用坡印亭矢量统一推导交流和直流电机的电磁转矩公式

A Formula of Electromagnetic Moment of AC and DC Electrical Machinery Derived from Poynting Vector

本文运用坡印亭矢量,推导了电机电磁转矩的一般公式,并进一步统一导出了交流电机和直流电机电磁转矩的常用计算公式。

In this paper, the general formula of electromagnetic moment in electrial machinery is derived from Poynting vector, and the common calculating formula of electromagnetic moment in AC electrical machinery and in DC electrical machinery is further derived.