交变电磁场对电容的影响

在静电场中电容器的电容决定于电容器的结构、几何状态、尺寸以及两极板之间材料的介电常数。但是在交变电磁场中,电容器的电容和多种因素有关。本文运用叠加原理,从麦克斯韦方程的积分形式出发推导出在交变电磁场中储藏在电容器中的电场能量,并且指出了决定电容器电容数值的因素。

The Influence of Alternating Electromagnatic Field on Capacitance

In a statistical electric field, the capacitance of a capacitor is dependent on the structure, geometrical shape, size of the capacitor and on the dielectric constant of material in the space between two plates. But in an alternating electromagnatic field, the capacitance of a capacitor is dependent on many factors. The energy of electric field stored in the capacitor placed in an alternating electromagnatic field is concluded by using the principle of superposition and by starting with Maxwell equations.