| As a modern high-tech rail transportation,Maglev train has many advantages,such as low energy consumption,low noise,safety and comfort,always has been favored by re?searchers all over the world.At present,the maglev train which is put into practical use is mostly through the electromagnetic effect in the complex control system to make the train stable suspension.The characteristics of the high temperature superconducting block in the process of transition to the superconducting state has the characteristics of the trapped magnetic flux,which can be stably suspended in an external magnetic field without any external control.This makes the study of high temperature superconducting(HTS)magnet-ic levitation more meaningful.The emergence of high temperature superconducting technology has opened a new chapter in the field of magnetic levitation.The continuous development of the technology has a good application prospect in the fields of orbit,spaceflight,medical treatment and so on.In this paper,the dynamic characteristics of high temperature superconducting block are studied by using dynamic testing platform for HTS magnetic levitation system.It main-ly includes the characteristics of running direction force of HTS maglev system and vibra-tion characteristics of HTS levitation system under free suspension so as to explore more meaningful data for the future application of HTS maglev train.In the first chapter,the re-search background of this paper,the development of maglev train,the characteristics of HTS magnetic levitation and the principle of self-stable levitation are introduced and then described the research status of HTS maglev application,Finally,the main content and structure of the thesis are briefly introduced.In the second chapter,it mainly introduces the experimental device and experimental method used to study the dynamic characteristics of HTS Maglev System.In the third chapter,the magnetic field characteristics of the circular permanent mag-netic guideway(PMG)are analyzed by experiment and simulation software.Whether or not install the sheet iron are discussed and the cause of the inhomogeneity of the magnetic field distribution of a single block permanent magnet is analyzed.In the fourth chapter,through the arrangement of sheet iron in PMG,the magnetic field of the HTS maglev system is redistributed in driving direction.The characteristics of run-ning direction force of HTS maglev system are studied by experiment with different speeds and cooling conditions including field cooling and zero-field-cooling.In the fifth chapter,the vibration characteristics of HTS magnetic levitation system are studied.Then the influence of external factors including magnetic field fluctuation,velocity and field cooling height on the vibration characteristics of the system is tested and analyzed. |
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