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For an accurate estimation of the AC losses of superconducting triaxialcables, we present a 2D model capable to provide a global assessment ofmulti-layer triaxial cables, validated against the AC-losses on single-phasecables provided by the VNIIKP Cable Institute. Four models are presented, thefirst being a single-phase cable of 50 tapes and the others being threetriaxial cables made of up to 135 coated conductors distributed in up to 9layers. A systematic study is devised, where the number of layers per phaseincreases from 1 to 3, with at least 14 tapes distributed across each layer ofthe first (innermost) phase, 15 in the secondary (middle) phase, and 16 in thethird (outermost) phase, respectively. Remarkably, our results reveal that thesimple strategy of considering an unbalanced distribution for the amplitudes ofthe applied current, can generally balance the magnetic field between the threephases even for the bilayer and trilayer cables, resulting in negligiblemagnetic leaks in all situations. Besides, our simulations allow to see for thefirst time how the transport and magnetization currents distribute across thethickness of all the superconducting tapes, from which we have found that theAC-losses of the 2nd phase is generally higher than at the other phases at lowto moderate transport currents Itr < 0.8 Ic. Nevertheless, depending on whetherthe Ic of the SC tapes at the 3rd phase layers is lower than the one at the 2ndphase, the layers at the third phase can exhibit a considerable increment onthe AC losses, as result of the considered magneto angular anisotropy of theHTS tapes, which lead to intriguing electromagnetic features that suggest apractical threshold for the applied transport current, being it 0.8 Ic.Likewise, the relative change in the AC-losses per adding layers, per phase,and as a function of the applied current is disclosed.

Electromagnetic Assessment and AC Losses of Triaxial Cables with Multiple 2G-HTS Layers Per Phase