High-Precision Simulation for Structure and Efficiency Optimization of High-Power High-Frequency Transformer

High-power high-frequency transformer is a crucial component of isolated DC-DC converters. To optimize the structure and efficiency of high-frequency high-power transformer, high-precision estimation of transformer parameters is necessary. This paper proposes to adopt high-precision FEA simulations in parameter estimation including the dielectric strength for insulation design and the core loss. In addition, the difference of core loss estimation principle between different types of core material is pointed out. The proposed methods are applied to a specific case of transformer design to demonstrate the effects of the proposed methods in structure and efficiency optimization. Experiments will be performed in future research to verify the accuracy of the proposed core loss estimation methods and the feasibility and high efficiency of the proposed design scheme.

[1]  S. Bhattacharya,et al.  Thermal profile shaping and loss impacts of strain annealing on magnetic ribbon cores , 2018, Journal of Materials Research.

[2]  Bin Li,et al.  High-Frequency Transformer Design for Modular Power Conversion From Medium-Voltage AC to 400 VDC , 2018, IEEE Transactions on Power Electronics.

[3]  Johann W. Kolar,et al.  Design and Experimental Analysis of a Medium-Frequency Transformer for Solid-State Transformer Applications , 2017, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[4]  Jurgen Biela,et al.  Design and optimization of medium frequency, medium voltage transformers , 2013, 2013 15th European Conference on Power Electronics and Applications (EPE).

[5]  Ion Etxeberria-Otadui,et al.  Proposal and validation of medium-frequency power transformer design methodology , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[6]  H. Akagi,et al.  A Bidirectional DC–DC Converter for an Energy Storage System With Galvanic Isolation , 2007, IEEE Transactions on Power Electronics.

[7]  Jae Seung Lee,et al.  A High-Density, High-Efficiency, Isolated On-Board Vehicle Battery Charger Utilizing Silicon Carbide Power Devices , 2014, IEEE Transactions on Power Electronics.

[8]  Fred C. Lee,et al.  A new core loss model for rectangular AC voltages , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[9]  Drazen Dujic,et al.  Power Electronic Traction Transformer—Medium Voltage Prototype , 2014, IEEE Transactions on Industrial Electronics.

[10]  Jürgen Biela,et al.  Design procedure of a 14.4 kV, 100 kHz transformer with a high isolation voltage (115 kV) , 2017, IEEE Transactions on Dielectrics and Electrical Insulation.

[11]  Bernardo Cougo.  Optimal cross section shape of tape wound cores , 2015, 2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe).

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

[13]  G. AlLee,et al.  Edison Redux: 380 Vdc Brings Reliability and Efficiency to Sustainable Data Centers , 2012, IEEE Power and Energy Magazine.

[14]  Torbjorn Thiringer,et al.  Design methodology and optimization of a medium frequency transformer for high power DC-DC applications , 2015, 2015 IEEE Applied Power Electronics Conference and Exposition (APEC).