PERFORMANCE EVALUATION OF BRIDGELESS AND PHASE SHIFTED SEMI BRIDGELESS INTERLEAVED BOOST CONVERTERS (IBCS) FOR POWER FACTOR CORRECTION

摘要

Hybrid Electric Vehicles (HEVs) require a constant DC supply which usually needs power conditioning involving non-linear devices. The use of non-linear devices induces harmonics and distortion in the supply current. Therefore there arises a need for power factor correction in the ACDC converter of the charging system of HEVs. There are several topologies for power factor correction, among them the Bridgeless Interleaved and Phase Shifted Semi Bridgeless Interleaved topologies are highly efficient and yield a power factor closer to unity. This paper focuses on Bridgeless and Phase Shifted Semi-Bridgeless Interleaved Boost Converter topologies as solutions to the problem. The topologies are simulated using MATLAB and performance parameters like Total Harmonic Distortion (THD) in the line current, input power factor, purity factor, displacement factor, device losses, total loss and efficiency for both the topologies are evaluated and compared. On comparison this paper insists that the Phase Shifted Semi-Bridgeless Interleaved Boost topology is the best suited topology for use in HEVs under varying loads.