Current characteristics of strands weaved by transposed REBCO tapes

A superconducting strand, fabricated by weaving 3, 5, 7, or more transposed rare-earth barium copper oxide (REBCO) high-temperature superconducting (HTS) tapes, is proposed to enhance the critical current and achieve uniform distributions of operating current in each REBCO tape. This design allows all the HTS tapes to quench simultaneously, thereby increasing the critical current compared to a strand simply stacked with HTS tapes and improving HTS tape utilization. Additionally, the transposition strategy can be used to manufacture strands woven with more REBCO tapes for high-current applications such as power transmission. Experimental results demonstrate that strands woven with HTS tapes can enhance the critical current in comparison with strands simply stacked and Roebel cables. Furthermore, a finite element model (FEM) based on the H-formulation has been established to show the operating current distribution.