4.7 HTS bulk Maglev train Ë 111suitable for ETT transportation. The ETT HTS Maglev train is a new transportation
system, and it has different characteristics, namely small vehicle, small guideway, and
high frequency dispatch.
Based on the experimental results from the HTS Maglev and the theoretical
calculations of the levitation forces of a single on-board HTS Maglev device of high-
quality HTS bulk on a new guideway, the design and realization of an ultra-high-speed
HTS Maglev is feasible [105].
Figure 4.17 illustrates the main components of an ultra-high-speed HTS Maglev
vehicle in a low-pressure tube (LPT) or ETT. The vehicle consists of tube, vehicle body,
bogie, low-temperature part, PMG, and linear motor. The bogie is used to transfer the
force from the low-temperature part to the vehicle body.
The low-temperature rectangular liquid nitrogen vessel on board has high me-
chanical strength at 77 K. The continuous operating period is 12 hours. The outside
size of the low-temperature vessel is 150×516 mm, with inside size 102×470 mm and
height of 170 mm. The bottom thickness of the vessel is 5 mm in order to increase its
mechanical strength.
The total load of the Maglev vehicle is 500 kg including two seats and 150 kg
weight of two passengers. The vehicle body is quasi-ellipsoidal in shape, and the
outside size of the vehicle with shell is about 2.3 m length, 0.95 m height, and 1.2 m
width. The final design results of the Maglev vehicle body are 5000 N of levitation force
and 1000 N of guidance force at a 15-mm net levitation gap. The guideway length is
1000 m. The maximum design speed of the vehicle will be over 600 km/h if unmanned,
and the manned speed is 100 km/h.
The vehicle would be driven by a linear motor and controlled by a control system
on the ground. Drive maximum acceleration can reach 5 g (about 49 m/s^2 ). The vehicle
running plan includes the acceleration for 300 m, uniform speed for 400 m, and brake
section for 300 m.
Fig. 4.17:The schematic structure for of the ultra-high-speed HTS Maglev in the LPT or ETT [105].
(1) Tube. (2) Vehicle body. (3) Bogie. (4) Low-temperature part (with superconductor inside).
(5) Permanent magnet guideway. (6) Linear motor.