A simple analog controller to reduce line current distortion of single phase boost rectifier

This paper presents a method to obtain low input current distortion at higher voltage loop bandwidth. A simple RC low pass filter is used in high bandwidth voltage loop to attenuate dominant second order ripples from the control voltage to obtain low input current distortion. This method reduces the complexity in hardware involved in filter implementation. The proposed work keeps the harmonic distortion under 6–7% at voltage loop bandwidth as high as 50Hz. A 250W single phase rectifier system is designed and simulated on MATLAB/SIMULINK software. A prototype of single phase boost converter rated at 250W, 85V-260V (input rms), 385V (output) is fabricated with the UC3854 analog controller to validate the proposed control scheme.