Study on Electromagnetic Relationship and Dynamic Characteristics of Superconducting Electrodynamic Maglev Train on Curved Track

This study considers an electrodynamic maglev train of the MLX01 type as the research object. Equivalent circuit models of levitation/guidance were established, and forces in different directions were solved using the energy method A field-circuit-motion coupling numerical model of a single bogie and a ground coil was established. Based on the field-circuit-motion coupling model, the various electromagnetic relationship of maglev train on curved track was analyzed. The law of the electromagnetic spring coefficient and the internal mechanism under different electromagnetic parameters was explored. Considering the coupling characteristics between the electromagnetic forces, the characteristics of the levitation force and guidance force under different standard air gaps were analyzed, and a numerical fitting analysis was performed. On this basis, the laws of levitation force and guidance force with levitation displacement and guidance displacement, as well as the characteristics of drag force with operation speed under different standard air gaps, were studied. Meanwhile, the characteristics of the guidance-drag ratio and levitation-drag ratio were analyzed. A dynamic model with 20 degrees of freedom was established based on the analysis of the geometric model of the maglev train. Taking the track irregularity as the external excitation source of the bogie, the dynamic characteristics of the bogie and vehicle body under different standard air gaps and speeds were analyzed. The effects of different suspension damping and stiffness coefficients on the vibration characteristics of a vehicle body were studied. This provides important theoretical and data support for design and dynamic analysis of superconducting electrodynamic maglev trains.

Automated summary

This study focuses on the MLX01 type of electrodynamic maglev train and establishes equivalent circuit models for levitation/guidance. The forces in different directions are solved using the energy method. A field-circuit-motion coupling numerical model is then established for a single bogie and ground coil. Based on this model, the electromagnetic relationships of the maglev train on curved tracks are analyzed. The study explores the electromagnetic spring coefficient and its internal mechanism under different electromagnetic parameters. Considering the coupling characteristics of electromagnetic forces, the levitation force and guidance force under different standard air gaps are analyzed, along with a numerical fitting analysis. Furthermore, the levitation force, guidance force, and drag force characteristics are studied with levitation displacement, guidance displacement, and operation speed under different standard air gaps. The study also analyzes the guidance-drag ratio and levitation-drag ratio. A dynamic model with 20 degrees of freedom is established based on the geometric model of the maglev train. The dynamic characteristics of the bogie and vehicle body under different standard air gaps and speeds are analyzed, considering the track irregularity as the external excitation source. The effects of suspension damping and stiffness coefficients on the vibration characteristics of the vehicle body are also studied. This study provides important theoretical and data support for the design and dynamic analysis of superconducting electrodynamic maglev trains.