Modeling Analysis and Experimental Study of the Eddy Current Effect on Suspension Magnet in Medium-Speed Maglev Train

摘要

This paper analyzed the levitation force loss caused by the eddy current effect of the suspension electromagnet in medium-speed maglev train which operates in the 0 to 200 km/h speed range. First of all, based on the basic electromagnetic field theory, a mathematical model of vertical levitation force under different speeds considering eddy current effect is established. Based on the model, the levitation force attenuation of different suspended electromagnets with different load conditions, operating speed and track conductivity is analyzed. The calculation results shows that the main levitation force loss is in the front electromagnet, and the force loss of others is small. Furthermore, experiment are taken in Beijing maglev SI line vehicles, the suspension force of different electromagnets in vehicle are compared. The experiment result shows that, with the operating condition of heavy load and maximum speed of 65km/h, the first electromagnet in speed direction lost 10 percents levitation force. The experiment result verified the correctness of theoretical analysis. The research results will be the basement for electromagnets design and production of medium speed maglev train.