Open AccessModeling Eddy Current Losses in HTS Tapes Using Multiharmonic Method
Author(s) -
J. Ruuskanen,
M. Lyly,
A. Halbach,
T. Tarhasaari,
V. Lahtinen,
T. Salmi,
P. Rasilo
Publication year - 2023
Publication title -
ieee transactions on applied superconductivity
Language(s) - English
Resource type - Journals
eISSN - 1558-2515
pISSN - 1051-8223
DOI - 10.1109/tasc.2023.3242619
Subject(s) - fields, waves and electromagnetics , engineered materials, dielectrics and plasmas
Due to the highly nonlinear electrical resistivity of high temperature superconducting (HTS) materials, computing the steady-state eddy current losses in HTS tapes, under time-periodic alternating current excitation, can be time consuming when using a time-transient method (TTM). The computation can require several periods to be solved with a small time-step. One alternative to the TTM is the multiharmonic method (MHM) where the Fourier basis is used to approximate the Maxwell fields in time. The method allows obtaining the steady-state solution to the problem with one resolution of the nonlinear problem. In this work, using the finite element method with the $H-\varphi$ formulation, the capabilities of the MHM in the computational eddy current loss modeling of HTS tapes are scrutinized and compared against the TTM.