宽输入LLC谐振变换器多电平控制策略

发布时间：2018-05-12 09:11

本文选题：宽范围输入 + 高效率　；参考：《电工技术学报》2017年04期

【摘要】：为了满足对宽范围输入电压适应能力与高效率的要求,通过对三电平LLC谐振变换器的控制策略进行调整,得到一种多电平工作模式半桥LLC,该变换器可根据输入电压大小工作在两种电平模式,在不改变谐振元件参数的前提下将输入电压适应范围扩大一倍。对LLC变换器的电压增益特性及功率损耗进行分析,明确了其输入电压适应范围的限制因素。通过分析LLC变换器多电平工作模式及其对输入电压适应范围的影响,确定了多电平工作模式的控制策略。仿真和实验结果证明了多电平工作模式半桥LLC的宽输入适应性以及高效性。
[Abstract]:In order to meet the requirement of wide range input voltage adaptability and high efficiency, the control strategy of three-level LLC resonant converter is adjusted. A multilevel operation mode half-bridge LLC converter is presented, which can double the adaptive range of input voltage without changing the resonant component parameters according to the input voltage. The characteristics of voltage gain and power loss of LLC converter are analyzed, and the limiting factors of the adaptive range of input voltage are determined. By analyzing the multilevel operation mode of LLC converter and its influence on the adaptive range of input voltage, the control strategy of multilevel operation mode is determined. Simulation and experimental results show the wide input adaptability and high efficiency of multilevel half-bridge LLC.
【作者单位】：哈尔滨工业大学电气工程及自动化学院;青岛科技大学自动化与电子工程学院;
【基金】：台达电力电子科教发展基金资助项目(DREG2011006)
【分类号】：TM46

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