192 Ë 6 First manned HTS Maglev vehicle in the world
Fig. 6.52:Displacement dependence of the magnetic field for a gap of 5 mm to 50 mm over the PMG.
Disp00 represents the magnetic field along thez-axis at the displacement of 0 mm; Disp10, 10 mm;
Disp16, 16 mm; and so forth [41].
Figure 6.52 shows the displacement dependence of the magnetic field from a gap of 5
to 50 mm over the PMG. Disp00 represents the magnetic field along thez-axis at the
displacement of 0 mm, similarly for Disp10, Disp16, etc [41].
6.15 On-board HTS Maglev equipment [54]
Based on the experience with the small columnar liquid nitrogen vessel (see Section
5.2.2), the on-board rectangular-shaped liquid nitrogen vessel was developed. The
bottom thickness of the rectangular-shaped vessel is thinner than that of the small
columnar vessel. It is only 3 mm. The scheme of the rectangular-shaped thin bottom
liquid nitrogen vessel is shown in Fig. 6.53. Its outside and inside dimensions are
150 × 516 ×168 mm and 102× 470 ×168 mm, respectively. This liquid nitrogen vessel
can operate continuously over 6 hours. Figure 6.54 shows the evaporation rate of a new
rectangular liquid nitrogen vessel with a thin bottom [21]. The vessel was successfully
installed on the HTS Maglev test vehicle “Century”.
The on-board HTS Maglev equipment is the key component of the HTS Maglev
vehicle system. The photographs of the on-board HTS Maglev equipment are shown
in Fig. 6.55.
The on-board Maglev equipment is composed of 43 pieces of YBCO bulks and
rectangular-shaped liquid nitrogen vessel. There are 43 pieces of YBCO bulks in each
vessel. Figure 6.55a shows the installed bulks without the seal box. The YBCO bulks
are 30 mm in diameter and 17–18 mm in thickness. The YBCO bulks are arranged at the
bottom of the liquid nitrogen vessel. In order to avoid degradation of YBCO bulks, all 43
pieces of YBCO bulks are sealed by a special technology. Figure 6.55b shows the upper
and lower seal box cover (above) and the sealed welded box with the 43 pieces of YBCO
(below). In order to ensure that YBCO bulks are not damaged by the high-temperature