平行双线系统电荷面密度的解析分析

The Analysis of Surface Density of Charge in Parallel Dual System

平行双线传输系统上的电荷面密度的分布在现有教科书上都没有给出。本文给出了平行双线系统电荷面密度表达式,并证明了电荷面密度在两圆柱界面的最靠近处最大,从而克服了在讲授这一问题时只能作定性分析的缺陷。本文不仅能让学生清晰地理解结论,同时也定量地给出了平行双线系统周围的场分布,这对分析双线电力系统电磁干扰具有重要的工程意义。

The analytical calculation on electric charge density about parallel two-wire system hasnˊt been given in the existing textbook. Based on the analysis,this paper provides the functional relation of electric charge density in parallel dual system,and proved that the maximum value of electric charge density is in the two closest to the circu-lar cross section,thus overcame the problem that we can just give the course in microscopical aspect in the departed classes. The significance of this paper not only makes the students understand the conclusion more clearly,but also provides the distribution of electric field around parallel dual system quantitatively. It also has important engineer-ing significance for the analysis to electromagnetic interference ofweak signal system produced by double power sys-tem.