A Flexible Resonant Converter Based Battery Charger with Power Relays

被引：6

作者：

Wei, Yuqi ^{[1
]}

Mantooth, Alan ^{[1
]}

机构：

[1] Univ Arkansas, Dept Elect Engn, Fayetteville, AR 72701 USA

来源：

2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2021年

关键词：

Battery charger; resonant converter; narrow switching frequency; LLC CONVERTERS; DESIGN;

D O I：

10.1109/ECCE47101.2021.9595497

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Battery charger applications require constant current (CC) charging stage and constant voltage (CV) charging stage. From the output voltage profile, the converter is required to work in a wide gain range. Due to wide switching frequency operation range, the performances for traditional LLC converter are degraded. The circulating current and conduction loss for traditional LLC converter are increased to satisfy the voltage gain requirement. To improve the converter performance, a flexible resonant converter topology is proposed. With the aid of power relays, the proposed converter is operating as traditional LLC converter with resonant frequency operation during CV charge stage. During CC charging stage, the LCL-T resonant tank is connected in the secondary side to provide constant output current. Thanks to the high accuracy characteristics of two resonant tanks, almost fixed frequency operation is achieved to satisfy the charging profile. Comparisons have been made with traditional LLC converter to demonstrate the advantages. Experimental results are provided to validate the proposed converter.

引用

页码：1675 / 1680

页数：6

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