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Experimental Research on the Dynamic Levitation Characteristics of High Temperature Superconductor YBCO Bulks under Moving Applied Magnetic Field

Author: DengZiGang
Tutor: WangJiaSu
School: Southwest Jiaotong University
Course: Traffic Information Engineering \u0026 Control
Keywords: High-temperature superconductors Maglev Sports external magnetic field Speed Changes in the levitation force
CLC: O511.9
Type: PhD thesis
Year: 2009
Downloads: 146
Quote: 7
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Abstract


In the context of human society, the pursuit of sustainable development of high-tech, high-temperature superconducting maglev technology has the advantages of energy saving, environmental protection, security, high-speed, comfort is undoubtedly one of the important choices for the future of rail transport. In order to speed up the process of the end of 2000, the first successful development of international manned high-temperature superconducting magnetic levitation vehicle from the experimental demonstration and pilot line test, the change for the high-temperature superconducting maglev car up and running after the suspension performance, high-temperature superconducting YBCO The bulk suspension characteristics under different velocities external magnetic field system. Papers in three main areas, the first part is optimized for the performance of high-temperature superconducting maglev vehicle to explore to improve the performance of the high-temperature superconductors - permanent orbit interaction of the quasi-static suspension optimization method, which provides a basis for follow-up of the dynamic suspension properties of and learn; rotational losses of the second part of the reference high-temperature superconducting magnetic bearing (SMB), homemade SMB experimental platform the the dynamic suspension characteristics of the the different speed permanent magnet - high-temperature superconductors suspension system; Part III of the group in 2006 successfully developed high-temperature superconducting maglev dynamic test system (SCML-03) as a platform to simulate the real operation of the high-temperature superconducting maglev vehicle to study the velocity above the PMG car high-temperature superconducting bulk suspension force performance changed. Including: field cooling height, working height, sports mode, the running time, the maximum operating speed of the impact of the experimental conditions. It is noteworthy that the second, the three parts of the contents of the main characteristics of the magnetic field outside the movement in that: the high uniformity of SMBs in an external magnetic field provided by the permanent magnet, experimental high-temperature superconductive magnetic levitation vehicle with the magnetic field of permanent track certain unevenness resistance, which makes the paper work comparable, more vivid results. The main innovation lies in the SCML-03 dynamic testing device for the first time in permanent orbit above the levitation force performance relative speed 0-238km / h within the vehicle high-temperature superconducting bulk, which is by far the high temperatures involved superconducting maglev vehicle dynamic operation of the experimental speed. It was found by the permanent orbit exists in the direction of magnetic field inhomogeneity, work run mainly by the car at the top of the high-temperature superconducting bulk hysteresis loss, eddy current loss and high-speed operation shielding current delay the role of these three areas, and ultimately make the bulk the levitation force fluctuations, attenuation, and high-speed operation under suspension decline phenomenon in the course of the campaign. Which sports the bulk suspension force of the magnetic field decay mechanism is attributed to the heat energy loss resulting in the decline in performance parameters of the bulk. Departure from the mechanism, the paper presents the levitation force attenuation can effectively inhibit and verified experimentally. Finally, in this study based on the results from the application point of view of future high-temperature superconducting magnetic levitation vehicle system design provides a permanent rail assembly technology, including eight design recommendations. The above findings provide important reference and basis for the next step in the test line in the high-temperature superconducting maglev vehicle design and experimental.

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CLC: > Mathematical sciences and chemical > Physics > Low Temperature Physics > Superconductivity > Superconductivity applications
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