Simulation of Power Factor Correction Boost Converter

This project proposes a Power Factor Correction (PFC) Controller applicable for maintaining high input power factor of boost converter. The input current distortion occurs due to ripple in the output voltage feedback, input voltage feed forward path, distortion in the input voltage, non-linearity in the multiplier and poorly designed current regulator. These factors cause reduction in power factor. Thus two or more component factors are taken into account for power factor improvement by neglecting the input of other components. In this project ripple in output voltage feedback, input voltage feed forward path and an improved current regulator are considered. It requires micro controller, analog to digital converter and PWM generator. By using microcontroller, triggering pulses are generated. The boost converter is used to get increased voltage at the output end. If load is varied, the output voltage varies, which causes a change in the input power factor of the circuit. In a PFC, the controller works to improve the input side power factor by adjusting the duty cycle. Here the duty cycle is adjusted for power factor correction in addition to its variation for maintaining constant voltage at the output end. To improve the power factor, the input current is made to follow the input side voltage.