Viscosity-based magnetodynamic model of soft magnetic materials
- Resource Type
- Periodical
- Authors
- Zirka, S.E.; Moroz, Y.I.; Marketos, P.; Moses, A.J.
- Source
- IEEE Transactions on Magnetics IEEE Trans. Magn. Magnetics, IEEE Transactions on. 42(9):2121-2132 Sep, 2006
- Subject
- Fields, Waves and Electromagnetics
Soft magnetic materials
Magnetic flux
Pulse width modulation
Viscosity
Maxwell equations
Steel
Differential equations
Magnetization
Pulse circuits
Space vector pulse width modulation
Finite-difference time-domain analysis
magnetic hysteresis
magnetic losses
soft magnetic materials
- Language
- ISSN
- 0018-9464
1941-0069
A time-stepping method based on the concept of magnetic viscosity developed to reproduce the excess loss in electrical steel is proposed. A numerical scheme for simultaneous solution of Maxwell equations and equations describing the magnetic viscosity has been developed. The method is suitable for describing arbitrary magnetization regimes such as waveforms associated with pulsewidth modulation (PWM) voltage excitation, and the model differential equations can be conveniently combined with equations of an external electric circuit. The accuracy of the proposed dynamic model is shown using three nonoriented electrical steel as examples. Fitting of the magnetic viscosity parameters for one sinusoidal flux regime enables dynamic hysteresis loops and losses to be predicted with high accuracy over a wide range of frequencies and amplitudes of sinusoidal or nonsinusoidal flux densities.