A proposal for Switched Magnetization Superconductor Motor

Switching of superconducting Meissner state using temperature and current density for motoring applications has been explored in Meissner Motor and Superconductor Actuator respectively. In this paper, a Switched Magnetization Superconductor Motor (SMSM) using magnetic field is proposed. The rotor comprises of permanent magnets and the stator comprises of permanent magnet and superconductor bulk pairs. Static field profiles of the stator and quasi-static force on rotor with Meissner and mixed states are calculated numerically without switching the states. Experimental measurements of mixed state are taken without switching the states. While net area under Force vs Distance curve is 0, a minimum of 5% difference in absolute area has been observed. From numerical and experimental results, it is proposed that switching of superconductor states using magnetic field would result in net positive area under Force vs Distance curve in one cycle. The process of switching and thermodynamic cycle of superconductor are discussed.