High temperature superconducting synchronous motor

This paper deals with high temperature superconducting (HTS) synchronous motor, which has two characteristics: the HTS magnet with iron plates as field coil, and the solid nitrogen (SN₂) as a cryogen. The HTS magnet has iron plates to achieve the maximum current-carrying capacity and the simple shape that can easily be wound and jointed. The HTS magnet with iron plates, magnet optimized current distribution, and initial magnet are presented through FEA (finite element analysis), manufacturing and testing these magnets. SN₂ is employed for keeping the operating temperature of HTS synchronous motor. To make the SN₂ of liquid nitrogen (LN₂), liquid helium (LHe) passes into the heat exchanger and cools its own temperature. Two types of heat exchangers are designed and manufactured to make the SN₂, and each of the temperature characteristics is compared.