Fully integrated planar magnetics for primary-parallel isolated boost converter

A high efficient planar integrated magnetics (PIM) design approach for primary parallel isolated boost converters is presented. All magnetic components in the converter including two input inductors and two transformers with primary-parallel and secondary-series windings are integrated into an E-I-E core geometry. Due to a low reluctance path provided by the shared I-core, the two transformers as well as the two input inductors can be integrated independently, reducing the total ferrite volume and core loss. AC losses in the windings and the leakage inductance of the transformer are kept low by interleaving the primary and secondary turns of the transformers. To verify the validity of the design approach, a 1-kW prototype converter with two primary power stages is implemented for a fuel cell fed battery charger application with 20–40 V input and 170–230 V output. An efficiency of 96% can be achieved during nominal operating conditions. Also experimental comparisons between the PIM module and two separate cases have been done in order to illustrate the advantages of the proposed method.

[1]  J.D. van Wyk,et al.  Comparison of Different Designs of a 42-V/14-V DC/DC Converter Regarding Losses and Thermal Aspects , 2007, IEEE Transactions on Industry Applications.

[2]  W. Roshen,et al.  High-Frequency Fringing Fields Loss in Thick Rectangular and Round Wire Windings , 2008, IEEE Transactions on Magnetics.

[3]  Jan Abraham Ferreira,et al.  Improved analytical modeling of conductive losses in magnetic components , 1994 .

[4]  S. Havanur.  Quasi-clamped Inductive Switching behaviour of power Mosfets , 2008, 2008 IEEE Power Electronics Specialists Conference.

[5]  A.M. Pernia,et al.  Turn-coupling in thick-film integrated magnetic components for power converters , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[6]  Yim-Shu Lee,et al.  A Four-Phase Forward Converter Using an Integrated Transformer , 2008, IEEE Transactions on Industrial Electronics.

[7]  Michael A. E. Andersen,et al.  New geometry integrated inductors in two-channel interleaved bidirectional converter , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[8]  J. Kolar,et al.  Core losses under DC bias condition based on Steinmetz parameters , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[9]  T. O'Donnell,et al.  A review of planar magnetic techniques and technologies , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[10]  J. D. van Wyk,et al.  Design, prototyping and assessment of a 3 kW integrated LCT component for deployment in various resonant converters , 2009 .

[11]  A. Van den Bossche,et al.  Measurement and loss model of ferrites with non-sinusoidal waveforms , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[12]  J.A. Cobos,et al.  A full procedure to model integrated magnetics based on FEA , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[13]  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..

[14]  Zhe Zhang,et al.  Planar-Integrated Magnetics (PIM) Module in Hybrid Bidirectional DC–DC Converter for Fuel Cell Application , 2011, IEEE Transactions on Power Electronics.

[15]  Milan M. Jovanovic,et al.  Analysis, design, and evaluation of forward converter with distributed magnetics-interleaving and transformer paralleling , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[16]  W. Fu,et al.  A dynamic core loss model for soft ferromagnetic and power ferrite materials in transient finite element analysis , 2004, IEEE Transactions on Magnetics.

[17]  Morten Nymand,et al.  New Primary-Parallel Boost Converter for High-Power High-Gain Applications , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[18]  Michael A. E. Andersen,et al.  High-Efficiency Isolated Boost DC–DC Converter for High-Power Low-Voltage Fuel-Cell Applications , 2010, IEEE Transactions on Industrial Electronics.

[19]  Michael A. E. Andersen,et al.  Planar integrated magnetics design in wide input range DC-DC converter for fuel cell application , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[20]  P. Bauer,et al.  Toward the Next Level of PCB Usage in Power Electronic Converters , 2008, IEEE Transactions on Power Electronics.

[21]  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..

[22]  Michael A. E. Andersen,et al.  Integrated current balancing transformer for primary parallel isolated boost converter , 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.

[23]  Peng Xu,et al.  Investigating coupling inductors in the interleaving QSW VRM , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[24]  Jian Sun,et al.  Integrated magnetics for current-doubler rectifiers , 2004, IEEE Transactions on Power Electronics.

[25]  H. Grotstollen,et al.  Improved analytical modeling of conductive losses in gapped high-frequency inductors , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[26]  B. Lehman,et al.  An integrated magnetic isolated two-inductor boost converter: analysis, design and experimentation , 2005, IEEE Transactions on Power Electronics.

[27]  Michael A. E. Andersen,et al.  A new very-high-efficiency R4 converter for high-power fuel cell applications , 2009, 2009 International Conference on Power Electronics and Drive Systems (PEDS).

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

[29]  Michael A. E. Andersen,et al.  The analysis and comparison of leakage inductance in different winding arrangements for planar transformer , 2009, 2009 International Conference on Power Electronics and Drive Systems (PEDS).

[30]  Charles R. Sullivan,et al.  Computationally efficient winding loss calculation with multiple windings, arbitrary waveforms, and two-dimensional or three-dimensional field geometry , 2001 .

[31]  J.D. Van Wyk,et al.  Design of planar integrated passive module for zero-voltage switched asymmetrical half bridge PWM converter , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[32]  Charles R. Sullivan,et al.  An improved calculation of proximity-effect loss in high-frequency windings of round conductors , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[33]  Peng Xu,et al.  A novel integrated current doubler rectifier , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

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

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

[36]  Michael A. E. Andersen,et al.  Analysis and Design of Fully Integrated Planar Magnetics for Primary–Parallel Isolated Boost Converter , 2013, IEEE Transactions on Industrial Electronics.

[37]  Morten Nymand,et al.  High Efficiency Power Converter for Low Voltage High Power Applications , 2010 .

[38]  J.D. van Wyk,et al.  Power electronic subassemblies with increased functionality based on planar sub-components , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[39]  P. L. Dowell,et al.  Effects of eddy currents in transformer windings , 1966 .

[40]  Fred C. Lee,et al.  High frequency bus converter with integrated matrix transformers for CPU and telecommunications applications , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[41]  H. Kosai,et al.  Coupled Inductor Characterization for a High Performance Interleaved Boost Converter , 2009, IEEE Transactions on Magnetics.

[42]  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).

[43]  Michael A. E. Andersen,et al.  Low profile, low cost, new geometry integrated inductors , 2011, 2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[44]  M.A.E. Andersen,et al.  What is the best converter for low voltage fuel cell applications- a Buck or Boost? , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[45]  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).

[46]  Peng Xu,et al.  Design of 48 V Voltage regulator modules with a novel integrated magnetics , 2002 .

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

[48]  G. Hua,et al.  Design of high efficiency, low profile, low voltage converter with integrated magnetics , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.