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An LLC Resonant DC–DC Converter for Wide Output Voltage Range Battery Charging Applications

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5 Author(s)
Fariborz Musavi ; Delta-Q Technologies Corporation, Burnaby, Canada ; Marian Craciun ; Deepak S. Gautam ; Wilson Eberle
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In this paper, resonant tank design procedure and practical design considerations are presented for a high performance LLC multiresonant dc-dc converter in a two-stage smart battery charger for neighborhood electric vehicle applications. The multiresonant 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 48-72 V dc at 650 W. The prototype achieves a peak efficiency of 96%.

Published in:

IEEE Transactions on Power Electronics  (Volume:28 ,  Issue: 12 )