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

Author

Chun-Liang Liu ; Yi-Hsun Chiu ; Yi-Feng Lo ; Shun-Chung Wang ; Yi-Hua Liu

Author_Institution

Dept. of Electr. Eng., NTUST Taipei, Taipei, Taiwan

fYear

2013

fDate

22-25 April 2013

Firstpage

804

Lastpage

808

Abstract

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.

Keywords

battery chargers; battery powered vehicles; digital control; load flow control; resonant power convertors; CC charging algorithm; LEV; LLC resonant converter; battery charger; battery charging application; constant current; digital controller; light electrical vehicle; load condition; voltage condition; Algorithm design and analysis; Batteries; Current measurement; Finite impulse response filters; Pulse width modulation; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems (PEDS), 2013 IEEE 10th International Conference on

Conference_Location

Kitakyushu

ISSN

2164-5256

Print_ISBN

978-1-4673-1790-0

Electronic_ISBN

2164-5256

Type

conf

DOI

10.1109/PEDS.2013.6527127

Filename

6527127