A new non-isolated bidirectional converter is proposed on this work. This converter stage is suitable for applications of DC and AC motor drives. In this converter, for a given duty cycle, the output to input voltage ratio can be raised by adding transformer turns ratio. Another important feature of this converter is the lower blocking voltage across the controlled switches compared to similar circuits, which allows the utilization of MOSFETs switches with lower conduction resistances R DS(on) . In order to verify the feasibility of this topology; principle of operation, theoretical analysis, and experimental waveforms are shown for a 500W assembled prototype.
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.
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