Title :
Temperature dependence of power loss of Mn-Zn ferrites at high frequency
Author :
Suh, J.J. ; Song, B.M. ; Han, Y.H.
Author_Institution :
ISU Ceramic, Wonju, South Korea
fDate :
9/1/2000 12:00:00 AM
Abstract :
The power loss characteristics of Mn-Zn ferrites were observed up to 1 MHz at 25 mT as a function of temperature. At 100 kHz the temperature at which the power loss minimum occurred was near 70°C, at 500 kHz 50°C and at 1 MHz even lower. The contribution of eddy current loss to the temperature dependence of the total power loss was negligibly small at 1 MHz because the resistivity is independent of temperature. The contribution of the residual loss due to magnetic rotation was significant and strongly temperature dependent at 1 MHz. The frequency where the residual loss starts to increase was in good agreement with the onset frequency of dissipation of the complex permeability
Keywords :
eddy current losses; ferrites; magnetic hysteresis; magnetic permeability; manganese compounds; zinc compounds; 1 MHz; 100 kHz; 25 mT; 500 kHz; Mn-Zn ferrites; Mn0.71Zn0.22Fe2.07O4; complex permeability; dissipation; eddy current loss; high frequency; hysteresis loss; magnetic rotation; onset frequency; power loss; residual loss; resistivity; temperature dependence; Eddy currents; Ferrites; Frequency measurement; Loss measurement; Magnetic hysteresis; Permeability; Power measurement; Switched-mode power supply; Temperature control; Temperature dependence;
Journal_Title :
Magnetics, IEEE Transactions on
