Experimental Study on the Twist Characteristics of Novel HTS Square Wire with Different Structures

This paper presents the characteristics of novel high temperature superconducting (HTS) twisted square wires with different structure. First, the HTS tapes of 4 mm width are cut into 1 mm width HTS narrow tapes. Then, different numbers of HTS narrow tapes and narrow tape of copper are stacked to prepare a HTS square wire with three structures of 1 + 5c, 2 + 4c and 4 + 2c. Finally, the HTS square wires of these three structures were twisted, and the critical current characteristics of HTS tapes were tested under different twist pitches. The test results show that the twist pitch of the three structures is about 100 mm. The experimental results show that the preparation of HTS square wire with twisted characteristic better, which has broad application prospects in superconducting power equipment.