Magnetization losses in magnets wound from anisotropic HTS tape conductors

In this paper, magnetization losses in high-T-c material (HTS) magnets are studied computationally by using a semi-analytical model. We show how condu ctor geometry, magnetic field dependence of critical current density, opera tion temperature and coil dimensions influence on the magnetization losses and loss distributions in magnets wound of HTS tapes. The loss computation is based on real electric field-current density characteristics of a Bi-222 3/Ag tape measured at the temperatures of 4.2 and 77 K. According to the re sults, the location of the loss maxima and minima in a magnet is determined by the conductor geometry. The anisotropy of the conductor only slightly m odifies the loss distribution but has a remarkable influence on the value o f loss density. Due to the high aspect ratio of a tape conductor, the loss density is the highest on the bottom and top surfaces of the magnet where t he radial component of the magnetic field is the highest. (C) 2000 Elsevier Science B.V. All rights reserved.