DESIGN AND IMPLEMENTATION OF INTERLEAVED DC-DC BOOST CONVERTER

Abstract

DC-DC converters are widely used in Industrial, Commercial and Non Renewable energy applications and also especially in Switch Mode Power Supplies. To meet the increased demand/power several new topologies are being developed that operates at high efficiency rate and relatively simple control especially a more attention is going towards development of compact power supplies having light weight, with faster dynamics. This thesis deals with a design and implementation of interleaved DC-DC Boost Converter of Two phase for low input voltage (battery or photovoltaic) applications. The steady state performance of the interleaved boost converter is investigated by MATLAB/ simulation. The modelling and analysis is carried out considering the parasitic elements of all the components in converter. The Interleaved Boost Converter (IBC) is modelled and analyzed by using state space averaging technique and analysis is carried out by using small signal analysis to design a precision control. The converter controller is implemented by using duty ratio greater than 0.5 with continuous inductor current is considered as per converter specification. The interleaved concept is used to meet the increased demands and also a low current ripple in source current due to this reducing the size of the filter component in input and output. Using interleaving concept can reduces stress on the devices, increases in efficiency, faster dynamics, light weight, compactness and higher power density. The digital controller was designed and implemented by using Field Programmable Gate Array (FPGA). The digital controller gives improved augment time as well as settling time. The FPGA based digital controller gives faster response, more compactness, power efficient and provides high speed capabilities as compared to analog based PID controllers.