6.17 First manned HTS Maglev vehicle in the world – “Century” Ë 199Fig. 6.62:The PMG of the total length of 15.5 m had a magnetic flux density of about 0.4 T at height
of 20 mm (see Section 6.14).
First, the supporting beam for the PMG was installed. Then each segment of the PMG
was mounted on the beam. The PMG consisted of two parallel PM tracks, whose
concentrated magnetic field at the height of 20 mm is about 0.4 T. The total length
of the PMG was 15.5 m. The linear motor, power supply, and control unit, liquid
pressure elevation equipment, photoelectric positioning device, etc. were assembled.
Figure 6.62 shows the PMG (see Section 6.14). Figure 6.62a shows the installed PMG
and linear motor, Fig. 6.62b shows the measuring distribution of the magnetic field
around the PMG, and Fig. 6.62c shows the Maglev system with the vehicle body frame
on the PMG.
Each on-board HTS Maglev equipment was 550 mm long, 150 mm wide, and
160 mm high. The bottom wall thickness was only 3 mm. There were 43 pieces of HTS
YBCO bulks in each rectangular-shaped liquid nitrogen vessel. The vehicle was driven
by a LIM and controlled by a ground control device. There was no control device on the
vehicle. The control device only controlled linear motor drive system. The levitation
and guidance systems were not required control. The stator of the linear motor was
positioned between two PMGs. The rotor, an induction plate, was attached on the
bottom of the vehicle. The magnetic field distribution between two the PMGs and
the linear motor was determined by theoretical calculation and experimental test.
There was no interaction when the linear motors operated. The whole stator was
15.5 m in length, separated into six segments with each segment provided electric
power separately. No electric power was required in the vehicle, except for the stator
of the linear motor on the support beam. When the stator was powered, it produced
a traveling magnetic wave. The interaction of the traveling magnetic wave and the
induction plate generated an electromagnetic force, which drove the vehicle forward.
The function of suspension was separated from the function of propulsion. The HTS
Maglev vehicle stably moved forward and backward using the linear motor.