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

A novel 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 const...

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Main Authors: Nelson, D.J., Jessee, J.P.
Format: Conference Proceeding
Language:English
Subjects:
Electromagnetic coupling
Electromagnetic modeling
Frequency
Impedance
Magnetic materials
Magnetic properties
Nonlinear equations
Temperature
Transformers
Windings
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Jessee, J.P.
description A novel 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 are developed to apply the proper input voltage and output impedance to the transformer windings. Next, 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. A quasi-steady formulation of the heat-conduction equation eliminates the time dependence of the thermal problem.< >
doi_str_mv 10.1109/ITHERM.1992.187737
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Model formulation and material properties</title><author>Nelson, D.J. ; Jessee, J.P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i87t-e06d0c3cd661a4ea90d31c9a56d303579b00424b1ed705679fc15517801ec9db3</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Electromagnetic coupling</topic><topic>Electromagnetic modeling</topic><topic>Frequency</topic><topic>Impedance</topic><topic>Magnetic materials</topic><topic>Magnetic properties</topic><topic>Nonlinear equations</topic><topic>Temperature</topic><topic>Transformers</topic><topic>Windings</topic><toplevel>online_resources</toplevel><creatorcontrib>Nelson, D.J.</creatorcontrib><creatorcontrib>Jessee, J.P.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Xplore</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Nelson, D.J.</au><au>Jessee, J.P.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>A coupled thermal-magnetic model for high frequency transformers. 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ispartof [1992 Proceedings] Intersociety Conference on Thermal Phenomena in Electronic Systems, 1992, p.23-31
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Electromagnetic coupling
Electromagnetic modeling
Frequency
Impedance
Magnetic materials
Magnetic properties
Nonlinear equations
Temperature
Transformers
Windings
title A coupled thermal-magnetic model for high frequency transformers. I. Model formulation and material properties
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