The Design On Deputy Exciter Of Three-stage Brushless Synchronous Generator

Three-stage brushless synchronous generator is composed by the main generator, mainexciter and deputy exciter as well as the corresponding power electronic devices, It is alsoknown as the three-stage brushless excitation system. The three generators are connected tothe same coaxial, The main exciter is used as excitation power of the main generator, andthe deputy exciter supply excitation to the main exciter, which make a brushless excitationsystem, and the generator get safe and reliable operation, as we ll as low maintenance costs.Besides, the excitation can be adjusted immediately in the case of speed changing, as theresult, the power supplied by the generator have high quality, which is important to improvethe performance of generator.This paper design a deputy exciter of the brushless synchronous generator, as we allknow, the permanent magnet machine can save materials, and reduce the size of themachine, besides, it needs no additional exciter. As a result, this paper design the deputyexciter as a permanent magnet synchronous generator.This paper propose the standard of the design of deputy exciter, which base on thestudy of the basic institutions, working principle, electromagnetic relations of permanentmagnet synchronous generator. Then, the author designed a Calculation program of PMSG,which was used to design a deputy exciter with small power. After that, the author useAnsoft to simulate the operational state in different conditions of several programs, andselect the best one base on the analysis of harmonics of Flux density and power quality.This paper has practical significance for the standardized design of the deputy exciter,which also laid the foundation for further research of brushless synchronous generator.