摘要
分析了基于平均电流控制的PFC Boost变换器的工作原理,采用Simulink模型建立了主电路的开关模型,对PFC变换器进行了数字仿真。仿真结果说明了在PFC Boost变换器中同时存在两种不同时标下的不稳定现象,最后利用Matlab软件中的S函数建立系统状态空间平均模型得到了低频分岔图,证明了所建立仿真模型的正确性。所建立的PFC变换器模型为精确分析电力电子变换器在参数变化时的动态性能提供了有效工具。
The operation theory of PFC Boost Converter based on average current control was analyzed. The switch model of PFC Converter was built by Simulink and S-Function, and the simulation of converter was carried out. The result of simulation shows that there is two different time scale instability in PFC Boost Converter based on average current control. The bifurcation map was derived from system model by S-Function in Simulink. The result also verifies the correction of the model of system in PFC. A reliable tools was proposed for studying dynamics of the power electronics system accurately under variation of some parameters in circuit based on this converter model.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2007年第23期5518-5523,共6页
Journal of System Simulation