Analysis of a Hybrid Excitation Synchronous Generator Using Three-Dimensional Magnetic Field Finite Element Analysis

Abstract

This paper presents the study about a novel structure hybrid excitation synchronous generator (HESG), which consists of a permanent magnet part as the major component, and an electrically-excited part as the assistant component, and hence possesses the advantages of both the PM and electrically-excited generators. To accurately determine the machine parameters, three-dimensional (3-D) finite element analysis is conducted to solve the magnetic field distribution, which is quite complicated and 3-D, particularly in the electrically-excited part. An equivalent electrical circuit is derived to calculate the generator performance, such as the external characteristic or the relation between the output voltage and the load. A HESG prototype has been constructed and the experimental results validate the theoretical calculations.