Transformer Design for Isolated Switching Converters Based on Geometric Form Factors of Magnetic Cores

This paper discusses issues related to the transformer design for switch-mode power supplies based on the use of geometric form factors (GFFs) of magnetic cores. It is shown that GFFs allow a straightforward and reliable transformer design complying with loss and size constraints. It is also proved that inherent assumptions underlying the application of previous design methods based on some geometric constants can be penalizing if the effects of specific combinations of GFFs of magnetic cores are not properly considered. Examples regarding the design of transformers for forward converters are presented and discussed.

[1]  Qing Lu,et al.  Model and design of PCB parallel winding for planar transformer , 2003 .

[2]  Michael A. E. Andersen,et al.  Optimal Design and Tradeoff Analysis of Planar Transformer in High-Power DC–DC Converters , 2012, IEEE Transactions on Industrial Electronics.

[3]  Yan-Fei Liu,et al.  A Practical Transformer Core Loss Measurement Scheme for High-Frequency Power Converter , 2008, IEEE Transactions on Industrial Electronics.

[4]  J. B. Klaassens,et al.  Design of a high-frequency planar power transformer in multilayer technology , 1991 .

[5]  J. Bocker,et al.  Optimized size design of integrated magnetic components using area product approach , 2005, 2005 European Conference on Power Electronics and Applications.

[6]  Nicola Femia,et al.  Optimal Buck Converter Output Filter Design for Point-of-Load Applications , 2010, IEEE Transactions on Industrial Electronics.

[7]  Philippe Viarouge,et al.  An automated system for core loss measurement and characterization: a useful tool for high frequency magnetic components design , 1998, IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357).

[8]  Yan-Fei Liu,et al.  A Practical Copper Loss Measurement Method for the Planar Transformer in High-Frequency Switching Converters , 2007, IEEE Transactions on Industrial Electronics.

[9]  R. Petkov,et al.  Optimum design of a high-power, high-frequency transformer , 1996 .

[10]  Concettina Buccella,et al.  A Coupled Electrothermal Model for Planar Transformer Temperature Distribution Computation , 2008, IEEE Transactions on Industrial Electronics.

[11]  Ali I. Maswood,et al.  Design aspects of planar and conventional SMPS transformer: a cost benefit analysis , 2003, IEEE Trans. Ind. Electron..

[12]  N. Femia,et al.  A novel approach to transformers design based on acceptability boundary curves of magnetic cores , 2010, 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics (COMPEL).

[13]  E.I. Amoiralis,et al.  Transformer Design and Optimization: A Literature Survey , 2009, IEEE Transactions on Power Delivery.

[14]  M. Phil,et al.  High Frequency Transformer for Switching Mode Power Supplies , 2004 .