A novel topology for single phase active PFC circuit

This paper offers a new structure of active power factor correction (APFC) circuit that can be used in single phase AC/DC rectifiers. The proposed design concentrates on controlling the operation time of the main capacitor in such a way that the third order harmonic component can be eliminated at the input source side effectively. This method has been designed and simulated using LTspice-simulink program. The results show almost a unity power factor at the input side and a very small size PFC inductor used in the proposed circuit in comparing with a conventional boost circuit, which tremendously reduces the size and weight of the new converter. Simultaneously, the new topology gives a the ability to the users to change the output ripple DC voltage to be flexible in compromising with the input power factor by changing the duty cycle of MOSFET switches. Furthermore, the new circuit can works accurately without a snubber circuit as the freewheeling diode offers an alternative path for the current.