LLC谐振变换器的分析和设计  

Design and Analysis of LLC Resonant

作　　者：徐东[1] 高文根[1] 王金桥 

机构地区：[1]安徽工程大学检测技术与节能装置安徽省重点实验室,安徽芜湖241000 [2]奇瑞新能源汽车技术有限公司,安徽芜湖241000

出　　处：《重庆理工大学学报（自然科学）》2018年第1期166-173,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：国家863计划资助项目(2015AA050608);国家科技支撑计划资助项目(2015BAG17B04);安徽省高校自然科学研究重点项目(KJ2017A107)

摘　　要：正确理解开关稳定电源的工作机制以及合适的建模方法是保证其准确运行的基础。首先,针对LLC谐振变换器的非线性离散的动态系统,剖析了其工作过程,详尽地总结出关键元器件的运行模态。然后,运用等效电路法创建系统的频域模型,得到控制信号即开关频率与开关功率变换器输出的传递函数。为达到稳态要求和系统响应速度的要求,使用比例-微分补偿网络进行补偿。最后,利用S函数设计VCO实现了互补信号,设计了一种控制策略并在Matlab的仿真环境中搭建LLC闭环仿真平台,验证了设计的可行性。The important parts of the loop control of switching converters are the operating principle and system modeling. Firstly,it analyzed the working process of the nonlinear discrete dynamic system of LLC resonant converters and the working state of the key components are summarized in detail. Secondly,the small signal mathematical model of the system is established by equivalent circuit method,and obtained the transfer function of the switching frequency and the output voltage.By the use of the proportional-derivative compensation network to compensate to meet the requirements of stable state and the speed of system response. Finally,it verified the rationality of the small signal mathematical model and the design of compensation network by building and it simulated the closedloop system of LLC resonant converter in the MATLAB environment of Simulink.

关 键 词：LLC谐振变换器 等效电路法 比例-微分补偿 仿真分析 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]