Abstract
In this paper, an accurate efficiency evaluation of an innovative three-switch double input DC–DC converter for hybrid vehicle applications was carried out. The converter was used to interface two storages, (e.g., supercapacitor and battery) to the DC link. A refined model was created in MATLAB/Simulink Plecs environment and it was used to compare the traditional four-switch converter (i.e., two DC–DC converters in parallel connection) with the innovative three-switch converter. Loss and efficiency contour maps were obtained for both converters and a comparison between them was performed. A prototype of the three-switch converter was realized and used to validate the simulation thermal model by comparing both efficiency and current waveforms obtained with simulations and experimental tests.
Highlights
The increasing spread of hybrid electric vehicles (HEV) has led to the study and development of new storage systems and storage architectures
On the one hand, reducing the number of switches in multi-input or multi-output converters is a topic of great interest in the technical literature [36,37,38,39], on the other, DC–DC converter efficiency is a key point in hybrid vehicles
It is important to verify that the current waveforms obtained with simulations are in accordance with the current waveforms obtained with the experimental tests
Summary
The increasing spread of hybrid electric vehicles (HEV) has led to the study and development of new storage systems and storage architectures. An innovative converter architecture using only three switches is proposed in [32,33,34,35] (Figure 1b) Such a converter can interface two storage systems with the DC link using a reduced number of switches, but it allows a higher conversion efficiency. On the one hand, reducing the number of switches in multi-input or multi-output converters is a topic of great interest in the technical literature [36,37,38,39], on the other, DC–DC converter efficiency is a key point in hybrid vehicles.
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