An improved high‐voltage IGBT‐based half‐bridge DC/DC converter for railway applications
ISSN: 0332-1649
Article publication date: 4 January 2011
Abstract
Purpose
The paper presents the findings of an 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 introduce a new generation power converter utilizing high‐voltage insulated gate bibolar transistor (IGBT) modules, which can outpace the predecessors in terms of efficiency and power density, i.e. to provide more power for smaller volumetric space.
Design/methodology/approach
For development of the proposed converter, mathematical analysis and computer simulations were used. The software intended for simulations is Ansoft Simplorer, which is a mixed‐technology simulator for electrical, electromechanical, power electronic systems and drive applications. For the verification of theoretical results the full‐scale laboratory prototype of the proposed converter was developed and tested.
Findings
Thanks to increased switching frequency and current‐doubler rectifier (CDR) implemented in the proposed converter, the power dissipation of the isolation transformer was reduced by 30 percent as compared to earlier designs. Moreover, the 27 and 24 percent reductions in rectifier and inductor losses, respectively, led to approximately 1 percent efficiency rise of the proposed converter in comparison with its predecessors. Also, the proposed three‐level topology outpaces the two‐level one by more than 20 percent in terms of power density.
Practical implications
The proposed converter topology is aimed for the high‐voltage DC trains. With small modifications it also can be used in trams, trolleybuses as well as in some industrial applications.
Originality/value
The paper presents the novel DC/DC converter topology with 3.3 kV IGBT‐based three‐level neutral point clamped inverter, high‐frequency isolation transformer and the CDR.
Keywords
Citation
Vinnikov, D. and Laugis, J. (2011), "An improved high‐voltage IGBT‐based half‐bridge DC/DC converter for railway applications", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 30 No. 1, pp. 280-299. https://doi.org/10.1108/03321641111091566
Publisher
:Emerald Group Publishing Limited
Copyright © 2011, Emerald Group Publishing Limited