Power Factor Correction by Boost Converter

Conventionally the AC-DC conversion is done by making use of full wave bridge rectifier and a capacitor filter at the output to absorb the power pulsation there by reducing the ripple in the output voltage. But this conventional technique does not take account of the input power factor which must be high. Low power factor reduces the power available from the utility grid. An ideal power factor corrector must have a resistor on the supply side and at the same time it should maintain fairly regulated output voltage. The objective of the present paper is to design the proposed two switches Boost convertor with high power factor and with the ability to set the output voltage arbitrarily. Firstly, this paper describes the modes of operations of the proposed converter. Secondly, the average current control technique is applied to the Boost converter for power factor correction. Power Factor Correction (PFC) is generally used to compensate systems in which the source current and voltage wave forms are out of phase and distorted.