Design and analysis of 60 kW DC-DC converter for plug-in hybrid electric vehicle applications

Abstract

This thesis deals with the design and analysis of dc-dc converter with different core materials, core shapes, voltage levels and frequencies. The losses and efficiency of the converter is investigated. Furthermore the weight and losses of the converter are studied at different frequencies. Analytical results shows that losses are higher in the 900 V system as compared to the 450V system.The analysis also shows that by increasing the operating frequency, the losses increases but the weight of the converter is reduced. A comparison of the two voltage level systems as proposed in the report shows that the two voltage systems behaves differently at different power losses but it is noted that the low voltage system is more energy efficient. The result suggests that the use of iron powder as core material reduces the weight of the converter. The result also shows that the core shape ETD-59 has smaller core losses as compared with the EC-70 core shape.