INVESTIGATION OF FOUR PHASE INTERLEAVED BOOST CONVERTER UNDER OPEN LOOP AND CLOSED LOOP CONTROL SCHEMES FOR BATTERY CHARGING APPLICATIONS

Abstract

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.