Design and Analysis of Brushless Self-Excited Three-Phase Synchronous Generator

Abstract

This paper presents the main features of design, construction, performance analyses and experimental studies of a brushless self-excited three-phase synchronous generator. The basic construction, principle of operation, and exciting characteristics are described. In proposed machine the rotor winding is shorted through diodes and the self-excitation is reached by a slip between rotor and stator winding built with different pole numbers. Computer simulations performed with MATLAB® software were used to verify the mathematical model of the brushless self-excited synchronous generator and the achieved results showed similar behavior with experimental values.

Exciterless Wound-Field Medium-Power Synchronous Machines: Their History and Future

“…The rotor topology is typically coupled with a DC excitation winding, Fig. 3a, but has been used with a harmonic excitation scheme in [28], similar to Fig. 3f but with the reactive load connected to an additional single-phase 6-pole winding.…”

Development and Laboratory Testing of a Self-Excited Synchronous Machines without Permanent Magnets

“…From Equations (15) and (16), it is possible to note that both the amplitude and the frequency of the back EMF increase linearly as the rotor speed moves away from synchronism. Table 3 lists the main rotor equivalent circuit parameters and their measured values.…”

“…In recent times, new solutions have been developed to build up wound-field generators without brushes [16][17][18], by exploiting the space MMF harmonics that are generated by the stator winding in order to obtain the generation field. The main contribution were given by Dajaku [19,20], Aoyama, and Noguchi; the latters developed also a mathematical model for the study, design, and evaluation of the features of these kind of generators [21][22][23].…”