represent respectively the number of turns,
the voltage and the current of the normal conductor
winding wrapped around each pole in Fig.1, while m is
the mass of the electromagnet, g is gravity acceleration,
and S is the area of the magnetic pole.
The coil winding of the HTS electromagnet is made of
Bi2223 multi-filamentary type, where s N and s i are
respectively the number of turns and the constant
current of the HTS coils
The gap magnetic flux density