Abstract
This paper describes the power loss characteristics of Mn-Zn and Ni-Zn ferrite cores in the high-frequency range. Two kinds of Mn-Zn and an Ni-Zn ferrite material were used to verify the proposed magnetization model. To analyze the iron loss, we propose an equivalent circuit of ferrite cores, whose circuit elements are derived from measured material constants. Analysis of the power loss, showed that the dielectric loss and magnetic loss are dominant in the high-frequency region. Ferrite cores having a large relative permittivity have a considerable skin effect, which accounts for the complex frequency characteristics of the iron loss in Mn-Zn ferrites.
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