Design of Synchronous Motor with High-temperature Superconductive Field Windings for Marine Propulsion Applications

Abstract

High-temperature superconductive technology is currently under development and is attracting the attention of researchers. As a result, high temperature superconductive tapes have found their way to the electrical machines industry all around the world. First-generation high-temperature superconductive motors were introduced in the past decade. In high-temperature superconductive motors, conventional copper windings are mainly replaced by superconductive tapes, and a cryogenic system is added to decrease the temperature until the superconducting state can be achieved. Their significant capabilities, such as their high efficiency, persuade engineers to replace conventional motors with the new high-temperature superconductive ones. Their expense is the main barrier to their commercial penetrations; therefore their usage is limited to exclusive applications, such as marine applications. In this article, a marine propulsion synchronous motor with high-temperature superconductive field windings was designed initially; an appropriate high-temperature superconductive power supply and cooling structure were then also designed. A marine propulsion motor should be assimilated with real marine conditions, so size and AC supply limitation are the given examples, with the above-mentioned points also considered for the designed model motor.