基于扩展描述函数法的双向全桥LLC变换器建模

文章采用扩展描述函数法对双向全桥LLC谐振变换器进行数学建模,建立了其小信号线性动态模型。并在此基础上完成了补偿网络的设计。最后利用Matlab软件对闭环网络进行仿真分析,实验结果显示通过该数学模型设计的闭环控制系统具有良好的动态及稳态性能,证明了通过扩展描述函数法可较为准确的对双向全桥LLC谐振变换器进行数学建模分析。

This paper USES the extension describing function method for two-way arch bridge LLC resonant converter is mathematical modeling, the small signal linear dynamic model is established. Based on the finished design of compensating network. Finally closed loop network to make use of Matlab software simulation analysis, the experimental results show that by the mathematical model for the design of closed loop control system has good dynamic and steady state performance, proved by extending the describing function method can be more accurate to two-way bridge LLC resonant converter for mathematical modeling analysis.