International Journal of Engineering Research and General Science Volume 3, Issue 4, Part-2, July-August, 2015 ISSN 2091-2730 522 www.ijergs.org A Voltage Quadruple DC-DC Converter with PFC Cicy Mary Mathew, Kiran Boby, Bindu Elias P.G. Scholar, cicymary@gmail.com , +91-8289817553 Abstract— A two inductor, interleaved power factor corrected converter exhibiting voltage quadruple characteristic is introduced. The proposed converter operates at a duty cycle more than 50%. The input P.F is improved along with reduced voltage stress Across the semiconductor devices. Also a high voltage gain is obtained almost 4 times that of a conventional boost converter. The simulation are carried out for 25 V AC input in MATLAB/SIMULINK 2010a, to justify the properties of the proposed converter Keywords— Volt-sec balance, High voltage gain, Voltage quadruple, power factor, active PFC, Ripple cancellation, interleaved converter INTRODUCTION To meet the challenges of ever-increasing power densities of today‟s AC/DC power supplies, designers are continuously looking for opportunities to maximize the power-supply efficiency, minimize its component count, and reduce the size of components. Full- bridge diode rectifier has long been used in AC/DC conversion due to its simple and robust circuit. A single DC/DC converter, which is connected after the rectifier, is then able to perform power factor correction (PFC) and output voltage regulation .When an electric load has a PF lower than 1, the apparent power delivered to the load is greater than the real power that the load consumes. Only the real power is capable of doing work, but the apparent power determines the amount of current that flows into the load, for a given load voltage. Power factor correction (PFC) is a technique of counter acting the undesirable effects of electric loads that create a power factor PF that is less than 1. Most of the research on PFC for nonlinear loads is actually related to the reduction of the harmonic content of the line current. There are several solutions to achieve PFC. There are two types of PFC 1) Passive PFC 2) Active PFC. The Active PFC is further classified into low-frequency and high-frequency Active PFC depending on the switching frequency. The block diagram of power supply with Active PFC network is shown in figure. 1. Here we see it has an active PFC and a DC DC converter which works as a power conditioner and the load is connected. The load may be a DC load or an AC load connected through an inverter. The operating principle of the proposed circuit is explained in detail in the following sections The circuit is divided into two sections : the PFC stage and the converter stage. Design of the components is also explained briefly in the third section. Section 4 shows the simulation results. Figure.1 : Block diagram of power supply with an Active PFC OPERATING PRINCIPLES An Active power factor correction makes the load behave like a resistor leading to near unity load power factor and the load generating negligible harmonics. The input current is similar to the input voltage waveform‟s wave shape. The proposed c ircuit consists of an input PFC stage connected to a boost DC DC converter via a DC link. The figure 1shows the block diagram of power supply with an Active PFC.