电动机和发电机中安培力做功及其微观分析

利用由一般到特殊的思维,分析出载流导线或载流线圈在稳恒磁场中运动时,安培力做功等于电流乘以通过回路所包围面积内的磁通量的增量Φ,在此基础上探析电动机和发电机中安培力做功和能量转换的关系.阐述安培力做功的微观实质,指出洛伦兹力的一个分力做正功时,它的另一分力必然做负功,这样洛伦兹力总体仍不做功.得出洛伦兹力虽然不做功,但是它在能量转换过程中起着非常关键的"中介"作用.

Amprer force applying work and the microcosmic analysis on it in electric motor and generator

Applying the deductive method,a conclusion is come that when current-carrying wires move in the magnetic field,ampere force applying work equals current multiplied by the incremental of the flux in the area surrounded by loop.Analyzes the view of ampere force applying work and energy conversion in electric motor and generator.Besides this,the microcosmic crux of ampere force’s applying work is set forth.When one component of lorentz force does work,another one certainly does negative work,which results in that lorentz force doesn’t do work.In conclusion,though lorentz force doesn’t work,it plays a crucial intermediary role in the energy conversion process.