电磁装置非线性动态过程的数值计算

Numerical Calculation of the Non-LinearDyuamic Process in Electromagnetic Devices

本文阐述了一种直接耦合模型。可以用于分析由电压源激励的电磁装置中二维非线性暂态磁场,提出了计算电磁装置动态特性的有关数值方法。在这方法中,对机械运动、涡流、激磁电路和磁性材料的非线性问题进行了综合考虑。这一直接耦合方法可用于求解暂态磁场。采用将非对称系数矩阵转化为对称带状加边矩阵的数值技术可以大大减少所需计算机存储量和CPU时间。文中给出了对制动电磁铁的应用实例。

In this paper, a direct coupling model is developed that can be used in ana- lyzing two-dimensional nonlinear transient magnetic field in electromagnetic devices excited by voltage source. The relevant numerical method is presen- ted for calculation of the dynamic characteristic of the devices. In the me- thod the mechanical movement, eddy currents, exciting electric circuit and nonlinear problem of the magnetic material are taken into account. The di- rect coupling method is used for solving the transient magnetic field. The nu- merical technique that turns the unsymmetrical coefficient matrix into a sym- metrical and banded one added with edges has reduced considerably the com- puter memory capacity needed and CPU time. An example for application is given for a brake electromagnet system.