TY CONF TI SIMPLIFIED MATHEMATICAL MODEL OF A MAGNETIC SYSTEM WITH A CIRCULAR MAGNETIC CONDUCTOR KW magnetic flux KW magnetic system KW mathematical model KW potential KW coordinate system JO CAD/EDA/SIMULATION IN MODERN ELECTRONICS 2021 AU Kreselyuk, Y.V. AU Ivzhenko, A.A. AU Kirsa, M.N. PY 2021 PB Bryansk State Technical University