Design and Analysis of a 60 kW DC-DC converter for Hybrid Electric Vehicle

Abstract

This work aims at the design and analysis of Bidirectional dc-dc converter with two different core materials and different core shape at 20 kHz 450 V voltage level. The losses and efficiency of converters are studied at a specified frequency and voltage. Converter designed is analysed at 450 voltage level. Results show that losses are higher in EC-70 core at 20 kHz, 450V system. The result suggests that the use of iron powder as core material increases the losses of the converter. The result also shows that the core shape ETD-49 has smaller core losses as compared with the EC-70 core. Designed converter is then analysed by developing state space averaging model taking into consideration designed values of resistance and reactance of the components of the bidirectional converter. Finally approximate state space model then analysed with bode plots and pole location and stability of the transfer functions are being checked.