线性动态电路初始值的研究  

Study of the initial value in the linear dynamic circuit

作　　者：朱晓萍[1] 王胜辉[1] 王秀平[1] 

机构地区：[1]沈阳工程学院电气系,辽宁沈阳110136

出　　处：《大学物理》2013年第4期12-15,共4页College Physics

基　　金：辽宁省教育厅科学研究计划项目(05L270);沈阳工程学院科技基金项目资助

摘　　要：初始值是表征储能元件物理行为的重要因素.因此,储能元件初始值的确定对研究动态电路的分析至关重要.本文阐述了研究初始值的意义,通过对5个典型的RL常态电路、病态电路的电感器初始电流及冲激电压的分析,系统、深入地探讨了RL常态电路、病态电路在有界电源激励下的初始值的确定,并得出在病态电路中的电感器电压必是冲激电压的重要结论和4种RL病态电路电感电流初始值的求解方法,即首先设电感电压为冲激函数,然后根据磁链守恒定律或纯电感器子网络列写KVL方程确定电感电流初始值及电感冲激电压.从理论上更深入了对RL病态电路初始值乃至电路暂态响应的认识,解决了RL病态电路初始值求解难的问题.Initial value is an important factor denoting physical behavior of stored-energy element. Thus the determination of the initial value is also very important for analyzing the dynamic circuit. After introducing the sig- nificance of the research for initial value, this paper describes the initial value of RL normal or morbid circuit by bounded source stimulus amply and thoroughly through analyzing inductor initial current and impulse voltage of five typical RL normal and morbid circuits. Moreover, the significant conclusion is drawn that inductor voltage must be impulse voltage. The solution of inductor initial current for four RL morbid circuits can be gained, namely, suppo- sing voltage is impulse voltage, then it solutes the initial value according to the conservation law of magnetic linkage or the KVL equations of the inductor subnet. It enhances the cognition for RL morbid circuit initial value and tran- sient response in theory, and solves the difficulty of gaining the initial value in RL morbid circuit.

关 键 词：常态电路 病态电路 有界激励 初始值 

分 类 号：O441[理学—电磁学]