The Study Of Two-conductor Plate Parallel Electric Suspension And Guiding Technology

The electric magnetic levitation mechanism is an electromagnetic mechanism that generates electromagnetic force by interaction between eddy current and source magnetic field to realize suspension and guiding.It has many advantages,such as safety and reliability,large suspension gap,relatively low cost,etc.It has good application prospects in the fields of transportation(such as,maglev trains)and electromagnetic launches(such as,space-assisted launch systems).In this paper,based on the aerospace vehicle magnetic suspension electromagnetic boost launch technology,a two-conductor parallel electric suspension guide based on electrodynamic suspension principle is studied.Its stiffness and dynamic stability are analyzed by establishing analytical model and finite element models.The variation of suspension characteristics of TPESGM under different structural parameters is revealed.Finally,the prototype is fabricated and experimental research is carried out.Firstly,according to the equivalent magnetization method,the action of the permanent magnet is equivalent to the magnetization intensity function,and the two-dimensional analytical model is derived according to the layering theory,and the vector magnetic potential and the air gap magnetic density expression of each region are obtained.The analytical model of TPESGM is established according to the proposed partitioning method and symmetry principle,and then the analytical model is verified by the finite element method.The analytic method results are compared with the finite element method results,and the relative error is less than 10%.Secondly,according to the definition of stiffness,the stiffness coefficient matrix of the magnetic levitation device is established,and the stiffness coefficient is simplified due to the structural characteristics of TPESGM.Then,the analytic method and the finite element method are applied to analyze the stiffness characteristics.and the method of damping coefficient is proposed.Its static stability and dynamic stability are analyzed.In addition to a degree of freedom,the static stability has an unstable tendency,and other degrees of freedom are stable;after the external disturbance in the suspension and guiding directions,the stability can be restored.Finally,according to the established analytical model,the structural factors affecting the levitation characteristics of TPESGM are found out,and the finite element model is established to analyze the main influencing factors,revealing the variation of suspension characteristics under different structural parameters.The best ratio of pole to lateral coupling length ratio is 5 to 7,which provides a reference for the summary of TPESGM design methods.Summary for reference.In addition,a prototype of TPESGM is designed and produced for testing and experimental research.