Title :
Calculation of eddy current losses in nonlinear ferromagnetic materials
Author :
Labridis, Dimitris ; Dokopoulos, Petros
Author_Institution :
Dept. of Electr. Eng., Aristotelian Univ. of Thessaloniki, Greece
fDate :
5/1/1989 12:00:00 AM
Abstract :
A complex analysis of the nonlinear diffusion problem in ferromagnetic materials under steady-state excitation is presented. The problem is solved by considering an equivalent fictitious material where the relative permeability is assumed to be constant in time but different from point to point and is related to the nonlinear B-H characteristic curve with the help of the stored magnetic co-energy density. Eddy current losses are calculated in a one-dimensional thick steel plate. A comparison made with results obtained from the classical step-by-step method shows a good agreement
Keywords :
eddy current losses; ferromagnetism; magnetisation; complex analysis; eddy current losses; equivalent fictitious material; nonlinear B-H characteristic curve; nonlinear diffusion problem; nonlinear ferromagnetic materials; one-dimensional thick steel plate; steady-state excitation; step-by-step method; stored magnetic co-energy density; Eddy currents; Magnetic fields; Magnetic flux; Magnetic materials; Nonlinear equations; Permeability; Power system modeling; Saturation magnetization; Steady-state; Steel;
Journal_Title :
Magnetics, IEEE Transactions on
