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

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

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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 read more 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 click here 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.