We investigated the possibility of applying high-Tc superconducting traction transformer to rolling stock. In order to achieve lightweight, the traction transformer needs to have a special winding structure unlike the experimental high-Tc superconducting power transformers fabricated so far. The windings of the traction transformer need to be arranged as densely as possible in a high magnetic field. Then, we fabricated two high-Tc superconducting coils that simulated the primary and secondary windings. We measured the I-V, AC loss, current sharing and over current characteristics of these coils cooled by saturated and subcooled liquid nitrogen.

Copyright (c) 2003 Railway Technical Research Institute