Design and implementation of a digitally-controlled LLC resonant converter for battery charging applications

In this paper, a digitally-controlled LLC resonant converter is developed for LEV battery charging applications. LLC resonant converter boasts the advantages of high efficiency and wide input voltage range; therefore is a suitable candidate for medium power battery charger. To enhance the performanc...

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Published in2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS) pp. 804 - 808
Main Authors Chun-Liang Liu, Yi-Hsun Chiu, Yi-Feng Lo, Shun-Chung Wang, Yi-Hua Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2013
Subjects
Algorithm design and analysis
Batteries
Current measurement
Finite impulse response filters
Pulse width modulation
Voltage measurement
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Summary:In this paper, a digitally-controlled LLC resonant converter is developed for LEV battery charging applications. LLC resonant converter boasts the advantages of high efficiency and wide input voltage range; therefore is a suitable candidate for medium power battery charger. To enhance the performance of the developed battery charger, five-step constant current (CC) charging method is implemented in the proposed digital controller. Experimental results show that the proposed charger can successfully realize the five-step CC charging algorithm, and the measured conversion efficiencies of the designed LLC resonant converter are all higher than 88% under all output voltage and load conditions.
ISBN:9781467317900
146731790X
ISSN:2164-5256
DOI:10.1109/PEDS.2013.6527127