Hello Nguyen,
To use Litz wire model, we should select "stranded". Maxwell will use flux density to perform post-processing for AC losses calculation of Litz wire too, so total Litz wire loss would include DC and AC losses.
Please see https://www.ansys.com/blog/using-litz-wire-in-maxwell-2d-and-3d-simulations and https://www.ansys.com/blog/all-wound-up-new-litz-wire-modeling-and-loss-prediction-in-ansys-maxwell
HDLI
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