A single-sided linear synchronous motor with a high temperature superconducting coil as the excitation system

TL;DR

This paper demonstrates the use of a high-temperature superconducting coil in a single-sided linear synchronous motor, achieving significant thrust improvements with iron components at cryogenic temperatures.

Contribution

It introduces a superconducting excitation coil for a linear motor and quantifies thrust enhancements with iron core and back plate additions.

Findings

Thrust of 24 N achieved at 77 K with superconducting coil.

Iron core increases thrust by 49%.

Iron back plate increases thrust by 70%.

Abstract

Thrust measurements were performed on a coil made of YBa2Cu3O7-d coated conductor acting as the excitation system of a single-sided linear synchronous motor. The superconducting coil was a single pancake in the shape of a racetrack with 100 turns, the width and effective lengths were 42 mm and 84 mm, respectively. The stator was made of conventional copper wire. At 77 K and a gap of 10 mm, with an operating direct current of I_DC=30 A for the superconducting coil and alternating current of I_AC=9 A for the stator coils, thrust of 24 N was achieved. With addition of an iron core, thrust was increased by 49%. With addition of an iron back plate, thrust was increased by 70%.