A GaN-based DC/DC converter for e-vehicles applications

Abstract

This paper presents a 4 kW GaN-based isolated bidirectional DC/DC converter suitable for on-board auxiliary power supply systems, interconnecting the HV batteries with the LV on-board power supply system. To enable the trend towards higher levels of electrification, a second LV level of 48 V is introduced to supply the high-power consumers, relieving the 12 V grid on the one hand and/or avoiding using additional costly isolated converters connected to the HV batteries on the other. The built converter prototype aims to demonstrate higher efficiency, compactness and lower filter requirements of the proposed circuit.

An integrated modelling and parameter design method for the RC snubber in novel cascode GaN‐based bridge convertors

“…As the wide bandgap (WBG) semiconductor devices based on gallium nitride (GaN) are better in the figure of merit than that of state-of-the-art silicon (Si) devices [1][2][3], they have distinct advantages in designing high frequency convertors with high power density, high efficiency, and fast response characteristics [4][5][6]. Once GaN technology and its application are fully developed, the performance of convertors in many applications, such as the energy storage system [7], electric vehicles [8,9], photovoltaics [10], and electric aircraft [11,12], will be increased to a much higher level.…”