开关电源变换器的小信号建模设计  

Small Signal Modeling and Design for Switching Power Supply Converter

作　　者：冯丹[1] 任宏滨[1] 宁飞[2] 张兴[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051 [2]西北工业大学自动化学院,陕西西安710072

出　　处：《计算机仿真》2015年第11期141-145,284,共6页Computer Simulation

摘　　要：针对开关电源变换器系统稳定性的问题,建立开关电源关键设备DC/DC变换器的小信号模型,以单端反激变换器为例,采用状态空间平均法和开关元件平均模型法建立非理想条件下的数学模型,并用两种建模方法在MATLAB平台上建立模型进行仿真。两种方法的仿真波形与实际电路模型输出波形基本一致,通过单端反激式开关变换器实物实验,验证了两种建模方法的实用性。说明用小信号理论建立的变换器模型合理,对变换器优化设计有较大参考意义。According to the stability analysis of switching power converter system, a small signal model of switch power supply＇ s key devices DC/DC converter is established. By taking the flyback converter as an example, a mathematical model of non-ideal conditions is established by using the state space average method and switching element average model method, two kinds of modeling method process are described in detail and simulated of model with MATLAB. The simulation waveform of two modeling methods and the output waveform actual of circuit model are basically consistent. Through the flyback switching converter experiment, the practicality of two kinds of modeling methods is verified, which explains the converter small signal models are reasonable.

关 键 词：非理想单端反激变换器 状态空间平均法 开关元件平均法 小信号模型 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]