The stability analysis of race track type Ag/Bi-2223 of the high-T-c superconducting synchronous motor

The purpose of this paper is to find out the three-dimensional (3D) magneti c field distribution inside the motor in order to determine if the high-T-c superconducting (HTS) tapes operate stably in actual motor operation. With this goal, magnetic held distribution in a detailed model of the actual mo tor was analyzed through Finite Element Method (FEM). The field current of 4 A is the amount of current needed to achieve 600 AT required by the previ ous simulation aimed at developing this motor. Also, it has been observed t hat the nux damper reduces armature reactance during the motor operation an d during load changes, improving the stable motor operation. And, it was ob served that the nux damper generates loss by means of leakage flux, but thi s is not significant and it doesn't degrade the performance of the HTS sync hronous motor.