ON/OFF Control of a Modular DC–DC Converter Based on Active-Clamp LLC Modules
ON/OFF Control of a Modular DC–DC Converter Based on Active-Clamp LLC Modules
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DOI：
10.1109/tpel.2014.2345793
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发表时间：
2015-07
影响因子：
6.7
通讯作者：
Hien Nguyen;R. Zane;D. Maksimović
中科院分区：
文献类型：
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作者：
Hien Nguyen;R. Zane;D. Maksimović
本文研究了包含多个有源钳位LLC谐振模块并联工作的DC-DC系统的通断控制。该结构和通断控制方法产生了高的整体效率和快速的暂态响应。介绍了两种转换器模型：1)高频模型，用于确定实现快速开/关控制的门控时序；2)平均模型，用于辅助系统控制环路设计。在由两个1-MHz、24-3.3V、5W有源钳位LLC模块组成的样机上进行了实验，验证了模型和开关控制方法的正确性。比较了PI和PID系统控制器的性能，并通过对多达20个模块的系统进行仿真，分析了电容器的大小。
This paper studies ON/OFF control of a dc-dc system that contains multiple active-clamp LLC resonant modules operating in parallel. The architecture and the ON/OFF control method yield high overall efficiency and fast transient responses. Two converter models are introduced: 1) a high-frequency model to determine a gate timing sequence that enables fast ON/OFF control, and 2) an averaged model to assist in the system control loop design. The models and the ON/OFF control method are verified by experiments on a prototype consisting of two 1-MHz, 24-3.3-V, 5-W active-clamp LLC modules. The performance of PI and PID system controllers is compared, and capacitor size is analyzed by simulations on systems containing up to 20 modules.