变压器等效电路中励磁支路问题探讨

在我国的"电机学"教材中,变压器等效电路中的励磁支路一般都是采用励磁电阻和励磁电抗串联的形式,而美版的教材中采用的则是电阻与电抗并联的形式。本文在分析这两种等效电路的基础上,将这两种不同的励磁支路形式进行对比,指出并联型的励磁支路中各参数的物理意义更加明晰,更有利于学生的学习和理解。

Discussion on the Exciting-branch in the Equivalent Circuit of Transformer

The exciting-branch in the equivalent circuit of a transformer is always made up of a exciting resistance in series with a exciting reactance in the Chinese textbook.But it is always composed of a exciting resistance in parallel with a exciting reactance in the American textbook.Both of the two equivalent exciting-branches are analyzed in this paper.A comparison between the two equivalent exciting-branches shows that the parallel exciting-branch has some advantages over the other one.The physical significance of the parameters in the parallel branch is clearer and it is easier for the students to understand and master.