Chapter 1.5: AC Loss of Bi-2223 Wires

In most alternating current (AC) power devices, Bi-2223 wire should carry an AC transport current under an AC external magnetic field, and transport losses due to transport current and magnetization losses due to external field are simultaneously generated in the wire. The magnitude of losses and difficulty of the loss reduction are strongly influenced by the direction of external field against the broader face of a tape-form Bi-2223 wire. In this article, the AC loss characteristics of Bi-2223 wire carrying a current in a transverse external field is shown and contribution of both transport and magnetization losses in total losses is briefly discussed. In addition, demonstration of the magnetization loss reduction under a transverse field in perpendicular to the broader face of the wire is described.