基于交流链接技术的LLC谐振变换器数字控制方案  

Analysis of Digital control Scheme for LLC Resonant Converters Based on AC Link Technology

作　　者：张家瑜 张政权[1] 刘庆想[1] ZHANG Jiayu;ZHANG Zhengquan;LIU Qingxiang(School of Physical Science and Technology,Southwest Jiaotong University,Sichuan 614203,China)

机构地区：[1]西南交通大学物理科学与技术学院,四川614203

出　　处：《电子技术（上海）》2023年第4期22-25,共4页Electronic Technology

摘　　要：阐述基于交流链接技术的LLC谐振变换器数字控制方案。与传统的AC-DC变换器相比,不需要中间储能的交流链接技术(AC-Link)与LLC谐振可以让电源在保持高功率因数和功率密度的同时,具备宽增益范围。针对基于AC-Link技术的LLC谐振变换器由于控制策略计算难度较大,限制了变换器工作频率的问题,探讨以TMS320F283xS芯片作为DSP控制核心,设计了一套运用于变换器的数字控制方案,并使用控制率加速器(CLA)进行了优化。通过实验平台对所提出的数字控制方案进行了验证。This paper expounds the digital control scheme for LLC resonant converters based on AC link technology.The AC-Link technology and LLC resonance provide a high power factor and power density while keeping a wide gain range compared to conventional AC-DC converters.It designs a digital control scheme applied to the converter using the TMS320F283xS chip as the DSP control core,and optimizes it using a Control Law Accelerator(CLA),in response to the problem that the LLC resonant converter based on AC-Link technology limits the operating frequency of the converter due to the difficulty of calculating the control strategy.The proposed digital control scheme is verified by the experimental platform.

关 键 词：谐振变换器 数字控制 DSP AC-DC AC-Link LLC谐振 状态轨迹控制 

分 类 号：TN86[电子电信—信息与通信工程]