Table 1 Summary of the design optimization results at 30 K and 77 K.

From: An on-board 2G HTS magnets system with cooling-power-free and persistent-current operation for ultrahigh speed superconducting maglevs

Parameters

Specifications

Geometrical size g/w/d/lr/a/pr (mm)

86/36/102/200/32.3/260

Operating current @ 30 K/@ 77 K

300 A/48 A

Magnet Ic @ 30 K/@ 77 K

387.46 A/68.14 A (self-field)

MMF per magnet @ 30 K/@ 77 K

360 kA/57.6 kA

HTS wire length per magnet

~910 m

Mass per magnet (including bobbins)

~18 kg

Number of NI DP coils per magnet

4

Total inductance of the two magnets

551.11 mH