含非线性各向异性介质静磁场的综合分析法

A Combined Method for Analysing Magne tostatic Field with Nonlinear and/or Nonisotropic Media

本文给出了一种分析在非线性、各向异性媒质存在下的静磁场分布的计算方法。该法诉诸于全局标量磁位与局部矢量磁位的结合,以及将(?)分解法与牛顿—拉夫逊法结合起来求解非线性矩陈方程。因此,与通常办法相比,可以节省许多计算时间和费用。文章最后,提供了一个将此法用于大型汽轮发电机端部磁场计算的实例。其结果表明,这种方法对于计算非线性静磁场或似稳场是非常有效的。

This paper presents a method to analyse distribution of magnetostatic field, possibly involved with nonlinear and/or nonisotropic media.This method resorts to the combination of global magnetic scalar Potential with locat auxiliary magnetic vector potential and the combination of LU decomposition with Newton Raphson iteration,therefore,results in a great reduction of computation time and cost, compared with conventional methods.An example of application of the method to computation of magnetic field in the end region of a large turbogenerator, shows that the method is specially efficient to nonlinear magnetostatic field analysis.