Analysis of eddy current induced in track on medium-low speed maglev train

3rd International Conference on Advances in Energy, Environment and Chemical Engineering

能源学;生态环境科学;化学工业

Li, Guanchun^1 ; Jia, Zhen^1 ; He, Guang^1 ; Li, Jie^1

School of Engineering Research, Center of Maglev Technology, National University of Defense Technology, Changsha

410000, China^1

关键词: Air-gap magnetic field;    Correction coefficients;    Eddy-current effects;    Electromagnetic levitation;    Levitation force;    Medium-low speed maglev trains;    Suspension performance;    Velocity curves;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/69/1/012184/pdf
DOI  :  10.1088/1755-1315/69/1/012184

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Electromagnetic levitation (EMS) maglev train relies on the attraction between the electromagnets and rails which are mounted on the train to achieve suspension. During the movement, the magnetic field generated by the electromagnet will induce the eddy current in the orbit and the eddy current will weaken the suspended magnetic field. Which leads to the attenuation of the levitation force, the increases of suspension current and the degradation the suspension performance. In this paper, the influence of eddy current on the air gap magnetic field is solved by theoretical analysis, and the correction coefficient of air gap magnetic field is fitted according to the finite element data. The levitation force and current are calculated by the modified formula, and the velocity curves of the levitation force and current are obtained. The results show that the eddy current effect increases the load power by 61.9% in the case of heavy loads.