The behavior of the magnetic components in high frequency switched power supplies depends significantly on the working frequency due to distributed magnetic and electrical field effects. Measurement equipment such as an impedance analyzer usually offers simple equivalent models which allow characterization of the frequency behavior of some magnetic components. However it is useful to have a procedure to generate more sophisticated models for all magnetic components including coupled inductors and multi-winding transformers in order to characterize more accurately its frequency behavior. In this paper a procedure is presented to obtain the parameters of a frequency dependent and distributed effects model of magnetic components from actual measurements. This model is suitable for use with all wave-forms of the voltage applied to the magnetic component and to separate the working conditions of the different windings.
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Pleite et al. (2002) studied this question.
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