矩形横截面导体内衰减振荡电流脉冲的趋肤效应
发布时间：2018-10-05 08:35
【摘要】：为了优化设计导通电流脉冲的工件以及制定电流脉冲处理材料的工艺方案,研究电流脉冲通过时电流密度、电磁场等物理量在导体内部的分布情况.根据Maxwell方程组,推导出振荡衰减电流脉冲通过矩形截面金属导体时,电场强度、电流密度、磁感应强度、电磁能密度和Maxwell应力张量在横截面分布的解析解.以电容放电通过碳钢板状试样为例,计算相关物理量的分布情况.结果表明,电流、电磁场的分布存在明显的趋肤效应,表面处的数值远远大于心部,主要分布在距离表面深度不大于趋肤深度的表层区域.电场强度、电流密度、磁感应强度、电磁能密度和Maxwell应力张量都呈现出振荡衰减的变化趋势.通过电流脉冲对45碳钢横截面碳原子作用的不均匀现象验证了趋肤效应的存在.
[Abstract]:In order to optimize the design of the workpiece of the conduction current pulse and to formulate the processing scheme of the current pulse processing material, the distribution of the current density, electromagnetic field and other physical quantities in the conductor when the current pulse passes through is studied. According to the Maxwell equations, the analytical solutions of the distribution of electric field, current density, magnetic induction intensity, electromagnetic energy density and Maxwell stress Zhang Liang in the cross section of rectangular section metal conductor are derived when the oscillating attenuated current pulse passes through the rectangular section of metal conductor. The distribution of related physical quantities was calculated by using capacitor discharge through carbon steel plate specimen as an example. The results show that the distribution of electric current and electromagnetic field has obvious skin effect. The value of the surface is much larger than that of the center, and it is mainly distributed in the surface area where the depth from the surface is less than the depth of the skin. Electric field intensity, current density, magnetic induction intensity, electromagnetic energy density and Maxwell stress Zhang Liang all show the trend of oscillation attenuation. The existence of skin effect is verified by the non-uniform effect of current pulse on carbon atoms in 45 carbon steel cross section.
【作者单位】： 浙江大学浙江省先进制造技术重点实验室;浙江大学流体动力与机电系统国家重点实验室;国网浙江省电力公司电力科学研究院;
【基金】：航空科学基金资助项目(20140876003) 国家自然科学基金创新研究群体资助项目(51221004);国家自然科学基金资助项目(50675200)
【分类号】：TB306
，
本文编号：2252713
[Abstract]:In order to optimize the design of the workpiece of the conduction current pulse and to formulate the processing scheme of the current pulse processing material, the distribution of the current density, electromagnetic field and other physical quantities in the conductor when the current pulse passes through is studied. According to the Maxwell equations, the analytical solutions of the distribution of electric field, current density, magnetic induction intensity, electromagnetic energy density and Maxwell stress Zhang Liang in the cross section of rectangular section metal conductor are derived when the oscillating attenuated current pulse passes through the rectangular section of metal conductor. The distribution of related physical quantities was calculated by using capacitor discharge through carbon steel plate specimen as an example. The results show that the distribution of electric current and electromagnetic field has obvious skin effect. The value of the surface is much larger than that of the center, and it is mainly distributed in the surface area where the depth from the surface is less than the depth of the skin. Electric field intensity, current density, magnetic induction intensity, electromagnetic energy density and Maxwell stress Zhang Liang all show the trend of oscillation attenuation. The existence of skin effect is verified by the non-uniform effect of current pulse on carbon atoms in 45 carbon steel cross section.
【作者单位】： 浙江大学浙江省先进制造技术重点实验室;浙江大学流体动力与机电系统国家重点实验室;国网浙江省电力公司电力科学研究院;
【基金】：航空科学基金资助项目(20140876003) 国家自然科学基金创新研究群体资助项目(51221004);国家自然科学基金资助项目(50675200)
【分类号】：TB306
，
本文编号：2252713
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