摘要
本文探讨建立表征磁性材料在磁场中所受磁场力数学模型的方法。首先 ,介绍电磁场理论中基于虚功原理导出的磁场力的一般数学表达式 ;然后 ,基于电力设备磁路的对称性给出其磁场力简化数学模型 ;最后 ,给出磁准静态场和正弦交变电磁场条件下的铁磁质所受磁场力的数学模型。这些数学模型的建立为定性和定量分析大型电力变压器铁心及其它电力设备磁路由于磁性材料中存在涡流而产生的振动和噪声奠定了基础。
This paper focuses on mathematical model of magnetic forces in magnetic materials under magnetization.First,general mathematical expression of magnetic forces is presented according to theory of electromagnetic fields.Then,based on the symmetry of magnetic circuit of large power equipments,its simplified mathematical model of magnetic forces is discussed.At last,two kinds of mathematical model,under different types of magnetization,are established.The models,given in this paper,can be used to analyze vibration and noise caused by eddy current in magnetic circuit of power equipments.
出处
《噪声与振动控制》
CSCD
2002年第4期10-11,15,共3页
Noise and Vibration Control
