Some Design Considerations For High-power High-voltage Dc/dc Converter With Improved Power Density And Efficiency

Dmitri Vinnikov

doi:10.18618/REP.2009.4.297304

Authors

Dmitri Vinnikov Department of Electrical Drives and Power Electronics, Tallinn University of Technology Ehitajate tee 5, Tallinn, 19086, Estonia. Tel. (+372) 6203705, Fax. (+372) 6203701

DOI:

https://doi.org/10.18618/REP.2009.4.297304

Keywords:

assembly, cost-effectiveness, current doubler rectifier, high-power DC/DC converter, high-voltage IGBTs, rolling stock, three-level inverter

Abstract

This paper presents the findings of a R&D project connected to the development of 50 kW auxiliary power supply for the high-voltage DC-fed commuter trains. The aim was to design a new-generation power converter utilizing high-voltage IGBT modules, which can outpace the predecessor (6.5 kV IGBT based twolevel half-bridge DC/DC converter) in terms of power density, i.e. to provide more power for smaller volumetric space. The topology proposed is 3.3 kV IGBT based three-level neutral point clamped half-bridge with the high-frequency isolation transformer and the current doubler rectifier that fulfils all the targets imposed by the designers. Despite an increased component count the proposed converter is very simple in design and operation. The paper provides an overview of the design with several recommendations and guidelines as well as the feasibility and performance comparison of the proposed converter with the 6.5 kV IGBT based two-level half-bridge DC/DC converter.

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Author Biography

Dmitri Vinnikov, Department of Electrical Drives and Power Electronics, Tallinn University of Technology Ehitajate tee 5, Tallinn, 19086, Estonia. Tel. (+372) 6203705, Fax. (+372) 6203701

received the Dipl.Eng, M.Sc. and Dr.Sc.techn. degrees in electrical engineering from Tallinn University of Technology, Tallinn, Estonia, in 1999, 2001 and 2005, respectively. He is presently a Senior Researcher in the Department of Electrical Drives and Power Electronics, Tallinn University of Technology. He has authored more than 100 published papers on power converters design and development and is the holder of several Utility Models in this application field. His research interests include switchmode power converters, modeling and simulation of power systems, applied design of power converters and control systems and application and development of energy storages.

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