电容端电压跃变条件分析

Analysis about Leap-transition Conditions of Electronic Capacitor′s Start Voltage

动态元件由于具有存储能量的作用,因此在电路的结构或元件的参数发生变化和换路时,其端电压和端电流是不能突然改变的,在电路理论中这一性质可以表述为:当电容元件的初始电压为零或者电感元件的初始电流为零时,在换路的一瞬间,可以把电容元件看成一条短路线,把电感元件看成一个开路端(换路定理)。但是在某些特殊情况下换路定理并不成立,本文以电容元件为例,对此进行了分析。

Because the dynamic electronic component can store electronic power, its terminal voltage and start current can＇t be changed suddenly when the electronic circuit structure or electronic parameter changes or the circuit changes. In electronic theories,this point means that if the start voltage of the capacitor＇s component is zero, we may regard this component as a short circuit at moment the circuit changes （it is called circuit change theorem）. However, this paper discusses that the circuit change theorem is not exist under certain special situations.