Lateral Damping Characteristics of the Levitation Electromagnet for Low-Speed Maglev Trains
On a low-speed magnetic levitation(maglev) train, the levitation electromagnet, instead of an independent guiding electromagnet, provides the guiding force. In the past, the modeling of the electromagnetic force of the levitation electromagnet considered only the static guiding force in the presence of lateral displacement, and ignored the dynamic process between the levitation electromagnet and the track. Therefore, studies on the damping characteristics of the levitation electromagnet are rare. In this study, the lateral damping force of the levitation electromagnet is obtained based on the theory of eddy current and the energy conservation law. The results show that the calculated damping characteristics of the levitation electromagnet are in good agreement with experimental results. The lateral damping force of the levitation electromagnet is very small, and converged to become stable after 18 s upon a 2.5 mm lateral displacement. The conclusion provides an important theoretical basis guidance for the research of maglev suspension system damping and system stability.