132 Ë 5 HTS Maglev experimental methods and set-up
Fig. 5.15:Test results of levitation forces at the standard weight of 9.8 N at different sampling
velocities (the vertical move velocities are 0.1 to 1.0 mm/s (velocity partition 0.1 mm/s)) [11].
and dimensions. During the levitation forces test, standard weights of 9.8, 18.62, and
24.95 N, and vertical moving velocities of 0.1 to 1.0 mm/s (velocity partition 0.1 mm/s)
were used. Figure 5.15 shows the test results of the levitation forces at the standard
weight of 9.8 N and at different sampling velocities. At the standard weight of 9.8 N,
the measurement precision of the levitation force is 99.23%–99.55%, and the error
0.453%–0.773% with the range of 0.00256–0.02924.
Thus, it can be seen from Fig. 5.16 that the levitation force change is inde-
pendent of the standard weights of 9.8, 18.62, and 24.95 N. As the total change is
between 0.00163–0.0292. The levitation force measurement error is found to be plus
or minus 0.5%.
Figure 5.17 shows the test results of the levitation forces at different sampling
velocities which justifies the good repeatability of the levitation force measurements
of the SCML-02 HTS Maglev measurement system.
Figure 5.18 shows the synchronous test results of the levitation forces and gui-
dance force at the sampling velocity of 0.5 mm/s. The curves with other sampling
Fig. 5.16:Test errors of levitation forces at the different standard weights and sampling
velocities [11].