基于能量守恒定律的载流体内自感分析

An Analysis of Self Inductance Based on the Energy Conservation Law

本文针对载流体内自感的计算,给出了严格的分析和推证。分析结果表明:载流体内磁链的物理本质正是能量守恒定律在电磁场领域的集中表现。本文将连续电流情形下载流体的内自感、磁场能量以及法拉第电磁感应定律的本质紧密相连,解决了"电磁场"课程教学中的一个难题,也对正确理解内磁链和内磁通的本质,提高理论素养大有裨益。

Focused on the calculation of the self inductance of a conductor, this paper gives a rigorous analysis and deduction, which shows that the physical nature of the self-conductor flux is a concentrated expression of the law of energy conservation in the electromagnetic fields. This comment can connect the inner conductance with magnetic energy as well as the law of electromagnetic induction closely. So an obstacle in the electromagnetic teaching can be overcome. This is also useful to understand the physic concept of both inner magnetic flux and inner magnetic flux linkage, so as to up-grading the theoretic attainments.