摘要
从Maxwell方程出发 ,推导并计算了连续交变磁场和调幅交变磁场作用下 ,圆柱形金属液中电磁力密度在半径方向上的分布及其随时间的变化情况。发现在连续及调幅磁场情况下 ,电磁力频率均以原输入电磁场频率的两倍变化 ,且在调幅磁场的线性上升段和下降段 ,电磁力幅值的变化近似为二次抛物线形 ,在调幅磁场的恒值段则与连续施加时一样。这为合理设计电磁连铸时的调幅磁场打下基础。
The distribution of electromagnetic force along with radius and time in cylinder shape liquid metal under continuous and amplitude modulated alternating magnetic field was deduced and calculated based on Maxwell equation. It is found that the frequency of electromagnetic force is the twice of the magnetic field under both continuous and amplitude modulated condition, and its amplitude changes in a square parabola type while amplitude of magnetic field changes in a linear type.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第z1期30-35,共6页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目 ( 5 97340 80
5 99740 17)
关键词
调幅磁场
电磁连铸
电磁力
amplitude modulated magnetic field
electromagnetic continuous casting
electromagnetic force
