Influence of Magnet Quench on Running Characteristics of the Superconducting Magnetically Levitated Bogie

Abstract

Numerical simulation of running characteristics of the superconducting magnetically levitated system (JR Maglev system) was carried out. For verification of running stability, the bogie motion in the case of superconducting coil quenching was calculated. This system is propelled by a linear synchronous motor, and levitated by electrodynamic suspension. We have developed a running simulation program that includes both the propulsion and the Levitation systems, and can calculate three-dimensional bogie motion. The results when the first SC coil was quenched, are shown. The influence was most pronounced in the SC coil adjacent the quenched coil. Although the quenching of the SC coil changed the currents of the other SC coils due to their flux conservation characteristic, it induced no quench and increased the current by only 5% even in the SC coil next to the quenched one. Lateral displacement of the bogie edge reached more than 50% of the lateral air gap. However, the bogie could run without touching the sidewall of the guideway.