Study on suspension stability of high-speed HTS Maglev system in evacuated tube

Abstract

For the high-speed high-Tc superconducting (HTS) maglev system in evacuated pipe, the side-mounted permanent magnet double-track is used to provide suspension and guidance for the train. When the maglev is running in a round track or a curve, the centrifugal force exerts a side pressure on the track, causing displacement in the suspension direction. In this paper, the static simulation experiment is used to study the instability caused by suspension displacement during the dynamic process of maglev. The results show that under the premise of a given field cooling airgap, the suspension force decreases with the decrease of the suspended airgap and strengthens with the increase of the suspension displacement. In addition, reducing the field cooling airgap can increase the suspension force and reduce the suspension displacement. When the field cooling air gap on the spot is 10 mm and the initial suspension displacement is 2 mm, the suspension displacement will not exceed 2 mm when the train runs to the rated airgap of 5 mm, so that the train maintains high side suspension stability. The research results of this paper provide useful design reference for the application of high speed HTS maglev train in the evacuated tube.