用有限元法计算起重电磁铁中三维温度场和磁场

本文使用有限元法对起重电磁铁中的三维温度场和三维磁场进行了计算。电器产品中三维磁场由旋度旋度方程给定,三维温度场由泊松方程所控制,它们的泛函方程可用算子方程的内积表达式得到。文中给出了温度场和磁场的计算结果,用计算机自动绘出了场的分布图,线圈平均温升及电磁吸力的计算是准确的。利用补色体视投影原理,我们还绘制了起重电磁铁内部空间B值分布的立体投影图。

3D FEM for Temperature Field and Magnetic Field in Lifting Magnet

In this paper, three dimensional finite element method is used for calculating the distributions of both temperature field and magnetostatic field in the lifting magnet. In electrical apparatus 3D nonlinear magnetostatic field problem can be defined by the curl-curl equation, and 3D temperature field can be governed by Poisson equation. Their general formulations of functional can he obtained by means of scalar product formula of operator equations. Finally, tyro kinds of the field distributions in the lifting magnet are illustrated, and lifting force is calculated. Making use of the complementary colour stereoscopic mathematical model. Wc draw a vivid stereoscopic diagram of field distribution.