Study Of The Maglev Performance Of The Side-Mounted High-Temperature Superconductor Maglev Rotating System

As a typical application of high-temperature superconductivity, high temperature superconducting (HTS) maglev system which possesses characteristics of self-stability, high-speed, environmental protection, energy saving, low noise and other advantages is more and more widely concerned and studied.This research is based on the background of a HTS maglev rotating system in the vacuum piping, mainly for a new type of a side-mount high-speed HTS maglev rotating system. We explore the characteristics and the change of levitation force and guidance force and seek the best operating parameters through experiments which simulate the operation of the system. And for the permanent magnet guideway(PMG) used in HTS maglev system, the iron shims of different thicknesses was investigated. We explore levitation force of bulks in different arrangement and distance away from the center of PMG and discuss the impact of the levitation force on the stability of side-mount HTS maglev system. All of then provide the basis for the establishment of the side-mount HTS maglev system.In the first chapter, the subject background is introduced. And the research progress in the field of high-temperature superconducting at home and abroad in summarized, including some main application of HTS levitation. Finally the instrument and HTS bulks used in the experiments are listed.The second chapter briefly describes the main applications of magnetic levitation technology, the maglev train, including the normal conducting and superconducting maglev technology. For high-temperature superconducting maglev, introduced its suspension principle and some kind of model at present.In the third chapter, we discuss the side-mounted high-temperature superconductor maglev rotating system and introduce its structural characteristics and advantages. For the two characteristics that the rapid decrease of maglev gap and the difficulty of holding bulks in the central of PMG at runtime, experiment is designed and proceeded. We test the changes of levitation force and guiding force in an off-center position when maglev gap decreases. It is found that the arrangement of bulks possess the better levitation performance for the side-mounted HTS maglev rotating system and can improve system stability effectively.In the forth chapter, the PMGs with different thicknesses of iron shims(4/6/8mm) were studied. The space magnetic fields over PMGs were simulated and the experiments were proceeded to explore the impact of thicknesses of iron shims on levitation force of bulks in different arrangements and different distance away from the center of PMG And we obtain a more optimized shim thickness parameters and arrangement mode selection at last.