Abstract
Using an electro-magnetic method, we measured the total AC loss of a YBCO coatedconductor carrying an AC transport current in an AC transverse magnetic field withvarious orientations. We measured the magnetization loss (energy flow from the externalmagnetic field) and the transport loss (energy flow from the transport current circuit)independently during simultaneous application of an AC transverse magnetic field andAC transport current. Their sum gave us the total AC loss. The transport lossincreases with increasing AC transverse magnetic field, and the magnetization lossincreases with increasing AC transport current. The AC transverse magnetic fieldand the AC self magnetic field interact with each other at the conductor edges.This nonlinear interaction is a possible cause of the increase in AC loss. Dueto the high aspect ratio of YBCO coated conductors, this increase in AC lossdue to the interaction between the AC transverse and AC self magnetic fields isobserved even when the transverse magnetic field is nearly parallel to the conductorwide-face. When the total AC losses for various transport currents and various fieldorientations are plotted against a transverse magnetic field component which isperpendicular to the conductor wide-face, the plots with different field angles butidentical transport current all agree quite well with each other. The total AC loss isdominated by the self magnetic field and the perpendicular component of thetransverse magnetic field, both of which mostly penetrate from the conductor edges.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have