An Energy-Efficient Control Method of Electromagnetic Suspension Damping in Superconducting EDS Maglev Train

Due to the non-contact nature of superconducting electrodynamic suspension maglev trains, researchers have developed an on-board power supply system based on decentralized generator coils (GCs). However, the weak damping characteristics of the levitation and guidance systems in maglev trains can compromise operational stability and comfort. The zero-phase current from the on-board GCs offers a dual solution, enabling both on-board power supply and vibration damping control, which has been successfully implemented in engineering projects. Previous studies indicate that zero-phase current control in the maximum force mode outperforms the proportional force mode in terms of effectiveness. Given the significant differences between these two control modes, their vibration suppression mechanisms and energy utilization warrant further investigation. This paper first establishes a zero-phase current control model using a fast mutual inductance calculation method. Through free vibration response analysis, optimal control parameters are identified for both the maximum force and proportional force modes. By examining their vibration suppression mechanisms and energy efficiency, the study introduces an “on–off” control method. The results demonstrate that this “on–off” control approach enhances vibration reduction and energy efficiency.