Obtaining a frequency dependent and effect distributed model of magnetic components from actual measurements

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.

[1]  H.A. Owen,et al.  Cross-coupled-secondaries model for multiwinding transformers with parameter values calculated from short-circuit impedances , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[2]  Fred C. Lee,et al.  Edge effect analysis in a high-frequency transformer , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[3]  V. A. Niemela,et al.  Calculating the short-circuit impedances of a multiwinding transformer from its geometry , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[4]  David Jiles,et al.  Theory of ferromagnetic hysteresis: determination of model parameters from experimental hysteresis loops , 1989 .

[5]  Oscar Garcia,et al.  Model of the capacitive effects in magnetic components , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[6]  F. C. Lee,et al.  A comparative study of high-frequency, low-profile planar transformer technologies , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[7]  Fred C. Lee,et al.  Leakage inductance and termination effects in a high-power planar magnetic structure , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[8]  Jose A. Cobos,et al.  New modeling strategy for high frequency magnetic components , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[9]  A.M. Pernia,et al.  1D/2D transformer electric model for simulation in power converters , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[10]  J. Alonso,et al.  A complete transformer electric model, including frequency and geometry effects , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[11]  Oscar Garcia,et al.  A full procedure to model high frequency transformer windings , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[12]  Andrei Vladimirescu,et al.  Nonlinear transformer model for circuit simulation , 1991, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..