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An example of dB / dt characteristics of the dynamic magnetic loss parameter
Author(s) -
Saotome Hideo,
Kuwahara Shun
Publication year - 2007
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.20209
Subject(s) - excitation , ferrite (magnet) , power loss , ferrite core , hysteresis , materials science , power (physics) , electronic circuit , nuclear magnetic resonance , ranging , magnetic circuit , 500 khz , electrical engineering , physics , computational physics , control theory (sociology) , condensed matter physics , computer science , engineering , magnet , telecommunications , electromagnetic coil , thermodynamics , control (management) , artificial intelligence
Ferrite cores are used for power electronics circuits operating under excitation conditions of frequency ranging from hundreds of kilohertz to several tens of megahertz. Development of a mathematical model enabling the estimation of the power loss of ferrites in high‐frequency regions, contributes to the designing of power circuits. The power loss in high‐frequency regions consists of hysteresis and dynamic magnetic losses. Although hysteresis loss does not depend on the excitation frequency, the dynamic magnetic loss increases with increasing excitation frequency. The dynamic magnetic loss parameter, λ f , has been introduced for identifying the power loss in high‐frequency regions. In this study, λ f − dB / dt characteristics are experimentally obtained by a newly introduced hysteresis model that uses a normal distribution function. It is found that the λ f − dB / dt characteristics do not depend on the size of B − H loops. The instantaneous power loss of a ferrite core in the high‐frequency region can be calculated using the λ f − dB / dt characteristics. Copyright © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.