An Interleaved LLC Resonant Converter Operating at Constant Switching Frequency

被引：185

作者：

Hu, Zhiyuan ^{[1
]}

Qiu, Yajie ^{[1
]}

Wang, Laili ^{[1
]}

Liu, Yan-Fei ^{[1
]}

机构：

[1] Queens Univ, Dept Elect & Comp Engn, Kingston, ON K7L 3N6, Canada

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 06期

关键词：

Resonant power conversion; switched-mode power supplies; BURST MODE; DESIGN;

D O I：

10.1109/TPEL.2013.2273939

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The interleaving technique is necessary for LLC resonant converters to achieve high power level. The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose regulation in individual phases if all the phases are operating at the same switching frequency, causing load sharing problem. Existing load sharing solutions for interleaved LLC converters all have limitations. In this paper, a switch-controlled capacitor (SCC) modulated LLC converter (SCC-LLC) is presented to solve the load-sharing problem. With constant switching frequency, interleaving and phase shedding can be achieved. A 600-W, two-phase interleaved constant frequency SCC-LLC prototype is built to verify the feasibility and demonstrate the advantages.

引用

页码：2931 / 2943

页数：13

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