计算三维恒定磁场的等效磁荷法

Equivalent Magnetic Charge Method for the Computation of 3-D Static Magnetic Field

本文从磁化强度而出发，利用等效磁荷模型推导了以等效磁荷面密度σ＿ｍ为未知变量的边界积分方程，同时与全标量位为未知变量的边界积分方程进行了对比分析，指出了它们各自的优缺点．实测结果证明了本文的数学模型与所编计算程序的正确性．以此为基础，可以计算工程实际中的电磁装置的场分布和其他所需要的电磁参数．

By using magnetic polarization and equivalent magnetic charge model,the boundary integral equation about equivalent surface magnetic cliarge σ_m is derived.Furthermore,the comparision between the derived integral equation and the integral equation about total scalar potential lias been made,and the strong and weak points ofthe two integral equations are pointed out. Finally,the correctness of the mathematicalmodel and the computation prograni is verificd by test results. Based on these,the magnetic field distribution and other electromagnetic parameters of electromagnetic devicescan be computed.