Original scientific paper

https://doi.org/10.7305/automatika.54-2.424

High Power Soft–switching IGBT DC–DC Converter

Neven Čobanov ; KONČAR, Electrical Engineering Institute, Fallerovo šetalište 22, HR-10000, Zagreb, Croatia
Željko Jakopović ; University of Zagreb, Faculty of Electrical Engineering and Computing, Department of Electric Machines, Drives and Automation, Unska 3, HR-10000, Zagreb, Croatia
Viktor Šunde orcid.org/0000-0002-0705-4429 ; University of Zagreb, Faculty of Electrical Engineering and Computing, Department of Electric Machines, Drives and Automation, Unska 3, HR-10000, Zagreb, Croatia

Abstract

A soft-switching topology for high power buck converter is proposed. Zero-current turn-on and zero-voltage turn-off is achieved without auxiliary switches. All active switches in the converter transmit power to the load equally. Converter control is simple despite four active switches. Converter operation is described and DC analysis is carried out. All operation modes are identified. The condition for soft-switching is derived. A full-scale 38 kW laboratory prototype with 1700 V IGBT modules is built for railway application. Switching frequency is fixed at 20 kHz. Experimental results are shown. The results confirm the analysis. A high efficiency of 97 % is achieved.

Keywords

buck converter; IGBT switch; soft-switching; static characteristic

Hrčak ID:

103410

URI

https://hrcak.srce.hr/103410

Publication date:

2.5.2013.

Article data in other languages: croatian

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