Steady-State Analysis of Aircraft D-C Generators

A practical method is developed for obtaining analytical expressions to represent the steady-state electromagnetic characteristics of a d-c generator. The terminal voltage of a separately excited d-c generator can be computed as a function of steady-state conditions of excitation, load, and speed when certain physical and empirical constants of the machine are known. The analysis leads to equations which can be applied to the condition of self-excitation. Applications of this mathematical tool to several aircraft generators indicate an accuracy approximating that of physical measurement when hysteresis effects are neglected.