An Improved High Voltage DC-DC Converter with Partial-Resonant Network for Enhanced Efficiency and Power Density in Electric Vehicle Applications

This paper proposes an improved high voltage dc-dc converter with a partial-resonant network (partial- resonant HDC) to be used in electric vehicle applications for enhanced efficiency and power density. In order to achieve enhanced performance compared to the conventional HDC, an approach for the optimal switching frequency is conducted by considering the trade-off between the efficiency and power density. Furthermore, an optimization of the partial-resonant network which enables the designer to place more emphasis on either the efficiency or the power density is concerned. The validity of the partial-resonant HDC performance is verified through the experimental results of the manufactured HDC under the 13.3 kW load condition, and the efficiency is enhanced by 0.73% maximally, and the power density is improved by 14.23%.