AC loss study of antiparallel connected YBCO coated conductors

Abstract

Some applications of high temperature superconducting conductors require a non-inductivewinding, which may be constructed from antiparallel connected YBCO (yttrium bariumcopper oxide) tapes. In the case of AC applications, this antiparallel winding changes theAC losses from that of an isolated conductor. This study focuses on the effect of the spatialseparation and misalignment between conductors on their AC loss behavior for YBCOconductors on both rolling assisted biaxially textured substrate (RABiTS) and ion beamassisted deposition templates in an effort to fully understand the behavior of theseconductors in real world applications. For RABiTS samples, the study was carried out forall three possible configurations (the so-called back-to-back, front-to-front and same-wayconfigurations) to clarify the effect of the ferromagnetic substrate on the ACloss behavior in these conductor configurations. Numerical simulations were alsoemployed in some cases to compare with and elucidate experimental observations.