全电容回路电容电压初始值的计算

在电路瞬态分析中经常会遇到换路后形成由全电容或同时包含理想电压源组成的全电容回路情况。由于换路瞬间电容电压不再是连续函数，即换路时uc会发生跳变，所以此时换路定则失效，这使得确定换路后电容电压的初始值变得复杂。本文依据电容元件的伏安关系导出了计算全电容回路电容电压初始值的等效电路分析法，并将这种方法推广到由任意多个电容构成的全电容回路的情况。最后通过举例说明利用该方法可使复杂的全电容回路初始值的计算变得轻而易举。

Calculating the Initial Voltage Value of the Capacitance in the Full Capacitance Circuit

At the circuit transient analysis, it usually changes to be full capacitance circuit structured with full capacitance and ideal voltage source after circuit switching. When the rule of switching circuit no longer has any effect, the calculation of the initial voltage value of the capacitance becomes to be difficult, for the instantaneous voltage of the capacitance turns into non-continuous function. This article introduces the equivalent circuit analysis for calculating the initial voltage value of the capacitance in the full capacitance circuits on the basis of the volt-ampere relationship and generalizing to full capacitance circuit consisting of unlimited numbers of capacitor. Eventually, with example, we demonstrate the computation of the initial voltage value in the complex full capacitance circuit can be quite easy.