Analysis of Brushless Three-Phase Synchronous Generator Without Exciter

Abstract

Recently a demand for small-capacity generators is increasing as electric sources in small ships and automobiles or as portable electric sources driven by engines.
It is desired that the structure of small-capacity generators is simple and robust, and that the generators are highly reliable, easily maintained and controlled.
This paper describes an analysis of the original brushless synchronous generator without exciter. The output voltage can be adjusted in the wide range by controlling the stator DC current. To analyze the characteristics of this generator, the finite element method is applied. It is found that the results of theoretical analysis agree well with the experimntal results.