Core losses under DC bias condition based on Steinmetz parameters

When designing inductive components, calculating core losses is a difficult and not yet entirely solved problem. In particular it is impossible to predict the influence of a DC premagnetization on the losses without performing extensive measurements. For this work, different materials have been tested to gain information how core losses are influenced by a premagnetization. Measurements on molypermalloy powder, silicon steel, nanocrystalline material, and ferrite cores have been performed. Of the tested materials, a premagnetization mainly influences losses in ferrites and nanocrystalline materials, whereas the influence of a premagnetization in molypermalloy powder cores, and cores of silicon steel is negligible. The Steinmetz Premag-netization Graph (SPG) that shows the dependency of the Steinmetz parameters (α, β and k) on premagnetization is introduced. This permits the calculation of core losses under DC bias conditions. Such graphs are given for different materials and different operating temperatures. In addition, a detailed description of the test system is given, as high accuracy is crucial.

[1]  John A. Nelder,et al.  A Simplex Method for Function Minimization , 1965, Comput. J..

[2]  C.R. Sullivan,et al.  Improved calculation of core loss with nonsinusoidal waveforms , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[3]  A. Ecklebe,et al.  A novel approach for 3d air gap reluctance calculations , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[4]  F. D. Tan,et al.  A practical approach for magnetic core-loss characterization , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[5]  Alex Van den Bossche,et al.  Inductors and Transformers for Power Electronics , 2005 .

[6]  S. Iyasu,et al.  A novel iron loss calculation method on power converters based on dynamic minor loop , 2005, 2005 European Conference on Power Electronics and Applications.

[7]  R. D. De Doncker,et al.  Calculation of losses in ferro- and ferrimagnetic materials based on the modified Steinmetz equation , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[8]  A. Brockmeyer.  Experimental evaluation of the influence of DC-premagnetization on the properties of power electronic ferrites , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[9]  Alfred Rufer,et al.  Global Loss Evaluation Methods for Nonsinusoidally Fed Medium-Frequency Power Transformers , 2009, IEEE Transactions on Industrial Electronics.

[10]  Harry A. Owen,et al.  High-frequency measurement techniques for magnetic cores , 1985, 1985 IEEE Power Electronics Specialists Conference.

[11]  D. Boroyevich,et al.  Loss Characterization and Calculation of Nanocrystalline Cores for High-Frequency Magnetics Applications , 2007, IEEE Transactions on Power Electronics.

[12]  T. Shimizu,et al.  Evaluation of the iron loss of an inductor based on dynamic minor characteristics , 2007, 2007 European Conference on Power Electronics and Applications.

[13]  K. Ishii,et al.  An Iron Loss Calculating Method for AC Filter Inductors Used on PWM Inverters , 2006 .

[14]  U. Madawala,et al.  The Effect of DC Bias Conditions on Ferrite Core Losses , 2008, IEEE transactions on magnetics.

[15]  W.A. Roshen,et al.  A practical, accurate and very general core loss model for nonsinusoidal waveforms , 2007, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[16]  Fred C. Lee,et al.  New core loss measurement method for high frequency magnetic materials , 2014, 2010 IEEE Energy Conversion Congress and Exposition.

[17]  B. Carsten,et al.  A New Technique for Measuring Ferrite Core Loss Under DC Bias Conditions , 2008, IEEE Transactions on Magnetics.

[18]  J. W. Kolar,et al.  Loss modeling of inductive components employed in power electronic systems , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[19]  Chas.P. Steinmetz,et al.  On the law of hysteresis , 1984, Proceedings of the IEEE.

[20]  F. Brailsford.  Soft FerritesߞProperties and Applications , 1970 .

[21]  M. S. Lancarotte,et al.  Estimation of FeSi Core Losses Under PWM or DC Bias Ripple Voltage Excitations , 2005, IEEE Transactions on Energy Conversion.

[22]  J.W. Kolar,et al.  Impact of Power Density Maximization on Efficiency of DC–DC Converter Systems , 2009, IEEE Transactions on Power Electronics.

[23]  Charles R. Sullivan,et al.  Accurate prediction of ferrite core loss with nonsinusoidal waveforms using only Steinmetz parameters , 2002, 2002 IEEE Workshop on Computers in Power Electronics, 2002. Proceedings..