绕组折合的必要充分条件

系统阐述了变压器和感应电机中绕组折合的目的、方法、原则和结果。强调指出了绕组折合的原因，其必要而又充分的唯一条件是磁势不变，并据此得到折合前后复电磁功率必然保持不变的结果，进而把磁场耦合的电路折合成单纯的合并等值电路来分析。

ESSENTIAL AND ABUNDANT CONDITION OF WINDING-REFERRING

This article systematically describs the purpose, method, principle and result of windingreferring in transformer and induction machine. Moreover. stress indicating the principle ofwinding-referring, its essential and abundant only condition is magnetomotive force unchangableness. From this point, it results in that the complex electromagnetic power logicallyremain unchanged before and after referring. Further the coupling circuit with magnetic fieldis referred to pure combined equivalent circuit for analysing.