摘要
节点磁矢量位法进行变压器三维电磁场数值分析时存在漏磁和计算问题。通过对节点法与棱边法的算法区别,根据实际变压器参数建立模型,采用经典ANSYS二维轴对称单元、三维节点元和棱边元,研究铁磁材料的磁场分布和磁通连续性。分析节点法计算不同模型时产生的误差,并得出结论,节点法计算变压器电磁场时受材料属性和模型条件影响,误差较大,因而不具适用性,棱边法则克服了节点法存在的问题。结合改进方法讨论其计算效果,同时得出结论,棱边法处理变压器三维连通磁场模型时,在精度、规模和效率方面均优于节点法。
Flux leakage and computing problems may be caused by the nodal vector potential fem in the 3D e- lectromagnetic analysis of transformer. The algorithmic differences between node fem and edge fem are introduced in this paper. Then the classical Plane53#, Solid 97# and Solid117# elements in software of ANSYS are used. With magnetic and flux continuity analysis of ferromagnetic material in different models of actual transformers, the weakness of applicability and accuracy in the nodal vector potential fem are summarized by consid- ering impacts of material characteristics and modeling condition,which can be settled by edge fern. Improvements are carried out and the effects are discussed. The node fern can not be fit for 3 D electromagnetic calcula- tion of transformer with the shortcomings above. Computation and case study are given to verify the result. It＇ s concluded that the ledge vector fem takes advantages of precision, scale and efficiency while dealing with multiconnected electromagnetic field of transformer.
出处
《东北电力大学学报》
2014年第2期21-26,共6页
Journal of Northeast Electric Power University
基金
东北电力大学博士科研启动基金项目
关键词
三维电磁场分析
棱边法
矢量磁位
漏磁
3-D electromagnetic analysis
Ledge vector finite element method
Vector magnetic potential
Fluxleakage
