Trapped-flux internal-dipole superconducting motor/generator

A new class of motor/generator utilizes the magnetic flux trapping capability of high-temperature superconductors (HTSs). The rotor consists of a cylindrical shell composed of HTS segments that act as trapped-field magnets, magnetized in such a way that a dipole magnetic field is produced in the interior of the shell. A stator coil assembly is placed in the interior of the shell, and current passing through the conductors of the coil produce a rotational torque, either as a hysteresis motor or as a synchronous motor. The coil may be either conventional, with copper wires and an iron core, or composed of superconductors that establish the trapped fields.