Partial insulation of GdBCO single pancake coils for protection-free HTS power applications

Abstract

The partial insulation winding was examined to ameliorate the slow charge-discharge shown by coils wound without insulation. Single pancake coils of GdBCO coated conductor were wound without insulation, with kapton tape every five turns, and with the full use of kapton tape. They were characterized by charge-discharge, sudden discharge, and over-current testing. The improved charging and discharging and high thermal and electrical stabilities of the partially insulated coil demonstrate its potential for use in HTS power applications.