Title :
Study of loss mechanisms of Mn-Zn ferrites in the frequency from 1 MHz to 10 MHz
Author :
Tung, M.J. ; Chang, W.C. ; Liu, C.S. ; Liu, T.Y. ; Chen, C.J. ; Tseng, T.Y.
Author_Institution :
Inst. of Electron., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
11/1/1993 12:00:00 AM
Abstract :
The core loss mechanism of low loss grade Mn-Zn ferrite in the frequency range from 1 MHz to 10 MHz was investigated. Under the condition of f.B=25 kHz. T, it was found that dielectric loss dominated the core loss at frequencies between 1.1 and 3 MHz, while eddy current loss dominated the core loss at frequencies higher than 3 MHz. It is suggested that decrease of grain boundary capacitance and increase of grain resistivity of the core may be the suitable ways for the Mn-Zn ferrites to be used at this frequency region
Keywords :
dielectric losses; eddy current losses; ferrimagnetic properties of substances; ferrites; magnetic cores; magnetic leakage; manganese compounds; zinc compounds; 1 to 10 MHz; Mn-Zn ferrites; MnZnFe2O4; core loss mechanism; dielectric loss; eddy current loss; frequency range; grain boundary capacitance; grain resistivity; Conductivity; Core loss; Ferrites; Frequency measurement; Impedance; Loss measurement; Permeability measurement; Physics; Powders; Power measurement;
Journal_Title :
Magnetics, IEEE Transactions on
