Performance of Induction/Synchronous Motor Having ${\rm MgB}_{2}$ Cage Windings for Liquid Hydrogen Circulation Pump

We have been developing superconducting induction /synchronous motor incorporated with
${\rm MgB}_{2}$
cage windings. Target application of the motor is the liquid hydrogen circulation pump. In this paper, the performance of the fabricated motor was estimated based on nonlinear electrical equivalent circuit. It was shown that the experimental results of the motor characteristics such as torque vs. slip curve can be reproduced based upon the theoretical estimation. From this result, we can design the MgB2 pump motor by means of commonly utilized method of the electrical circuit.