design and Topological approach for addressing this issue are the possible ways for improving the efficiency of the Converter. This paper investigates the harmonic content and other power quality issues like displacement factor, distortion factor for various Single Phase Converter topologies. The Total Harmonic Distortion is seen to be minimum and Power Factor nearly unity for closed loop Power Factor Improvement. The Converters are simulated in MATLAB/Simulink and the results are obtained.