摘要
介绍了LLC谐振变换器拓扑的基本原理,采用基波近似(FHA)的方法对LLC拓扑的等效电路模型进行分析并得出了电路的直流增益特性,讨论了主要参数对电源系统性能的影响。通过一个400 W的LLC谐振变换器的实例得出其比较理想的优化参数,为了更好地减小损耗,采用了同步整流技术。通过Pspice软件进行仿真,得出的仿真结果验证了其正确性和可用性。
The basic principle of the LLC resonant converter topology was introduced.The equivalent circuit model of the LLC topology was analyzed by using fundamental harmonic approximation （FHA） method and the DC gain characteristics of the circuit were obtained.The influences of the main parameters on the performance of the power system were discussed.The ideal optimizing parameters were obtained through a 400 W LLC resonant converter example.In order to reduce loss,synchronous rectification technology was adopted.The correctness and usability of the design is proved by the simulation result of Pspice software.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第8期1558-1559,1586,共3页
Chinese Journal of Power Sources
关键词
LLC谐振变换器
基波近似
同步整流
PSPICE仿真
LLC resonant converter
fundamental harmonic approximation
synchronous rectification
Pspice simulation
