任意充磁方向的三维永磁磁场的数值解法

The solution of 3D permanent magnetic fields having arbitrarily magnetizing direction

给出了任意充磁方向的三维永磁磁场的标量位与矢量位相结合的Ａ－Ψ方法有限元离散格式，并以软件实现。以 ＭＲＩ主磁场永磁体的设计为例对使用 Ａ－Ψ方法和单独使用磁矢量位（Ａ）算法与标量位（Ψ）算法进行了比较，计算结果与实测结果进行比较表明Ａ－Ψ法为最佳。开发了集Ａ、Ψ、Ａ－Ψ三种求解方法于一体的三维永磁磁场有限元计算软件包。

The A-Ψ method is used in computation of 3D permanent magnatic field having arbitrarily magnetizing direction. The software package is developed and used to calculate the main magnetic fields in MRI system. Comparing the results of three methods with the test, the A-Ψ method is the best.