NDLI: A coupled thermal magnetic model for high frequency transformers. I. Model formulation and material properties

Content Provider	IEEE Xplore Digital Library
Author	Nelson, D.J. Jessee, J.P.
Copyright Year	1978
Abstract	A new model for analyzing high-frequency transformers is presented. The model is based on the simultaneous solution of the coupled, nonlinear thermal, and electromagnetic equations. The modeling and assumptions used to derive the governing equations are explained. A set of integrodifferential constraints is developed to apply the proper input voltage and output impedance to the transformer windings. A method of modeling the magnetic material properties as a function of temperature and magnetic flux density is given. A novel technique for modeling the complex reluctivity of the soft ferrite core material permits a time harmonic transformation of the electromagnetic equations. This eliminates the need to step through time while maintaining the effects of hysteresis losses. Also, a quasi-steady formulation of the heat conduction equation eliminates the time dependency of the thermal problem.<>
Sponsorship	IEEE Electronic Industries Alliance American Society of Mechanical Engineering (ASME) NBS SAE
Starting Page	730
Ending Page	739
Page Count	10
File Size	920495
File Format	PDF
ISSN	01486411
Volume Number	15
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1992-10-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Transformers Electromagnetic modeling Electromagnetic coupling Nonlinear equations Magnetic materials Magnetic flux Magnetic analysis Impedance Windings
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Electronic, Optical and Magnetic Materials Engineering Electrical and Electronic Engineering

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