Development of a Real-scale REBCO Coil for the Demonstration of a Magnetomotive Force of 700 kA

Abstract

REBCO (Rare-Earth Barium Copper Oxide) is a high temperature superconducting material and allows on-board superconducting magnets on maglev trains to operate at higher temperatures. Because of the high operating temperature, the magnet can be cooled without liquid helium, reducing the magnet's energy consumption by nearly half. The basic technologies for making the magnet using REBCO coated conductors are still under development. A real-scale REBCO coil for application to maglev trains was therefore built. When excited at 35 K the real-scale coil demonstrated it had a magnetomotive force of 700 kA, which is the same as existing on-board magnets. This paper describes the manufacturing process of the coil and gives details of the excitation test.