LLC谐振变换器轻载输出电压稳定性研究  

The Research on Output Voltage Stability of LLC Resonant Converter in Light Load State

作　　者：包尔恒[1] BAO Erheng(Automation Engineering Department,Guangdong Technical College of Water Resources and Electric Engineering,Guangzhou 510925,China)

机构地区：[1]广东水利电力职业技术学院,自动化工程系,广州510925

出　　处：《电子器件》2020年第1期78-81,共4页Chinese Journal of Electron Devices

基　　金：广东省普通高校特色创新项目(2018GKTSCX051)。

摘　　要：LLC谐振变换器在实际应用中,轻载输出电压稳定问题是普遍关注解决的难点问题。对特定条件下增益-频率不单调和变压器副边电压振荡两种常见导致轻载/空载输出电压失调的原因进行分析,提出实用化解决方案并进行了实验验证。另外,分析常见采用打嗝模式解决轻载输出电压稳定问题时纹波较大的原因并提出解决方案和进行实验验证。In practical applications of the LLC resonant converter,the output voltage stability in light load state is a widely concerned problem.The reason of out of control of output voltage under light load and no-load conditions caused by the non-monotonicity of gain-frequency and the secondary side voltage oscillation of the transformer are analyzed,the practical solution is proposed and experimental test is made.In addition,the reason of large output voltage ripple is analyzed when the hiccup mode is used to solve the output voltage stability in light load,the solution is proposed and experimental test is made.

关 键 词：LLC谐振变换器 轻载 单调性 电压稳定 打嗝 

分 类 号：TM46[电气工程—电器]