AC losses in rabits-based conductors

The impact of the different components of the ac loss in composite YBa2Cu3Ox (YBCO) coated conductors that are fabricated through the rolling assisted biaxially textured substrate (RABiTS) method are considered. The ac losses are examined as a function of ac field and ac current with respect to theoretical models as well as experimental results. The influence of the ferromagnetic loss of the substrate is considered and while it makes a contribution at low ac currents, the hysteretic loss of the superconductor is more significant at high ac currents and applied fields. The benefits of filamentization are presented, but issues with respect to coupling and eddy current losses suggest that more work is needed to reduce the total ac losses. After the ac losses are considered on an individual tape, a case study of the ac losses in high temperature superconducting cables that are made from YBCO tapes is presented.