20.500.12556/DKUM-98017 Determination of material permeability and conductivity based on electrical measurements using FEM and optimization methods Every day, more and more electrical devices are produced, such as electric motors and actuators, which tend to operate according to their intended purpose with minimal maintenance. This is possible if they are assembled with the right input material, which needs to be tested at various stages of production. The presented approach proposes using the existing measuring equipment, combined with the finite element method and an optimization method, to determine the relative permeability and conductivity—in a contactless manner—from electrical measurements for magnetic steel materials. A comparison was made among three models: a whole 3D model, a 1/8 symmetrical 3D model, and a 2D axisymmetric model. During the research, the importance of using a skin-depth mesh was emphasized to obtain the correct results. A novel approach is used to analyze and optimize both the permeability and conductivity using a single model, optimization, and measurements. The optimized Finite Element Model shows very strong model conditioning, as tested with reference data, yielding great results with the measured data. magnetic material contactless finite elements method differential evolution magnetni materiali contactless finite elements method diferencialna evlucija true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/applsci © 2026 by the authors Članek v reviji 2026-05-08 09:48:40 2026-05-08 09:48:40 2026-05-09 03:09:16 0000-00-00 00:00:00 2026 0 0 22 str. iss. 10, [article no.] 4580 Vol. 16 2026 0000-00-00 Zaloznikova Objavljeno apc 2026-04-08 2026-05-03 2026-05-07 537 277472003 10.3390/app16104580 2076-3417 applsci-16-04580.pdf applsci-16-04580.pdf 1 9CF2C97CF5AAF499F019B3188A62AC1F 520528ca0f011cf53731da61726e91c9472245d24eb3b0c7cc1cd2e01264d8d0 cf4ea080-4ab2-11f1-a4b2-00155d0001a1 https://dk.um.si/Dokument.php?lang=slv&id=205920 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0