One of the main requirements for battery charging applications is constant output voltage and fewer ripples in the output voltage. Boost converters are used in places where the magnitude of the supply voltage is low. But in conventional boost converters, the magnitude of ripple in both the input current and output voltage are high which is not desired. While the input current ripple is reduced in conventional boost converter, the size of the components used is large. In order to reduce the ripples along with reduction in the component size, interleaving concept used. This paper focusses on the operation of four phase interleaved boost converter both in open and closed loop schemes. In the closed loop operation, current control mode is employed because of its faster response to changes along with simpler compensation and high gain bandwidth compared to the voltage control mode. The simulation of the circuit is carried out in MATLAB/SIMULINK and the results are validated for both the schemes.

Conventional sources like fossil fuels were used earlier to satisfy the energy demands. Nowadays these are being replaced by renewable sources like photo-voltaic sources. Photo-voltaic is a method of generating electrical power by converting the energy from the sun into direct current with the use of semiconductor devices that exhibit photovoltaic effect. They do not cause environmental pollution and do not require any moving parts. Different types of DC-DC Converters have been proposed in literature but Inter-leaved boost Converter (IBC) is widely used because of its fast dynamic response and high power density. This paper presents an analysis of the Ripple Cancellation Network (RCN) based two phase Interleaved boost Converter (IBC) for photo-voltaic applications. The results illustrate that IBC is more efficient than conventional boost converter as it reduces the input current ripple, output voltage ripple, component size and improves its transient response. On adding the Ripple Cancellation Network to the conventional IBC, the output voltage and input current ripple are further reduced without increasing the diode current stress. Simulations are carried out using MATLAB/Simulink software to verify with the theoretical results. Experimental setup is developed for the proposed converter and the results are verified.