Numerical analysis of AC loss in high Tc twisted tape carrying AC transport current in external AC magnetic field - Effect of twisting on loss reduction
N. Banno et N. Amemiya, Numerical analysis of AC loss in high Tc twisted tape carrying AC transport current in external AC magnetic field - Effect of twisting on loss reduction, IEEE APPL S, 9(2), 1999, pp. 2561-2564
The effect of twisting in BSCCO tapes on the loss reduction is discussed wi
th the numerical analysis using the finite element method. The optimal twis
t pitch giving the lowest loss for the tape carrying the AC current under t
he AC magnetic field is presented. The numerical analysis takes the smooth
E-j characteristics, the twisted structure and the dynamic resistivity into
account, which allows more accurate loss estimations. For the BSCCO tape w
ith a typical dimension of 3 mm 0.2 mm, the optimal twist pitch is around 1
0 mm, when it is carrying the AC transport current with normalized amplitud
e I-t/I-c=0.8, under the parallel magnetic field to the tape face.