Design and Analysis of a New Fully Stator-HTS Motor

The fully high temperature superconductor (HTS) motor can offer high efficiency, small size, and high torque density. However, the available fully HTS motors suffer from the high cost cooling system. There should be two cooling systems for the HTS armature coils and the HTS field coils, particularly, the rotating HTS field coils. In this paper, a new fully stator-HTS motor is proposed. The key of the proposed motor is that both the HTS armature coils and HTS field coils are placed in the stator. Hence, only one cooling system is needed. Meanwhile, all these stationary HTS coils avoid the rotated cooling system. Then, the cost of the cooling system can be reduced greatly. Moreover, since the rotor structure is similar with the switch reluctance motor, the proposed motor provides the advantages of simple rotor configuration and high mechanical robustness. The electromagnetic performances of the newly designed stator-HTS motor are analyzed including the flux, back electromotive force as well as torque. The effectiveness of the theoretical analysis is verified by the finite-element analysis.