Title :
Modelling of nonlinear magnetic material using a complex effective reluctivity
Author :
Lederer, Dieter ; Kost, Arnulf
Author_Institution :
Inst. fur Elektrische Energietech., Tech. Univ. Berlin, Germany
fDate :
9/1/1998 12:00:00 AM
Abstract :
The modelling of nonlinear hysteretic magnetic material in the computation of shielding problems with sinusoidal excitation at power frequency is investigated. A complex valued effective reluctivity model is chosen which allows a sinusoidal calculation in spite of the material´s nonlinearity. The absolute value and the phase of the reluctivity are determined from the hysteresis curves of the material. The complex Newton-Raphson method is adapted to solve the equation system. The results obtained are compared with measurements and with calculation results using a real valued effective reluctivity
Keywords :
Newton-Raphson method; ferromagnetic materials; finite element analysis; magnetic hysteresis; magnetic shielding; Newton-Raphson method; complex effective reluctivity; hysteretic magnetic material; nonlinear magnetic material; shielding problems; sinusoidal calculation; sinusoidal excitation; Electromagnetic fields; Finite element methods; Magnetic field measurement; Magnetic hysteresis; Magnetic materials; Material properties; Newton method; Nonlinear equations; Nonlinear magnetics; Power cables;
Journal_Title :
Magnetics, IEEE Transactions on
