Analysis and Modelling of Two-Phase Interleaved DC to DC Boost Converter with Lifting Capacitor for Fuel Cell Hybrid Electric Vehicle

摘要

Full cells are the popular choice as source of energy in many applications like hybrid electric vehicle as they have many advantages over other sources besides the fact that they do not discharge any pollutants. The interleaved dc to dc boost converters are used with fuel cells to match the demand of load voltage as the output of one fuel cell is approximately 0.6-0.7 V. The conventional dc converters produce higher input current ripple as well as higher output voltage ripple. In order to overcome these, a unidirectional interleaved dc to dc boost converter is used because interleaving helps in reducing the input current ripple, output voltage ripple and also cuts the voltage stress on switches. Several topologies of interleaved dc to dc converters are explored in recent years such as conventional two-phase and double-dual boost two-phase interleaved converter topology. This paper proposes a modified high voltage gain two-phase interleaved boost converter and compares this topology with conventional two-phase and double-dual boost two-phase interleaved converters. The topologies are simulated in MATLAB and results are compared on the basis of output voltage gain, ripple content in input current and output voltage.