Design Method for Variable Frequency Brushless Synchronous Generators

Yongjie Wang, Huizhen Wang, Weifeng Liu, Qin Wang and Xing Zhao
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Yongjie Wang: Center for More-Electic-Aircraft Power Systems, Nanjing University of Aeronautics and Astronautics, Nanjing 211006, China
Huizhen Wang: Center for More-Electic-Aircraft Power Systems, Nanjing University of Aeronautics and Astronautics, Nanjing 211006, China
Weifeng Liu: Center for More-Electic-Aircraft Power Systems, Nanjing University of Aeronautics and Astronautics, Nanjing 211006, China
Qin Wang: Center for More-Electic-Aircraft Power Systems, Nanjing University of Aeronautics and Astronautics, Nanjing 211006, China
Xing Zhao: Department of Electronic Engineering, University of York, York YO10 5DD, UK

Energies, 2022, vol. 15, issue 8, 1-20

Abstract: Brushless synchronous generators, which have the structure of three-stage generators to realize brushless excitation, are the most commonly used aero-generators. With the development of more electric aircraft technology, the output frequency of aero-generators is changing from constant to variable, and the characteristics of generators are also changed. To make sure that the generators can be adapted to the variable frequency operation, this paper analyzes the effects of different operating conditions on generator performance and proposes corresponding design methods. The design and verification of the electromagnetic field, fluid field, temperature field and stress field are carried out for the variable frequency generator. A prototype generator is manufactured according to the design results. An experimental platform is set up to test the performances of the designed generator. The final experimental results show that the generator can work well in variable frequency generation systems, which proves the design method proposed in this paper is effective and feasible.

Keywords: more electric aircraft; brushless synchronous generator; electric machine design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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