A SUPERHIGH SPEED HTS MAGLEV VEHICLE

2005 ◽  
Vol 19 (01n03) ◽  
pp. 399-401 ◽  
Author(s):  
JIASU WANG ◽  
SUYU WANG ◽  
CHANGYAN DENG ◽  
YOUWEN ZENG ◽  
HONGHAI SONG ◽  
...  
Keyword(s):  
High Temperature ◽  
High Speed ◽  
Aerodynamic Resistance ◽  
Pressure Tube ◽  
Speed Limit ◽  
High Temperature Superconducting ◽  
Maglev Vehicle ◽  
Hts Maglev ◽  
Evacuated Tube Transport ◽  
Evacuated Tube

When the velocity of the normal ground traffic transportation is higher than 350 km/h of the speed limit, not only the running noise of the ground traffic vehicle is higher, but also the 90% driving power is dissipated in the aerodynamic resistance. The high speed may be realized when a high temperature superconducting (HTS) Maglev vehicle runs in low-pressure tube or evacuated tube transport (ETT). Its speed is over 3000 km/h. As a new ground transportation system the HTS Maglev vehicle is presented after the experiment results of HTS Maglev vehicle are discussed in this paper.

Analysis of the Permanent Magnet Guideway of High Temperature Superconducting Maglev

2013 ◽  
Vol 745-746 ◽  
pp. 197-202 ◽  
Author(s):  
Chang Qing Ye ◽  
Zi Gang Deng ◽  
Jia Su Wang
Keyword(s):  
High Temperature ◽  
Permanent Magnet ◽  
High Speed ◽  
Optimization Design ◽  
Optimization Methods ◽  
High Temperature Superconducting ◽  
Practical Engineering ◽  
Hts Maglev ◽  
Ndfeb Permanent Magnet ◽  
The Cost

t was theoretically and experimentally proved that High Temperature Superconducting (HTS) Maglev had huge potential employment in rail transportation and high speed launch system. This had attracted great research interests in practical engineering. The optimization design was one of the most important works in the application of the HTS Maglev. As the NdFeB permanent magnet and HTS materials prices increased constantly, the design optimization of the permanent guideway (PMG) of HTS maglev became one of the indispensable works to decrease the cost of the application. This paper first reviewed four types of PMGs used by the HTS Maglev, then disucssed their structures and magnetic fields. Finally, the optimization methods of these four PMGs were compared. It was suggested that with better optimization methods, the levitation performance within a limit cost got better. That would be helpful to the future numerical optimization of the PMG of the HTS maglev.

Dynamic motion modes of high temperature superconducting maglev on a 45-m long ring test line

2017 ◽  
Vol 31 (25) ◽  
pp. 1745021 ◽  
Author(s):  
W. Y. Lei ◽  
N. Qian ◽  
J. Zheng ◽  
L. W. Jin ◽  
Y. Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Test Line ◽  
Phase Relationship ◽  
Ring Test ◽  
Vertical Acceleration ◽  
High Temperature Superconducting ◽  
Maglev Vehicle ◽  
Motion Modes ◽  
Hts Maglev ◽  
Acceleration Signals

With the development of high temperature superconducting (HTS) maglev, studies on the running stability have become more and more significant to ensure the operation safety. An experimental HTS maglev vehicle was tested on a 45-m long ring test line under the speed from 4 km/h to 20 km/h. The lateral and vertical acceleration signals of each cryostat were collected by tri-axis accelerometers in real time. By analyzing the phase relationship of acceleration signals on the four cryostats, several typical motion modes of the HTS maglev vehicle, including lateral, yaw, pitch and heave motions were observed. This experimental finding is important for the next improvement of the HTS maglev system.

scholarly journals High-Temperature Superconducting Non-Insulation Closed-Loop Coils for Electro-Dynamic Suspension System

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1980
Author(s):  
Li Lu ◽  
Wei Wu ◽  
Xin Yu ◽  
Zhijian Jin
Keyword(s):  
High Temperature ◽  
Liquid Helium ◽  
High Speed ◽  
Closed Loop ◽  
Permanent Magnets ◽  
Superconducting Magnets ◽  
Current Mode ◽  
Persistent Current ◽  
Magnetomotive Force ◽  
High Temperature Superconducting

The null-flux electro-dynamic suspension (EDS) system is a feasible high-speed maglev system with speeds of above 600 km/h. Owing to their greater current-carrying capacity, superconducting magnets can provide a super-magnetomotive force that is required for the null-flux EDS system, which cannot be provided by electromagnets and permanent magnets. Relatively mature high-speed maglev technology currently exists using low-temperature superconducting (LTS) magnets as the core, which works in the liquid helium temperature region (T ⩽ 4.2 K). Second-generation (2G) high-temperature superconducting (HTS) magnets wound by REBa2Cu3O7−δ (REBCO, RE = rare earth) tapes work above the 20 K region and do not rely on liquid helium, which is rare on Earth. In this study, the HTS non-insulation closed-loop coils module was designed for an EDS system and excited with a persistent current switch (PCS). The HTS coils module can work in the persistent current mode and exhibit premier thermal quenching self-protection. In addition, a full-size double-pancake (DP) module was designed and manufactured in this study, and it was tested in a liquid nitrogen (LN2) environment. The critical current of the DP module was approximately 54 A, and it could work in the persistent current mode with an average decay rate measured over 12 h of 0.58%/day.

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