摘要
根据DC/DC变换器的基本原理,在低频、小信号、小纹波3个假设条件下,利用状态空间平均法以及欧拉公式建立了Buck直流变换器的小信号数学模型,采用超前-滞后校正装置对系统进行了串联校正,并利用Matlab软件进行校正辅助分析。在此基础上基于PSIM软件进行闭环控制系统仿真,仿真结果与理论分析一致,表明了该数学模型的正确性以及控制策略的合理性。利用该仿真电路可以模拟实际DC/DC变换电路的运行特性,还可以方便地验证不同的控制策略。
Based on the principle of DC/DC converter,on the premise of low- frequency,small signal and small ripple wave ,the small signal math model of Buck DC/DC converter is established using the state -space averaging method and Euler formula. The lead-lag corrector is used for serial system correction and Matlab software for assistant analysis. Results of closed- loop control system simulation based on PSIM are consistent with the theoretical analysis,showing the correctness of the model and the rationality of the control strategy. The operational characteristics of actual DC/DC converter are effectively simulated and different control strategies verified using the simulation circuit.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第9期73-76,共4页
Electric Power Automation Equipment
基金
陕西省教育厅资助项目(07JK203)~~
