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Practical design considerations for a LLC multi-resonant DC-DC converter in battery charging applications

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5 Author(s)
Musavi, F. ; Dept. of Res. Eng., Delta-Q Technol. Corp., Burnaby, BC, Canada ; Craciun, M. ; Edington, M. ; Eberle, W.
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In this paper, resonant tank design procedure and practical design considerations are presented for a high performance LLC multi-resonant dc-dc converter in a two-stage smart battery charger for neighborhood electric vehicle applications. The multi-resonant converter has been analyzed and its performance characteristics are presented. It eliminates both low and high frequency current ripple on the battery, thus maximizing battery life without penalizing the volume of the charger. Simulation and experimental results are presented for a prototype unit converting 390 V from the input dc link to an output voltage range of 48 V to 72 V dc at 650 W. The prototype achieves a peak efficiency of 96%.

Published in:

Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE

Date of Conference:

5-9 Feb. 2012