DocumentCode :
1247913
Title :
Evaluation of Magnetic Materials for Very High Frequency Power Applications
Author :
Han, Yehui ; Cheung, Grace ; Li, An ; Sullivan, Charles R. ; Perreault, David J.
Author_Institution :
Univ. of Wisconsin-Madison, Madison, WI, USA
Volume :
27
Issue :
1
fYear :
2012
Firstpage :
425
Lastpage :
435
Abstract :
This paper investigates the loss characteristics of RF magnetic materials for power conversion applications in the 10 to 100 MHz range. A measurement method is proposed that provides a direct measurement of an inductor quality factor QL as a function of inductor current at RF frequencies, and enables indirect calculation of core loss as a function of flux density. Possible sources of error in measurement and calculation are evaluated and addressed. The proposed method is used to identify loss characteristics of several commercial RF magnetic-core materials. The loss characteristics of these materials, which have not previously been available, are illustrated and compared in tables and figures. The use of the method and data is demonstrated in the design of a magnetic-core inductor, which is applied in a 30-MHz inverter. The results of this paper are thus useful for the design of magnetic components for very high frequency applications.
Keywords :
Q-factor; inductors; magnetic cores; magnetic materials; power conversion; RF frequencies; RF magnetic materials; flux density; frequency 10 MHz to 100 MHz; inductor quality factor; magnetic core inductor; power conversion; very high frequency power applications; Capacitors; Core loss; Frequency measurement; Inductors; Loss measurement; Magnetic cores; Resonant frequency; Magnetic materials; Steinmetz parameters; resonant inductor; very high frequency (VHF);
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2011.2159995
Filename :
5893949
Link To Document :
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