Design Of On-board YBCO Magnet For 600Km/h High Temperature Superconducting Electrodynamic Maglev

Maglev trains overcome the friction between wheels and rails of traditional trains and can reach higher speeds.In addition,it also has the advantages of low energy consumption and high comfort,so it has great research significance.The superconducting electrodynamic maglev has larger suspension gap and faster running speed,so it has a better application prospect.The on-board superconducting magnet is the core component of the superconducting electrodynamic maglev train.In order to reduce the cooling difficulty and cost,the preparation of on-board superconducting magnet using high temperature superconducting(HTS)materials is the future development direction.In this thesis,the superconducting electrodynamic maglev system will be analyzed,and further analysis of the electromagnetic characteristics of the superconducting magnet itself,on this basis,to complete the development of high temperature superconducting magnet.Firstly,the research status of magnetic levitation train and on-board high temperature superconducting magnets is introduced.In the development process of high temperature superconducting magnets,the problem of performance degradation caused by epoxy curing is faced.Then,the modeling of the superconducting electrodynamic maglev system is completed,including the modeling of the on-board superconducting magnet and the ground coil.The finite element simulation of the system is further completed,including the spatial distribution of the magnetic field of the on-board superconducting magnet,and the analysis and calculation of the suspension force,steering force and driving force of the train.The relationship between the levitation force and the train running speed,the relationship between the steering force and the transverse offset distance of the train,and the relationship between the driving force and the current of the driving coil are analyzed,which provides a theoretical basis for the design of the superconducting electrodynamic maglev train.Furthermore,the current safety margin of the on-board superconducting magnet is analyzed.In order to ensure the safe and stable operation of the maglev train,the design methods of reducing the working temperature of the magnet,using wider strip or reducing the working current,and using multiple superconducting strips in parallel to improve the safety margin of the magnet are put forward,and the analysis of these improved methods is completed.Finally,on the basis of literature research and simulation analysis,the electromagnetic design and tooling design of HTS magnets were completed,and the preparation of three HTS magnets with different insulating materials and curing materials was finally completed.The test results showed that the performance of the magnets did not degrade after curing and thermal cycling tests.77 figures,12 tables,49 references.