Transportation Systems and TechnologyTransportation Systems and TechnologyСетевой электронный журнал "Транспортные системы и технологии"2413-9203Eco-Vector1017610.17816/transsyst20184245-51Original papersОригинальные статьиResearch ArticleA special excitation system for analysis of coupling characteristics of thrust and levitation force of maglev trainhttps://orcid.org/0000-0002-7585-9608RaoJian
China

postgraduate student

raojian@mail.iee.ac.cnhttps://orcid.org/0000-0001-8561-5132WangKe
China

Doctor of Electrical Engineering, Professor

wangke@mail.iee.ac.cnhttps://orcid.org/0000-0003-1505-1209WangBoyu
China

postgraduate student

wangboyu@mail.iee.ac.cnGeQiongxuan
China

Doctor of Electrical Engineering, Professor

gqx@mail.iee.ac.cnhttps://orcid.org/0000-0002-7171-2422ShiLiming
China

Doctor of Electrical Engineering, Professor

limings@mail.iee.ac.cnLiYaohua
China

Doctor of Electrical Engineering, Professor

yhli@mail.iee.ac.cnKey Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of SciencesUniversity of Chinese Academy of SciencesKey Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering Chinese Academy of Sciences130920184245511309201813092018Copyright ©; 2018, Rao J., Wang K., Wang B., Ge Q., Shi L., Li Y.Copyright ©; 2018, Rao J., Wang K., Wang B., Ge Q., Shi L., Li Y.2018Rao J., Wang K., Wang B., Ge Q., Shi L., Li Y.Rao J., Wang K., Wang B., Ge Q., Shi L., Li Y.http://creativecommons.org/licenses/by-nc-nd/4.0https://journals.eco-vector.com/transsyst/article/view/10176

Background: In the maglev train propelled by long stator linear synchronous motor (LSLSM), the thrust characteristics are one of important points to evaluate the performance of the system. However, coupling effect exists between the propulsion and levitation system. Therefore, the interference from the levitation system must be considered when the propulsion system is designed.

Aim: The article focus on the analysis of coupling characteristics of thrust and levitation force of maglev train, and a special excitation system is designed for the study.

Methods: In order to study the thrust performance under the fluctuating air gap field under laboratory conditions, a rotating synchronous motor has been designed to imitate the long stator linear synchronous motor applied in high speed maglev train. And a special excitation system is designed for the rotating synchronous motor, which can simulate the fluctuation of the exciting current during the actual operation of maglev train. The air gap of the rotating synchronous motor is kept as constant, and the fluctuating excitation current is added to the excitation winding of the rotating synchronous motor, thus the simulation of air gap magnetic field variation is achieved.

Results: The special excitation system of the experimental motor is introduced in detail.

Conclusion: The relationship between thrust and levitation force of long stator linear synchronous motor (LSLSM) in maglev train is strong coupling, non-linear, and dynamic. Complete decoupling of thrust and levitation force is not easy to be achieved. The experimental platform has been built to study the coupling characteristics of thrust and levitation force of maglev train.

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