208 Ë 6 First manned HTS Maglev vehicle in the world
Guidance force research is quite complex. Not only larger relaxation phenome-
non can occur, but also the trapped flux may change in the testing process. Further
research is very necessary. In order to provide simultaneously both the levitation
forces and sufficient guidance forces for the Maglev system, it is necessary to find an
effective way to measure these forces more precisely.
Ma et al. [62] reported the investigation of the lateral guidance forces charac-
teristics of an analogous HTS Maglev vehicle system of YBCO bulks above a PMG
by measuring its resonant frequency (fRF) after being subject to a lateral displa-
cement. In conditions of FCH at 45 mm and working height (WH) of 25 mm, the
measured maximum restorable lateral displacement was 2.5 mm. The experimental
conditions were almost the same as for the above guidance force measurement of
the entire Maglev vehicle (FCH of 42 mm and WH of 26 mm). The measured maxi-
mum restorable lateral displacement of 2.5 mm was identical with that of 2 mm in
Fig. 6.72.
6.19 Long-term stability of the HTS Maglev vehicle in 2001–2003
Long-term stability of the HTS Maglev vehicle is very important. 46 days After the
“Century” was born, it was loaded onto two trucks and transported to Beijing for
exhibition at the Review of 15 Years for National High-tech R&D Program (National
863 Program) of China. In 2001, Tanaka, the chairman of the 14th International
Symposium on Superconductivity in Japan invited Jia-Su Wang to report about the
title of the first manned HTS Maglev vehicle in the world. At the meeting, Jia-Su Wang
reported the research results of “Century” and also published the first results [1] (see
Fig. 6.64) on the stability studies of the HTS Maglev vehicle.
The results of the long-term stability of the HTS Maglev vehicle were measured
with SCML-01 HTS Maglev measurement system in July 2001, December 2001, May
2002, and March 2003 [1, 12, 21, 26]. Table 6.17 lists the total levitation forces on
the eight on-board HTS Maglev equipments over the PMG at different levitation
gaps.
Tab. 6.17:Total levitation forces of eight on-board HTS Maglev equipments over the PMG (N)
in 2000–2003.
Gap (mm) 2000/12/24 2001/07/21 2001/12/24 2002/05/28 2003/03/05
10 10,885 10,943 10,091 10,431 –
15 9222 8940 8457 8486 8633
20 7563 7271 6927 6908 7094
25 6185 5890 5656 5618 5782
30 5061 4791 4685 4561 4693