We introduce generally vector potential A and scalar potential φ to discuss the radiation of the electromagnetic wave and use the Coulomb gauge and Lorentz gauge to simplify the equations of electromagnetic field and its solutions. 讨论电磁波的辐射时,通常引入矢势■和标势φ。并采用库仑规范和洛仑兹规范使电磁场方程和求解简单化。
Combined boundary conditions between A ─Φ differential equation and integral equation are derived by applied Coulomb's gauge to eddy current region and free space. 在A&Φ位和库仑规范的前提下,导出了涡流区域微分方程和自由空间积分方程在涡流区边界上的耦合条件。